[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/networking/httpd.c b/ap/app/busybox/src/networking/httpd.c
new file mode 100644
index 0000000..1934bb2
--- /dev/null
+++ b/ap/app/busybox/src/networking/httpd.c
@@ -0,0 +1,2571 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * httpd implementation for busybox
+ *
+ * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
+ * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ *
+ *****************************************************************************
+ *
+ * Typical usage:
+ * For non root user:
+ * httpd -p 8080 -h $HOME/public_html
+ * For daemon start from rc script with uid=0:
+ * httpd -u www
+ * which is equivalent to (assuming user www has uid 80):
+ * httpd -p 80 -u 80 -h $PWD -c /etc/httpd.conf -r "Web Server Authentication"
+ *
+ * When an url starts with "/cgi-bin/" it is assumed to be a cgi script.
+ * The server changes directory to the location of the script and executes it
+ * after setting QUERY_STRING and other environment variables.
+ *
+ * If directory URL is given, no index.html is found and CGI support is enabled,
+ * cgi-bin/index.cgi will be run. Directory to list is ../$QUERY_STRING.
+ * See httpd_indexcgi.c for an example GCI code.
+ *
+ * Doc:
+ * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
+ *
+ * The applet can also be invoked as an url arg decoder and html text encoder
+ * as follows:
+ * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
+ * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
+ * Note that url encoding for arguments is not the same as html encoding for
+ * presentation. -d decodes an url-encoded argument while -e encodes in html
+ * for page display.
+ *
+ * httpd.conf has the following format:
+ *
+ * H:/serverroot # define the server root. It will override -h
+ * A:172.20. # Allow address from 172.20.0.0/16
+ * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
+ * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
+ * A:127.0.0.1 # Allow local loopback connections
+ * D:* # Deny from other IP connections
+ * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
+ * I:index.html # Show index.html when a directory is requested
+ *
+ * P:/url:[http://]hostname[:port]/new/path
+ * # When /urlXXXXXX is requested, reverse proxy
+ * # it to http://hostname[:port]/new/pathXXXXXX
+ *
+ * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
+ * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
+ * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
+ * /adm:root:* # or user root, pwd from /etc/passwd on urls starting with /adm/
+ * /wiki:*:* # or any user from /etc/passwd with according pwd on urls starting with /wiki/
+ * .au:audio/basic # additional mime type for audio.au files
+ * *.php:/path/php # run xxx.php through an interpreter
+ *
+ * A/D may be as a/d or allow/deny - only first char matters.
+ * Deny/Allow IP logic:
+ * - Default is to allow all (Allow all (A:*) is a no-op).
+ * - Deny rules take precedence over allow rules.
+ * - "Deny all" rule (D:*) is applied last.
+ *
+ * Example:
+ * 1. Allow only specified addresses
+ * A:172.20 # Allow any address that begins with 172.20.
+ * A:10.10. # Allow any address that begins with 10.10.
+ * A:127.0.0.1 # Allow local loopback connections
+ * D:* # Deny from other IP connections
+ *
+ * 2. Only deny specified addresses
+ * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
+ * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
+ * A:* # (optional line added for clarity)
+ *
+ * If a sub directory contains config file, it is parsed and merged with
+ * any existing settings as if it was appended to the original configuration.
+ *
+ * subdir paths are relative to the containing subdir and thus cannot
+ * affect the parent rules.
+ *
+ * Note that since the sub dir is parsed in the forked thread servicing the
+ * subdir http request, any merge is discarded when the process exits. As a
+ * result, the subdir settings only have a lifetime of a single request.
+ *
+ * Custom error pages can contain an absolute path or be relative to
+ * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
+ * page can only be defined in the root configuration file and are not taken
+ * into account in local (directories) config files.
+ *
+ * If -c is not set, an attempt will be made to open the default
+ * root configuration file. If -c is set and the file is not found, the
+ * server exits with an error.
+ *
+ */
+ /* TODO: use TCP_CORK, parse_config() */
+
+//usage:#define httpd_trivial_usage
+//usage: "[-ifv[v]]"
+//usage: " [-c CONFFILE]"
+//usage: " [-p [IP:]PORT]"
+//usage: IF_FEATURE_HTTPD_SETUID(" [-u USER[:GRP]]")
+//usage: IF_FEATURE_HTTPD_BASIC_AUTH(" [-r REALM]")
+//usage: " [-h HOME]\n"
+//usage: "or httpd -d/-e" IF_FEATURE_HTTPD_AUTH_MD5("/-m") " STRING"
+//usage:#define httpd_full_usage "\n\n"
+//usage: "Listen for incoming HTTP requests\n"
+//usage: "\n -i Inetd mode"
+//usage: "\n -f Don't daemonize"
+//usage: "\n -v[v] Verbose"
+//usage: "\n -p [IP:]PORT Bind to IP:PORT (default *:80)"
+//usage: IF_FEATURE_HTTPD_SETUID(
+//usage: "\n -u USER[:GRP] Set uid/gid after binding to port")
+//usage: IF_FEATURE_HTTPD_BASIC_AUTH(
+//usage: "\n -r REALM Authentication Realm for Basic Authentication")
+//usage: "\n -h HOME Home directory (default .)"
+//usage: "\n -c FILE Configuration file (default {/etc,HOME}/httpd.conf)"
+//usage: IF_FEATURE_HTTPD_AUTH_MD5(
+//usage: "\n -m STRING MD5 crypt STRING")
+//usage: "\n -e STRING HTML encode STRING"
+//usage: "\n -d STRING URL decode STRING"
+
+#include "libbb.h"
+#if ENABLE_PAM
+/* PAM may include <locale.h>. We may need to undefine bbox's stub define: */
+# undef setlocale
+/* For some obscure reason, PAM is not in pam/xxx, but in security/xxx.
+ * Apparently they like to confuse people. */
+# include <security/pam_appl.h>
+# include <security/pam_misc.h>
+#endif
+#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
+# include <sys/sendfile.h>
+#endif
+/* amount of buffering in a pipe */
+#ifndef PIPE_BUF
+# define PIPE_BUF 4096
+#endif
+
+#define DEBUG 0
+
+#define IOBUF_SIZE 8192
+#if PIPE_BUF >= IOBUF_SIZE
+# error "PIPE_BUF >= IOBUF_SIZE"
+#endif
+
+#define HEADER_READ_TIMEOUT 60
+
+static const char DEFAULT_PATH_HTTPD_CONF[] ALIGN1 = "/etc";
+static const char HTTPD_CONF[] ALIGN1 = "httpd.conf";
+static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
+static const char index_html[] ALIGN1 = "index.html";
+
+typedef struct has_next_ptr {
+ struct has_next_ptr *next;
+} has_next_ptr;
+
+/* Must have "next" as a first member */
+typedef struct Htaccess {
+ struct Htaccess *next;
+ char *after_colon;
+ char before_colon[1]; /* really bigger, must be last */
+} Htaccess;
+
+/* Must have "next" as a first member */
+typedef struct Htaccess_IP {
+ struct Htaccess_IP *next;
+ unsigned ip;
+ unsigned mask;
+ int allow_deny;
+} Htaccess_IP;
+
+/* Must have "next" as a first member */
+typedef struct Htaccess_Proxy {
+ struct Htaccess_Proxy *next;
+ char *url_from;
+ char *host_port;
+ char *url_to;
+} Htaccess_Proxy;
+
+enum {
+ HTTP_OK = 200,
+ HTTP_PARTIAL_CONTENT = 206,
+ HTTP_MOVED_TEMPORARILY = 302,
+ HTTP_BAD_REQUEST = 400, /* malformed syntax */
+ HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
+ HTTP_NOT_FOUND = 404,
+ HTTP_FORBIDDEN = 403,
+ HTTP_REQUEST_TIMEOUT = 408,
+ HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
+ HTTP_INTERNAL_SERVER_ERROR = 500,
+ HTTP_CONTINUE = 100,
+#if 0 /* future use */
+ HTTP_SWITCHING_PROTOCOLS = 101,
+ HTTP_CREATED = 201,
+ HTTP_ACCEPTED = 202,
+ HTTP_NON_AUTHORITATIVE_INFO = 203,
+ HTTP_NO_CONTENT = 204,
+ HTTP_MULTIPLE_CHOICES = 300,
+ HTTP_MOVED_PERMANENTLY = 301,
+ HTTP_NOT_MODIFIED = 304,
+ HTTP_PAYMENT_REQUIRED = 402,
+ HTTP_BAD_GATEWAY = 502,
+ HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
+#endif
+};
+
+static const uint16_t http_response_type[] ALIGN2 = {
+ HTTP_OK,
+#if ENABLE_FEATURE_HTTPD_RANGES
+ HTTP_PARTIAL_CONTENT,
+#endif
+ HTTP_MOVED_TEMPORARILY,
+ HTTP_REQUEST_TIMEOUT,
+ HTTP_NOT_IMPLEMENTED,
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ HTTP_UNAUTHORIZED,
+#endif
+ HTTP_NOT_FOUND,
+ HTTP_BAD_REQUEST,
+ HTTP_FORBIDDEN,
+ HTTP_INTERNAL_SERVER_ERROR,
+#if 0 /* not implemented */
+ HTTP_CREATED,
+ HTTP_ACCEPTED,
+ HTTP_NO_CONTENT,
+ HTTP_MULTIPLE_CHOICES,
+ HTTP_MOVED_PERMANENTLY,
+ HTTP_NOT_MODIFIED,
+ HTTP_BAD_GATEWAY,
+ HTTP_SERVICE_UNAVAILABLE,
+#endif
+};
+
+static const struct {
+ const char *name;
+ const char *info;
+} http_response[ARRAY_SIZE(http_response_type)] = {
+ { "OK", NULL },
+#if ENABLE_FEATURE_HTTPD_RANGES
+ { "Partial Content", NULL },
+#endif
+ { "Found", NULL },
+ { "Request Timeout", "No request appeared within 60 seconds" },
+ { "Not Implemented", "The requested method is not recognized" },
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ { "Unauthorized", "" },
+#endif
+ { "Not Found", "The requested URL was not found" },
+ { "Bad Request", "Unsupported method" },
