From 51e779f0daa5c712439d37b907d58543e4fcf12a Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 19 May 2008 07:18:10 +0200 Subject: mac80211: don't claim iwspy support We removed iwspy support a very long time ago because it is useless, but forgot to stop claiming to support it. Apparently, nobody cares, but remove it nonetheless. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/wext.c | 1 - 1 file changed, 1 deletion(-) (limited to 'net') diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c index 76e1de1dc73..457ebf9e85a 100644 --- a/net/mac80211/wext.c +++ b/net/mac80211/wext.c @@ -209,7 +209,6 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev, range->num_frequency = c; IW_EVENT_CAPA_SET_KERNEL(range->event_capa); - IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWTHRSPY); IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP); IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN); -- cgit v1.2.3-70-g09d2 From 0d580a774b3682b8b2b5c89ab9b813d149ef28e7 Mon Sep 17 00:00:00 2001 From: Helmut Schaa Date: Tue, 20 May 2008 09:56:37 +0200 Subject: mac80211: fix NULL pointer dereference in ieee80211_compatible_rates Fix a possible NULL pointer dereference in ieee80211_compatible_rates introduced in the patch "mac80211: fix association with some APs". If no bss is available just use all supported rates in the association request. Signed-off-by: Helmut Schaa Signed-off-by: John W. Linville --- net/mac80211/mlme.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) (limited to 'net') diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index e470bf12b76..7cfd12e0d1e 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -730,7 +730,17 @@ static void ieee80211_send_assoc(struct net_device *dev, if (bss->wmm_ie) { wmm = 1; } + + /* get all rates supported by the device and the AP as + * some APs don't like getting a superset of their rates + * in the association request (e.g. D-Link DAP 1353 in + * b-only mode) */ + rates_len = ieee80211_compatible_rates(bss, sband, &rates); + ieee80211_rx_bss_put(dev, bss); + } else { + rates = ~0; + rates_len = sband->n_bitrates; } mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); @@ -761,10 +771,7 @@ static void ieee80211_send_assoc(struct net_device *dev, *pos++ = ifsta->ssid_len; memcpy(pos, ifsta->ssid, ifsta->ssid_len); - /* all supported rates should be added here but some APs - * (e.g. D-Link DAP 1353 in b-only mode) don't like that - * Therefore only add rates the AP supports */ - rates_len = ieee80211_compatible_rates(bss, sband, &rates); + /* add all rates which were marked to be used above */ supp_rates_len = rates_len; if (supp_rates_len > 8) supp_rates_len = 8; -- cgit v1.2.3-70-g09d2 From 4da5105687e0993a3bbdcffd89b2b94d9377faab Mon Sep 17 00:00:00 2001 From: Kazunori MIYAZAWA Date: Wed, 21 May 2008 13:26:11 -0700 Subject: af_key: Fix selector family initialization. This propagates the xfrm_user fix made in commit bcf0dda8d2408fe1c1040cdec5a98e5fcad2ac72 ("[XFRM]: xfrm_user: fix selector family initialization") Based upon a bug report from, and tested by, Alan Swanson. Signed-off-by: Kazunori MIYAZAWA Signed-off-by: David S. Miller --- net/key/af_key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/key/af_key.c b/net/key/af_key.c index 9e7236ff6bc..9bba7ac5fee 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1251,7 +1251,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, x->sel.prefixlen_s = addr->sadb_address_prefixlen; } - if (x->props.mode == XFRM_MODE_TRANSPORT) + if (!x->sel.family) x->sel.family = x->props.family; if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { -- cgit v1.2.3-70-g09d2 From 7d227cd235c809c36c847d6a597956ad9e9d2bae Mon Sep 17 00:00:00 2001 From: Sridhar Samudrala