* A:10.0.0.0/255.255.255.128 # Allow any address that previous set
* A:127.0.0.1 # Allow local loopback connections
* D:* # Deny from other IP connections
+ * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
* /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/
* subdir http request, any merge is discarded when the process exits. As a
* result, the subdir settings only have a lifetime of a single request.
*
+ * Custom error pages can contain an absolute path or be relative to
+ * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
+ * page can only be defined in the root configuration file and are not taken
+ * into account in local (directories) config files.
*
* If -c is not set, an attempt will be made to open the default
* root configuration file. If -c is set and the file is not found, the
//#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 MAX_MEMORY_BUF 8192 /* IO buffer */
+#if PIPE_BUF >= IOBUF_SIZE
+# error "PIPE_BUF >= IOBUF_SIZE"
+#endif
#define HEADER_READ_TIMEOUT 60
int allow_deny;
} Htaccess_IP;
+enum {
+ HTTP_OK = 200,
+ HTTP_PARTIAL_CONTENT = 206,
+ HTTP_MOVED_TEMPORARILY = 302,
+ HTTP_BAD_REQUEST = 400, /* malformed syntax */
+ HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
+ HTTP_NOT_FOUND = 404,
+ HTTP_FORBIDDEN = 403,
+ HTTP_REQUEST_TIMEOUT = 408,
+ HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
+ HTTP_INTERNAL_SERVER_ERROR = 500,
+ HTTP_CONTINUE = 100,
+#if 0 /* future use */
+ HTTP_SWITCHING_PROTOCOLS = 101,
+ HTTP_CREATED = 201,
+ HTTP_ACCEPTED = 202,
+ HTTP_NON_AUTHORITATIVE_INFO = 203,
+ HTTP_NO_CONTENT = 204,
+ HTTP_MULTIPLE_CHOICES = 300,
+ HTTP_MOVED_PERMANENTLY = 301,
+ HTTP_NOT_MODIFIED = 304,
+ HTTP_PAYMENT_REQUIRED = 402,
+ HTTP_BAD_GATEWAY = 502,
+ HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
+ HTTP_RESPONSE_SETSIZE = 0xffffffff
+#endif
+};
+
+static const uint16_t http_response_type[] ALIGN2 = {
+ HTTP_OK,
+#if ENABLE_FEATURE_HTTPD_RANGES
+ HTTP_PARTIAL_CONTENT,
+#endif
+ HTTP_MOVED_TEMPORARILY,
+ HTTP_REQUEST_TIMEOUT,
+ HTTP_NOT_IMPLEMENTED,
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ HTTP_UNAUTHORIZED,
+#endif
+ HTTP_NOT_FOUND,
+ HTTP_BAD_REQUEST,
+ HTTP_FORBIDDEN,
+ HTTP_INTERNAL_SERVER_ERROR,
+#if 0 /* not implemented */
+ HTTP_CREATED,
+ HTTP_ACCEPTED,
+ HTTP_NO_CONTENT,
+ HTTP_MULTIPLE_CHOICES,
+ HTTP_MOVED_PERMANENTLY,
+ HTTP_NOT_MODIFIED,
+ HTTP_BAD_GATEWAY,
+ HTTP_SERVICE_UNAVAILABLE,
+#endif
+};
+
+static const struct {
+ const char *name;
+ const char *info;
+} http_response[ARRAY_SIZE(http_response_type)] = {
+ { "OK", NULL },
+#if ENABLE_FEATURE_HTTPD_RANGES
+ { "Partial Content", NULL },
+#endif
+ { "Found", NULL },
+ { "Request Timeout", "No request appeared within 60 seconds" },
+ { "Not Implemented", "The requested method is not recognized" },
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+ { "Unauthorized", "" },
+#endif
+ { "Not Found", "The requested URL was not found" },
+ { "Bad Request", "Unsupported method" },
+ { "Forbidden", "" },
+ { "Internal Server Error", "Internal Server Error" },
+#if 0 /* not implemented */
+ { "Created" },
+ { "Accepted" },
+ { "No Content" },
+ { "Multiple Choices" },
+ { "Moved Permanently" },
+ { "Not Modified" },
+ { "Bad Gateway", "" },
+ { "Service Unavailable", "" },
+#endif
+};
+
+
struct globals {
int verbose; /* must be int (used by getopt32) */
smallint flg_deny_all;
unsigned rmt_ip; /* used for IP-based allow/deny rules */
time_t last_mod;
- off_t ContentLength; /* -1 - unknown */
char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
const char *bind_addr_or_port;
USE_FEATURE_HTTPD_CGI(char *referer;)
USE_FEATURE_HTTPD_CGI(char *user_agent;)
+ off_t file_size; /* -1 - unknown */
+#if ENABLE_FEATURE_HTTPD_RANGES
+ off_t range_start;
+ off_t range_end;
+ off_t range_len;
+#endif
+