+ { "Forbidden", "" },
+ { "Internal Server Error", "Internal Server Error" },
+#if 0 /* not implemented */
+ { "Created" },
+ { "Accepted" },
+ { "No Content" },
+ { "Multiple Choices" },
+ { "Moved Permanently" },
+ { "Not Modified" },
+ { "Bad Gateway", "" },
+ { "Service Unavailable", "" },
+#endif
+};
+
+struct globals {
+ int verbose; /* must be int (used by getopt32) */
+ smallint flg_deny_all;
+
+ unsigned rmt_ip; /* used for IP-based allow/deny rules */
+ time_t last_mod;
+ char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
+ const char *bind_addr_or_port;
+
+ const char *g_query;
+ const char *opt_c_configFile;
+ const char *home_httpd;
+ const char *index_page;
+
+ const char *found_mime_type;
+ const char *found_moved_temporarily;
+ Htaccess_IP *ip_a_d; /* config allow/deny lines */
+
+ IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
+ IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
+ IF_FEATURE_HTTPD_CGI(char *referer;)
+ IF_FEATURE_HTTPD_CGI(char *user_agent;)
+ IF_FEATURE_HTTPD_CGI(char *host;)
+ IF_FEATURE_HTTPD_CGI(char *http_accept;)
+ IF_FEATURE_HTTPD_CGI(char *http_accept_language;)
+
+ off_t file_size; /* -1 - unknown */
+#if ENABLE_FEATURE_HTTPD_RANGES
+ off_t range_start;
+ off_t range_end;
+ off_t range_len;
+#endif
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ Htaccess *g_auth; /* config user:password lines */
+#endif
+ Htaccess *mime_a; /* config mime types */
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ Htaccess *script_i; /* config script interpreters */
+#endif
+ char *iobuf; /* [IOBUF_SIZE] */
+#define hdr_buf bb_common_bufsiz1
+ char *hdr_ptr;
+ int hdr_cnt;
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ const char *http_error_page[ARRAY_SIZE(http_response_type)];
+#endif
+#if ENABLE_FEATURE_HTTPD_PROXY
+ Htaccess_Proxy *proxy;
+#endif
+#if ENABLE_FEATURE_HTTPD_GZIP
+ /* client can handle gzip / we are going to send gzip */
+ smallint content_gzip;
+#endif
+};
+#define G (*ptr_to_globals)
+#define verbose (G.verbose )
+#define flg_deny_all (G.flg_deny_all )
+#define rmt_ip (G.rmt_ip )
+#define bind_addr_or_port (G.bind_addr_or_port)
+#define g_query (G.g_query )
+#define opt_c_configFile (G.opt_c_configFile )
+#define home_httpd (G.home_httpd )
+#define index_page (G.index_page )
+#define found_mime_type (G.found_mime_type )
+#define found_moved_temporarily (G.found_moved_temporarily)
+#define last_mod (G.last_mod )
+#define ip_a_d (G.ip_a_d )
+#define g_realm (G.g_realm )
+#define remoteuser (G.remoteuser )
+#define referer (G.referer )
+#define user_agent (G.user_agent )
+#define host (G.host )
+#define http_accept (G.http_accept )
+#define http_accept_language (G.http_accept_language)
+#define file_size (G.file_size )
+#if ENABLE_FEATURE_HTTPD_RANGES
+#define range_start (G.range_start )
+#define range_end (G.range_end )
+#define range_len (G.range_len )
+#else
+enum {
+ range_start = -1,
+ range_end = MAXINT(off_t) - 1,
+ range_len = MAXINT(off_t),
+};
+#endif
+#define rmt_ip_str (G.rmt_ip_str )
+#define g_auth (G.g_auth )
+#define mime_a (G.mime_a )
+#define script_i (G.script_i )
+#define iobuf (G.iobuf )
+#define hdr_ptr (G.hdr_ptr )
+#define hdr_cnt (G.hdr_cnt )
+#define http_error_page (G.http_error_page )
+#define proxy (G.proxy )
+#if ENABLE_FEATURE_HTTPD_GZIP
+# define content_gzip (G.content_gzip )
+#else
+# define content_gzip 0
+#endif
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+ IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
+ IF_FEATURE_HTTPD_RANGES(range_start = -1;) \
+ bind_addr_or_port = "80"; \
+ index_page = index_html; \
+ file_size = -1; \
+} while (0)
+
+
+#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
+
+/* Prototypes */
+enum {
+ SEND_HEADERS = (1 << 0),
+ SEND_BODY = (1 << 1),
+ SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
+};
+static void send_file_and_exit(const char *url, int what) NORETURN;
+
+static void free_llist(has_next_ptr **pptr)
+{
+ has_next_ptr *cur = *pptr;
+ while (cur) {
+ has_next_ptr *t = cur;
+ cur = cur->next;
+ free(t);
+ }
+ *pptr = NULL;
+}
+
+static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
+{
+ free_llist((has_next_ptr**)pptr);
+}
+
+static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
+{
+ free_llist((has_next_ptr**)pptr);
+}
+
+/* Returns presumed mask width in bits or < 0 on error.
+ * Updates strp, stores IP at provided pointer */
+static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
+{
+ const char *p = *strp;
+ int auto_mask = 8;
+ unsigned ip = 0;
+ int j;
+
+ if (*p == '/')
+ return -auto_mask;
+
+ for (j = 0; j < 4; j++) {
+ unsigned octet;
+
+ if ((*p < '0' || *p > '9') && *p != '/' && *p)
+ return -auto_mask;
+ octet = 0;
+ while (*p >= '0' && *p <= '9') {
+ octet *= 10;
+ octet += *p - '0';
+ if (octet > 255)
+ return -auto_mask;
+ p++;
+ }
+ if (*p == '.')
+ p++;
+ if (*p != '/' && *p)
+ auto_mask += 8;
+ ip = (ip << 8) | octet;
+ }
+ if (*p) {
+ if (*p != endc)
+ return -auto_mask;
+ p++;
+ if (*p == '\0')
+ return -auto_mask;
+ }
+ *ipp = ip;
+ *strp = p;
+ return auto_mask;
+}
+
+/* Returns 0 on success. Stores IP and mask at provided pointers */
+static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
+{
+ int i;
+ unsigned mask;
+ char *p;
+
+ i = scan_ip(&str, ipp, '/');
+ if (i < 0)
+ return i;
+
+ if (*str) {
+ /* there is /xxx after dotted-IP address */
+ i = bb_strtou(str, &p, 10);
+ if (*p == '.') {
+ /* 'xxx' itself is dotted-IP mask, parse it */
+ /* (return 0 (success) only if it has N.N.N.N form) */
+ return scan_ip(&str, maskp, '\0') - 32;
+ }
+ if (*p)
+ return -1;
+ }
+
+ if (i > 32)
+ return -1;
+
+ if (sizeof(unsigned) == 4 && i == 32) {
+ /* mask >>= 32 below may not work */
+ mask = 0;
+ } else {
+ mask = 0xffffffff;
+ mask >>= i;
+ }
+ /* i == 0 -> *maskp = 0x00000000
+ * i == 1 -> *maskp = 0x80000000
+ * i == 4 -> *maskp = 0xf0000000
+ * i == 31 -> *maskp = 0xfffffffe
+ * i == 32 -> *maskp = 0xffffffff */
+ *maskp = (uint32_t)(~mask);
+ return 0;
+}
+
+/*
+ * Parse configuration file into in-memory linked list.
+ *
+ * Any previous IP rules are discarded.
+ * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
+ * are also discarded. That is, previous settings are retained if flag is
+ * SUBDIR_PARSE.
+ * Error pages are only parsed on the main config file.
+ *
+ * path Path where to look for httpd.conf (without filename).
+ * flag Type of the parse request.
+ */
+/* flag param: */
+enum {
+ FIRST_PARSE = 0, /* path will be "/etc" */
+ SIGNALED_PARSE = 1, /* path will be "/etc" */
+ SUBDIR_PARSE = 2, /* path will be derived from URL */
+};
+static void parse_conf(const char *path, int flag)
+{
+ /* internally used extra flag state */
+ enum { TRY_CURDIR_PARSE = 3 };
+
+ FILE *f;
+ const char *filename;
+ char buf[160];
+
+ /* discard old rules */
+ free_Htaccess_IP_list(&ip_a_d);
+ flg_deny_all = 0;
+ /* retain previous auth and mime config only for subdir parse */
+ if (flag != SUBDIR_PARSE) {
+ free_Htaccess_list(&mime_a);
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ free_Htaccess_list(&g_auth);
+#endif
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ free_Htaccess_list(&script_i);
+#endif
+ }
+
+ filename = opt_c_configFile;
+ if (flag == SUBDIR_PARSE || filename == NULL) {
+ filename = alloca(strlen(path) + sizeof(HTTPD_CONF) + 2);
+ sprintf((char *)filename, "%s/%s", path, HTTPD_CONF);
+ }
+
+ while ((f = fopen_for_read(filename)) == NULL) {
+ if (flag >= SUBDIR_PARSE) { /* SUBDIR or TRY_CURDIR */
+ /* config file not found, no changes to config */
+ return;
+ }
+ if (flag == FIRST_PARSE) {
+ /* -c CONFFILE given, but CONFFILE doesn't exist? */
+ if (opt_c_configFile)
+ bb_simple_perror_msg_and_die(opt_c_configFile);
+ /* else: no -c, thus we looked at /etc/httpd.conf,
+ * and it's not there. try ./httpd.conf: */
+ }
+ flag = TRY_CURDIR_PARSE;
+ filename = HTTPD_CONF;
+ }
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ /* in "/file:user:pass" lines, we prepend path in subdirs */
+ if (flag != SUBDIR_PARSE)
+ path = "";
+#endif
+ /* The lines can be:
+ *
+ * I:default_index_file
+ * H:http_home
+ * [AD]:IP[/mask] # allow/deny, * for wildcard
+ * Ennn:error.html # error page for status nnn
+ * P:/url:[http://]hostname[:port]/new/path # reverse proxy
+ * .ext:mime/type # mime type
+ * *.php:/path/php # run xxx.php through an interpreter
+ * /file:user:pass # username and password
+ */
+ while (fgets(buf, sizeof(buf), f) != NULL) {
+ unsigned strlen_buf;
+ unsigned char ch;
+ char *after_colon;
+
+ { /* remove all whitespace, and # comments */
+ char *p, *p0;
+
+ p0 = buf;
+ /* skip non-whitespace beginning. Often the whole line
+ * is non-whitespace. We want this case to work fast,
+ * without needless copying, therefore we don't merge
+ * this operation into next while loop. */
+ while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
+ && ch != ' ' && ch != '\t'
+ ) {
+ p0++;
+ }
+ p = p0;
+ /* if we enter this loop, we have some whitespace.
