X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=openwrt%2Ftarget%2Flinux%2Fgeneric-2.4%2Fpatches%2F618-netfilter_multiport_backport.patch;fp=openwrt%2Ftarget%2Flinux%2Fgeneric-2.4%2Fpatches%2F618-netfilter_multiport_backport.patch;h=c34f9ecbb7c39075c632d6d905184dd7113fd79a;hb=3b8e92c0b46c53628d6d8e5f8d896a8946dddd3d;hp=0000000000000000000000000000000000000000;hpb=45f64e34f3ce667523f07589d28afdf3962e27d7;p=openwrt%2Fstaging%2Fdedeckeh.git diff --git a/openwrt/target/linux/generic-2.4/patches/618-netfilter_multiport_backport.patch b/openwrt/target/linux/generic-2.4/patches/618-netfilter_multiport_backport.patch new file mode 100644 index 0000000000..c34f9ecbb7 --- /dev/null +++ b/openwrt/target/linux/generic-2.4/patches/618-netfilter_multiport_backport.patch @@ -0,0 +1,231 @@ +diff -urN linux.old/include/linux/netfilter_ipv4/ipt_multiport.h linux.dev/include/linux/netfilter_ipv4/ipt_multiport.h +--- linux.old/include/linux/netfilter_ipv4/ipt_multiport.h 2000-12-11 22:31:30.000000000 +0100 ++++ linux.dev/include/linux/netfilter_ipv4/ipt_multiport.h 2006-02-04 05:23:54.318518250 +0100 +@@ -11,11 +11,12 @@ + + #define IPT_MULTI_PORTS 15 + +-/* Must fit inside union ipt_matchinfo: 16 bytes */ +-struct ipt_multiport ++struct ipt_multiport_v1 + { + u_int8_t flags; /* Type of comparison */ + u_int8_t count; /* Number of ports */ + u_int16_t ports[IPT_MULTI_PORTS]; /* Ports */ ++ u_int8_t pflags[IPT_MULTI_PORTS]; /* Port flags */ ++ u_int8_t invert; /* Invert flag */ + }; + #endif /*_IPT_MULTIPORT_H*/ +diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfilter/ipt_multiport.c +--- linux.old/net/ipv4/netfilter/ipt_multiport.c 2003-06-13 16:51:39.000000000 +0200 ++++ linux.dev/net/ipv4/netfilter/ipt_multiport.c 2006-02-04 05:34:27.362081000 +0100 +@@ -1,5 +1,14 @@ + /* Kernel module to match one of a list of TCP/UDP ports: ports are in + the same place so we can treat them as equal. */ ++ ++/* (C) 1999-2001 Paul `Rusty' Russell ++ * (C) 2002-2004 Netfilter Core Team ++ * ++ * 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. ++ */ ++ + #include + #include + #include +@@ -8,97 +17,136 @@ + #include + #include + ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Netfilter Core Team "); ++MODULE_DESCRIPTION("iptables multiple port match module"); ++ + #if 0 + #define duprintf(format, args...) printk(format , ## args) + #else + #define duprintf(format, args...) + #endif + ++/* from linux 2.6 skbuff.h */ ++static inline void *skb_header_pointer(const struct sk_buff *skb, int offset, ++ int len, void *buffer) ++{ ++ int hlen = skb_headlen(skb); ++ ++ if (hlen - offset >= len) ++ return skb->data + offset; ++ ++ if (skb_copy_bits(skb, offset, buffer, len) < 0) ++ return NULL; ++ ++ return buffer; ++} ++ ++ + /* Returns 1 if the port is matched by the test, 0 otherwise. */ + static inline int +-ports_match(const u_int16_t *portlist, enum ipt_multiport_flags flags, +- u_int8_t count, u_int16_t src, u_int16_t dst) ++ports_match_v1(const struct ipt_multiport_v1 *minfo, ++ u_int16_t src, u_int16_t dst) + { + unsigned int i; +- for (i=0; icount; i++) { ++ s = minfo->ports[i]; ++ ++ if (minfo->pflags[i]) { ++ /* range port matching */ ++ e = minfo->ports[++i]; ++ duprintf("src or dst matches with %d-%d?\n", s, e); ++ ++ if (minfo->flags == IPT_MULTIPORT_SOURCE ++ && src >= s && src <= e) ++ return 1 ^ minfo->invert; ++ if (minfo->flags == IPT_MULTIPORT_DESTINATION ++ && dst >= s && dst <= e) ++ return 1 ^ minfo->invert; ++ if (minfo->flags == IPT_MULTIPORT_EITHER ++ && ((dst >= s && dst <= e) ++ || (src >= s && src <= e))) ++ return 1 ^ minfo->invert; ++ } else { ++ /* exact port matching */ ++ duprintf("src or dst matches with %d?