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| author | Jo-Philipp Wich <jow@openwrt.org> | 2010-08-11 00:05:34 +0000 |
|---|---|---|
| committer | Jo-Philipp Wich <jow@openwrt.org> | 2010-08-11 00:05:34 +0000 |
| commit | 3d99f030820877eb84835fb1be66a7db3f5b0c68 (patch) | |
| tree | ab165f9195ca06e8c8b635f0edce60ce30c5a706 /package/uhttpd/src/uhttpd-utils.c | |
| parent | a5371dfe3909f14d45803efcfa5a85446f7954ac (diff) | |
| download | upstream-3d99f030820877eb84835fb1be66a7db3f5b0c68.tar.gz upstream-3d99f030820877eb84835fb1be66a7db3f5b0c68.tar.bz2 upstream-3d99f030820877eb84835fb1be66a7db3f5b0c68.zip | |
uhttpd: add option to reject requests from RFC1918 IPs to public server IPs (DNS rebinding countermeasure)
SVN-Revision: 22589
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 60badf26df..4a1423c715 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) { |