* 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.
+ * 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
- * 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"
- *
+ * 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 $PWD -c /etc/httpd.conf -r "Web Server Authentication"
*
- * When a url starts by "/cgi-bin/" it is assumed to be a cgi script. The
- * server changes directory to the location of the script and executes it
+ * When an url starts with "/cgi-bin/" it is assumed to be a cgi script.
+ * The server changes directory to the location of the script and executes it
* after setting QUERY_STRING and other environment variables.
*
+ * If directory URL is given, no index.html is found and CGI support is enabled,
+ * cgi-bin/index.cgi will be run. Directory to list is ../$QUERY_STRING.
+ * See httpd_indexcgi.c for an example GCI code.
+ *
* Doc:
* "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
*
- * The server can also be invoked as a url arg decoder and html text encoder
+ * 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>"
+ * 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 a url-encoded argument while -e encodes in html
+ * 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
* /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 # 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:
+ * *.php:/path/php # run xxx.php through an interpreter
*
- * - Default is to allow all. No addresses are denied unless
- * denied with a D: rule.
- * - Order of Deny/Allow rules is significant
+ * 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.
- * - 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
+ * - "Deny all" rule (D:*) is applied last.
*
* Example:
* 1. Allow only specified addresses
* 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
+ * 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
* 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.
- *
*/
+//config:config HTTPD
+//config: bool "httpd (32 kb)"
+//config: default y
+//config: help
+//config: HTTP server.
+//config:
+//config:config FEATURE_HTTPD_RANGES
+//config: bool "Support 'Ranges:' header"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: Makes httpd emit "Accept-Ranges: bytes" header and understand
+//config: "Range: bytes=NNN-[MMM]" header. Allows for resuming interrupted
+//config: downloads, seeking in multimedia players etc.
+//config:
+//config:config FEATURE_HTTPD_SETUID
+//config: bool "Enable -u <user> option"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows the server to run as a specific user
+//config: rather than defaulting to the user that starts the server.
+//config: Use of this option requires special privileges to change to a
+//config: different user.
+//config:
+//config:config FEATURE_HTTPD_BASIC_AUTH
+//config: bool "Enable HTTP authentication"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: Utilizes password settings from /etc/httpd.conf for basic
+//config: authentication on a per url basis.
+//config: Example for httpd.conf file:
+//config: /adm:toor:PaSsWd
+//config:
+//config:config FEATURE_HTTPD_AUTH_MD5
+//config: bool "Support MD5-encrypted passwords in HTTP authentication"
+//config: default y
+//config: depends on FEATURE_HTTPD_BASIC_AUTH
+//config: help
+//config: Enables encrypted passwords, and wildcard user/passwords
+//config: in httpd.conf file.
+//config: User '*' means 'any system user name is ok',
+//config: password of '*' means 'use system password for this user'
+//config: Examples:
+//config: /adm:toor:$1$P/eKnWXS$aI1aPGxT.dJD5SzqAKWrF0
+//config: /adm:root:*
+//config: /wiki:*:*
+//config:
+//config:config FEATURE_HTTPD_CGI
+//config: bool "Support Common Gateway Interface (CGI)"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows scripts and executables to be invoked
+//config: when specific URLs are requested.
+//config:
+//config:config FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+//config: bool "Support running scripts through an interpreter"
+//config: default y
+//config: depends on FEATURE_HTTPD_CGI
+//config: help
+//config: This option enables support for running scripts through an
+//config: interpreter. Turn this on if you want PHP scripts to work
+//config: properly. You need to supply an additional line in your
+//config: httpd.conf file:
+//config: *.php:/path/to/your/php
+//config:
+//config:config FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+//config: bool "Set REMOTE_PORT environment variable for CGI"
+//config: default y
+//config: depends on FEATURE_HTTPD_CGI
+//config: help
+//config: Use of this option can assist scripts in generating
+//config: references that contain a unique port number.
+//config:
+//config:config FEATURE_HTTPD_ENCODE_URL_STR
+//config: bool "Enable -e option (useful for CGIs written as shell scripts)"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows html encoding of arbitrary strings for display
+//config: by the browser. Output goes to stdout.
+//config: For example, httpd -e "<Hello World>" produces
+//config: "<Hello World>".
+//config:
+//config:config FEATURE_HTTPD_ERROR_PAGES
+//config: bool "Support custom error pages"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows you to define custom error pages in
+//config: the configuration file instead of the default HTTP status
+//config: error pages. For instance, if you add the line:
+//config: E404:/path/e404.html
+//config: in the config file, the server will respond the specified
+//config: '/path/e404.html' file instead of the terse '404 NOT FOUND'
+//config: message.
+//config:
+//config:config FEATURE_HTTPD_PROXY
+//config: bool "Support reverse proxy"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: This option allows you to define URLs that will be forwarded
+//config: to another HTTP server. To setup add the following line to the
+//config: configuration file
+//config: P:/url/:http://hostname[:port]/new/path/
+//config: Then a request to /url/myfile will be forwarded to
+//config: http://hostname[:port]/new/path/myfile.
+//config:
+//config:config FEATURE_HTTPD_GZIP
+//config: bool "Support GZIP content encoding"
+//config: default y
+//config: depends on HTTPD
+//config: help
+//config: Makes httpd send files using GZIP content encoding if the
+//config: client supports it and a pre-compressed <file>.gz exists.