\n", s); ++ ++ if (minfo->flags == IPT_MULTIPORT_SOURCE ++ && src == s) ++ return 1 ^ minfo->invert; ++ if (minfo->flags == IPT_MULTIPORT_DESTINATION ++ && dst == s) ++ return 1 ^ minfo->invert; ++ if (minfo->flags == IPT_MULTIPORT_EITHER ++ && (src == s || dst == s)) ++ return 1 ^ minfo->invert; ++ } ++ } ++ ++ return minfo->invert; + } + + static int +-match(const struct sk_buff *skb, +- const struct net_device *in, +- const struct net_device *out, +- const void *matchinfo, +- int offset, +- const void *hdr, +- u_int16_t datalen, +- int *hotdrop) ++match_v1(const struct sk_buff *skb, ++ const struct net_device *in, ++ const struct net_device *out, ++ const void *matchinfo, ++ int offset, ++ int *hotdrop) + { +- const struct udphdr *udp = hdr; +- const struct ipt_multiport *multiinfo = matchinfo; ++ u16 _ports[2], *pptr; ++ const struct ipt_multiport_v1 *multiinfo = matchinfo; ++ ++ if (offset) ++ return 0; + +- /* Must be big enough to read ports. */ +- if (offset == 0 && datalen < sizeof(struct udphdr)) { ++ pptr = skb_header_pointer(skb, skb->nh.iph->ihl * 4, ++ sizeof(_ports), _ports); ++ if (pptr == NULL) { + /* We've been asked to examine this packet, and we +- can't. Hence, no choice but to drop. */ +- duprintf("ipt_multiport:" +- " Dropping evil offset=0 tinygram.\n"); +- *hotdrop = 1; +- return 0; ++ * can't. Hence, no choice but to drop. ++ */ ++ duprintf("ipt_multiport:" ++ " Dropping evil offset=0 tinygram.\n"); ++ *hotdrop = 1; ++ return 0; + } + +- /* Must not be a fragment. */ +- return !offset +- && ports_match(multiinfo->ports, +- multiinfo->flags, multiinfo->count, +- ntohs(udp->source), ntohs(udp->dest)); ++ return ports_match_v1(multiinfo, ntohs(pptr[0]), ntohs(pptr[1])); + } + +-/* Called when user tries to insert an entry of this type. */ + static int +-checkentry(const char *tablename, +- const struct ipt_ip *ip, +- void *matchinfo, +- unsigned int matchsize, +- unsigned int hook_mask) ++checkentry_v1(const char *tablename, ++ const struct ipt_ip *ip, ++ void *matchinfo, ++ unsigned int matchsize, ++ unsigned int hook_mask) + { +- const struct ipt_multiport *multiinfo = matchinfo; +- +- if (matchsize != IPT_ALIGN(sizeof(struct ipt_multiport))) +- return 0; +- +- /* Must specify proto == TCP/UDP, no unknown flags or bad count */ +- return (ip->proto == IPPROTO_TCP || ip->proto == IPPROTO_UDP) +- && !(ip->invflags & IPT_INV_PROTO) +- && matchsize == IPT_ALIGN(sizeof(struct ipt_multiport)) +- && (multiinfo->flags == IPT_MULTIPORT_SOURCE +- || multiinfo->flags == IPT_MULTIPORT_DESTINATION +- || multiinfo->flags == IPT_MULTIPORT_EITHER) +- && multiinfo->count <= IPT_MULTI_PORTS; ++ return (matchsize == IPT_ALIGN(sizeof(struct ipt_multiport_v1))); + } + +-static struct ipt_match multiport_match +-= { { NULL, NULL }, "multiport", &match, &checkentry, NULL, THIS_MODULE }; ++static struct ipt_match multiport_match_v1 = { ++ .name = "multiport", ++ .match = &match_v1, ++ .checkentry = &checkentry_v1, ++ .me = THIS_MODULE, ++}; + + static int __init init(void) + { +- return ipt_register_match(&multiport_match); ++ int err; ++ ++ err = ipt_register_match(&multiport_match_v1); ++ ++ return err; + } + + static void __exit fini(void) + { +- ipt_unregister_match(&multiport_match); ++ ipt_unregister_match(&multiport_match_v1); + } + + module_init(init); + module_exit(fini); +-MODULE_LICENSE("GPL");