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
Htaccess *g_auth; /* config user:password lines */
#endif
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
Htaccess *script_i; /* config script interpreters */
#endif
- char *iobuf; /* [MAX_MEMORY_BUF] */
+ char *iobuf; /* [IOBUF_SIZE] */
#define hdr_buf bb_common_bufsiz1
char *hdr_ptr;
int hdr_cnt;
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ const char *http_error_page[ARRAY_SIZE(http_response_type)];
+#endif
};
#define G (*ptr_to_globals)
#define verbose (G.verbose )
#define home_httpd (G.home_httpd )
#define found_mime_type (G.found_mime_type )
#define found_moved_temporarily (G.found_moved_temporarily)
-#define ContentLength (G.ContentLength )
#define last_mod (G.last_mod )
#define ip_a_d (G.ip_a_d )
#define g_realm (G.g_realm )
#define remoteuser (G.remoteuser )
#define referer (G.referer )
#define user_agent (G.user_agent )
+#define 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 )
+#endif
#define rmt_ip_str (G.rmt_ip_str )
#define g_auth (G.g_auth )
#define mime_a (G.mime_a )
#define iobuf (G.iobuf )
#define hdr_ptr (G.hdr_ptr )
#define hdr_cnt (G.hdr_cnt )
+#define http_error_page (G.http_error_page )
#define INIT_G() do { \
PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
USE_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
bind_addr_or_port = "80"; \
- ContentLength = -1; \
+ file_size = -1; \
} while (0)
-
-typedef enum {
- HTTP_OK = 200,
- HTTP_MOVED_TEMPORARILY = 302,
- HTTP_BAD_REQUEST = 400, /* malformed syntax */
- HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
- HTTP_NOT_FOUND = 404,
- HTTP_FORBIDDEN = 403,
- HTTP_REQUEST_TIMEOUT = 408,
- HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
- HTTP_INTERNAL_SERVER_ERROR = 500,
-#if 0 /* future use */
- HTTP_CONTINUE = 100,
- HTTP_SWITCHING_PROTOCOLS = 101,
- HTTP_CREATED = 201,
- HTTP_ACCEPTED = 202,
- HTTP_NON_AUTHORITATIVE_INFO = 203,
- HTTP_NO_CONTENT = 204,
- HTTP_MULTIPLE_CHOICES = 300,
- HTTP_MOVED_PERMANENTLY = 301,
- HTTP_NOT_MODIFIED = 304,
- HTTP_PAYMENT_REQUIRED = 402,
- HTTP_BAD_GATEWAY = 502,
- HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
- HTTP_RESPONSE_SETSIZE = 0xffffffff
-#endif
-} HttpResponseNum;
-
-typedef struct {
- HttpResponseNum type;
- const char *name;
- const char *info;
-} HttpEnumString;
-
-static const HttpEnumString httpResponseNames[] = {
- { HTTP_OK, "OK", NULL },
- { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
- { HTTP_REQUEST_TIMEOUT, "Request Timeout",
- "No request appeared within a reasonable time period." },
- { HTTP_NOT_IMPLEMENTED, "Not Implemented",
- "The requested method is not recognized by this server." },
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- { HTTP_UNAUTHORIZED, "Unauthorized", "" },
-#endif
- { HTTP_NOT_FOUND, "Not Found",
- "The requested URL was not found on this server." },
- { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
- { HTTP_FORBIDDEN, "Forbidden", "" },
- { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
- "Internal Server Error" },
-#if 0 /* not implemented */
- { HTTP_CREATED, "Created" },
- { HTTP_ACCEPTED, "Accepted" },
- { HTTP_NO_CONTENT, "No Content" },
- { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
- { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
- { HTTP_NOT_MODIFIED, "Not Modified" },
- { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
- { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
-#endif
+#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)
+/* Prototypes */
+static void send_file_and_exit(const char *url, int headers) ATTRIBUTE_NORETURN;
+
static void free_llist(has_next_ptr **pptr)
{
has_next_ptr *cur = *pptr;
free_llist((has_next_ptr**)pptr);
}
-static int scan_ip(const char **ep, unsigned *ip, unsigned char endc)
+/* Returns presumed mask width in bits or < 0 on error.