+
+//applet:IF_HTTPD(APPLET(httpd, BB_DIR_USR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_HTTPD) += httpd.o
+
+//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"
+
+/* TODO: use TCP_CORK, parse_config() */
#include "libbb.h"
-#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
-#include <sys/sendfile.h>
+#include "common_bufsiz.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_USE_SENDFILE
+# include <sys/sendfile.h>
#endif
-
-//#define DEBUG 1
-#define DEBUG 0
-
-#define IOBUF_SIZE 8192 /* IO buffer */
-
/* amount of buffering in a pipe */
#ifndef PIPE_BUF
# define PIPE_BUF 4096
#endif
+
+#define DEBUG 0
+
+#define IOBUF_SIZE 8192
+#define MAX_HTTP_HEADERS_SIZE ((8*1024) - 16)
#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 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;
char *url_to;
} Htaccess_Proxy;
+typedef enum CGI_type {
+ CGI_NONE = 0,
+ CGI_NORMAL,
+ CGI_INDEX,
+ CGI_INTERPRETER,
+} CGI_type;
+
enum {
HTTP_OK = 200,
HTTP_PARTIAL_CONTENT = 206,
HTTP_REQUEST_TIMEOUT = 408,
HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
HTTP_INTERNAL_SERVER_ERROR = 500,
+ HTTP_ENTITY_TOO_LARGE = 413,
HTTP_CONTINUE = 100,
#if 0 /* future use */
HTTP_SWITCHING_PROTOCOLS = 101,
HTTP_PAYMENT_REQUIRED = 402,
HTTP_BAD_GATEWAY = 502,
HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
- HTTP_RESPONSE_SETSIZE = 0xffffffff
#endif
};
HTTP_BAD_REQUEST,
HTTP_FORBIDDEN,
HTTP_INTERNAL_SERVER_ERROR,
+ HTTP_ENTITY_TOO_LARGE,
#if 0 /* not implemented */
HTTP_CREATED,
HTTP_ACCEPTED,
{ "Bad Request", "Unsupported method" },
{ "Forbidden", "" },
{ "Internal Server Error", "Internal Server Error" },
+ { "Entity Too Large", "Entity Too Large" },
#if 0 /* not implemented */
{ "Created" },
{ "Accepted" },
#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 */
+#if ENABLE_FEATURE_HTTPD_GZIP
+ /* client can handle gzip / we are going to send gzip */
+ smallint content_gzip;
+#endif
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 *configFile;
+ char *g_query;
+ const char *opt_c_configFile;
const char *home_httpd;
const char *index_page;
const char *found_moved_temporarily;
Htaccess_IP *ip_a_d; /* config allow/deny lines */
- USE_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
- USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
- USE_FEATURE_HTTPD_CGI(char *referer;)
- USE_FEATURE_HTTPD_CGI(char *user_agent;)
+ IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
+ IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
off_t file_size; /* -1 - unknown */
#if ENABLE_FEATURE_HTTPD_RANGES
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
Htaccess *g_auth; /* config user:password lines */
#endif
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
Htaccess *mime_a; /* config mime types */
-#endif
#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 *iobuf; /* [IOBUF_SIZE] */
+#define hdr_buf bb_common_bufsiz1
+#define sizeof_hdr_buf COMMON_BUFSIZE
char *hdr_ptr;
int hdr_cnt;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
#define G (*ptr_to_globals)
#define verbose (G.verbose )
#define flg_deny_all (G.flg_deny_all )
-#define rmt_ip (G.rmt_ip )
+#if ENABLE_FEATURE_HTTPD_GZIP
+# define content_gzip (G.content_gzip )
+#else
+# define content_gzip 0
+#endif
#define bind_addr_or_port (G.bind_addr_or_port)
#define g_query (G.g_query )
-#define configFile (G.configFile )
+#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 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 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 http_error_page (G.http_error_page )
#define proxy (G.proxy )
#define INIT_G() do { \
+ setup_common_bufsiz(); \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
- USE_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
+ 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"; \
+ index_page = index_html; \
file_size = -1; \
} while (0)
-#if !ENABLE_FEATURE_HTTPD_RANGES
-enum {
- range_start = 0,
- range_end = MAXINT(off_t) - 1,
- range_len = MAXINT(off_t),
-};
-#endif
-
#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
SEND_BODY = (1 << 1),
SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
};
-static void send_file_and_exit(const char *url, int what) ATTRIBUTE_NORETURN;
+static void send_file_and_exit(const char *url, int what) NORETURN;
static void free_llist(has_next_ptr **pptr)
{
*pptr = NULL;
}
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
- || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
- || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
{
free_llist((has_next_ptr**)pptr);
}
-#endif
static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
{
/*
* 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
- * Ennn:error.html # error page for status nnn
- * P:/url:[http://]hostname[:port]/new/path # reverse proxy
- *
* 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
* path Path where to look for httpd.conf (without filename).
* flag Type of the parse request.
*/
-/* flag */
-#define FIRST_PARSE 0
-#define SUBDIR_PARSE 1
-#define SIGNALED_PARSE 2
-#define FIND_FROM_HTTPD_ROOT 3
+/* 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;
-#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 = configFile;
+ const char *filename;
char buf[160];
- char *p0;
- char *c, *p;
- Htaccess_IP *pip;
/* discard old rules */
free_Htaccess_IP_list(&ip_a_d);
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) {
+ free_Htaccess_list(&mime_a);
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
free_Htaccess_list(&g_auth);
#endif
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
- free_Htaccess_list(&mime_a);
-#endif
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
free_Htaccess_list(&script_i);
#endif
}
-#endif
- if (flag == SUBDIR_PARSE || cf == NULL) {
- cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
- sprintf((char *)cf, "%s/%s", path, httpd_conf);
+ 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(cf, "r")) == NULL) {
- if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
+ 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 (configFile && flag == FIRST_PARSE) /* if -c option given */
- bb_simple_perror_msg_and_die(cf);
- flag = FIND_FROM_HTTPD_ROOT;
- cf = httpd_conf;
+ 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
- prev = g_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;
+ /* 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 */
}
- *p = '\0';
- /* test for empty or strange line */
- if (c == NULL || *c == '\0')
+ 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;
- p0 = buf;
- if (*p0 == 'd')
- *p0 = 'D';
- if (*c == '*') {
- if (*p0 == 'D') {
- /* memorize deny all */
- flg_deny_all = 1;
- }
- /* skip default other "word:*" config lines */
+ }
+
+ /* 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 (*p0 == 'a')
- *p0 = 'A';
- 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;
+ if (ch == 'A' || ch == 'D') {
+ Htaccess_IP *pip;
+
+ if (*after_colon == '*') {
+ if (ch == 'D') {
+ /* memorize "deny all" */
+ flg_deny_all = 1;
}
- pip->allow_deny = *p0;
- if (*p0 == 'D') {
- /* Deny:from_IP move top */
- pip->next = ip_a_d;
+ /* 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 {
- /* add to bottom A:form_IP config line */
- 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;
- }
+ while (prev_IP->next)
+ prev_IP = prev_IP->next;
+ prev_IP->next = pip;
}
}
continue;
}
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
- if (flag == FIRST_PARSE && *p0 == 'E') {
+ if (flag == FIRST_PARSE && ch == 'E') {
unsigned i;
- /* error status code */
- int status = atoi(++p0);
- /* c already points at the character following ':' in parse loop */