+ * discard it */
+ while (ch != '\0' && ch != '\n' && ch != '#') {
+ if (ch != ' ' && ch != '\t') {
+ *p++ = ch;
+ }
+ ch = *++p0;
+ }
+ *p = '\0';
+ strlen_buf = p - buf;
+ if (strlen_buf == 0)
+ continue; /* empty line */
+ }
+
+ after_colon = strchr(buf, ':');
+ /* strange line? */
+ if (after_colon == NULL || *++after_colon == '\0')
+ goto config_error;
+
+ ch = (buf[0] & ~0x20); /* toupper if it's a letter */
+
+ if (ch == 'I') {
+ if (index_page != index_html)
+ free((char*)index_page);
+ index_page = xstrdup(after_colon);
+ continue;
+ }
+
+ /* do not allow jumping around using H in subdir's configs */
+ if (flag == FIRST_PARSE && ch == 'H') {
+ home_httpd = xstrdup(after_colon);
+ xchdir(home_httpd);
+ continue;
+ }
+
+ if (ch == 'A' || ch == 'D') {
+ Htaccess_IP *pip;
+
+ if (*after_colon == '*') {
+ if (ch == 'D') {
+ /* memorize "deny all" */
+ flg_deny_all = 1;
+ }
+ /* skip assumed "A:*", it is a default anyway */
+ continue;
+ }
+ /* store "allow/deny IP/mask" line */
+ pip = xzalloc(sizeof(*pip));
+ if (scan_ip_mask(after_colon, &pip->ip, &pip->mask)) {
+ /* IP{/mask} syntax error detected, protect all */
+ ch = 'D';
+ pip->mask = 0;
+ }
+ pip->allow_deny = ch;
+ if (ch == 'D') {
+ /* Deny:from_IP - prepend */
+ pip->next = ip_a_d;
+ ip_a_d = pip;
+ } else {
+ /* A:from_IP - append (thus all D's precedes A's) */
+ Htaccess_IP *prev_IP = ip_a_d;
+ if (prev_IP == NULL) {
+ ip_a_d = pip;
+ } else {
+ while (prev_IP->next)
+ prev_IP = prev_IP->next;
+ prev_IP->next = pip;
+ }
+ }
+ continue;
+ }
+
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ if (flag == FIRST_PARSE && ch == 'E') {
+ unsigned i;
+ int status = atoi(buf + 1); /* error status code */
+
+ if (status < HTTP_CONTINUE) {
+ goto config_error;
+ }
+ /* then error page; find matching status */
+ for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
+ if (http_response_type[i] == status) {
+ /* We chdir to home_httpd, thus no need to
+ * concat_path_file(home_httpd, after_colon)
+ * here */
+ http_error_page[i] = xstrdup(after_colon);
+ break;
+ }
+ }
+ continue;
+ }
+#endif
+
+#if ENABLE_FEATURE_HTTPD_PROXY
+ if (flag == FIRST_PARSE && ch == 'P') {
+ /* P:/url:[http://]hostname[:port]/new/path */
+ char *url_from, *host_port, *url_to;
+ Htaccess_Proxy *proxy_entry;
+
+ url_from = after_colon;
+ host_port = strchr(after_colon, ':');
+ if (host_port == NULL) {
+ goto config_error;
+ }
+ *host_port++ = '\0';
+ if (strncmp(host_port, "http://", 7) == 0)
+ host_port += 7;
+ if (*host_port == '\0') {
+ goto config_error;
+ }
+ url_to = strchr(host_port, '/');
+ if (url_to == NULL) {
+ goto config_error;
+ }
+ *url_to = '\0';
+ proxy_entry = xzalloc(sizeof(*proxy_entry));
+ proxy_entry->url_from = xstrdup(url_from);
+ proxy_entry->host_port = xstrdup(host_port);
+ *url_to = '/';
+ proxy_entry->url_to = xstrdup(url_to);
+ proxy_entry->next = proxy;
+ proxy = proxy_entry;
+ continue;
+ }
+#endif
+ /* the rest of directives are non-alphabetic,
+ * must avoid using "toupper'ed" ch */
+ ch = buf[0];
+
+ if (ch == '.' /* ".ext:mime/type" */
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
+#endif
+ ) {
+ char *p;
+ Htaccess *cur;
+
+ cur = xzalloc(sizeof(*cur) /* includes space for NUL */ + strlen_buf);
+ strcpy(cur->before_colon, buf);
+ p = cur->before_colon + (after_colon - buf);
+ p[-1] = '\0';
+ cur->after_colon = p;
+ if (ch == '.') {
+ /* .mime line: prepend to mime_a list */
+ cur->next = mime_a;
+ mime_a = cur;
+ }
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ else {
+ /* script interpreter line: prepend to script_i list */
+ cur->next = script_i;
+ script_i = cur;
+ }
+#endif
+ continue;
+ }
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (ch == '/') { /* "/file:user:pass" */
+ char *p;
+ Htaccess *cur;
+ unsigned file_len;
+
+ /* note: path is "" unless we are in SUBDIR parse,
+ * otherwise it does NOT start with "/" */
+ cur = xzalloc(sizeof(*cur) /* includes space for NUL */
+ + 1 + strlen(path)
+ + strlen_buf
+ );
+ /* form "/path/file" */
+ sprintf(cur->before_colon, "/%s%.*s",
+ path,
+ (int) (after_colon - buf - 1), /* includes "/", but not ":" */
+ buf);
+ /* canonicalize it */
+ p = bb_simplify_abs_path_inplace(cur->before_colon);
+ file_len = p - cur->before_colon;
+ /* add "user:pass" after NUL */
+ strcpy(++p, after_colon);
+ cur->after_colon = p;
+
+ /* insert cur into g_auth */
+ /* g_auth is sorted by decreased filename length */
+ {
+ Htaccess *auth, **authp;
+
+ authp = &g_auth;
+ while ((auth = *authp) != NULL) {
+ if (file_len >= strlen(auth->before_colon)) {
+ /* insert cur before auth */
+ cur->next = auth;
+ break;
+ }
+ authp = &auth->next;
+ }
+ *authp = cur;
+ }
+ continue;
+ }
+#endif /* BASIC_AUTH */
+
+ /* the line is not recognized */
+ config_error:
+ bb_error_msg("config error '%s' in '%s'", buf, filename);
+ } /* while (fgets) */
+
+ fclose(f);
+}
+
+#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
+/*
+ * Given a string, html-encode special characters.
+ * This is used for the -e command line option to provide an easy way
+ * for scripts to encode result data without confusing browsers. The
+ * returned string pointer is memory allocated by malloc().
+ *
+ * Returns a pointer to the encoded string (malloced).
+ */
+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 = xmalloc(len * 6 + 1);
+ char *p = out;
+ char ch;
+
+ while ((ch = *string++) != '\0') {
+ /* very simple check for what to encode */
+ if (isalnum(ch))
+ *p++ = ch;
+ else
+ p += sprintf(p, "&#%d;", (unsigned char) ch);
+ }
+ *p = '\0';
+ return out;
+}
+#endif
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+/*
+ * Decode a base64 data stream as per rfc1521.
+ * Note that the rfc states that non base64 chars are to be ignored.
+ * Since the decode always results in a shorter size than the input,
+ * it is OK to pass the input arg as an output arg.
+ * Parameter: a pointer to a base64 encoded string.
+ * Decoded data is stored in-place.
+ */
+static void decodeBase64(char *Data)
+{
+ const unsigned char *in = (const unsigned char *)Data;
+ /* The decoded size will be at most 3/4 the size of the encoded */
+ unsigned ch = 0;
+ int i = 0;
+
+ while (*in) {
+ int t = *in++;
+
+ if (t >= '0' && t <= '9')
+ t = t - '0' + 52;
+ else if (t >= 'A' && t <= 'Z')
+ t = t - 'A';
+ else if (t >= 'a' && t <= 'z')
+ t = t - 'a' + 26;
+ else if (t == '+')
+ t = 62;
+ else if (t == '/')
+ t = 63;
+ else if (t == '=')
+ t = 0;
+ else
+ continue;
+
+ ch = (ch << 6) | t;
+ i++;
+ if (i == 4) {
+ *Data++ = (char) (ch >> 16);
+ *Data++ = (char) (ch >> 8);
+ *Data++ = (char) ch;
+ i = 0;
+ }
+ }
+ *Data = '\0';
+}
+#endif
+
+/*
+ * Create a listen server socket on the designated port.
+ */
+static int openServer(void)
+{
+ unsigned n = bb_strtou(bind_addr_or_port, NULL, 10);
+ if (!errno && n && n <= 0xffff)
+ n = create_and_bind_stream_or_die(NULL, n);
+ else
+ n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
+ xlisten(n, 9);
+ return n;
+}
+
+/*
+ * Log the connection closure and exit.
+ */
+static void log_and_exit(void) NORETURN;
+static void log_and_exit(void)
+{
+ /* Paranoia. IE said to be buggy. It may send some extra data
+ * or be confused by us just exiting without SHUT_WR. Oh well. */
+ shutdown(1, SHUT_WR);
+ /* Why??
+ (this also messes up stdin when user runs httpd -i from terminal)
+ ndelay_on(0);
+ while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
+ continue;
+ */
+
+ if (verbose > 2)
+ bb_error_msg("closed");
+ _exit(xfunc_error_retval);
+}
+
+/*
+ * Create and send HTTP response headers.
+ * The arguments are combined and sent as one write operation. Note that
+ * IE will puke big-time if the headers are not sent in one packet and the
+ * second packet is delayed for any reason.
+ * responseNum - the result code to send.
