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diff --git a/i/pc104/initrd/conf/busybox/networking/httpd.c b/i/pc104/initrd/conf/busybox/networking/httpd.c
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+++ b/i/pc104/initrd/conf/busybox/networking/httpd.c
@@ -0,0 +1,2049 @@
+/* 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>
+ *
+ * simplify patch stolen from libbb without using strdup
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ *
+ *****************************************************************************
+ *
+ * Typical usage:
+ * for non root user
+ * httpd -p 8080 -h $HOME/public_html
+ * or for daemon start from rc script with uid=0:
+ * httpd -u www
+ * This is equivalent if www user have uid=80 to
+ * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
+ *
+ *
+ * When a url contains "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.
+ *
+ * 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"
+ * bar=`httpd -e "<Hello World>"` # encode as "&#60Hello&#32World&#62"
+ * Note that url encoding for arguments is not the same as html encoding for
+ * presentation. -d decodes a url-encoded argument while -e encodes in html
+ * for page display.
+ *
+ * httpd.conf has the following format:
+ *
+ * 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
+ * /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/
+ * .au:audio/basic # additional mime type for audio.au files
+ * *.php:/path/php # running cgi.php scripts through an interpreter
+ *
+ * A/D may be as a/d or allow/deny - first char case insensitive
+ * Deny IP rules take precedence over allow rules.
+ *
+ *
+ * The Deny/Allow IP logic:
+ *
+ * - Default is to allow all. No addresses are denied unless
+ * denied with a D: rule.
+ * - Order of Deny/Allow rules is significant
+ * - Deny rules take precedence over allow rules.
+ * - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
+ * addresses.
+ * - Specification of Allow all (A:*) is a no-op
+ *
+ * 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 a 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.
+ *
+ *
+ * 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.
+ *
+*/
+
+#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[] = "./";
+
+#define TIMEOUT 60
+
+// Note: busybox xfuncs are not used because we want the server to keep running
+// if something bad happens due to a malformed user request.
+// As a result, all memory allocation after daemonize
+// is checked rigorously
+
+//#define DEBUG 1
+#define DEBUG 0
+
+#define MAX_MEMORY_BUFF 8192 /* IO buffer */
+
+typedef struct HT_ACCESS {
+ char *after_colon;
+ struct HT_ACCESS *next;
+ char before_colon[1]; /* really bigger, must last */
+} Htaccess;
+
+typedef struct HT_ACCESS_IP {
+ unsigned int ip;
+ unsigned int mask;
+ int allow_deny;
+ struct HT_ACCESS_IP *next;
+} Htaccess_IP;
+
+typedef struct {
+ char buf[MAX_MEMORY_BUFF];
+
+ USE_FEATURE_HTTPD_BASIC_AUTH(const char *realm;)
+ USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
+
+ const char *query;
+
+ USE_FEATURE_HTTPD_CGI(char *referer;)
+
+ const char *configFile;
+
+ unsigned int rmt_ip;
+#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 */
+ 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;
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ Htaccess *auth; /* config user:password lines */
+#endif
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ Htaccess *mime_a; /* config mime types */
+#endif
+
+ int server_socket;
+ int accepted_socket;
+ volatile int alarm_signaled;
+
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ Htaccess *script_i; /* config script interpreters */
+#endif
+} HttpdConfig;
+
+static HttpdConfig *config;
+
+static const char request_GET[] = "GET"; /* size algorithmic optimize */
+
+static const char* const suffixTable [] = {
+/* Warning: shorted equivalent suffix in one line must be first */
+ ".htm.html", "text/html",
+ ".jpg.jpeg", "image/jpeg",