- /* c = strchr(p0, ':'); c++; */
+ int status = atoi(buf + 1); /* error status code */
+
if (status < HTTP_CONTINUE) {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
- 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, c)
- //if (c[0] == '/' || home_httpd[0] != '/')
- http_error_page[i] = xstrdup(c);
- //else
- // http_error_page[i] = concat_path_file(home_httpd, c);
+ /* 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;
}
}
#endif
#if ENABLE_FEATURE_HTTPD_PROXY
- if (flag == FIRST_PARSE && *p0 == 'P') {
+ 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 = c;
- host_port = strchr(c, ':');
+ url_from = after_colon;
+ host_port = strchr(after_colon, ':');
if (host_port == NULL) {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
- continue;
+ goto config_error;
}
*host_port++ = '\0';
- if (strncmp(host_port, "http://", 7) == 0)
+ if (is_prefixed_with(host_port, "http://"))
host_port += 7;
if (*host_port == '\0') {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
- continue;
+ goto config_error;
}
url_to = strchr(host_port, '/');
if (url_to == NULL) {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
- continue;
+ goto config_error;
}
*url_to = '\0';
- proxy_entry = xzalloc(sizeof(Htaccess_Proxy));
+ proxy_entry = xzalloc(sizeof(*proxy_entry));
proxy_entry->url_from = xstrdup(url_from);
proxy_entry->host_port = xstrdup(host_port);
*url_to = '/';
continue;
}
#endif
+ /* the rest of directives are non-alphabetic,
+ * must avoid using "toupper'ed" ch */
+ ch = buf[0];
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (*p0 == '/') {
- /* make full path from httpd root / current_path / config_line_path */
- cf = (flag == SUBDIR_PARSE ? path : "");
- p0 = xmalloc(strlen(cf) + (c - buf) + 2 + strlen(c));
- 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;
- }
- if (*cf == '.') {
- if (cf[1] == '/' || cf[1] == '\0') { /* remove extra '.' */
- continue;
- }
- if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == '\0')) {
- ++cf;
- if (p > p0) {
- while (*--p != '/') /* omit previous dir */;
- }
- continue;
- }
- }
- }
- *++p = *cf;
- } while (*++cf);
+ if (ch == '.' /* ".ext:mime/type" */
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+ || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
+#endif
+ ) {
+ char *p;
+ Htaccess *cur;
- if ((p == p0) || (*p != '/')) { /* not a trailing slash */
- ++p; /* so keep last character */
+ 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;
}
- *p = ':';
- strcpy(p + 1, c);
- }
#endif
-
- if (*p0 == 'I') {
- index_page = xstrdup(c);
continue;
}
-#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));
- cf = strcpy(cur->before_colon, p0);
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (*p0 == '/')
- free(p0);
-#endif
- 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 = mime_a;
- 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 = script_i;
- script_i = cur;
- continue;
- }
-#endif
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (prev == NULL) {
- /* first line */
- g_auth = prev = cur;
- } else {
- /* sort path, if current length eq or bigger then move up */
- Htaccess *prev_hti = g_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 */
- g_auth = cur;
+ 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;
}
- break;
+ authp = &auth->next;
}
- if (prev_hti != hti)
- prev_hti = prev_hti->next;
- }
- if (!hti) { /* not inserted, add to bottom */
- prev->next = cur;
- prev = cur;
+ *authp = cur;
}
+ continue;
}
#endif /* BASIC_AUTH */
-#endif /* BASIC_AUTH || MIME_TYPES || SCRIPT_INTERPR */
- } /* while (fgets) */
- fclose(f);
+
+ /* 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
char *p = out;
char ch;
- while ((ch = *string++)) {
+ 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 += sprintf(p, "&#%u;", (unsigned char) ch);
}
*p = '\0';
return out;
}
-#endif /* FEATURE_HTTPD_ENCODE_URL_STR */
-
-/*
- * 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 xstrdup() 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.
- *
- * string The first string to decode.
- * option_d 1 if called for httpd -d
- *
- * Returns a pointer to the decoded string (same as input).
- */
-static unsigned hex_to_bin(unsigned char c)
-{
- unsigned v;
-
- v = c - '0';
- if (v <= 9)
- return v;
- /* c | 0x20: letters to lower case, non-letters
- * to (potentially different) non-letters */
- v = (unsigned)(c | 0x20) - 'a';
- if (v <= 5)
- return v + 10;
- return ~0;
-}
-/* For testing:
-void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
-int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
-t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
-*/
-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 v;
-
- if (option_d && c == '+') {
- *string++ = ' ';
- continue;
- }
- if (c != '%') {
- *string++ = c;
- continue;
- }
- v = hex_to_bin(ptr[0]);
- if (v > 15) {
- bad_hex:
- if (!option_d)
- return NULL;
- *string++ = '%';
- continue;
- }
- v = (v * 16) | hex_to_bin(ptr[1]);
- if (v > 255)
- goto bad_hex;
- if (!option_d && (v == '/' || v == '\0')) {
- /* caller takes it as indication of invalid
- * (dangerous wrt exploits) chars */
- return orig + 1;
- }
- *string++ = v;
- ptr += 2;
- }
- *string = '\0';
- return orig;
-}
+#endif
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
/*
/*
* Log the connection closure and exit.
*/
-static void log_and_exit(void) ATTRIBUTE_NORETURN;
+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
* second packet is delayed for any reason.
* responseNum - the result code to send.
*/
-static void send_headers(int responseNum)
+static void send_headers(unsigned responseNum)
{
static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
+ /* Fixed size 29-byte string. Example: Sun, 06 Nov 1994 08:49:37 GMT */
+ char date_str[40]; /* using a bit larger buffer to paranoia reasons */
+ struct tm tm;
const char *responseString = "";
const char *infoString = NULL;
- const char *mime_type;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
const char *error_page = NULL;
#endif
+ unsigned len;
unsigned i;
- time_t timer = time(0);
- char tmp_str[80];
- int len;
+ time_t timer = time(NULL);
for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
if (http_response_type[i] == responseNum) {
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));
+ /* We use sprintf, not snprintf (it's less code).
+ * iobuf[] is several kbytes long and all headers we generate
+ * always fit into those kbytes.
+ */
+
+ strftime(date_str, sizeof(date_str), RFC1123FMT, gmtime_r(&timer, &tm));
+ /* ^^^ using gmtime_r() instead of gmtime() to not use static data */
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);
+ "HTTP/1.0 %u %s\r\n"
+ "Date: %s\r\n"
+ "Connection: close\r\n",
+ responseNum, responseString,
+ date_str
+ );
+
+ if (responseNum != HTTP_OK || found_mime_type) {
+ len += sprintf(iobuf + len,
+ "Content-type: %s\r\n",
+ /* if it's error message, then it's HTML */
+ (responseNum != HTTP_OK ? "text/html" : found_mime_type)
+ );
+ }
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
if (responseNum == HTTP_UNAUTHORIZED) {
len += sprintf(iobuf + len,
- "WWW-Authenticate: Basic realm=\"%s\"\r\n",
- g_realm);
+ "WWW-Authenticate: Basic realm=\"%.999s\"\r\n",
+ g_realm /* %.999s protects from overflowing iobuf[] */
+ );
}
#endif
if (responseNum == HTTP_MOVED_TEMPORARILY) {
- len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
+ /* Responding to "GET /dir" with
+ * "HTTP/1.0 302 Found" "Location: /dir/"
+ * - IOW, asking them to repeat with a slash.
+ * Here, overflow IS possible, can't use sprintf:
+ * mkdir test
+ * python -c 'print("get /test?" + ("x" * 8192))' | busybox httpd -i -h .
