| /* |
| * Copyright (c) 2004-2009 Sergey Lyubka |
| * Portions Copyright (c) 2009 Gilbert Wellisch |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| * |
| * $Id: mongoose.c 446 2009-07-08 21:06:56Z valenok $ |
| */ |
| |
| #if defined(_WIN32) |
| #define _CRT_SECURE_NO_WARNINGS /* Disable deprecation warning in VS2005 */ |
| #endif /* _WIN32 */ |
| |
| #ifndef _WIN32_WCE /* Some ANSI #includes are not available on Windows CE */ |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <fcntl.h> |
| #endif /* !_WIN32_WCE */ |
| |
| #include <time.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <assert.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| |
| #if defined(_WIN32) /* Windows specific #includes and #defines */ |
| #ifdef _WIN32_WINNT |
| #undef _WIN32_WINNT |
| #define _WIN32_WINNT 0x0400 /* To make it link in VS2005 */ |
| #else |
| #define _WIN32_WINNT 0x0400 /* To make it link in VS2005 */ |
| #endif |
| #include <windows.h> |
| #include <winsock2.h> |
| |
| #ifndef _WIN32_WCE |
| #include <process.h> |
| #include <direct.h> |
| #include <io.h> |
| #else /* _WIN32_WCE */ |
| /* Windows CE-specific definitions */ |
| #include <winsock2.h> |
| #define NO_CGI /* WinCE has no pipes */ |
| #define NO_SSI /* WinCE has no pipes */ |
| |
| #define FILENAME_MAX MAX_PATH |
| #define BUFSIZ 4096 |
| typedef long off_t; |
| |
| #define errno GetLastError() |
| #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) |
| #endif /* _WIN32_WCE */ |
| |
| #define EPOCH_DIFF 0x019DB1DED53E8000 /* 116444736000000000 nsecs */ |
| #define RATE_DIFF 10000000 /* 100 nsecs */ |
| #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ |
| ((uint64_t)((uint32_t)(hi))) << 32)) |
| #define SYS2UNIX_TIME(lo, hi) \ |
| (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) |
| |
| /* |
| * Visual Studio 6 does not know __func__ or __FUNCTION__ |
| * The rest of MS compilers use __FUNCTION__, not C99 __func__ |
| */ |
| #if defined(_MSC_VER) && _MSC_VER < 1300 |
| #define STRX(x) #x |
| #define STR(x) STRX(x) |
| #define __func__ "line " STR(__LINE__) |
| #else |
| #define __func__ __FUNCTION__ |
| #endif /* _MSC_VER */ |
| |
| #define ERRNO GetLastError() |
| #define NO_SOCKLEN_T |
| #define SSL_LIB "ssleay32.dll" |
| #define CRYPTO_LIB "libeay32.dll" |
| #define DIRSEP '\\' |
| #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\') |
| #define O_NONBLOCK 0 |
| #define EWOULDBLOCK WSAEWOULDBLOCK |
| #define _POSIX_ |
| #define UINT64_FMT "I64" |
| |
| #define SHUT_WR 1 |
| #define snprintf _snprintf |
| #define vsnprintf _vsnprintf |
| #define sleep(x) Sleep((x) * 1000) |
| |
| #define popen(x, y) _popen(x, y) |
| #define pclose(x) _pclose(x) |
| #define close(x) _close(x) |
| #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) |
| #define RTLD_LAZY 0 |
| #define fseeko(x, y, z) fseek((x), (y), (z)) |
| #define write(x, y, z) _write((x), (y), (unsigned) z) |
| #define read(x, y, z) _read((x), (y), (unsigned) z) |
| #define flockfile(x) (void) 0 |
| #define funlockfile(x) (void) 0 |
| |
| #ifdef HAVE_STRTOUI64 |
| #define strtoull(x, y, z) _strtoui64(x, y, z) |
| #else |
| #define strtoull(x, y, z) strtoul(x, y, z) |
| #endif /* HAVE_STRTOUI64 */ |
| |
| #if !defined(fileno) |
| #define fileno(x) _fileno(x) |
| #endif /* !fileno MINGW #defines fileno */ |
| |
| typedef HANDLE pthread_mutex_t; |
| typedef HANDLE pthread_cond_t; |
| typedef DWORD pthread_t; |
| typedef HANDLE pid_t; |
| |
| struct timespec { |
| long tv_nsec; |
| long tv_sec; |
| }; |
| |
| static int pthread_mutex_lock(pthread_mutex_t *); |
| static int pthread_mutex_unlock(pthread_mutex_t *); |
| |
| #if defined(HAVE_STDINT) |
| #include <stdint.h> |
| #else |
| typedef unsigned int uint32_t; |
| typedef unsigned short uint16_t; |
| #if _MSC_VER > 1200 |
| typedef unsigned __int64 uint64_t; |
| #else |
| /* VC6 cannot cast double to unsigned __int64, needed by print_dir_entry() */ |
| typedef __int64 uint64_t; |
| #endif /* _MSC_VER */ |
| #endif /* HAVE_STDINT */ |
| |
| /* |
| * POSIX dirent interface |
| */ |
| struct dirent { |
| char d_name[FILENAME_MAX]; |
| }; |
| |
| typedef struct DIR { |
| HANDLE handle; |
| WIN32_FIND_DATAW info; |
| struct dirent result; |
| } DIR; |
| |
| #else /* UNIX specific */ |
| #include <sys/wait.h> |
| #include <sys/socket.h> |
| #include <sys/select.h> |
| #include <sys/mman.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <sys/time.h> |
| |
| #include <pwd.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #include <dlfcn.h> |
| #include <pthread.h> |
| #define SSL_LIB "libssl.so" |
| #define CRYPTO_LIB "libcrypto.so" |
| #define DIRSEP '/' |
| #define IS_DIRSEP_CHAR(c) ((c) == '/') |
| #define O_BINARY 0 |
| #define closesocket(a) close(a) |
| #define mg_fopen(x, y) fopen(x, y) |
| #define mg_mkdir(x, y) mkdir(x, y) |
| #define mg_remove(x) remove(x) |
| #define mg_rename(x, y) rename(x, y) |
| #define mg_getcwd(x, y) getcwd(x, y) |
| #define ERRNO errno |
| #define INVALID_SOCKET (-1) |
| #define UINT64_FMT "j" |
| typedef int SOCKET; |
| |
| #endif /* End of Windows and UNIX specific includes */ |
| |
| #include "mongoose.h" |
| |
| #define MONGOOSE_VERSION "2.8" |
| #define PASSWORDS_FILE_NAME ".htpasswd" |
| #define CGI_ENVIRONMENT_SIZE (64 * 1024) |
| #define MAX_CGI_ENVIR_VARS 64 |
| #define MAX_REQUEST_SIZE (64 * 1024) |
| #define MAX_REQUEST_SIZE_PRINT (8 * 1024 * 1024) |
| #define MAX_LISTENING_SOCKETS 10 |
| // Increased from default of 32 |
| #define MAX_CALLBACKS 64 |
| #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
| #define UNKNOWN_CONTENT_LENGTH ((uint64_t) ~0) |
| #define DEBUG_MGS_PREFIX "*** Mongoose debug *** " |
| |
| #if defined(DEBUG) |
| #define DEBUG_TRACE(x) do {printf x; putchar('\n'); fflush(stdout);} while (0) |
| #else |
| #define DEBUG_TRACE(x) |
| #endif /* DEBUG */ |
| |
| /* |
| * Darwin prior to 7.0 and Win32 do not have socklen_t |
| */ |
| #ifdef NO_SOCKLEN_T |
| typedef int socklen_t; |
| #endif /* NO_SOCKLEN_T */ |
| |
| #if !defined(FALSE) |
| enum {FALSE, TRUE}; |
| #endif /* !FALSE */ |
| |
| typedef int bool_t; |
| typedef void * (*mg_thread_func_t)(void *); |
| |
| static const char *http_500_error = "Internal Server Error"; |
| |
| /* |
| * Snatched from OpenSSL includes. I put the prototypes here to be independent |
| * from the OpenSSL source installation. Having this, mongoose + SSL can be |
| * built on any system with binary SSL libraries installed. |
| */ |
| typedef struct ssl_st SSL; |
| typedef struct ssl_method_st SSL_METHOD; |
| typedef struct ssl_ctx_st SSL_CTX; |
| |
| #define SSL_ERROR_WANT_READ 2 |
| #define SSL_ERROR_WANT_WRITE 3 |
| #define SSL_FILETYPE_PEM 1 |
| #define CRYPTO_LOCK 1 |
| |
| /* |
| * Dynamically loaded SSL functionality |
| */ |
| struct ssl_func { |
| const char *name; /* SSL function name */ |
| void (*ptr)(void); /* Function pointer */ |
| }; |
| |
| #define SSL_free(x) (* (void (*)(SSL *)) ssl_sw[0].ptr)(x) |
| #define SSL_accept(x) (* (int (*)(SSL *)) ssl_sw[1].ptr)(x) |
| #define SSL_connect(x) (* (int (*)(SSL *)) ssl_sw[2].ptr)(x) |
| #define SSL_read(x,y,z) (* (int (*)(SSL *, void *, int)) \ |
| ssl_sw[3].ptr)((x),(y),(z)) |
| #define SSL_write(x,y,z) (* (int (*)(SSL *, const void *,int)) \ |
| ssl_sw[4].ptr)((x), (y), (z)) |
| #define SSL_get_error(x,y)(* (int (*)(SSL *, int)) ssl_sw[5])((x), (y)) |
| #define SSL_set_fd(x,y) (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)((x), (y)) |
| #define SSL_new(x) (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)(x) |
| #define SSL_CTX_new(x) (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)(x) |
| #define SSLv23_server_method() (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)() |
| #define SSL_library_init() (* (int (*)(void)) ssl_sw[10].ptr)() |
| #define SSL_CTX_use_PrivateKey_file(x,y,z) (* (int (*)(SSL_CTX *, \ |
| const char *, int)) ssl_sw[11].ptr)((x), (y), (z)) |
| #define SSL_CTX_use_certificate_file(x,y,z) (* (int (*)(SSL_CTX *, \ |
| const char *, int)) ssl_sw[12].ptr)((x), (y), (z)) |
| #define SSL_CTX_set_default_passwd_cb(x,y) \ |
| (* (void (*)(SSL_CTX *, mg_spcb_t)) ssl_sw[13].ptr)((x),(y)) |
| #define SSL_CTX_free(x) (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)(x) |
| |
| #define CRYPTO_num_locks() (* (int (*)(void)) crypto_sw[0].ptr)() |
| #define CRYPTO_set_locking_callback(x) \ |
| (* (void (*)(void (*)(int, int, const char *, int))) \ |
| crypto_sw[1].ptr)(x) |
| #define CRYPTO_set_id_callback(x) \ |
| (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)(x) |
| |
| /* |
| * set_ssl_option() function when called, updates this array. |
| * It loads SSL library dynamically and changes NULLs to the actual addresses |
| * of respective functions. The macros above (like SSL_connect()) are really |
| * just calling these functions indirectly via the pointer. |
| */ |
| static struct ssl_func ssl_sw[] = { |
| {"SSL_free", NULL}, |
| {"SSL_accept", NULL}, |
| {"SSL_connect", NULL}, |
| {"SSL_read", NULL}, |
| {"SSL_write", NULL}, |
| {"SSL_get_error", NULL}, |
| {"SSL_set_fd", NULL}, |
| {"SSL_new", NULL}, |
| {"SSL_CTX_new", NULL}, |
| {"SSLv23_server_method", NULL}, |
| {"SSL_library_init", NULL}, |
| {"SSL_CTX_use_PrivateKey_file", NULL}, |
| {"SSL_CTX_use_certificate_file",NULL}, |
| {"SSL_CTX_set_default_passwd_cb",NULL}, |
| {"SSL_CTX_free", NULL}, |
| {NULL, NULL} |
| }; |
| |
| /* |
| * Similar array as ssl_sw. These functions are located in different lib. |
| */ |
| static struct ssl_func crypto_sw[] = { |
| {"CRYPTO_num_locks", NULL}, |
| {"CRYPTO_set_locking_callback", NULL}, |
| {"CRYPTO_set_id_callback", NULL}, |
| {NULL, NULL} |
| }; |
| |
| /* |
| * Month names |
| */ |
| static const char *month_names[] = { |
| "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| }; |
| |
| /* |
| * Unified socket address. For IPv6 support, add IPv6 address structure |
| * in the union u. |
| */ |
| struct usa { |
| socklen_t len; |
| union { |
| struct sockaddr sa; |
| struct sockaddr_in sin; |
| } u; |
| }; |
| |
| /* |
| * Specifies a string (chunk of memory). |
| * Used to traverse comma separated lists of options. |
| */ |
| struct vec { |
| const char *ptr; |
| size_t len; |
| }; |
| |
| /* |
| * Structure used by mg_stat() function. Uses 64 bit file length. |
| */ |
| struct mgstat { |
| bool_t is_directory; /* Directory marker */ |
| uint64_t size; /* File size */ |
| time_t mtime; /* Modification time */ |
| }; |
| |
| struct mg_option { |
| const char *name; |
| const char *description; |
| const char *default_value; |
| int index; |
| bool_t (*setter)(struct mg_context *, const char *); |
| }; |
| |
| /* |
| * Numeric indexes for the option values in context, ctx->options |
| */ |
| enum mg_option_index { |
| OPT_ROOT, OPT_INDEX_FILES, OPT_PORTS, OPT_DIR_LIST, OPT_CGI_EXTENSIONS, |
| OPT_CGI_INTERPRETER, OPT_CGI_ENV, OPT_SSI_EXTENSIONS, OPT_AUTH_DOMAIN, |
| OPT_AUTH_GPASSWD, OPT_AUTH_PUT, OPT_ACCESS_LOG, OPT_ERROR_LOG, |
| OPT_SSL_CERTIFICATE, OPT_ALIASES, OPT_ACL, OPT_UID, OPT_PROTECT, |
| OPT_SERVICE, OPT_HIDE, OPT_ADMIN_URI, OPT_MAX_THREADS, OPT_IDLE_TIME, |
| OPT_MIME_TYPES, |
| NUM_OPTIONS |
| }; |
| |
| /* |
| * Structure used to describe listening socket, or socket which was |
| * accept()-ed by the master thread and queued for future handling |
| * by the worker thread. |
| */ |
| struct socket { |
| SOCKET sock; /* Listening socket */ |
| struct usa lsa; /* Local socket address */ |
| struct usa rsa; /* Remote socket address */ |
| bool_t is_ssl; /* Is socket SSL-ed */ |
| }; |
| |
| /* |
| * Callback function, and where it is bound to |
| */ |
| struct callback { |
| char *uri_regex; /* URI regex to handle */ |
| mg_callback_t func; /* user callback */ |
| bool_t is_auth; /* func is auth checker */ |
| int status_code; /* error code to handle */ |
| void *user_data; /* opaque user data */ |
| }; |
| |
| /* |
| * Mongoose context |
| */ |
| struct mg_context { |
| int stop_flag; /* Should we stop event loop */ |
| SSL_CTX *ssl_ctx; /* SSL context */ |
| |
| FILE *access_log; /* Opened access log */ |
| FILE *error_log; /* Opened error log */ |
| |
| struct socket listeners[MAX_LISTENING_SOCKETS]; |
| int num_listeners; |
| |
| struct callback callbacks[MAX_CALLBACKS]; |
| int num_callbacks; |
| |
| char *options[NUM_OPTIONS]; /* Configured opions */ |
| pthread_mutex_t opt_mutex[NUM_OPTIONS]; /* Option protector */ |
| |
| int max_threads; /* Maximum number of threads */ |
| int num_threads; /* Number of threads */ |
| int num_idle; /* Number of idle threads */ |
| pthread_mutex_t thr_mutex; /* Protects (max|num)_threads */ |
| pthread_cond_t thr_cond; |
| pthread_mutex_t bind_mutex; /* Protects bind operations */ |
| |
| struct socket queue[20]; /* Accepted sockets */ |
| int sq_head; /* Head of the socket queue */ |
| int sq_tail; /* Tail of the socket queue */ |
| pthread_cond_t empty_cond; /* Socket queue empty condvar */ |
| pthread_cond_t full_cond; /* Socket queue full condvar */ |
| |
| mg_spcb_t ssl_password_callback; |
| mg_callback_t log_callback; |
| }; |
| |
| /* |
| * Client connection. |
| */ |
| struct mg_connection { |
| struct mg_request_info request_info; |
| struct mg_context *ctx; /* Mongoose context we belong to*/ |
| SSL *ssl; /* SSL descriptor */ |
| struct socket client; /* Connected client */ |
| time_t birth_time; /* Time connection was accepted */ |
| bool_t free_post_data; /* post_data was malloc-ed */ |
| bool_t embedded_auth; /* Used for authorization */ |
| uint64_t num_bytes_sent; /* Total bytes sent to client */ |
| }; |
| |
| /* |
| * Print error message to the opened error log stream. |
| */ |
| static void |
| cry(struct mg_connection *conn, const char *fmt, ...) |
| { |
| char buf[BUFSIZ]; |
| va_list ap; |
| |
| va_start(ap, fmt); |
| (void) vsnprintf(buf, sizeof(buf), fmt, ap); |
| conn->ctx->log_callback(conn, &conn->request_info, buf); |
| va_end(ap); |
| } |
| |
| /* |
| * Return fake connection structure. Used for logging, if connection |
| * is not applicable at the moment of logging. |
| */ |
| static struct mg_connection * |
| fc(struct mg_context *ctx) |
| { |
| static struct mg_connection fake_connection; |
| fake_connection.ctx = ctx; |
| return (&fake_connection); |
| } |
| |
| /* |
| * If an embedded code does not intercept logging by calling |
| * mg_set_log_callback(), this function is used for logging. It prints |
| * stuff to the conn->error_log, which is stderr unless "error_log" |
| * option was set. |
| */ |
| static void |
| builtin_error_log(struct mg_connection *conn, |
| const struct mg_request_info *request_info, void *message) |
| { |
| FILE *fp; |
| time_t timestamp; |
| |
| fp = conn->ctx->error_log; |
| flockfile(fp); |
| |
| timestamp = time(NULL); |
| |
| (void) fprintf(fp, |
| "[%010lu] [error] [client %s] ", |
| (unsigned long) timestamp, |
| inet_ntoa(conn->client.rsa.u.sin.sin_addr)); |
| |
| if (request_info->request_method != NULL) |
| (void) fprintf(fp, "%s %s: ", |
| request_info->request_method, |
| request_info->uri); |
| |
| (void) fprintf(fp, "%s", (char *) message); |
| |
| fputc('\n', fp); |
| |
| funlockfile(fp); |
| } |
| |
| const char * |
| mg_version(void) |
| { |
| return (MONGOOSE_VERSION); |
| } |
| |
| static void |
| mg_strlcpy(register char *dst, register const char *src, size_t n) |
| { |
| for (; *src != '\0' && n > 1; n--) |
| *dst++ = *src++; |
| *dst = '\0'; |
| } |
| |
| static int |
| lowercase(const char *s) |
| { |
| return (tolower(* (unsigned char *) s)); |
| } |
| |
| static int |
| mg_strncasecmp(const char *s1, const char *s2, size_t len) |
| { |
| int diff = 0; |
| |
| if (len > 0) |
| do { |
| diff = lowercase(s1++) - lowercase(s2++); |
| } while (diff == 0 && s1[-1] != '\0' && --len > 0); |
| |
| return (diff); |
| } |
| |
| static int |
| mg_strcasecmp(const char *s1, const char *s2) |
| { |
| int diff; |
| |
| do { |
| diff = lowercase(s1++) - lowercase(s2++); |
| } while (diff == 0 && s1[-1] != '\0'); |
| |
| return (diff); |
| } |
| |
| static char * |
| mg_strndup(const char *ptr, size_t len) |
| { |
| char *p; |
| |
| if ((p = (char *) malloc(len + 1)) != NULL) |
| mg_strlcpy(p, ptr, len + 1); |
| |
| return (p); |
| |
| } |
| |
| static char * |
| mg_strdup(const char *str) |
| { |
| return (mg_strndup(str, strlen(str))); |
| } |
| |
| /* |
| * Like snprintf(), but never returns negative value, or the value |
| * that is larger than a supplied buffer. |
| * Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability |
| * in his audit report. |
| */ |
| static int |
| mg_vsnprintf(struct mg_connection *conn, |
| char *buf, size_t buflen, const char *fmt, va_list ap) |
| { |
| int n; |
| |
| if (buflen == 0) |
| return (0); |
| |
| n = vsnprintf(buf, buflen, fmt, ap); |
| |
| if (n < 0) { |
| cry(conn, "vsnprintf error"); |
| n = 0; |
| } else if (n >= (int) buflen) { |
| cry(conn, "truncating vsnprintf buffer: [%.*s]", |
| n > 200 ? 200 : n, buf); |
| n = (int) buflen - 1; |
| } |
| buf[n] = '\0'; |
| |
| return (n); |
| } |
| |
| static int |
| mg_snprintf(struct mg_connection *conn, |
| char *buf, size_t buflen, const char *fmt, ...) |