+ ".gif", "image/gif",
+ ".png", "image/png",
+ ".txt.h.c.cc.cpp", "text/plain",
+ ".css", "text/css",
+ ".wav", "audio/wav",
+ ".avi", "video/x-msvideo",
+ ".qt.mov", "video/quicktime",
+ ".mpe.mpeg", "video/mpeg",
+ ".mid.midi", "audio/midi",
+ ".mp3", "audio/mpeg",
+#if 0 /* unpopular */
+ ".au", "audio/basic",
+ ".pac", "application/x-ns-proxy-autoconfig",
+ ".vrml.wrl", "model/vrml",
+#endif
+ 0, "application/octet-stream" /* default */
+};
+
+typedef enum {
+ HTTP_OK = 200,
+ 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,
+#if 0 /* future use */
+ HTTP_CONTINUE = 100,
+ 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 */
+ HTTP_RESPONSE_SETSIZE = 0xffffffff
+#endif
+} HttpResponseNum;
+
+typedef struct {
+ HttpResponseNum type;
+ const char *name;
+ const char *info;
+} HttpEnumString;
+
+static const HttpEnumString httpResponseNames[] = {
+ { HTTP_OK, "OK", NULL },
+ { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
+ { HTTP_REQUEST_TIMEOUT, "Request Timeout",
+ "No request appeared within a reasonable time period." },
+ { HTTP_NOT_IMPLEMENTED, "Not Implemented",
+ "The requested method is not recognized by this server." },
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ { HTTP_UNAUTHORIZED, "Unauthorized", "" },
+#endif
+ { HTTP_NOT_FOUND, "Not Found",
+ "The requested URL was not found on this server." },
+ { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
+ { HTTP_FORBIDDEN, "Forbidden", "" },
+ { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
+ "Internal Server Error" },
+#if 0 /* not implemented */
+ { HTTP_CREATED, "Created" },
+ { HTTP_ACCEPTED, "Accepted" },
+ { HTTP_NO_CONTENT, "No Content" },
+ { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
+ { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
+ { HTTP_NOT_MODIFIED, "Not Modified" },
+ { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
+ { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
+#endif
+};
+
+
+static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
+
+
+#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;
+ int j;
+
+ *ip = 0;
+ for (j = 0; j < 4; j++) {
+ unsigned int octet;
+
+ if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
+ 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 != 0)
+ auto_mask += 8;
+ *ip = ((*ip) << 8) | octet;
+ }
+ if (*p != 0) {
+ if (*p != endc)
+ return -auto_mask;
+ p++;
+ if (*p == 0)
+ return -auto_mask;
+ }
+ *ep = p;
+ return auto_mask;
+}
+
+static int scan_ip_mask(const char *ipm, unsigned int *ip, unsigned int *mask)
+{
+ int i;
+ unsigned int msk;
+
+ i = scan_ip(&ipm, ip, '/');
+ if (i < 0)
+ return i;
+ if (*ipm) {
+ const char *p = ipm;
+
+ i = 0;
+ while (*p) {
+ if (*p < '0' || *p > '9') {
+ if (*p == '.') {
+ i = scan_ip(&ipm, mask, 0);
+ return i != 32;
+ }
+ return -1;
+ }
+ i *= 10;
+ i += *p - '0';
+ p++;
+ }
+ }
+ if (i > 32 || i < 0)
+ return -1;
+ msk = 0x80000000;
+ *mask = 0;
+ while (i > 0) {
+ *mask |= msk;
+ msk >>= 1;
+ i--;
+ }
+ return 0;
+}
+
+#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;
+
+ while (prev) {
+ Htaccess *cur = prev;
+
+ prev = cur->next;
+ free(cur);
+ }
+ *pprev = NULL;
+}
+#endif
+
+/* flag */
+#define FIRST_PARSE 0
+#define SUBDIR_PARSE 1
+#define SIGNALED_PARSE 2
+#define FIND_FROM_HTTPD_ROOT 3
+/****************************************************************************
+ *
+ > $Function: parse_conf()
+ *
+ * $Description: parse configuration file into in-memory linked list.
+ *
+ * The first non-white character is examined to determine if the config line
+ * is one of the following:
+ * .ext:mime/type # new mime type not compiled into httpd
+ * [adAD]:from # ip address allow/deny, * for wildcard
+ * /path:user:pass # username/password
+ *
+ * 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.
+ *
+ * $Parameters:
+ * (const char *) path . . null for ip address checks, path for password
+ * checks.
+ * (int) flag . . . . . . the source of the parse request.
