* 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 a url arg decoder and html text encoder
* as follows:
* foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
* bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
* A:127.0.0.1 # Allow local loopback connections
* D:* # Deny from other IP connections
* E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
+ * I:index.html # Show index.html when a directory is requested
*
* P:/url:[http://]hostname[:port]/new/path
* # When /urlXXXXXX is requested, reverse proxy
* .au:audio/basic # additional mime type for audio.au files
* *.php:/path/php # running cgi.php scripts through an interpreter
*
- * A/D may be as a/d or allow/deny - first char case insensitive
- * Deny IP rules take precedence over allow rules.
- *
- *
- * The Deny/Allow IP logic:
- *
- * - Default is to allow all. No addresses are denied unless
- * denied with a D: rule.
- * - Order of Deny/Allow rules is significant
+ * 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
const char *g_query;
const char *configFile;
const char *home_httpd;
+ const char *index_page;
const char *found_mime_type;
const char *found_moved_temporarily;
#define g_query (G.g_query )
#define configFile (G.configFile )
#define home_httpd (G.home_httpd )
+#define index_page (G.index_page )
#define found_mime_type (G.found_mime_type )
#define found_moved_temporarily (G.found_moved_temporarily)
#define last_mod (G.last_mod )
#define http_error_page (G.http_error_page )
#define proxy (G.proxy )
#define INIT_G() do { \
- PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
USE_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
bind_addr_or_port = "80"; \
+ index_page = "index.html"; \
file_size = -1; \
} while (0)
#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
/* Prototypes */
-static void send_file_and_exit(const char *url, int headers) ATTRIBUTE_NORETURN;
+enum {
+ SEND_HEADERS = (1 << 0),
+ SEND_BODY = (1 << 1),
+ SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
+};
+static void send_file_and_exit(const char *url, int what) ATTRIBUTE_NORETURN;
static void free_llist(has_next_ptr **pptr)
{
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
Htaccess *cur;
#endif
- const char *cf = configFile;
+ const char *filename = configFile;
char buf[160];
- char *p0;
- char *c, *p;
+ char *p, *p0;
+ char *after_colon;
Htaccess_IP *pip;
/* discard old rules */
}
#endif
- if (flag == SUBDIR_PARSE || cf == NULL) {
- cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
- sprintf((char *)cf, "%s/%s", path, httpd_conf);
+ 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) {
+ while ((f = fopen(filename, "r")) == NULL) {
if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
/* 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);
+ bb_simple_perror_msg_and_die(filename);
flag = FIND_FROM_HTTPD_ROOT;
- cf = httpd_conf;
+ filename = httpd_conf;
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
#endif
/* This could stand some work */
while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
- c = NULL;
+ after_colon = NULL;
for (p = p0; *p0 != '\0' && *p0 != '#'; p0++) {
if (!isspace(*p0)) {
*p++ = *p0;
- if (*p0 == ':' && c == NULL)
- c = p;
+ if (*p0 == ':' && after_colon == NULL)
+ after_colon = p;
}
}
*p = '\0';
/* test for empty or strange line */
- if (c == NULL || *c == '\0')
+ if (after_colon == NULL || *after_colon == '\0')
continue;
p0 = buf;
- if (*p0 == 'd')
- *p0 = 'D';
- if (*c == '*') {
+ if (*p0 == 'd' || *p0 == 'a')
+ *p0 -= 0x20; /* a/d -> A/D */
+ if (*after_colon == '*') {
if (*p0 == 'D') {
- /* memorize deny all */
+ /* memorize "deny all" */
flg_deny_all = 1;
}
- /* skip default other "word:*" config lines */
+ /* skip assumed "A:*", it is a default anyway */
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;
- }
- pip->allow_deny = *p0;
- if (*p0 == 'D') {
