X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fhttpd.c;h=72b03de792b0671fd5619485caa0ae11fad18541;hb=6111a8f2e737fea9147cb3fb21613d32d34788bd;hp=9c3c8586168d7a7c9fe08c4375980ca0b6433a07;hpb=8b8c75e6abc9283cbdbe6a76e0c4db6098f73ed8;p=oweals%2Fbusybox.git diff --git a/networking/httpd.c b/networking/httpd.c index 9c3c85861..72b03de79 100644 --- a/networking/httpd.c +++ b/networking/httpd.c @@ -24,6 +24,9 @@ * server changes directory to the location of the script and executes it * after setting QUERY_STRING and other environment variables. * + * Doc: + * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html + * * The server can also be invoked as a url arg decoder and html text encoder * as follows: * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World" @@ -88,23 +91,18 @@ * */ - #include "busybox.h" +/* amount of buffering in a pipe */ +#ifndef PIPE_BUF +# define PIPE_BUF 4096 +#endif static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004"; static const char default_path_httpd_conf[] = "/etc"; static const char httpd_conf[] = "httpd.conf"; static const char home[] = "./"; -#ifdef CONFIG_LFS -# define cont_l_fmt "%lld" -# define cont_l_type (long long) -#else -# define cont_l_fmt "%ld" -# define cont_l_type (long) -#endif - #define TIMEOUT 60 // Note: busybox xfuncs are not used because we want the server to keep running @@ -113,10 +111,7 @@ static const char home[] = "./"; // is checked rigorously //#define DEBUG 1 - -#ifndef DEBUG -# define DEBUG 0 -#endif +#define DEBUG 0 #define MAX_MEMORY_BUFF 8192 /* IO buffer */ @@ -146,39 +141,31 @@ typedef struct { const char *configFile; unsigned int rmt_ip; -#if defined(CONFIG_FEATURE_HTTPD_CGI) || DEBUG - char rmt_ip_str[16]; /* for set env REMOTE_ADDR */ +#if ENABLE_FEATURE_HTTPD_CGI || DEBUG + char *rmt_ip_str; /* for set env REMOTE_ADDR */ #endif unsigned port; /* server initial port and for set env REMOTE_PORT */ - union HTTPD_FOUND { - const char *found_mime_type; - const char *found_moved_temporarily; - } httpd_found; + const char *found_mime_type; + const char *found_moved_temporarily; off_t ContentLength; /* -1 - unknown */ time_t last_mod; Htaccess_IP *ip_a_d; /* config allow/deny lines */ int flg_deny_all; -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH Htaccess *auth; /* config user:password lines */ #endif -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES Htaccess *mime_a; /* config mime types */ #endif -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD + int server_socket; int accepted_socket; -# define a_c_r config->accepted_socket -# define a_c_w config->accepted_socket -#else -# define a_c_r 0 -# define a_c_w 1 -#endif volatile int alarm_signaled; -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR Htaccess *script_i; /* config script interpreters */ #endif } HttpdConfig; @@ -209,8 +196,7 @@ static const char* const suffixTable [] = { 0, "application/octet-stream" /* default */ }; -typedef enum -{ +typedef enum { HTTP_OK = 200, HTTP_MOVED_TEMPORARILY = 302, HTTP_BAD_REQUEST = 400, /* malformed syntax */ @@ -237,8 +223,7 @@ typedef enum #endif } HttpResponseNum; -typedef struct -{ +typedef struct { HttpResponseNum type; const char *name; const char *info; @@ -251,7 +236,7 @@ static const HttpEnumString httpResponseNames[] = { "No request appeared within a reasonable time period." }, { HTTP_NOT_IMPLEMENTED, "Not Implemented", "The requested method is not recognized by this server." }, -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH { HTTP_UNAUTHORIZED, "Unauthorized", "" }, #endif { HTTP_NOT_FOUND, "Not Found", @@ -274,11 +259,12 @@ static const HttpEnumString httpResponseNames[] = { static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT"; -static const char Content_length[] = "Content-length:"; -static int -scan_ip (const char **ep, unsigned int *ip, unsigned char endc) +#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1) + + +static int scan_ip(const char **ep, unsigned int *ip, unsigned char endc) { const char *p = *ep; int auto_mask = 8; @@ -315,8 +301,7 @@ scan_ip (const char **ep, unsigned int *ip, unsigned char endc) return auto_mask; } -static int -scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask) +static int scan_ip_mask(const char *ipm, unsigned int *ip, unsigned int *mask) { int i; unsigned int msk; @@ -329,20 +314,20 @@ scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask) i = 0; while (*p) { - if (*p < '0' || *p > '9') { - if (*p == '.') { - i = scan_ip (&ipm, mask, 0); - return i != 32; - } - return -1; + if (*p < '0' || *p > '9') { + if (*p == '.') { + i = scan_ip(&ipm, mask, 0); + return i != 32; } - i *= 10; - i += *p - '0'; - p++; + return -1; + } + i *= 10; + i += *p - '0'; + p++; } } if (i > 32 || i < 0) - return -1; + return -1; msk = 0x80000000; *mask = 0; while (i > 0) { @@ -353,7 +338,9 @@ scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask) return 0; } -#if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR static void free_config_lines(Htaccess **pprev) { Htaccess *prev = *pprev; @@ -401,9 +388,12 @@ static void free_config_lines(Htaccess **pprev) static void parse_conf(const char *path, int flag) { FILE *f; -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH - Htaccess *prev, *cur; -#elif CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH + Htaccess *prev; +#endif +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR Htaccess *cur; #endif @@ -425,16 +415,18 @@ static void parse_conf(const char *path, int flag) config->flg_deny_all = 0; -#if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR) +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR /* retain previous auth and mime config only for subdir parse */ if (flag != SUBDIR_PARSE) { -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH free_config_lines(&config->auth); #endif -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES free_config_lines(&config->mime_a); #endif -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR free_config_lines(&config->script_i); #endif } @@ -461,11 +453,11 @@ static void parse_conf(const char *path, int flag) cf = httpd_conf; } -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH prev = config->auth; #endif /* This could stand some work */ - while ( (p0 = fgets(buf, sizeof(buf), f)) != NULL) { + while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) { c = NULL; for (p = p0; *p0 != 0 && *p0 != '#'; p0++) { if (!isspace(*p0)) { @@ -494,22 +486,22 @@ static void parse_conf(const char *path, int flag) if (*p0 == 'a') *p0 = 'A'; else if (*p0 != 'D' && *p0 != 'A' -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH && *p0 != '/' #endif -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES && *p0 != '.' #endif -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR && *p0 != '*' #endif ) continue; if (*p0 == 'A' || *p0 == 'D') { /* storing current config IP line */ - pip = calloc(1, sizeof(Htaccess_IP)); + pip = xzalloc(sizeof(Htaccess_IP)); if (pip) { - if (scan_ip_mask (c, &(pip->ip), &(pip->mask))) { + if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) { /* syntax IP{/mask} error detected, protect all */ *p0 = 'D'; pip->mask = 0; @@ -534,7 +526,7 @@ static void parse_conf(const char *path, int flag) } continue; } -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH if (*p0 == '/') { /* make full path from httpd root / curent_path / config_line_path */ cf = flag == SUBDIR_PARSE ? path : ""; @@ -557,7 +549,7 @@ static void