+ */
+ len += snprintf(iobuf + len, IOBUF_SIZE-3 - len,
+ "Location: %s/%s%s\r\n",
found_moved_temporarily,
(g_query ? "?" : ""),
- (g_query ? g_query : ""));
+ (g_query ? g_query : "")
+ );
+ if (len > IOBUF_SIZE-3)
+ len = IOBUF_SIZE-3;
}
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
if (error_page && access(error_page, R_OK) == 0) {
- strcat(iobuf, "\r\n");
- len += 2;
-
- if (DEBUG)
+ iobuf[len++] = '\r';
+ iobuf[len++] = '\n';
+ if (DEBUG) {
+ iobuf[len] = '\0';
fprintf(stderr, "headers: '%s'\n", iobuf);
+ }
full_write(STDOUT_FILENO, iobuf, len);
if (DEBUG)
fprintf(stderr, "writing error page: '%s'\n", error_page);
#endif
if (file_size != -1) { /* file */
- strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
+ strftime(date_str, sizeof(date_str), RFC1123FMT, gmtime_r(&last_mod, &tm));
#if ENABLE_FEATURE_HTTPD_RANGES
if (responseNum == HTTP_PARTIAL_CONTENT) {
- len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"d-%"OFF_FMT"d/%"OFF_FMT"d\r\n",
+ 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
+ );
file_size = range_end - range_start + 1;
}
#endif
+
+//RFC 2616 4.4 Message Length
+// The transfer-length of a message is the length of the message-body as
+// it appears in the message; that is, after any transfer-codings have
+// been applied. When a message-body is included with a message, the
+// transfer-length of that body is determined by one of the following
+// (in order of precedence):
+// 1.Any response message which "MUST NOT" include a message-body (such
+// as the 1xx, 204, and 304 responses and any response to a HEAD
+// request) is always terminated by the first empty line after the
+// header fields, regardless of the entity-header fields present in
+// the message.
+// 2.If a Transfer-Encoding header field (section 14.41) is present and
+// has any value other than "identity", then the transfer-length is
+// defined by use of the "chunked" transfer-coding (section 3.6),
+// unless the message is terminated by closing the connection.
+// 3.If a Content-Length header field (section 14.13) is present, its
+// decimal value in OCTETs represents both the entity-length and the
+// transfer-length. The Content-Length header field MUST NOT be sent
+// if these two lengths are different (i.e., if a Transfer-Encoding
+// header field is present). If a message is received with both a
+// Transfer-Encoding header field and a Content-Length header field,
+// the latter MUST be ignored.
+// 4.If the message uses the media type "multipart/byteranges" ...
+// 5.By the server closing the connection.
+//
+// (NB: standards do not define "Transfer-Length:" _header_,
+// transfer-length above is just a concept).
+
len += sprintf(iobuf + len,
#if ENABLE_FEATURE_HTTPD_RANGES
"Accept-Ranges: bytes\r\n"
#endif
- "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
- tmp_str,
- "Content-length:",
+ "Last-Modified: %s\r\n"
+ /* Because of 4.4 (5), we can forgo sending of "Content-Length"
+ * since we close connection afterwards, but it helps clients
+ * to e.g. estimate download times, show progress bars etc.
+ * Theoretically we should not send it if page is compressed,
+ * but de-facto standard is to send it (see comment below).
+ */
+ "Content-Length: %"OFF_FMT"u\r\n",
+ date_str,
file_size
);
}
+
+ /* This should be "Transfer-Encoding", not "Content-Encoding":
+ * "data is compressed for transfer", not "data is an archive".
+ * But many clients were not handling "Transfer-Encoding" correctly
+ * (they were not uncompressing gzipped pages, tried to show
+ * raw compressed data), and servers worked around it by using
+ * "Content-Encoding" instead... and this become de-facto standard.
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=68517
+ * https://bugs.chromium.org/p/chromium/issues/detail?id=94730
+ */
+ 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",
+ "<HTML><HEAD><TITLE>%u %s</TITLE></HEAD>\n"
+ "<BODY><H1>%u %s</H1>\n"
+ "%s\n"
+ "</BODY></HTML>\n",
responseNum, responseString,
- responseNum, responseString, infoString);
+ responseNum, responseString,
+ infoString
+ );
}
- if (DEBUG)
+ if (DEBUG) {
+ iobuf[len] = '\0';
fprintf(stderr, "headers: '%s'\n", iobuf);
+ }
if (full_write(STDOUT_FILENO, iobuf, len) != len) {
if (verbose > 1)
bb_perror_msg("error");
}
}
-static void send_headers_and_exit(int responseNum) ATTRIBUTE_NORETURN;
+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.
+ * 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)
+static unsigned get_line(void)
{
- int count = 0;
+ unsigned count;
char c;
+ alarm(HEADER_READ_TIMEOUT);
+ count = 0;
while (1) {
if (hdr_cnt <= 0) {
- hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
+ hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof_hdr_buf);
if (hdr_cnt <= 0)
- break;
+ goto ret;
hdr_ptr = hdr_buf;
}
- iobuf[count] = c = *hdr_ptr++;
hdr_cnt--;
-
+ c = *hdr_ptr++;
if (c == '\r')
continue;
- if (c == '\n') {
- iobuf[count] = '\0';
- return count;
- }
+ if (c == '\n')
+ break;
+ iobuf[count] = c;
if (count < (IOBUF_SIZE - 1)) /* check overflow */
count++;
}
+ ret:
+ iobuf[count] = '\0';
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) ATTRIBUTE_NORETURN;
+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[] */
/* NB: breaking out of this loop jumps to log_and_exit() */
out_cnt = 0;
+ pfd[FROM_CGI].fd = fromCgi_rd;
+ pfd[FROM_CGI].events = POLLIN;
+ pfd[TO_CGI].fd = toCgi_wr;
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;
+ /* Note: even pfd[0].events == 0 won't prevent
+ * revents == POLLHUP|POLLERR reports from closed stdin.