- /* Deny:from_IP move top */
- pip->next = ip_a_d;
+ if (scan_ip_mask(after_colon, &(pip->ip), &(pip->mask))) {
+ /* IP{/mask} syntax error detected, protect all */
+ *p0 = 'D';
+ pip->mask = 0;
+ }
+ pip->allow_deny = *p0;
+ if (*p0 == 'D') {
+ /* Deny:from_IP - prepend */
+ pip->next = ip_a_d;
+ ip_a_d = pip;
+ } else {
+ /* A:from_IP - append (thus D precedes A) */
+ 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') {
- int i;
- /* error status code */
- int status = atoi(++p0);
- /* c already points at the character following ':' in parse loop */
- /* c = strchr(p0, ':'); c++; */
+ unsigned i;
+ int status = atoi(++p0); /* error status code */
if (status < HTTP_CONTINUE) {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
+ bb_error_msg("config error '%s' in '%s'", buf, filename);
continue;
}
-
/* then error page; find matching status */
for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
if (http_response_type[i] == status) {
- http_error_page[i] = concat_path_file((*c == '/') ? NULL : 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;
}
}
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);
+ bb_error_msg("config error '%s' in '%s'", buf, filename);
continue;
}
*host_port++ = '\0';
if (strncmp(host_port, "http://", 7) == 0)
host_port += 7;
if (*host_port == '\0') {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
+ bb_error_msg("config error '%s' in '%s'", buf, filename);
continue;
}
url_to = strchr(host_port, '/');
if (url_to == NULL) {
- bb_error_msg("config error '%s' in '%s'", buf, cf);
+ bb_error_msg("config error '%s' in '%s'", buf, filename);
continue;
}
*url_to = '\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;
+ const char *tp = (flag == SUBDIR_PARSE ? path : "");
+ p0 = xmalloc(strlen(tp) + (after_colon - buf) + 2 + strlen(after_colon));
+ after_colon[-1] = '\0';
+ sprintf(p0, "/%s%s", tp, buf);
+ /* looks like bb_simplify_path... */
+ tp = p = p0;
do {
if (*p == '/') {
- if (*cf == '/') { /* skip duplicate (or initial) slash */
+ if (*tp == '/') { /* skip duplicate (or initial) slash */
continue;
}
- if (*cf == '.') {
- if (cf[1] == '/' || cf[1] == '\0') { /* remove extra '.' */
+ if (*tp == '.') {
+ if (tp[1] == '/' || tp[1] == '\0') { /* remove extra '.' */
continue;
}
- if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == '\0')) {
- ++cf;
+ if ((tp[1] == '.') && (tp[2] == '/' || tp[2] == '\0')) {
+ ++tp;
if (p > p0) {
- while (*--p != '/') /* omit previous dir */;
+ while (*--p != '/') /* omit previous dir */
+ continue;
}
continue;
}
}
}
- *++p = *cf;
- } while (*++cf);
+ *++p = *tp;
+ } while (*++tp);
- if ((p == p0) || (*p != '/')) { /* not a trailing slash */
- ++p; /* so keep last character */
+ if ((p == p0) || (*p != '/')) { /* not a trailing slash */
+ ++p; /* so keep last character */
}
*p = ':';
- strcpy(p + 1, c);
+ strcpy(p + 1, after_colon);
}
#endif
+ if (*p0 == 'I') {
+ index_page = xstrdup(after_colon);
+ 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);
+ strcpy(cur->before_colon, p0);
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (*p0 == '/')
+ if (*p0 == '/') /* was malloced - see above */
free(p0);
#endif
- c = strchr(cf, ':');
- *c++ = '\0';
- cur->after_colon = c;
+ cur->after_colon = strchr(cur->before_colon, ':');
+ *cur->after_colon++ = '\0';
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
- if (*cf == '.') {
- /* config .mime line move top for overwrite previous */
+ if (cur->before_colon[0] == '.') {
+ /* .mime line: prepend to mime_a list */
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 */
+ if (cur->before_colon[0] == '*' && cur->before_colon[1] == '.') {
+ /* script interpreter line: prepend to script_i list */
cur->next = script_i;
script_i = cur;
continue;
}
#endif
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+//TODO: we do not test for leading "/"??
+//also, do we leak cur if BASIC_AUTH is off?