+ */
+static void send_headers(int responseNum)
+{
+ static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
+
+ const char *responseString = "";
+ const char *infoString = NULL;
+ const char *mime_type;
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ const char *error_page = NULL;
+#endif
+ unsigned i;
+ time_t timer = time(NULL);
+ char tmp_str[80];
+ int len;
+
+ for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
+ if (http_response_type[i] == responseNum) {
+ responseString = http_response[i].name;
+ infoString = http_response[i].info;
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ error_page = http_error_page[i];
+#endif
+ break;
+ }
+ }
+ /* error message is HTML */
+ mime_type = responseNum == HTTP_OK ?
+ found_mime_type : "text/html";
+
+ if (verbose)
+ bb_error_msg("response:%u", responseNum);
+
+ /* emit the current date */
+ strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
+ len = sprintf(iobuf,
+ "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
+ "Date: %s\r\nConnection: close\r\n",
+ responseNum, responseString, mime_type, tmp_str);
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (responseNum == HTTP_UNAUTHORIZED) {
+ len += sprintf(iobuf + len,
+ "WWW-Authenticate: Basic realm=\"%s\"\r\n",
+ g_realm);
+ }
+#endif
+ if (responseNum == HTTP_MOVED_TEMPORARILY) {
+ len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
+ found_moved_temporarily,
+ (g_query ? "?" : ""),
+ (g_query ? g_query : ""));
+ }
+
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ if (error_page && access(error_page, R_OK) == 0) {
+ strcat(iobuf, "\r\n");
+ len += 2;
+
+ if (DEBUG)
+ fprintf(stderr, "headers: '%s'\n", iobuf);
+ full_write(STDOUT_FILENO, iobuf, len);
+ if (DEBUG)
+ fprintf(stderr, "writing error page: '%s'\n", error_page);
+ return send_file_and_exit(error_page, SEND_BODY);
+ }
+#endif
+
+ if (file_size != -1) { /* file */
+ strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
+#if ENABLE_FEATURE_HTTPD_RANGES
+ if (responseNum == HTTP_PARTIAL_CONTENT) {
+ len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
+ range_start,
+ range_end,
+ file_size);
+ file_size = range_end - range_start + 1;
+ }
+#endif
+ len += sprintf(iobuf + len,
+#if ENABLE_FEATURE_HTTPD_RANGES
+ "Accept-Ranges: bytes\r\n"
+#endif
+ "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
+ tmp_str,
+ content_gzip ? "Transfer-length:" : "Content-length:",
+ file_size
+ );
+ }
+
+ if (content_gzip)
+ len += sprintf(iobuf + len, "Content-Encoding: gzip\r\n");
+
+ iobuf[len++] = '\r';
+ iobuf[len++] = '\n';
+ if (infoString) {
+ len += sprintf(iobuf + len,
+ "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
+ "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
+ responseNum, responseString,
+ responseNum, responseString, infoString);
+ }
+ if (DEBUG)
+ fprintf(stderr, "headers: '%s'\n", iobuf);
+ if (full_write(STDOUT_FILENO, iobuf, len) != len) {
+ if (verbose > 1)
+ bb_perror_msg("error");
+ log_and_exit();
+ }
+}
+
+static void send_headers_and_exit(int responseNum) NORETURN;
+static void send_headers_and_exit(int responseNum)
+{
+ IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
+ send_headers(responseNum);
+ log_and_exit();
+}
+
+/*
+ * Read from the socket until '\n' or EOF. '\r' chars are removed.
+ * '\n' is replaced with NUL.
+ * Return number of characters read or 0 if nothing is read
+ * ('\r' and '\n' are not counted).
+ * Data is returned in iobuf.
+ */
+static int get_line(void)
+{
+ int count = 0;
+ char c;
+
+ alarm(HEADER_READ_TIMEOUT);
+ while (1) {
+ if (hdr_cnt <= 0) {
+ hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
+ if (hdr_cnt <= 0)
+ break;
+ hdr_ptr = hdr_buf;
+ }
+ iobuf[count] = c = *hdr_ptr++;
+ hdr_cnt--;
+
+ if (c == '\r')
+ continue;
+ if (c == '\n') {
+ iobuf[count] = '\0';
+ break;
+ }
+ if (count < (IOBUF_SIZE - 1)) /* check overflow */
+ count++;
+ }
+ return count;
+}
+
+#if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
+
+/* gcc 4.2.1 fares better with NOINLINE */
+static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) NORETURN;
+static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
+{
+ enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
+ struct pollfd pfd[3];
+ int out_cnt; /* we buffer a bit of initial CGI output */
+ int count;
+
+ /* iobuf is used for CGI -> network data,
+ * hdr_buf is for network -> CGI data (POSTDATA) */
+
+ /* If CGI dies, we still want to correctly finish reading its output
+ * and send it to the peer. So please no SIGPIPEs! */
+ signal(SIGPIPE, SIG_IGN);
+
+ // We inconsistently handle a case when more POSTDATA from network
+ // is coming than we expected. We may give *some part* of that
+ // extra data to CGI.
+
+ //if (hdr_cnt > post_len) {
+ // /* We got more POSTDATA from network than we expected */
+ // hdr_cnt = post_len;
+ //}
+ post_len -= hdr_cnt;
+ /* post_len - number of POST bytes not yet read from network */
+
+ /* NB: breaking out of this loop jumps to log_and_exit() */
+ out_cnt = 0;
+ while (1) {
+ memset(pfd, 0, sizeof(pfd));
+
+ pfd[FROM_CGI].fd = fromCgi_rd;
+ pfd[FROM_CGI].events = POLLIN;
+
+ if (toCgi_wr) {
+ pfd[TO_CGI].fd = toCgi_wr;
+ if (hdr_cnt > 0) {
+ pfd[TO_CGI].events = POLLOUT;
+ } else if (post_len > 0) {
+ pfd[0].events = POLLIN;
+ } else {
+ /* post_len <= 0 && hdr_cnt <= 0:
+ * no more POST data to CGI,
+ * let CGI see EOF on CGI's stdin */
+ if (toCgi_wr != fromCgi_rd)
+ close(toCgi_wr);
+ toCgi_wr = 0;
+ }
+ }
+
+ /* Now wait on the set of sockets */
+ count = safe_poll(pfd, toCgi_wr ? TO_CGI+1 : FROM_CGI+1, -1);
+ if (count <= 0) {
+#if 0
+ if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
+ /* Weird. CGI didn't exit and no fd's
+ * are ready, yet poll returned?! */
+ continue;
+ }
+ if (DEBUG && WIFEXITED(status))
+ bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
+ if (DEBUG && WIFSIGNALED(status))
+ bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
+#endif
+ break;
+ }
+
+ if (pfd[TO_CGI].revents) {
+ /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
+ /* Have data from peer and can write to CGI */
+ count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
+ /* Doesn't happen, we dont use nonblocking IO here
+ *if (count < 0 && errno == EAGAIN) {
+ * ...
+ *} else */
+ if (count > 0) {
+ hdr_ptr += count;
+ hdr_cnt -= count;
+ } else {
+ /* EOF/broken pipe to CGI, stop piping POST data */
+ hdr_cnt = post_len = 0;
+ }
+ }
+
+ if (pfd[0].revents) {
+ /* post_len > 0 && hdr_cnt == 0 here */
+ /* We expect data, prev data portion is eaten by CGI
+ * and there *is* data to read from the peer
+ * (POSTDATA) */
+ //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
+ //count = safe_read(STDIN_FILENO, hdr_buf, count);
+ count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
+ if (count > 0) {
+ hdr_cnt = count;
+ hdr_ptr = hdr_buf;
+ post_len -= count;
+ } else {
+ /* no more POST data can be read */
+ post_len = 0;
+ }
+ }
+
+ if (pfd[FROM_CGI].revents) {
+ /* There is something to read from CGI */
+ char *rbuf = iobuf;
+
+ /* Are we still buffering CGI output? */
+ if (out_cnt >= 0) {
+ /* HTTP_200[] has single "\r\n" at the end.
+ * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
+ * CGI scripts MUST send their own header terminated by
+ * empty line, then data. That's why we have only one
+ * <cr><lf> pair here. We will output "200 OK" line
+ * if needed, but CGI still has to provide blank line
+ * between header and body */
+
+ /* 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(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
+ if (count <= 0) {
+ /* eof (or error) and there was no "HTTP",
+ * so write it, then write received data */
+ if (out_cnt) {
+ full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
+ full_write(STDOUT_FILENO, rbuf, out_cnt);
+ }
+ break; /* CGI stdout is closed, exiting */
+ }
+ out_cnt += count;
+ count = 0;
+ /* "Status" header format is: "Status: 302 Redirected\r\n" */
+ if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
+ /* send "HTTP/1.0 " */
+ if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
+ break;
+ rbuf += 8; /* skip "Status: " */
+ count = out_cnt - 8;
+ out_cnt = -1; /* buffering off */
+ } else if (out_cnt >= 4) {
+ /* Did CGI add "HTTP"? */
+ if (memcmp(rbuf, HTTP_200, 4) != 0) {
+ /* there is no "HTTP", do it ourself */
+ if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
+ break;
+ }
+ /* Commented out:
+ if (!strstr(rbuf, "ontent-")) {
+ full_write(s, "Content-type: text/plain\r\n\r\n", 28);
+ }
+ * Counter-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"
+ */
+ count = out_cnt;
+ out_cnt = -1; /* buffering off */
+ }
+ } else {
+ count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
+ if (count <= 0)
+ break; /* eof (or error) */
+ }
+ if (full_write(STDOUT_FILENO, rbuf, count) != count)
+ break;
+ if (DEBUG)
+ fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
+ } /* if (pfd[FROM_CGI].revents) */
+ } /* while (1) */
+ log_and_exit();
+}
+#endif
+
+#if ENABLE_FEATURE_HTTPD_CGI
+
+static void setenv1(const char *name, const char *value)
+{
+ setenv(name, value ? value : "", 1);
+}
+
+/*
+ * Spawn CGI script, forward CGI's stdin/out <=> network
+ *
+ * Environment variables are set up and the script is invoked with pipes
+ * for stdin/stdout. If a POST is being done the script is fed the POST
+ * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
+ *
+ * Parameters:
+ * const char *url The requested URL (with leading /).
