diff options
Diffstat (limited to 'net/ipv6/netfilter/ip6t_rt.c')
-rw-r--r-- | net/ipv6/netfilter/ip6t_rt.c | 134 |
1 files changed, 65 insertions, 69 deletions
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c index 81ab00d8c182..357cea703bd9 100644 --- a/net/ipv6/netfilter/ip6t_rt.c +++ b/net/ipv6/netfilter/ip6t_rt.c @@ -24,25 +24,19 @@ MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("IPv6 RT match"); MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>"); -#if 0 -#define DEBUGP printk -#else -#define DEBUGP(format, args...) -#endif - /* Returns 1 if the id is matched by the range, 0 otherwise */ -static inline int -segsleft_match(u_int32_t min, u_int32_t max, u_int32_t id, int invert) +static inline bool +segsleft_match(u_int32_t min, u_int32_t max, u_int32_t id, bool invert) { - int r = 0; - DEBUGP("rt segsleft_match:%c 0x%x <= 0x%x <= 0x%x", - invert ? '!' : ' ', min, id, max); + bool r; + pr_debug("rt segsleft_match:%c 0x%x <= 0x%x <= 0x%x", + invert ? '!' : ' ', min, id, max); r = (id >= min && id <= max) ^ invert; - DEBUGP(" result %s\n", r ? "PASS" : "FAILED"); + pr_debug(" result %s\n", r ? "PASS" : "FAILED"); return r; } -static int +static bool match(const struct sk_buff *skb, const struct net_device *in, const struct net_device *out, @@ -50,59 +44,61 @@ match(const struct sk_buff *skb, const void *matchinfo, int offset, unsigned int protoff, - int *hotdrop) + bool *hotdrop) { - struct ipv6_rt_hdr _route, *rh; + struct ipv6_rt_hdr _route; + const struct ipv6_rt_hdr *rh; const struct ip6t_rt *rtinfo = matchinfo; unsigned int temp; unsigned int ptr; unsigned int hdrlen = 0; - unsigned int ret = 0; - struct in6_addr *ap, _addr; + bool ret = false; + struct in6_addr _addr; + const struct in6_addr *ap; int err; err = ipv6_find_hdr(skb, &ptr, NEXTHDR_ROUTING, NULL); if (err < 0) { if (err != -ENOENT) - *hotdrop = 1; - return 0; + *hotdrop = true; + return false; } rh = skb_header_pointer(skb, ptr, sizeof(_route), &_route); if (rh == NULL) { - *hotdrop = 1; - return 0; + *hotdrop = true; + return false; } hdrlen = ipv6_optlen(rh); if (skb->len - ptr < hdrlen) { /* Pcket smaller than its length field */ - return 0; + return false; } - DEBUGP("IPv6 RT LEN %u %u ", hdrlen, rh->hdrlen); - DEBUGP("TYPE %04X ", rh->type); - DEBUGP("SGS_LEFT %u %02X\n", rh->segments_left, rh->segments_left); - - DEBUGP("IPv6 RT segsleft %02X ", - (segsleft_match(rtinfo->segsleft[0], rtinfo->segsleft[1], - rh->segments_left, - !!(rtinfo->invflags & IP6T_RT_INV_SGS)))); - DEBUGP("type %02X %02X %02X ", - rtinfo->rt_type, rh->type, - (!(rtinfo->flags & IP6T_RT_TYP) || - ((rtinfo->rt_type == rh->type) ^ - !!(rtinfo->invflags & IP6T_RT_INV_TYP)))); - DEBUGP("len %02X %04X %02X ", - rtinfo->hdrlen, hdrlen, - (!(rtinfo->flags & IP6T_RT_LEN) || - ((rtinfo->hdrlen == hdrlen) ^ - !!(rtinfo->invflags & IP6T_RT_INV_LEN)))); - DEBUGP("res %02X %02X %02X ", - (rtinfo->flags & IP6T_RT_RES), - ((struct rt0_hdr *)rh)->reserved, - !((rtinfo->flags & IP6T_RT_RES) && - (((struct rt0_hdr *)rh)->reserved))); + pr_debug("IPv6 RT LEN %u %u ", hdrlen, rh->hdrlen); + pr_debug("TYPE %04X ", rh->type); + pr_debug("SGS_LEFT %u %02X\n", rh->segments_left, rh->segments_left); + + pr_debug("IPv6 RT segsleft %02X ", + segsleft_match(rtinfo->segsleft[0], rtinfo->segsleft[1], + rh->segments_left, + !!