+ * Setting fd to -1 works: */
+ pfd[0].fd = -1;
+ pfd[0].events = POLLIN;
+ pfd[0].revents = 0; /* probably not needed, paranoia */
+
+ /* We always poll this fd, thus kernel always sets revents: */
+ /*pfd[FROM_CGI].events = POLLIN; - moved out of loop */
+ /*pfd[FROM_CGI].revents = 0; - not needed */
+
+ /* gcc-4.8.0 still doesnt fill two shorts with one insn :( */
+ /* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47059 */
+ /* hopefully one day it will... */
+ pfd[TO_CGI].events = POLLOUT;
+ pfd[TO_CGI].revents = 0; /* needed! */
+
+ if (toCgi_wr && hdr_cnt <= 0) {
+ if (post_len > 0) {
+ /* Expect more POST data from network */
+ pfd[0].fd = 0;
} else {
/* post_len <= 0 && hdr_cnt <= 0:
* no more POST data to CGI,
* let CGI see EOF on CGI's stdin */
- close(toCgi_wr);
+ if (toCgi_wr != fromCgi_rd)
+ close(toCgi_wr);
toCgi_wr = 0;
}
}
/* Now wait on the set of sockets */
- count = safe_poll(pfd, 3, -1);
+ count = safe_poll(pfd, hdr_cnt > 0 ? TO_CGI+1 : FROM_CGI+1, -1);
if (count <= 0) {
#if 0
if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
continue;
}
if (DEBUG && WIFEXITED(status))
- bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
+ bb_error_msg("CGI exited, status=%u", WEXITSTATUS(status));
if (DEBUG && WIFSIGNALED(status))
- bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
+ bb_error_msg("CGI killed, signal=%u", WTERMSIG(status));
#endif
break;
}
if (pfd[TO_CGI].revents) {
- /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
+ /* hdr_cnt > 0 here due to the way poll() called */
/* 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
/* 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 = 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));
+ count = safe_read(STDIN_FILENO, hdr_buf, sizeof_hdr_buf);
if (count > 0) {
hdr_cnt = count;
hdr_ptr = hdr_buf;
/* send "HTTP/1.0 " */
if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
break;
- rbuf += 8; /* skip "Status: " */
+ /* skip "Status: " (including space, sending "HTTP/1.0 NNN" is wrong) */
+ rbuf += 8;
count = out_cnt - 8;
out_cnt = -1; /* buffering off */
} else if (out_cnt >= 4) {
*
* 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) ATTRIBUTE_NORETURN;
+ int post_len) 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)
+ int post_len)
{
struct fd_pair fromCgi; /* CGI -> httpd pipe */
struct fd_pair toCgi; /* httpd -> CGI pipe */
- char *script;
+ char *script, *last_slash;
int pid;
/* Make a copy. NB: caller guarantees:
*/
/* Check for [dirs/]script.cgi/PATH_INFO */
- script = (char*)url;
+ last_slash = script = (char*)url;
while ((script = strchr(script + 1, '/')) != NULL) {
- struct stat sb;
-
+ int dir;
*script = '\0';
- if (!is_directory(url + 1, 1, &sb)) {
+ dir = is_directory(url + 1, /*followlinks:*/ 1);
+ *script = '/';
+ if (!dir) {
/* not directory, found script.cgi/PATH_INFO */
- *script = '/';
break;
}
- *script = '/'; /* is directory, find next '/' */
+ /* 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", url, g_query));
+ putenv(xasprintf("%s=%s?%s", "REQUEST_URI", orig_uri, g_query));
} else {
- setenv1("REQUEST_URI", url);
+ setenv1("REQUEST_URI", orig_uri);
}
if (script != NULL)
*script = '\0'; /* cut off /PATH_INFO */
#endif
}
}
- setenv1("HTTP_USER_AGENT", user_agent);
if (post_len)
- putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
- if (cookie)
- setenv1("HTTP_COOKIE", cookie);
- if (content_type)
- setenv1("CONTENT_TYPE", content_type);
+ putenv(xasprintf("CONTENT_LENGTH=%u", post_len));
#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("SERVER_NAME", safe_gethostname()); - don't do this,
+ * just run "env SERVER_NAME=xyz httpd ..." instead */
xpiped_pair(fromCgi);
xpiped_pair(toCgi);
log_and_exit();
}
- if (!pid) {
+ if (pid == 0) {
/* Child process */
char *argv[3];
/* dup2(1, 2); */
/* Chdiring to script's dir */
- script = strrchr(url, '/');
+ script = last_slash;
if (script != url) { /* paranoia */
*script = '\0';
if (chdir(url + 1) != 0) {
- bb_perror_msg("chdir %s", url + 1);
+ bb_perror_msg("can't change directory to '%s'", url + 1);
goto error_execing_cgi;
}
// not needed: *script = '/';
* in the current directory */
execv(argv[0], argv);
if (verbose)
- bb_perror_msg("exec %s", argv[0]);
+ 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) */
* const char *url The requested URL (with leading /).
* what What to send (headers/body/both).
*/
-static void send_file_and_exit(const char *url, int what)
+static NOINLINE void send_file_and_exit(const char *url, int what)
{
- static const char *const suffixTable[] = {
- /* Warning: shorter 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
- NULL
- };
-
char *suffix;
- int f;
- const char *const *table;
- const char *try_suffix;
+ int fd;
ssize_t count;
-#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
- off_t offset;
-#endif
+ 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 to not send "Content-type:" */
+ /*found_mime_type = NULL; - already is */
suffix = strrchr(url, '.');
-
- /* If not found, set default as "application/octet-stream"; */
- found_mime_type = "application/octet-stream";
if (suffix) {
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ 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;
-#endif
- for (table = suffixTable; *table; table += 2) {
- try_suffix = strstr(table[0], suffix);
- if (try_suffix) {
- try_suffix += strlen(suffix);
- if (*try_suffix == '\0' || *try_suffix == '.') {
- found_mime_type = table[1];
- break;
- }
+
+ /* 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;
}
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ /* ...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;
}
}
-#endif
}
if (DEBUG)
bb_error_msg("sending file '%s' content-type: %s",
url, found_mime_type);
- f = open(url, O_RDONLY);
- if (f < 0) {
- if (DEBUG)
- bb_perror_msg("cannot 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 ENABLE_FEATURE_HTTPD_RANGES
- if (what == SEND_BODY)
- range_start = 0; /* err pages and ranges don't mix */
+ 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) {
- if (!range_end) {
+ if (range_start >= 0) {
+ if (!range_end || range_end > file_size - 1) {
range_end = file_size - 1;
}
if (range_end < range_start
- || lseek(f, range_start, SEEK_SET) != range_start
+ || lseek(fd, range_start, SEEK_SET) != range_start
) {
- lseek(f, 0, SEEK_SET);
- range_start = 0;
+ lseek(fd, 0, SEEK_SET);
+ range_start = -1;
} else {
range_len = range_end - range_start + 1;
send_headers(HTTP_PARTIAL_CONTENT);
}
}
#endif
-
if (what & SEND_HEADERS)
send_headers(HTTP_OK);
-
-#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
- offset = range_start;
- do {
- /* sz is rounded down to 64k */
- ssize_t sz = MAXINT(ssize_t) - 0xffff;
- USE_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
- count = sendfile(1, f, &offset, sz);
- if (count < 0) {
- if (offset == range_start)
- goto fallback;
- goto fin;
+#if ENABLE_FEATURE_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();
}
- USE_FEATURE_HTTPD_RANGES(range_len -= sz;)
- } while (count > 0 && range_len);
- log_and_exit();
-
- fallback:
+ }
#endif
- while ((count = safe_read(f, iobuf, IOBUF_SIZE)) > 0) {
+ while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
ssize_t n;
- USE_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
+ IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
n = full_write(STDOUT_FILENO, iobuf, count);
if (count != n)
break;
- USE_FEATURE_HTTPD_RANGES(range_len -= count;)
- if (!range_len)
+ IF_FEATURE_HTTPD_RANGES(range_len -= count;)
+ if (range_len == 0)
break;
}
-#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
- fin:
-#endif
- if (count < 0 && verbose > 1)
- bb_perror_msg("error");
+ if (count < 0) {
+ IF_FEATURE_USE_SENDFILE(fin:)
+ if (verbose > 1)
+ bb_perror_msg("error");
+ }
log_and_exit();
}
-static int checkPermIP(void)
+static void if_ip_denied_send_HTTP_FORBIDDEN_and_exit(unsigned remote_ip)
{
Htaccess_IP *cur;
- /* This could stand some work */
for (cur = ip_a_d; cur; cur = cur->next) {
#if DEBUG
fprintf(stderr,
(unsigned char)(cur->mask)
);
#endif
- if ((rmt_ip & cur->mask) == cur->ip)
- return cur->allow_deny == 'A'; /* Allow/Deny */
+ if ((remote_ip & cur->mask) == cur->ip) {
+ if (cur->allow_deny == 'A')
+ return;
+ send_headers_and_exit(HTTP_FORBIDDEN);
+ }
}
- /* if unconfigured, return 1 - access from all */
- return !flg_deny_all;
+ if (flg_deny_all) /* depends on whether we saw "D:*" */
+ send_headers_and_exit(HTTP_FORBIDDEN);
}
#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
+
/*
- * 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
+ * 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.