+ * Updates strp, stores IP at provided pointer */
+static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
{
- const char *p = *ep;
+ const char *p = *strp;
int auto_mask = 8;
+ unsigned ip = 0;
int j;
- *ip = 0;
+ if (*p == '/')
+ return -auto_mask;
+
for (j = 0; j < 4; j++) {
unsigned octet;
- if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != '\0')
+ if ((*p < '0' || *p > '9') && *p != '/' && *p)
return -auto_mask;
octet = 0;
while (*p >= '0' && *p <= '9') {
}
if (*p == '.')
p++;
- if (*p != '/' && *p != '\0')
+ if (*p != '/' && *p)
auto_mask += 8;
- *ip = ((*ip) << 8) | octet;
+ ip = (ip << 8) | octet;
}
- if (*p != '\0') {
+ if (*p) {
if (*p != endc)
return -auto_mask;
p++;
if (*p == '\0')
return -auto_mask;
}
- *ep = p;
+ *ipp = ip;
+ *strp = p;
return auto_mask;
}
-static int scan_ip_mask(const char *ipm, unsigned *ip, unsigned *mask)
+/* Returns 0 on success. Stores IP and mask at provided pointers */
+static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
{
int i;
- unsigned msk;
+ unsigned mask;
+ char *p;
- i = scan_ip(&ipm, ip, '/');
+ i = scan_ip(&str, ipp, '/');
if (i < 0)
return i;
- if (*ipm) {
- const char *p = ipm;
-
- i = 0;
- while (*p) {
- if (*p < '0' || *p > '9') {
- if (*p == '.') {
- i = scan_ip(&ipm, mask, 0);
- return i != 32;
- }
- return -1;
- }
- i *= 10;
- i += *p - '0';
- p++;
+
+ if (*str) {
+ /* there is /xxx after dotted-IP address */
+ i = bb_strtou(str, &p, 10);
+ if (*p == '.') {
+ /* 'xxx' itself is dotted-IP mask, parse it */
+ /* (return 0 (success) only if it has N.N.N.N form) */
+ return scan_ip(&str, maskp, '\0') - 32;
}
+ if (*p)
+ return -1;
}
- if (i > 32 || i < 0)
+
+ if (i > 32)
return -1;
- msk = 0x80000000;
- *mask = 0;
- while (i > 0) {
- *mask |= msk;
- msk >>= 1;
- i--;
+
+ if (sizeof(unsigned) == 4 && i == 32) {
+ /* mask >>= 32 below may not work */
+ mask = 0;
+ } else {
+ mask = 0xffffffff;
+ mask >>= i;
}
+ /* i == 0 -> *maskp = 0x00000000
+ * i == 1 -> *maskp = 0x80000000
+ * i == 4 -> *maskp = 0xf0000000
+ * i == 31 -> *maskp = 0xfffffffe
+ * i == 32 -> *maskp = 0xffffffff */
+ *maskp = (uint32_t)(~mask);
return 0;
}
* .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
*
* Any previous IP rules are discarded.
* If the flag argument is not SUBDIR_PARSE then all /path and mime rules
* are also discarded. That is, previous settings are retained if flag is
* SUBDIR_PARSE.
+ * Error pages are only parsed on the main config file.
*
* path Path where to look for httpd.conf (without filename).
* flag Type of the parse request.
if (flag == SUBDIR_PARSE || cf == NULL) {
cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
- if (cf == NULL) {
- if (flag == FIRST_PARSE)
- bb_error_msg_and_die(bb_msg_memory_exhausted);
- return;
- }
sprintf((char *)cf, "%s/%s", path, httpd_conf);
}
if (*p0 == 'a')
*p0 = 'A';
- else if (*p0 != 'D' && *p0 != 'A'
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- && *p0 != '/'
-#endif
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
- && *p0 != '.'
-#endif
-#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
- && *p0 != '*'
-#endif
- )
- continue;
if (*p0 == 'A' || *p0 == 'D') {
/* storing current config IP line */
pip = xzalloc(sizeof(Htaccess_IP));
}
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++; */
+ if (status < HTTP_CONTINUE) {
+ bb_error_msg("config error '%s' in '%s'", buf, cf);
+ 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);
+ break;
+ }
+ }
+ continue;
+ }
+#endif
+
#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 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
- if (p0 == NULL)
- continue;
+ p0 = xmalloc(strlen(cf) + (c - buf) + 2 + strlen(c));
c[-1] = '\0';
sprintf(p0, "/%s%s", cf, buf);
++p; /* so keep last character */
}
*p = '\0';
- sprintf(p0, "%s:%s", p0, c);
+ sprintf(p0 + strlen(p0), ":%s", c);
}
#endif
char ch;
while ((ch = *string++)) {
- // very simple check for what to encode
- if (isalnum(ch)) *p++ = ch;
- else p += sprintf(p, "&#%d;", (unsigned char) ch);
+ /* very simple check for what to encode */
+ if (isalnum(ch))
+ *p++ = ch;
+ else
+ p += sprintf(p, "&#%d;", (unsigned char) ch);
}
*p = '\0';
return out;
*/
static unsigned hex_to_bin(unsigned char c)
{
- unsigned v = c | 0x20; /* lowercase */
- v = v - '0';
+ unsigned v;
+
+ v = c - '0';
if (v <= 9)
return v;
- v = v + ('0' - 'a');
+ /* 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\n", c, hex_to_bin(c)); }
-int main() { t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
+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)
return orig;
}
-
-#if ENABLE_FEATURE_HTTPD_CGI
-/*
- * setenv helpers
- */
-static void setenv1(const char *name, const char *value)
-{
- if (!value)
- value = "";
- setenv(name, value, 1);
-}
-#endif
-
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
/*
* Decode a base64 data stream as per rfc1521.