+ *
+ * $Return: (None)
+ *
+ ****************************************************************************/
+static void parse_conf(const char *path, int flag)
+{
+ FILE *f;
+#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
+
+ const char *cf = config->configFile;
+ char buf[160];
+ char *p0 = NULL;
+ char *c, *p;
+
+ /* free previous ip setup if present */
+ Htaccess_IP *pip = config->ip_a_d;
+
+ while (pip) {
+ Htaccess_IP *cur_ipl = pip;
+
+ pip = cur_ipl->next;
+ free(cur_ipl);
+ }
+ config->ip_a_d = NULL;
+
+ config->flg_deny_all = 0;
+
+#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) {
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ free_config_lines(&config->auth);
+#endif
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ free_config_lines(&config->mime_a);
+#endif
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ free_config_lines(&config->script_i);
+#endif
+ }
+#endif
+
+ if (flag == SUBDIR_PARSE || cf == NULL) {
+ cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
+ if (cf == NULL) {
+ if (flag == FIRST_PARSE)
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
+ return;
+ }
+ sprintf((char *)cf, "%s/%s", path, httpd_conf);
+ }
+
+ while ((f = fopen(cf, "r")) == NULL) {
+ if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
+ /* config file not found, no changes to config */
+ return;
+ }
+ if (config->configFile && flag == FIRST_PARSE) /* if -c option given */
+ bb_perror_msg_and_die("%s", cf);
+ flag = FIND_FROM_HTTPD_ROOT;
+ cf = httpd_conf;
+ }
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ prev = config->auth;
+#endif
+ /* This could stand some work */
+ while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
+ c = NULL;
+ for (p = p0; *p0 != 0 && *p0 != '#'; p0++) {
+ if (!isspace(*p0)) {
+ *p++ = *p0;
+ if (*p0 == ':' && c == NULL)
+ c = p;
+ }
+ }
+ *p = 0;
+
+ /* test for empty or strange line */
+ if (c == NULL || *c == 0)
+ continue;
+ p0 = buf;
+ if (*p0 == 'd')
+ *p0 = 'D';
+ if (*c == '*') {
+ if (*p0 == 'D') {
+ /* memorize deny all */
+ config->flg_deny_all++;
+ }
+ /* skip default other "word:*" config lines */
+ continue;
+ }
+
+ if (*p0 == 'a')
+ *p0 = 'A';
+ else if (*p0 != 'D' && *p0 != 'A'
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ && *p0 != '/'
+#endif
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ && *p0 != '.'
+#endif
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ && *p0 != '*'
+#endif
+ )
+ continue;
+ if (*p0 == 'A' || *p0 == 'D') {
+ /* storing current config IP line */
+ pip = xzalloc(sizeof(Htaccess_IP));
+ if (pip) {
+ if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) {
+ /* syntax IP{/mask} error detected, protect all */
+ *p0 = 'D';
+ pip->mask = 0;
+ }
+ pip->allow_deny = *p0;
+ if (*p0 == 'D') {
+ /* Deny:form_IP move top */
+ pip->next = config->ip_a_d;
+ config->ip_a_d = pip;
+ } else {
+ /* add to bottom A:form_IP config line */
+ Htaccess_IP *prev_IP = config->ip_a_d;
+
+ if (prev_IP == NULL) {
+ config->ip_a_d = pip;
+ } else {
+ while (prev_IP->next)
+ prev_IP = prev_IP->next;
+ prev_IP->next = pip;
+ }
+ }
+ }
+ continue;
+ }
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (*p0 == '/') {
+ /* make full path from httpd root / curent_path / config_line_path */
+ cf = flag == SUBDIR_PARSE ? path : "";
+ p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
+ if (p0 == NULL)
+ continue;
+ c[-1] = 0;
+ sprintf(p0, "/%s%s", cf, buf);
+
+ /* another call bb_simplify_path */
+ cf = p = p0;
+
+ do {
+ if (*p == '/') {
+ if (*cf == '/') { /* skip duplicate (or initial) slash */
+ continue;
+ } else if (*cf == '.') {
+ if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
+ continue;
+ } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
+ ++cf;
+ if (p > p0) {
+ while (*--p != '/') /* omit previous dir */;
+ }
+ continue;
+ }
+ }
+ }
+ *++p = *cf;
+ } while (*++cf);
+
+ if ((p == p0) || (*p != '/')) { /* not a trailing slash */
+ ++p; /* so keep last character */
+ }
+ *p = 0;
+ sprintf(p0, "%s:%s", p0, c);
+ }
+#endif
+
+#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 = xzalloc(sizeof(Htaccess) + strlen(p0));
+ if (cur) {
+ cf = strcpy(cur->before_colon, p0);
+ c = strchr(cf, ':');
+ *c++ = 0;
+ cur->after_colon = c;
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ if (*cf == '.') {
