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uhttpd: - fix parsing of interpreter entries in the config file, fixes serving of static files as .cgi with X-Wrt - better cope with connection aborts, especially during header transfer - fix return value checking of TLS reads and writes, solves some blocking issues

Browse Source 
SVN-Revision: 22692
This commit is contained in:
Jo-Philipp Wich 2010-08-18 00:04:52 +00:00
parent af0ecdebfd
commit cbdeb30a1b
8 changed files with 141 additions and 108 deletions
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2
package/uhttpd/Makefile
View File

@ -8,7 +8,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=uhttpd
PKG_RELEASE:=15
PKG_RELEASE:=16
PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
PKG_BUILD_DEPENDS := libcyassl liblua

61
package/uhttpd/src/uhttpd-cgi.c
View File

@ -139,7 +139,7 @@ void uh_cgi_request(
struct client *cl, struct http_request *req,
struct path_info *pi, struct interpreter *ip
) {
int i, hdroff, bufoff;
int i, hdroff, bufoff, rv;
int hdrlen = 0;
int buflen = 0;
int fd_max = 0;
@ -376,12 +376,6 @@ void uh_cgi_request(
memset(hdr, 0, sizeof(hdr));
timeout.tv_sec = cl->server->conf->script_timeout;
timeout.tv_usec = 0;
#define ensure(x) \
do { if( x < 0 ) goto out; } while(0)
/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
while( 1 )
{
@ -391,11 +385,21 @@ void uh_cgi_request(
FD_SET(rfd[0], &reader);
FD_SET(wfd[1], &writer);
timeout.tv_sec = (header_sent < 1) ? cl->server->conf->script_timeout : 3;
timeout.tv_usec = 0;
ensure_out(rv = select_intr(fd_max, &reader,
(content_length > -1) ? &writer : NULL, NULL, &timeout));
/* timeout */
if( rv == 0 )
{
ensure_out(kill(child, 0));
}
/* wait until we can read or write or both */
if( select_intr(fd_max, &reader,
(content_length > -1) ? &writer : NULL, NULL,
(header_sent < 1) ? &timeout : NULL) > 0
) {
else if( rv > 0 )
{
/* ready to write to cgi program */
if( FD_ISSET(wfd[1], &writer) )
{
@ -403,7 +407,10 @@ void uh_cgi_request(
if( content_length > 0 )
{
/* read it from socket ... */
if( (buflen = uh_tcp_recv(cl, buf, min(content_length, sizeof(buf)))) > 0 )
ensure_out(buflen = uh_tcp_recv(cl, buf,
min(content_length, sizeof(buf))));
if( buflen > 0 )
{
/* ... and write it to child's stdin */
if( write(wfd[1], buf, buflen) < 0 )
@ -456,7 +463,7 @@ void uh_cgi_request(
if( (res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL )
{
/* write status */
ensure(uh_http_sendf(cl, NULL,
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode,
@ -466,7 +473,7 @@ void uh_cgi_request(
if( !uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type")
) {
ensure(uh_http_send(cl, NULL,
ensure_out(uh_http_send(cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
@ -474,32 +481,32 @@ void uh_cgi_request(
if( (req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding")
) {
ensure(uh_http_send(cl, NULL,
ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
ensure(uh_http_sendf(cl, NULL, "%s: %s\r\n",
ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
ensure(uh_http_send(cl, NULL, "\r\n", -1));
ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
/* push out remaining head buffer */
if( hdroff < hdrlen )
ensure(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
}
/* ... failed and head buffer exceeded */
else if( hdrlen >= sizeof(hdr) )
{
ensure(uh_cgi_error_500(cl, req,
ensure_out(uh_cgi_error_500(cl, req,
"The CGI program generated an invalid response:\n\n"));
ensure(uh_http_send(cl, req, hdr, hdrlen));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* ... failed but free buffer space, try again */
@ -510,7 +517,7 @@ void uh_cgi_request(
/* push out remaining read buffer */
if( bufoff < buflen )
ensure(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
header_sent = 1;
continue;
@ -518,7 +525,7 @@ void uh_cgi_request(
/* headers complete, pass through buffer to socket */
ensure(uh_http_send(cl, req, buf, buflen));
ensure_out(uh_http_send(cl, req, buf, buflen));
}
/* looks like eof from child */
@ -538,7 +545,7 @@ void uh_cgi_request(
* build the required headers here.
*/
ensure(uh_http_sendf(cl, NULL,
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
@ -546,11 +553,11 @@ void uh_cgi_request(
? "Transfer-Encoding: chunked\r\n" : ""
));
ensure(uh_http_send(cl, req, hdr, hdrlen));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* send final chunk if we're in chunked transfer mode */
ensure(uh_http_send(cl, req, "", 0));
ensure_out(uh_http_send(cl, req, "", 0));
break;
}
}
@ -561,13 +568,13 @@ void uh_cgi_request(
{
if( (errno != EINTR) && ! header_sent )
{
ensure(uh_http_sendhf(cl, 504, "Gateway Timeout",
ensure_out(uh_http_sendhf(cl, 504, "Gateway Timeout",
"The CGI script took too long to produce "
"a response"));
}
/* send final chunk if we're in chunked transfer mode */
ensure(uh_http_send(cl, req, "", 0));
ensure_out(uh_http_send(cl, req, "", 0));
break;
}