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);
+ size_t l = strlen(cur->before_colon);
Htaccess *hti;
for (hti = prev_hti; hti; hti = hti->next) {
/*
* Given a URL encoded string, convert it to plain ascii.
* Since decoding always makes strings smaller, the decode is done in-place.
- * Thus, callers should strdup() the argument if they do not want the
+ * 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.
*
/* Paranoia. IE said to be buggy. It may send some extra data
* or be confused by us just exiting without SHUT_WR. Oh well. */
shutdown(1, SHUT_WR);
+ /* Why??
+ (this also messes up stdin when user runs httpd -i from terminal)
ndelay_on(0);
- while (read(0, iobuf, IOBUF_SIZE) > 0)
+ while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
continue;
+ */
if (verbose > 2)
bb_error_msg("closed");
const char *infoString = NULL;
const char *mime_type;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
- const char *error_page = 0;
+ const char *error_page = NULL;
#endif
unsigned i;
time_t timer = time(0);
}
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
- if (error_page && !access(error_page, R_OK)) {
+ if (error_page && access(error_page, R_OK) == 0) {
strcat(iobuf, "\r\n");
len += 2;
if (DEBUG)
fprintf(stderr, "headers: '%s'\n", iobuf);
- full_write(1, iobuf, len);
+ full_write(STDOUT_FILENO, iobuf, len);
if (DEBUG)
fprintf(stderr, "writing error page: '%s'\n", error_page);
- return send_file_and_exit(error_page, FALSE);
+ return send_file_and_exit(error_page, SEND_BODY);
}
#endif
}
if (DEBUG)
fprintf(stderr, "headers: '%s'\n", iobuf);
- if (full_write(1, iobuf, len) != len) {
+ if (full_write(STDOUT_FILENO, iobuf, len) != len) {
if (verbose > 1)
bb_perror_msg("error");
log_and_exit();
while (1) {
if (hdr_cnt <= 0) {
- hdr_cnt = safe_read(0, hdr_buf, sizeof(hdr_buf));
+ hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
if (hdr_cnt <= 0)
break;
hdr_ptr = hdr_buf;
count = safe_poll(pfd, 3, -1);
if (count <= 0) {
#if 0
- if (waitpid(pid, &status, WNOHANG) <= 0) {
+ if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
/* Weird. CGI didn't exit and no fd's
* are ready, yet poll returned?! */
continue;
* and there *is* data to read from the peer
* (POSTDATA) */
//count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
- //count = safe_read(0, hdr_buf, count);
- count = safe_read(0, hdr_buf, sizeof(hdr_buf));
+ //count = safe_read(STDIN_FILENO, hdr_buf, count);
+ count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
if (count > 0) {
hdr_cnt = count;
hdr_ptr = hdr_buf;
/* eof (or error) and there was no "HTTP",
* so write it, then write received data */
if (out_cnt) {
- full_write(1, HTTP_200, sizeof(HTTP_200)-1);
- full_write(1, rbuf, out_cnt);
+ full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
+ full_write(STDOUT_FILENO, rbuf, out_cnt);
}
break; /* CGI stdout is closed, exiting */
}
/* "Status" header format is: "Status: 302 Redirected\r\n" */
if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
/* send "HTTP/1.0 " */
- if (full_write(1, HTTP_200, 9) != 9)
+ if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
break;
rbuf += 8; /* skip "Status: " */
count = out_cnt - 8;
/* Did CGI add "HTTP"? */
if (memcmp(rbuf, HTTP_200, 4) != 0) {
/* there is no "HTTP", do it ourself */
- if (full_write(1, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
+ if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
break;
}
/* Commented out:
if (count <= 0)
break; /* eof (or error) */
}
- if (full_write(1, rbuf, count) != count)
+ if (full_write(STDOUT_FILENO, rbuf, count) != count)
break;
if (DEBUG)
fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
const char *cookie,
const char *content_type)
{
- struct { int rd; int wr; } fromCgi; /* CGI -> httpd pipe */
- struct { int rd; int wr; } toCgi; /* httpd -> CGI pipe */
- char *fullpath;
+ struct fd_pair fromCgi; /* CGI -> httpd pipe */
+ struct fd_pair toCgi; /* httpd -> CGI pipe */
char *script;
- char *purl;
int pid;
+ /* Make a copy. NB: caller guarantees:
+ * url[0] == '/', url[1] != '/' */
+ url = xstrdup(url);
+
/*
* We are mucking with environment _first_ and then vfork/exec,
- * this allows us to use vfork safely. Parent don't care about
+ * this allows us to use vfork safely. Parent doesn't care about
* these environment changes anyway.