static void log_and_exit(void) ATTRIBUTE_NORETURN;
static void log_and_exit(void)
{
+ /* Paranoia. IE said to be buggy. It may send some extra data
+ * or be confused by us just exiting without SHUT_WR. Oh well. */
+ shutdown(1, SHUT_WR);
+ ndelay_on(0);
+ while (read(0, iobuf, IOBUF_SIZE) > 0)
+ continue;
+
if (verbose > 2)
bb_error_msg("closed");
_exit(xfunc_error_retval);
* IE will puke big-time if the headers are not sent in one packet and the
* second packet is delayed for any reason.
* responseNum - the result code to send.
- * Return result of write().
*/
-static void send_headers(HttpResponseNum responseNum)
+static void send_headers(int responseNum)
{
static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
const char *responseString = "";
const char *infoString = NULL;
const char *mime_type;
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ const char *error_page = 0;
+#endif
unsigned i;
time_t timer = time(0);
char tmp_str[80];
int len;
- for (i = 0; i < ARRAY_SIZE(httpResponseNames); i++) {
- if (httpResponseNames[i].type == responseNum) {
- responseString = httpResponseNames[i].name;
- infoString = httpResponseNames[i].info;
+ for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
+ if (http_response_type[i] == responseNum) {
+ responseString = http_response[i].name;
+ infoString = http_response[i].info;
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ error_page = http_error_page[i];
+#endif
break;
}
}
(g_query ? g_query : ""));
}
- if (ContentLength != -1) { /* file */
+#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
+ if (error_page && !access(error_page, R_OK)) {
+ strcat(iobuf, "\r\n");
+ len += 2;
+
+ if (DEBUG)
+ fprintf(stderr, "headers: '%s'\n", iobuf);
+ full_write(1, iobuf, len);
+ if (DEBUG)
+ fprintf(stderr, "writing error page: '%s'\n", error_page);
+ return send_file_and_exit(error_page, FALSE);
+ }
+#endif
+
+ if (file_size != -1) { /* file */
strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
- len += sprintf(iobuf + len, "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
- tmp_str, "Content-length:", ContentLength);
+#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",
+ range_start,
+ range_end,
+ file_size);
+ file_size = range_end - range_start + 1;
+ }
+#endif
+ len += sprintf(iobuf + len,
+#if ENABLE_FEATURE_HTTPD_RANGES
+ "Accept-Ranges: bytes\r\n"
+#endif
+ "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
+ tmp_str,
+ "Content-length:",
+ file_size
+ );
}
iobuf[len++] = '\r';
iobuf[len++] = '\n';
}
}
-static void send_headers_and_exit(HttpResponseNum responseNum) ATTRIBUTE_NORETURN;
-static void send_headers_and_exit(HttpResponseNum responseNum)
+static void send_headers_and_exit(int responseNum) ATTRIBUTE_NORETURN;
+static void send_headers_and_exit(int responseNum)
{
send_headers(responseNum);
log_and_exit();
iobuf[count] = '\0';
return count;
}
- if (count < (MAX_MEMORY_BUF - 1)) /* check overflow */
+ if (count < (IOBUF_SIZE - 1)) /* check overflow */
count++;
}
return count;
}
#if ENABLE_FEATURE_HTTPD_CGI
+
+/* 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)
+{
+ enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
+ struct pollfd pfd[3];
+ int out_cnt; /* we buffer a bit of initial CGI output */
+ int count;
+
+ /* iobuf is used for CGI -> network data,
+ * hdr_buf is for network -> CGI data (POSTDATA) */
+
+ /* If CGI dies, we still want to correctly finish reading its output
+ * and send it to the peer. So please no SIGPIPEs! */
+ signal(SIGPIPE, SIG_IGN);
+
+ /* NB: breaking out of this loop jumps to log_and_exit() */
+ out_cnt = 0;
+ while (1) {
+ memset(pfd, 0, sizeof(pfd));
+
+ pfd[FROM_CGI].fd = fromCgi_rd;
+ pfd[FROM_CGI].events = POLLIN;
+
+ if (toCgi_wr) {
+ pfd[TO_CGI].fd = toCgi_wr;
+ if (hdr_cnt > 0) {
+ pfd[TO_CGI].events = POLLOUT;
+ } else if (post_len > 0) {
+ pfd[0].events = POLLIN;
+ } else {
+ /* post_len <= 0 && hdr_cnt <= 0:
+ * no more POST data to CGI,
+ * let CGI see EOF on CGI's stdin */
+ close(toCgi_wr);
+ toCgi_wr = 0;
+ }
+ }
+
+ /* Now wait on the set of sockets */
+ count = safe_poll(pfd, 3, -1);
