From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/net/ipv6/netfilter/ip6t_frag.c | 136 ++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 kernel/net/ipv6/netfilter/ip6t_frag.c (limited to 'kernel/net/ipv6/netfilter/ip6t_frag.c') diff --git a/kernel/net/ipv6/netfilter/ip6t_frag.c b/kernel/net/ipv6/netfilter/ip6t_frag.c new file mode 100644 index 000000000..3b5735e56 --- /dev/null +++ b/kernel/net/ipv6/netfilter/ip6t_frag.c @@ -0,0 +1,136 @@ +/* Kernel module to match FRAG parameters. */ + +/* (C) 2001-2002 Andras Kis-Szabo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Xtables: IPv6 fragment match"); +MODULE_AUTHOR("Andras Kis-Szabo "); + +/* Returns 1 if the id is matched by the range, 0 otherwise */ +static inline bool +id_match(u_int32_t min, u_int32_t max, u_int32_t id, bool invert) +{ + bool r; + pr_debug("id_match:%c 0x%x <= 0x%x <= 0x%x\n", invert ? '!' : ' ', + min, id, max); + r = (id >= min && id <= max) ^ invert; + pr_debug(" result %s\n", r ? "PASS" : "FAILED"); + return r; +} + +static bool +frag_mt6(const struct sk_buff *skb, struct xt_action_param *par) +{ + struct frag_hdr _frag; + const struct frag_hdr *fh; + const struct ip6t_frag *fraginfo = par->matchinfo; + unsigned int ptr = 0; + int err; + + err = ipv6_find_hdr(skb, &ptr, NEXTHDR_FRAGMENT, NULL, NULL); + if (err < 0) { + if (err != -ENOENT) + par->hotdrop = true; + return false; + } + + fh = skb_header_pointer(skb, ptr, sizeof(_frag), &_frag); + if (fh == NULL) { + par->hotdrop = true; + return false; + } + + pr_debug("INFO %04X ", fh->frag_off); + pr_debug("OFFSET %04X ", ntohs(fh->frag_off) & ~0x7); + pr_debug("RES %02X %04X", fh->reserved, ntohs(fh->frag_off) & 0x6); + pr_debug("MF %04X ", fh->frag_off & htons(IP6_MF)); + pr_debug("ID %u %08X\n", ntohl(fh->identification), + ntohl(fh->identification)); + + pr_debug("IPv6 FRAG id %02X ", + id_match(fraginfo->ids[0], fraginfo->ids[1], + ntohl(fh->identification), + !!(fraginfo->invflags & IP6T_FRAG_INV_IDS))); + pr_debug("res %02X %02X%04X %02X ", + fraginfo->flags & IP6T_FRAG_RES, fh->reserved, + ntohs(fh->frag_off) & 0x6, + !((fraginfo->flags & IP6T_FRAG_RES) && + (fh->reserved || (ntohs(fh->frag_off) & 0x06)))); + pr_debug("first %02X %02X %02X ", + fraginfo->flags & IP6T_FRAG_FST, + ntohs(fh->frag_off) & ~0x7, + !((fraginfo->flags & IP6T_FRAG_FST) && + (ntohs(fh->frag_off) & ~0x7))); + pr_debug("mf %02X %02X %02X ", + fraginfo->flags & IP6T_FRAG_MF, + ntohs(fh->frag_off) & IP6_MF, + !((fraginfo->flags & IP6T_FRAG_MF) && + !((ntohs(fh->frag_off) & IP6_MF)))); + pr_debug("last %02X %02X %02X\n", + fraginfo->flags & IP6T_FRAG_NMF, + ntohs(fh->frag_off) & IP6_MF, + !((fraginfo->flags & IP6T_FRAG_NMF) && + (ntohs(fh->frag_off) & IP6_MF))); + + return (fh != NULL) && + id_match(fraginfo->ids[0], fraginfo->ids[1], + ntohl(fh->identification), + !!(fraginfo->invflags & IP6T_FRAG_INV_IDS)) && + !((fraginfo->flags & IP6T_FRAG_RES) && + (fh->reserved || (ntohs(fh->frag_off) & 0x6))) && + !((fraginfo->flags & IP6T_FRAG_FST) && + (ntohs(fh->frag_off) & ~0x7)) && + !((fraginfo->flags & IP6T_FRAG_MF) && + !(ntohs(fh->frag_off) & IP6_MF)) && + !((fraginfo->flags & IP6T_FRAG_NMF) && + (ntohs(fh->frag_off) & IP6_MF)); +} + +static int frag_mt6_check(const struct xt_mtchk_param *par) +{ + const struct ip6t_frag *fraginfo = par->matchinfo; + + if (fraginfo->invflags & ~IP6T_FRAG_INV_MASK) { + pr_debug("unknown flags %X\n", fraginfo->invflags); + return -EINVAL; + } + return 0; +} + +static struct xt_match frag_mt6_reg __read_mostly = { + .name = "frag", + .family = NFPROTO_IPV6, + .match = frag_mt6, + .matchsize = sizeof(struct ip6t_frag), + .checkentry = frag_mt6_check, + .me = THIS_MODULE, +}; + +static int __init frag_mt6_init(void) +{ + return xt_register_match(&frag_mt6_reg); +} + +static void __exit frag_mt6_exit(void) +{ + xt_unregister_match(&frag_mt6_reg); +} + +module_init(frag_mt6_init); +module_exit(frag_mt6_exit); -- cgit 1.2.3-korg