*/
- /*
- * Find PATH_INFO.
- */
- purl = xstrdup(url);
- script = purl;
+ /* Check for [dirs/]script.cgi/PATH_INFO */
+ script = (char*)url;
while ((script = strchr(script + 1, '/')) != NULL) {
- /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
struct stat sb;
*script = '\0';
- if (!is_directory(purl + 1, 1, &sb)) {
+ if (!is_directory(url + 1, 1, &sb)) {
/* not directory, found script.cgi/PATH_INFO */
*script = '/';
break;
}
- *script = '/'; /* is directory, find next '/' */
+ *script = '/'; /* is directory, find next '/' */
}
- setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
+ setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
setenv1("REQUEST_METHOD", request);
if (g_query) {
- putenv(xasprintf("%s=%s?%s", "REQUEST_URI", purl, g_query));
+ putenv(xasprintf("%s=%s?%s", "REQUEST_URI", url, g_query));
} else {
- setenv1("REQUEST_URI", purl);
+ setenv1("REQUEST_URI", url);
}
if (script != NULL)
*script = '\0'; /* cut off /PATH_INFO */
- /* SCRIPT_FILENAME required by PHP in CGI mode */
- fullpath = concat_path_file(home_httpd, purl);
- setenv1("SCRIPT_FILENAME", fullpath);
+ /* SCRIPT_FILENAME is required by PHP in CGI mode */
+ if (home_httpd[0] == '/') {
+ char *fullpath = concat_path_file(home_httpd, url);
+ setenv1("SCRIPT_FILENAME", fullpath);
+ }
/* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
- setenv1("SCRIPT_NAME", purl);
+ setenv1("SCRIPT_NAME", url);
/* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
* QUERY_STRING: The information which follows the ? in the URL
* which referenced this script. This is the query information.
if (referer)
setenv1("HTTP_REFERER", referer);
- xpipe(&fromCgi.rd);
- xpipe(&toCgi.rd);
+ xpiped_pair(fromCgi);
+ xpiped_pair(toCgi);
pid = vfork();
if (pid < 0) {
if (!pid) {
/* Child process */
+ char *argv[3];
+
xfunc_error_retval = 242;
+ /* NB: close _first_, then move fds! */
+ close(toCgi.wr);
+ close(fromCgi.rd);
xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
- close(fromCgi.rd);
- close(toCgi.wr);
/* User seeing stderr output can be a security problem.