+ * const char *orig_uri The original URI before rewriting (if any)
+ * int post_len Length of the POST body.
+ * const char *cookie For set HTTP_COOKIE.
+ * const char *content_type For set CONTENT_TYPE.
+ */
+static void send_cgi_and_exit(
+ const char *url,
+ const char *orig_uri,
+ const char *request,
+ int post_len,
+ const char *cookie,
+ const char *content_type) NORETURN;
+static void send_cgi_and_exit(
+ const char *url,
+ const char *orig_uri,
+ const char *request,
+ int post_len,
+ const char *cookie,
+ const char *content_type)
+{
+ struct fd_pair fromCgi; /* CGI -> httpd pipe */
+ struct fd_pair toCgi; /* httpd -> CGI pipe */
+ char *script, *last_slash;
+ int pid;
+
+ /* Make a copy. NB: caller guarantees:
+ * url[0] == '/', url[1] != '/' */
+ url = xstrdup(url);
+
+ /*
+ * We are mucking with environment _first_ and then vfork/exec,
+ * this allows us to use vfork safely. Parent doesn't care about
+ * these environment changes anyway.
+ */
+
+ /* Check for [dirs/]script.cgi/PATH_INFO */
+ last_slash = script = (char*)url;
+ while ((script = strchr(script + 1, '/')) != NULL) {
+ int dir;
+ *script = '\0';
+ dir = is_directory(url + 1, /*followlinks:*/ 1);
+ *script = '/';
+ if (!dir) {
+ /* not directory, found script.cgi/PATH_INFO */
+ break;
+ }
+ /* is directory, find next '/' */
+ last_slash = script;
+ }
+ setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
+ setenv1("REQUEST_METHOD", request);
+ if (g_query) {
+ putenv(xasprintf("%s=%s?%s", "REQUEST_URI", orig_uri, g_query));
+ } else {
+ setenv1("REQUEST_URI", orig_uri);
+ }
+ if (script != NULL)
+ *script = '\0'; /* cut off /PATH_INFO */
+
+ /* SCRIPT_FILENAME is required by PHP in CGI mode */
+ if (home_httpd[0] == '/') {
+ char *fullpath = concat_path_file(home_httpd, url);
+ setenv1("SCRIPT_FILENAME", fullpath);
+ }
+ /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
+ setenv1("SCRIPT_NAME", url);
+ /* 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", g_query);
+ putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
+ 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 = rmt_ip_str ? 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 (cp) {
+ *cp = ':';
+#if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+ setenv1("REMOTE_PORT", cp + 1);
+#endif
+ }
+ }
+ setenv1("HTTP_USER_AGENT", user_agent);
+ if (http_accept)
+ setenv1("HTTP_ACCEPT", http_accept);
+ if (http_accept_language)
+ setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language);
+ if (post_len)
+ putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
+ if (cookie)
+ setenv1("HTTP_COOKIE", cookie);
+ if (content_type)
+ setenv1("CONTENT_TYPE", content_type);
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (remoteuser) {
+ setenv1("REMOTE_USER", remoteuser);
+ putenv((char*)"AUTH_TYPE=Basic");
+ }
+#endif
+ if (referer)
+ setenv1("HTTP_REFERER", referer);
+ setenv1("HTTP_HOST", host); /* set to "" if NULL */
+ /* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
+ * just run "env SERVER_NAME=xyz httpd ..." instead */
+
+ xpiped_pair(fromCgi);
+ xpiped_pair(toCgi);
+
+ pid = vfork();
+ if (pid < 0) {
+ /* TODO: log perror? */
+ log_and_exit();
+ }
+
+ if (pid == 0) {
+ /* Child process */
+ char *argv[3];
+
+ xfunc_error_retval = 242;
+
+ /* NB: close _first_, then move fds! */
+ close(toCgi.wr);
+ close(fromCgi.rd);
+ xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
+ xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
+ /* User seeing stderr output can be a security problem.
+ * If CGI really wants that, it can always do dup itself. */
+ /* dup2(1, 2); */
+
+ /* Chdiring to script's dir */
+ script = last_slash;
+ if (script != url) { /* paranoia */
+ *script = '\0';
+ if (chdir(url + 1) != 0) {
+ bb_perror_msg("can't change directory to '%s'", url + 1);
+ goto error_execing_cgi;
+ }
+ // not needed: *script = '/';
+ }
+ script++;
+
+ /* set argv[0] to name without path */
+ argv[0] = script;
+ argv[1] = NULL;
+
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ {
+ char *suffix = strrchr(script, '.');
+
+ if (suffix) {
+ Htaccess *cur;
+ for (cur = script_i; cur; cur = cur->next) {
+ if (strcmp(cur->before_colon + 1, suffix) == 0) {
+ /* found interpreter name */
+ argv[0] = cur->after_colon;
+ argv[1] = script;
+ argv[2] = NULL;
+ break;
+ }
+ }
+ }
+ }
+#endif
+ /* restore default signal dispositions for CGI process */
+ bb_signals(0
+ | (1 << SIGCHLD)
+ | (1 << SIGPIPE)
+ | (1 << SIGHUP)
+ , SIG_DFL);
+
+ /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
+ * without any dir components and will only match a file
+ * in the current directory */
+ execv(argv[0], argv);
+ if (verbose)
+ bb_perror_msg("can't execute '%s'", argv[0]);
+ error_execing_cgi:
+ /* send to stdout
+ * (we are CGI here, our stdout is pumped to the net) */
+ send_headers_and_exit(HTTP_NOT_FOUND);
+ } /* end child */
+
+ /* Parent process */
+
+ /* Restore variables possibly changed by child */
+ xfunc_error_retval = 0;
+
+ /* Pump data */
+ close(fromCgi.wr);
+ close(toCgi.rd);
+ cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
+}
+
+#endif /* FEATURE_HTTPD_CGI */
+
+/*
+ * Send a file response to a HTTP request, and exit
+ *
+ * Parameters:
+ * const char *url The requested URL (with leading /).
+ * what What to send (headers/body/both).
+ */
+static NOINLINE void send_file_and_exit(const char *url, int what)
+{
+ char *suffix;
+ int fd;
+ ssize_t count;
+
+ if (content_gzip) {
+ /* does <url>.gz exist? Then use it instead */
+ char *gzurl = xasprintf("%s.gz", url);
+ fd = open(gzurl, O_RDONLY);
+ free(gzurl);
+ if (fd != -1) {
+ struct stat sb;
+ fstat(fd, &sb);
+ file_size = sb.st_size;
+ last_mod = sb.st_mtime;
+ } else {
+ IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
+ fd = open(url, O_RDONLY);
+ }
+ } else {
+ fd = open(url, O_RDONLY);
+ }
+ if (fd < 0) {
+ if (DEBUG)
+ bb_perror_msg("can't open '%s'", url);
+ /* Error pages are sent by using send_file_and_exit(SEND_BODY).
+ * IOW: it is unsafe to call send_headers_and_exit
+ * if what is SEND_BODY! Can recurse! */
+ if (what != SEND_BODY)
+ send_headers_and_exit(HTTP_NOT_FOUND);
+ log_and_exit();
+ }
+ /* If you want to know about EPIPE below
+ * (happens if you abort downloads from local httpd): */
+ signal(SIGPIPE, SIG_IGN);
+
+ /* If not found, default is "application/octet-stream" */
+ found_mime_type = "application/octet-stream";
+ suffix = strrchr(url, '.');
+ if (suffix) {
+ static const char suffixTable[] ALIGN1 =
+ /* Shorter suffix must be first:
+ * ".html.htm" will fail for ".htm"
+ */
+ ".txt.h.c.cc.cpp\0" "text/plain\0"
+ /* .htm line must be after .h line */
+ ".htm.html\0" "text/html\0"
+ ".jpg.jpeg\0" "image/jpeg\0"
+ ".gif\0" "image/gif\0"
+ ".png\0" "image/png\0"
+ /* .css line must be after .c line */
+ ".css\0" "text/css\0"
+ ".wav\0" "audio/wav\0"
+ ".avi\0" "video/x-msvideo\0"
+ ".qt.mov\0" "video/quicktime\0"
+ ".mpe.mpeg\0" "video/mpeg\0"
+ ".mid.midi\0" "audio/midi\0"
+ ".mp3\0" "audio/mpeg\0"
+#if 0 /* unpopular */
+ ".au\0" "audio/basic\0"
+ ".pac\0" "application/x-ns-proxy-autoconfig\0"
+ ".vrml.wrl\0" "model/vrml\0"
+#endif
+ /* compiler adds another "\0" here */
+ ;
+ Htaccess *cur;
+
+ /* Examine built-in table */
+ const char *table = suffixTable;
+ const char *table_next;
+ for (; *table; table = table_next) {
+ const char *try_suffix;
+ const char *mime_type;
+ mime_type = table + strlen(table) + 1;
+ table_next = mime_type + strlen(mime_type) + 1;
+ try_suffix = strstr(table, suffix);
+ if (!try_suffix)
+ continue;
+ try_suffix += strlen(suffix);
+ if (*try_suffix == '\0' || *try_suffix == '.') {
+ found_mime_type = mime_type;
+ break;
+ }
+ /* Example: strstr(table, ".av") != NULL, but it
+ * does not match ".avi" after all and we end up here.
+ * The table is arranged so that in this case we know
+ * that it can't match anything in the following lines,
+ * and we stop the search: */
+ break;
+ }
+ /* ...then user's table */
+ for (cur = mime_a; cur; cur = cur->next) {
+ if (strcmp(cur->before_colon, suffix) == 0) {
+ found_mime_type = cur->after_colon;
+ break;
+ }
+ }
+ }
+
+ if (DEBUG)
+ bb_error_msg("sending file '%s' content-type: %s",
+ url, found_mime_type);
+
+#if ENABLE_FEATURE_HTTPD_RANGES
+ if (what == SEND_BODY /* err pages and ranges don't mix */
+ || content_gzip /* we are sending compressed page: can't do ranges */ ///why?
