mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-19 09:59:04 +00:00
14c850212e
To help in reducing the number of include dependencies, several files were touched as they were getting needed headers indirectly for stuff they use. Thanks also to Alan Menegotto for pointing out that net/dccp/proto.c had linux/dccp.h include twice. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/* Kernel module to match AH parameters. */
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/* (C) 2001-2002 Andras Kis-Szabo <kisza@sch.bme.hu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/types.h>
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#include <net/checksum.h>
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#include <net/ipv6.h>
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#include <linux/netfilter_ipv6/ip6_tables.h>
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#include <linux/netfilter_ipv6/ip6t_ah.h>
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("IPv6 AH match");
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MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
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#if 0
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#define DEBUGP printk
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#else
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#define DEBUGP(format, args...)
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#endif
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/* Returns 1 if the spi is matched by the range, 0 otherwise */
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static inline int
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spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, int invert)
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{
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int r=0;
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DEBUGP("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",invert? '!':' ',
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min,spi,max);
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r = (spi >= min && spi <= max) ^ invert;
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DEBUGP(" result %s\n",r? "PASS\n" : "FAILED\n");
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return r;
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}
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static int
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match(const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const void *matchinfo,
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int offset,
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unsigned int protoff,
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int *hotdrop)
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{
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struct ip_auth_hdr *ah, _ah;
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const struct ip6t_ah *ahinfo = matchinfo;
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unsigned int ptr;
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unsigned int hdrlen = 0;
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if (ipv6_find_hdr(skb, &ptr, NEXTHDR_AUTH) < 0)
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return 0;
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ah = skb_header_pointer(skb, ptr, sizeof(_ah), &_ah);
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if (ah == NULL) {
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*hotdrop = 1;
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return 0;
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}
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hdrlen = (ah->hdrlen + 2) << 2;
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DEBUGP("IPv6 AH LEN %u %u ", hdrlen, ah->hdrlen);
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DEBUGP("RES %04X ", ah->reserved);
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DEBUGP("SPI %u %08X\n", ntohl(ah->spi), ntohl(ah->spi));
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DEBUGP("IPv6 AH spi %02X ",
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(spi_match(ahinfo->spis[0], ahinfo->spis[1],
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ntohl(ah->spi),
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!!(ahinfo->invflags & IP6T_AH_INV_SPI))));
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DEBUGP("len %02X %04X %02X ",
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ahinfo->hdrlen, hdrlen,
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(!ahinfo->hdrlen ||
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(ahinfo->hdrlen == hdrlen) ^
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!!(ahinfo->invflags & IP6T_AH_INV_LEN)));
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DEBUGP("res %02X %04X %02X\n",
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ahinfo->hdrres, ah->reserved,
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!(ahinfo->hdrres && ah->reserved));
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return (ah != NULL)
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&&
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(spi_match(ahinfo->spis[0], ahinfo->spis[1],
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ntohl(ah->spi),
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!!(ahinfo->invflags & IP6T_AH_INV_SPI)))
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&&
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(!ahinfo->hdrlen ||
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(ahinfo->hdrlen == hdrlen) ^
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!!(ahinfo->invflags & IP6T_AH_INV_LEN))
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&&
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!(ahinfo->hdrres && ah->reserved);
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}
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/* Called when user tries to insert an entry of this type. */
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static int
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checkentry(const char *tablename,
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const struct ip6t_ip6 *ip,
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void *matchinfo,
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unsigned int matchinfosize,
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unsigned int hook_mask)
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{
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const struct ip6t_ah *ahinfo = matchinfo;
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if (matchinfosize != IP6T_ALIGN(sizeof(struct ip6t_ah))) {
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DEBUGP("ip6t_ah: matchsize %u != %u\n",
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matchinfosize, IP6T_ALIGN(sizeof(struct ip6t_ah)));
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return 0;
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}
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if (ahinfo->invflags & ~IP6T_AH_INV_MASK) {
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DEBUGP("ip6t_ah: unknown flags %X\n", ahinfo->invflags);
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return 0;
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}
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return 1;
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}
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static struct ip6t_match ah_match = {
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.name = "ah",
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.match = &match,
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.checkentry = &checkentry,
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.me = THIS_MODULE,
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};
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static int __init init(void)
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{
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return ip6t_register_match(&ah_match);
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}
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static void __exit cleanup(void)
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{
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ip6t_unregister_match(&ah_match);
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}
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module_init(init);
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module_exit(cleanup);
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