parse_conf(const char *path, int flag) } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) { ++cf; if (p > p0) { - while (*--p != '/'); /* omit previous dir */ + while (*--p != '/') /* omit previous dir */; } continue; } @@ -574,15 +566,17 @@ static void parse_conf(const char *path, int flag) } #endif -#if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR) +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \ + || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR /* storing current config line */ - cur = calloc(1, sizeof(Htaccess) + strlen(p0)); + cur = xzalloc(sizeof(Htaccess) + strlen(p0)); if (cur) { cf = strcpy(cur->before_colon, p0); c = strchr(cf, ':'); *c++ = 0; cur->after_colon = c; -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES if (*cf == '.') { /* config .mime line move top for overwrite previous */ cur->next = config->mime_a; @@ -590,7 +584,7 @@ static void parse_conf(const char *path, int flag) continue; } #endif -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR if (*cf == '*' && cf[1] == '.') { /* config script interpreter line move top for overwrite previous */ cur->next = config->script_i; @@ -598,7 +592,7 @@ static void parse_conf(const char *path, int flag) continue; } #endif -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH free(p0); if (prev == NULL) { /* first line */ @@ -636,7 +630,7 @@ static void parse_conf(const char *path, int flag) fclose(f); } -#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR +#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR /**************************************************************************** * > $Function: encodeString() @@ -659,20 +653,19 @@ static char *encodeString(const char *string) /* take the simple route and encode everything */ /* could possibly scan once to get length. */ int len = strlen(string); - char *out = malloc(len * 6 + 1); + char *out = xmalloc(len * 6 + 1); char *p = out; char ch; - if (!out) return ""; while ((ch = *string++)) { // very simple check for what to encode if (isalnum(ch)) *p++ = ch; else p += sprintf(p, "&#%d;", (unsigned char) ch); } - *p = 0; + *p = '\0'; return out; } -#endif /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */ +#endif /* FEATURE_HTTPD_ENCODE_URL_STR */ /**************************************************************************** * @@ -686,94 +679,72 @@ static char *encodeString(const char *string) * * $Parameters: * (char *) string . . . The first string to decode. - * (int) flag . . . 1 if require decode '+' as ' ' for CGI + * (int) option_d . . 1 if called for httpd -d * * $Return: (char *) . . . . A pointer to the decoded string (same as input). * * $Errors: None * ****************************************************************************/ -static char *decodeString(char *orig, int flag_plus_to_space) +static char *decodeString(char *orig, int option_d) { /* note that decoded string is always shorter than original */ char *string = orig; char *ptr = string; + char c; - while (*ptr) { - if (*ptr == '+' && flag_plus_to_space) { *string++ = ' '; ptr++; } - else if (*ptr != '%') *string++ = *ptr++; - else { - unsigned int value1, value2; - - ptr++; - if (sscanf(ptr, "%1X", &value1) != 1 || - sscanf(ptr+1, "%1X", &value2) != 1) { - if (!flag_plus_to_space) - return NULL; - *string++ = '%'; - } else { - value1 = value1 * 16 + value2; - if (value1 == '/' || value1 == 0) - return orig+1; - *string++ = value1; - ptr += 2; - } + while ((c = *ptr++) != '\0') { + unsigned value1, value2; + + if (option_d && c == '+') { + *string++ = ' '; + continue; } + if (c != '%') { + *string++ = c; + continue; + } + if (sscanf(ptr, "%1X", &value1) != 1 + || sscanf(ptr+1, "%1X", &value2) != 1 + ) { + if (!option_d) + return NULL; + *string++ = '%'; + continue; + } + value1 = value1 * 16 + value2; + if (!option_d && (value1 == '/' || value1 == '\0')) { + /* caller takes it as indication of invalid + * (dangerous wrt exploits) chars */ + return orig + 1; + } + *string++ = value1; + ptr += 2; } *string = '\0'; return orig; } -#ifdef CONFIG_FEATURE_HTTPD_CGI +#if ENABLE_FEATURE_HTTPD_CGI /**************************************************************************** - * - > $Function: addEnv() - * - * $Description: Add an environment variable setting to the global list. - * A NAME=VALUE string is allocated, filled, and added to the list of - * environment settings passed to the cgi execution script. - * - * $Parameters: - * (char *) name_before_underline - The first part environment variable name. - * (char *) name_after_underline - The second part environment variable name. - * (char *) value . . The value to which the env variable is set. - * - * $Return: (void) - * - * $Errors: Silently returns if the env runs out of space to hold the new item - * + * setenv helpers ****************************************************************************/ -static void addEnv(const char *name_before_underline, - const char *name_after_underline, const char *value) +static void setenv1(const char *name, const char *value) { - char *s = NULL; - const char *underline; - if (!value) value = ""; - underline = *name_after_underline ? "_" : ""; - asprintf(&s, "%s%s%s=%s", name_before_underline, underline, - name_after_underline, value); - if (s) { - putenv(s); - } + setenv(name, value, 1); } - -#if defined(CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV) || defined(CONFIG_FEATURE_HTTPD_WITHOUT_INETD) -/* set environs SERVER_PORT and REMOTE_PORT */ -static void addEnvPort(const char *port_name) +static void setenv_long(const char *name, long value) { - char buf[16]; - - sprintf(buf, "%u", config->port); - addEnv(port_name, "PORT", buf); + char buf[sizeof(value)*3 + 1]; + sprintf(buf, "%ld", value); + setenv(name, buf, 1); } #endif -#endif /* CONFIG_FEATURE_HTTPD_CGI */ - -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH /**************************************************************************** * > $Function: decodeBase64() @@ -832,7 +803,6 @@ static void decodeBase64(char *Data) #endif -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD /**************************************************************************** * > $Function: openServer() @@ -846,30 +816,13 @@ static void decodeBase64(char *Data) ****************************************************************************/ static int openServer(void) { - struct sockaddr_in lsocket; int fd; - int on = 1; /* create the socket right now */ - /* inet_addr() returns a value that is already in network order */ - memset(&lsocket, 0, sizeof(lsocket)); - lsocket.sin_family = AF_INET; - lsocket.sin_addr.s_addr = INADDR_ANY; - lsocket.sin_port = htons(config->port); - fd = xsocket(AF_INET, SOCK_STREAM, 0); - /* tell the OS it's OK to reuse a previous address even though */ - /* it may still be in a close down state. Allows bind to succeed. */ -#ifdef SO_REUSEPORT - setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ; -#else - setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ; -#endif - xbind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket)); + fd = create_and_bind_stream_or_die(NULL, config->port); xlisten(fd, 9); - signal(SIGCHLD, SIG_IGN); /* prevent zombie (defunct) processes */ return fd; } -#endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */ /**************************************************************************** * @@ -892,13 +845,15 @@ static int sendHeaders(HttpResponseNum responseNum) const char *responseString = ""; const