* If CGI really wants that, it can always do dup itself. */
/* dup2(1, 2); */
- /* script must have absolute path */
- script = strrchr(fullpath, '/');
- if (!script)
- goto error_execing_cgi;
- *script = '\0';
- /* chdiring to script's dir */
- if (chdir(fullpath) == 0) {
- char *argv[2];
+ /* Chdiring to script's dir */
+ script = strrchr(url, '/');
+ if (script != url) { /* paranoia */
+ *script = '\0';
+ if (chdir(url + 1) != 0) {
+ bb_perror_msg("chdir %s", url + 1);
+ goto error_execing_cgi;
+ }
+ // not needed: *script = '/';
+ }
+ script++;
+
+ /* set argv[0] to name without path */
+ argv[0] = script;
+ argv[1] = NULL;
+
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
- char *interpr = NULL;
- char *suffix = strrchr(purl, '.');
+ {
+ char *suffix = strrchr(script, '.');
if (suffix) {
Htaccess *cur;
for (cur = script_i; cur; cur = cur->next) {
if (strcmp(cur->before_colon + 1, suffix) == 0) {
- interpr = cur->after_colon;
+ /* found interpreter name */
+ argv[0] = cur->after_colon;
+ argv[1] = script;
+ argv[2] = NULL;
break;
}
}
}
-#endif
- *script = '/';
- /* set argv[0] to name without path */
- argv[0] = (char*)bb_basename(purl);
- argv[1] = NULL;
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
- if (interpr)
- execv(interpr, argv);
- else
-#endif
- execv(fullpath, argv);
}
+#endif
+ /* restore default signal dispositions for CGI process */
+ bb_signals(0
+ | (1 << SIGCHLD)
+ | (1 << SIGPIPE)
+ | (1 << SIGHUP)
+ , SIG_DFL);
+
+ /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
+ * without any dir components and will only match a file
+ * in the current directory */
+ execv(argv[0], argv);
+ if (verbose)
+ bb_perror_msg("exec %s", argv[0]);
error_execing_cgi:
/* send to stdout
* (we are CGI here, our stdout is pumped to the net) */
* Send a file response to a HTTP request, and exit
*
* Parameters:
- * const char *url The requested URL (with leading /).
- * headers Don't send headers before if FALSE.
+ * 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 headers)
+static 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 */
off_t offset;
#endif
+ /* 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 (f < 0) {
if (DEBUG)
bb_perror_msg("cannot open '%s'", url);
- if (headers)
+ /* 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 (!headers)
+ if (what == SEND_BODY)
range_start = 0; /* err pages and ranges don't mix */
range_len = MAXINT(off_t);
if (range_start) {
} else {
range_len = range_end - range_start + 1;
send_headers(HTTP_PARTIAL_CONTENT);
- headers = 0;
+ what = SEND_BODY;
}
}
#endif
- if (headers)
+ if (what & SEND_HEADERS)
send_headers(HTTP_OK);
- /* If you want to know about EPIPE below
- * (happens if you abort downloads from local httpd): */
- signal(SIGPIPE, SIG_IGN);
-
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
offset = range_start;
do {
while ((count = safe_read(f, iobuf, IOBUF_SIZE)) > 0) {
ssize_t n;
USE_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
- n = full_write(1, iobuf, count);
+ n = full_write(STDOUT_FILENO, iobuf, count);
if (count != n)
break;
USE_FEATURE_HTTPD_RANGES(range_len -= count;)
{
Htaccess_IP *cur;
- /* This could stand some work */
for (cur = ip_a_d; cur; cur = cur->next) {
#if DEBUG
fprintf(stderr,
);
#endif
if ((rmt_ip & cur->mask) == cur->ip)
- return cur->allow_deny == 'A'; /* Allow/Deny */
+ return (cur->allow_deny == 'A'); /* A -> 1 */
}
- /* if unconfigured, return 1 - access from all */
- return !flg_deny_all;
+ return !flg_deny_all; /* depends on whether we saw "D:*" */
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
/*
- * 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, const 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;
+
+ dir_prefix = cur->before_colon;
+
+ /* WHY? */
+ /* If already saw a match, don't accept other different matches */
+ if (prev && strcmp(prev, dir_prefix) != 0)
+ continue;
- 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);
+ fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);
- l = strlen(p0);
- if (strncmp(p0, path, l) == 0
- && (l == 1 || path[l] == '/' || path[l] == '\0')
+ /* 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'))
) {