+ if (count <= 0) {
+#if 0
+ if (waitpid(pid, &status, WNOHANG) <= 0) {
+ /* Weird. CGI didn't exit and no fd's
+ * are ready, yet poll returned?! */
+ continue;
+ }
+ if (DEBUG && WIFEXITED(status))
+ bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
+ if (DEBUG && WIFSIGNALED(status))
+ bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
+#endif
+ break;
+ }
+
+ if (pfd[TO_CGI].revents) {
+ /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
+ /* Have data from peer and can write to CGI */
+ count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
+ /* Doesn't happen, we dont use nonblocking IO here
+ *if (count < 0 && errno == EAGAIN) {
+ * ...
+ *} else */
+ if (count > 0) {
+ hdr_ptr += count;
+ hdr_cnt -= count;
+ } else {
+ /* EOF/broken pipe to CGI, stop piping POST data */
+ hdr_cnt = post_len = 0;
+ }
+ }
+
+ if (pfd[0].revents) {
+ /* post_len > 0 && hdr_cnt == 0 here */
+ /* We expect data, prev data portion is eaten by CGI
+ * and there *is* data to read from the peer
+ * (POSTDATA) */
+ //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
+ //count = safe_read(0, hdr_buf, count);
+ count = safe_read(0, hdr_buf, sizeof(hdr_buf));
+ if (count > 0) {
+ hdr_cnt = count;
+ hdr_ptr = hdr_buf;
+ post_len -= count;
+ } else {
+ /* no more POST data can be read */
+ post_len = 0;
+ }
+ }
+
+ if (pfd[FROM_CGI].revents) {
+ /* There is something to read from CGI */
+ char *rbuf = iobuf;
+
+ /* Are we still buffering CGI output? */
+ if (out_cnt >= 0) {
+ /* HTTP_200[] has single "\r\n" at the end.
+ * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
+ * CGI scripts MUST send their own header terminated by
+ * empty line, then data. That's why we have only one
+ * <cr><lf> pair here. We will output "200 OK" line
+ * if needed, but CGI still has to provide blank line
+ * between header and body */
+
+ /* Must use safe_read, not full_read, because
+ * CGI may output a few first bytes and then wait
+ * for POSTDATA without closing stdout.
+ * With full_read we may wait here forever. */
+ count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
+ if (count <= 0) {
+ /* eof (or error) and there was no "HTTP",
+ * so write it, then write received data */
+ if (out_cnt) {
+ full_write(1, HTTP_200, sizeof(HTTP_200)-1);
+ full_write(1, rbuf, out_cnt);
+ }
+ break; /* CGI stdout is closed, exiting */
+ }
+ out_cnt += count;
+ count = 0;
+ /* "Status" header format is: "Status: 302 Redirected\r\n" */
+ if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
+ /* send "HTTP/1.0 " */
+ if (full_write(1, HTTP_200, 9) != 9)
+ break;
+ rbuf += 8; /* skip "Status: " */
+ count = out_cnt - 8;
+ out_cnt = -1; /* buffering off */
+ } else if (out_cnt >= 4) {
+ /* Did CGI add "HTTP"? */
+ if (memcmp(rbuf, HTTP_200, 4) != 0) {
+ /* there is no "HTTP", do it ourself */
+ if (full_write(1, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
+ break;
+ }
+ /* Commented out:
+ if (!strstr(rbuf, "ontent-")) {
+ full_write(s, "Content-type: text/plain\r\n\r\n", 28);
+ }
+ * Counter-example of valid CGI without Content-type:
+ * echo -en "HTTP/1.0 302 Found\r\n"
+ * echo -en "Location: http://www.busybox.net\r\n"
+ * echo -en "\r\n"
+ */
+ count = out_cnt;
+ out_cnt = -1; /* buffering off */
+ }
+ } else {
+ count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
+ if (count <= 0)
+ break; /* eof (or error) */
+ }
+ if (full_write(1, rbuf, count) != count)
+ break;
+ if (DEBUG)
+ fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
+ } /* if (pfd[FROM_CGI].revents) */
+ } /* while (1) */
+ log_and_exit();
+}
+
+static void setenv1(const char *name, const char *value)
+{
+ setenv(name, value ? value : "", 1);
+}
+
/*
* Spawn CGI script, forward CGI's stdin/out <=> network
*
* Environment variables are set up and the script is invoked with pipes
- * for stdin/stdout. If a post is being done the script is fed the POST
+ * for stdin/stdout. If a POST is being done the script is fed the POST
* data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
*
* Parameters:
* const char *url The requested URL (with leading /).