Date: Wed, 21 May 2008 16:42:20 -0700 Subject: tcp: TCP connection times out if ICMP frag needed is delayed We are seeing an issue with TCP in handling an ICMP frag needed message that is received after net.ipv4.tcp_retries1 retransmits. The default value of retries1 is 3. So if the path mtu changes and ICMP frag needed is lost for the first 3 retransmits or if it gets delayed until 3 retransmits are done, TCP doesn't update MSS correctly and continues to retransmit the orginal message until it timesout after tcp_retries2 retransmits. I am seeing this issue even with the latest 2.6.25.4 kernel. In tcp_retransmit_timer(), when retransmits counter exceeds tcp_retries1 value, the dst cache entry of the socket is reset. At this time, if we receive an ICMP frag needed message, the dst entry gets updated with the new MTU, but the TCP sockets dst_cache entry remains NULL. So the next time when we try to retransmit after the ICMP frag needed is received, tcp_retransmit_skb() gets called. Here the cur_mss value is calculated at the start of the routine with a NULL sk_dst_cache. Instead we should call tcp_current_mss after the rebuild_header that caches the dst entry with the updated mtu. Also the rebuild_header should be called before tcp_fragment so that skb is fragmented if the mss goes down. Signed-off-by: Sridhar Samudrala Signed-off-by: David S. Miller --- net/ipv4/tcp_output.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'net') diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index debf2358160..e399bde7813 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1836,7 +1836,7 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb) { struct tcp_sock *tp = tcp_sk(sk); struct inet_connection_sock *icsk = inet_csk(sk); - unsigned int cur_mss = tcp_current_mss(sk, 0); + unsigned int cur_mss; int err; /* Inconslusive MTU probe */ @@ -1858,6 +1858,11 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb) return -ENOMEM; } + if (inet_csk(sk)->icsk_af_ops->rebuild_header(sk)) + return -EHOSTUNREACH; /* Routing failure or similar. */ + + cur_mss = tcp_current_mss(sk, 0); + /* If receiver has shrunk his window, and skb is out of * new window, do not retransmit it. The exception is the * case, when window is shrunk to zero. In this case @@ -1884,9 +1889,6 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb) (sysctl_tcp_retrans_collapse != 0)) tcp_retrans_try_collapse(sk, skb, cur_mss); - if (inet_csk(sk)->icsk_af_ops->rebuild_header(sk)) - return -EHOSTUNREACH; /* Routing failure or similar. */ - /* Some Solaris stacks overoptimize and ignore the FIN on a * retransmit when old data is attached. So strip it off * since it is cheap to do so and saves bytes on the network. -- cgit v1.2.3-70-g09d2 From 51f82a2b128131c411880aed2cb802b166fe3445 Mon Sep 17 00:00:00 2001 From: Denis Cheng Date: Wed, 21 May 2008 17:34:32 -0700 Subject: net/ipv4/arp.c: Use common hex_asc helpers Here the local hexbuf is a duplicate of global const char hex_asc from lib/hexdump.c, except the hex letters' cases: const char hexbuf[] = "0123456789ABCDEF"; const char hex_asc[] = "0123456789abcdef"; and here to print HW addresses, the hex cases are not significant. Thanks to Harvey Harrison to introduce the hex_asc_hi/hex_asc_lo helpers. Signed-off-by: Denis Cheng Signed-off-by: Harvey Harrison Signed-off-by: David S. Miller --- net/ipv4/arp.