- 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;
- }
+ continue;
+ }
- if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
- char *cipher;
- char *pp;
+ /* Path match found */
+ prev = dir_prefix;
- if (strncmp(p, request, u - request) != 0) {
- /* user doesn't match */
- continue;
- }
- pp = strchr(p, ':');
- if (pp && pp[1] == '$' && pp[2] == '1'
- && pp[3] == '$' && pp[4]
- ) {
- pp++;
- cipher = pw_encrypt(u+1, pp);
- if (strcmp(cipher, pp) == 0)
- goto set_remoteuser_var; /* Ok */
- /* unauthorized */
+ if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
+ char *md5_passwd;
+
+ md5_passwd = strchr(cur->after_colon, ':');
+ if (md5_passwd && md5_passwd[1] == '$' && md5_passwd[2] == '1'
+ && md5_passwd[3] == '$' && md5_passwd[4]
+ ) {
+ char *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;
}
+
+ encrypted = pw_encrypt(
+ user_and_passwd + user_len_p1 /* cleartext pwd from user */,
+ md5_passwd /*salt */, 1 /* cleanup */);
+ r = strcmp(encrypted, md5_passwd);
+ free(encrypted);
+ if (r == 0)
+ goto set_remoteuser_var; /* Ok */
+ continue;
}
+ }
- if (strcmp(p, request) == 0) {
+ /* Comparing plaintext "user:pass" in one go */
+ if (strcmp(cur->after_colon, user_and_passwd) == 0) {
set_remoteuser_var:
- remoteuser = strdup(request);
- if (remoteuser)
- remoteuser[u - request] = '\0';
- return 1; /* Ok */
- }
- /* unauthorized */
+ 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 */
* Handle timeouts
*/
static void exit_on_signal(int sig) ATTRIBUTE_NORETURN;
-static void exit_on_signal(int sig)
+static void exit_on_signal(int sig ATTRIBUTE_UNUSED)
{
send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
}
static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
{
static const char request_GET[] ALIGN1 = "GET";
-
struct stat sb;
char *urlcopy;
char *urlp;
char *tptr;
- int ip_allowed;
#if ENABLE_FEATURE_HTTPD_CGI
+ static const char request_HEAD[] ALIGN1 = "HEAD";
const char *prequest;
char *cookie = NULL;
char *content_type = NULL;
#define prequest request_GET
unsigned long length = 0;
#endif
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ smallint authorized = -1;
+#endif
+ smallint ip_allowed;
char http_major_version;
#if ENABLE_FEATURE_HTTPD_PROXY
char http_minor_version;
char *header_ptr = header_ptr;
Htaccess_Proxy *proxy_entry;
#endif
- struct sigaction sa;
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- int credentials = -1; /* if not required this is Ok */
-#endif
/* Allocation of iobuf is postponed until now
* (IOW, server process doesn't need to waste 8k) */
iobuf = xmalloc(IOBUF_SIZE);
rmt_ip = 0;
- if (fromAddr->sa.sa_family == AF_INET) {
- rmt_ip = ntohl(fromAddr->sin.sin_addr.s_addr);
+ if (fromAddr->u.sa.sa_family == AF_INET) {
+ rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
}
#if ENABLE_FEATURE_IPV6
- if (fromAddr->sa.sa_family == AF_INET6
- && fromAddr->sin6.sin6_addr.s6_addr32[0] == 0
- && fromAddr->sin6.sin6_addr.s6_addr32[1] == 0
- && ntohl(fromAddr->sin6.sin6_addr.s6_addr32[2]) == 0xffff)
- rmt_ip = ntohl(fromAddr->sin6.sin6_addr.s6_addr32[3]);
+ if (fromAddr->u.sa.sa_family == AF_INET6
+ && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
+ && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
+ && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
+ rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
#endif
if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
- rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->sa);
+ /* NB: can be NULL (user runs httpd -i by hand?) */
+ rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
}
if (verbose) {
/* this trick makes -v logging much simpler */
- applet_name = rmt_ip_str;
+ if (rmt_ip_str)
+ applet_name = rmt_ip_str;
if (verbose > 2)
bb_error_msg("connected");
}
/* Install timeout handler */
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = exit_on_signal;
- /* sigemptyset(&sa.sa_mask); - memset should be enough */
- /*sa.sa_flags = 0; - no SA_RESTART */
- sigaction(SIGALRM, &sa, NULL);
+ signal_no_SA_RESTART_empty_mask(SIGALRM, exit_on_signal);
alarm(HEADER_READ_TIMEOUT);
if (!get_line()) /* EOF or error or empty line */
#if ENABLE_FEATURE_HTTPD_CGI
prequest = request_GET;
if (strcasecmp(iobuf, prequest) != 0) {