+ ) {
+ range_start = -1;
+ }
+ range_len = MAXINT(off_t);
+ if (range_start >= 0) {
+ if (!range_end || range_end > file_size - 1) {
+ range_end = file_size - 1;
+ }
+ if (range_end < range_start
+ || lseek(fd, range_start, SEEK_SET) != range_start
+ ) {
+ lseek(fd, 0, SEEK_SET);
+ range_start = -1;
+ } else {
+ range_len = range_end - range_start + 1;
+ send_headers(HTTP_PARTIAL_CONTENT);
+ what = SEND_BODY;
+ }
+ }
+#endif
+ if (what & SEND_HEADERS)
+ send_headers(HTTP_OK);
+#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
+ {
+ off_t offset = range_start;
+ while (1) {
+ /* sz is rounded down to 64k */
+ ssize_t sz = MAXINT(ssize_t) - 0xffff;
+ IF_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
+ count = sendfile(STDOUT_FILENO, fd, &offset, sz);
+ if (count < 0) {
+ if (offset == range_start)
+ break; /* fall back to read/write loop */
+ goto fin;
+ }
+ IF_FEATURE_HTTPD_RANGES(range_len -= count;)
+ if (count == 0 || range_len == 0)
+ log_and_exit();
+ }
+ }
+#endif
+ while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
+ ssize_t n;
+ IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
+ n = full_write(STDOUT_FILENO, iobuf, count);
+ if (count != n)
+ break;
+ IF_FEATURE_HTTPD_RANGES(range_len -= count;)
+ if (range_len == 0)
+ break;
+ }
+ if (count < 0) {
+ IF_FEATURE_HTTPD_USE_SENDFILE(fin:)
+ if (verbose > 1)
+ bb_perror_msg("error");
+ }
+ log_and_exit();
+}
+
+static int checkPermIP(void)
+{
+ Htaccess_IP *cur;
+
+ for (cur = ip_a_d; cur; cur = cur->next) {
+#if DEBUG
+ fprintf(stderr,
+ "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
+ rmt_ip_str,
+ (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 ((rmt_ip & cur->mask) == cur->ip)
+ return (cur->allow_deny == 'A'); /* A -> 1 */
+ }
+
+ return !flg_deny_all; /* depends on whether we saw "D:*" */
+}
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+
+# if ENABLE_PAM
+struct pam_userinfo {
+ const char *name;
+ const char *pw;
+};
+
+static int pam_talker(int num_msg,
+ const struct pam_message **msg,
+ struct pam_response **resp,
+ void *appdata_ptr)
+{
+ int i;
+ struct pam_userinfo *userinfo = (struct pam_userinfo *) appdata_ptr;
+ struct pam_response *response;
+
+ if (!resp || !msg || !userinfo)
+ return PAM_CONV_ERR;
+
+ /* allocate memory to store response */
+ response = xzalloc(num_msg * sizeof(*response));
+
+ /* copy values */
+ for (i = 0; i < num_msg; i++) {
+ const char *s;
+
+ switch (msg[i]->msg_style) {
+ case PAM_PROMPT_ECHO_ON:
+ s = userinfo->name;
+ break;
+ case PAM_PROMPT_ECHO_OFF:
+ s = userinfo->pw;
+ break;
+ case PAM_ERROR_MSG:
+ case PAM_TEXT_INFO:
+ s = "";
+ break;
+ default:
+ free(response);
+ return PAM_CONV_ERR;
+ }
+ response[i].resp = xstrdup(s);
+ if (PAM_SUCCESS != 0)
+ response[i].resp_retcode = PAM_SUCCESS;
+ }
+ *resp = response;
+ return PAM_SUCCESS;
+}
+# endif
+
+/*
+ * Config file entries are of the form "/<path>:<user>:<passwd>".
+ * If config file has no prefix match for path, access is allowed.
+ *
+ * path The file path
+ * user_and_passwd "user:passwd" to validate
+ *
+ * Returns 1 if user_and_passwd is OK.
+ */
+static int check_user_passwd(const char *path, char *user_and_passwd)
+{
+ Htaccess *cur;
+ const char *prev = NULL;
+
+ for (cur = g_auth; cur; cur = cur->next) {
+ const char *dir_prefix;
+ size_t len;
+ int r;
+
+ dir_prefix = cur->before_colon;
+
+ /* WHY? */
+ /* If already saw a match, don't accept other different matches */
+ if (prev && strcmp(prev, dir_prefix) != 0)
+ continue;
+
+ if (DEBUG)
+ fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);
+
+ /* If it's not a prefix match, continue searching */
+ len = strlen(dir_prefix);
+ if (len != 1 /* dir_prefix "/" matches all, don't need to check */
+ && (strncmp(dir_prefix, path, len) != 0
+ || (path[len] != '/' && path[len] != '\0')
+ )
+ ) {
+ continue;
+ }
+
+ /* Path match found */
+ prev = dir_prefix;
+
+ if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
+ char *colon_after_user;
+ const char *passwd;
+# if ENABLE_FEATURE_SHADOWPASSWDS && !ENABLE_PAM
+ char sp_buf[256];
+# endif
+
+ colon_after_user = strchr(user_and_passwd, ':');
+ if (!colon_after_user)
+ goto bad_input;
+
+ /* compare "user:" */
+ if (cur->after_colon[0] != '*'
+ && strncmp(cur->after_colon, user_and_passwd,
+ colon_after_user - user_and_passwd + 1) != 0
+ ) {
+ continue;
+ }
+ /* this cfg entry is '*' or matches username from peer */
+
+ passwd = strchr(cur->after_colon, ':');
+ if (!passwd)
+ goto bad_input;
+ passwd++;
+ if (passwd[0] == '*') {
+# if ENABLE_PAM
+ struct pam_userinfo userinfo;
+ struct pam_conv conv_info = { &pam_talker, (void *) &userinfo };
+ pam_handle_t *pamh;
+
+ *colon_after_user = '\0';
+ userinfo.name = user_and_passwd;
+ userinfo.pw = colon_after_user + 1;
+ r = pam_start("httpd", user_and_passwd, &conv_info, &pamh) != PAM_SUCCESS;
+ if (r == 0) {
+ r = pam_authenticate(pamh, PAM_DISALLOW_NULL_AUTHTOK) != PAM_SUCCESS
+ || pam_acct_mgmt(pamh, PAM_DISALLOW_NULL_AUTHTOK) != PAM_SUCCESS
+ ;
+ pam_end(pamh, PAM_SUCCESS);
+ }
+ *colon_after_user = ':';
+ goto end_check_passwd;
+# else
+# if ENABLE_FEATURE_SHADOWPASSWDS
+ /* Using _r function to avoid pulling in static buffers */
+ struct spwd spw;
+# endif
+ struct passwd *pw;
+
+ *colon_after_user = '\0';
+ pw = getpwnam(user_and_passwd);
+ *colon_after_user = ':';
+ if (!pw || !pw->pw_passwd)
+ continue;
+ passwd = pw->pw_passwd;
+# if ENABLE_FEATURE_SHADOWPASSWDS
+ if ((passwd[0] == 'x' || passwd[0] == '*') && !passwd[1]) {
+ /* getspnam_r may return 0 yet set result to NULL.
+ * At least glibc 2.4 does this. Be extra paranoid here. */
+ struct spwd *result = NULL;
+ r = getspnam_r(pw->pw_name, &spw, sp_buf, sizeof(sp_buf), &result);
+ if (r == 0 && result)
+ passwd = result->sp_pwdp;
+ }
+# endif
+ /* In this case, passwd is ALWAYS encrypted:
+ * it came from /etc/passwd or /etc/shadow!
+ */
+ goto check_encrypted;
+# endif /* ENABLE_PAM */
+ }
+ /* Else: passwd is from httpd.conf, it is either plaintext or encrypted */
+
+ if (passwd[0] == '$' && isdigit(passwd[1])) {
+ char *encrypted;
+# if !ENABLE_PAM
+ check_encrypted:
+# endif
+ /* encrypt pwd from peer and check match with local one */
+ encrypted = pw_encrypt(
+ /* pwd (from peer): */ colon_after_user + 1,
+ /* salt: */ passwd,
+ /* cleanup: */ 0
+ );
+ r = strcmp(encrypted, passwd);
+ free(encrypted);
+ } else {
+ /* local passwd is from httpd.conf and it's plaintext */
+ r = strcmp(colon_after_user + 1, passwd);
+ }
+ goto end_check_passwd;
+ }
+ bad_input:
+ /* Comparing plaintext "user:pass" in one go */
+ r = strcmp(cur->after_colon, user_and_passwd);
+ end_check_passwd:
+ if (r == 0) {
+ remoteuser = xstrndup(user_and_passwd,
+ strchrnul(user_and_passwd, ':') - user_and_passwd
+ );
+ return 1; /* Ok */
+ }
+ } /* for */
+
+ /* 0(bad) if prev is set: matches were found but passwd was wrong */
+ return (prev == NULL);
+}
+#endif /* FEATURE_HTTPD_BASIC_AUTH */
+
+#if ENABLE_FEATURE_HTTPD_PROXY
+static Htaccess_Proxy *find_proxy_entry(const char *url)
+{
+ Htaccess_Proxy *p;
+ for (p = proxy; p; p = p->next) {
+ if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
+ return p;
+ }
+ return NULL;
+}
+#endif
+
+/*
+ * Handle timeouts
+ */
+static void send_REQUEST_TIMEOUT_and_exit(int sig) NORETURN;
+static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM)
+{
+ send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
+}
+
+/*
+ * Handle an incoming http request and exit.