char *infoString = 0; const char *mime_type; - unsigned int i; + unsigned i; time_t timer = time(0); char timeStr[80]; int len; + enum { + numNames = sizeof(httpResponseNames) / sizeof(httpResponseNames[0]) + }; - for (i = 0; - i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) { + for (i = 0; i < numNames; i++) { if (httpResponseNames[i].type == responseNum) { responseString = httpResponseNames[i].name; infoString = httpResponseNames[i].info; @@ -907,32 +862,33 @@ static int sendHeaders(HttpResponseNum responseNum) } /* error message is HTML */ mime_type = responseNum == HTTP_OK ? - config->httpd_found.found_mime_type : "text/html"; + config->found_mime_type : "text/html"; /* emit the current date */ strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer)); len = sprintf(buf, - "HTTP/1.0 %d %s\r\nContent-type: %s\r\n" - "Date: %s\r\nConnection: close\r\n", + "HTTP/1.0 %d %s\r\nContent-type: %s\r\n" + "Date: %s\r\nConnection: close\r\n", responseNum, responseString, mime_type, timeStr); -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH if (responseNum == HTTP_UNAUTHORIZED) { - len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n", - config->realm); + len += sprintf(buf+len, + "WWW-Authenticate: Basic realm=\"%s\"\r\n", + config->realm); } #endif if (responseNum == HTTP_MOVED_TEMPORARILY) { len += sprintf(buf+len, "Location: %s/%s%s\r\n", - config->httpd_found.found_moved_temporarily, + config->found_moved_temporarily, (config->query ? "?" : ""), (config->query ? config->query : "")); } if (config->ContentLength != -1) { /* file */ strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod)); - len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n", - timeStr, Content_length, cont_l_type config->ContentLength); + len += sprintf(buf+len, "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n", + timeStr, "Content-length:", config->ContentLength); } strcat(buf, "\r\n"); len += 2; @@ -943,10 +899,11 @@ static int sendHeaders(HttpResponseNum responseNum) responseNum, responseString, responseNum, responseString, infoString); } -#if DEBUG - fprintf(stderr, "Headers: '%s'", buf); -#endif - return full_write(a_c_w, buf, len); + if (DEBUG) + fprintf(stderr, "headers: '%s'\n", buf); + i = config->accepted_socket; + if (i == 0) i++; /* write to fd# 1 in inetd mode */ + return full_write(i, buf, len); } /**************************************************************************** @@ -962,23 +919,23 @@ static int sendHeaders(HttpResponseNum responseNum) ****************************************************************************/ static int getLine(void) { - int count = 0; + int count = 0; char *buf = config->buf; - while (read(a_c_r, buf + count, 1) == 1) { + while (read(config->accepted_socket, buf + count, 1) == 1) { if (buf[count] == '\r') continue; if (buf[count] == '\n') { buf[count] = 0; return count; } - if (count < (MAX_MEMORY_BUFF-1)) /* check owerflow */ + if (count < (MAX_MEMORY_BUFF-1)) /* check overflow */ count++; } if (count) return count; else return -1; } -#ifdef CONFIG_FEATURE_HTTPD_CGI +#if ENABLE_FEATURE_HTTPD_CGI /**************************************************************************** * > $Function: sendCgi() @@ -994,7 +951,6 @@ static int getLine(void) * (int bodyLen) . . . . . . . . Length of the post body. * (const char *cookie) . . . . . For set HTTP_COOKIE. * (const char *content_type) . . For set CONTENT_TYPE. - * * $Return: (char *) . . . . A pointer to the decoded string (same as input). * @@ -1002,8 +958,8 @@ static int getLine(void) * ****************************************************************************/ static int sendCgi(const char *url, - const char *request, int bodyLen, const char *cookie, - const char *content_type) + const char *request, int bodyLen, const char *cookie, + const char *content_type) { int fromCgi[2]; /* pipe for reading data from CGI */ int toCgi[2]; /* pipe for sending data to CGI */ @@ -1012,268 +968,322 @@ static int sendCgi(const char *url, int pid = 0; int inFd; int outFd; - int firstLine = 1; - - do { - if (pipe(fromCgi) != 0) { - break; - } - if (pipe(toCgi) != 0) { - break; - } - - pid = fork(); - if (pid < 0) { - pid = 0; - break; - } + int buf_count; + int status; + size_t post_read_size, post_read_idx; - if (!pid) { - /* child process */ - char *script; - char *purl = strdup(url); - char realpath_buff[MAXPATHLEN]; - - if (purl == NULL) - _exit(242); - - inFd = toCgi[0]; - outFd = fromCgi[1]; + if (pipe(fromCgi) != 0) + return 0; + if (pipe(toCgi) != 0) + return 0; - dup2(inFd, 0); // replace stdin with the pipe - dup2(outFd, 1); // replace stdout with the pipe - if (!DEBUG) - dup2(outFd, 2); // replace stderr with the pipe - - close(toCgi[0]); - close(toCgi[1]); - close(fromCgi[0]); - close(fromCgi[1]); - - /* - * Find PATH_INFO. - */ - script = purl; - while ((script = strchr(script + 1, '/')) != NULL) { - /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */ - struct stat sb; - - *script = '\0'; - if (is_directory(purl + 1, 1, &sb) == 0) { - /* not directory, found script.cgi/PATH_INFO */ - *script = '/'; - break; - } - *script = '/'; /* is directory, find next '/' */ - } - addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */ - addEnv("PATH", "", getenv("PATH")); - addEnv("REQUEST", "METHOD", request); - if (config->query) { - char *uri = alloca(strlen(purl) + 2 + strlen(config->query)); - if (uri) - sprintf(uri, "%s?%s", purl, config->query); - addEnv("REQUEST", "URI", uri); - } else { - addEnv("REQUEST", "URI", purl); - } - if (script != NULL) - *script = '\0'; /* reduce /PATH_INFO */ - /* SCRIPT_FILENAME required by PHP in CGI mode */ - if (realpath(purl + 1, realpath_buff)) - addEnv("SCRIPT", "FILENAME", realpath_buff); - else - *realpath_buff = 0; - /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */ - addEnv("SCRIPT_NAME", "", purl); - addEnv("QUERY_STRING", "", config->query); - addEnv("SERVER", "SOFTWARE", httpdVersion); - addEnv("SERVER", "PROTOCOL", "HTTP/1.0"); - addEnv("GATEWAY_INTERFACE", "", "CGI/1.1"); - addEnv("REMOTE", "ADDR", config->rmt_ip_str); -#ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV - addEnvPort("REMOTE"); +/* + * Note: We can use vfork() here in the no-mmu case, although + * the child modifies the parent's variables, due to: + * 1) The parent does not use the child-modified variables. + * 2) The allocated memory (in the child) is freed when the process + * exits. This happens instantly after the child finishes, + * since httpd is run from inetd (and it can't run standalone + * in uClinux). + */ +#ifdef BB_NOMMU + pid = vfork(); +#else + pid = fork(); #endif - if (bodyLen) { - char sbl[32]; + if (pid < 0) + return 0; - sprintf(sbl, "%d", bodyLen); - addEnv("CONTENT", "LENGTH", sbl); - } - if (cookie) - addEnv("HTTP", "COOKIE", cookie); - if (content_type) - addEnv("CONTENT", "TYPE", content_type); -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH - if (config->remoteuser) { - addEnv("REMOTE", "USER", config->remoteuser); - addEnv("AUTH_TYPE", "", "Basic"); + if (!pid) { + /* child process */ + char *script; + char *purl; + char realpath_buff[MAXPATHLEN]; + + if (config->accepted_socket > 1) + close(config->accepted_socket); + if (config->server_socket > 1) + close(config->server_socket); + + dup2(toCgi[0], 0); // replace stdin with the pipe + dup2(fromCgi[1], 1); // replace stdout with the pipe + /* Huh? User seeing stderr can be a security problem... + * and if CGI really wants that, it can always dup2(1,2)... + if (!DEBUG) + dup2(fromCgi[1], 2); // replace stderr with the pipe + */ + /* I think we cannot inadvertently close 0, 1 here... */ + close(toCgi[0]); + close(toCgi[1]); + close(fromCgi[0]); + close(fromCgi[1]); + + /* + * Find PATH_INFO. + */ + xfunc_error_retval = 242; + purl = xstrdup(url); + script = purl; + while ((script = strchr(script + 1, '/')) != NULL) { + /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */ + struct stat sb; + + *script = '\0'; + if (is_directory(purl + 1, 1, &sb) == 0) { + /* not directory, found script.cgi/PATH_INFO */ + *script = '/'; + break; } + *script = '/'; /* is directory, find next '/' */ + } + setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */ + /* setenv1("PATH", getenv("PATH")); redundant */ + setenv1("REQUEST_METHOD", request); + if (config->query) { + char *uri = alloca(strlen(purl) + 2 + strlen(config->query)); + if (uri) + sprintf(uri, "%s?