| { |
| va_list ap; |
| int n; |
| |
| va_start(ap, fmt); |
| n = mg_vsnprintf(conn, buf, buflen, fmt, ap); |
| va_end(ap); |
| |
| return (n); |
| } |
| |
| /* |
| * Convert string representing a boolean value to a boolean value |
| */ |
| static bool_t |
| is_true(const char *str) |
| { |
| static const char *trues[] = {"1", "yes", "true", "ja", NULL}; |
| int i; |
| |
| for (i = 0; trues[i] != NULL; i++) |
| if (str != NULL && mg_strcasecmp(str, trues[i]) == 0) |
| return (TRUE); |
| |
| return (FALSE); |
| } |
| |
| /* |
| * Skip the characters until one of the delimiters characters found. |
| * 0-terminate resulting word. Skip the rest of the delimiters if any. |
| * Advance pointer to buffer to the next word. Return found 0-terminated word. |
| */ |
| static char * |
| skip(char **buf, const char *delimiters) |
| { |
| char *p, *begin_word, *end_word, *end_delimiters; |
| |
| begin_word = *buf; |
| end_word = begin_word + strcspn(begin_word, delimiters); |
| end_delimiters = end_word + strspn(end_word, delimiters); |
| |
| for (p = end_word; p < end_delimiters; p++) |
| *p = '\0'; |
| |
| *buf = end_delimiters; |
| |
| return (begin_word); |
| } |
| |
| /* |
| * Return HTTP header value, or NULL if not found. |
| */ |
| static const char * |
| get_header(const struct mg_request_info *ri, const char *name) |
| { |
| int i; |
| |
| for (i = 0; i < ri->num_headers; i++) |
| if (!mg_strcasecmp(name, ri->http_headers[i].name)) |
| return (ri->http_headers[i].value); |
| |
| return (NULL); |
| } |
| |
| const char * |
| mg_get_header(const struct mg_connection *conn, const char *name) |
| { |
| return (get_header(&conn->request_info, name)); |
| } |
| |
| /* |
| * A helper function for traversing comma separated list of values. |
| * It returns a list pointer shifted to the next value, of NULL if the end |
| * of the list found. |
| * Value is stored in val vector. If value has form "x=y", then eq_val |
| * vector is initialized to point to the "y" part, and val vector length |
| * is adjusted to point only to "x". |
| */ |
| static const char * |
| next_option(const char *list, struct vec *val, struct vec *eq_val) |
| { |
| if (list == NULL || *list == '\0') { |
| /* End of the list */ |
| list = NULL; |
| } else { |
| val->ptr = list; |
| if ((list = strchr(val->ptr, ',')) != NULL) { |
| /* Comma found. Store length and shift the list ptr */ |
| val->len = list - val->ptr; |
| list++; |
| } else { |
| /* This value is the last one */ |
| list = val->ptr + strlen(val->ptr); |
| val->len = list - val->ptr; |
| } |
| |
| if (eq_val != NULL) { |
| /* |
| * Value has form "x=y", adjust pointers and lengths |
| * so that val points to "x", and eq_val points to "y". |
| */ |
| eq_val->len = 0; |
| eq_val->ptr = memchr(val->ptr, '=', val->len); |
| if (eq_val->ptr != NULL) { |
| eq_val->ptr++; /* Skip over '=' character */ |
| eq_val->len = val->ptr + val->len - eq_val->ptr; |
| val->len = (eq_val->ptr - val->ptr) - 1; |
| } |
| } |
| } |
| |
| return (list); |
| } |
| |
| #if !(defined(NO_CGI) && defined(NO_SSI)) |
| /* |
| * Verify that given file has certain extension |
| */ |
| static bool_t |
| match_extension(const char *path, const char *ext_list) |
| { |
| struct vec ext_vec; |
| size_t path_len; |
| |
| path_len = strlen(path); |
| |
| while ((ext_list = next_option(ext_list, &ext_vec, NULL)) != NULL) |
| if (ext_vec.len < path_len && |
| mg_strncasecmp(path + path_len - ext_vec.len, |
| ext_vec.ptr, ext_vec.len) == 0) |
| return (TRUE); |
| |
| return (FALSE); |
| } |
| #endif /* !(NO_CGI && NO_SSI) */ |
| |
| /* |
| * Return TRUE if "uri" matches "regexp". |
| * '*' in the regexp means zero or more characters. |
| */ |
| static bool_t |
| match_regex(const char *uri, const char *regexp) |
| { |
| if (*regexp == '\0') |
| return (*uri == '\0'); |
| |
| if (*regexp == '*') |
| do { |
| if (match_regex(uri, regexp + 1)) |
| return (TRUE); |
| } while (*uri++ != '\0'); |
| |
| if (*uri != '\0' && *regexp == *uri) |
| return (match_regex(uri + 1, regexp + 1)); |
| |
| return (FALSE); |
| } |
| |
| static const struct callback * |
| find_callback(struct mg_context *ctx, bool_t is_auth, |
| const char *uri, int status_code) |
| { |
| const struct callback *cb, *found; |
| int i; |
| |
| found = NULL; |
| pthread_mutex_lock(&ctx->bind_mutex); |
| for (i = 0; i < ctx->num_callbacks; i++) { |
| cb = ctx->callbacks + i; |
| if ((uri != NULL && cb->uri_regex != NULL && |
| ((is_auth && cb->is_auth) || (!is_auth && !cb->is_auth)) && |
| match_regex(uri, cb->uri_regex)) || (uri == NULL && |
| (cb->status_code == 0 || |
| cb->status_code == status_code))) { |
| found = cb; |
| break; |
| } |
| } |
| pthread_mutex_unlock(&ctx->bind_mutex); |
| |
| return (found); |
| } |
| |
| /* |
| * For use by external application. This sets custom logging function. |
| */ |
| void |
| mg_set_log_callback(struct mg_context *ctx, mg_callback_t log_callback) |
| { |
| /* If NULL is specified as a callback, revert back to the default */ |
| if (log_callback == NULL) |
| ctx->log_callback = &builtin_error_log; |
| else |
| ctx->log_callback = log_callback; |
| } |
| |
| /* |
| * Send error message back to the client. |
| */ |
| static void |
| send_error(struct mg_connection *conn, int status, const char *reason, |
| const char *fmt, ...) |
| { |
| const struct callback *cb; |
| char buf[BUFSIZ]; |
| va_list ap; |
| int len; |
| |
| conn->request_info.status_code = status; |
| |
| /* If error handler is set, call it. Otherwise, send error message */ |
| if ((cb = find_callback(conn->ctx, FALSE, NULL, status)) != NULL) { |
| cb->func(conn, &conn->request_info, cb->user_data); |
| } else { |
| buf[0] = '\0'; |
| len = 0; |
| |
| /* Errors 1xx, 204 and 304 MUST NOT send a body */ |
| if (status > 199 && status != 204 && status != 304) { |
| len = mg_snprintf(conn, buf, sizeof(buf), |
| "Error %d: %s\n", status, reason); |
| cry(conn, "%s", buf); |
| |
| va_start(ap, fmt); |
| len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, |
| fmt, ap); |
| va_end(ap); |
| conn->num_bytes_sent = len; |
| } |
| |
| (void) mg_printf(conn, |
| "HTTP/1.1 %d %s\r\n" |
| "Content-Type: text/plain\r\n" |
| "Content-Length: %d\r\n" |
| "Connection: close\r\n" |
| "\r\n%s", status, reason, len, buf); |
| } |
| } |
| |
| #ifdef _WIN32 |
| static int |
| pthread_mutex_init(pthread_mutex_t *mutex, void *unused) |
| { |
| unused = NULL; |
| *mutex = CreateMutex(NULL, FALSE, NULL); |
| return (*mutex == NULL ? -1 : 0); |
| } |
| |
| static int |
| pthread_mutex_destroy(pthread_mutex_t *mutex) |
| { |
| return (CloseHandle(*mutex) == 0 ? -1 : 0); |
| } |
| |
| static int |
| pthread_mutex_lock(pthread_mutex_t *mutex) |
| { |
| return (WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1); |
| } |
| |
| static int |
| pthread_mutex_unlock(pthread_mutex_t *mutex) |
| { |
| return (ReleaseMutex(*mutex) == 0 ? -1 : 0); |
| } |
| |
| static int |
| pthread_cond_init(pthread_cond_t *cv, const void *unused) |
| { |
| unused = NULL; |
| *cv = CreateEvent(NULL, FALSE, FALSE, NULL); |
| return (*cv == NULL ? -1 : 0); |
| } |
| |
| static int |
| pthread_cond_timedwait(pthread_cond_t *cv, pthread_mutex_t *mutex, |
| const struct timespec *ts) |
| { |
| DWORD status; |
| DWORD msec = INFINITE; |
| time_t now; |
| |
| if (ts != NULL) { |
| now = time(NULL); |
| msec = (DWORD)(1000 * (now > ts->tv_sec ? 0 : ts->tv_sec - now)); |
| } |
| |
| (void) ReleaseMutex(*mutex); |
| status = WaitForSingleObject(*cv, msec); |
| (void) WaitForSingleObject(*mutex, INFINITE); |
| |
| return (status == WAIT_OBJECT_0 ? 0 : -1); |
| } |
| |
| static int |
| pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) |
| { |
| return (pthread_cond_timedwait(cv, mutex, NULL)); |
| } |
| |
| static int |
| pthread_cond_signal(pthread_cond_t *cv) |
| { |
| return (SetEvent(*cv) == 0 ? -1 : 0); |
| } |
| |
| static int |
| pthread_cond_destroy(pthread_cond_t *cv) |
| { |
| return (CloseHandle(*cv) == 0 ? -1 : 0); |
| } |
| |
| static pthread_t |
| pthread_self(void) |
| { |
| return (GetCurrentThreadId()); |
| } |
| |
| /* |
| * Change all slashes to backslashes. It is Windows. |
| */ |
| static void |
| fix_directory_separators(char *path) |
| { |
| int i; |
| |
| for (i = 0; path[i] != '\0'; i++) { |
| if (path[i] == '/') |
| path[i] = '\\'; |
| /* i > 0 check is to preserve UNC paths, \\server\file.txt */ |
| if (path[i] == '\\' && i > 0) |
| while (path[i + 1] == '\\' || path[i + 1] == '/') |
| (void) memmove(path + i + 1, |
| path + i + 2, strlen(path + i + 1)); |
| } |
| } |
| |
| /* |
| * Encode 'path' which is assumed UTF-8 string, into UNICODE string. |
| * wbuf and wbuf_len is a target buffer and its length. |
| */ |
| static void |
| to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) |
| { |
| char buf[FILENAME_MAX], *p; |
| |
| mg_strlcpy(buf, path, sizeof(buf)); |
| fix_directory_separators(buf); |
| |
| /* Point p to the end of the file name */ |
| p = buf + strlen(buf) - 1; |
| |
| /* Trim trailing backslash character */ |
| while (p > buf && *p == '\\' && p[-1] != ':') |
| *p-- = '\0'; |
| |
| /* |
| * Protect from CGI code disclosure. |
| * This is very nasty hole. Windows happily opens files with |
| * some garbage in the end of file name. So fopen("a.cgi ", "r") |
| * actually opens "a.cgi", and does not return an error! |
| */ |
| if (*p == 0x20 || *p == 0x2e || *p == 0x2b || (*p & ~0x7f)) { |
| (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf); |
| buf[0] = '\0'; |
| } |
| |
| (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); |
| } |
| |
| #if defined(_WIN32_WCE) |
| |
| static time_t |
| time(time_t *ptime) |
| { |
| time_t t; |
| SYSTEMTIME st; |
| FILETIME ft; |
| |
| GetSystemTime(&st); |
| SystemTimeToFileTime(&st, &ft); |
| t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); |
| |
| if (ptime != NULL) |
| *ptime = t; |
| |
| return (t); |
| } |
| |
| static time_t |
| mktime(struct tm *ptm) |
| { |
| SYSTEMTIME st; |
| FILETIME ft, lft; |
| |
| st.wYear = ptm->tm_year + 1900; |
| st.wMonth = ptm->tm_mon + 1; |
| st.wDay = ptm->tm_mday; |
| st.wHour = ptm->tm_hour; |
| st.wMinute = ptm->tm_min; |
| st.wSecond = ptm->tm_sec; |
| st.wMilliseconds = 0; |
| |
| SystemTimeToFileTime(&st, &ft); |
| LocalFileTimeToFileTime(&ft, &lft); |
| return (time_t)((MAKEUQUAD(lft.dwLowDateTime, lft.dwHighDateTime) - |
| EPOCH_DIFF) / RATE_DIFF); |
| } |
| |
| static struct tm * |
| localtime(const time_t *ptime, struct tm *ptm) |
| { |
| uint64_t t = ((uint64_t)*ptime) * RATE_DIFF + EPOCH_DIFF; |
| FILETIME ft, lft; |
| SYSTEMTIME st; |
| TIME_ZONE_INFORMATION tzinfo; |
| |
| if (ptm == NULL) |
| return NULL; |
| |
| * (uint64_t *) &ft = t; |
| FileTimeToLocalFileTime(&ft, &lft); |
| FileTimeToSystemTime(&lft, &st); |
| ptm->tm_year = st.wYear - 1900; |
| ptm->tm_mon = st.wMonth - 1; |
| ptm->tm_wday = st.wDayOfWeek; |
| ptm->tm_mday = st.wDay; |
| ptm->tm_hour = st.wHour; |
| ptm->tm_min = st.wMinute; |
| ptm->tm_sec = st.wSecond; |
| ptm->tm_yday = 0; // hope nobody uses this |
| ptm->tm_isdst = ((GetTimeZoneInformation(&tzinfo) == |
| TIME_ZONE_ID_DAYLIGHT) ? 1 : 0); |
| |
| return ptm; |
| } |
| |
| static size_t |
| strftime(char *dst, size_t dst_size, const char *fmt, const struct tm *tm) |
| { |
| (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); |
| return (0); |
| |
| #endif |
| |
| static int |
| mg_rename(const char* oldname, const char* newname) |
| { |
| wchar_t woldbuf[FILENAME_MAX]; |
| wchar_t wnewbuf[FILENAME_MAX]; |
| |
| to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf)); |
| to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf)); |
| |
| return (MoveFileW(woldbuf, wnewbuf) ? 0 : -1); |
| } |
| |
| |
| static FILE * |
| mg_fopen(const char *path, const char *mode) |
| { |
| wchar_t wbuf[FILENAME_MAX], wmode[20]; |
| |
| to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
| MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); |
| |
| return (_wfopen(wbuf, wmode)); |
| } |
| |
| static int |
| mg_stat(const char *path, struct mgstat *stp) |
| { |
| int ok = -1; /* Error */ |
| wchar_t wbuf[FILENAME_MAX]; |
| WIN32_FILE_ATTRIBUTE_DATA info; |
| |
| to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
| |
| if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { |
| stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); |
| stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime, |
| info.ftLastWriteTime.dwHighDateTime); |
| stp->is_directory = |
| info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; |
| ok = 0; /* Success */ |
| } |
| |
| return (ok); |
| } |
| |
| static int |
| mg_remove(const char *path) |
| { |
| wchar_t wbuf[FILENAME_MAX]; |
| |
| to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
| |
| return (DeleteFileW(wbuf) ? 0 : -1); |
| } |
| |
| static int |
| mg_mkdir(const char *path, int mode) |
| { |
| char buf[FILENAME_MAX]; |
| wchar_t wbuf[FILENAME_MAX]; |
| |
| mode = 0; /* Unused */ |
| mg_strlcpy(buf, path, sizeof(buf)); |
| fix_directory_separators(buf); |
| |
| (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf)); |
| |
| return (CreateDirectoryW(wbuf, NULL) ? 0 : -1); |
| } |
| |
| static char * |
| mg_getcwd(char *buf, int buf_len) |
| { |
| wchar_t wbuf[FILENAME_MAX], *basename; |
| |
| if (GetModuleFileNameW(NULL, wbuf, ARRAY_SIZE(wbuf))) { |
| if ((basename = wcsrchr(wbuf, DIRSEP)) != NULL) { |
| *basename = L'\0'; |
| if (WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, buf, |
| buf_len, NULL, NULL) > 0) |
| return (buf); |
| } |
| } |
| |
| return (NULL); |
| } |
| |
| /* |
| * Implementation of POSIX opendir/closedir/readdir for Windows. |
| */ |
| static DIR * |
| opendir(const char *name) |
| { |
| DIR *dir = NULL; |
| wchar_t wpath[FILENAME_MAX]; |
| DWORD attrs; |
| |
| if (name == NULL) { |
| SetLastError(ERROR_BAD_ARGUMENTS); |
| } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { |
| SetLastError(ERROR_NOT_ENOUGH_MEMORY); |
| } else { |
| to_unicode(name, wpath, ARRAY_SIZE(wpath)); |
| attrs = GetFileAttributesW(wpath); |
| if (attrs != 0xFFFFFFFF && |
| ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { |
| (void) wcscat(wpath, L"\\*"); |
| dir->handle = FindFirstFileW(wpath, &dir->info); |
| dir->result.d_name[0] = '\0'; |
| } else { |
| free(dir); |
| dir = NULL; |
| } |
| } |
| |
| return (dir); |
| } |
| |
| static int |
| closedir(DIR *dir) |
| { |
| int result = 0; |
| |
| if (dir != NULL) { |
| if (dir->handle != INVALID_HANDLE_VALUE) |
| result = FindClose(dir->handle) ? 0 : -1; |
| |
| free(dir); |
| } else { |
| result = -1; |
| SetLastError(ERROR_BAD_ARGUMENTS); |
| } |
| |
| return (result); |
| } |
| |
| struct dirent * |
| readdir(DIR *dir) |
| { |
| struct dirent *result = 0; |
| |
| if (dir) { |
| if (dir->handle != INVALID_HANDLE_VALUE) { |
| result = &dir->result; |
| (void) WideCharToMultiByte(CP_UTF8, 0, |
| dir->info.cFileName, -1, result->d_name, |
| sizeof(result->d_name), NULL, NULL); |
| |
| if (!FindNextFileW(dir->handle, &dir->info)) { |
| (void) FindClose(dir->handle); |
| dir->handle = INVALID_HANDLE_VALUE; |
| } |
| |
| } else { |
| SetLastError(ERROR_FILE_NOT_FOUND); |
| } |
| } else { |
| SetLastError(ERROR_BAD_ARGUMENTS); |
| } |
| |
| return (result); |
| } |
| |
| #define set_close_on_exec(fd) /* No FD_CLOEXEC on Windows */ |
| |
| static int |
| start_thread(struct mg_context *ctx, mg_thread_func_t func, void *param) |
| { |
| HANDLE hThread; |
| |
| ctx = NULL; /* Unused */ |
| |
| hThread = CreateThread(NULL, 0, |
| (LPTHREAD_START_ROUTINE) func, param, 0, NULL); |
| |
| if (hThread != NULL) |
| (void) CloseHandle(hThread); |
| |
| return (hThread == NULL ? -1 : 0); |
| } |
| |
| static HANDLE |
| dlopen(const char *dll_name, int flags) |
| { |
| wchar_t wbuf[FILENAME_MAX]; |
| |
| flags = 0; /* Unused */ |
| to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); |
| |
| return (LoadLibraryW(wbuf)); |
| } |
| |
| #if !defined(NO_CGI) |
| static int |
| kill(pid_t pid, int sig_num) |
| { |
| (void) TerminateProcess(pid, sig_num); |
| (void) CloseHandle(pid); |
| return (0); |
| } |
| |
| static pid_t |
| spawn_process(struct mg_connection *conn, const char *prog, char *envblk, |
| char *envp[], int fd_stdin, int fd_stdout, const char *dir) |
| { |
| HANDLE me; |
| char *p, *interp, cmdline[FILENAME_MAX], line[FILENAME_MAX]; |
| FILE *fp; |
| STARTUPINFOA si; |
| PROCESS_INFORMATION pi; |
| |
| envp = NULL; /* Unused */ |
| |
| (void) memset(&si, 0, sizeof(si)); |
| (void) memset(&pi, 0, sizeof(pi)); |
| |
| /* XXX redirect CGI errors to the error log file */ |
| si.cb = sizeof(si); |
| si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
| si.wShowWindow = SW_HIDE; |
| |
| me = GetCurrentProcess(); |
| (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me, |
| &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
| (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me, |
| &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
| |
| /* If CGI file is a script, try to read the interpreter line */ |
| interp = conn->ctx->options[OPT_CGI_INTERPRETER]; |