+ */
+static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) NORETURN;
+static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
+{
+ static const char request_GET[] ALIGN1 = "GET";
+ struct stat sb;
+ char *urlcopy;
+ char *urlp;
+ char *tptr;
+#if ENABLE_FEATURE_HTTPD_CGI
+ static const char request_HEAD[] ALIGN1 = "HEAD";
+ const char *prequest;
+ char *cookie = NULL;
+ char *content_type = NULL;
+ unsigned long length = 0;
+#elif ENABLE_FEATURE_HTTPD_PROXY
+#define prequest request_GET
+ unsigned long length = 0;
+#endif
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ smallint authorized = -1;
+#endif
+ smallint ip_allowed;
+ char http_major_version;
+#if ENABLE_FEATURE_HTTPD_PROXY
+ char http_minor_version;
+ char *header_buf = header_buf; /* for gcc */
+ char *header_ptr = header_ptr;
+ Htaccess_Proxy *proxy_entry;
+#endif
+
+ /* Allocation of iobuf is postponed until now
+ * (IOW, server process doesn't need to waste 8k) */
+ iobuf = xmalloc(IOBUF_SIZE);
+
+ rmt_ip = 0;
+ if (fromAddr->u.sa.sa_family == AF_INET) {
+ rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
+ }
+#if ENABLE_FEATURE_IPV6
+ if (fromAddr->u.sa.sa_family == AF_INET6
+ && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
+ && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
+ && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
+ rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
+#endif
+ if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
+ /* NB: can be NULL (user runs httpd -i by hand?) */
+ rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
+ }
+ if (verbose) {
+ /* this trick makes -v logging much simpler */
+ if (rmt_ip_str)
+ applet_name = rmt_ip_str;
+ if (verbose > 2)
+ bb_error_msg("connected");
+ }
+
+ /* Install timeout handler. get_line() needs it. */
+ signal(SIGALRM, send_REQUEST_TIMEOUT_and_exit);
+
+ if (!get_line()) /* EOF or error or empty line */
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+
+ /* Determine type of request (GET/POST) */
+ urlp = strpbrk(iobuf, " \t");
+ if (urlp == NULL)
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+ *urlp++ = '\0';
+#if ENABLE_FEATURE_HTTPD_CGI
+ prequest = request_GET;
+ if (strcasecmp(iobuf, prequest) != 0) {
+ prequest = request_HEAD;
+ if (strcasecmp(iobuf, prequest) != 0) {
+ prequest = "POST";
+ if (strcasecmp(iobuf, prequest) != 0)
+ send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
+ }
+ }
+#else
+ if (strcasecmp(iobuf, request_GET) != 0)
+ send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
+#endif
+ urlp = skip_whitespace(urlp);
+ if (urlp[0] != '/')
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+
+ /* Find end of URL and parse HTTP version, if any */
+ http_major_version = '0';
+ IF_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
+ tptr = strchrnul(urlp, ' ');
+ /* Is it " HTTP/"? */
+ if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
+ http_major_version = tptr[6];
+ IF_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
+ }
+ *tptr = '\0';
+
+ /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
+ urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
+ /*if (urlcopy == NULL)
+ * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
+ strcpy(urlcopy, urlp);
+ /* NB: urlcopy ptr is never changed after this */
+
+ /* Extract url args if present */
+ /* g_query = NULL; - already is */
+ tptr = strchr(urlcopy, '?');
+ if (tptr) {
+ *tptr++ = '\0';
+ g_query = tptr;
+ }
+
+ /* Decode URL escape sequences */
+ tptr = percent_decode_in_place(urlcopy, /*strict:*/ 1);
+ if (tptr == NULL)
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+ if (tptr == urlcopy + 1) {
+ /* '/' or NUL is encoded */
+ send_headers_and_exit(HTTP_NOT_FOUND);
+ }
+
+ /* Canonicalize path */
+ /* Algorithm stolen from libbb bb_simplify_path(),
+ * but don't strdup, retain trailing slash, protect root */
+ urlp = tptr = urlcopy;
+ for (;;) {
+ if (*urlp == '/') {
+ /* skip duplicate (or initial) slash */
+ if (*tptr == '/') {
+ goto next_char;
+ }
+ if (*tptr == '.') {
+ if (tptr[1] == '.' && (tptr[2] == '/' || tptr[2] == '\0')) {
+ /* "..": be careful */
+ /* protect root */
+ if (urlp == urlcopy)
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+ /* omit previous dir */
+ while (*--urlp != '/')
+ continue;
+ /* skip to "./" or ".<NUL>" */
+ tptr++;
+ }
+ if (tptr[1] == '/' || tptr[1] == '\0') {
+ /* skip extra "/./" */
+ goto next_char;
+ }
+ }
+ }
+ *++urlp = *tptr;
+ if (*urlp == '\0')
+ break;
+ next_char:
+ tptr++;
+ }
+
+ /* If URL is a directory, add '/' */
+ if (urlp[-1] != '/') {
+ if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
+ found_moved_temporarily = urlcopy;
+ }
+ }
+
+ /* Log it */
+ if (verbose > 1)
+ bb_error_msg("url:%s", urlcopy);
+
+ tptr = urlcopy;
+ ip_allowed = checkPermIP();
+ while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
+ /* have path1/path2 */
+ *tptr = '\0';
+ if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
+ /* may have subdir config */
+ parse_conf(urlcopy + 1, SUBDIR_PARSE);
+ ip_allowed = checkPermIP();
+ }
+ *tptr = '/';
+ }
+
+#if ENABLE_FEATURE_HTTPD_PROXY
+ proxy_entry = find_proxy_entry(urlcopy);
+ if (proxy_entry)
+ header_buf = header_ptr = xmalloc(IOBUF_SIZE);
+#endif
+
+ if (http_major_version >= '0') {
+ /* Request was with "... HTTP/nXXX", and n >= 0 */
+
+ /* Read until blank line */
+ while (1) {
+ if (!get_line())
+ break; /* EOF or error or empty line */
+ if (DEBUG)
+ bb_error_msg("header: '%s'", iobuf);
+
+#if ENABLE_FEATURE_HTTPD_PROXY
+ /* We need 2 more bytes for yet another "\r\n" -
+ * see near fdprintf(proxy_fd...) further below */
+ if (proxy_entry && (header_ptr - header_buf) < IOBUF_SIZE - 2) {
+ int len = strlen(iobuf);
+ if (len > IOBUF_SIZE - (header_ptr - header_buf) - 4)
+ len = IOBUF_SIZE - (header_ptr - header_buf) - 4;
+ memcpy(header_ptr, iobuf, len);
+ header_ptr += len;
+ header_ptr[0] = '\r';
+ header_ptr[1] = '\n';
+ header_ptr += 2;
+ }
+#endif
+
+#if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
+ /* Try and do our best to parse more lines */
+ if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
+ /* extra read only for POST */
+ if (prequest != request_GET
+# if ENABLE_FEATURE_HTTPD_CGI
+ && prequest != request_HEAD
+# endif
+ ) {
+ tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
+ if (!tptr[0])
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+ /* not using strtoul: it ignores leading minus! */
+ length = bb_strtou(tptr, NULL, 10);
+ /* length is "ulong", but we need to pass it to int later */
+ if (errno || length > INT_MAX)
+ send_headers_and_exit(HTTP_BAD_REQUEST);
+ }
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_CGI
+ else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
+ cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
+ } else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
+ content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
+ } else if (STRNCASECMP(iobuf, "Referer:") == 0) {
+ referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
+ } else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
+ user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
+ } else if (STRNCASECMP(iobuf, "Host:") == 0) {
+ host = xstrdup(skip_whitespace(iobuf + sizeof("Host:")-1));
+ } else if (STRNCASECMP(iobuf, "Accept:") == 0) {
+ http_accept = xstrdup(skip_whitespace(iobuf + sizeof("Accept:")-1));
+ } else if (STRNCASECMP(iobuf, "Accept-Language:") == 0) {
+ http_accept_language = xstrdup(skip_whitespace(iobuf + sizeof("Accept-Language:")-1));
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (STRNCASECMP(iobuf, "Authorization:") == 0) {
+ /* We only allow Basic credentials.
+ * It shows up as "Authorization: Basic <user>:<passwd>" where
+ * "<user>:<passwd>" is base64 encoded.
+ */
+ tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
+ if (STRNCASECMP(tptr, "Basic") != 0)
+ continue;
+ tptr += sizeof("Basic")-1;
+ /* decodeBase64() skips whitespace itself */
+ decodeBase64(tptr);
+ authorized = check_user_passwd(urlcopy, tptr);
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_RANGES
+ if (STRNCASECMP(iobuf, "Range:") == 0) {
+ /* We know only bytes=NNN-[MMM] */
+ char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
+ if (strncmp(s, "bytes=", 6) == 0) {
+ s += sizeof("bytes=")-1;
+ range_start = BB_STRTOOFF(s, &s, 10);
+ if (s[0] != '-' || range_start < 0) {
+ range_start = -1;
+ } else if (s[1]) {
+ range_end = BB_STRTOOFF(s+1, NULL, 10);
+ if (errno || range_end < range_start)
+ range_start = -1;
+ }
+ }
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_GZIP
+ if (STRNCASECMP(iobuf, "Accept-Encoding:") == 0) {
+ /* Note: we do not support "gzip;q=0"
+ * method of _disabling_ gzip
+ * delivery. No one uses that, though */
+ const char *s = strstr(iobuf, "gzip");
+ if (s) {
+ // want more thorough checks?
+ //if (s[-1] == ' '
+ // || s[-1] == ','
+ // || s[-1] == ':'
+ //) {
+ content_gzip = 1;
+ //}
+ }
+ }
+#endif
+ } /* while extra header reading */
+ }
+
+ /* We are done reading headers, disable peer timeout */
+ alarm(0);
+
+ if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
+ /* protect listing [/path]/httpd.conf or IP deny */
+ send_headers_and_exit(HTTP_FORBIDDEN);
+ }
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ /* Case: no "Authorization:" was seen, but page might require passwd.