+ /* config .mime line move top for overwrite previous */
+ cur->next = config->mime_a;
+ config->mime_a = cur;
+ continue;
+ }
+#endif
+#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;
+ config->script_i = cur;
+ continue;
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ free(p0);
+ if (prev == NULL) {
+ /* first line */
+ config->auth = prev = cur;
+ } else {
+ /* sort path, if current lenght eq or bigger then move up */
+ Htaccess *prev_hti = config->auth;
+ size_t l = strlen(cf);
+ Htaccess *hti;
+
+ for (hti = prev_hti; hti; hti = hti->next) {
+ if (l >= strlen(hti->before_colon)) {
+ /* insert before hti */
+ cur->next = hti;
+ if (prev_hti != hti) {
+ prev_hti->next = cur;
+ } else {
+ /* insert as top */
+ config->auth = cur;
+ }
+ break;
+ }
+ if (prev_hti != hti)
+ prev_hti = prev_hti->next;
+ }
+ if (!hti) { /* not inserted, add to bottom */
+ prev->next = cur;
+ prev = cur;
+ }
+ }
+#endif
+ }
+#endif
+ }
+ fclose(f);
+}
+
+#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
+/****************************************************************************
+ *
+ > $Function: encodeString()
+ *
+ * $Description: 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().
+ *
+ * $Parameters:
+ * (const char *) string . . The first string to encode.
+ *
+ * $Return: (char *) . . . .. . . A pointer to the encoded string.
+ *
+ * $Errors: Returns a null string ("") if memory is not available.
+ *
+ ****************************************************************************/
+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++)) {
+ // 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 /* FEATURE_HTTPD_ENCODE_URL_STR */
+
+/****************************************************************************
+ *
+ > $Function: decodeString()
+ *
+ * $Description: Given a URL encoded string, convert it to plain ascii.
+ * Since decoding always makes strings smaller, the decode is done in-place.
+ * Thus, callers should strdup() the argument if they do not want the
+ * argument modified. The return is the original pointer, allowing this
+ * function to be easily used as arguments to other functions.
+ *
+ * $Parameters:
+ * (char *) string . . . The first string to decode.
+ * (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 option_d)
+{
+ /* note that decoded string is always shorter than original */
+ char *string = orig;
+ char *ptr = string;
+ char c;
+
+ 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;
+}
+
+
+#if ENABLE_FEATURE_HTTPD_CGI
+/****************************************************************************
+ * setenv helpers
+ ****************************************************************************/
+static void setenv1(const char *name, const char *value)
+{
+ if (!value)
+ value = "";
+ setenv(name, value, 1);
+}
+static void setenv_long(const char *name, long value)
+{
+ char buf[sizeof(value)*3 + 1];
+ sprintf(buf, "%ld", value);
+ setenv(name, buf, 1);
+}
+#endif
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+/****************************************************************************
+ *
+ > $Function: decodeBase64()
+ *
+ > $Description: Decode a base 64 data stream as per rfc1521.
+ * Note that the rfc states that none 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:
+ * (char *) Data . . . . A pointer to a base64 encoded string.
+ * Where to place the decoded data.
+ *
+ * $Return: void
+ *
+ * $Errors: None
+ *
+ ****************************************************************************/
+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 long 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
+
+
+/****************************************************************************
+ *
+ > $Function: openServer()
+ *
+ * $Description: create a listen server socket on the designated port.
+ *
+ * $Return: (int) . . . A connection socket. -1 for errors.
+ *
+ * $Errors: None
+ *
+ ****************************************************************************/
+static int openServer(void)
+{
+ int fd;
+
+ /* create the socket right now */
+ fd = create_and_bind_stream_or_die(NULL, config->port);
+ xlisten(fd, 9);
+ return fd;
+}
+
+/****************************************************************************
+ *
+ > $Function: sendHeaders()
+ *
+ * $Description: 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.
