* 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 applet 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:
* /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
* /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
* /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
+ * /adm:root:* # or user root, pwd from /etc/passwd on urls starting with /adm/
+ * /wiki:*:* # or any user from /etc/passwd with according pwd on urls starting with /wiki/
* .au:audio/basic # additional mime type for audio.au files
* *.php:/path/php # run xxx.php through an interpreter
*
* 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
* server exits with an error.
*
*/
+ /* TODO: use TCP_CORK, parse_config() */
+
+//usage:#define httpd_trivial_usage
+//usage: "[-ifv[v]]"
+//usage: " [-c CONFFILE]"
+//usage: " [-p [IP:]PORT]"
+//usage: IF_FEATURE_HTTPD_SETUID(" [-u USER[:GRP]]")
+//usage: IF_FEATURE_HTTPD_BASIC_AUTH(" [-r REALM]")
+//usage: " [-h HOME]\n"
+//usage: "or httpd -d/-e" IF_FEATURE_HTTPD_AUTH_MD5("/-m") " STRING"
+//usage:#define httpd_full_usage "\n\n"
+//usage: "Listen for incoming HTTP requests\n"
+//usage: "\n -i Inetd mode"
+//usage: "\n -f Don't daemonize"
+//usage: "\n -v[v] Verbose"
+//usage: "\n -p [IP:]PORT Bind to IP:PORT (default *:80)"
+//usage: IF_FEATURE_HTTPD_SETUID(
+//usage: "\n -u USER[:GRP] Set uid/gid after binding to port")
+//usage: IF_FEATURE_HTTPD_BASIC_AUTH(
+//usage: "\n -r REALM Authentication Realm for Basic Authentication")
+//usage: "\n -h HOME Home directory (default .)"
+//usage: "\n -c FILE Configuration file (default {/etc,HOME}/httpd.conf)"
+//usage: IF_FEATURE_HTTPD_AUTH_MD5(
+//usage: "\n -m STRING MD5 crypt STRING")
+//usage: "\n -e STRING HTML encode STRING"
+//usage: "\n -d STRING URL decode STRING"
#include "libbb.h"
+#if ENABLE_PAM
+/* PAM may include <locale.h>. We may need to undefine bbox's stub define: */
+# undef setlocale
+/* For some obscure reason, PAM is not in pam/xxx, but in security/xxx.
+ * Apparently they like to confuse people. */
+# include <security/pam_appl.h>
+# include <security/pam_misc.h>
+#endif
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
# include <sys/sendfile.h>
#endif
-
-//#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
#if PIPE_BUF >= IOBUF_SIZE
# error "PIPE_BUF >= IOBUF_SIZE"
#endif
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;
HTTP_PAYMENT_REQUIRED = 402,
HTTP_BAD_GATEWAY = 502,
HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
- HTTP_RESPONSE_SETSIZE = 0xffffffff
#endif
};
#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 */
+ unsigned rmt_ip; /* used for IP-based allow/deny rules */
time_t last_mod;
char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
const char *bind_addr_or_port;
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
Htaccess *script_i; /* config script interpreters */
#endif
- char *iobuf; /* [IOBUF_SIZE] */
+ char *iobuf; /* [IOBUF_SIZE] */
#define hdr_buf bb_common_bufsiz1
char *hdr_ptr;
int hdr_cnt;
#if ENABLE_FEATURE_HTTPD_PROXY
Htaccess_Proxy *proxy;
#endif
+#if ENABLE_FEATURE_HTTPD_GZIP
+ /* client can handle gzip / we are going to send gzip */
+ smallint content_gzip;
+#endif
};
#define G (*ptr_to_globals)