| if (interp == NULL) { |
| line[2] = '\0'; |
| (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", |
| dir, DIRSEP, prog); |
| if ((fp = fopen(cmdline, "r")) != NULL) { |
| (void) fgets(line, sizeof(line), fp); |
| if (memcmp(line, "#!", 2) != 0) |
| line[2] = '\0'; |
| /* Trim whitespaces from interpreter name */ |
| for (p = &line[strlen(line) - 1]; p > line && |
| isspace(*p); p--) |
| *p = '\0'; |
| (void) fclose(fp); |
| } |
| interp = line + 2; |
| } |
| |
| if ((p = (char *) strrchr(prog, '/')) != NULL) |
| prog = p + 1; |
| |
| (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s", |
| interp, interp[0] == '\0' ? "" : " ", prog); |
| |
| (void) mg_snprintf(conn, line, sizeof(line), "%s", dir); |
| fix_directory_separators(line); |
| |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: Running [%s]", __func__, cmdline)); |
| if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, |
| CREATE_NEW_PROCESS_GROUP, envblk, line, &si, &pi) == 0) { |
| cry(conn, "%s: CreateProcess(%s): %d", |
| __func__, cmdline, ERRNO); |
| pi.hProcess = (pid_t) -1; |
| } else { |
| (void) close(fd_stdin); |
| (void) close(fd_stdout); |
| } |
| |
| (void) CloseHandle(si.hStdOutput); |
| (void) CloseHandle(si.hStdInput); |
| (void) CloseHandle(pi.hThread); |
| |
| return ((pid_t) pi.hProcess); |
| } |
| |
| static int |
| pipe(int *fds) |
| { |
| return (_pipe(fds, BUFSIZ, _O_BINARY)); |
| } |
| #endif /* !NO_CGI */ |
| |
| static int |
| set_non_blocking_mode(struct mg_connection *conn, SOCKET sock) |
| { |
| unsigned long on = 1; |
| |
| conn = NULL; /* unused */ |
| return (ioctlsocket(sock, FIONBIO, &on)); |
| } |
| |
| #else |
| |
| static int |
| mg_stat(const char *path, struct mgstat *stp) |
| { |
| struct stat st; |
| int ok; |
| |
| if (stat(path, &st) == 0) { |
| ok = 0; |
| stp->size = st.st_size; |
| stp->mtime = st.st_mtime; |
| stp->is_directory = S_ISDIR(st.st_mode); |
| } else { |
| ok = -1; |
| } |
| |
| return (ok); |
| } |
| |
| static void |
| set_close_on_exec(int fd) |
| { |
| (void) fcntl(fd, F_SETFD, FD_CLOEXEC); |
| } |
| |
| static int |
| start_thread(struct mg_context *ctx, mg_thread_func_t func, void *param) |
| { |
| pthread_t thread_id; |
| pthread_attr_t attr; |
| int retval; |
| |
| (void) pthread_attr_init(&attr); |
| (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
| |
| if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) |
| cry(fc(ctx), "%s: %s", __func__, strerror(retval)); |
| |
| return (retval); |
| } |
| |
| #ifndef NO_CGI |
| static pid_t |
| spawn_process(struct mg_connection *conn, const char *prog, char *envblk, |
| char *envp[], int fd_stdin, int fd_stdout, const char *dir) |
| { |
| pid_t pid; |
| const char *interp; |
| |
| envblk = NULL; /* unused */ |
| |
| if ((pid = fork()) == -1) { |
| /* Parent */ |
| send_error(conn, 500, http_500_error, |
| "fork(): %s", strerror(ERRNO)); |
| } else if (pid == 0) { |
| /* Child */ |
| if (chdir(dir) != 0) { |
| cry(conn, "%s: chdir(%s): %s", |
| __func__, dir, strerror(ERRNO)); |
| } else if (dup2(fd_stdin, 0) == -1) { |
| cry(conn, "%s: dup2(stdin, %d): %s", |
| __func__, fd_stdin, strerror(ERRNO)); |
| } else if (dup2(fd_stdout, 1) == -1) { |
| cry(conn, "%s: dup2(stdout, %d): %s", |
| __func__, fd_stdout, strerror(ERRNO)); |
| } else { |
| /* If error file is specified, send errors there */ |
| if (conn->ctx->error_log != NULL) |
| (void) dup2(fileno(conn->ctx->error_log), 2); |
| |
| (void) close(fd_stdin); |
| (void) close(fd_stdout); |
| |
| /* Execute CGI program */ |
| interp = conn->ctx->options[OPT_CGI_INTERPRETER]; |
| if (interp == NULL) { |
| (void) execle(prog, prog, NULL, envp); |
| cry(conn, "%s: execle(%s): %s", |
| __func__, prog, strerror(ERRNO)); |
| } else { |
| (void) execle(interp, interp, prog, NULL, envp); |
| cry(conn, "%s: execle(%s %s): %s", |
| __func__, interp, prog, strerror(ERRNO)); |
| } |
| } |
| exit(EXIT_FAILURE); |
| } else { |
| /* Parent. Close stdio descriptors */ |
| (void) close(fd_stdin); |
| (void) close(fd_stdout); |
| } |
| |
| return (pid); |
| } |
| #endif /* !NO_CGI */ |
| |
| static int |
| set_non_blocking_mode(struct mg_connection *conn, SOCKET sock) |
| { |
| int flags, ok = -1; |
| |
| if ((flags = fcntl(sock, F_GETFL, 0)) == -1) { |
| cry(conn, "%s: fcntl(F_GETFL): %d", __func__, ERRNO); |
| } else if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) != 0) { |
| cry(conn, "%s: fcntl(F_SETFL): %d", __func__, ERRNO); |
| } else { |
| ok = 0; /* Success */ |
| } |
| |
| return (ok); |
| } |
| #endif /* _WIN32 */ |
| |
| static void |
| lock_option(struct mg_context *ctx, int opt_index) |
| { |
| if (pthread_mutex_lock(&ctx->opt_mutex[opt_index]) != 0) |
| cry(fc(ctx), "pthread_mutex_lock: %s", strerror(ERRNO)); |
| } |
| |
| static void |
| unlock_option(struct mg_context *ctx, int opt_index) |
| { |
| if (pthread_mutex_unlock(&ctx->opt_mutex[opt_index]) != 0) |
| cry(fc(ctx), "pthread_mutex_unlock: %s", strerror(ERRNO)); |
| } |
| |
| /* |
| * Write data to the IO channel - opened file descriptor, socket or SSL |
| * descriptor. Return number of bytes written. |
| */ |
| static uint64_t |
| push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, uint64_t len) |
| { |
| uint64_t sent; |
| int n, k; |
| |
| sent = 0; |
| while (sent < len) { |
| |
| /* How many bytes we send in this iteration */ |
| k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); |
| |
| if (ssl != NULL) { |
| n = SSL_write(ssl, buf + sent, k); |
| } else if (fp != NULL) { |
| n = fwrite(buf + sent, 1, k, fp); |
| if (ferror(fp)) |
| n = -1; |
| } else { |
| n = send(sock, buf + sent, k, 0); |
| } |
| |
| if (n < 0) |
| break; |
| |
| sent += n; |
| } |
| |
| return (sent); |
| } |
| |
| /* |
| * Read from IO channel - opened file descriptor, socket, or SSL descriptor. |
| * Return number of bytes read. |
| */ |
| static int |
| pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) |
| { |
| int nread; |
| |
| if (ssl != NULL) { |
| nread = SSL_read(ssl, buf, len); |
| } else if (fp != NULL) { |
| nread = fread(buf, 1, (size_t) len, fp); |
| if (ferror(fp)) |
| nread = -1; |
| } else { |
| nread = recv(sock, buf, (size_t) len, 0); |
| } |
| |
| return (nread); |
| } |
| |
| int |
| mg_write(struct mg_connection *conn, const void *buf, int len) |
| { |
| assert(len >= 0); |
| return ((int) push(NULL, conn->client.sock, conn->ssl, |
| (const char *) buf, (uint64_t) len)); |
| } |
| |
| int |
| mg_printf(struct mg_connection *conn, const char *fmt, ...) |
| { |
| char* buf; |
| int len, result; |
| va_list ap; |
| int buffer_length = sizeof(char) * MAX_REQUEST_SIZE_PRINT; |
| |
| buf = (char*) malloc(buffer_length); |
| va_start(ap, fmt); |
| len = mg_vsnprintf(conn, buf, buffer_length, fmt, ap); |
| va_end(ap); |
| |
| result = mg_write(conn, buf, len); |
| free(buf); |
| return result; |
| } |
| |
| /* |
| * Return content length of the request, or UNKNOWN_CONTENT_LENGTH constant if |
| * Content-Length header is not set. |
| */ |
| static uint64_t |
| get_content_length(const struct mg_connection *conn) |
| { |
| const char *cl = mg_get_header(conn, "Content-Length"); |
| return (cl == NULL ? UNKNOWN_CONTENT_LENGTH : strtoull(cl, NULL, 10)); |
| } |
| |
| /* |
| * URL-decode input buffer into destination buffer. |
| * 0-terminate the destination buffer. Return the length of decoded data. |
| * form-url-encoded data differs from URI encoding in a way that it |
| * uses '+' as character for space, see RFC 1866 section 8.2.1 |
| * http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt |
| */ |
| static size_t |
| url_decode(const char *src, size_t src_len, char *dst, size_t dst_len, |
| bool_t is_form_url_encoded) |
| { |
| size_t i, j; |
| int a, b; |
| #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') |
| |
| for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { |
| if (src[i] == '%' && |
| isxdigit(* (unsigned char *) (src + i + 1)) && |
| isxdigit(* (unsigned char *) (src + i + 2))) { |
| a = tolower(* (unsigned char *) (src + i + 1)); |
| b = tolower(* (unsigned char *) (src + i + 2)); |
| dst[j] = ((HEXTOI(a) << 4) | HEXTOI(b)) & 0xff; |
| i += 2; |
| } else if (is_form_url_encoded && src[i] == '+') { |
| dst[j] = ' '; |
| } else { |
| dst[j] = src[i]; |
| } |
| } |
| |
| dst[j] = '\0'; /* Null-terminate the destination */ |
| |
| return (j); |
| } |
| |
| /* |
| * Search for a form variable in a given buffer. |
| * Semantic is the same as for mg_get_var(). |
| */ |
| static char * |
| get_var(const char *name, const char *buf, size_t buf_len) |
| { |
| const char *p, *e, *s; |
| char *val; |
| size_t var_len, len; |
| |
| var_len = strlen(name); |
| e = buf + buf_len; |
| val = NULL; |
| |
| /* buf is "var1=val1&var2=val2...". Find variable first */ |
| for (p = buf; p + var_len < e; p++) |
| if ((p == buf || p[-1] == '&') && p[var_len] == '=' && |
| !mg_strncasecmp(name, p, var_len)) { |
| |
| /* Point p to variable value */ |
| p += var_len + 1; |
| |
| /* Point s to the end of the value */ |
| s = (const char *) memchr(p, '&', e - p); |
| if (s == NULL) |
| s = e; |
| |
| /* Try to allocate the buffer */ |
| len = s - p; |
| if ((val = (char *) malloc(len + 1)) != NULL) |
| (void) url_decode(p, len, val, len + 1, TRUE); |
| break; |
| } |
| |
| return (val); |
| } |
| |
| /* |
| * Free the pointer returned by mg_get_var(). This is needed for languages |
| * like python, to have an ability to free allocated data without |
| * loading C runtime library and calling free(). |
| */ |
| void |
| mg_free(char *data) |
| { |
| free(data); |
| } |
| |
| /* |
| * Return form data variable. |
| * It can be specified in query string, or in the POST data. |
| * Return NULL if the variable not found, or allocated 0-terminated value. |
| * It is caller's responsibility to free the returned value. |
| */ |
| char * |
| mg_get_var(const struct mg_connection *conn, const char *name) |
| { |
| const struct mg_request_info *ri = &conn->request_info; |
| char *v1, *v2; |
| |
| v1 = v2 = NULL; |
| |
| /* Look in both query_string and POST data */ |
| if (ri->query_string != NULL) |
| v1 = get_var(name, ri->query_string, strlen(ri->query_string)); |
| if (ri->post_data_len > 0) |
| v2 = get_var(name, ri->post_data, ri->post_data_len); |
| |
| /* If they both have queried variable, POST data wins */ |
| if (v1 != NULL && v2 != NULL) |
| free(v1); |
| |
| return (v2 == NULL ? v1 : v2); |
| } |
| |
| /* |
| * Transform URI to the file name. |
| */ |
| static void |
| convert_uri_to_file_name(struct mg_connection *conn, const char *uri, |
| char *buf, size_t buf_len) |
| { |
| struct mg_context *ctx = conn->ctx; |
| struct vec uri_vec, path_vec; |
| const char *list; |
| |
| lock_option(ctx, OPT_ROOT); |
| mg_snprintf(conn, buf, buf_len, "%s%s", ctx->options[OPT_ROOT], uri); |
| unlock_option(ctx, OPT_ROOT); |
| |
| /* If requested URI has aliased prefix, use alternate root */ |
| lock_option(ctx, OPT_ALIASES); |
| list = ctx->options[OPT_ALIASES]; |
| |
| while ((list = next_option(list, &uri_vec, &path_vec)) != NULL) { |
| if (memcmp(uri, uri_vec.ptr, uri_vec.len) == 0) { |
| (void) mg_snprintf(conn, buf, buf_len, "%.*s%s", |
| path_vec.len, path_vec.ptr, uri + uri_vec.len); |
| break; |
| } |
| } |
| unlock_option(ctx, OPT_ALIASES); |
| |
| #ifdef _WIN32 |
| fix_directory_separators(buf); |
| #endif /* _WIN32 */ |
| } |
| |
| /* |
| * Setup listening socket on given address, return socket. |
| * Address format: [local_ip_address:]port_number |
| */ |
| static SOCKET |
| mg_open_listening_port(struct mg_context *ctx, const char *str, struct usa *usa) |
| { |
| SOCKET sock; |
| int on = 1, a, b, c, d, port; |
| |
| /* MacOS needs that. If we do not zero it, bind() will fail. */ |
| (void) memset(usa, 0, sizeof(*usa)); |
| |
| if (sscanf(str, "%d.%d.%d.%d:%d", &a, &b, &c, &d, &port) == 5) { |
| /* IP address to bind to is specified */ |
| usa->u.sin.sin_addr.s_addr = |
| htonl((a << 24) | (b << 16) | (c << 8) | d); |
| } else if (sscanf(str, "%d", &port) == 1) { |
| /* Only port number is specified. Bind to all addresses */ |
| usa->u.sin.sin_addr.s_addr = htonl(INADDR_ANY); |
| } else { |
| return (INVALID_SOCKET); |
| } |
| |
| usa->len = sizeof(usa->u.sin); |
| usa->u.sin.sin_family = AF_INET; |
| usa->u.sin.sin_port = htons((uint16_t) port); |
| |
| if ((sock = socket(PF_INET, SOCK_STREAM, 6)) != INVALID_SOCKET && |
| setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
| (char *) &on, sizeof(on)) == 0 && |
| bind(sock, &usa->u.sa, usa->len) == 0 && |
| listen(sock, 128) == 0) { |
| /* Success */ |
| set_close_on_exec(sock); |
| } else { |
| /* Error */ |
| cry(fc(ctx), "%s(%d): %s", __func__, port, strerror(ERRNO)); |
| if (sock != INVALID_SOCKET) |
| (void) closesocket(sock); |
| sock = INVALID_SOCKET; |
| } |
| |
| return (sock); |
| } |
| |
| /* |
| * Check whether full request is buffered. Return: |
| * -1 if request is malformed |
| * 0 if request is not yet fully buffered |
| * >0 actual request length, including last \r\n\r\n |
| */ |
| static int |
| get_request_len(const char *buf, size_t buflen) |
| { |
| const char *s, *e; |
| int len = 0; |
| |
| for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) |
| /* Control characters are not allowed but >=128 is. */ |
| if (!isprint(* (unsigned char *) s) && *s != '\r' && |
| *s != '\n' && * (unsigned char *) s < 128) |
| len = -1; |
| else if (s[0] == '\n' && s[1] == '\n') |
| len = (int) (s - buf) + 2; |
| else if (s[0] == '\n' && &s[1] < e && |
| s[1] == '\r' && s[2] == '\n') |
| len = (int) (s - buf) + 3; |
| |
| return (len); |
| } |
| |
| /* |
| * Convert month to the month number. Return -1 on error, or month number |
| */ |
| static int |
| montoi(const char *s) |
| { |
| size_t i; |
| |
| for (i = 0; i < sizeof(month_names) / sizeof(month_names[0]); i++) |
| if (!strcmp(s, month_names[i])) |
| return ((int) i); |
| |
| return (-1); |
| } |
| |
| /* |
| * Parse date-time string, and return the corresponding time_t value |
| */ |
| static time_t |
| date_to_epoch(const char *s) |
| { |
| time_t current_time; |
| struct tm tm, *tmp; |
| char mon[32]; |
| int sec, min, hour, mday, month, year; |
| |
| (void) memset(&tm, 0, sizeof(tm)); |
| sec = min = hour = mday = month = year = 0; |
| |
| if (((sscanf(s, "%d/%3s/%d %d:%d:%d", |
| &mday, mon, &year, &hour, &min, &sec) == 6) || |
| (sscanf(s, "%d %3s %d %d:%d:%d", |
| &mday, mon, &year, &hour, &min, &sec) == 6) || |
| (sscanf(s, "%*3s, %d %3s %d %d:%d:%d", |
| &mday, mon, &year, &hour, &min, &sec) == 6) || |
| (sscanf(s, "%d-%3s-%d %d:%d:%d", |
| &mday, mon, &year, &hour, &min, &sec) == 6)) && |
| (month = montoi(mon)) != -1) { |
| tm.tm_mday = mday; |
| tm.tm_mon = month; |
| tm.tm_year = year; |
| tm.tm_hour = hour; |
| tm.tm_min = min; |
| tm.tm_sec = sec; |
| } |
| |
| if (tm.tm_year > 1900) |
| tm.tm_year -= 1900; |
| else if (tm.tm_year < 70) |
| tm.tm_year += 100; |
| |
| /* Set Daylight Saving Time field */ |
| current_time = time(NULL); |
| tmp = localtime(¤t_time); |
| tm.tm_isdst = tmp->tm_isdst; |
| |
| return (mktime(&tm)); |
| } |
| |
| /* |
| * Protect against directory disclosure attack by removing '..', |
| * excessive '/' and '\' characters |
| */ |
| static void |
| remove_double_dots_and_double_slashes(char *s) |
| { |
| char *p = s; |
| |
| while (*s != '\0') { |
| *p++ = *s++; |
| if (s[-1] == '/' || s[-1] == '\\') { |
| /* Skip all following slashes and backslashes */ |
| while (*s == '/' || *s == '\\') |
| s++; |
| |
| /* Skip all double-dots */ |
| while (*s == '.' && s[1] == '.') |
| s += 2; |
| } |
| } |
| *p = '\0'; |
| } |
| |
| /* |
| * Built-in mime types |
| */ |
| static const struct { |
| const char *extension; |
| size_t ext_len; |
| const char *mime_type; |
| size_t mime_type_len; |
| } mime_types[] = { |
| {".html", 5, "text/html", 9}, |
| {".htm", 4, "text/html", 9}, |
| {".shtm", 5, "text/html", 9}, |
| {".shtml", 6, "text/html", 9}, |
| {".css", 4, "text/css", 8}, |
| {".js", 3, "application/x-javascript", 24}, |
| {".ico", 4, "image/x-icon", 12}, |
| {".gif", 4, "image/gif", 9}, |
| {".jpg", 4, "image/jpeg", 10}, |
| {".jpeg", 5, "image/jpeg", 10}, |
| {".png", 4, "image/png", 9}, |
| {".svg", 4, "image/svg+xml", 13}, |
| {".torrent", 8, "application/x-bittorrent", 24}, |
| {".wav", 4, "audio/x-wav", 11}, |
| {".mp3", 4, "audio/x-mp3", 11}, |
| {".mid", 4, "audio/mid", 9}, |
| {".m3u", 4, "audio/x-mpegurl", 15}, |
| {".ram", 4, "audio/x-pn-realaudio", 20}, |
| {".ra", 3, "audio/x-pn-realaudio", 20}, |
| {".doc", 4, "application/msword", 19}, |
| {".exe", 4, "application/octet-stream", 24}, |
| {".zip", 4, "application/x-zip-compressed", 28}, |
| {".xls", 4, "application/excel", 17}, |
| {".tgz", 4, "application/x-tar-gz", 20}, |
| {".tar", 4, "application/x-tar", 17}, |
| {".gz", 3, "application/x-gunzip", 20}, |
| {".arj", 4, "application/x-arj-compressed", 28}, |
| {".rar", 4, "application/x-arj-compressed", 28}, |
| {".rtf", 4, "application/rtf", 15}, |
| {".pdf", 4, "application/pdf", 15}, |
| {".swf", 4, "application/x-shockwave-flash",29}, |