+ * Check that with dummy user:pass */
+ if (authorized < 0)
+ authorized = check_user_passwd(urlcopy, (char *) "");
+ if (!authorized)
+ send_headers_and_exit(HTTP_UNAUTHORIZED);
+#endif
+
+ if (found_moved_temporarily) {
+ send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
+ }
+
+#if ENABLE_FEATURE_HTTPD_PROXY
+ if (proxy_entry != NULL) {
+ int proxy_fd;
+ len_and_sockaddr *lsa;
+
+ proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (proxy_fd < 0)
+ send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
+ lsa = host2sockaddr(proxy_entry->host_port, 80);
+ if (lsa == NULL)
+ send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
+ if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
+ send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
+ fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
+ prequest, /* GET or POST */
+ proxy_entry->url_to, /* url part 1 */
+ urlcopy + strlen(proxy_entry->url_from), /* url part 2 */
+ (g_query ? "?" : ""), /* "?" (maybe) */
+ (g_query ? g_query : ""), /* query string (maybe) */
+ http_major_version, http_minor_version);
+ header_ptr[0] = '\r';
+ header_ptr[1] = '\n';
+ header_ptr += 2;
+ write(proxy_fd, header_buf, header_ptr - header_buf);
+ free(header_buf); /* on the order of 8k, free it */
+ cgi_io_loop_and_exit(proxy_fd, proxy_fd, length);
+ }
+#endif
+
+ tptr = urlcopy + 1; /* skip first '/' */
+
+#if ENABLE_FEATURE_HTTPD_CGI
+ if (strncmp(tptr, "cgi-bin/", 8) == 0) {
+ if (tptr[8] == '\0') {
+ /* protect listing "cgi-bin/" */
+ send_headers_and_exit(HTTP_FORBIDDEN);
+ }
+ send_cgi_and_exit(urlcopy, urlcopy, prequest, length, cookie, content_type);
+ }
+#endif
+
+ if (urlp[-1] == '/') {
+ /* When index_page string is appended to <dir>/ URL, it overwrites
+ * the query string. If we fall back to call /cgi-bin/index.cgi,
+ * query string would be lost and not available to the CGI.
+ * Work around it by making a deep copy.
+ */
+ if (ENABLE_FEATURE_HTTPD_CGI)
+ g_query = xstrdup(g_query); /* ok for NULL too */
+ strcpy(urlp, index_page);
+ }
+ if (stat(tptr, &sb) == 0) {
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ char *suffix = strrchr(tptr, '.');
+ if (suffix) {
+ Htaccess *cur;
+ for (cur = script_i; cur; cur = cur->next) {
+ if (strcmp(cur->before_colon + 1, suffix) == 0) {
+ send_cgi_and_exit(urlcopy, urlcopy, prequest, length, cookie, content_type);
+ }
+ }
+ }
+#endif
+ file_size = sb.st_size;
+ last_mod = sb.st_mtime;
+ }
+#if ENABLE_FEATURE_HTTPD_CGI
+ else if (urlp[-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) {
+ urlp[0] = '\0'; /* remove index_page */
+ send_cgi_and_exit("/cgi-bin/index.cgi", urlcopy, prequest, length, cookie, content_type);
+ }
+ }
+ /* else fall through to send_file, it errors out if open fails: */
+
+ if (prequest != request_GET && prequest != request_HEAD) {
+ /* POST for files does not make sense */
+ send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
+ }
+ send_file_and_exit(tptr,
+ (prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
+ );
+#else
+ send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
+#endif
+}
+
+/*
+ * The main http server function.
+ * Given a socket, listen for new connections and farm out
+ * the processing as a [v]forked process.
+ * Never returns.
+ */
+#if BB_MMU
+static void mini_httpd(int server_socket) NORETURN;
+static void mini_httpd(int server_socket)
+{
+ /* NB: it's best to not use xfuncs in this loop before fork().
+ * Otherwise server may die on transient errors (temporary
+ * out-of-memory condition, etc), which is Bad(tm).
+ * Try to do any dangerous calls after fork.
+ */
+ while (1) {
+ int n;
+ len_and_sockaddr fromAddr;
+
+ /* Wait for connections... */
+ fromAddr.len = LSA_SIZEOF_SA;
+ n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
+ if (n < 0)
+ continue;
+
+ /* set the KEEPALIVE option to cull dead connections */
+ setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
+
+ if (fork() == 0) {
+ /* child */
+ /* Do not reload config on HUP */
+ signal(SIGHUP, SIG_IGN);
+ close(server_socket);
+ xmove_fd(n, 0);
+ xdup2(0, 1);
+
+ handle_incoming_and_exit(&fromAddr);
+ }
+ /* parent, or fork failed */
+ close(n);
+ } /* while (1) */
+ /* never reached */
+}
+#else
+static void mini_httpd_nommu(int server_socket, int argc, char **argv) NORETURN;
+static void mini_httpd_nommu(int server_socket, int argc, char **argv)
+{
+ char *argv_copy[argc + 2];
+
+ argv_copy[0] = argv[0];
+ argv_copy[1] = (char*)"-i";
+ memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
+
+ /* NB: it's best to not use xfuncs in this loop before vfork().
+ * Otherwise server may die on transient errors (temporary
+ * out-of-memory condition, etc), which is Bad(tm).
+ * Try to do any dangerous calls after fork.
+ */
+ while (1) {
+ int n;
+ len_and_sockaddr fromAddr;
+
+ /* Wait for connections... */
+ fromAddr.len = LSA_SIZEOF_SA;
+ n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
+ if (n < 0)
+ continue;
+
+ /* set the KEEPALIVE option to cull dead connections */
+ setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
+
+ if (vfork() == 0) {
+ /* child */
+ /* Do not reload config on HUP */
+ signal(SIGHUP, SIG_IGN);
+ close(server_socket);
+ xmove_fd(n, 0);
+ xdup2(0, 1);
+
+ /* Run a copy of ourself in inetd mode */
+ re_exec(argv_copy);
+ }
+ argv_copy[0][0] &= 0x7f;
+ /* parent, or vfork failed */
+ close(n);
+ } /* while (1) */
+ /* never reached */
+}
+#endif
+
+/*
+ * Process a HTTP connection on stdin/out.
+ * Never returns.
+ */
+static void mini_httpd_inetd(void) NORETURN;
+static void mini_httpd_inetd(void)
+{
+ len_and_sockaddr fromAddr;
+
+ memset(&fromAddr, 0, sizeof(fromAddr));
+ fromAddr.len = LSA_SIZEOF_SA;
+ /* NB: can fail if user runs it by hand and types in http cmds */
+ getpeername(0, &fromAddr.u.sa, &fromAddr.len);
+ handle_incoming_and_exit(&fromAddr);
+}
+
+static void sighup_handler(int sig UNUSED_PARAM)
+{
+ parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
+}
+
+enum {
+ c_opt_config_file = 0,
+ d_opt_decode_url,
+ h_opt_home_httpd,
+ IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
+ IF_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
+ IF_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
+ IF_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
+ p_opt_port ,
+ p_opt_inetd ,
+ p_opt_foreground,
+ p_opt_verbose ,
+ 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 = IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
+ OPT_REALM = IF_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
+ OPT_MD5 = IF_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
+ OPT_SETUID = IF_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,
+ OPT_VERBOSE = 1 << p_opt_verbose,
+};
+
+
+int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int httpd_main(int argc UNUSED_PARAM, char **argv)
+{
+ int server_socket = server_socket; /* for gcc */
+ unsigned opt;
+ char *url_for_decode;
+ IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
+ IF_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
+ IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
+ IF_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
+
+ INIT_G();
+
+#if ENABLE_LOCALE_SUPPORT
+ /* Undo busybox.c: we want to speak English in http (dates etc) */
+ setlocale(LC_TIME, "C");
+#endif
+
+ home_httpd = xrealloc_getcwd_or_warn(NULL);
+ /* -v counts, -i implies -f */
+ opt_complementary = "vv:if";
+ /* We do not "absolutize" path given by -h (home) opt.
+ * If user gives relative path in -h,
+ * $SCRIPT_FILENAME will not be set. */
+ opt = getopt32(argv, "c:d:h:"
+ IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
+ IF_FEATURE_HTTPD_BASIC_AUTH("r:")
+ IF_FEATURE_HTTPD_AUTH_MD5("m:")
+ IF_FEATURE_HTTPD_SETUID("u:")
+ "p:ifv",
+ &opt_c_configFile, &url_for_decode, &home_httpd
+ IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
+ IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
+ IF_FEATURE_HTTPD_AUTH_MD5(, &pass)
+ IF_FEATURE_HTTPD_SETUID(, &s_ugid)
+ , &bind_addr_or_port
+ , &verbose
+ );
+ if (opt & OPT_DECODE_URL) {
+ fputs(percent_decode_in_place(url_for_decode, /*strict:*/ 0), stdout);
+ return 0;
+ }
+#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
+ if (opt & OPT_ENCODE_URL) {
+ fputs(encodeString(url_for_encode), stdout);
+ return 0;
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_AUTH_MD5
+ if (opt & OPT_MD5) {
+ char salt[sizeof("$1$XXXXXXXX")];
+ salt[0] = '$';
+ salt[1] = '1';
+ salt[2] = '$';
+ crypt_make_salt(salt + 3, 4);
+ puts(pw_encrypt(pass, salt, /*cleanup:*/ 0));
+ return 0;
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_SETUID
+ if (opt & OPT_SETUID) {
+ xget_uidgid(&ugid, s_ugid);
+ }
+#endif
+
+#if !BB_MMU
+ if (!(opt & OPT_FOREGROUND)) {
+ bb_daemonize_or_rexec(0, argv); /* don't change current directory */
+ }
+#endif
+
+ xchdir(home_httpd);
+ if (!(opt & OPT_INETD)) {
+ signal(SIGCHLD, SIG_IGN);
+ 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
+ }
+
+#if 0
+ /* User can do it himself: 'env - PATH="$PATH" httpd'
+ * We don't do it because we don't want to screw users
+ * which want to do
+ * 'env - VAR1=val1 VAR2=val2 httpd'
+ * and have VAR1 and VAR2 values visible in their CGIs.
+ * Besides, it is also smaller. */
+ {
+ char *p = getenv("PATH");
+ /* env strings themself are not freed, no need to xstrdup(p): */
+ clearenv();
+ if (p)
+ putenv(p - 5);
+// if (!(opt & OPT_INETD))
+// setenv_long("SERVER_PORT", ???);
+ }
+#endif
+
+ parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
+ if (!(opt & OPT_INETD))
+ signal(SIGHUP, sighup_handler);
+
+ xfunc_error_retval = 0;
+ if (opt & OPT_INETD)
+ mini_httpd_inetd();
+#if BB_MMU
+ if (!(opt & OPT_FOREGROUND))
+ bb_daemonize(0); /* don't change current directory */
+ mini_httpd(server_socket); /* never returns */
+#else
+ mini_httpd_nommu(server_socket, argc, argv); /* never returns */
+#endif
+ /* return 0; */
+}