- prequest = "POST";
- if (strcasecmp(iobuf, prequest) != 0)
- send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
+ prequest = request_HEAD;
+ if (strcasecmp(iobuf, prequest) != 0) {
+ prequest = "POST";
+ if (strcasecmp(iobuf, prequest) != 0)
+ send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
+ }
}
#else
if (strcasecmp(iobuf, request_GET) != 0)
*tptr = '\0';
/* Copy URL from after "GET "/"POST " to stack-allocated char[] */
- urlcopy = alloca((tptr - urlp) + sizeof("/index.html"));
+ urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
/*if (urlcopy == NULL)
* send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
strcpy(urlcopy, urlp);
/* Canonicalize path */
/* Algorithm stolen from libbb bb_simplify_path(),
- * but don't strdup and reducing trailing slash and protect out root */
+ * but don't strdup, retain trailing slash, protect root */
urlp = tptr = urlcopy;
do {
if (*urlp == '/') {
continue;
}
if (*tptr == '.') {
- /* skip extra '.' */
+ /* skip extra "/./" */
if (tptr[1] == '/' || !tptr[1]) {
continue;
}
- /* '..': be careful */
+ /* "..": be careful */
if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
++tptr;
if (urlp == urlcopy) /* protect root */
}
*++urlp = *tptr;
} while (*++tptr);
- *++urlp = '\0'; /* so keep last character */
- tptr = urlp; /* end ptr */
+ *++urlp = '\0'; /* terminate after last character */
/* If URL is a directory, add '/' */
- if (tptr[-1] != '/') {
+ if (urlp[-1] != '/') {
if (is_directory(urlcopy + 1, 1, &sb)) {
found_moved_temporarily = urlcopy;
}
/* have path1/path2 */
*tptr = '\0';
if (is_directory(urlcopy + 1, 1, &sb)) {
- /* may be having subdir config */
+ /* may have subdir config */
parse_conf(urlcopy + 1, SUBDIR_PARSE);
ip_allowed = checkPermIP();
}
/* Try and do our best to parse more lines */
if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
/* extra read only for POST */
- if (prequest != request_GET) {
- tptr = iobuf + sizeof("Content-length:") - 1;
+ if (prequest != request_GET
+#if ENABLE_FEATURE_HTTPD_CGI
+ && prequest != request_HEAD
+#endif
+ ) {
+ tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
if (!tptr[0])
send_headers_and_exit(HTTP_BAD_REQUEST);
- errno = 0;
/* not using strtoul: it ignores leading minus! */
- length = strtol(tptr, &tptr, 10);
+ length = bb_strtou(tptr, NULL, 10);
/* length is "ulong", but we need to pass it to int later */
- /* so we check for negative or too large values in one go: */
- /* (long -> ulong conv caused negatives to be seen as > INT_MAX) */
- if (tptr[0] || errno || length > INT_MAX)
+ 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 = strdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
+ cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
} else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
- content_type = strdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
+ content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
} else if (STRNCASECMP(iobuf, "Referer:") == 0) {
- referer = strdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
+ referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
} else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
- user_agent = strdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
+ user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
}
#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)
tptr += sizeof("Basic")-1;
/* decodeBase64() skips whitespace itself */
decodeBase64(tptr);
- credentials = checkPerm(urlcopy, tptr);
+ authorized = check_user_passwd(urlcopy, tptr);
}
-#endif /* FEATURE_HTTPD_BASIC_AUTH */
+#endif
#if ENABLE_FEATURE_HTTPD_RANGES
if (STRNCASECMP(iobuf, "Range:") == 0) {
/* We know only bytes=NNN-[MMM] */
/* We are done reading headers, disable peer timeout */
alarm(0);
- if (strcmp(bb_basename(urlcopy), httpd_conf) == 0 || ip_allowed == 0) {
+ if (strcmp(bb_basename(urlcopy), httpd_conf) == 0 || !ip_allowed) {
/* protect listing [/path]/httpd_conf or IP deny */
send_headers_and_exit(HTTP_FORBIDDEN);
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- if (credentials <= 0 && checkPerm(urlcopy, ":") == 0) {
+ /* Case: no "Authorization:" was seen, but page does require passwd.