%s", purl, config->query); + setenv1("REQUEST_URI", uri); + } else { + setenv1("REQUEST_URI", purl); + } + if (script != NULL) + *script = '\0'; /* cut off /PATH_INFO */ + /* SCRIPT_FILENAME required by PHP in CGI mode */ + if (!realpath(purl + 1, realpath_buff)) + goto error_execing_cgi; + setenv1("SCRIPT_FILENAME", realpath_buff); + /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */ + setenv1("SCRIPT_NAME", purl); + /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html: + * QUERY_STRING: The information which follows the ? in the URL + * which referenced this script. This is the query information. + * It should not be decoded in any fashion. This variable + * should always be set when there is query information, + * regardless of command line decoding. */ + /* (Older versions of bbox seem to do some decoding) */ + setenv1("QUERY_STRING", config->query); + setenv1("SERVER_SOFTWARE", httpdVersion); + putenv((char*)"SERVER_PROTOCOL=HTTP/1.0"); + putenv((char*)"GATEWAY_INTERFACE=CGI/1.1"); + /* Having _separate_ variables for IP and port defeats + * the purpose of having socket abstraction. Which "port" + * are you using on Unix domain socket? + * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense. + * Oh well... */ + { + char *p = config->rmt_ip_str ? : (char*)""; + char *cp = strrchr(p, ':'); + if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']')) + cp = NULL; + if (cp) *cp = '\0'; /* delete :PORT */ + setenv1("REMOTE_ADDR", p); + } +#if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV + setenv_long("REMOTE_PORT", config->port); +#endif + if (bodyLen) + setenv_long("CONTENT_LENGTH", bodyLen); + if (cookie) + setenv1("HTTP_COOKIE", cookie); + if (content_type) + setenv1("CONTENT_TYPE", content_type); +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH + if (config->remoteuser) { + setenv1("REMOTE_USER", config->remoteuser); + putenv((char*)"AUTH_TYPE=Basic"); + } #endif - if (config->referer) - addEnv("HTTP", "REFERER", config->referer); - - /* set execve argp[0] without path */ - argp[0] = strrchr(purl, '/') + 1; - /* but script argp[0] must have absolute path and chdiring to this */ - if (*realpath_buff) { - script = strrchr(realpath_buff, '/'); - if (script) { - *script = '\0'; - if (chdir(realpath_buff) == 0) { - // now run the program. If it fails, - // use _exit() so no destructors - // get called and make a mess. -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR - char *interpr = NULL; - char *suffix = strrchr(purl, '.'); - - if (suffix) { - Htaccess * cur; - for (cur = config->script_i; cur; cur = cur->next) - if (strcmp(cur->before_colon + 1, suffix) == 0) { - interpr = cur->after_colon; - break; - } - } -#endif - *script = '/'; -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR - if (interpr) - execv(interpr, argp); - else -#endif - execv(realpath_buff, argp); + if (config->referer) + setenv1("HTTP_REFERER", config->referer); + + /* set execve argp[0] without path */ + argp[0] = strrchr(purl, '/') + 1; + /* but script argp[0] must have absolute path and chdiring to this */ + script = strrchr(realpath_buff, '/'); + if (!script) + goto error_execing_cgi; + *script = '\0'; + if (chdir(realpath_buff) == 0) { + // Now run the program. If it fails, + // use _exit() so no destructors + // get called and make a mess. +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR + char *interpr = NULL; + char *suffix = strrchr(purl, '.'); + + if (suffix) { + Htaccess *cur; + for (cur = config->script_i; cur; cur = cur->next) { + if (strcmp(cur->before_colon + 1, suffix) == 0) { + interpr = cur->after_colon; + break; } } } -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD - config->accepted_socket = 1; /* send to stdout */ #endif - sendHeaders(HTTP_NOT_FOUND); - _exit(242); - } /* end child */ + *script = '/'; +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR + if (interpr) + execv(interpr, argp); + else +#endif + execv(realpath_buff, argp); + } + error_execing_cgi: + /* send to stdout (even if we are not from inetd) */ + config->accepted_socket = 1; + sendHeaders(HTTP_NOT_FOUND); + _exit(242); + } /* end child */ - } while (0); + /* parent process */ - if (pid) { - /* parent process */ - int status; - size_t post_readed_size = 0, post_readed_idx = 0; + buf_count = 0; + post_read_size = 0; + post_read_idx = 0; /* for gcc */ + inFd = fromCgi[0]; + outFd = toCgi[1]; + close(fromCgi[1]); + close(toCgi[0]); + signal(SIGPIPE, SIG_IGN); - inFd = fromCgi[0]; - outFd = toCgi[1]; - close(fromCgi[1]); - close(toCgi[0]); - signal(SIGPIPE, SIG_IGN); - - while (1) { - fd_set readSet; - fd_set writeSet; - char wbuf[128]; - int nfound; - int count; - - FD_ZERO(&readSet); - FD_ZERO(&writeSet); - FD_SET(inFd, &readSet); - if (bodyLen > 0 || post_readed_size > 0) { - FD_SET(outFd, &writeSet); - nfound = outFd > inFd ? outFd : inFd; - if (post_readed_size == 0) { - FD_SET(a_c_r, &readSet); - if (nfound < a_c_r) - nfound = a_c_r; - } - /* Now wait on the set of sockets! */ - nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL); - } else { - if (!bodyLen) { - close(outFd); - bodyLen = -1; - } - nfound = select(inFd + 1, &readSet, 0, 0, NULL); + while (1) { + fd_set readSet; + fd_set writeSet; + char wbuf[128]; + int nfound; + int count; + + FD_ZERO(&readSet); + FD_ZERO(&writeSet); + FD_SET(inFd, &readSet); + if (bodyLen > 0 || post_read_size > 0) { + FD_SET(outFd, &writeSet); + nfound = outFd > inFd ? outFd : inFd; + if (post_read_size == 0) { + FD_SET(config->accepted_socket, &readSet); + if (nfound < config->accepted_socket) + nfound = config->accepted_socket; + } + /* Now wait on the set of sockets! */ + nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL); + } else { + if (!bodyLen) { + close(outFd); /* no more POST data to CGI */ + bodyLen = -1; } + nfound = select(inFd + 1, &readSet, NULL, NULL, NULL); + } - if (nfound <= 0) { - if (waitpid(pid, &status, WNOHANG) > 0) { - close(inFd); -#if DEBUG - if (WIFEXITED(status)) - bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status)); - if (WIFSIGNALED(status)) - bb_error_msg("piped has exited with signal=%d", WTERMSIG(status)); -#endif - break; - } - } else if (post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) { - count = full_write(outFd, wbuf + post_readed_idx, post_readed_size); - if (count > 0) { - post_readed_size -= count; - post_readed_idx += count; - if (post_readed_size == 0) - post_readed_idx = 0; - } else { - post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */ - } - } else if (bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) { - count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen; - count = safe_read(a_c_r, wbuf, count); - if (count > 0) { - post_readed_size += count; - bodyLen -= count; - } else { - bodyLen = 0; /* closed */ - } + if (nfound <= 0) { + if (waitpid(pid, &status, WNOHANG) <= 0) { + /* Weird. CGI didn't exit and no fd's + * are ready, yet select returned?! */ + continue; } - if (FD_ISSET(inFd, &readSet)) { - int s = a_c_w; - char *rbuf = config->buf; + close(inFd); + if (DEBUG && WIFEXITED(status)) + bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status)); + if (DEBUG && WIFSIGNALED(status)) + bb_error_msg("piped has exited with signal=%d", WTERMSIG(status)); + break; + } -#ifndef PIPE_BUF -# define PIPESIZE 4096 /* amount of buffering in a pipe */ -#else -# define PIPESIZE PIPE_BUF -#endif + if (post_read_size > 0 && FD_ISSET(outFd, &writeSet)) { + /* Have data from peer and can write to CGI */ + // huh? why full_write? what if we will block? + // (imagine that CGI does not read its stdin...) + count = full_write(outFd, wbuf + post_read_idx, post_read_size); + if (count > 0) { + post_read_idx += count; + post_read_size -= count; + } else { + post_read_size = bodyLen = 0; /* broken pipe to CGI */ + } + } else if (bodyLen > 0 && post_read_size == 0 + && FD_ISSET(config->accepted_socket, &readSet) + ) { + /* We expect data, prev data portion is eaten by CGI + * and there *is* data to read from the peer + * (POSTDATA?) */ + count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen; + count = safe_read(config->accepted_socket, wbuf, count); + if (count > 0) { + post_read_size = count; + post_read_idx = 0; + bodyLen -= count; + } else { + bodyLen = 0; /* closed */ + } + } + +#define PIPESIZE PIPE_BUF #if PIPESIZE >= MAX_MEMORY_BUFF # error "PIPESIZE >= MAX_MEMORY_BUFF" #endif - - // There is something to read - count = safe_read(inFd, rbuf, PIPESIZE); - if (count == 0) + if (FD_ISSET(inFd, &readSet)) { + /* There is something to read from CGI */ + int s = config->accepted_socket; + char *rbuf = config->buf; + + /* Are we still buffering CGI output? */ + if (buf_count >= 0) { + static const char HTTP_200[] = "HTTP/1.0 200 OK\r\n"; + /* Must use safe_read, not full_read, because + * CGI may output a few first bytes and then wait + * for POSTDATA without closing stdout. + * With full_read we may wait here forever. */ + count = safe_read(inFd, rbuf + buf_count, PIPESIZE - 4); + if (count <= 0) { + /* eof (or error) and there was no "HTTP", + * so add one and write out the received data */ + if (buf_count) { + full_write(s, HTTP_200, sizeof(HTTP_200)-1); + full_write(s, rbuf, buf_count); + } break; /* closed */ - if (count > 0) { - if (firstLine) { - rbuf[count] = 0; - /* check to see if the user script added headers */ - if (strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) { - full_write(s, "HTTP/1.0 200 OK\r\n", 17); - } - if (strstr(rbuf, "ontent-") == 0) { - full_write(s, "Content-type: text/plain\r\n\r\n", 28); - } - firstLine = 0; + } + buf_count += count; + count = 0; + if (buf_count >= 4) { + /* check to see if CGI added "HTTP" */ + if (memcmp(rbuf, HTTP_200, 4) != 0) { + /* there is no "HTTP", do it ourself */ + if (full_write(s, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1) + break; } - if (full_write(s, rbuf, count) != count) - break; - -#if DEBUG - fprintf(stderr, "cgi read %d bytes\n", count); -#endif + /* example of valid CGI without "Content-type:" + * echo -en "HTTP/1.0 302 Found\r\n" + * echo -en "Location: http://www.busybox.net\r\n" + * echo -en "\r\n" + if (!strstr(rbuf, "ontent-")) { + full_write(s, "Content-type: text/plain\r\n\r\n", 28); + } + */ + count = buf_count; + buf_count = -1; /* buffering off */ } + } else { + count = safe_read(inFd, rbuf, PIPESIZE); + if (count <= 0) + break; /* eof (or error) */ } - } - } + if (full_write(s, rbuf, count) != count) + break; + if (DEBUG) + fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf); + } /* if (FD_ISSET(inFd)) */ + } /* while (1) */ return 0; } -#endif /* CONFIG_FEATURE_HTTPD_CGI */ +#endif /* FEATURE_HTTPD_CGI */ /**************************************************************************** * > $Function: sendFile() * - * $Description: Send a file response to an HTTP request + * $Description: Send a file response to a HTTP request * * $Parameter: * (const char *) url . . The URL requested. @@ -1297,24 +1307,23 @@ static int sendFile(const char *url) break; } /* also, if not found, set default as "application/octet-stream"; */ - config->httpd_found.found_mime_type = *(table+1); -#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES + config->found_mime_type = table[1]; +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES if (suffix) { Htaccess * cur; for (cur = config->mime_a; cur; cur = cur->next) { if (strcmp(cur->before_colon, suffix) == 0) { - config->httpd_found.found_mime_type = cur->after_colon; + config->found_mime_type = cur->after_colon; break; } } } -#endif /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */ +#endif /* FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */ -#if DEBUG - fprintf(stderr, "Sending file '%s' Content-type: %s\n", - url, config->httpd_found.found_mime_type); -#endif + if (DEBUG) + fprintf(stderr, "sending file '%s' content-type: %s\n", + url, config->found_mime_type); f = open(url, O_RDONLY); if (f >= 0) { @@ -1322,15 +1331,17 @@ static int sendFile(const char *url) char *buf = config->buf; sendHeaders(HTTP_OK); + /* TODO: sendfile() */ while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) { - if (full_write(a_c_w, buf, count) != count) + int fd = config->accepted_socket; + if (fd == 0) fd++; /* write to fd# 1 in inetd mode */ + if (full_write(fd, buf, count) != count) break; } close(f); } else { -#if DEBUG - bb_perror_msg("Unable to open '%s'", url); -#endif + if (DEBUG) + bb_perror_msg("cannot open '%s'", url); sendHeaders(HTTP_NOT_FOUND); } @@ -1343,17 +1354,20 @@ static int checkPermIP(void) /* This could stand some work */ for (cur = config->ip_a_d; cur; cur = cur->next) { -#if DEBUG +#if ENABLE_FEATURE_HTTPD_CGI && DEBUG fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str); +#endif +#if DEBUG fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n", - (unsigned char)(cur->ip >> 24), - (unsigned char)(cur->ip >> 16), - (unsigned char)(cur->ip >> 8), - cur->ip & 0xff, - (unsigned char)(cur->mask >> 24), - (unsigned char)(cur->mask >> 16), - (unsigned char)(cur->mask >> 8), - cur->mask & 0xff); + (unsigned char)(cur->ip >> 24), + (unsigned char)(cur->ip >> 16), + (unsigned char)(cur->ip >> 8), + (unsigned char)(cur->ip), + (unsigned char)(cur->mask >> 24), + (unsigned char)(cur->mask >> 16), + (unsigned char)(cur->mask >> 8), + (unsigned char)(cur->mask) + ); #endif if ((config->rmt_ip & cur->mask) == cur->ip) return cur->allow_deny == 'A'; /* Allow/Deny */ @@ -1380,7 +1394,7 @@ static int checkPermIP(void) * ****************************************************************************/ -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH static int checkPerm(const char *path, const char *request) { Htaccess * cur; @@ -1391,67 +1405,64 @@ static int checkPerm(const char *path, const char *request) /* This could stand some work */ for (cur = config->auth; cur; cur = cur->next) { + size_t l; + p0 = cur->before_colon; if (prev != NULL && strcmp(prev, p0) != 0) continue; /* find next identical */ p = cur->after_colon; -#if