80
package/uhttpd/src/uhttpd-file.c
View File

@ -97,8 +97,6 @@ static char * uh_file_header_lookup(struct http_request *req, const char *name)
return NULL;
}
#define ensure_ret(x) \
do { if( x < 0 ) return -1; } while(0)
static int uh_file_response_ok_hdrs(struct client *cl, struct http_request *req, struct stat *s)
{
@ -132,7 +130,7 @@ static int uh_file_response_412(struct client *cl, struct http_request *req)
"Connection: close\r\n", req->version);
}
static int uh_file_if_match(struct client *cl, struct http_request *req, struct stat *s)
static int uh_file_if_match(struct client *cl, struct http_request *req, struct stat *s, int *ok)
{
const char *tag = uh_file_mktag(s);
char *hdr = uh_file_header_lookup(req, "If-Match");
@ -152,43 +150,44 @@ static int uh_file_if_match(struct client *cl, struct http_request *req, struct
}
else if( !strcmp(p, "*") || !strcmp(p, tag) )
{
return 1;
*ok = 1;
return *ok;
}
}
uh_file_response_412(cl, req);
return 0;
*ok = 0;
ensure_ret(uh_file_response_412(cl, req));
return *ok;
}
return 1;
*ok = 1;
return *ok;
}
static int uh_file_if_modified_since(struct client *cl, struct http_request *req, struct stat *s)
static int uh_file_if_modified_since(struct client *cl, struct http_request *req, struct stat *s, int *ok)
{
char *hdr = uh_file_header_lookup(req, "If-Modified-Since");
*ok = 1;
if( hdr )
{
if( uh_file_date2unix(hdr) < s->st_mtime )
if( uh_file_date2unix(hdr) >= s->st_mtime )
{
return 1;
}
else
{
uh_file_response_304(cl, req, s);
return 0;
*ok = 0;
ensure_ret(uh_file_response_304(cl, req, s));
}
}
return 1;
return *ok;
}
static int uh_file_if_none_match(struct client *cl, struct http_request *req, struct stat *s)
static int uh_file_if_none_match(struct client *cl, struct http_request *req, struct stat *s, int *ok)
{
const char *tag = uh_file_mktag(s);
char *hdr = uh_file_header_lookup(req, "If-None-Match");
char *p;
int i;
*ok = 1;
if( hdr )
{
@ -203,53 +202,54 @@ static int uh_file_if_none_match(struct client *cl, struct http_request *req, st
}
else if( !strcmp(p, "*") || !strcmp(p, tag) )
{
*ok = 0;
if( (req->method == UH_HTTP_MSG_GET) ||
(req->method == UH_HTTP_MSG_HEAD) )
uh_file_response_304(cl, req, s);
ensure_ret(uh_file_response_304(cl, req, s));
else
uh_file_response_412(cl, req);
ensure_ret(uh_file_response_412(cl, req));
return 0;
break;
}
}
}
return 1;
return *ok;
}
static int uh_file_if_range(struct client *cl, struct http_request *req, struct stat *s)