#define verbose (G.verbose )
#define range_len (G.range_len )
#else
enum {
- range_start = 0,
+ range_start = -1,
range_end = MAXINT(off_t) - 1,
range_len = MAXINT(off_t),
};
#define hdr_cnt (G.hdr_cnt )
#define http_error_page (G.http_error_page )
#define proxy (G.proxy )
+#if ENABLE_FEATURE_HTTPD_GZIP
+# define content_gzip (G.content_gzip )
+#else
+# define content_gzip 0
+#endif
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
+ IF_FEATURE_HTTPD_RANGES(range_start = -1;) \
bind_addr_or_port = "80"; \
- index_page = "index.html"; \
+ index_page = index_html; \
file_size = -1; \
} while (0)
while (fgets(buf, sizeof(buf), f) != NULL) {
unsigned strlen_buf;
unsigned char ch;
- char *after_colon = NULL;
+ char *after_colon;
{ /* remove all whitespace, and # comments */
char *p, *p0;
- p = p0 = buf;
- while ((ch = *p0++) != '\0' && ch != '#') {
- if (!isspace(ch)) {
+ 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;
- if (ch == ':' && after_colon == NULL)
- after_colon = p;
}
+ ch = *++p0;
}
*p = '\0';
strlen_buf = p - buf;
+ if (strlen_buf == 0)
+ continue; /* empty line */
}
- /* empty or strange line? */
- if (after_colon == NULL || *after_colon == '\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;
}
unsigned file_len;
/* note: path is "" unless we are in SUBDIR parse,
- * otherwise it always starts with "/" */
+ * otherwise it does NOT start with "/" */
cur = xzalloc(sizeof(*cur) /* includes space for NUL */
- + strlen(path)
+ + 1 + strlen(path)
+ strlen_buf
);
/* form "/path/file" */
- sprintf(cur->before_colon, "%s%.*s",
+ sprintf(cur->before_colon, "/%s%.*s",
path,
- after_colon - buf - 1, /* includes "/", but not ":" */
+ (int) (after_colon - buf - 1), /* includes "/", but not ":" */
buf);
/* canonicalize it */
p = bb_simplify_abs_path_inplace(cur->before_colon);
/* the line is not recognized */
config_error:
bb_error_msg("config error '%s' in '%s'", buf, filename);
- } /* while (fgets) */
+ } /* while (fgets) */
- fclose(f);
+ 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;
*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
/*
strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
#if ENABLE_FEATURE_HTTPD_RANGES
if (responseNum == HTTP_PARTIAL_CONTENT) {
- len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"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);
#if ENABLE_FEATURE_HTTPD_RANGES
"Accept-Ranges: bytes\r\n"
#endif
- "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
+ "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
tmp_str,
- "Content-length:",
+ content_gzip ? "Transfer-length:" : "Content-length:",
file_size
);
}
+
+ if (content_gzip)
+ len += sprintf(iobuf + len, "Content-Encoding: gzip\r\n");
+
iobuf[len++] = '\r';
iobuf[len++] = '\n';
if (infoString) {
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();
}
/* 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) {
}
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
*
* Parameters:
* const char *url The requested URL (with leading /).
+ * const char *orig_uri The original URI before rewriting (if any)
* int post_len Length of the POST body.
* const char *cookie For set HTTP_COOKIE.
* const char *content_type For set CONTENT_TYPE.