- * int bodyLen Length of the post body.
+ * 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 *request,
- int bodyLen,
+ int post_len,
const char *cookie,
const char *content_type) ATTRIBUTE_NORETURN;
static void send_cgi_and_exit(
const char *url,
const char *request,
- int bodyLen,
+ int post_len,
const char *cookie,
const char *content_type)
{
char *fullpath;
char *script;
char *purl;
- int buf_count;
- int status;
- int pid = 0;
+ int pid;
/*
* We are mucking with environment _first_ and then vfork/exec,
}
}
setenv1("HTTP_USER_AGENT", user_agent);
- if (bodyLen)
- putenv(xasprintf("CONTENT_LENGTH=%d", bodyLen));
+ if (post_len)
+ putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
if (cookie)
setenv1("HTTP_COOKIE", cookie);
if (content_type)
/* Parent process */
- /* First, restore variables possibly changed by child */
+ /* Restore variables possibly changed by child */
xfunc_error_retval = 0;
- /* Prepare for pumping data.
- * iobuf is used for CGI -> network data,
- * hdr_buf is for network -> CGI data (POSTDATA) */
- buf_count = 0;
+ /* Pump data */
close(fromCgi.wr);
close(toCgi.rd);
-
- /* If CGI dies, we still want to correctly finish reading its output
- * and send it to the peer. So please no SIGPIPEs! */
- signal(SIGPIPE, SIG_IGN);
-
- /* This loop still looks messy. What is an exit criteria?
- * "CGI's output closed"? Or "CGI has exited"?
- * What to do if CGI has closed both input and output, but
- * didn't exit? etc... */
-
- /* NB: breaking out of this loop jumps to log_and_exit() */
- while (1) {
- fd_set readSet;
- fd_set writeSet;
- int nfound;
- int count;
-
- FD_ZERO(&readSet);
- FD_ZERO(&writeSet);
- FD_SET(fromCgi.rd, &readSet);
- if (bodyLen > 0 || hdr_cnt > 0) {
- FD_SET(toCgi.wr, &writeSet);
- nfound = toCgi.wr > fromCgi.rd ? toCgi.wr : fromCgi.rd;
- if (hdr_cnt <= 0)
- FD_SET(0, &readSet);
- /* Now wait on the set of sockets! */
- nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL);
- } else {
- if (!bodyLen) {
- close(toCgi.wr); /* no more POST data to CGI */
- bodyLen = -1;
- }
- nfound = select(fromCgi.rd + 1, &readSet, NULL, NULL, NULL);
- }
-
- if (nfound <= 0) {
- if (waitpid(pid, &status, WNOHANG) <= 0) {
- /* Weird. CGI didn't exit and no fd's
- * are ready, yet select returned?! */
- continue;
- }
- close(fromCgi.rd);
- if (DEBUG && WIFEXITED(status))
- bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
- if (DEBUG && WIFSIGNALED(status))
- bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
- break;
- }
-
- if (hdr_cnt > 0 && FD_ISSET(toCgi.wr, &writeSet)) {
- /* Have data from peer and can write to CGI */
- count = safe_write(toCgi.wr, hdr_ptr, hdr_cnt);
- /* Doesn't happen, we dont use nonblocking IO here
- *if (count < 0 && errno == EAGAIN) {
- * ...
- *} else */
- if (count > 0) {
- hdr_ptr += count;
- hdr_cnt -= count;
- } else {
- hdr_cnt = bodyLen = 0; /* EOF/broken pipe to CGI */
- }
- } else if (bodyLen > 0 && hdr_cnt == 0
- && FD_ISSET(0, &readSet)
- ) {
- /* We expect data, prev data portion is eaten by CGI
- * and there *is* data to read from the peer
- * (POSTDATA?) */
- count = bodyLen > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : bodyLen;
- count = safe_read(0, hdr_buf, count);
- if (count > 0) {
- hdr_cnt = count;
- hdr_ptr = hdr_buf;
- bodyLen -= count;
- } else {
- bodyLen = 0; /* closed */
- }
- }
-
-#define PIPESIZE PIPE_BUF
-#if PIPESIZE >= MAX_MEMORY_BUF
-# error "PIPESIZE >= MAX_MEMORY_BUF"
-#endif
- if (FD_ISSET(fromCgi.rd, &readSet)) {
- /* There is something to read from CGI */
- char *rbuf = iobuf;
-
- /* Are we still buffering CGI output? */
- if (buf_count >= 0) {
- /* HTTP_200[] has single "\r\n" at the end.
- * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
- * CGI scripts MUST send their own header terminated by
- * empty line, then data. That's why we have only one
- * <cr><lf> pair here. We will output "200 OK" line
- * if needed, but CGI still has to provide blank line
- * between header and body */
-
- /* Must use safe_read, not full_read, because
- * CGI may output a few first bytes and then wait
- * for POSTDATA without closing stdout.
- * With full_read we may wait here forever. */
- count = safe_read(fromCgi.rd, rbuf + buf_count, PIPESIZE - 8);
- if (count <= 0) {
- /* eof (or error) and there was no "HTTP",
- * so write it, then write received data */
- if (buf_count) {
- full_write(1, HTTP_200, sizeof(HTTP_200)-1);
- full_write(1, rbuf, buf_count);
- }
- break; /* CGI stdout is closed, exiting */
- }
- buf_count += count;
- count = 0;
- /* "Status" header format is: "Status: 302 Redirected\r\n" */
- if (buf_count >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
- /* send "HTTP/1.0 " */
- if (full_write(1, HTTP_200, 9) != 9)
- break;
- rbuf += 8; /* skip "Status: " */
- count = buf_count - 8;
- buf_count = -1; /* buffering off */
- } else if (buf_count >= 4) {
- /* 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)
- break;
- }
- /* Commented out:
- if (!strstr(rbuf, "ontent-")) {
- full_write(s, "Content-type: text/plain\r\n\r\n", 28);
- }
- * Counter-example of valid CGI without Content-type:
- * echo -en "HTTP/1.0 302 Found\r\n"
- * echo -en "Location: http://www.busybox.net\r\n"
- * echo -en "\r\n"
- */
- count = buf_count;
- buf_count = -1; /* buffering off */
- }
- } else {
- count = safe_read(fromCgi.rd, rbuf, PIPESIZE);
- if (count <= 0)
- break; /* eof (or error) */
- }
- if (full_write(1, rbuf, count) != count)
- break;
- if (DEBUG)
- fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
- } /* if (FD_ISSET(fromCgi.rd)) */
- } /* while (1) */
- log_and_exit();
+ cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
}
+
#endif /* FEATURE_HTTPD_CGI */
/*
* Send a file response to a HTTP request, and exit
+ *
+ * Parameters:
+ * const char *url The requested URL (with leading /).
+ * headers Don't send headers before if FALSE.
*/
-static void send_file_and_exit(const char *url) ATTRIBUTE_NORETURN;
-static void send_file_and_exit(const char *url)
+static void send_file_and_exit(const char *url, int headers)
{
static const char *const suffixTable[] = {
/* Warning: shorter equivalent suffix in one line must be first */
const char *try_suffix;
ssize_t count;
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
- off_t offset = 0;
+ off_t offset;
#endif
suffix = strrchr(url, '.');
if (f < 0) {
if (DEBUG)
bb_perror_msg("cannot open '%s'", url);
- send_headers_and_exit(HTTP_NOT_FOUND);
+ if (headers)
+ send_headers_and_exit(HTTP_NOT_FOUND);
+ }
+#if ENABLE_FEATURE_HTTPD_RANGES
+ if (!headers)
+ range_start = 0; /* err pages and ranges don't mix */
+ range_len = MAXINT(off_t);
+ if (range_start) {
+ if (!range_end) {
+ range_end = file_size - 1;
+ }
+ if (range_end < range_start
+ || lseek(f, range_start, SEEK_SET) != range_start
+ ) {
+ lseek(f, 0, SEEK_SET);
+ range_start = 0;
+ } else {
+ range_len = range_end - range_start + 1;
+ send_headers(HTTP_PARTIAL_CONTENT);
+ headers = 0;
+ }
}
+#endif
- send_headers(HTTP_OK);
+ if (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 {
- /* byte count (3rd arg) is rounded down to 64k */
- count = sendfile(1, f, &offset, MAXINT(ssize_t) - 0xffff);
+ /* 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 == 0)
+ if (offset == range_start)
goto fallback;