DEBUG - fprintf(stderr,"checkPerm: '%s' ? '%s'\n", p0, request); -#endif - { - size_t l = strlen(p0); - - if (strncmp(p0, path, l) == 0 && - (l == 1 || path[l] == '/' || path[l] == 0)) { - char *u; - /* path match found. Check request */ - /* for check next /path:user:password */ - prev = p0; - u = strchr(request, ':'); - if (u == NULL) { - /* bad request, ':' required */ - break; - } + if (DEBUG) + fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request); + + l = strlen(p0); + if (strncmp(p0, path, l) == 0 + && (l == 1 || path[l] == '/' || path[l] == '\0') + ) { + char *u; + /* path match found. Check request */ + /* for check next /path:user:password */ + prev = p0; + u = strchr(request, ':'); + if (u == NULL) { + /* bad request, ':' required */ + break; + } -#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5 - { - char *cipher; - char *pp; + if (ENABLE_FEATURE_HTTPD_AUTH_MD5) { + char *cipher; + char *pp; if (strncmp(p, request, u-request) != 0) { - /* user uncompared */ - continue; - } - pp = strchr(p, ':'); - if (pp && pp[1] == '$' && pp[2] == '1' && - pp[3] == '$' && pp[4]) { - pp++; - cipher = pw_encrypt(u+1, pp); - if (strcmp(cipher, pp) == 0) - goto set_remoteuser_var; /* Ok */ - /* unauthorized */ - continue; - } + /* user uncompared */ + continue; } -#endif - if (strcmp(p, request) == 0) { -#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5 -set_remoteuser_var: -#endif - config->remoteuser = strdup(request); - if (config->remoteuser) - config->remoteuser[(u - request)] = 0; - return 1; /* Ok */ + pp = strchr(p, ':'); + if (pp && pp[1] == '$' && pp[2] == '1' && + pp[3] == '$' && pp[4]) { + pp++; + cipher = pw_encrypt(u+1, pp); + if (strcmp(cipher, pp) == 0) + goto set_remoteuser_var; /* Ok */ + /* unauthorized */ + continue; } - /* unauthorized */ } + + if (strcmp(p, request) == 0) { +set_remoteuser_var: + config->remoteuser = strdup(request); + if (config->remoteuser) + config->remoteuser[(u - request)] = 0; + return 1; /* Ok */ + } + /* unauthorized */ } } /* for */ return prev == NULL; } -#endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */ +#endif /* FEATURE_HTTPD_BASIC_AUTH */ /**************************************************************************** * @@ -1463,8 +1474,8 @@ set_remoteuser_var: static void handle_sigalrm(int sig) { - sendHeaders(HTTP_REQUEST_TIMEOUT); - config->alarm_signaled = sig; + sendHeaders(HTTP_REQUEST_TIMEOUT); + config->alarm_signaled = sig; } /**************************************************************************** @@ -1483,9 +1494,9 @@ static void handleIncoming(void) char *test; struct stat sb; int ip_allowed; -#ifdef CONFIG_FEATURE_HTTPD_CGI +#if ENABLE_FEATURE_HTTPD_CGI const char *prequest = request_GET; - long length=0; + unsigned long length = 0; char *cookie = 0; char *content_type = 0; #endif @@ -1494,8 +1505,8 @@ static void handleIncoming(void) int retval; struct sigaction sa; -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH - int credentials = -1; /* if not requred this is Ok */ +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH + int credentials = -1; /* if not required this is Ok */ #endif sa.sa_handler = handle_sigalrm; @@ -1512,12 +1523,12 @@ static void handleIncoming(void) purl = strpbrk(buf, " \t"); if (purl == NULL) { -BAD_REQUEST: + BAD_REQUEST: sendHeaders(HTTP_BAD_REQUEST); break; } - *purl = 0; -#ifdef CONFIG_FEATURE_HTTPD_CGI + *purl = '\0'; +#if ENABLE_FEATURE_HTTPD_CGI if (strcasecmp(buf, prequest) != 0) { prequest = "POST"; if (strcasecmp(buf, prequest) != 0) { @@ -1538,7 +1549,7 @@ BAD_REQUEST: /* Garbled request/URL */ goto BAD_REQUEST; } - url = alloca(strlen(buf) + 12); /* + sizeof("/index.html\0") */ + url = alloca(strlen(buf) + sizeof("/index.html")); if (url == NULL) { sendHeaders(HTTP_INTERNAL_SERVER_ERROR); break; @@ -1546,55 +1557,60 @@ BAD_REQUEST: strcpy(url, buf); /* extract url args if present */ test = strchr(url, '?'); + config->query = NULL; if (test) { - *test++ = 0; + *test++ = '\0'; config->query = test; } test = decodeString(url, 0); if (test == NULL) goto BAD_REQUEST; - if (test == (buf+1)) { + if (test == url+1) { + /* '/' or NUL is encoded */ sendHeaders(HTTP_NOT_FOUND); break; } + /* algorithm stolen from libbb bb_simplify_path(), - but don`t strdup and reducing trailing slash and protect out root */ + but don't strdup and reducing trailing slash and protect out root */ purl = test = url; - do { if (*purl == '/') { - if (*test == '/') { /* skip duplicate (or initial) slash */ + /* skip duplicate (or initial) slash */ + if (*test == '/') { continue; - } else if (*test == '.') { - if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */ + } + if (*test == '.') { + /* skip extra '.' */ + if (test[1] == '/' || test[1] == 0) { continue; - } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) { + } else + /* '..': be careful */ + if (test[1] == '.' && (test[2] == '/' || test[2] == 0)) { ++test; if (purl == url) { /* protect out root */ goto BAD_REQUEST; } - while (*--purl != '/'); /* omit previous dir */ - continue; + while (*--purl != '/') /* omit previous dir */; + continue; } } } *++purl = *test; } while (*++test); - - *++purl = 0; /* so keep last character */ - test = purl; /* end ptr */ + *++purl = '\0'; /* so keep last character */ + test = purl; /* end ptr */ /* If URL is directory, adding '/' */ if (test[-1] != '/') { if (is_directory(url + 1, 1, &sb)) { - config->httpd_found.found_moved_temporarily = url; + config->found_moved_temporarily = url; } } -#if DEBUG - fprintf(stderr, "url='%s', args=%s\n", url, config->query); -#endif + if (DEBUG) + fprintf(stderr, "url='%s', args=%s\n", url, config->query); test = url; ip_allowed = checkPermIP(); @@ -1609,151 +1625,169 @@ BAD_REQUEST: *test = '/'; } if (blank >= 0) { - // read until blank line for HTTP version specified, else parse immediate + /* read until blank line for HTTP version specified, else parse immediate */ while (1) { alarm(TIMEOUT); count = getLine(); if (count <= 0) break; -#if DEBUG - fprintf(stderr, "Header: '%s'\n", buf); -#endif + if (DEBUG) + fprintf(stderr, "header: '%s'\n", buf); -#ifdef CONFIG_FEATURE_HTTPD_CGI +#if ENABLE_FEATURE_HTTPD_CGI /* try and do our best to parse more lines */ - if ((strncasecmp(buf, Content_length, 15) == 0)) { - if (prequest != request_GET) - length = strtol(buf + 15, 0, 0); // extra read only for POST - } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) { - for (test = buf + 7; isspace(*test); test++) - ; - cookie = strdup(test); - } else if ((strncasecmp(buf, "Content-Type:", 13) == 0)) { - for (test = buf + 13; isspace(*test); test++) - ; - content_type = strdup(test); - } else if ((strncasecmp(buf, "Referer:", 8) == 0)) { - for (test = buf + 8; isspace(*test); test++) - ; - config->referer = strdup(test); + if ((STRNCASECMP(buf, "Content-length:") == 0)) { + /* extra read only for POST */ + if (prequest != request_GET) { + test = buf + sizeof("Content-length:")-1; + if (!test[0]) + goto bail_out; + errno = 0; + /* not using strtoul: it ignores leading munis! */ + length = strtol(test, &test, 10); + /* length is "ulong", but we need to pass it to int later */ + /* so we check for negative or too large values in one go: */ + /* (long -> ulong conv caused negatives to be seen as > INT_MAX) */ + if (test[0] || errno || length > INT_MAX) + goto bail_out; + } + } else if ((STRNCASECMP(buf, "Cookie:") == 0)) { + cookie = strdup(skip_whitespace(buf + sizeof("Cookie:")-1)); + } else if ((STRNCASECMP(buf, "Content-Type:") == 0)) { + content_type = strdup(skip_whitespace(buf + sizeof("Content-Type:")-1)); + } else if ((STRNCASECMP(buf, "Referer:") == 0)) { + config->referer = strdup(skip_whitespace(buf + sizeof("Referer:")-1)); } #endif -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH - if (strncasecmp(buf, "Authorization:", 14) == 0) { +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH + if (STRNCASECMP(buf, "Authorization:") == 0) { /* We only allow Basic credentials. * It shows up as "Authorization: Basic " where * the userid:password is base64 encoded. */ - for (test = buf + 14; isspace(*test); test++) - ; - if (strncasecmp(test, "Basic", 5) != 0) + test = skip_whitespace(buf + sizeof("Authorization:")-1); + if (STRNCASECMP(test, "Basic") != 0) continue; - - test += 5; /* decodeBase64() skiping space self */ + test += sizeof("Basic")-1; + /* decodeBase64() skips whitespace itself */ decodeBase64(test); credentials = checkPerm(url, test); } -#endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */ +#endif /* FEATURE_HTTPD_BASIC_AUTH */ } /* while extra header reading */ } - (void) alarm(0); + alarm(0); if (config->alarm_signaled) break; if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) { - /* protect listing [/path]/httpd_conf or IP deny */ -#ifdef CONFIG_FEATURE_HTTPD_CGI -FORBIDDEN: /* protect listing /cgi-bin */ + /* protect listing [/path]/httpd_conf or IP deny */ +#if ENABLE_FEATURE_HTTPD_CGI + FORBIDDEN: /* protect listing /cgi-bin */ #endif sendHeaders(HTTP_FORBIDDEN); break; } -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH +#if ENABLE_FEATURE_HTTPD_BASIC_AUTH if (credentials <= 0 && checkPerm(url, ":") == 0) { sendHeaders(HTTP_UNAUTHORIZED); break; } #endif - if (config->httpd_found.found_moved_temporarily) { + if (config->found_moved_temporarily) { sendHeaders(HTTP_MOVED_TEMPORARILY); -#if DEBUG /* clear unforked memory flag */ - config->httpd_found.found_moved_temporarily = NULL; -#endif + config->found_moved_temporarily = NULL; break; } test = url + 1; /* skip first '/' */ -#ifdef CONFIG_FEATURE_HTTPD_CGI - /* if strange Content-Length */ - if (length < 0) - break; - +#if ENABLE_FEATURE_HTTPD_CGI if (strncmp(test, "cgi-bin", 7) == 0) { if (test[7] == '/' && test[8] == 0) - goto FORBIDDEN; // protect listing cgi-bin/ + goto FORBIDDEN; /* protect listing cgi-bin/ */ sendCgi(url, prequest, length, cookie, content_type); - } else { - if (prequest != request_GET) - sendHeaders(HTTP_NOT_IMPLEMENTED); - else { -#endif /* CONFIG_FEATURE_HTTPD_CGI */ - if (purl[-1] == '/') - strcpy(purl, "index.html"); - if (stat(test, &sb) == 0) { - config->ContentLength = sb.st_size; - config->last_mod = sb.st_mtime; + break; + } +#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR + { + char *suffix = strrchr(test, '.'); + if (suffix) { + Htaccess *cur; + for (cur = config->script_i; cur; cur = cur->next) { + if (strcmp(cur->before_colon + 1, suffix) == 0) { + sendCgi(url, prequest, length, cookie, content_type); + goto bail_out; + } } - sendFile(test); -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD - /* unset if non inetd looped */ - config->ContentLength = -1; -#endif - -#ifdef CONFIG_FEATURE_HTTPD_CGI } } #endif - + if (prequest != request_GET) { + sendHeaders(HTTP_NOT_IMPLEMENTED); + break; + } +#endif /* FEATURE_HTTPD_CGI */ + if (purl[-1] == '/') + strcpy(purl, "index.html"); + if (stat(test, &sb) == 0) { + /* It's a dir URL and there is index.html */ + config->ContentLength = sb.st_size; + config->last_mod = sb.st_mtime; + } +#if ENABLE_FEATURE_HTTPD_CGI + else if (purl[-1] == '/') { + /* It's a dir URL and there is no index.html + * Try cgi-bin/index.cgi */ + if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) { + purl[0] = '\0'; + config->query = url; + sendCgi("/cgi-bin/index.cgi", prequest, length, cookie, content_type); + break; + } + } +#endif /* FEATURE_HTTPD_CGI */ + sendFile(test); + config->ContentLength = -1; } while (0); +#if ENABLE_FEATURE_HTTPD_CGI + bail_out: +#endif -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD -/* from inetd don`t looping: freeing, closing automatic from exit always */ -# if DEBUG - fprintf(stderr, "closing socket\n"); -# endif -# ifdef CONFIG_FEATURE_HTTPD_CGI + if (DEBUG) + fprintf(stderr, "closing socket\n\n"); +#if ENABLE_FEATURE_HTTPD_CGI free(cookie); free(content_type); free(config->referer); -#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH + config->referer = NULL; +# if ENABLE_FEATURE_HTTPD_BASIC_AUTH free(config->remoteuser); -#endif + config->remoteuser = NULL; # endif -#endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */ - shutdown(a_c_w, SHUT_WR); +#endif + shutdown(config->accepted_socket, SHUT_WR); /* Properly wait for remote to closed */ - FD_ZERO (&s_fd) ; - FD_SET (a_c_r, &s_fd) ; + FD_ZERO(&s_fd); + FD_SET(config->accepted_socket, &s_fd); do { - tv.tv_sec = 2 ; - tv.tv_usec = 0 ; - retval = select (a_c_r + 1, &s_fd, NULL, NULL, &tv); - } while (retval > 0 && (read (a_c_r, buf, sizeof (config->buf)) > 0)); + tv.tv_sec = 2; + tv.tv_usec = 0; + retval = select(config->accepted_socket + 1, &s_fd, NULL, NULL, &tv); + } while (retval > 0 && read(config->accepted_socket, buf, sizeof(config->buf) > 0)); - shutdown(a_c_r, SHUT_RD); -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD + shutdown(config->accepted_socket, SHUT_RD); + /* In inetd case, we close fd 1 (stdout) here. We will exit soon anyway */ close(config->accepted_socket); -#endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */ } /**************************************************************************** @@ -1771,7 +1805,6 @@ FORBIDDEN: /* protect listing /cgi-bin */ * $Return: (int) . . . . Always 0. * ****************************************************************************/ -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD static int miniHttpd(int server) { fd_set readfd, portfd; @@ -1781,85 +1814,94 @@ static int miniHttpd(int server) /* copy the ports we are watching to the readfd set */ while (1) { - readfd = portfd; + int s; + union { + struct sockaddr sa; + struct sockaddr_in sin; + USE_FEATURE_IPV6(struct sockaddr_in6 sin6;) + } fromAddr; + socklen_t fromAddrLen = sizeof(fromAddr); /* Now wait INDEFINITELY on the set of sockets! */ - if (select(server + 1, &readfd, 0, 0, 0) > 0) { - if (FD_ISSET(server, &readfd)) { - int on; - struct sockaddr_in fromAddr; - - socklen_t fromAddrLen = sizeof(fromAddr); - int s = accept(server, - (struct sockaddr *)&fromAddr, &fromAddrLen); - - if (s < 0) { - continue; - } - config->accepted_socket = s; - config->rmt_ip = ntohl(fromAddr.sin_addr.s_addr); -#if defined(CONFIG_FEATURE_HTTPD_CGI) || DEBUG - sprintf(config->rmt_ip_str, "%u.%u.%u.