- * request User information to validate.
+ * path The file path
+ * user_and_passwd "user:passwd" to validate
*
- * Returns 1 if request is OK.
+ * Returns 1 if user_and_passwd is OK.
*/
-static int checkPerm(const char *path, const char *request)
+static int check_user_passwd(const char *path, char *user_and_passwd)
{
Htaccess *cur;
- const char *p;
- const char *p0;
-
const char *prev = NULL;
- /* This could stand some work */
for (cur = g_auth; cur; cur = cur->next) {
- size_t l;
+ const char *dir_prefix;
+ size_t len;
+ int r;
- 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);
+ dir_prefix = cur->before_colon;
- 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;
- }
+ /* WHY? */
+ /* If already saw a match, don't accept other different matches */
+ if (prev && strcmp(prev, dir_prefix) != 0)
+ continue;
- if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
- char *pp;
+ 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;
+ }
- if (strncmp(p, request, u - request) != 0) {
- /* user doesn't match */
- 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);
}
- pp = strchr(p, ':');
- if (pp && pp[1] == '$' && pp[2] == '1'
- && pp[3] == '$' && pp[4]
- ) {
- char *encrypted = pw_encrypt(u+1, ++pp, 1);
- int r = strcmp(encrypted, pp);
- free(encrypted);
- if (r == 0)
- goto set_remoteuser_var; /* Ok */
- /* unauthorized */
+ *colon_after_user = ':';
+ goto end_check_passwd;
+# else
+# if ENABLE_FEATURE_SHADOWPASSWDS
+ /* Using _r function to avoid pulling in static buffers */
+ struct spwd spw;
+# endif
+ struct passwd *pw;
+
+ *colon_after_user = '\0';
+ pw = getpwnam(user_and_passwd);
+ *colon_after_user = ':';
+ if (!pw || !pw->pw_passwd)
continue;
+ passwd = pw->pw_passwd;
+# if ENABLE_FEATURE_SHADOWPASSWDS
+ if ((passwd[0] == 'x' || passwd[0] == '*') && !passwd[1]) {
+ /* getspnam_r may return 0 yet set result to NULL.
+ * At least glibc 2.4 does this. Be extra paranoid here. */
+ struct spwd *result = NULL;
+ r = getspnam_r(pw->pw_name, &spw, sp_buf, sizeof(sp_buf), &result);
+ if (r == 0 && result)
+ passwd = result->sp_pwdp;
}
+# endif
+ /* In this case, passwd is ALWAYS encrypted:
+ * it came from /etc/passwd or /etc/shadow!
+ */
+ goto check_encrypted;
+# endif /* ENABLE_PAM */
}
-
- if (strcmp(p, request) == 0) {
- set_remoteuser_var:
- remoteuser = xstrndup(request, u - request);
- return 1; /* Ok */
+ /* Else: passwd is from httpd.conf, it is either plaintext or encrypted */
+
+ if (passwd[0] == '$' && 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);
}
- /* unauthorized */
+ 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 */
- return prev == NULL;
+ /* 0(bad) if prev is set: matches were found but passwd was wrong */
+ return (prev == NULL);
}
#endif /* FEATURE_HTTPD_BASIC_AUTH */
{
Htaccess_Proxy *p;
for (p = proxy; p; p = p->next) {
- if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
+ if (is_prefixed_with(url, p->url_from))
return p;
}
return NULL;
/*
* Handle timeouts
*/
-static void exit_on_signal(int sig) ATTRIBUTE_NORETURN;
-static void exit_on_signal(int sig ATTRIBUTE_UNUSED)
+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) ATTRIBUTE_NORETURN;
+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";
char *urlcopy;
char *urlp;
char *tptr;
- int ip_allowed;
+ unsigned remote_ip;
+#if ENABLE_FEATURE_HTTPD_CGI
+ unsigned total_headers_len;
+#endif
#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;
+ enum CGI_type cgi_type = CGI_NONE;
#elif ENABLE_FEATURE_HTTPD_PROXY
#define prequest request_GET
unsigned long length = 0;
-#endif
- 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
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- int credentials = -1; /* if not required this is Ok */
+ smallint authorized = -1;
#endif
+ char http_major_version;
+ char *HTTP_slash;
/* Allocation of iobuf is postponed until now
* (IOW, server process doesn't need to waste 8k) */
iobuf = xmalloc(IOBUF_SIZE);
- rmt_ip = 0;
+ remote_ip = 0;
if (fromAddr->u.sa.sa_family == AF_INET) {
- rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
+ remote_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]);
+ remote_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?) */
if (verbose > 2)
bb_error_msg("connected");
}
+ if_ip_denied_send_HTTP_FORBIDDEN_and_exit(remote_ip);
- /* Install timeout handler */
- signal_no_SA_RESTART_empty_mask(SIGALRM, exit_on_signal);
- alarm(HEADER_READ_TIMEOUT);
+ /* 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");
+ // rfc2616: method and URI is separated by exactly one space
+ //urlp = strpbrk(iobuf, " \t"); - no, tab isn't allowed
+ urlp = strchr(iobuf, ' ');
if (urlp == NULL)
send_headers_and_exit(HTTP_BAD_REQUEST);
*urlp++ = '\0';
if (strcasecmp(iobuf, request_GET) != 0)
send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
#endif
- urlp = skip_whitespace(urlp);
+ // rfc2616: method and URI is separated by exactly one space
+ //urlp = skip_whitespace(urlp); - should not be necessary
if (urlp[0] != '/')
send_headers_and_exit(HTTP_BAD_REQUEST);
/* Find end of URL and parse HTTP version, if any */
- http_major_version = '0';
- USE_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
- tptr = strchrnul(urlp, ' ');
+//TODO: maybe just reject all queries which have no " HTTP/xyz" suffix?