| {".mpg", 4, "video/mpeg", 10}, |
| {".mpeg", 5, "video/mpeg", 10}, |
| {".asf", 4, "video/x-ms-asf", 14}, |
| {".avi", 4, "video/x-msvideo", 15}, |
| {".bmp", 4, "image/bmp", 9}, |
| {NULL, 0, NULL, 0} |
| }; |
| |
| /* |
| * Look at the "path" extension and figure what mime type it has. |
| * Store mime type in the vector. |
| */ |
| static void |
| get_mime_type(struct mg_context *ctx, const char *path, struct vec *vec) |
| { |
| struct vec ext_vec, mime_vec; |
| const char *list, *ext; |
| size_t i, path_len; |
| |
| path_len = strlen(path); |
| |
| /* |
| * Scan user-defined mime types first, in case user wants to |
| * override default mime types. |
| */ |
| lock_option(ctx, OPT_MIME_TYPES); |
| list = ctx->options[OPT_MIME_TYPES]; |
| while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { |
| /* ext now points to the path suffix */ |
| ext = path + path_len - ext_vec.len; |
| if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
| *vec = mime_vec; |
| unlock_option(ctx, OPT_MIME_TYPES); |
| return; |
| } |
| } |
| unlock_option(ctx, OPT_MIME_TYPES); |
| |
| /* Now scan built-in mime types */ |
| for (i = 0; mime_types[i].extension != NULL; i++) { |
| ext = path + (path_len - mime_types[i].ext_len); |
| if (path_len > mime_types[i].ext_len && |
| mg_strcasecmp(ext, mime_types[i].extension) == 0) { |
| vec->ptr = mime_types[i].mime_type; |
| vec->len = mime_types[i].mime_type_len; |
| return; |
| } |
| } |
| |
| /* Nothing found. Fall back to text/plain */ |
| vec->ptr = "text/plain"; |
| vec->len = 10; |
| } |
| |
| #ifndef HAVE_MD5 |
| typedef struct MD5Context { |
| uint32_t buf[4]; |
| uint32_t bits[2]; |
| unsigned char in[64]; |
| } MD5_CTX; |
| |
| #if __BYTE_ORDER == 1234 |
| #define byteReverse(buf, len) /* Nothing */ |
| #else |
| /* |
| * Note: this code is harmless on little-endian machines. |
| */ |
| static void |
| byteReverse(unsigned char *buf, unsigned longs) |
| { |
| uint32_t t; |
| do { |
| t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
| ((unsigned) buf[1] << 8 | buf[0]); |
| *(uint32_t *) buf = t; |
| buf += 4; |
| } while (--longs); |
| } |
| #endif /* __BYTE_ORDER */ |
| |
| /* The four core functions - F1 is optimized somewhat */ |
| |
| /* #define F1(x, y, z) (x & y | ~x & z) */ |
| #define F1(x, y, z) (z ^ (x & (y ^ z))) |
| #define F2(x, y, z) F1(z, x, y) |
| #define F3(x, y, z) (x ^ y ^ z) |
| #define F4(x, y, z) (y ^ (x | ~z)) |
| |
| /* This is the central step in the MD5 algorithm. */ |
| #define MD5STEP(f, w, x, y, z, data, s) \ |
| ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
| |
| /* |
| * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
| * initialization constants. |
| */ |
| static void |
| MD5Init(MD5_CTX *ctx) |
| { |
| ctx->buf[0] = 0x67452301; |
| ctx->buf[1] = 0xefcdab89; |
| ctx->buf[2] = 0x98badcfe; |
| ctx->buf[3] = 0x10325476; |
| |
| ctx->bits[0] = 0; |
| ctx->bits[1] = 0; |
| } |
| |
| /* |
| * The core of the MD5 algorithm, this alters an existing MD5 hash to |
| * reflect the addition of 16 longwords of new data. MD5Update blocks |
| * the data and converts bytes into longwords for this routine. |
| */ |
| static void |
| MD5Transform(uint32_t buf[4], uint32_t const in[16]) |
| { |
| register uint32_t a, b, c, d; |
| |
| a = buf[0]; |
| b = buf[1]; |
| c = buf[2]; |
| d = buf[3]; |
| |
| MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
| MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
| MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); |
| MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
| MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
| MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
| MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); |
| MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); |
| MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); |
| MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
| MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
| MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
| MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
| MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
| MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
| MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
| |
| MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
| MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); |
| MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
| MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
| MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
| MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
| MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
| MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
| MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
| MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
| MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
| MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
| MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
| MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
| MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
| MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
| |
| MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
| MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); |
| MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
| MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
| MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
| MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
| MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
| MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
| MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
| MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
| MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
| MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); |
| MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
| MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
| MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
| MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
| |
| MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); |
| MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); |
| MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
| MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
| MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
| MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
| MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
| MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
| MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
| MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
| MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); |
| MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
| MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
| MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
| MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
| MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
| |
| buf[0] += a; |
| buf[1] += b; |
| buf[2] += c; |
| buf[3] += d; |
| } |
| |
| /* |
| * Update context to reflect the concatenation of another buffer full |
| * of bytes. |
| */ |
| static void |
| MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) |
| { |
| uint32_t t; |
| |
| /* Update bitcount */ |
| |
| t = ctx->bits[0]; |
| if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
| ctx->bits[1]++; /* Carry from low to high */ |
| ctx->bits[1] += len >> 29; |
| |
| t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ |
| |
| /* Handle any leading odd-sized chunks */ |
| |
| if (t) { |
| unsigned char *p = (unsigned char *) ctx->in + t; |
| |
| t = 64 - t; |
| if (len < t) { |
| memcpy(p, buf, len); |
| return; |
| } |
| memcpy(p, buf, t); |
| byteReverse(ctx->in, 16); |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| buf += t; |
| len -= t; |
| } |
| /* Process data in 64-byte chunks */ |
| |
| while (len >= 64) { |
| memcpy(ctx->in, buf, 64); |
| byteReverse(ctx->in, 16); |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| buf += 64; |
| len -= 64; |
| } |
| |
| /* Handle any remaining bytes of data. */ |
| |
| memcpy(ctx->in, buf, len); |
| } |
| |
| /* |
| * Final wrapup - pad to 64-byte boundary with the bit pattern |
| * 1 0* (64-bit count of bits processed, MSB-first) |
| */ |
| static void |
| MD5Final(unsigned char digest[16], MD5_CTX *ctx) |
| { |
| unsigned count; |
| unsigned char *p; |
| |
| /* Compute number of bytes mod 64 */ |
| count = (ctx->bits[0] >> 3) & 0x3F; |
| |
| /* Set the first char of padding to 0x80. This is safe since there is |
| always at least one byte free */ |
| p = ctx->in + count; |
| *p++ = 0x80; |
| |
| /* Bytes of padding needed to make 64 bytes */ |
| count = 64 - 1 - count; |
| |
| /* Pad out to 56 mod 64 */ |
| if (count < 8) { |
| /* Two lots of padding: Pad the first block to 64 bytes */ |
| memset(p, 0, count); |
| byteReverse(ctx->in, 16); |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| |
| /* Now fill the next block with 56 bytes */ |
| memset(ctx->in, 0, 56); |
| } else { |
| /* Pad block to 56 bytes */ |
| memset(p, 0, count - 8); |
| } |
| byteReverse(ctx->in, 14); |
| |
| /* Append length in bits and transform */ |
| ((uint32_t *) ctx->in)[14] = ctx->bits[0]; |
| ((uint32_t *) ctx->in)[15] = ctx->bits[1]; |
| |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| byteReverse((unsigned char *) ctx->buf, 4); |
| memcpy(digest, ctx->buf, 16); |
| memset((char *) ctx, 0, sizeof(ctx)); /* In case it's sensitive */ |
| } |
| #endif /* !HAVE_MD5 */ |
| |
| /* |
| * Stringify binary data. Output buffer must be twice as big as input, |
| * because each byte takes 2 bytes in string representation |
| */ |
| static void |
| bin2str(char *to, const unsigned char *p, size_t len) |
| { |
| static const char *hex = "0123456789abcdef"; |
| |
| for (; len--; p++) { |
| *to++ = hex[p[0] >> 4]; |
| *to++ = hex[p[0] & 0x0f]; |
| } |
| *to = '\0'; |
| } |
| |
| /* |
| * Return stringified MD5 hash for list of vectors. |
| * buf must point to 33-bytes long buffer |
| */ |
| static void |
| mg_md5(char *buf, ...) |
| { |
| unsigned char hash[16]; |
| const char *p; |
| va_list ap; |
| MD5_CTX ctx; |
| |
| MD5Init(&ctx); |
| |
| va_start(ap, buf); |
| while ((p = va_arg(ap, const char *)) != NULL) |
| MD5Update(&ctx, (unsigned char *) p, (int) strlen(p)); |
| va_end(ap); |
| |
| MD5Final(hash, &ctx); |
| bin2str(buf, hash, sizeof(hash)); |
| } |
| |
| /* |
| * Check the user's password, return 1 if OK |
| */ |
| static bool_t |
| check_password(const char *method, const char *ha1, const char *uri, |
| const char *nonce, const char *nc, const char *cnonce, |
| const char *qop, const char *response) |
| { |
| char ha2[32 + 1], expected_response[32 + 1]; |
| |
| /* XXX Due to a bug in MSIE, we do not compare the URI */ |
| /* Also, we do not check for authentication timeout */ |
| if (/*strcmp(dig->uri, c->ouri) != 0 || */ |
| strlen(response) != 32 /*|| |
| now - strtoul(dig->nonce, NULL, 10) > 3600 */) |
| return (FALSE); |
| |
| mg_md5(ha2, method, ":", uri, NULL); |
| mg_md5(expected_response, ha1, ":", nonce, ":", nc, |
| ":", cnonce, ":", qop, ":", ha2, NULL); |
| |
| return (!mg_strcasecmp(response, expected_response)); |
| } |
| |
| /* |
| * Use the global passwords file, if specified by auth_gpass option, |
| * or search for .htpasswd in the requested directory. |
| */ |
| static FILE * |
| open_auth_file(struct mg_connection *conn, const char *path) |
| { |
| struct mg_context *ctx = conn->ctx; |
| char name[FILENAME_MAX]; |
| const char *p, *e; |
| struct mgstat st; |
| FILE *fp; |
| |
| if (ctx->options[OPT_AUTH_GPASSWD] != NULL) { |
| /* Use global passwords file */ |
| fp = mg_fopen(ctx->options[OPT_AUTH_GPASSWD], "r"); |
| if (fp == NULL) |
| cry(fc(ctx), "fopen(%s): %s", |
| ctx->options[OPT_AUTH_GPASSWD], strerror(ERRNO)); |
| } else if (!mg_stat(path, &st) && st.is_directory) { |
| (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s", |
| path, DIRSEP, PASSWORDS_FILE_NAME); |
| fp = mg_fopen(name, "r"); |
| } else { |
| /* |
| * Try to find .htpasswd in requested directory. |
| * Given the path, create the path to .htpasswd file |
| * in the same directory. Find the right-most |
| * directory separator character first. That would be the |
| * directory name. If directory separator character is not |
| * found, 'e' will point to 'p'. |
| */ |
| for (p = path, e = p + strlen(p) - 1; e > p; e--) |
| if (IS_DIRSEP_CHAR(*e)) |
| break; |
| |
| /* |
| * Make up the path by concatenating directory name and |
| * .htpasswd file name. |
| */ |
| (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
| (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME); |
| fp = mg_fopen(name, "r"); |
| } |
| |
| return (fp); |
| } |
| |
| /* |
| * Parsed Authorization: header |
| */ |
| struct ah { |
| char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; |
| }; |
| |
| static bool_t |
| parse_auth_header(struct mg_connection *conn, char *buf, size_t buf_size, |
| struct ah *ah) |
| { |
| char *name, *value, *s; |
| const char *auth_header; |
| |
| if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || |
| mg_strncasecmp(auth_header, "Digest ", 7) != 0) |
| return (FALSE); |
| |
| /* Make modifiable copy of the auth header */ |
| (void) mg_strlcpy(buf, auth_header + 7, buf_size); |
| |
| s = buf; |
| (void) memset(ah, 0, sizeof(*ah)); |
| |
| /* Gobble initial spaces */ |
| while (isspace(* (unsigned char *) s)) |
| s++; |
| |
| /* Parse authorization header */ |
| for (;;) { |
| name = skip(&s, "="); |
| value = skip(&s, ", "); |
| |
| if (*value == '"') { |
| value++; |
| value[strlen(value) - 1] = '\0'; |
| } else if (*value == '\0') { |
| break; |
| } |
| |
| if (!strcmp(name, "username")) { |
| ah->user = value; |
| } else if (!strcmp(name, "cnonce")) { |
| ah->cnonce = value; |
| } else if (!strcmp(name, "response")) { |
| ah->response = value; |
| } else if (!strcmp(name, "uri")) { |
| ah->uri = value; |
| } else if (!strcmp(name, "qop")) { |
| ah->qop = value; |
| } else if (!strcmp(name, "nc")) { |
| ah->nc = value; |
| } else if (!strcmp(name, "nonce")) { |
| ah->nonce = value; |
| } |
| } |
| |
| /* CGI needs it as REMOTE_USER */ |
| if (ah->user != NULL) |
| conn->request_info.remote_user = mg_strdup(ah->user); |
| |
| return (TRUE); |
| } |
| |
| /* |
| * Authorize against the opened passwords file. Return 1 if authorized. |
| */ |
| static bool_t |
| authorize(struct mg_connection *conn, FILE *fp) |
| { |
| struct ah ah; |
| char line[256], f_user[256], domain[256], ha1[256], |
| buf[MAX_REQUEST_SIZE]; |
| if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) return (FALSE); |
| |
| /* Loop over passwords file */ |
| while (fgets(line, sizeof(line), fp) != NULL) { |
| |
| if (sscanf(line, "%[^:]:%[^:]:%s", f_user, domain, ha1) != 3) |
| continue; |
| |
| if (!strcmp(ah.user, f_user) && |
| !strcmp(domain, conn->ctx->options[OPT_AUTH_DOMAIN])) |
| return (check_password( |
| conn->request_info.request_method, ha1, |
| ah.uri, ah.nonce, ah.nc, ah.cnonce, |
| ah.qop, ah.response)); |
| } |
| |
| return (FALSE); |
| } |
| |
| /* |
| * Return TRUE if request is authorised, FALSE otherwise. |
| */ |
| static bool_t |
| check_authorization(struct mg_connection *conn, const char *path) |
| { |
| FILE *fp; |
| char fname[FILENAME_MAX]; |
| struct vec uri_vec, filename_vec; |
| const char *list; |
| bool_t authorized; |
| |
| fp = NULL; |
| authorized = TRUE; |
| |
| lock_option(conn->ctx, OPT_PROTECT); |
| list = conn->ctx->options[OPT_PROTECT]; |
| while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { |
| if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { |
| (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s", |
| filename_vec.len, filename_vec.ptr); |
| if ((fp = mg_fopen(fname, "r")) == NULL) |
| cry(conn, "%s: cannot open %s: %s", |
| __func__, fname, strerror(errno)); |
| break; |
| } |
| } |
| unlock_option(conn->ctx, OPT_PROTECT); |
| |
| if (fp == NULL) |
| fp = open_auth_file(conn, path); |
| |
| if (fp != NULL) { |
| authorized = authorize(conn, fp); |
| (void) fclose(fp); |
| } |
| |
| return (authorized); |
| } |
| |
| static void |
| send_authorization_request(struct mg_connection *conn) |
| { |
| conn->request_info.status_code = 401; |
| (void) mg_printf(conn, |
| "HTTP/1.1 401 Unauthorized\r\n" |
| "WWW-Authenticate: Digest qop=\"auth\", " |
| "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
| conn->ctx->options[OPT_AUTH_DOMAIN], (unsigned long) time(NULL)); |
| } |
| |
| static bool_t |
| is_authorized_for_put(struct mg_connection *conn) |
| { |
| FILE *fp; |
| int ret = FALSE; |
| |
| if ((fp = mg_fopen(conn->ctx->options[OPT_AUTH_PUT], "r")) != NULL) { |
| set_close_on_exec(fileno(fp)); |
| ret = authorize(conn, fp); |
| (void) fclose(fp); |
| } |
| |
| return (ret); |
| } |
| |
| int |
| mg_modify_passwords_file(struct mg_context *ctx, const char *fname, |
| const char *user, const char *pass) |
| { |
| int found; |
| char line[512], u[512], d[512], ha1[33], tmp[FILENAME_MAX]; |