+ *
+ * $Parameter:
+ * (HttpResponseNum) responseNum . . . The result code to send.
+ *
+ * $Return: (int) . . . . writing errors
+ *
+ ****************************************************************************/
+static int sendHeaders(HttpResponseNum responseNum)
+{
+ char *buf = config->buf;
+ const char *responseString = "";
+ const char *infoString = 0;
+ const char *mime_type;
+ unsigned i;
+ time_t timer = time(0);
+ char timeStr[80];
+ int len;
+ enum {
+ numNames = sizeof(httpResponseNames) / sizeof(httpResponseNames[0])
+ };
+
+ for (i = 0; i < numNames; i++) {
+ if (httpResponseNames[i].type == responseNum) {
+ responseString = httpResponseNames[i].name;
+ infoString = httpResponseNames[i].info;
+ break;
+ }
+ }
+ /* error message is HTML */
+ mime_type = responseNum == HTTP_OK ?
+ 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",
+ responseNum, responseString, mime_type, timeStr);
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (responseNum == HTTP_UNAUTHORIZED) {
+ 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->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 %"OFF_FMT"d\r\n",
+ timeStr, "Content-length:", config->ContentLength);
+ }
+ strcat(buf, "\r\n");
+ len += 2;
+ if (infoString) {
+ len += sprintf(buf+len,
+ "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
+ "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
+ responseNum, responseString,
+ responseNum, responseString, infoString);
+ }
+ 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);
+}
+
+/****************************************************************************
+ *
+ > $Function: getLine()
+ *
+ * $Description: Read from the socket until an end of line char found.
+ *
+ * Characters are read one at a time until an eol sequence is found.
+ *
+ * $Return: (int) . . . . number of characters read. -1 if error.
+ *
+ ****************************************************************************/
+static int getLine(void)
+{
+ int count = 0;
+ char *buf = config->buf;
+
+ 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 overflow */
+ count++;
+ }
+ if (count) return count;
+ else return -1;
+}
+
+#if ENABLE_FEATURE_HTTPD_CGI
+/****************************************************************************
+ *
+ > $Function: sendCgi()
+ *
+ * $Description: Execute a CGI script and send it's stdout back
+ *
+ * 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 /).
+ * (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).
+ *
+ * $Errors: None
+ *
+ ****************************************************************************/
+static int sendCgi(const char *url,
+ 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 */
+
+ static char * argp[] = { 0, 0 };
+ int pid = 0;
+ int inFd;
+ int outFd;
+ int buf_count;
+ int status;
+ size_t post_read_size, post_read_idx;
+
+ if (pipe(fromCgi) != 0)
+ return 0;
+ if (pipe(toCgi) != 0)
+ return 0;
+
+/*
+ * 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 (pid < 0)
+ return 0;
+
+ 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)
+ 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;
+ }
+ }
+ }
+#endif
+ *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 */
+
+ /* parent process */
+
+ 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);
+
+ 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) {
+ /* Weird. CGI didn't exit and no fd's
+ * are ready, yet select returned?! */
+ continue;
+ }
+ 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;
+ }
+
+ 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
+ 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 */
+ }
+ 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;
+ }
+ /* 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 /* FEATURE_HTTPD_CGI */
+
+/****************************************************************************
+ *
+ > $Function: sendFile()
+ *
+ * $Description: Send a file response to a HTTP request
+ *
+ * $Parameter:
+ * (const char *) url . . The URL requested.
+ *
+ * $Return: (int) . . . . . . Always 0.
+ *
+ ****************************************************************************/
+static int sendFile(const char *url)
+{
+ char * suffix;
+ int f;
+ const char * const * table;
+ const char * try_suffix;
+
+ suffix = strrchr(url, '.');
+
+ for (table = suffixTable; *table; table += 2)
+ if (suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
+ try_suffix += strlen(suffix);
+ if (*try_suffix == 0 || *try_suffix == '.')