+//Then 'http_major_version' can be deleted
+ http_major_version = ('0' - 1); /* "less than 0th" version */
+ HTTP_slash = strchrnul(urlp, ' ');
/* Is it " HTTP/"? */
- if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
- http_major_version = tptr[6];
- USE_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
+ if (HTTP_slash[0] && strncmp(HTTP_slash + 1, HTTP_200, 5) == 0) {
+ http_major_version = HTTP_slash[6];
+ *HTTP_slash++ = '\0';
}
- *tptr = '\0';
/* Copy URL from after "GET "/"POST " to stack-allocated char[] */
- urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
+ urlcopy = alloca((HTTP_slash - 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;
- tptr = strchr(urlcopy, '?');
- if (tptr) {
- *tptr++ = '\0';
- g_query = tptr;
+#if ENABLE_FEATURE_HTTPD_PROXY
+ {
+ int proxy_fd;
+ len_and_sockaddr *lsa;
+ Htaccess_Proxy *proxy_entry = find_proxy_entry(urlcopy);
+
+ if (proxy_entry) {
+ lsa = host2sockaddr(proxy_entry->host_port, 80);
+ if (!lsa)
+ send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
+ proxy_fd = socket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
+ if (proxy_fd < 0)
+ 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);
+ /* Config directive was of the form:
+ * P:/url:[http://]hostname[:port]/new/path
+ * When /urlSFX is requested, reverse proxy it
+ * to http://hostname[:port]/new/pathSFX
+ */
+ fdprintf(proxy_fd, "%s %s%s %s\r\n",
+ prequest, /* "GET" or "POST" */
+ proxy_entry->url_to, /* "/new/path" */
+ urlcopy + strlen(proxy_entry->url_from), /* "SFX" */
+ HTTP_slash /* HTTP/xyz" or "" */
+ );
+ cgi_io_loop_and_exit(proxy_fd, proxy_fd, /*max POST length:*/ INT_MAX);
+ }
}
+#endif
+
+ /* Extract url args if present */
+ g_query = strchr(urlcopy, '?');
+ if (g_query)
+ *g_query++ = '\0';
/* Decode URL escape sequences */
- tptr = decodeString(urlcopy, 0);
+ tptr = percent_decode_in_place(urlcopy, /*strict:*/ 1);
if (tptr == NULL)
send_headers_and_exit(HTTP_BAD_REQUEST);
if (tptr == urlcopy + 1) {
/* Algorithm stolen from libbb bb_simplify_path(),
* but don't strdup, retain trailing slash, protect root */
urlp = tptr = urlcopy;
- do {
+ for (;;) {
if (*urlp == '/') {
/* skip duplicate (or initial) slash */
if (*tptr == '/') {
- continue;
+ goto next_char;
}
if (*tptr == '.') {
- /* skip extra "/./" */
- if (tptr[1] == '/' || !tptr[1]) {
- continue;
- }
- /* "..": be careful */
- if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
- ++tptr;
- if (urlp == urlcopy) /* protect root */
+ if (tptr[1] == '.' && (tptr[2] == '/' || tptr[2] == '\0')) {
+ /* "..": be careful */
+ /* protect root */
+ if (urlp == urlcopy)
send_headers_and_exit(HTTP_BAD_REQUEST);
- while (*--urlp != '/') /* omit previous dir */;
+ /* omit previous dir */
+ while (*--urlp != '/')
continue;
+ /* skip to "./" or ".<NUL>" */
+ tptr++;
+ }
+ if (tptr[1] == '/' || tptr[1] == '\0') {
+ /* skip extra "/./" */
+ goto next_char;
}
}
}
*++urlp = *tptr;
- } while (*++tptr);
- *++urlp = '\0'; /* terminate after last character */
+ if (*tptr == '\0')
+ break;
+ next_char:
+ tptr++;
+ }
/* If URL is a directory, add '/' */
if (urlp[-1] != '/') {
- if (is_directory(urlcopy + 1, 1, &sb)) {
+ if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
found_moved_temporarily = urlcopy;
}
}
bb_error_msg("url:%s", urlcopy);
tptr = urlcopy;
- ip_allowed = checkPermIP();
- while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
+ while ((tptr = strchr(tptr + 1, '/')) != NULL) {
/* have path1/path2 */
*tptr = '\0';
- if (is_directory(urlcopy + 1, 1, &sb)) {
- /* may be having subdir config */
+ if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
+ /* may have subdir config */
parse_conf(urlcopy + 1, SUBDIR_PARSE);
- ip_allowed = checkPermIP();
+ if_ip_denied_send_HTTP_FORBIDDEN_and_exit(remote_ip);
}
*tptr = '/';
}
-#if ENABLE_FEATURE_HTTPD_PROXY
- proxy_entry = find_proxy_entry(urlcopy);
- if (proxy_entry)
- header_buf = header_ptr = xmalloc(IOBUF_SIZE);
+ tptr = urlcopy + 1; /* skip first '/' */
+
+#if ENABLE_FEATURE_HTTPD_CGI
+ if (is_prefixed_with(tptr, "cgi-bin/")) {
+ if (tptr[8] == '\0') {
+ /* protect listing "cgi-bin/" */
+ send_headers_and_exit(HTTP_FORBIDDEN);
+ }
+ cgi_type = CGI_NORMAL;
+ }
#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) {
+ cgi_type = CGI_INTERPRETER;
+ break;
+ }
+ }
+ }
+#endif
+ if (!found_moved_temporarily) {
+ 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) {
+ cgi_type = CGI_INDEX;
+ }
+ }
+#endif
+ urlp[0] = '\0';
+
+#if ENABLE_FEATURE_HTTPD_CGI
+ total_headers_len = 0;
+#endif
if (http_major_version >= '0') {
/* Request was with "... HTTP/nXXX", and n >= 0 */
- /* Read until blank line for HTTP version specified, else parse immediate */
+ /* Read until blank line */
while (1) {
- alarm(HEADER_READ_TIMEOUT);
- if (!get_line())
+ unsigned iobuf_len = get_line();
+ if (!iobuf_len)
break; /* EOF or error or empty line */
+#if ENABLE_FEATURE_HTTPD_CGI
+ /* Prevent unlimited growth of HTTP_xyz envvars */
+ total_headers_len += iobuf_len;
+ if (total_headers_len >= MAX_HTTP_HEADERS_SIZE)
+ send_headers_and_exit(HTTP_ENTITY_TOO_LARGE);
+#endif
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)) {
+ if (STRNCASECMP(iobuf, "Content-Length:") == 0) {
/* extra read only for POST */
if (prequest != request_GET
-#if ENABLE_FEATURE_HTTPD_CGI
+# if ENABLE_FEATURE_HTTPD_CGI
&& prequest != request_HEAD
-#endif
+# endif
) {
- tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
+ 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! */
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));
+ continue;
}
#endif
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
if (STRNCASECMP(iobuf, "Authorization:") == 0) {
/* We only allow Basic credentials.
- * It shows up as "Authorization: Basic <userid:password>" where
- * the userid:password is base64 encoded.