| const char *domain; |
| FILE *fp, *fp2; |
| |
| found = 0; |
| fp = fp2 = NULL; |
| domain = ctx->options[OPT_AUTH_DOMAIN]; |
| |
| /* Regard empty password as no password - remove user record. */ |
| if (pass[0] == '\0') |
| pass = NULL; |
| |
| (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); |
| |
| /* Create the file if does not exist */ |
| if ((fp = mg_fopen(fname, "a+")) != NULL) |
| (void) fclose(fp); |
| |
| /* Open the given file and temporary file */ |
| if ((fp = mg_fopen(fname, "r")) == NULL) { |
| cry(fc(ctx), "Cannot open %s: %s", fname, strerror(errno)); |
| return (0); |
| } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) { |
| cry(fc(ctx), "Cannot open %s: %s", tmp, strerror(errno)); |
| return (0); |
| } |
| |
| /* Copy the stuff to temporary file */ |
| while (fgets(line, sizeof(line), fp) != NULL) { |
| |
| if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) |
| continue; |
| |
| if (!strcmp(u, user) && !strcmp(d, domain)) { |
| found++; |
| if (pass != NULL) { |
| mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
| fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
| } |
| } else { |
| (void) fprintf(fp2, "%s", line); |
| } |
| } |
| |
| /* If new user, just add it */ |
| if (!found && pass != NULL) { |
| mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
| (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
| } |
| |
| /* Close files */ |
| (void) fclose(fp); |
| (void) fclose(fp2); |
| |
| /* Put the temp file in place of real file */ |
| (void) mg_remove(fname); |
| (void) mg_rename(tmp, fname); |
| |
| return (0); |
| } |
| |
| struct de { |
| struct mg_connection *conn; |
| char *file_name; |
| struct mgstat st; |
| }; |
| |
| /* |
| * This function is called from send_directory() and prints out |
| * single directory entry. |
| */ |
| static void |
| print_dir_entry(struct de *de) |
| { |
| char size[64], mod[64]; |
| |
| if (de->st.is_directory) { |
| (void) mg_snprintf(de->conn, |
| size, sizeof(size), "%s", "[DIRECTORY]"); |
| } else { |
| /* |
| * We use (signed) cast below because MSVC 6 compiler cannot |
| * convert unsigned __int64 to double. Sigh. |
| */ |
| if (de->st.size < 1024) |
| (void) mg_snprintf(de->conn, size, sizeof(size), |
| "%lu", (unsigned long) de->st.size); |
| else if (de->st.size < 1024 * 1024) |
| (void) mg_snprintf(de->conn, size, sizeof(size), |
| "%.1fk", (double) de->st.size / 1024.0); |
| else if (de->st.size < 1024 * 1024 * 1024) |
| (void) mg_snprintf(de->conn, size, sizeof(size), |
| "%.1fM", (double) de->st.size / 1048576); |
| else |
| (void) mg_snprintf(de->conn, size, sizeof(size), |
| "%.1fG", (double) de->st.size / 1073741824); |
| } |
| (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", |
| localtime(&de->st.mtime)); |
| de->conn->num_bytes_sent += mg_printf(de->conn, |
| "<tr><td><a href=\"%s%s\">%s%s</a></td>" |
| "<td> %s</td><td> %s</td></tr>\n", |
| de->conn->request_info.uri, de->file_name, de->file_name, |
| de->st.is_directory ? "/" : "", mod, size); |
| } |
| |
| /* |
| * This function is called from send_directory() and used for |
| * sorting direcotory entries by size, or name, or modification time. |
| */ |
| static int |
| compare_dir_entries(const void *p1, const void *p2) |
| { |
| const struct de *a = (struct de *) p1, *b = (struct de *) p2; |
| const char *query_string = a->conn->request_info.query_string; |
| int cmp_result = 0; |
| |
| if (query_string == NULL) |
| query_string = "na"; |
| |
| if (a->st.is_directory && !b->st.is_directory) { |
| return (-1); /* Always put directories on top */ |
| } else if (!a->st.is_directory && b->st.is_directory) { |
| return (1); /* Always put directories on top */ |
| } else if (*query_string == 'n') { |
| cmp_result = strcmp(a->file_name, b->file_name); |
| } else if (*query_string == 's') { |
| cmp_result = a->st.size == b->st.size ? 0 : |
| a->st.size > b->st.size ? 1 : -1; |
| } else if (*query_string == 'd') { |
| cmp_result = a->st.mtime == b->st.mtime ? 0 : |
| a->st.mtime > b->st.mtime ? 1 : -1; |
| } |
| |
| return (query_string[1] == 'd' ? -cmp_result : cmp_result); |
| } |
| |
| /* |
| * Send directory contents. |
| */ |
| static void |
| send_directory(struct mg_connection *conn, const char *dir) |
| { |
| struct dirent *dp; |
| DIR *dirp; |
| struct de *entries = NULL; |
| char path[FILENAME_MAX]; |
| int i, sort_direction, num_entries = 0, arr_size = 128; |
| |
| if ((dirp = opendir(dir)) == NULL) { |
| send_error(conn, 500, "Cannot open directory", |
| "Error: opendir(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| (void) mg_printf(conn, "%s", |
| "HTTP/1.1 200 OK\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html; charset=utf-8\r\n\r\n"); |
| |
| sort_direction = conn->request_info.query_string != NULL && |
| conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
| |
| while ((dp = readdir(dirp)) != NULL) { |
| |
| /* Do not show current dir and passwords file */ |
| if (!strcmp(dp->d_name, ".") || |
| !strcmp(dp->d_name, "..") || |
| !strcmp(dp->d_name, PASSWORDS_FILE_NAME)) |
| continue; |
| |
| if (entries == NULL || num_entries >= arr_size) { |
| arr_size *= 2; |
| entries = (struct de *) realloc(entries, |
| arr_size * sizeof(entries[0])); |
| } |
| |
| if (entries == NULL) { |
| send_error(conn, 500, "Cannot open directory", |
| "%s", "Error: cannot allocate memory"); |
| return; |
| } |
| |
| (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
| dir, DIRSEP, dp->d_name); |
| |
| (void) mg_stat(path, &entries[num_entries].st); |
| entries[num_entries].conn = conn; |
| entries[num_entries].file_name = mg_strdup(dp->d_name); |
| num_entries++; |
| } |
| (void) closedir(dirp); |
| |
| conn->num_bytes_sent += mg_printf(conn, |
| "<html><head><title>Index of %s</title>" |
| "<style>th {text-align: left;}</style></head>" |
| "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" |
| "<tr><th><a href=\"?n%c\">Name</a></th>" |
| "<th><a href=\"?d%c\">Modified</a></th>" |
| "<th><a href=\"?s%c\">Size</a></th></tr>" |
| "<tr><td colspan=\"3\"><hr></td></tr>", |
| conn->request_info.uri, conn->request_info.uri, |
| sort_direction, sort_direction, sort_direction); |
| |
| /* Print first entry - link to a parent directory */ |
| conn->num_bytes_sent += mg_printf(conn, |
| "<tr><td><a href=\"%s%s\">%s</a></td>" |
| "<td> %s</td><td> %s</td></tr>\n", |
| conn->request_info.uri, "..", "Parent directory", "-", "-"); |
| |
| /* Sort and print directory entries */ |
| qsort(entries, num_entries, sizeof(entries[0]), compare_dir_entries); |
| for (i = 0; i < num_entries; i++) { |
| print_dir_entry(&entries[i]); |
| free(entries[i].file_name); |
| } |
| free(entries); |
| |
| conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); |
| conn->request_info.status_code = 200; |
| } |
| |
| /* |
| * Send len bytes from the opened file to the client. |
| */ |
| static void |
| send_opened_file_stream(struct mg_connection *conn, FILE *fp, uint64_t len) |
| { |
| char buf[BUFSIZ]; |
| int to_read, num_read, num_written; |
| |
| while (len > 0) { |
| /* Calculate how much to read from the file in the buffer */ |
| to_read = sizeof(buf); |
| if ((uint64_t) to_read > len) |
| to_read = (int) len; |
| |
| /* Read from file, exit the loop on error */ |
| if ((num_read = fread(buf, 1, to_read, fp)) == 0) |
| break; |
| |
| /* Send read bytes to the client, exit the loop on error */ |
| if ((num_written = mg_write(conn, buf, num_read)) != num_read) |
| break; |
| |
| /* Both read and were successful, adjust counters */ |
| conn->num_bytes_sent += num_written; |
| len -= num_written; |
| } |
| } |
| |
| /* |
| * Send regular file contents. |
| */ |
| static void |
| send_file(struct mg_connection *conn, const char *path, struct mgstat *stp) |
| { |
| char date[64], lm[64], etag[64], range[64]; |
| const char *fmt = "%a, %d %b %Y %H:%M:%S %Z", *msg = "OK", *hdr; |
| time_t curtime = time(NULL); |
| uint64_t cl, r1, r2; |
| struct vec mime_vec; |
| FILE *fp; |
| int n; |
| |
| get_mime_type(conn->ctx, path, &mime_vec); |
| cl = stp->size; |
| conn->request_info.status_code = 200; |
| range[0] = '\0'; |
| |
| if ((fp = mg_fopen(path, "rb")) == NULL) { |
| send_error(conn, 500, http_500_error, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| set_close_on_exec(fileno(fp)); |
| |
| /* If Range: header specified, act accordingly */ |
| r1 = r2 = 0; |
| hdr = mg_get_header(conn, "Range"); |
| if (hdr != NULL && (n = sscanf(hdr, |
| "bytes=%" UINT64_FMT "u-%" UINT64_FMT "u", &r1, &r2)) > 0) { |
| conn->request_info.status_code = 206; |
| (void) fseeko(fp, (off_t) r1, SEEK_SET); |
| cl = n == 2 ? r2 - r1 + 1: cl - r1; |
| (void) mg_snprintf(conn, range, sizeof(range), |
| "Content-Range: bytes " |
| "%" UINT64_FMT "u-%" |
| UINT64_FMT "u/%" UINT64_FMT "u\r\n", |
| r1, r1 + cl - 1, stp->size); |
| msg = "Partial Content"; |
| } |
| |
| /* Prepare Etag, Date, Last-Modified headers */ |
| (void) strftime(date, sizeof(date), fmt, localtime(&curtime)); |
| (void) strftime(lm, sizeof(lm), fmt, localtime(&stp->mtime)); |
| (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx", |
| (unsigned long) stp->mtime, (unsigned long) stp->size); |
| |
| (void) mg_printf(conn, |
| "HTTP/1.1 %d %s\r\n" |
| "Date: %s\r\n" |
| "Last-Modified: %s\r\n" |
| "Etag: \"%s\"\r\n" |
| "Content-Type: %.*s\r\n" |
| "Content-Length: %" UINT64_FMT "u\r\n" |
| "Connection: close\r\n" |
| "Accept-Ranges: bytes\r\n" |
| "%s\r\n", |
| conn->request_info.status_code, msg, date, lm, etag, |
| mime_vec.len, mime_vec.ptr, cl, range); |
| |
| if (strcmp(conn->request_info.request_method, "HEAD") != 0) |
| send_opened_file_stream(conn, fp, cl); |
| (void) fclose(fp); |
| } |
| |
| /* |
| * Parse HTTP headers from the given buffer, advance buffer to the point |
| * where parsing stopped. |
| */ |
| static void |
| parse_http_headers(char **buf, struct mg_request_info *ri) |
| { |
| int i; |
| |
| for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { |
| ri->http_headers[i].name = skip(buf, ": "); |
| ri->http_headers[i].value = skip(buf, "\r\n"); |
| if (ri->http_headers[i].name[0] == '\0') |
| break; |
| ri->num_headers = i + 1; |
| } |
| } |
| |
| static bool_t |
| is_known_http_method(const char *method) |
| { |
| return (!strcmp(method, "GET") || |
| !strcmp(method, "POST") || |
| !strcmp(method, "HEAD") || |
| !strcmp(method, "PUT") || |
| !strcmp(method, "DELETE")); |
| } |
| |
| /* |
| * Parse HTTP request, fill in mg_request_info structure. |
| */ |
| static bool_t |
| parse_http_request(char *buf, struct mg_request_info *ri, const struct usa *usa) |
| { |
| char *http_version; |
| int n, success_code = FALSE; |
| |
| ri->request_method = skip(&buf, " "); |
| ri->uri = skip(&buf, " "); |
| http_version = skip(&buf, "\r\n"); |
| |
| if (is_known_http_method(ri->request_method) && |
| ri->uri[0] == '/' && |
| sscanf(http_version, "HTTP/%d.%d%n", |
| &ri->http_version_major, &ri->http_version_minor, &n) == 2 && |
| http_version[n] == '\0') { |
| parse_http_headers(&buf, ri); |
| ri->remote_port = ntohs(usa->u.sin.sin_port); |
| (void) memcpy(&ri->remote_ip, &usa->u.sin.sin_addr.s_addr, 4); |
| ri->remote_ip = ntohl(ri->remote_ip); |
| success_code = TRUE; |
| } |
| |
| return (success_code); |
| } |
| |
| /* |
| * Keep reading the input (either opened file descriptor fd, or socket sock, |
| * or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the |
| * buffer (which marks the end of HTTP request). Buffer buf may already |
| * have some data. The length of the data is stored in nread. |
| * Upon every read operation, increase nread by the number of bytes read. |
| */ |
| static int |
| read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz, int *nread) |
| { |
| int n, request_len; |
| |
| request_len = 0; |
| while (*nread < bufsiz && request_len == 0) { |
| n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread); |
| if (n <= 0) { |
| break; |
| } else { |
| *nread += n; |
| request_len = get_request_len(buf, (size_t) *nread); |
| } |
| } |
| |
| return (request_len); |
| } |
| |
| /* |
| * For given directory path, substitute it to valid index file. |
| * Return 0 if index file has been found, -1 if not found. |
| * If the file is found, it's stats is returned in stp. |
| */ |
| static bool_t |
| substitute_index_file(struct mg_connection *conn, |
| char *path, size_t path_len, struct mgstat *stp) |
| { |
| const char *list; |
| struct mgstat st; |
| struct vec filename_vec; |
| size_t n; |
| bool_t found; |
| |
| n = strlen(path); |
| |
| /* |
| * The 'path' given to us points to the directory. Remove all trailing |
| * directory separator characters from the end of the path, and |
| * then append single directory separator character. |
| */ |
| while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) |
| n--; |
| path[n] = DIRSEP; |
| |
| /* |
| * Traverse index files list. For each entry, append it to the given |
| * path and see if the file exists. If it exists, break the loop |
| */ |
| lock_option(conn->ctx, OPT_INDEX_FILES); |
| list = conn->ctx->options[OPT_INDEX_FILES]; |
| found = FALSE; |
| |
| while ((list = next_option(list, &filename_vec, NULL)) != NULL) { |
| |
| /* Ignore too long entries that may overflow path buffer */ |
| if (filename_vec.len > path_len - n) |
| continue; |
| |
| /* Prepare full path to the index file */ |
| (void) mg_strlcpy(path + n + 1, |
| filename_vec.ptr, filename_vec.len + 1); |
| |
| /* Does it exist ? */ |
| if (mg_stat(path, &st) == 0) { |
| /* Yes it does, break the loop */ |
| *stp = st; |
| found = TRUE; |
| break; |
| } |
| } |
| unlock_option(conn->ctx, OPT_INDEX_FILES); |
| |
| /* If no index file exists, restore directory path */ |
| if (found == FALSE) |
| path[n] = '\0'; |
| |
| return (found); |
| } |
| |
| static void |
| remove_callback(struct mg_context *ctx, |
| const char *uri_regex, int status_code, bool_t is_auth) |
| { |
| struct callback *cb; |
| int i; |
| |
| for (i = 0; i < ctx->num_callbacks; i++) { |
| cb = ctx->callbacks + i; |
| if ((uri_regex != NULL && cb->uri_regex != NULL && |
| ((is_auth && cb->is_auth) || (!is_auth && !cb->is_auth)) && |
| !strcmp(uri_regex, cb->uri_regex)) || (uri_regex == NULL && |
| (cb->status_code == 0 || |
| cb->status_code == status_code))) { |
| (void) memmove(cb, cb + 1, |
| (char *) (ctx->callbacks + ctx->num_callbacks) - |
| (char *) (cb + 1)); |
| break; |
| } |
| } |
| } |
| |
| static void |
| add_callback(struct mg_context *ctx, const char *uri_regex, int status_code, |
| mg_callback_t func, bool_t is_auth, void *user_data) |
| { |
| struct callback *cb; |
| |
| pthread_mutex_lock(&ctx->bind_mutex); |
| if (func == NULL) { |
| remove_callback(ctx, uri_regex, status_code, is_auth); |
| } else if (ctx->num_callbacks >= (int) ARRAY_SIZE(ctx->callbacks) - 1) { |
| cry(fc(ctx), "Too many callbacks! Increase MAX_CALLBACKS."); |
| } else { |
| cb = &ctx->callbacks[ctx->num_callbacks]; |
| cb->uri_regex = uri_regex ? mg_strdup(uri_regex) : NULL; |
| cb->func = func; |
| cb->is_auth = is_auth; |
| cb->status_code = status_code; |
| cb->user_data = user_data; |
| ctx->num_callbacks++; |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: uri %s code %d", |
| __func__, uri_regex ? uri_regex : "NULL", status_code)); |
| } |
| pthread_mutex_unlock(&ctx->bind_mutex); |
| } |
| |
| void |
| mg_set_uri_callback(struct mg_context *ctx, const char *uri_regex, |
| mg_callback_t func, void *user_data) |
| { |
| assert(uri_regex != NULL); |
| add_callback(ctx, uri_regex, -1, func, FALSE, user_data); |
| } |
| |
| void |
| mg_set_error_callback(struct mg_context *ctx, int error_code, |
| mg_callback_t func, void *user_data) |
| { |
| assert(error_code >= 0 && error_code < 1000); |
| add_callback(ctx, NULL, error_code, func, FALSE, user_data); |
| } |
| |
| void |
| mg_set_auth_callback(struct mg_context *ctx, const char *uri_regex, |
| mg_callback_t func, void *user_data) |
| { |
| assert(uri_regex != NULL); |
| add_callback(ctx, uri_regex, -1, func, TRUE, user_data); |
| } |
| |
| /* |
| * Return True if we should reply 304 Not Modified. |
| */ |
| static bool_t |
| is_not_modified(const struct mg_connection *conn, const struct mgstat *stp) |
| { |
| const char *ims = mg_get_header(conn, "If-Modified-Since"); |
| return (ims != NULL && stp->mtime < date_to_epoch(ims)); |
| } |
| |
| static bool_t |
| append_chunk(struct mg_request_info *ri, FILE *fp, const char *buf, int len) |
| { |
| bool_t ret_code = TRUE; |
| |
| if (fp == NULL) { |
| /* TODO: check for NULL here */ |
| ri->post_data = (char *) realloc(ri->post_data, |
| ri->post_data_len + len); |
| (void) memcpy(ri->post_data + ri->post_data_len, buf, len); |
| ri->post_data_len += len; |
| } else if (push(fp, INVALID_SOCKET, |
| NULL, buf, (uint64_t) len) != (uint64_t) len) { |
| ret_code = FALSE; |
| } |
| |
| return (ret_code); |
| } |
| |
| static bool_t |
| handle_request_body(struct mg_connection *conn, FILE *fp) |
| { |
| struct mg_request_info *ri = &conn->request_info; |
| const char *expect, *tmp; |
| uint64_t content_len; |