*/
static void send_cgi_and_exit(
const char *url,
+ const char *orig_uri,
const char *request,
int post_len,
const char *cookie,
const char *content_type) NORETURN;
static void send_cgi_and_exit(
const char *url,
+ const char *orig_uri,
const char *request,
int post_len,
const char *cookie,
{
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 */
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) */
*/
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 fd;
- const char *const *table;
- const char *try_suffix;
ssize_t count;
- fd = open(url, O_RDONLY);
+ 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);
send_headers_and_exit(HTTP_NOT_FOUND);
log_and_exit();
}
-
- if (DEBUG)
- bb_error_msg("sending file '%s' content-type: %s",
- url, found_mime_type);
-
/* If you want to know about EPIPE below
* (happens if you abort downloads from local httpd): */
signal(SIGPIPE, SIG_IGN);
- suffix = strrchr(url, '.');
-
- /* If not found, set default as "application/octet-stream"; */
+ /* If not found, default is "application/octet-stream" */
found_mime_type = "application/octet-stream";
+ suffix = strrchr(url, '.');
if (suffix) {
+ static const char suffixTable[] ALIGN1 =
+ /* Shorter suffix must be first:
+ * ".html.htm" will fail for ".htm"
+ */
+ ".txt.h.c.cc.cpp\0" "text/plain\0"
+ /* .htm line must be after .h line */
+ ".htm.html\0" "text/html\0"
+ ".jpg.jpeg\0" "image/jpeg\0"
+ ".gif\0" "image/gif\0"
+ ".png\0" "image/png\0"
+ /* .css line must be after .c line */
+ ".css\0" "text/css\0"
+ ".wav\0" "audio/wav\0"
+ ".avi\0" "video/x-msvideo\0"
+ ".qt.mov\0" "video/quicktime\0"
+ ".mpe.mpeg\0" "video/mpeg\0"
+ ".mid.midi\0" "audio/midi\0"
+ ".mp3\0" "audio/mpeg\0"
+#if 0 /* unpopular */
+ ".au\0" "audio/basic\0"
+ ".pac\0" "application/x-ns-proxy-autoconfig\0"
+ ".vrml.wrl\0" "model/vrml\0"
+#endif
+ /* compiler adds another "\0" here */
+ ;
Htaccess *cur;
- 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;
}
+ /* ...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;
}
}
}
+
+ if (DEBUG)
+ bb_error_msg("sending file '%s' content-type: %s",
+ url, found_mime_type);
+
#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(fd, range_start, SEEK_SET) != range_start
) {
lseek(fd, 0, SEEK_SET);
- range_start = 0;
+ range_start = -1;
} else {
range_len = range_end - range_start + 1;
send_headers(HTTP_PARTIAL_CONTENT);
break; /* fall back to read/write loop */
goto fin;
}
- IF_FEATURE_HTTPD_RANGES(range_len -= sz;)
+ IF_FEATURE_HTTPD_RANGES(range_len -= count;)
if (count == 0 || range_len == 0)
log_and_exit();
}
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+
+# if ENABLE_PAM
+struct pam_userinfo {
+ const char *name;
+ const char *pw;
+};
+
+static int pam_talker(int num_msg,
+ const struct pam_message **msg,
+ struct pam_response **resp,
+ void *appdata_ptr)
+{
+ int i;
+ struct pam_userinfo *userinfo = (struct pam_userinfo *) appdata_ptr;
+ struct pam_response *response;
+
+ if (!resp || !msg || !userinfo)
+ return PAM_CONV_ERR;
+
+ /* allocate memory to store response */
+ response = xzalloc(num_msg * sizeof(*response));
+
+ /* copy values */
+ for (i = 0; i < num_msg; i++) {
+ const char *s;
+
+ switch (msg[i]->msg_style) {
+ case PAM_PROMPT_ECHO_ON:
+ s = userinfo->name;
+ break;
+ case PAM_PROMPT_ECHO_OFF:
+ s = userinfo->pw;
+ break;
+ case PAM_ERROR_MSG:
+ case PAM_TEXT_INFO:
+ s = "";
+ break;
+ default:
+ free(response);
+ return PAM_CONV_ERR;
+ }
+ response[i].resp = xstrdup(s);
+ if (PAM_SUCCESS != 0)
+ response[i].resp_retcode = PAM_SUCCESS;
+ }
+ *resp = response;
+ return PAM_SUCCESS;
+}
+# endif
+
/*
* Config file entries are of the form "/<path>:<user>:<passwd>".
* If config file has no prefix match for path, access is allowed.
*
* Returns 1 if user_and_passwd is OK.