static int uh_file_if_range(struct client *cl, struct http_request *req, struct stat *s, int *ok)
{
char *hdr = uh_file_header_lookup(req, "If-Range");
*ok = 1;
if( hdr )
{
uh_file_response_412(cl, req);
return 0;
*ok = 0;
ensure_ret(uh_file_response_412(cl, req));
}
return 1;
return *ok;
}
static int uh_file_if_unmodified_since(struct client *cl, struct http_request *req, struct stat *s)
static int uh_file_if_unmodified_since(struct client *cl, struct http_request *req, struct stat *s, int *ok)
{
char *hdr = uh_file_header_lookup(req, "If-Unmodified-Since");
*ok = 1;
if( hdr )
{
if( uh_file_date2unix(hdr) <= s->st_mtime )
{
uh_file_response_412(cl, req);
return 0;
*ok = 0;
ensure_ret(uh_file_response_412(cl, req));
}
}
return 1;
return *ok;
}
#define ensure_out(x) \
do { if( x < 0 ) goto out; } while(0)
static int uh_file_scandir_filter_dir(const struct dirent *e)
{
return strcmp(e->d_name, ".") ? 1 : 0;
@ -335,6 +335,7 @@ out:
void uh_file_request(struct client *cl, struct http_request *req, struct path_info *pi)
{
int rlen;
int ok = 1;
int fd = -1;
char buf[UH_LIMIT_MSGHEAD];
@ -342,13 +343,14 @@ void uh_file_request(struct client *cl, struct http_request *req, struct path_in
if( (pi->stat.st_mode & S_IFREG) && ((fd = open(pi->phys, O_RDONLY)) > 0) )
{
/* test preconditions */
if(
uh_file_if_modified_since(cl, req, &pi->stat) &&
uh_file_if_match(cl, req, &pi->stat) &&
uh_file_if_range(cl, req, &pi->stat) &&
uh_file_if_unmodified_since(cl, req, &pi->stat) &&
uh_file_if_none_match(cl, req, &pi->stat)
) {
if(ok) ensure_out(uh_file_if_modified_since(cl, req, &pi->stat, &ok));
if(ok) ensure_out(uh_file_if_match(cl, req, &pi->stat, &ok));
if(ok) ensure_out(uh_file_if_range(cl, req, &pi->stat, &ok));
if(ok) ensure_out(uh_file_if_unmodified_since(cl, req, &pi->stat, &ok));
if(ok) ensure_out(uh_file_if_none_match(cl, req, &pi->stat, &ok));
if( ok > 0 )
{
/* write status */
ensure_out(uh_file_response_200(cl, req, &pi->stat));

6
package/uhttpd/src/uhttpd-tls.c
View File

@ -70,12 +70,14 @@ void uh_tls_client_accept(struct client *c)
int uh_tls_client_recv(struct client *c, void *buf, int len)
{
return SSL_read(c->tls, buf, len);
int rv = SSL_read(c->tls, buf, len);
return (rv > 0) ? rv : -1;
}
int uh_tls_client_send(struct client *c, void *buf, int len)
{
return SSL_write(c->tls, buf, len);
int rv = SSL_write(c->tls, buf, len);
return (rv > 0) ? rv : -1;
}
void uh_tls_client_close(struct client *c)