| char buf[BUFSIZ]; |
| int to_read, nread, already_read; |
| bool_t success_code = FALSE; |
| |
| content_len = get_content_length(conn); |
| expect = mg_get_header(conn, "Expect"); |
| |
| if (content_len == UNKNOWN_CONTENT_LENGTH) { |
| send_error(conn, 411, "Length Required", ""); |
| } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) { |
| send_error(conn, 417, "Expectation Failed", ""); |
| } else { |
| if (expect != NULL) |
| (void) mg_printf(conn, "HTTP/1.1 100 Continue\r\n\r\n"); |
| |
| already_read = ri->post_data_len; |
| assert(already_read >= 0); |
| |
| if (content_len <= (uint64_t) already_read) { |
| ri->post_data_len = (int) content_len; |
| /* |
| * If fp is NULL, this is embedded mode, and we do not |
| * have to do anything: POST data is already there, |
| * no need to allocate a buffer and copy it in. |
| * If fp != NULL, we need to write the data. |
| */ |
| success_code = fp == NULL || (push(fp, INVALID_SOCKET, |
| NULL, ri->post_data, content_len) == content_len) ? |
| TRUE : FALSE; |
| } else { |
| |
| if (fp == NULL) { |
| conn->free_post_data = TRUE; |
| tmp = ri->post_data; |
| /* +1 in case if already_read == 0 */ |
| ri->post_data = (char*)malloc(already_read + 1); |
| (void) memcpy(ri->post_data, tmp, already_read); |
| } else { |
| (void) push(fp, INVALID_SOCKET, NULL, |
| ri->post_data, (uint64_t) already_read); |
| } |
| |
| content_len -= already_read; |
| |
| while (content_len > 0) { |
| to_read = sizeof(buf); |
| if ((uint64_t) to_read > content_len) |
| to_read = (int) content_len; |
| nread = pull(NULL, conn->client.sock, |
| conn->ssl, buf, to_read); |
| if (nread <= 0) |
| break; |
| if (!append_chunk(ri, fp, buf, nread)) |
| break; |
| content_len -= nread; |
| } |
| success_code = content_len == 0 ? TRUE : FALSE; |
| } |
| |
| /* Each error code path in this function must send an error */ |
| if (success_code != TRUE) |
| send_error(conn, 577, http_500_error, |
| "%s", "Error handling body data"); |
| } |
| |
| return (success_code); |
| } |
| |
| #if !defined(NO_CGI) |
| |
| /* |
| * This structure helps to create an environment for the spawned CGI program. |
| * Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, |
| * last element must be NULL. |
| * However, on Windows there is a requirement that all these VARIABLE=VALUE\0 |
| * strings must reside in a contiguous buffer. The end of the buffer is |
| * marked by two '\0' characters. |
| * We satisfy both worlds: we create an envp array (which is vars), all |
| * entries are actually pointers inside buf. |
| */ |
| struct cgi_env_block { |
| struct mg_connection *conn; |
| char buf[CGI_ENVIRONMENT_SIZE]; /* Environment buffer */ |
| int len; /* Space taken */ |
| char *vars[MAX_CGI_ENVIR_VARS]; /* char **envp */ |
| int nvars; /* Number of variables */ |
| }; |
| |
| /* |
| * Append VARIABLE=VALUE\0 string to the buffer, and add a respective |
| * pointer into the vars array. |
| */ |
| static char * |
| addenv(struct cgi_env_block *block, const char *fmt, ...) |
| { |
| int n, space; |
| char *added; |
| va_list ap; |
| |
| /* Calculate how much space is left in the buffer */ |
| space = sizeof(block->buf) - block->len - 2; |
| assert(space >= 0); |
| |
| /* Make a pointer to the free space int the buffer */ |
| added = block->buf + block->len; |
| |
| /* Copy VARIABLE=VALUE\0 string into the free space */ |
| va_start(ap, fmt); |
| n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); |
| va_end(ap); |
| |
| /* Make sure we do not overflow buffer and the envp array */ |
| if (n > 0 && n < space && |
| block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { |
| /* Append a pointer to the added string into the envp array */ |
| block->vars[block->nvars++] = block->buf + block->len; |
| /* Bump up used length counter. Include \0 terminator */ |
| block->len += n + 1; |
| } |
| |
| return (added); |
| } |
| |
| static void |
| prepare_cgi_environment(struct mg_connection *conn, const char *prog, |
| struct cgi_env_block *blk) |
| { |
| const char *s, *script_filename, *root; |
| struct vec var_vec; |
| char *p; |
| int i; |
| |
| blk->len = blk->nvars = 0; |
| blk->conn = conn; |
| |
| /* SCRIPT_FILENAME */ |
| script_filename = prog; |
| if ((s = strrchr(prog, '/')) != NULL) |
| script_filename = s + 1; |
| |
| lock_option(conn->ctx, OPT_ROOT); |
| root = conn->ctx->options[OPT_ROOT]; |
| addenv(blk, "SERVER_NAME=%s", conn->ctx->options[OPT_AUTH_DOMAIN]); |
| unlock_option(conn->ctx, OPT_ROOT); |
| |
| /* Prepare the environment block */ |
| addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); |
| addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); |
| addenv(blk, "%s", "REDIRECT_STATUS=200"); /* PHP */ |
| addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.u.sin.sin_port)); |
| addenv(blk, "SERVER_ROOT=%s", root); |
| addenv(blk, "DOCUMENT_ROOT=%s", root); |
| addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); |
| addenv(blk, "REMOTE_ADDR=%s", |
| inet_ntoa(conn->client.rsa.u.sin.sin_addr)); |
| addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); |
| addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); |
| addenv(blk, "SCRIPT_NAME=%s", prog + strlen(root)); |
| addenv(blk, "SCRIPT_FILENAME=%s", script_filename); /* PHP */ |
| addenv(blk, "PATH_TRANSLATED=%s", prog); |
| addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); |
| |
| if ((s = mg_get_header(conn, "Content-Type")) != NULL) |
| addenv(blk, "CONTENT_TYPE=%s", s); |
| |
| if (conn->request_info.query_string != NULL) |
| addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); |
| |
| if ((s = mg_get_header(conn, "Content-Length")) != NULL) |
| addenv(blk, "CONTENT_LENGTH=%s", s); |
| |
| if ((s = getenv("PATH")) != NULL) |
| addenv(blk, "PATH=%s", s); |
| |
| #if defined(_WIN32) |
| if ((s = getenv("COMSPEC")) != NULL) |
| addenv(blk, "COMSPEC=%s", s); |
| if ((s = getenv("SYSTEMROOT")) != NULL) |
| addenv(blk, "SYSTEMROOT=%s", s); |
| #else |
| if ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
| addenv(blk, "LD_LIBRARY_PATH=%s", s); |
| #endif /* _WIN32 */ |
| |
| if ((s = getenv("PERLLIB")) != NULL) |
| addenv(blk, "PERLLIB=%s", s); |
| |
| if (conn->request_info.remote_user != NULL) { |
| addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); |
| addenv(blk, "%s", "AUTH_TYPE=Digest"); |
| } |
| |
| /* Add all headers as HTTP_* variables */ |
| for (i = 0; i < conn->request_info.num_headers; i++) { |
| p = addenv(blk, "HTTP_%s=%s", |
| conn->request_info.http_headers[i].name, |
| conn->request_info.http_headers[i].value); |
| |
| /* Convert variable name into uppercase, and change - to _ */ |
| for (; *p != '=' && *p != '\0'; p++) { |
| if (*p == '-') |
| *p = '_'; |
| *p = (char) toupper(* (unsigned char *) p); |
| } |
| } |
| |
| /* Add user-specified variables */ |
| lock_option(conn->ctx, OPT_CGI_ENV); |
| s = conn->ctx->options[OPT_CGI_ENV]; |
| while ((s = next_option(s, &var_vec, NULL)) != NULL) |
| addenv(blk, "%.*s", var_vec.len, var_vec.ptr); |
| unlock_option(conn->ctx, OPT_CGI_ENV); |
| |
| blk->vars[blk->nvars++] = NULL; |
| blk->buf[blk->len++] = '\0'; |
| |
| assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); |
| assert(blk->len > 0); |
| assert(blk->len < (int) sizeof(blk->buf)); |
| } |
| |
| static void |
| send_cgi(struct mg_connection *conn, const char *prog) |
| { |
| int headers_len, data_len, i, n; |
| const char *status; |
| char buf[MAX_REQUEST_SIZE], *pbuf; |
| struct mg_request_info ri; |
| struct cgi_env_block blk; |
| char dir[FILENAME_MAX], *p; |
| int fd_stdin[2], fd_stdout[2]; |
| FILE *in, *out; |
| pid_t pid; |
| |
| memset(&ri, 0, sizeof ri); |
| prepare_cgi_environment(conn, prog, &blk); |
| |
| /* CGI must be executed in its own directory */ |
| (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); |
| if ((p = strrchr(dir, DIRSEP)) != NULL) |
| *p++ = '\0'; |
| |
| pid = (pid_t) -1; |
| fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1; |
| in = out = NULL; |
| |
| if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) { |
| send_error(conn, 500, http_500_error, |
| "Cannot create CGI pipe: %s", strerror(ERRNO)); |
| goto done; |
| } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars, |
| fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) { |
| goto done; |
| } |
| #ifndef _WIN32 |
| else if ((in = fdopen(fd_stdin[1], "wb")) == NULL || |
| (out = fdopen(fd_stdout[0], "rb")) == NULL) { |
| #else |
| else if ((in = _fdopen(fd_stdin[1], "wb")) == NULL || |
| (out = _fdopen(fd_stdout[0], "rb")) == NULL) { |
| #endif |
| send_error(conn, 500, http_500_error, |
| "fopen: %s", strerror(ERRNO)); |
| goto done; |
| } |
| |
| setbuf(in, NULL); |
| setbuf(out, NULL); |
| |
| /* |
| * spawn_process() must close those! |
| * If we don't mark them as closed, close() attempt before |
| * return from this function throws an exception on Windows. |
| * Windows does not like when closed descriptor is closed again. |
| */ |
| fd_stdin[0] = fd_stdout[1] = -1; |
| |
| /* Send POST data to the CGI process if needed */ |
| if (!strcmp(conn->request_info.request_method, "POST") && |
| !handle_request_body(conn, in)) { |
| goto done; |
| } |
| |
| /* |
| * Now read CGI reply into a buffer. We need to set correct |
| * status code, thus we need to see all HTTP headers first. |
| * Do not send anything back to client, until we buffer in all |
| * HTTP headers. |
| */ |
| data_len = 0; |
| headers_len = read_request(out, INVALID_SOCKET, NULL, |
| buf, sizeof(buf), &data_len); |
| if (headers_len <= 0) { |
| send_error(conn, 500, http_500_error, |
| "CGI program sent malformed HTTP headers: [%.*s]", |
| data_len, buf); |
| goto done; |
| } |
| pbuf = buf; |
| buf[headers_len - 1] = '\0'; |
| parse_http_headers(&pbuf, &ri); |
| |
| /* Make up and send the status line */ |
| status = get_header(&ri, "Status"); |
| conn->request_info.status_code = status == NULL ? 200 : atoi(status); |
| (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n", |
| conn->request_info.status_code); |
| |
| /* Send headers */ |
| for (i = 0; i < ri.num_headers; i++) |
| (void) mg_printf(conn, "%s: %s\r\n", |
| ri.http_headers[i].name, |
| ri.http_headers[i].value); |
| (void) mg_write(conn, "\r\n", 2); |
| |
| /* Send chunk of data that may be read after the headers */ |
| conn->num_bytes_sent += mg_write(conn, |
| buf + headers_len, data_len - headers_len); |
| |
| /* |
| * Read the rest of CGI output and send to the client. If read from |
| * CGI returns 0, CGI has finished output. If it returns < 0, |
| * some read error occured (CGI process terminated unexpectedly?) |
| * If write to the client fails, the means client has disconnected |
| * unexpectedly. |
| * In all such cases, stop data exchange and do cleanup. |
| */ |
| do { |
| n = pull(out, INVALID_SOCKET, NULL, buf, sizeof(buf)); |
| if (n > 0) |
| n = mg_write(conn, buf, n); |
| if (n > 0) |
| conn->num_bytes_sent += n; |
| } while (n > 0); |
| |
| done: |
| if (pid != (pid_t) -1) |
| kill(pid, SIGTERM); |
| if (fd_stdin[0] != -1) |
| (void) close(fd_stdin[0]); |
| if (fd_stdout[1] != -1) |
| (void) close(fd_stdout[1]); |
| |
| if (in != NULL) |
| (void) fclose(in); |
| else if (fd_stdin[1] != -1) |
| (void) close(fd_stdin[1]); |
| |
| if (out != NULL) |
| (void) fclose(out); |
| else if (fd_stdout[0] != -1) |
| (void) close(fd_stdout[0]); |
| } |
| #endif /* !NO_CGI */ |
| |
| /* |
| * For a given PUT path, create all intermediate subdirectories |
| * for given path. Return 0 if the path itself is a directory, |
| * or -1 on error, 1 if OK. |
| */ |
| static int |
| put_dir(const char *path) |
| { |
| char buf[FILENAME_MAX]; |
| const char *s, *p; |
| struct mgstat st; |
| size_t len; |
| |
| for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) { |
| len = p - path; |
| assert(len < sizeof(buf)); |
| (void) memcpy(buf, path, len); |
| buf[len] = '\0'; |
| |
| /* Try to create intermediate directory */ |
| if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) |
| return (-1); |
| |
| /* Is path itself a directory ? */ |
| if (p[1] == '\0') |
| return (0); |
| } |
| |
| return (1); |
| } |
| |
| static void |
| put_file(struct mg_connection *conn, const char *path) |
| { |
| struct mgstat st; |
| FILE *fp; |
| int rc; |
| |
| conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201; |
| |
| if (mg_get_header(conn, "Range")) { |
| send_error(conn, 501, "Not Implemented", |
| "%s", "Range support for PUT requests is not implemented"); |
| } else if ((rc = put_dir(path)) == 0) { |
| (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", |
| conn->request_info.status_code); |
| } else if (rc == -1) { |
| send_error(conn, 500, http_500_error, |
| "put_dir(%s): %s", path, strerror(ERRNO)); |
| } else if ((fp = mg_fopen(path, "wb+")) == NULL) { |
| send_error(conn, 500, http_500_error, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| } else { |
| set_close_on_exec(fileno(fp)); |
| if (handle_request_body(conn, fp)) |
| (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", |
| conn->request_info.status_code); |
| (void) fclose(fp); |
| } |
| } |
| |
| #if !defined(NO_SSI) |
| static void send_ssi_file(struct mg_connection *, const char *, FILE *, int); |
| |
| static void |
| do_ssi_include(struct mg_connection *conn, const char *ssi, char *tag, |
| int include_level) |
| { |
| char file_name[BUFSIZ], path[FILENAME_MAX], *p; |
| FILE *fp; |
| |
| /* |
| * sscanf() is safe here, since send_ssi_file() also uses buffer |
| * of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ. |
| */ |
| if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { |
| /* File name is relative to the webserver root */ |
| lock_option(conn->ctx, OPT_ROOT); |
| (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
| conn->ctx->options[OPT_ROOT], DIRSEP, file_name); |
| unlock_option(conn->ctx, OPT_ROOT); |
| } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) { |
| /* |
| * File name is relative to the webserver working directory |
| * or it is absolute system path |
| */ |
| (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); |
| } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) { |
| /* File name is relative to the currect document */ |
| (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); |
| if ((p = strrchr(path, DIRSEP)) != NULL) |
| p[1] = '\0'; |
| (void) mg_snprintf(conn, path + strlen(path), |
| sizeof(path) - strlen(path), "%s", file_name); |
| } else { |
| cry(conn, "Bad SSI #include: [%s]", tag); |
| return; |
| } |
| |
| if ((fp = mg_fopen(path, "rb")) == NULL) { |
| cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
| tag, path, strerror(ERRNO)); |
| } else { |
| set_close_on_exec(fileno(fp)); |
| if (match_extension(path, |
| conn->ctx->options[OPT_SSI_EXTENSIONS])) { |
| send_ssi_file(conn, path, fp, include_level + 1); |
| } else { |
| send_opened_file_stream(conn, fp, |
| UNKNOWN_CONTENT_LENGTH); |
| } |
| (void) fclose(fp); |
| } |
| } |
| |
| static void |
| do_ssi_exec(struct mg_connection *conn, char *tag) |
| { |
| char cmd[BUFSIZ]; |
| FILE *fp; |
| |
| if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { |
| cry(conn, "Bad SSI #exec: [%s]", tag); |
| } else if ((fp = popen(cmd, "r")) == NULL) { |
| cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); |
| } else { |
| send_opened_file_stream(conn, fp, UNKNOWN_CONTENT_LENGTH); |
| (void) pclose(fp); |
| } |
| } |
| |
| static void |
| send_ssi_file(struct mg_connection *conn, const char *path, FILE *fp, |
| int include_level) |
| { |
| char buf[BUFSIZ]; |
| int ch, len, in_ssi_tag; |
| |
| if (include_level > 10) { |
| cry(conn, "SSI #include level is too deep (%s)", path); |
| return; |
| } |
| |
| in_ssi_tag = FALSE; |
| len = 0; |
| |
| while ((ch = fgetc(fp)) != EOF) { |
| if (in_ssi_tag && ch == '>') { |
| in_ssi_tag = FALSE; |
| buf[len++] = ch & 0xff; |
| buf[len] = '\0'; |
| assert(len <= (int) sizeof(buf)); |
| if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { |
| /* Not an SSI tag, pass it */ |
| (void) mg_write(conn, buf, len); |
| } else { |
| if (!memcmp(buf + 5, "include", 7)) { |
| do_ssi_include(conn, path, buf + 12, |
| include_level); |
| } else if (!memcmp(buf + 5, "exec", 4)) { |
| do_ssi_exec(conn, buf + 9); |
| } else { |
| cry(conn, "%s: unknown SSI " |
| "command: \"%s\"", path, buf); |
| } |
| } |
| len = 0; |
| } else if (in_ssi_tag) { |
| if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { |
| /* Not an SSI tag */ |
| in_ssi_tag = FALSE; |
| } else if (len == (int) sizeof(buf) - 2) { |
| cry(conn, "%s: SSI tag is too large", path); |
| len = 0; |
| } |
| buf[len++] = ch & 0xff; |
| } else if (ch == '<') { |
| in_ssi_tag = TRUE; |
| if (len > 0) |
| (void) mg_write(conn, buf, len); |
| len = 0; |
| buf[len++] = ch & 0xff; |
| } else { |
| buf[len++] = ch & 0xff; |
| if (len == (int) sizeof(buf)) { |
| (void) mg_write(conn, buf, len); |
| len = 0; |
| } |
| } |
| } |
| |
| /* Send the rest of buffered data */ |
| if (len > 0) |
| (void) mg_write(conn, buf, len); |
| |
| } |
| |
| static void |