*/
-static int check_user_passwd(const char *path, const char *user_and_passwd)
+static int check_user_passwd(const char *path, char *user_and_passwd)
{
Htaccess *cur;
const char *prev = NULL;
for (cur = g_auth; cur; cur = cur->next) {
const char *dir_prefix;
size_t len;
+ int r;
dir_prefix = cur->before_colon;
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'))
+ || (path[len] != '/' && path[len] != '\0')
+ )
) {
continue;
}
prev = dir_prefix;
if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
- char *md5_passwd;
-
- md5_passwd = strchr(cur->after_colon, ':');
- if (md5_passwd && md5_passwd[1] == '$' && md5_passwd[2] == '1'
- && md5_passwd[3] == '$' && md5_passwd[4]
+ 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
) {
- char *encrypted;
- int r, user_len_p1;
-
- md5_passwd++;
- user_len_p1 = md5_passwd - cur->after_colon;
- /* comparing "user:" */
- if (strncmp(cur->after_colon, user_and_passwd, user_len_p1) != 0) {
+ continue;
+ }
+ /* this cfg entry is '*' or matches username from peer */
+
+ passwd = strchr(cur->after_colon, ':');
+ if (!passwd)
+ goto bad_input;
+ passwd++;
+ if (passwd[0] == '*') {
+# if ENABLE_PAM
+ struct pam_userinfo userinfo;
+ struct pam_conv conv_info = { &pam_talker, (void *) &userinfo };
+ pam_handle_t *pamh;
+
+ *colon_after_user = '\0';
+ userinfo.name = user_and_passwd;
+ userinfo.pw = colon_after_user + 1;
+ r = pam_start("httpd", user_and_passwd, &conv_info, &pamh) != PAM_SUCCESS;
+ if (r == 0) {
+ r = pam_authenticate(pamh, PAM_DISALLOW_NULL_AUTHTOK) != PAM_SUCCESS
+ || pam_acct_mgmt(pamh, PAM_DISALLOW_NULL_AUTHTOK) != PAM_SUCCESS
+ ;
+ pam_end(pamh, PAM_SUCCESS);
+ }
+ *colon_after_user = ':';
+ goto end_check_passwd;
+# else
+# if ENABLE_FEATURE_SHADOWPASSWDS
+ /* Using _r function to avoid pulling in static buffers */
+ struct spwd spw;
+# endif
+ struct passwd *pw;
+
+ *colon_after_user = '\0';
+ pw = getpwnam(user_and_passwd);
+ *colon_after_user = ':';
+ if (!pw || !pw->pw_passwd)
continue;
+ passwd = pw->pw_passwd;
+# if ENABLE_FEATURE_SHADOWPASSWDS
+ if ((passwd[0] == 'x' || passwd[0] == '*') && !passwd[1]) {
+ /* getspnam_r may return 0 yet set result to NULL.
+ * At least glibc 2.4 does this. Be extra paranoid here. */
+ struct spwd *result = NULL;
+ r = getspnam_r(pw->pw_name, &spw, sp_buf, sizeof(sp_buf), &result);
+ if (r == 0 && result)
+ passwd = result->sp_pwdp;
}
+# endif
+ /* In this case, passwd is ALWAYS encrypted:
+ * it came from /etc/passwd or /etc/shadow!
+ */
+ goto check_encrypted;
+# endif /* ENABLE_PAM */
+ }
+ /* Else: passwd is from httpd.conf, it is either plaintext or encrypted */
+ if (passwd[0] == '$' && isdigit(passwd[1])) {
+ char *encrypted;
+# if !ENABLE_PAM
+ check_encrypted:
+# endif
+ /* encrypt pwd from peer and check match with local one */
encrypted = pw_encrypt(
- user_and_passwd + user_len_p1 /* cleartext pwd from user */,
- md5_passwd /*salt */, 1 /* cleanup */);
- r = strcmp(encrypted, md5_passwd);
+ /* pwd (from peer): */ colon_after_user + 1,
+ /* salt: */ passwd,
+ /* cleanup: */ 0
+ );
+ r = strcmp(encrypted, passwd);
free(encrypted);
- if (r == 0)
- goto set_remoteuser_var; /* Ok */
- continue;
+ } else {
+ /* local passwd is from httpd.conf and it's plaintext */
+ r = strcmp(colon_after_user + 1, passwd);
}
+ goto end_check_passwd;
}
-
+ bad_input:
/* Comparing plaintext "user:pass" in one go */
- if (strcmp(cur->after_colon, user_and_passwd) == 0) {
- set_remoteuser_var:
+ 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);
+ strchrnul(user_and_passwd, ':') - user_and_passwd
+ );
return 1; /* Ok */
}
} /* for */
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);
/* NB: urlcopy ptr is never changed after this */
/* Extract url args if present */
- g_query = NULL;
+ /* g_query = NULL; - already is */
tptr = strchr(urlcopy, '?');
if (tptr) {
*tptr++ = '\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 (*urlp == '\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;
}
}
while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
/* have path1/path2 */
*tptr = '\0';
- if (is_directory(urlcopy + 1, 1, &sb)) {
+ if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
/* may have subdir config */
parse_conf(urlcopy + 1, SUBDIR_PARSE);
ip_allowed = checkPermIP();
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) {
if (!get_line())
break; /* EOF or error or empty line */
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);
if (!tptr[0])
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;
}
}
}
#endif
+#if ENABLE_FEATURE_HTTPD_GZIP
+ if (STRNCASECMP(iobuf, "Accept-Encoding:") == 0) {
+ /* Note: we do not support "gzip;q=0"
+ * method of _disabling_ gzip
+ * delivery. No one uses that, though */
+ const char *s = strstr(iobuf, "gzip");
+ if (s) {
+ // want more thorough checks?
