diff options
| author | jow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-08-11 00:05:34 +0000 |
|---|---|---|
| committer | jow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-08-11 00:05:34 +0000 |
| commit | fd370b69471a6202bd521a2c885389e17f275a65 (patch) | |
| tree | 446e864b34860bf49d334ae4d35d43cbf93b2b09 /package/uhttpd/src/uhttpd-utils.c | |
| parent | 9f39c015a8776a671d2ebf3ceb93a83249ed1045 (diff) | |
[package] uhttpd: add option to reject requests from RFC1918 IPs to public server IPs (DNS rebinding countermeasure)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22589 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/uhttpd/src/uhttpd-utils.c')
| -rw-r--r-- | package/uhttpd/src/uhttpd-utils.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/package/uhttpd/src/uhttpd-utils.c b/package/uhttpd/src/uhttpd-utils.c index 60badf26d..4a1423c71 100644 --- a/package/uhttpd/src/uhttpd-utils.c +++ b/package/uhttpd/src/uhttpd-utils.c @@ -59,6 +59,21 @@ int sa_port(void *sa) return ntohs(((struct sockaddr_in6 *)sa)->sin6_port); } +int sa_rfc1918(void *sa) +{ + struct sockaddr_in *v4 = (struct sockaddr_in *)sa; + unsigned long a = htonl(v4->sin_addr.s_addr); + + if( v4->sin_family == AF_INET ) + { + return ((a >= 0x0A000000) && (a <= 0x0AFFFFFF)) || + ((a >= 0xAC100000) && (a <= 0xAC1FFFFF)) || + ((a >= 0xC0A80000) && (a <= 0xC0A8FFFF)); + } + + return 0; +} + /* Simple strstr() like function that takes len arguments for both haystack and needle. */ char *strfind(char *haystack, int hslen, const char *needle, int ndlen) { |