(rtinfo->invflags & IP6T_RT_INV_SGS))); + pr_debug("type %02X %02X %02X ", + rtinfo->rt_type, rh->type, + (!(rtinfo->flags & IP6T_RT_TYP) || + ((rtinfo->rt_type == rh->type) ^ + !!(rtinfo->invflags & IP6T_RT_INV_TYP)))); + pr_debug("len %02X %04X %02X ", + rtinfo->hdrlen, hdrlen, + !(rtinfo->flags & IP6T_RT_LEN) || + ((rtinfo->hdrlen == hdrlen) ^ + !!(rtinfo->invflags & IP6T_RT_INV_LEN))); + pr_debug("res %02X %02X %02X ", + rtinfo->flags & IP6T_RT_RES, + ((const struct rt0_hdr *)rh)->reserved, + !((rtinfo->flags & IP6T_RT_RES) && + (((const struct rt0_hdr *)rh)->reserved))); ret = (rh != NULL) && @@ -129,18 +125,18 @@ match(const struct sk_buff *skb, ret = (*rp == 0); } - DEBUGP("#%d ", rtinfo->addrnr); + pr_debug("#%d ", rtinfo->addrnr); if (!(rtinfo->flags & IP6T_RT_FST)) { return ret; } else if (rtinfo->flags & IP6T_RT_FST_NSTRICT) { - DEBUGP("Not strict "); + pr_debug("Not strict "); if (rtinfo->addrnr > (unsigned int)((hdrlen - 8) / 16)) { - DEBUGP("There isn't enough space\n"); - return 0; + pr_debug("There isn't enough space\n"); + return false; } else { unsigned int i = 0; - DEBUGP("#%d ", rtinfo->addrnr); + pr_debug("#%d ", rtinfo->addrnr); for (temp = 0; temp < (unsigned int)((hdrlen - 8) / 16); temp++) { @@ -154,25 +150,25 @@ match(const struct sk_buff *skb, BUG_ON(ap == NULL); if (ipv6_addr_equal(ap, &rtinfo->addrs[i])) { - DEBUGP("i=%d temp=%d;\n", i, temp); + pr_debug("i=%d temp=%d;\n", i, temp); i++; } if (i == rtinfo->addrnr) break; } - DEBUGP("i=%d #%d\n", i, rtinfo->addrnr); + pr_debug("i=%d #%d\n", i, rtinfo->addrnr); if (i == rtinfo->addrnr) return ret; else - return 0; + return false; } } else { - DEBUGP("Strict "); + pr_debug("Strict "); if (rtinfo->addrnr > (unsigned int)((hdrlen - 8) / 16)) { - DEBUGP("There isn't enough space\n"); - return 0; + pr_debug("There isn't enough space\n"); + return false; } else { - DEBUGP("#%d ", rtinfo->addrnr); + pr_debug("#%d ", rtinfo->addrnr); for (temp = 0; temp < rtinfo->addrnr; temp++) { ap = skb_header_pointer(skb, ptr @@ -185,20 +181,20 @@ match(const struct sk_buff *skb, if (!ipv6_addr_equal(ap, &rtinfo->addrs[temp])) break; } - DEBUGP("temp=%d #%d\n", temp, rtinfo->addrnr); - if ((temp == rtinfo->addrnr) && - (temp == (unsigned int)((hdrlen - 8) / 16))) + pr_debug("temp=%d #%d\n", temp, rtinfo->addrnr); + if (temp == rtinfo->addrnr && + temp == (unsigned int)((hdrlen - 8) / 16)) return ret; else - return 0; + return false; } } - return 0; + return false; } /* Called when user tries to insert an entry of this type. */ -static int +static bool checkentry(const char *tablename, const void *entry, const struct xt_match *match, @@ -208,21 +204,21 @@ checkentry(const char *tablename, const struct ip6t_rt *rtinfo = matchinfo; if (rtinfo->invflags & ~IP6T_RT_INV_MASK) { - DEBUGP("ip6t_rt: unknown flags %X\n", rtinfo->invflags); - return 0; + pr_debug("ip6t_rt: unknown flags %X\n", rtinfo->invflags); + return false; } if ((rtinfo->flags & (IP6T_RT_RES | IP6T_RT_FST_MASK)) && (!(rtinfo->flags & IP6T_RT_TYP) || (rtinfo->rt_type != 0) || (rtinfo->invflags & IP6T_RT_INV_TYP))) { - DEBUGP("`--rt-type 0' required before `--rt-0-*'"); - return 0; + pr_debug("`--rt-type 0' required before `--rt-0-*'"); + return false; } - return 1; + return true; } -static struct xt_match rt_match = { +static struct xt_match rt_match __read_mostly = { .name = "rt", .family = AF_INET6, .match = match, |