+ break;
+ }
+ /* also, if not found, set default as "application/octet-stream"; */
+ 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->found_mime_type = cur->after_colon;
+ break;
+ }
+ }
+ }
+#endif /* FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
+
+ if (DEBUG)
+ fprintf(stderr, "sending file '%s' content-type: %s\n",
+ url, config->found_mime_type);
+
+ f = open(url, O_RDONLY);
+ if (f >= 0) {
+ int count;
+ char *buf = config->buf;
+
+ sendHeaders(HTTP_OK);
+ /* TODO: sendfile() */
+ while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
+ 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("cannot open '%s'", url);
+ sendHeaders(HTTP_NOT_FOUND);
+ }
+
+ return 0;
+}
+
+static int checkPermIP(void)
+{
+ Htaccess_IP * cur;
+
+ /* This could stand some work */
+ for (cur = config->ip_a_d; cur; cur = cur->next) {
+#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),
+ (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 */
+ }
+
+ /* if unconfigured, return 1 - access from all */
+ return !config->flg_deny_all;
+}
+
+/****************************************************************************
+ *
+ > $Function: checkPerm()
+ *
+ * $Description: Check the permission file for access password protected.
+ *
+ * If config file isn't present, everything is allowed.
+ * Entries are of the form you can see example from header source
+ *
+ * $Parameters:
+ * (const char *) path . . . . The file path.
+ * (const char *) request . . . User information to validate.
+ *
+ * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
+ *
+ ****************************************************************************/
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+static int checkPerm(const char *path, const char *request)
+{
+ Htaccess * cur;
+ const char *p;
+ const char *p0;
+
+ const char *prev = NULL;
+
+ /* This could stand some work */
+ for (cur = config->auth; cur; cur = cur->next) {
+ size_t l;
+
+ p0 = cur->before_colon;
+ if (prev != NULL && strcmp(prev, p0) != 0)
+ continue; /* find next identical */
+ p = cur->after_colon;
+ if (DEBUG)
+ fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
+
+ l = strlen(p0);
+ if (strncmp(p0, path, l) == 0
+ && (l == 1 || path[l] == '/' || path[l] == '\0')
+ ) {
+ char *u;
+ /* path match found. Check request */
+ /* for check next /path:user:password */
+ prev = p0;
+ u = strchr(request, ':');
+ if (u == NULL) {
+ /* bad request, ':' required */
+ break;
+ }
+
+ if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
+ char *cipher;
+ char *pp;
+
+ if (strncmp(p, request, u-request) != 0) {
+ /* user uncompared */
+ continue;
+ }
+ pp = strchr(p, ':');
+ if (pp && pp[1] == '$' && 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;
+ }
+ }
+
+ 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 /* FEATURE_HTTPD_BASIC_AUTH */
+
+/****************************************************************************
+ *
+ > $Function: handle_sigalrm()
+ *
+ * $Description: Handle timeouts
+ *
+ ****************************************************************************/
+
+static void handle_sigalrm(int sig)
+{
+ sendHeaders(HTTP_REQUEST_TIMEOUT);
+ config->alarm_signaled = sig;
+}
+
+/****************************************************************************
+ *
+ > $Function: handleIncoming()
+ *
+ * $Description: Handle an incoming http request.
+ *
+ ****************************************************************************/
+static void handleIncoming(void)
+{
+ char *buf = config->buf;
+ char *url;
+ char *purl;
+ int blank = -1;
+ char *test;
+ struct stat sb;
+ int ip_allowed;
+#if ENABLE_FEATURE_HTTPD_CGI
+ const char *prequest = request_GET;
+ unsigned long length = 0;
+ char *cookie = 0;
+ char *content_type = 0;
+#endif
+ fd_set s_fd;
+ struct timeval tv;
+ int retval;
+ struct sigaction sa;
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ int credentials = -1; /* if not required this is Ok */
+#endif
+
+ sa.sa_handler = handle_sigalrm;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0; /* no SA_RESTART */
+ sigaction(SIGALRM, &sa, NULL);
+
+ do {
+ int count;
+
+ (void) alarm(TIMEOUT);
+ if (getLine() <= 0)
+ break; /* closed */
+
+ purl = strpbrk(buf, " \t");
+ if (purl == NULL) {
+ BAD_REQUEST:
+ sendHeaders(HTTP_BAD_REQUEST);
+ break;