+ * Check that with dummy user:pass */
+ if (authorized < 0)
+ authorized = check_user_passwd(urlcopy, ":");
+ if (!authorized)
send_headers_and_exit(HTTP_UNAUTHORIZED);
- }
#endif
if (found_moved_temporarily) {
lsa = host2sockaddr(proxy_entry->host_port, 80);
if (lsa == NULL)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
- if (connect(proxy_fd, &lsa->sa, lsa->len) < 0)
+ 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 */
}
}
#endif
- if (prequest != request_GET) {
+ if (prequest != request_GET && prequest != request_HEAD) {
send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
}
#endif /* FEATURE_HTTPD_CGI */
if (urlp[-1] == '/')
- strcpy(urlp, "index.html");
+ strcpy(urlp, index_page);
if (stat(tptr, &sb) == 0) {
file_size = sb.st_size;
last_mod = sb.st_mtime;
* }
*/
- send_file_and_exit(tptr, TRUE);
+ send_file_and_exit(tptr,
+#if ENABLE_FEATURE_HTTPD_CGI
+ (prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
+#else
+ SEND_HEADERS_AND_BODY
+#endif
+ );
}
/*
/* Wait for connections... */
fromAddr.len = LSA_SIZEOF_SA;
- n = accept(server_socket, &fromAddr.sa, &fromAddr.len);
+ n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
if (n < 0)
continue;
/* Wait for connections... */
fromAddr.len = LSA_SIZEOF_SA;
- n = accept(server_socket, &fromAddr.sa, &fromAddr.len);
+ n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
if (n < 0)
continue;
{
len_and_sockaddr fromAddr;
+ memset(&fromAddr, 0, sizeof(fromAddr));
fromAddr.len = LSA_SIZEOF_SA;
- getpeername(0, &fromAddr.sa, &fromAddr.len);
+ /* NB: can fail if user runs it by hand and types in http cmds */
+ getpeername(0, &fromAddr.u.sa, &fromAddr.len);
handle_incoming_and_exit(&fromAddr);
}
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
static void sighup_handler(int sig)
{
- struct sigaction sa;
-
parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = sighup_handler;
- /*sigemptyset(&sa.sa_mask); - memset should be enough */
- sa.sa_flags = SA_RESTART;
- sigaction(SIGHUP, &sa, NULL);
+ signal_SA_RESTART_empty_mask(SIGHUP, sighup_handler);
}
#endif
int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int httpd_main(int argc, char **argv)
+int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
int server_socket = server_socket; /* for gcc */
unsigned opt;
/* -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 can end up
- * relative too. */
+ * 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:")
#endif
#if ENABLE_FEATURE_HTTPD_AUTH_MD5
if (opt & OPT_MD5) {
- puts(pw_encrypt(pass, "$1$"));
+ puts(pw_encrypt(pass, "$1$", 1));
return 0;
}
#endif
#if ENABLE_FEATURE_HTTPD_SETUID
if (opt & OPT_SETUID) {
if (!get_uidgid(&ugid, s_ugid, 1))
- bb_error_msg_and_die("unrecognized user[:group] "
+ bb_error_msg_and_die("unknown user[:group] "
"name '%s'", s_ugid);
}
#endif
* Besides, it is also smaller. */
{
char *p = getenv("PATH");
- /* env strings themself are not freed, no need to strdup(p): */
+ /* env strings themself are not freed, no need to xstrdup(p): */
clearenv();
if (p)
putenv(p - 5);
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
if (!(opt & OPT_INETD))
sighup_handler(0);
- else /* do not install HUP handler in inetd mode */
#endif
- parse_conf(default_path_httpd_conf, FIRST_PARSE);
+ parse_conf(default_path_httpd_conf, FIRST_PARSE);
xfunc_error_retval = 0;
if (opt & OPT_INETD)
projects / oweals / busybox.git / blobdiff