+ //if (s[-1] == ' '
+ // || s[-1] == ','
+ // || s[-1] == ':'
+ //) {
+ content_gzip = 1;
+ //}
+ }
+ }
+#endif
} /* while extra header reading */
}
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- /* Case: no "Authorization:" was seen, but page does require passwd.
+ /* Case: no "Authorization:" was seen, but page might require passwd.
* Check that with dummy user:pass */
if (authorized < 0)
- authorized = check_user_passwd(urlcopy, ":");
+ authorized = check_user_passwd(urlcopy, (char *) "");
if (!authorized)
send_headers_and_exit(HTTP_UNAUTHORIZED);
#endif
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);
+ cgi_io_loop_and_exit(proxy_fd, proxy_fd, length);
}
#endif
/* protect listing "cgi-bin/" */
send_headers_and_exit(HTTP_FORBIDDEN);
}
- send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
+ send_cgi_and_exit(urlcopy, urlcopy, prequest, length, cookie, content_type);
}
+#endif
+
+ if (urlp[-1] == '/') {
+ /* When index_page string is appended to <dir>/ URL, it overwrites
+ * the query string. If we fall back to call /cgi-bin/index.cgi,
+ * query string would be lost and not available to the CGI.
+ * Work around it by making a deep copy.
+ */
+ if (ENABLE_FEATURE_HTTPD_CGI)
+ g_query = xstrdup(g_query); /* ok for NULL too */
+ strcpy(urlp, index_page);
+ }
+ if (stat(tptr, &sb) == 0) {
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
- {
char *suffix = strrchr(tptr, '.');
if (suffix) {
Htaccess *cur;
for (cur = script_i; cur; cur = cur->next) {
if (strcmp(cur->before_colon + 1, suffix) == 0) {
- send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
+ send_cgi_and_exit(urlcopy, urlcopy, prequest, length, cookie, content_type);
}
}
}
- }
#endif
- if (prequest != request_GET && prequest != request_HEAD) {
- send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
- }
-#endif /* FEATURE_HTTPD_CGI */
-
- if (urlp[-1] == '/')
- strcpy(urlp, index_page);
- if (stat(tptr, &sb) == 0) {
file_size = sb.st_size;
last_mod = sb.st_mtime;
}
/* 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);
+ urlp[0] = '\0'; /* remove index_page */
+ send_cgi_and_exit("/cgi-bin/index.cgi", urlcopy, prequest, length, cookie, content_type);
}
}
-#endif
- /* else {
- * fall through to send_file, it errors out if open fails
- * }
- */
+ /* else fall through to send_file, it errors out if open fails: */
+ if (prequest != request_GET && prequest != request_HEAD) {
+ /* POST for files does not make sense */
+ send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
+ }
send_file_and_exit(tptr,
-#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
- );
}
/*
/* 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));
/* 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));
/* 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) */
, &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
projects / platform / upstream / busybox.git / blobdiff