| send_ssi(struct mg_connection *conn, const char *path) |
| { |
| FILE *fp; |
| |
| if ((fp = mg_fopen(path, "rb")) == NULL) { |
| send_error(conn, 500, http_500_error, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| } else { |
| set_close_on_exec(fileno(fp)); |
| (void) mg_printf(conn, "%s", "HTTP/1.1 200 OK\r\n" |
| "Content-Type: text/html\r\nConnection: close\r\n\r\n"); |
| send_ssi_file(conn, path, fp, 0); |
| (void) fclose(fp); |
| } |
| } |
| #endif /* !NO_SSI */ |
| |
| void |
| mg_authorize(struct mg_connection *conn) |
| { |
| conn->embedded_auth = TRUE; |
| } |
| |
| static bool_t |
| check_embedded_authorization(struct mg_connection *conn) |
| { |
| const struct callback *cb; |
| bool_t authorized; |
| |
| authorized = TRUE; |
| cb = find_callback(conn->ctx, TRUE, conn->request_info.uri, -1); |
| |
| if (cb != NULL) { |
| cb->func(conn, &conn->request_info, cb->user_data); |
| authorized = conn->embedded_auth; |
| } |
| |
| return (authorized); |
| } |
| |
| /* |
| * This is the heart of the Mongoose's logic. |
| * This function is called when the request is read, parsed and validated, |
| * and Mongoose must decide what action to take: serve a file, or |
| * a directory, or call embedded function, etcetera. |
| */ |
| static void |
| analyze_request(struct mg_connection *conn) |
| { |
| struct mg_request_info *ri = &conn->request_info; |
| char path[FILENAME_MAX], *uri = ri->uri; |
| struct mgstat st; |
| const struct callback *cb; |
| |
| if ((conn->request_info.query_string = strchr(uri, '?')) != NULL) |
| * conn->request_info.query_string++ = '\0'; |
| |
| (void) url_decode(uri, (int) strlen(uri), uri, strlen(uri) + 1, FALSE); |
| remove_double_dots_and_double_slashes(uri); |
| convert_uri_to_file_name(conn, uri, path, sizeof(path)); |
| |
| if (!check_authorization(conn, path)) { |
| send_authorization_request(conn); |
| } else if (check_embedded_authorization(conn) == FALSE) { |
| /* |
| * Embedded code failed authorization. Do nothing here, since |
| * an embedded code must handle this itself by either |
| * showing proper error message, or redirecting to some |
| * sort of login page, or something else. |
| */ |
| } else if ((cb = find_callback(conn->ctx, FALSE, uri, -1)) != NULL) { |
| if ((strcmp(ri->request_method, "POST") != 0 && |
| strcmp(ri->request_method, "PUT") != 0) || |
| handle_request_body(conn, NULL)) |
| cb->func(conn, &conn->request_info, cb->user_data); |
| } else if (strstr(path, PASSWORDS_FILE_NAME)) { |
| /* Do not allow to view passwords files */ |
| send_error(conn, 403, "Forbidden", "Access Forbidden"); |
| } else if ((!strcmp(ri->request_method, "PUT") || |
| !strcmp(ri->request_method, "DELETE")) && |
| (conn->ctx->options[OPT_AUTH_PUT] == NULL || |
| !is_authorized_for_put(conn))) { |
| send_authorization_request(conn); |
| } else if (!strcmp(ri->request_method, "PUT")) { |
| put_file(conn, path); |
| } else if (!strcmp(ri->request_method, "DELETE")) { |
| if (mg_remove(path) == 0) |
| send_error(conn, 200, "OK", ""); |
| else |
| send_error(conn, 500, http_500_error, |
| "remove(%s): %s", path, strerror(ERRNO)); |
| } else if (mg_stat(path, &st) != 0) { |
| send_error(conn, 404, "Not Found", "%s", "File not found"); |
| } else if (st.is_directory && uri[strlen(uri) - 1] != '/') { |
| (void) mg_printf(conn, |
| "HTTP/1.1 301 Moved Permanently\r\n" |
| "Location: %s/\r\n\r\n", uri); |
| } else if (st.is_directory && |
| substitute_index_file(conn, path, sizeof(path), &st) == FALSE) { |
| if (is_true(conn->ctx->options[OPT_DIR_LIST])) { |
| send_directory(conn, path); |
| } else { |
| send_error(conn, 403, "Directory Listing Denied", |
| "Directory listing denied"); |
| } |
| #if !defined(NO_CGI) |
| } else if (match_extension(path, |
| conn->ctx->options[OPT_CGI_EXTENSIONS])) { |
| if (strcmp(ri->request_method, "POST") && |
| strcmp(ri->request_method, "GET")) { |
| send_error(conn, 501, "Not Implemented", |
| "Method %s is not implemented", ri->request_method); |
| } else { |
| send_cgi(conn, path); |
| } |
| #endif /* NO_CGI */ |
| #if !defined(NO_SSI) |
| } else if (match_extension(path, |
| conn->ctx->options[OPT_SSI_EXTENSIONS])) { |
| send_ssi(conn, path); |
| #endif /* NO_SSI */ |
| } else if (is_not_modified(conn, &st)) { |
| send_error(conn, 304, "Not Modified", ""); |
| } else { |
| send_file(conn, path, &st); |
| } |
| } |
| |
| static void |
| close_all_listening_sockets(struct mg_context *ctx) |
| { |
| int i; |
| |
| for (i = 0; i < ctx->num_listeners; i++) |
| (void) closesocket(ctx->listeners[i].sock); |
| ctx->num_listeners = 0; |
| } |
| |
| static bool_t |
| set_ports_option(struct mg_context *ctx, const char *list) |
| { |
| SOCKET sock; |
| int is_ssl; |
| struct vec vec; |
| struct socket *listener; |
| |
| close_all_listening_sockets(ctx); |
| assert(ctx->num_listeners == 0); |
| |
| while ((list = next_option(list, &vec, NULL)) != NULL) { |
| |
| is_ssl = vec.ptr[vec.len - 1] == 's' ? TRUE : FALSE; |
| listener = ctx->listeners + ctx->num_listeners; |
| |
| if (ctx->num_listeners >= |
| (int) (ARRAY_SIZE(ctx->listeners) - 1)) { |
| cry(fc(ctx), "%s", "Too many listeninig sockets"); |
| return (FALSE); |
| } else if ((sock = mg_open_listening_port(ctx, |
| vec.ptr, &listener->lsa)) == INVALID_SOCKET) { |
| cry(fc(ctx), "cannot bind to %.*s", vec.len, vec.ptr); |
| return (FALSE); |
| } else if (is_ssl == TRUE && ctx->ssl_ctx == NULL) { |
| (void) closesocket(sock); |
| cry(fc(ctx), "cannot add SSL socket, please specify " |
| "-ssl_cert option BEFORE -ports option"); |
| return (FALSE); |
| } else { |
| listener->sock = sock; |
| listener->is_ssl = is_ssl; |
| ctx->num_listeners++; |
| } |
| } |
| |
| return (TRUE); |
| } |
| |
| static void |
| log_header(const struct mg_connection *conn, const char *header, FILE *fp) |
| { |
| const char *header_value; |
| |
| if ((header_value = mg_get_header(conn, header)) == NULL) { |
| (void) fprintf(fp, "%s", " -"); |
| } else { |
| (void) fprintf(fp, " \"%s\"", header_value); |
| } |
| } |
| |
| static void |
| log_access(const struct mg_connection *conn) |
| { |
| const struct mg_request_info *ri; |
| char date[64]; |
| |
| if (conn->ctx->access_log == NULL) |
| return; |
| |
| (void) strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", |
| localtime(&conn->birth_time)); |
| |
| ri = &conn->request_info; |
| |
| flockfile(conn->ctx->access_log); |
| |
| (void) fprintf(conn->ctx->access_log, |
| "%s - %s [%s] \"%s %s HTTP/%d.%d\" %d %" UINT64_FMT "u", |
| inet_ntoa(conn->client.rsa.u.sin.sin_addr), |
| ri->remote_user == NULL ? "-" : ri->remote_user, |
| date, |
| ri->request_method ? ri->request_method : "-", |
| ri->uri ? ri->uri : "-", |
| ri->http_version_major, ri->http_version_minor, |
| conn->request_info.status_code, conn->num_bytes_sent); |
| log_header(conn, "Referer", conn->ctx->access_log); |
| log_header(conn, "User-Agent", conn->ctx->access_log); |
| (void) fputc('\n', conn->ctx->access_log); |
| (void) fflush(conn->ctx->access_log); |
| |
| funlockfile(conn->ctx->access_log); |
| } |
| |
| static bool_t |
| isbyte(int n) { |
| return (n >= 0 && n <= 255); |
| } |
| |
| /* |
| * Verify given socket address against the ACL. |
| * Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. |
| */ |
| static int |
| check_acl(struct mg_context *ctx, const char *list, const struct usa *usa) |
| { |
| int a, b, c, d, n, mask, allowed; |
| char flag; |
| uint32_t acl_subnet, acl_mask, remote_ip; |
| struct vec vec; |
| |
| (void) memcpy(&remote_ip, &usa->u.sin.sin_addr, sizeof(remote_ip)); |
| |
| /* If any ACL is set, deny by default */ |
| allowed = '-'; |
| |
| while ((list = next_option(list, &vec, NULL)) != NULL) { |
| |
| mask = 32; |
| |
| if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", |
| &flag, &a, &b, &c, &d, &n) != 5) { |
| cry(fc(ctx), |
| "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
| return (-1); |
| } else if (flag != '+' && flag != '-') { |
| cry(fc(ctx), "%s: flag must be + or -: [%s]", |
| __func__, vec.ptr); |
| return (-1); |
| } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) { |
| cry(fc(ctx), |
| "%s: bad ip address: [%s]", __func__, vec.ptr); |
| return (-1); |
| } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) { |
| /* Do nothing, no mask specified */ |
| } else if (mask < 0 || mask > 32) { |
| cry(fc(ctx), "%s: bad subnet mask: %d [%s]", |
| __func__, n, vec.ptr); |
| return (-1); |
| } |
| |
| acl_subnet = (a << 24) | (b << 16) | (c << 8) | d; |
| acl_mask = mask ? 0xffffffffU << (32 - mask) : 0; |
| |
| if (acl_subnet == (ntohl(remote_ip) & acl_mask)) |
| allowed = flag; |
| } |
| |
| return (allowed == '+' ? 1 : 0); |
| } |
| |
| static void |
| add_to_set(SOCKET fd, fd_set *set, int *max_fd) |
| { |
| FD_SET(fd, set); |
| if (fd > (SOCKET) *max_fd) |
| *max_fd = (int) fd; |
| } |
| |
| /* |
| * Deallocate mongoose context, free up the resources |
| */ |
| static void |
| mg_fini(struct mg_context *ctx) |
| { |
| int i; |
| |
| close_all_listening_sockets(ctx); |
| |
| /* Wait until all threads finish */ |
| (void) pthread_mutex_lock(&ctx->thr_mutex); |
| while (ctx->num_threads > 0) |
| (void) pthread_cond_wait(&ctx->thr_cond, &ctx->thr_mutex); |
| (void) pthread_mutex_unlock(&ctx->thr_mutex); |
| |
| /* Deallocate all registered callbacks */ |
| for (i = 0; i < ctx->num_callbacks; i++) |
| if (ctx->callbacks[i].uri_regex != NULL) |
| free(ctx->callbacks[i].uri_regex); |
| |
| /* Deallocate all options */ |
| for (i = 0; i < NUM_OPTIONS; i++) |
| if (ctx->options[i] != NULL) |
| free(ctx->options[i]); |
| |
| /* Close log files */ |
| if (ctx->access_log) |
| (void) fclose(ctx->access_log); |
| if (ctx->error_log) |
| (void) fclose(ctx->error_log); |
| |
| /* Deallocate SSL context */ |
| if (ctx->ssl_ctx) |
| SSL_CTX_free(ctx->ssl_ctx); |
| |
| /* Deallocate mutexes and condvars */ |
| for (i = 0; i < NUM_OPTIONS; i++) |
| (void) pthread_mutex_destroy(&ctx->opt_mutex[i]); |
| |
| (void) pthread_mutex_destroy(&ctx->thr_mutex); |
| (void) pthread_mutex_destroy(&ctx->bind_mutex); |
| (void) pthread_cond_destroy(&ctx->thr_cond); |
| (void) pthread_cond_destroy(&ctx->empty_cond); |
| (void) pthread_cond_destroy(&ctx->full_cond); |
| |
| /* Signal mg_stop() that we're done */ |
| ctx->stop_flag = 2; |
| } |
| |
| #if !defined(_WIN32) |
| static bool_t |
| set_uid_option(struct mg_context *ctx, const char *uid) |
| { |
| struct passwd *pw; |
| int retval = FALSE; |
| |
| if ((pw = getpwnam(uid)) == NULL) |
| cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
| else if (setgid(pw->pw_gid) == -1) |
| cry(fc(ctx), "%s: setgid(%s): %s", |
| __func__, uid, strerror(errno)); |
| else if (setuid(pw->pw_uid) == -1) |
| cry(fc(ctx), "%s: setuid(%s): %s", |
| __func__, uid, strerror(errno)); |
| else |
| retval = TRUE; |
| |
| return (retval); |
| } |
| #endif /* !_WIN32 */ |
| |
| #if !defined(NO_SSL) |
| void |
| mg_set_ssl_password_callback(struct mg_context *ctx, mg_spcb_t func) |
| { |
| ctx->ssl_password_callback = func; |
| } |
| |
| static pthread_mutex_t *ssl_mutexes; |
| |
| static void |
| ssl_locking_callback(int mode, int mutex_num, const char *file, int line) |
| { |
| line = 0; /* Unused */ |
| file = NULL; /* Unused */ |
| |
| if (mode & CRYPTO_LOCK) |
| (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); |
| else |
| (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); |
| } |
| |
| static unsigned long |
| ssl_id_callback(void) |
| { |
| return ((unsigned long) pthread_self()); |
| } |
| |
| static bool_t |
| load_dll(struct mg_context *ctx, const char *dll_name, struct ssl_func *sw) |
| { |
| union {void *p; void (*fp)(void);} u; |
| void *dll_handle; |
| struct ssl_func *fp; |
| |
| if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { |
| cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); |
| return (FALSE); |
| } |
| |
| for (fp = sw; fp->name != NULL; fp++) { |
| #ifdef _WIN32 |
| /* GetProcAddress() returns pointer to function */ |
| u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); |
| #else |
| /* |
| * dlsym() on UNIX returns void *. |
| * ISO C forbids casts of data pointers to function |
| * pointers. We need to use a union to make a cast. |
| */ |
| u.p = dlsym(dll_handle, fp->name); |
| #endif /* _WIN32 */ |
| if (u.fp == NULL) { |
| cry(fc(ctx), "%s: cannot find %s", __func__, fp->name); |
| return (FALSE); |
| } else { |
| fp->ptr = u.fp; |
| } |
| } |
| |
| return (TRUE); |
| } |
| |
| /* |
| * Dynamically load SSL library. Set up ctx->ssl_ctx pointer. |
| */ |
| static bool_t |
| set_ssl_option(struct mg_context *ctx, const char *pem) |
| { |
| SSL_CTX *CTX; |
| int i, size, retval = FALSE; |
| |
| if (load_dll(ctx, SSL_LIB, ssl_sw) == FALSE || |
| load_dll(ctx, CRYPTO_LIB, crypto_sw) == FALSE) |
| return (FALSE); |
| |
| /* Initialize SSL crap */ |
| SSL_library_init(); |
| |
| if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) |
| cry(fc(ctx), "SSL_CTX_new error"); |
| else if (ctx->ssl_password_callback != NULL) |
| SSL_CTX_set_default_passwd_cb(CTX, ctx->ssl_password_callback); |
| |
| if (CTX != NULL && SSL_CTX_use_certificate_file( |
| CTX, pem, SSL_FILETYPE_PEM) == 0) |
| cry(fc(ctx), "%s: cannot open %s", __func__, pem); |
| else if (CTX != NULL && SSL_CTX_use_PrivateKey_file( |
| CTX, pem, SSL_FILETYPE_PEM) == 0) |
| cry(fc(ctx), "%s: cannot open %s", NULL, pem); |
| else |
| retval = TRUE; |
| |
| /* |
| * Initialize locking callbacks, needed for thread safety. |
| * http://www.openssl.org/support/faq.html#PROG1 |
| */ |
| size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); |
| if ((ssl_mutexes = (pthread_mutex_t *) malloc(size)) == NULL) { |
| cry(fc(ctx), "%s: cannot allocate mutexes", __func__); |
| return (FALSE); |
| } |
| |
| for (i = 0; i < CRYPTO_num_locks(); i++) |
| pthread_mutex_init(&ssl_mutexes[i], NULL); |
| |
| CRYPTO_set_locking_callback(&ssl_locking_callback); |
| CRYPTO_set_id_callback(&ssl_id_callback); |
| |
| /* Done with everything. Save the context. */ |
| ctx->ssl_ctx = CTX; |
| |
| return (retval); |
| } |
| #endif /* !NO_SSL */ |
| |
| static bool_t |
| open_log_file(struct mg_context *ctx, FILE **fpp, const char *path) |
| { |
| bool_t retval = TRUE; |
| |
| if (*fpp != NULL) |
| (void) fclose(*fpp); |
| |
| if (path == NULL) { |
| *fpp = NULL; |
| } else if ((*fpp = mg_fopen(path, "a")) == NULL) { |
| cry(fc(ctx), "%s(%s): %s", __func__, path, strerror(errno)); |
| retval = FALSE; |
| } else { |
| set_close_on_exec(fileno(*fpp)); |
| } |
| |
| return (retval); |
| } |
| |
| static bool_t |
| set_alog_option(struct mg_context *ctx, const char *path) |
| { |
| return (open_log_file(ctx, &ctx->access_log, path)); |
| } |
| |
| static bool_t |
| set_elog_option(struct mg_context *ctx, const char *path) |
| { |
| return (open_log_file(ctx, &ctx->error_log, path)); |
| } |
| |
| static bool_t |
| set_gpass_option(struct mg_context *ctx, const char *path) |
| { |
| struct mgstat mgstat; |
| ctx = NULL; |
| return (mg_stat(path, &mgstat) == 0); |
| } |
| |
| static bool_t |
| set_max_threads_option(struct mg_context *ctx, const char *str) |
| { |
| ctx->max_threads = atoi(str); |
| return (TRUE); |
| } |
| |
| static bool_t |
| set_acl_option(struct mg_context *ctx, const char *acl) |
| { |
| struct usa fake; |
| |
| return (check_acl(ctx, acl, &fake) != -1); |
| } |
| |
| static void admin_page(struct mg_connection *, |
| const struct mg_request_info *, void *); |
| static bool_t |
| set_admin_uri_option(struct mg_context *ctx, const char *uri) |
| { |
| mg_set_uri_callback(ctx, uri, &admin_page, NULL); |
| return (TRUE); |
| } |
| |
| /* |
| * Check if the comma-separated list of options has a format of key-value |
| * pairs: "k1=v1,k2=v2". Return FALSE if any entry has invalid key or value. |
| */ |
| static bool_t |
| set_kv_list_option(struct mg_context *ctx, const char *str) |
| { |
| const char *list; |
| struct vec key, value; |
| |
| list = str; |
| while ((list = next_option(list, &key, &value)) != NULL) |
| if (key.len == 0 || value.len == 0) { |
| cry(fc(ctx), "Invalid list specified: [%s], " |
| "expecting key1=value1,key2=value2,...", str); |
| return (FALSE); |
| } |
| |
| return (TRUE); |
| } |
| |
| static const struct mg_option known_options[] = { |
| {"root", "\tWeb root directory", NULL, OPT_ROOT, NULL}, |
| {"index_files", "Index files", "index.html,index.htm,index.cgi", |
| OPT_INDEX_FILES, NULL}, |
| #if !defined(NO_SSL) |
| {"ssl_cert", "SSL certificate file", NULL, |
| OPT_SSL_CERTIFICATE, &set_ssl_option}, |
| #endif /* !NO_SSL */ |
| {"ports", "Listening ports", NULL, |
| OPT_PORTS, &set_ports_option}, |
| {"dir_list", "Directory listing", "yes", |
| OPT_DIR_LIST, NULL}, |
| {"protect", "URI to htpasswd mapping", NULL, |
| OPT_PROTECT, &set_kv_list_option}, |
| #if !defined(NO_CGI) |
| {"cgi_ext", "CGI extensions", ".cgi,.pl,.php", |
| OPT_CGI_EXTENSIONS, NULL}, |
| {"cgi_interp", "CGI interpreter to use with all CGI scripts", NULL, |
| OPT_CGI_INTERPRETER, NULL}, |
| {"cgi_env", "Custom CGI enviroment variables", NULL, |
| OPT_CGI_ENV, &set_kv_list_option}, |
| #endif /* NO_CGI */ |
