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authorGravatar Denys Vlasenko <vda.linux@googlemail.com>2019-04-14 19:57:13 +0200
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2019-04-14 19:57:13 +0200
commit51792e126bddaabf572132f1e0d4ed9bfd324c58 (patch)
treec73fabbd6ad051a3a8d257c33ecb756a392932b4 /networking/httpd.c
parent60bf77f7e7c4513a781e9acc1b9bca64c4051140 (diff)
downloadbusybox-51792e126bddaabf572132f1e0d4ed9bfd324c58.tar.gz
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httpd: if remote IP is denied, send FORBIDDEN reply earlier
While at it, fix sighup_handler to not clobber errno. function old new delta send_HTTP_FORBIDDEN_and_exit_if_denied_ip - 47 +47 sighup_handler 15 30 +15 handle_incoming_and_exit 2791 2763 -28 checkPermIP 48 - -48 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 1/1 up/down: 62/-76) Total: -14 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/httpd.c')
-rw-r--r--networking/httpd.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/networking/httpd.c b/networking/httpd.c
index b52526a78..f713f6929 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -95,9 +95,7 @@
* If -c is not set, an attempt will be made to open the default
* root configuration file. If -c is set and the file is not found, the
* server exits with an error.
- *
*/
- /* TODO: use TCP_CORK, parse_config() */
//config:config HTTPD
//config: bool "httpd (32 kb)"
//config: default y
@@ -246,6 +244,8 @@
//usage: "\n -e STRING HTML encode STRING"
//usage: "\n -d STRING URL decode STRING"
+/* TODO: use TCP_CORK, parse_config() */
+
#include "libbb.h"
#include "common_bufsiz.h"
#if ENABLE_PAM
@@ -1817,7 +1817,7 @@ static NOINLINE void send_file_and_exit(const char *url, int what)
log_and_exit();
}
-static int checkPermIP(void)
+static void send_HTTP_FORBIDDEN_and_exit_if_denied_ip(void)
{
Htaccess_IP *cur;
@@ -1837,10 +1837,13 @@ static int checkPermIP(void)
);
#endif
if ((rmt_ip & cur->mask) == cur->ip)
- return (cur->allow_deny == 'A'); /* A -> 1 */
+ if (cur->allow_deny == 'A')
+ return;
+ send_headers_and_exit(HTTP_FORBIDDEN);
}
- return !flg_deny_all; /* depends on whether we saw "D:*" */
+ if (flg_deny_all) /* depends on whether we saw "D:*" */
+ send_headers_and_exit(HTTP_FORBIDDEN);
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
@@ -2090,7 +2093,6 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
#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;
@@ -2240,14 +2242,14 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
bb_error_msg("url:%s", urlcopy);
tptr = urlcopy;
- ip_allowed = checkPermIP();
- while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
+ send_HTTP_FORBIDDEN_and_exit_if_denied_ip();
+ while ((tptr = strchr(tptr + 1, '/')) != NULL) {
/* have path1/path2 */
*tptr = '\0';
if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
/* may have subdir config */
parse_conf(urlcopy + 1, SUBDIR_PARSE);
- ip_allowed = checkPermIP();
+ send_HTTP_FORBIDDEN_and_exit_if_denied_ip();
}
*tptr = '/';
}
@@ -2380,7 +2382,7 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
/* We are done reading headers, disable peer timeout */
alarm(0);
- if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
+ if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0) {
/* protect listing [/path]/httpd.conf or IP deny */
send_headers_and_exit(HTTP_FORBIDDEN);
}
@@ -2593,7 +2595,9 @@ static void mini_httpd_inetd(void)
static void sighup_handler(int sig UNUSED_PARAM)
{
+ int sv = errno;
parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
+ errno = sv;
}
enum {