+ * 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)
+ if (STRNCASECMP(tptr, "Basic") == 0) {
+ tptr += sizeof("Basic")-1;
+ /* decodeBase64() skips whitespace itself */
+ decodeBase64(tptr);
+ authorized = check_user_passwd(urlcopy, tptr);
continue;
- tptr += sizeof("Basic")-1;
- /* decodeBase64() skips whitespace itself */
- decodeBase64(tptr);
- credentials = checkPerm(urlcopy, tptr);
+ }
}
-#endif /* FEATURE_HTTPD_BASIC_AUTH */
+#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) {
+ if (is_prefixed_with(s, "bytes=")) {
s += sizeof("bytes=")-1;
range_start = BB_STRTOOFF(s, &s, 10);
if (s[0] != '-' || range_start < 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 = 0;
+ range_start = -1;
}
}
+ continue;
+ }
+#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;
+ //}
+ }
+ continue;
+ }
+#endif
+#if ENABLE_FEATURE_HTTPD_CGI
+ if (cgi_type != CGI_NONE) {
+ bool ct = (STRNCASECMP(iobuf, "Content-Type:") == 0);
+ char *cp;
+ char *colon = strchr(iobuf, ':');
+
+ if (!colon)
+ continue;
+ cp = iobuf;
+ while (cp < colon) {
+ /* a-z => A-Z, not-alnum => _ */
+ char c = (*cp & ~0x20); /* toupper for A-Za-z, undef for others */
+ if ((unsigned)(c - 'A') <= ('Z' - 'A')) {
+ *cp++ = c;
+ continue;
+ }
+ if (!isdigit(*cp))
+ *cp = '_';
+ cp++;
+ }
+ /* "Content-Type:" gets no HTTP_ prefix, all others do */
+ cp = xasprintf(ct ? "HTTP_%.*s=%s" + 5 : "HTTP_%.*s=%s",
+ (int)(colon - iobuf), iobuf,
+ skip_whitespace(colon + 1)
+ );
+ putenv(cp);
}
#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 == 0) {
- /* protect listing [/path]/httpd_conf or IP deny */
+ if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0) {
+ /* protect listing [/path]/httpd.conf or IP deny */
send_headers_and_exit(HTTP_FORBIDDEN);
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (credentials <= 0 && checkPerm(urlcopy, ":") == 0) {
+ /* 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 needs to have two disctinct fds */
- cgi_io_loop_and_exit(proxy_fd, dup(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, prequest, length, cookie, content_type);
- }
-#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, prequest, length, cookie, content_type);
- }
- }
- }
+ if (cgi_type != CGI_NONE) {
+ send_cgi_and_exit(
+ (cgi_type == CGI_INDEX) ? "/cgi-bin/index.cgi"
+ /*CGI_NORMAL or CGI_INTERPRETER*/ : urlcopy,
+ urlcopy, prequest, length
+ );
}
#endif
- if (prequest != request_GET && prequest != request_HEAD) {
- send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
- }
-#endif /* FEATURE_HTTPD_CGI */
- if (urlp[-1] == '/')
+ if (urlp[-1] == '/') {
strcpy(urlp, index_page);
- if (stat(tptr, &sb) == 0) {
- 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';
- g_query = urlcopy;
- send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
- }
+ if (prequest != request_GET && prequest != request_HEAD) {
+ /* POST for files does not make sense */
+ send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
}
-#endif
- /* else {
- * fall through to send_file, it errors out if open fails
- * }
- */
-
send_file_and_exit(tptr,
-#if ENABLE_FEATURE_HTTPD_CGI
(prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
+ );
#else
- SEND_HEADERS_AND_BODY
+ send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
#endif
- );
}
/*
* Never returns.
*/
#if BB_MMU
-static void mini_httpd(int server_socket) ATTRIBUTE_NORETURN;
+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().
/* 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));
+ setsockopt_keepalive(n);
if (fork() == 0) {
/* child */
-#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
/* Do not reload config on HUP */
signal(SIGHUP, SIG_IGN);
-#endif
close(server_socket);
xmove_fd(n, 0);
xdup2(0, 1);
/* never reached */
}
#else
-static void mini_httpd_nommu(int server_socket, int argc, char **argv) ATTRIBUTE_NORETURN;
+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];
*/
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);
-
+ n = accept(server_socket, NULL, NULL);
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));
+ setsockopt_keepalive(n);
if (vfork() == 0) {
/* child */
-#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
/* Do not reload config on HUP */
signal(SIGHUP, SIG_IGN);
-#endif
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) */
* Process a HTTP connection on stdin/out.
* Never returns.
*/
-static void mini_httpd_inetd(void) ATTRIBUTE_NORETURN;
+static void mini_httpd_inetd(void) NORETURN;
static void mini_httpd_inetd(void)
{
len_and_sockaddr fromAddr;
handle_incoming_and_exit(&fromAddr);
}
-#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
-static void sighup_handler(int sig)
+static void sighup_handler(int sig UNUSED_PARAM)
{
- parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
-
- signal_SA_RESTART_empty_mask(SIGHUP, sighup_handler);
+ int sv = errno;
+ parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
+ errno = sv;
}
-#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 ,)
+ 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,
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_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,
int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int httpd_main(int argc UNUSED_PARAM, char **argv)
{
int server_socket = server_socket; /* for gcc */
unsigned opt;
char *url_for_decode;
- USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
- 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_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();
#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:"
- 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:ifv",
- &configFile, &url_for_decode, &home_httpd
- USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
- USE_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
- USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
- USE_FEATURE_HTTPD_SETUID(, &s_ugid)
+ 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"
+ "\0"
+ /* -v counts, -i implies -f */
+ "vv:if",
+ &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(decodeString(url_for_decode, 1), stdout);
+ fputs(percent_decode_in_place(url_for_decode, /*strict:*/ 0), stdout);
return 0;
}
#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
#endif
#if ENABLE_FEATURE_HTTPD_AUTH_MD5
if (opt & OPT_MD5) {
- puts(pw_encrypt(pass, "$1$", 1));
+ 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) {
- if (!get_uidgid(&ugid, s_ugid, 1))
- bb_error_msg_and_die("unknown user[:group] "
- "name '%s'", s_ugid);
+ xget_uidgid(&ugid, s_ugid);
}
#endif
#endif
}
-#if 0 /*was #if ENABLE_FEATURE_HTTPD_CGI*/
+#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
}
#endif
-#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+ parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
if (!(opt & OPT_INETD))
- sighup_handler(0);
-#endif
- parse_conf(default_path_httpd_conf, FIRST_PARSE);
+ signal(SIGHUP, sighup_handler);
xfunc_error_retval = 0;
if (opt & OPT_INETD)
- mini_httpd_inetd();
+ mini_httpd_inetd(); /* never returns */
#if BB_MMU
if (!(opt & OPT_FOREGROUND))
bb_daemonize(0); /* don't change current directory */
projects / oweals / busybox.git / blobdiff