| {"ssi_ext", "SSI extensions", ".shtml,.shtm", |
| OPT_SSI_EXTENSIONS, NULL}, |
| {"auth_realm", "Authentication domain name", "mydomain.com", |
| OPT_AUTH_DOMAIN, NULL}, |
| {"auth_gpass", "Global passwords file", NULL, |
| OPT_AUTH_GPASSWD, &set_gpass_option}, |
| {"auth_PUT", "PUT,DELETE auth file", NULL, |
| OPT_AUTH_PUT, NULL}, |
| #if !defined(_WIN32) |
| {"uid", "\tRun as user", NULL, OPT_UID, &set_uid_option}, |
| #endif /* !_WIN32 */ |
| {"access_log", "Access log file", NULL, |
| OPT_ACCESS_LOG, &set_alog_option}, |
| {"error_log", "Error log file", NULL, |
| OPT_ERROR_LOG, &set_elog_option}, |
| {"aliases", "Path=URI mappings", NULL, |
| OPT_ALIASES, &set_kv_list_option}, |
| {"admin_uri", "Administration page URI", NULL, |
| OPT_ADMIN_URI, &set_admin_uri_option}, |
| {"acl", "\tAllow/deny IP addresses/subnets", NULL, |
| OPT_ACL, &set_acl_option}, |
| {"max_threads", "Maximum simultaneous threads to spawn", "100", |
| OPT_MAX_THREADS, &set_max_threads_option}, |
| {"idle_time", "Time in seconds connection stays idle", "10", |
| OPT_IDLE_TIME, NULL}, |
| {"mime_types", "Comma separated list of ext=mime_type pairs", NULL, |
| OPT_MIME_TYPES, &set_kv_list_option}, |
| {NULL, NULL, NULL, 0, NULL} |
| }; |
| |
| static const struct mg_option * |
| find_opt(const char *opt_name) |
| { |
| int i; |
| |
| for (i = 0; known_options[i].name != NULL; i++) |
| if (!strcmp(opt_name, known_options[i].name)) |
| return (known_options + i); |
| |
| return (NULL); |
| } |
| |
| int |
| mg_set_option(struct mg_context *ctx, const char *opt, const char *val) |
| { |
| const struct mg_option *option; |
| int i, retval; |
| |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: [%s]->[%s]", __func__, opt, val)); |
| if (opt != NULL && (option = find_opt(opt)) != NULL) { |
| i = (int) (option - known_options); |
| lock_option(ctx, i); |
| |
| if (option->setter != NULL) |
| retval = option->setter(ctx, val); |
| else |
| retval = TRUE; |
| |
| /* Free old value if any */ |
| if (ctx->options[option->index] != NULL) |
| free(ctx->options[option->index]); |
| |
| /* Set new option value */ |
| ctx->options[option->index] = val ? mg_strdup(val) : NULL; |
| unlock_option(ctx, i); |
| |
| if (retval == FALSE) |
| cry(fc(ctx), "%s(%s): failure", __func__, opt); |
| } else { |
| cry(fc(ctx), "%s: No such option: [%s]", __func__, opt); |
| retval = -1; |
| } |
| |
| return (retval); |
| } |
| |
| void |
| mg_show_usage_string(FILE *fp) |
| { |
| const struct mg_option *o; |
| |
| (void) fprintf(stderr, |
| "Mongoose version %s (c) Sergey Lyubka\n" |
| "usage: mongoose [options] [config_file]\n", mg_version()); |
| |
| fprintf(fp, " -A <htpasswd_file> <realm> <user> <passwd>\n"); |
| |
| for (o = known_options; o->name != NULL; o++) { |
| (void) fprintf(fp, " -%s\t%s", o->name, o->description); |
| if (o->default_value != NULL) |
| fprintf(fp, " (default: \"%s\")", o->default_value); |
| fputc('\n', fp); |
| } |
| } |
| |
| const char * |
| mg_get_option(const struct mg_context *ctx, const char *option_name) |
| { |
| const struct mg_option *option; |
| |
| if ((option = find_opt(option_name)) != NULL) |
| return (ctx->options[option->index]); |
| else |
| return (NULL); |
| } |
| |
| static void |
| admin_page(struct mg_connection *conn, const struct mg_request_info *ri, |
| void *user_data) |
| { |
| const struct mg_option *option; |
| const char *option_name, *option_value; |
| |
| user_data = NULL; /* Unused */ |
| |
| (void) mg_printf(conn, |
| "HTTP/1.1 200 OK\r\n" |
| "Content-Type: text/html\r\n\r\n" |
| "<html><body><h1>Mongoose v. %s</h1>", mg_version()); |
| |
| if (!strcmp(ri->request_method, "POST")) { |
| option_name = mg_get_var(conn, "o"); |
| option_value = mg_get_var(conn, "v"); |
| if (mg_set_option(conn->ctx, |
| option_name, option_value) == -1) { |
| (void) mg_printf(conn, |
| "<p style=\"background: red\">Error setting " |
| "option \"%s\"</p>", |
| option_name ? option_name : "(null)"); |
| } else { |
| (void) mg_printf(conn, |
| "<p style=\"color: green\">Saved: %s=%s</p>", |
| option_name, option_value ? option_value : "NULL"); |
| } |
| } |
| |
| /* Print table with all options */ |
| (void) mg_printf(conn, "%s", "<table border=\"1\"" |
| "<tr><th>Option</th><th>Description</th>" |
| "<th colspan=2>Value</th></tr>"); |
| |
| for (option = known_options; option->name != NULL; option++) { |
| option_value = mg_get_option(conn->ctx, option->name); |
| if (option_value == NULL) |
| option_value = ""; |
| (void) mg_printf(conn, |
| "<form method=post><tr><td>%s</td><td>%s</td>" |
| "<input type=hidden name=o value='%s'>" |
| "<td><input type=text name=v value='%s'></td>" |
| "<td><input type=submit value=save></td></form></tr>", |
| option->name, option->description, |
| option->name, option_value); |
| } |
| |
| (void) mg_printf(conn, "%s", "</table></body></html>"); |
| } |
| |
| static void |
| reset_per_request_attributes(struct mg_connection *conn) |
| { |
| if (conn->request_info.remote_user != NULL) { |
| free((void *) conn->request_info.remote_user); |
| conn->request_info.remote_user = NULL; |
| } |
| if (conn->free_post_data && conn->request_info.post_data != NULL) { |
| free((void *) conn->request_info.post_data); |
| conn->request_info.post_data = NULL; |
| } |
| } |
| |
| static void |
| close_socket_gracefully(struct mg_connection *conn, SOCKET sock) |
| { |
| char buf[BUFSIZ]; |
| int n; |
| |
| /* Send FIN to the client */ |
| (void) shutdown(sock, SHUT_WR); |
| set_non_blocking_mode(conn, sock); |
| |
| /* |
| * Read and discard pending data. If we do not do that and close the |
| * socket, the data in the send buffer may be discarded. This |
| * behaviour is seen on Windows, when client keeps sending data |
| * when server decide to close the connection; then when client |
| * does recv() it gets no data back. |
| */ |
| do { |
| n = pull(NULL, sock, NULL, buf, sizeof(buf)); |
| } while (n > 0); |
| |
| /* Now we know that our FIN is ACK-ed, safe to close */ |
| (void) closesocket(sock); |
| } |
| |
| static void |
| close_connection(struct mg_connection *conn) |
| { |
| reset_per_request_attributes(conn); |
| |
| if (conn->ssl) |
| SSL_free(conn->ssl); |
| |
| if (conn->client.sock != INVALID_SOCKET) |
| close_socket_gracefully(conn, conn->client.sock); |
| } |
| |
| static void |
| reset_connection_attributes(struct mg_connection *conn) |
| { |
| reset_per_request_attributes(conn); |
| conn->free_post_data = FALSE; |
| conn->request_info.status_code = -1; |
| conn->num_bytes_sent = 0; |
| (void) memset(&conn->request_info, 0, sizeof(conn->request_info)); |
| } |
| |
| static void |
| shift_to_next(struct mg_connection *conn, char *buf, int req_len, int *nread) |
| { |
| uint64_t cl; |
| int over_len, body_len; |
| |
| cl = get_content_length(conn); |
| over_len = *nread - req_len; |
| assert(over_len >= 0); |
| |
| if (cl == UNKNOWN_CONTENT_LENGTH) { |
| body_len = 0; |
| } else if (cl < (uint64_t) over_len) { |
| body_len = (int) cl; |
| } else { |
| body_len = over_len; |
| } |
| |
| *nread -= req_len + body_len; |
| (void) memmove(buf, buf + req_len + body_len, *nread); |
| } |
| |
| static void |
| process_new_connection(struct mg_connection *conn) |
| { |
| struct mg_request_info *ri = &conn->request_info; |
| char buf[MAX_REQUEST_SIZE]; |
| int request_len, nread; |
| |
| nread = 0; |
| reset_connection_attributes(conn); |
| |
| /* If next request is not pipelined, read it in */ |
| if ((request_len = get_request_len(buf, (size_t) nread)) == 0) |
| request_len = read_request(NULL, conn->client.sock, |
| conn->ssl, buf, sizeof(buf), &nread); |
| assert(nread >= request_len); |
| |
| if (request_len <= 0) |
| return; /* Remote end closed the connection */ |
| |
| /* 0-terminate the request: parse_request uses sscanf */ |
| buf[request_len - 1] = '\0'; |
| |
| if (parse_http_request(buf, ri, &conn->client.rsa)) { |
| if (ri->http_version_major != 1 || |
| (ri->http_version_major == 1 && |
| (ri->http_version_minor < 0 || |
| ri->http_version_minor > 1))) { |
| send_error(conn, 505, |
| "HTTP version not supported", |
| "%s", "Weird HTTP version"); |
| log_access(conn); |
| } else { |
| ri->post_data = buf + request_len; |
| ri->post_data_len = nread - request_len; |
| conn->birth_time = time(NULL); |
| analyze_request(conn); |
| log_access(conn); |
| shift_to_next(conn, buf, request_len, &nread); |
| } |
| } else { |
| /* Do not put garbage in the access log */ |
| send_error(conn, 400, "Bad Request", |
| "Can not parse request: [%.*s]", nread, buf); |
| } |
| |
| } |
| |
| /* |
| * Worker threads take accepted socket from the queue |
| */ |
| static bool_t |
| get_socket(struct mg_context *ctx, struct socket *sp) |
| { |
| struct timespec ts; |
| |
| (void) pthread_mutex_lock(&ctx->thr_mutex); |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: thread %p: going idle", |
| __func__, (void *) pthread_self())); |
| |
| /* If the queue is empty, wait. We're idle at this point. */ |
| ctx->num_idle++; |
| while (ctx->sq_head == ctx->sq_tail) { |
| ts.tv_nsec = 0; |
| #ifdef OS_POSIX |
| ts.tv_sec = time(NULL) + atoi(ctx->options[OPT_IDLE_TIME]) + 1; |
| #elif _WIN32 |
| ts.tv_sec = (long) (time(NULL) + atoi(ctx->options[OPT_IDLE_TIME]) + 1); |
| #endif |
| if (pthread_cond_timedwait(&ctx->empty_cond, |
| &ctx->thr_mutex, &ts) != 0) { |
| /* Timeout! release the mutex and return */ |
| (void) pthread_mutex_unlock(&ctx->thr_mutex); |
| return (FALSE); |
| } |
| } |
| assert(ctx->sq_head > ctx->sq_tail); |
| |
| /* We're going busy now: got a socket to process! */ |
| ctx->num_idle--; |
| |
| /* Copy socket from the queue and increment tail */ |
| *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; |
| ctx->sq_tail++; |
| DEBUG_TRACE((DEBUG_MGS_PREFIX |
| "%s: thread %p grabbed socket %d, going busy", |
| __func__, (void *) pthread_self(), sp->sock)); |
| |
| /* Wrap pointers if needed */ |
| while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { |
| ctx->sq_tail -= ARRAY_SIZE(ctx->queue); |
| ctx->sq_head -= ARRAY_SIZE(ctx->queue); |
| } |
| |
| pthread_cond_signal(&ctx->full_cond); |
| (void) pthread_mutex_unlock(&ctx->thr_mutex); |
| |
| return (TRUE); |
| } |
| |
| static void |
| worker_thread(struct mg_context *ctx) |
| { |
| struct mg_connection conn; |
| |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: thread %p starting", |
| __func__, (void *) pthread_self())); |
| |
| (void) memset(&conn, 0, sizeof(conn)); |
| |
| while (get_socket(ctx, &conn.client) == TRUE) { |
| conn.birth_time = time(NULL); |
| conn.ctx = ctx; |
| |
| if (conn.client.is_ssl && |
| (conn.ssl = SSL_new(conn.ctx->ssl_ctx)) == NULL) { |
| cry(&conn, "%s: SSL_new: %d", __func__, ERRNO); |
| } else if (conn.client.is_ssl && |
| SSL_set_fd(conn.ssl, conn.client.sock) != 1) { |
| cry(&conn, "%s: SSL_set_fd: %d", __func__, ERRNO); |
| } else if (conn.client.is_ssl && SSL_accept(conn.ssl) != 1) { |
| cry(&conn, "%s: SSL handshake error", __func__); |
| } else { |
| process_new_connection(&conn); |
| } |
| |
| close_connection(&conn); |
| } |
| |
| /* Signal master that we're done with connection and exiting */ |
| pthread_mutex_lock(&conn.ctx->thr_mutex); |
| conn.ctx->num_threads--; |
| conn.ctx->num_idle--; |
| pthread_cond_signal(&conn.ctx->thr_cond); |
| assert(conn.ctx->num_threads >= 0); |
| pthread_mutex_unlock(&conn.ctx->thr_mutex); |
| |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: thread %p exiting", |
| __func__, (void *) pthread_self())); |
| } |
| |
| /* |
| * Master thread adds accepted socket to a queue |
| */ |
| static void |
| put_socket(struct mg_context *ctx, const struct socket *sp) |
| { |
| (void) pthread_mutex_lock(&ctx->thr_mutex); |
| |
| /* If the queue is full, wait */ |
| while (ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) |
| (void) pthread_cond_wait(&ctx->full_cond, &ctx->thr_mutex); |
| assert(ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)); |
| |
| /* Copy socket to the queue and increment head */ |
| ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; |
| ctx->sq_head++; |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: queued socket %d", |
| __func__, sp->sock)); |
| |
| /* If there are no idle threads, start one */ |
| if (ctx->num_idle == 0 && ctx->num_threads < ctx->max_threads) { |
| if (start_thread(ctx, |
| (mg_thread_func_t) worker_thread, ctx) != 0) |
| cry(fc(ctx), "Cannot start thread: %d", ERRNO); |
| else |
| ctx->num_threads++; |
| } |
| |
| pthread_cond_signal(&ctx->empty_cond); |
| (void) pthread_mutex_unlock(&ctx->thr_mutex); |
| } |
| |
| static void |
| accept_new_connection(const struct socket *listener, struct mg_context *ctx) |
| { |
| struct socket accepted; |
| |
| accepted.rsa.len = sizeof(accepted.rsa.u.sin); |
| accepted.lsa = listener->lsa; |
| if ((accepted.sock = accept(listener->sock, |
| &accepted.rsa.u.sa, &accepted.rsa.len)) == INVALID_SOCKET) |
| return; |
| |
| lock_option(ctx, OPT_ACL); |
| if (ctx->options[OPT_ACL] != NULL && |
| !check_acl(ctx, ctx->options[OPT_ACL], &accepted.rsa)) { |
| cry(fc(ctx), "%s: %s is not allowed to connect", |
| __func__, inet_ntoa(accepted.rsa.u.sin.sin_addr)); |
| (void) closesocket(accepted.sock); |
| unlock_option(ctx, OPT_ACL); |
| return; |
| } |
| unlock_option(ctx, OPT_ACL); |
| |
| /* Put accepted socket structure into the queue */ |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: accepted socket %d", |
| __func__, accepted.sock)); |
| accepted.is_ssl = listener->is_ssl; |
| put_socket(ctx, &accepted); |
| } |
| |
| static void |
| master_thread(struct mg_context *ctx) |
| { |
| fd_set read_set; |
| struct timeval tv; |
| int i, max_fd; |
| |
| while (ctx->stop_flag == 0) { |
| FD_ZERO(&read_set); |
| max_fd = -1; |
| |
| /* Add listening sockets to the read set */ |
| lock_option(ctx, OPT_PORTS); |
| for (i = 0; i < ctx->num_listeners; i++) |
| add_to_set(ctx->listeners[i].sock, &read_set, &max_fd); |
| unlock_option(ctx, OPT_PORTS); |
| |
| tv.tv_sec = 1; |
| tv.tv_usec = 0; |
| |
| if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) { |
| #ifdef _WIN32 |
| /* |
| * On windows, if read_set and write_set are empty, |
| */ |
| sleep(1); |
| #endif /* _WIN32 */ |
| } else { |
| lock_option(ctx, OPT_PORTS); |
| for (i = 0; i < ctx->num_listeners; i++) |
| if (FD_ISSET(ctx->listeners[i].sock, &read_set)) |
| accept_new_connection( |
| ctx->listeners + i, ctx); |
| unlock_option(ctx, OPT_PORTS); |
| } |
| } |
| |
| /* Stop signal received: somebody called mg_stop. Quit. */ |
| mg_fini(ctx); |
| } |
| |
| void |
| mg_stop(struct mg_context *ctx) |
| { |
| ctx->stop_flag = 1; |
| |
| /* Wait until mg_fini() stops */ |
| while (ctx->stop_flag != 2) |
| (void) sleep(1); |
| |
| assert(ctx->num_threads == 0); |
| free(ctx); |
| |
| #if defined(_WIN32) |
| (void) WSACleanup(); |
| #endif /* _WIN32 */ |
| } |
| |
| struct mg_context * |
| mg_start(void) |
| { |
| struct mg_context *ctx; |
| const struct mg_option *option; |
| char web_root[FILENAME_MAX]; |
| int i; |
| |
| #if defined(_WIN32) |
| WSADATA data; |
| WSAStartup(MAKEWORD(2,2), &data); |
| #endif /* _WIN32 */ |
| |
| if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) { |
| cry(fc(ctx), "cannot allocate mongoose context"); |
| return (NULL); |
| } |
| |
| ctx->error_log = stderr; |
| mg_set_log_callback(ctx, builtin_error_log); |
| |
| /* Initialize options. First pass: set default option values */ |
| for (option = known_options; option->name != NULL; option++) |
| ctx->options[option->index] = option->default_value == NULL ? |
| NULL : mg_strdup(option->default_value); |
| |
| /* Call setter functions */ |
| for (option = known_options; option->name != NULL; option++) |
| if (option->setter != NULL && |
| ctx->options[option->index] != NULL) |
| if (option->setter(ctx, |
| ctx->options[option->index]) == FALSE) { |
| mg_fini(ctx); |
| return (NULL); |
| } |
| |
| /* Initial document root is set to current working directory */ |
| if (ctx->options[OPT_ROOT] == NULL) { |
| if (mg_getcwd(web_root, sizeof(web_root)) == NULL) { |
| cry(fc(ctx), "%s: getcwd: %s", |
| __func__, strerror(errno)); |
| mg_strlcpy(web_root, ".", sizeof(web_root)); |
| } |
| ctx->options[OPT_ROOT] = mg_strdup(web_root); |
| } |
| |
| DEBUG_TRACE((DEBUG_MGS_PREFIX "%s: root [%s]", |
| __func__, ctx->options[OPT_ROOT])); |
| |
| #if !defined(_WIN32) |
| /* |
| * Ignore SIGPIPE signal, so if browser cancels the request, it |
| * won't kill the whole process. |
| */ |
| (void) signal(SIGPIPE, SIG_IGN); |
| #endif /* _WIN32 */ |
| |
| /* Initialize options mutexes */ |
| for (i = 0; i < NUM_OPTIONS; i++) |
| (void) pthread_mutex_init(&ctx->opt_mutex[i], NULL); |
| |
| (void) pthread_mutex_init(&ctx->thr_mutex, NULL); |
| (void) pthread_mutex_init(&ctx->bind_mutex, NULL); |
| (void) pthread_cond_init(&ctx->thr_cond, NULL); |
| (void) pthread_cond_init(&ctx->empty_cond, NULL); |
| (void) pthread_cond_init(&ctx->full_cond, NULL); |
| |
| /* Start master (listening) thread */ |
| start_thread(ctx, (mg_thread_func_t) master_thread, ctx); |
| |
| return (ctx); |
| } |
| |