goto fin;
}
- } while (count > 0);
+ USE_FEATURE_HTTPD_RANGES(range_len -= sz;)
+ } while (count > 0 && range_len);
log_and_exit();
fallback:
#endif
- while ((count = safe_read(f, iobuf, MAX_MEMORY_BUF)) > 0) {
- ssize_t n = count;
- count = full_write(1, iobuf, count);
+ 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);
if (count != n)
break;
+ USE_FEATURE_HTTPD_RANGES(range_len -= count;)
+ if (!range_len)
+ break;
}
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
fin:
char *pp;
if (strncmp(p, request, u - request) != 0) {
- /* user uncompared */
+ /* user doesn't match */
continue;
}
pp = strchr(p, ':');
- if (pp && pp[1] == '$' && pp[2] == '1' &&
- pp[3] == '$' && pp[4]) {
+ if (pp && pp[1] == '$' && pp[2] == '1'
+ && pp[3] == '$' && pp[4]
+ ) {
pp++;
cipher = pw_encrypt(u+1, pp);
if (strcmp(cipher, pp) == 0)
set_remoteuser_var:
remoteuser = strdup(request);
if (remoteuser)
- remoteuser[(u - request)] = '\0';
+ remoteuser[u - request] = '\0';
return 1; /* Ok */
}
/* unauthorized */
/* Allocation of iobuf is postponed until now
* (IOW, server process doesn't need to waste 8k) */
- iobuf = xmalloc(MAX_MEMORY_BUF);
+ iobuf = xmalloc(IOBUF_SIZE);
rmt_ip = 0;
if (fromAddr->sa.sa_family == AF_INET) {
rmt_ip = ntohl(fromAddr->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]);
+#endif
if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->sa);
}
credentials = checkPerm(urlcopy, tptr);
}
#endif /* FEATURE_HTTPD_BASIC_AUTH */
+#if ENABLE_FEATURE_HTTPD_RANGES
+ if (STRNCASECMP(iobuf, "Range:") == 0) {
+ // We know only bytes=NNN-[MMM]
+ char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
+ if (strncmp(s, "bytes=", 6) == 0) {
+ s += sizeof("bytes=")-1;
+ range_start = BB_STRTOOFF(s, &s, 10);
+ if (s[0] != '-' || range_start < 0) {
+ range_start = 0;
+ } else if (s[1]) {
+ range_end = BB_STRTOOFF(s+1, NULL, 10);
+ if (errno || range_end < range_start)
+ range_start = 0;
+ }
+ }
+ }
+#endif
} /* while extra header reading */
}
if (urlp[-1] == '/')
strcpy(urlp, "index.html");
if (stat(tptr, &sb) == 0) {
- /* It's a dir URL and there is index.html */
- ContentLength = sb.st_size;
+ file_size = sb.st_size;
last_mod = sb.st_mtime;
}
#if ENABLE_FEATURE_HTTPD_CGI
* }
*/
- send_file_and_exit(tptr);
-
-#if 0 /* Is this needed? Why? */
- if (DEBUG)
- fprintf(stderr, "closing socket\n");
-#if ENABLE_FEATURE_HTTPD_CGI
- free(cookie);
- free(content_type);
- free(referer);
- referer = NULL;
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- free(remoteuser);
- remoteuser = NULL;
-#endif
-#endif
- /* Properly wait for remote to closed */
- int retval;
- shutdown(1, SHUT_WR);
- do {
- fd_set s_fd;
- struct timeval tv;
- FD_ZERO(&s_fd);
- FD_SET(0, &s_fd);
- tv.tv_sec = 2;
- tv.tv_usec = 0;
- retval = select(1, &s_fd, NULL, NULL, &tv);
- } while (retval > 0 && read(0, iobuf, sizeof(iobuf) > 0));
- shutdown(0, SHUT_RD);
- log_and_exit();
-#endif
+ send_file_and_exit(tptr, TRUE);
}
/*
/* Run a copy of ourself in inetd mode */
re_exec(argv_copy);
}
- /* parent, or fork failed */
+ /* parent, or vfork failed */
close(n);
} /* while (1) */
/* never reached */
#endif
}
-#if ENABLE_FEATURE_HTTPD_CGI
+#if 0 /*was #if ENABLE_FEATURE_HTTPD_CGI*/
+ /* User can do it himself: 'env - PATH="$PATH" httpd'
+ * We don't do it because we don't want to screw users
+ * which want to do
+ * 'env - VAR1=val1 VAR2=val2 https'
+ * and have VAR1 and VAR2 values visible in their CGIs.
+ * Besides, it is also smaller. */
{
char *p = getenv("PATH");
/* env strings themself are not freed, no need to strdup(p): */
projects / oweals / busybox.git / blobdiff