27
package/uhttpd/src/uhttpd-utils.c
View File

@ -112,6 +112,7 @@ int select_intr(int n, fd_set *r, fd_set *w, fd_set *e, struct timeval *t)
/* unblock SIGCHLD */
sigemptyset(&ssn);
sigaddset(&ssn, SIGCHLD);
sigaddset(&ssn, SIGPIPE);
sigprocmask(SIG_UNBLOCK, &ssn, &sso);
rv = select(n, r, w, e, t);
@ -193,8 +194,6 @@ int uh_tcp_recv(struct client *cl, char *buf, int len)
return sz;
}
#define ensure(x) \
do { if( x < 0 ) return -1; } while(0)
int uh_http_sendhf(struct client *cl, int code, const char *summary, const char *fmt, ...)
{
@ -211,14 +210,14 @@ int uh_http_sendhf(struct client *cl, int code, const char *summary, const char
code, summary
);
ensure(uh_tcp_send(cl, buffer, len));
ensure_ret(uh_tcp_send(cl, buffer, len));
va_start(ap, fmt);
len = vsnprintf(buffer, sizeof(buffer), fmt, ap);
va_end(ap);
ensure(uh_http_sendc(cl, buffer, len));
ensure(uh_http_sendc(cl, NULL, 0));
ensure_ret(uh_http_sendc(cl, buffer, len));
ensure_ret(uh_http_sendc(cl, NULL, 0));
return 0;
}
@ -235,13 +234,13 @@ int uh_http_sendc(struct client *cl, const char *data, int len)
if( len > 0 )
{
clen = snprintf(chunk, sizeof(chunk), "%X\r\n", len);
ensure(uh_tcp_send(cl, chunk, clen));
ensure(uh_tcp_send(cl, data, len));
ensure(uh_tcp_send(cl, "\r\n", 2));
ensure_ret(uh_tcp_send(cl, chunk, clen));
ensure_ret(uh_tcp_send(cl, data, len));
ensure_ret(uh_tcp_send(cl, "\r\n", 2));
}
else
{
ensure(uh_tcp_send(cl, "0\r\n\r\n", 5));
ensure_ret(uh_tcp_send(cl, "0\r\n\r\n", 5));
}
return 0;
@ -259,9 +258,9 @@ int uh_http_sendf(
va_end(ap);
if( (req != NULL) && (req->version > 1.0) )
ensure(uh_http_sendc(cl, buffer, len));
ensure_ret(uh_http_sendc(cl, buffer, len));
else if( len > 0 )
ensure(uh_tcp_send(cl, buffer, len));
ensure_ret(uh_tcp_send(cl, buffer, len));
return 0;
}
@ -273,9 +272,9 @@ int uh_http_send(
len = strlen(buf);
if( (req != NULL) && (req->version > 1.0) )
ensure(uh_http_sendc(cl, buf, len));
ensure_ret(uh_http_sendc(cl, buf, len));
else if( len > 0 )
ensure(uh_tcp_send(cl, buf, len));
ensure_ret(uh_tcp_send(cl, buf, len));
return 0;
}
@ -639,7 +638,7 @@ struct auth_realm * uh_auth_add(char *path, char *user, char *pass)
) {
memcpy(new->pass, pwd->pw_passwd,
min(strlen(pwd->pw_passwd), sizeof(new->pass) - 1));
}
}
}
/* ordinary pwd */

7
package/uhttpd/src/uhttpd-utils.h
View File

@ -36,6 +36,13 @@
#define fd_cloexec(fd) \
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC)
#define ensure_out(x) \
do { if((x) < 0) goto out; } while(0)
#define ensure_ret(x) \
do { if((x) < 0) return -1; } while(0)
struct path_info {
char *root;
char *phys;