+ }
+ *purl = '\0';
+#if ENABLE_FEATURE_HTTPD_CGI
+ if (strcasecmp(buf, prequest) != 0) {
+ prequest = "POST";
+ if (strcasecmp(buf, prequest) != 0) {
+ sendHeaders(HTTP_NOT_IMPLEMENTED);
+ break;
+ }
+ }
+#else
+ if (strcasecmp(buf, request_GET) != 0) {
+ sendHeaders(HTTP_NOT_IMPLEMENTED);
+ break;
+ }
+#endif
+ *purl = ' ';
+ count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
+
+ if (count < 1 || buf[0] != '/') {
+ /* Garbled request/URL */
+ goto BAD_REQUEST;
+ }
+ url = alloca(strlen(buf) + sizeof("/index.html"));
+ if (url == NULL) {
+ sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
+ break;
+ }
+ strcpy(url, buf);
+ /* extract url args if present */
+ test = strchr(url, '?');
+ config->query = NULL;
+ if (test) {
+ *test++ = '\0';
+ config->query = test;
+ }
+
+ test = decodeString(url, 0);
+ if (test == NULL)
+ goto BAD_REQUEST;
+ 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 */
+ purl = test = url;
+ do {
+ if (*purl == '/') {
+ /* skip duplicate (or initial) slash */
+ if (*test == '/') {
+ continue;
+ }
+ if (*test == '.') {
+ /* skip extra '.' */
+ if (test[1] == '/' || test[1] == 0) {
+ continue;
+ } 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;
+ }
+ }
+ }
+ *++purl = *test;
+ } while (*++test);
+ *++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->found_moved_temporarily = url;
+ }
+ }
+ if (DEBUG)
+ fprintf(stderr, "url='%s', args=%s\n", url, config->query);
+
+ test = url;
+ ip_allowed = checkPermIP();
+ while (ip_allowed && (test = strchr(test + 1, '/')) != NULL) {
+ /* have path1/path2 */
+ *test = '\0';
+ if (is_directory(url + 1, 1, &sb)) {
+ /* may be having subdir config */
+ parse_conf(url + 1, SUBDIR_PARSE);
+ ip_allowed = checkPermIP();
+ }
+ *test = '/';
+ }
+ if (blank >= 0) {
+ /* 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);
+
+#if ENABLE_FEATURE_HTTPD_CGI
+ /* try and do our best to parse more lines */
+ 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
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (STRNCASECMP(buf, "Authorization:") == 0) {
+ /* We only allow Basic credentials.
+ * It shows up as "Authorization: Basic <userid:password>" where
+ * the userid:password is base64 encoded.
+ */
+ test = skip_whitespace(buf + sizeof("Authorization:")-1);
+ if (STRNCASECMP(test, "Basic") != 0)
+ continue;
+ test += sizeof("Basic")-1;
+ /* decodeBase64() skips whitespace itself */
+ decodeBase64(test);
+ credentials = checkPerm(url, test);
+ }
+#endif /* FEATURE_HTTPD_BASIC_AUTH */
+
+ } /* while extra header reading */
+ }
+ 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 */
+#if ENABLE_FEATURE_HTTPD_CGI
+ FORBIDDEN: /* protect listing /cgi-bin */
+#endif
+ sendHeaders(HTTP_FORBIDDEN);
+ break;
+ }
+
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ if (credentials <= 0 && checkPerm(url, ":") == 0) {
+ sendHeaders(HTTP_UNAUTHORIZED);
+ break;
+ }
+#endif
+
+ if (config->found_moved_temporarily) {
+ sendHeaders(HTTP_MOVED_TEMPORARILY);
+ /* clear unforked memory flag */
+ config->found_moved_temporarily = NULL;
+ break;
+ }
+
+ test = url + 1; /* skip first '/' */
+
+#if ENABLE_FEATURE_HTTPD_CGI
+ if (strncmp(test, "cgi-bin", 7) == 0) {
+ if (test[7] == '/' && test[8] == 0)
+ goto FORBIDDEN; /* protect listing cgi-bin/ */
+ sendCgi(url, prequest, length, cookie, content_type);
+ 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;
+ }
+ }
+ }
+ }
+#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
+
+ if (DEBUG)
+ fprintf(stderr, "closing socket\n\n");
+#if ENABLE_FEATURE_HTTPD_CGI
+ free(cookie);
+ free(content_type);
+ free(config->referer);
+ config->referer = NULL;
+# if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ free(config->remoteuser);
+ config->remoteuser = NULL;
+# endif
+#endif
+ shutdown(config->accepted_socket, SHUT_WR);
+
+ /* Properly wait for remote to closed */
+ FD_ZERO(&s_fd);
+ FD_SET(config->accepted_socket, &s_fd);
+
+ do {
+ 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(config->accepted_socket, SHUT_RD);
+ /* In inetd case, we close fd 1 (stdout) here. We will exit soon anyway */
+ close(config->accepted_socket);
+}
+
+/****************************************************************************
+ *
+ > $Function: miniHttpd()
+ *
+ * $Description: The main http server function.