%u", - (unsigned char)(config->rmt_ip >> 24), - (unsigned char)(config->rmt_ip >> 16), - (unsigned char)(config->rmt_ip >> 8), - config->rmt_ip & 0xff); - config->port = ntohs(fromAddr.sin_port); + readfd = portfd; + if (select(server + 1, &readfd, 0, 0, 0) <= 0) + continue; + if (!FD_ISSET(server, &readfd)) + continue; + s = accept(server, &fromAddr.sa, &fromAddrLen); + if (s < 0) + continue; + config->accepted_socket = s; + config->rmt_ip = 0; + config->port = 0; +#if ENABLE_FEATURE_HTTPD_CGI || DEBUG + free(config->rmt_ip_str); + config->rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen); #if DEBUG - bb_error_msg("connection from IP=%s, port %u", - config->rmt_ip_str, config->port); + bb_error_msg("connection from '%s'", config->rmt_ip_str); +#endif +#endif /* FEATURE_HTTPD_CGI */ + if (fromAddr.sa.sa_family == AF_INET) { + config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr); + config->port = ntohs(fromAddr.sin.sin_port); + } +#if ENABLE_FEATURE_IPV6 + if (fromAddr.sa.sa_family == AF_INET6) { + //config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr); + config->port = ntohs(fromAddr.sin6.sin6_port); + } #endif -#endif /* CONFIG_FEATURE_HTTPD_CGI */ - /* set the KEEPALIVE option to cull dead connections */ - on = 1; - setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on)); + /* set the KEEPALIVE option to cull dead connections */ + setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1)); -#if !DEBUG - if (fork() == 0) -#endif - { - /* This is the spawned thread */ -#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP - /* protect reload config, may be confuse checking */ - signal(SIGHUP, SIG_IGN); -#endif - handleIncoming(); -#if !DEBUG - exit(0); + if (DEBUG || fork() == 0) { + /* child */ +#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP + /* protect reload config, may be confuse checking */ + signal(SIGHUP, SIG_IGN); #endif - } - close(s); - } + handleIncoming(); + if (!DEBUG) + exit(0); } - } // while (1) + close(s); + } /* while (1) */ return 0; } -#else - /* from inetd */ - -static int miniHttpd(void) +/* from inetd */ +static int miniHttpd_inetd(void) { - struct sockaddr_in fromAddrLen; - socklen_t sinlen = sizeof (struct sockaddr_in); - - getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen); - config->rmt_ip = ntohl(fromAddrLen.sin_addr.s_addr); -#ifdef CONFIG_FEATURE_HTTPD_CGI - sprintf(config->rmt_ip_str, "%u.%u.%u.%u", - (unsigned char)(config->rmt_ip >> 24), - (unsigned char)(config->rmt_ip >> 16), - (unsigned char)(config->rmt_ip >> 8), - config->rmt_ip & 0xff); + union { + struct sockaddr sa; + struct sockaddr_in sin; + USE_FEATURE_IPV6(struct sockaddr_in6 sin6;) + } fromAddr; + socklen_t fromAddrLen = sizeof(fromAddr); + + getpeername(0, &fromAddr.sa, &fromAddrLen); + config->rmt_ip = 0; + config->port = 0; +#if ENABLE_FEATURE_HTTPD_CGI || DEBUG + free(config->rmt_ip_str); + config->rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen); +#endif + if (fromAddr.sa.sa_family == AF_INET) { + config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr); + config->port = ntohs(fromAddr.sin.sin_port); + } +#if ENABLE_FEATURE_IPV6 + if (fromAddr.sa.sa_family == AF_INET6) { + //config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr); + config->port = ntohs(fromAddr.sin6.sin6_port); + } #endif - config->port = ntohs(fromAddrLen.sin_port); handleIncoming(); return 0; } -#endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */ -#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP +#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP static void sighup_handler(int sig) { /* set and reset */ @@ -1873,147 +1915,135 @@ static void sighup_handler(int sig) } #endif -enum httpd_opts_nums { +enum { c_opt_config_file = 0, d_opt_decode_url, h_opt_home_httpd, USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,) - USE_FEATURE_HTTPD_BASIC_AUTH(r_opt_realm,) - USE_FEATURE_HTTPD_AUTH_MD5(m_opt_md5,) - USE_FEATURE_HTTPD_SETUID(u_opt_setuid,) - USE_FEATURE_HTTPD_WITHOUT_INETD(p_opt_port,) + USE_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,) + USE_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,) + USE_FEATURE_HTTPD_SETUID( u_opt_setuid ,) + p_opt_port , + p_opt_inetd , + p_opt_foreground, + OPT_CONFIG_FILE = 1 << c_opt_config_file, + OPT_DECODE_URL = 1 << d_opt_decode_url, + OPT_HOME_HTTPD = 1 << h_opt_home_httpd, + OPT_ENCODE_URL = USE_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0, + OPT_REALM = USE_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0, + OPT_MD5 = USE_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0, + OPT_SETUID = USE_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0, + OPT_PORT = 1 << p_opt_port, + OPT_INETD = 1 << p_opt_inetd, + OPT_FOREGROUND = 1 << p_opt_foreground, }; -static const char httpd_opts[]="c:d:h:" +static const char httpd_opts[] = "c:d:h:" USE_FEATURE_HTTPD_ENCODE_URL_STR("e:") USE_FEATURE_HTTPD_BASIC_AUTH("r:") USE_FEATURE_HTTPD_AUTH_MD5("m:") USE_FEATURE_HTTPD_SETUID("u:") - USE_FEATURE_HTTPD_WITHOUT_INETD("p:"); - -#define OPT_CONFIG_FILE (1<realm = "Web Server Authentication"; #endif - -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD config->port = 80; -#endif - config->ContentLength = -1; - opt = bb_getopt_ulflags(argc, argv, httpd_opts, + opt = getopt32(argc, argv, httpd_opts, &(config->configFile), &url_for_decode, &home_httpd USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode) USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm)) USE_FEATURE_HTTPD_AUTH_MD5(, &pass) - USE_FEATURE_HTTPD_SETUID(, &s_uid) - USE_FEATURE_HTTPD_WITHOUT_INETD(, &s_port) + USE_FEATURE_HTTPD_SETUID(, &s_ugid) + , &s_port ); - if (opt & OPT_DECODE_URL) { printf("%s", decodeString(url_for_decode, 1)); return 0; } -#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR +#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR if (opt & OPT_ENCODE_URL) { printf("%s", encodeString(url_for_encode)); return 0; } #endif -#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5 +#if ENABLE_FEATURE_HTTPD_AUTH_MD5 if (opt & OPT_MD5) { - printf("%s\n", pw_encrypt(pass, "$1$")); + puts(pw_encrypt(pass, "$1$")); return 0; } #endif -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD if (opt & OPT_PORT) - config->port = bb_xgetlarg(s_port, 10, 1, 0xffff); -#ifdef CONFIG_FEATURE_HTTPD_SETUID - if (opt & OPT_SETUID) { - char *e; + config->port = xatou16(s_port); - uid = strtol(s_uid, &e, 0); - if (*e != '\0') { - /* not integer */ - uid = bb_xgetpwnam(s_uid); - } +#if ENABLE_FEATURE_HTTPD_SETUID + if (opt & OPT_SETUID) { + if (!get_uidgid(&ugid, s_ugid, 1)) + bb_error_msg_and_die("unrecognized user[:group] " + "name '%s'", s_ugid); } -#endif #endif xchdir(home_httpd); -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD - server = openServer(); -# ifdef CONFIG_FEATURE_HTTPD_SETUID - /* drop privileges */ - if (uid > 0) - xsetuid(uid); -# endif + if (!(opt & OPT_INETD)) { + signal(SIGCHLD, SIG_IGN); + config->server_socket = openServer(); +#if ENABLE_FEATURE_HTTPD_SETUID + /* drop privileges */ + if (opt & OPT_SETUID) { + if (ugid.gid != (gid_t)-1) { + if (setgroups(1, &ugid.gid) == -1) + bb_perror_msg_and_die("setgroups"); + xsetgid(ugid.gid); + } + xsetuid(ugid.uid); + } #endif + } -#ifdef CONFIG_FEATURE_HTTPD_CGI +#if ENABLE_FEATURE_HTTPD_CGI { char *p = getenv("PATH"); - if (p) { - p = xstrdup(p); - } + p = xstrdup(p); /* if gets NULL, returns NULL */ clearenv(); if (p) - setenv("PATH", p, 1); -# ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD - addEnvPort("SERVER"); -# endif + setenv1("PATH", p); + if (!(opt & OPT_INETD)) + setenv_long("SERVER_PORT", config->port); } #endif -#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP +#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP sighup_handler(0); #else parse_conf(default_path_httpd_conf, FIRST_PARSE); #endif -#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD -# if !DEBUG - xdaemon(1, 0); /* don`t change curent directory */ -# endif - return miniHttpd(server); -#else - return miniHttpd(); -#endif + if (opt & OPT_INETD) + return miniHttpd_inetd(); + + if (!(opt & OPT_FOREGROUND)) + xdaemon(1, 0); /* don't change current directory */ + return miniHttpd(config->server_socket); }