60
package/uhttpd/src/uhttpd.c
View File

@ -96,17 +96,18 @@ static void uh_config_parse(struct config *conf)
conf->error_handler = strdup(col1);
}
#ifdef HAVE_CGI
else if( (line[0] == '.') && (strchr(line, ':') != NULL) )
else if( (line[0] == '*') && (strchr(line, ':') != NULL) )
{
if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
!(eol = strchr(col1, '\n')) || (*eol++ = 0) )
if( !(col1 = strchr(line, '*')) || (*col1++ = 0) ||
!(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
!(eol = strchr(col2, '\n')) || (*eol++ = 0) )
continue;
if( !uh_interpreter_add(line, col1) )
if( !uh_interpreter_add(col1, col2) )
{
fprintf(stderr,
"Unable to add interpreter %s for extension %s: "
"Out of memory\n", col1, line
"Out of memory\n", col2, col1
);
}
}
@ -126,6 +127,10 @@ static int uh_socket_bind(
int status;
int bound = 0;
int tcp_ka_idl = 1;
int tcp_ka_int = 1;
int tcp_ka_cnt = 3;
struct listener *l = NULL;
struct addrinfo *addrs = NULL, *p = NULL;
@ -145,12 +150,22 @@ static int uh_socket_bind(
}
/* "address already in use" */
if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) == -1 )
if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) )
{
perror("setsockopt()");
goto error;
}
/* TCP keep-alive */
if( setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) ||
setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, &tcp_ka_idl, sizeof(tcp_ka_idl)) ||
setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &tcp_ka_int, sizeof(tcp_ka_int)) ||
setsockopt(sock, SOL_TCP, TCP_KEEPCNT, &tcp_ka_cnt, sizeof(tcp_ka_cnt)) )
{
fprintf(stderr, "Notice: Unable to enable TCP keep-alive: %s\n",
strerror(errno));
}
/* required to get parallel v4 + v6 working */
if( p->ai_family == AF_INET6 )
{
@ -355,7 +370,6 @@ static struct http_request * uh_http_header_recv(struct client *cl)
ssize_t blen = sizeof(buffer)-1;
ssize_t rlen = 0;
memset(buffer, 0, sizeof(buffer));
while( blen > 0 )
@ -371,41 +385,37 @@ static struct http_request * uh_http_header_recv(struct client *cl)
if( select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0 )
{
/* receive data */
rlen = uh_tcp_peek(cl, bufptr, blen);
ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen));
if( rlen > 0 )
if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
{
if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
{
blen -= uh_tcp_recv(cl, bufptr, (int)(idxptr - bufptr) + 4);
ensure_out(rlen = uh_tcp_recv(cl, bufptr,
(int)(idxptr - bufptr) + 4));
/* header read complete ... */
return uh_http_header_parse(cl, buffer, sizeof(buffer) - blen - 1);
}
else
{
rlen = uh_tcp_recv(cl, bufptr, rlen);
blen -= rlen;
bufptr += rlen;
}
/* header read complete ... */
blen -= rlen;
return uh_http_header_parse(cl, buffer,
sizeof(buffer) - blen - 1);
}
else
{
/* invalid request (unexpected eof/timeout) */
uh_http_response(cl, 408, "Request Timeout");
return NULL;
ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen));
blen -= rlen;
bufptr += rlen;
}
}
else
{
/* invalid request (unexpected eof/timeout) */
uh_http_response(cl, 408, "Request Timeout");
return NULL;
}
}
/* request entity too large */
uh_http_response(cl, 413, "Request Entity Too Large");
out:
return NULL;
}

6
package/uhttpd/src/uhttpd.h
View File

@ -28,6 +28,7 @@
#include <sys/select.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <linux/limits.h>
#include <netdb.h>
@ -44,6 +45,11 @@
#include <openssl/ssl.h>
#endif
/* uClibc... */
#ifndef SOL_TCP
#define SOL_TCP 6
#endif
#define UH_LIMIT_MSGHEAD 4096
#define UH_LIMIT_HEADERS 64