+ *
+ * Given an open socket fildes, listen for new connections and farm out
+ * the processing as a forked process.
+ *
+ * $Parameters:
+ * (int) server. . . The server socket fildes.
+ *
+ * $Return: (int) . . . . Always 0.
+ *
+ ****************************************************************************/
+static int miniHttpd(int server)
+{
+ fd_set readfd, portfd;
+
+ FD_ZERO(&portfd);
+ FD_SET(server, &portfd);
+
+ /* copy the ports we are watching to the readfd set */
+ while (1) {
+ 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! */
+ 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 '%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
+
+ /* set the KEEPALIVE option to cull dead connections */
+ setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
+
+ if (DEBUG || fork() == 0) {
+ /* child */
+#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+ /* protect reload config, may be confuse checking */
+ signal(SIGHUP, SIG_IGN);
+#endif
+ handleIncoming();
+ if (!DEBUG)
+ exit(0);
+ }
+ close(s);
+ } /* while (1) */
+ return 0;
+}
+
+/* from inetd */
+static int miniHttpd_inetd(void)
+{
+ 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
+ handleIncoming();
+ return 0;
+}
+
+#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+static void sighup_handler(int sig)
+{
+ /* set and reset */
+ struct sigaction sa;
+
+ parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
+ sa.sa_handler = sighup_handler;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGHUP, &sa, NULL);
+}
+#endif
+
+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 ,)
+ 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:"
+ USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
+ USE_FEATURE_HTTPD_BASIC_AUTH("r:")
+ USE_FEATURE_HTTPD_AUTH_MD5("m:")
+ USE_FEATURE_HTTPD_SETUID("u:")
+ "p:if";
+
+
+int httpd_main(int argc, char *argv[]);
+int httpd_main(int argc, char *argv[])
+{
+ unsigned opt;
+ const char *home_httpd = home;
+ char *url_for_decode;
+ USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
+ const char *s_port;
+ USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
+ USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
+ USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
+
+#if ENABLE_LOCALE_SUPPORT
+ /* Undo busybox.c: we want to speak English in http (dates etc) */
+ setlocale(LC_TIME, "C");
+#endif
+
+ config = xzalloc(sizeof(*config));
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ config->realm = "Web Server Authentication";
+#endif
+ config->port = 80;
+ config->ContentLength = -1;
+
+ 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_ugid)
+ , &s_port
+ );
+ if (opt & OPT_DECODE_URL) {
+ printf("%s", decodeString(url_for_decode, 1));
+ return 0;
+ }
+#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
+ if (opt & OPT_ENCODE_URL) {
+ printf("%s", encodeString(url_for_encode));
+ return 0;
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_AUTH_MD5
+ if (opt & OPT_MD5) {
+ puts(pw_encrypt(pass, "$1$"));
+ return 0;
+ }
+#endif
+ if (opt & OPT_PORT)
+ config->port = xatou16(s_port);
+
+#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
+
+ xchdir(home_httpd);
+ 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
+ }
+
+#if ENABLE_FEATURE_HTTPD_CGI
+ {
+ char *p = getenv("PATH");
+ p = xstrdup(p); /* if gets NULL, returns NULL */
+ clearenv();
+ if (p)
+ setenv1("PATH", p);
+ if (!(opt & OPT_INETD))
+ setenv_long("SERVER_PORT", config->port);
+ }
+#endif
+
+#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+ sighup_handler(0);
+#else
+ parse_conf(default_path_httpd_conf, FIRST_PARSE);
+#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);
+}