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'net') diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 418862f1bf2..9b539fa9fe1 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -1288,7 +1288,6 @@ static void arp_format_neigh_entry(struct seq_file *seq, struct neighbour *n) { char hbuffer[HBUFFERLEN]; - const char hexbuf[] = "0123456789ABCDEF"; int k, j; char tbuf[16]; struct net_device *dev = n->dev; @@ -1302,8 +1301,8 @@ static void arp_format_neigh_entry(struct seq_file *seq, else { #endif for (k = 0, j = 0; k < HBUFFERLEN - 3 && j < dev->addr_len; j++) { - hbuffer[k++] = hexbuf[(n->ha[j] >> 4) & 15]; - hbuffer[k++] = hexbuf[n->ha[j] & 15]; + hbuffer[k++] = hex_asc_hi(n->ha[j]); + hbuffer[k++] = hex_asc_lo(n->ha[j]); hbuffer[k++] = ':'; } hbuffer[--k] = 0; -- cgit v1.2.3-70-g09d2 From 88860c9ef45963eb69411b0d2ace4e8ba0f7a32f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 21 May 2008 17:36:21 -0700 Subject: xfrm_user: Remove zero length key checks. The crypto layer will determine whether that is valid or not. Suggested by Herbert Xu, based upon a report and patch by Martin Willi. Signed-off-by: David S. Miller Acked-by: Herbert Xu --- net/xfrm/xfrm_user.c | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'net') diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index a1b0fbe3ea3..b976d9ed10e 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -50,19 +50,8 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) switch (type) { case XFRMA_ALG_AUTH: - if (!algp->alg_key_len && - strcmp(algp->alg_name, "digest_null") != 0) - return -EINVAL; - break; - case XFRMA_ALG_CRYPT: - if (!algp->alg_key_len && - strcmp(algp->alg_name, "cipher_null") != 0) - return -EINVAL; - break; - case XFRMA_ALG_COMP: - /* Zero length keys are legal. */ break; default: -- cgit v1.2.3-70-g09d2 From 071f92d05967a0c8422f1c8587ce0b4d90a8b447 Mon Sep 17 00:00:00 2001 From: Rami Rosen Date: Wed, 21 May 2008 17:47:54 -0700 Subject: net: The world is not perfect patch. Unless there will be any objection here, I suggest consider the following patch which simply removes the code for the -DI_WISH_WORLD_WERE_PERFECT in the three methods which use it. The compilation errors we get when using -DI_WISH_WORLD_WERE_PERFECT show that this code was not built and not used for really a long time. Signed-off-by: Rami Rosen Signed-off-by: David S. Miller --- net/ipv4/ip_gre.c | 146 +----------------------------------------------------- net/ipv4/ipip.c | 130 +----------------------------------------------- net/ipv6/sit.c | 89 +-------------------------------- 3 files changed, 3 insertions(+), 362 deletions(-) (limited to 'net') diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 2ada033406d..4342cba4ff8 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -313,9 +313,8 @@ static void ipgre_tunnel_uninit(struct net_device *dev) static void ipgre_err(struct sk_buff *skb, u32 info) { -#ifndef I_WISH_WORLD_WERE_PERFECT -/* It is not :-( All the routers (except for Linux) return only +/* All the routers (except for Linux) return only 8 bytes of packet payload. It means, that precise relaying of ICMP in the real Internet is absolutely infeasible. @@ -398,149 +397,6 @@ static void ipgre_err(struct sk_buff *skb, u32 info) out: read_unlock(&ipgre_lock); return; -#else - struct iphdr *iph = (struct iphdr*)dp; - struct iphdr *eiph; - __be16 *p = (__be16*)(dp+(iph->ihl<<2)); - const int type = icmp_hdr(skb)->type; - const int code = icmp_hdr(skb)->code; - int rel_type = 0; - int rel_code = 0; - __be32 rel_info = 0; - __u32 n = 0; - __be16 flags; - int grehlen = (iph->ihl<<2) + 4; - struct sk_buff *skb2; - struct flowi fl; - struct rtable *rt; - - if (p[1] != htons(ETH_P_IP)) - return; - - flags = p[0]; - if (flags&(GRE_CSUM|GRE_KEY|GRE_SEQ|GRE_ROUTING|GRE_VERSION)) { - if (flags&(GRE_VERSION|GRE_ROUTING)) - return; - if (flags&GRE_CSUM) - grehlen += 4; - if (flags&GRE_KEY) - grehlen += 4; - if (flags&GRE_SEQ) - grehlen += 4; - } - if (len < grehlen + sizeof(struct iphdr)) - return; - eiph = (struct iphdr*)(dp + grehlen); - - switch (type) { - default: - return; - case ICMP_PARAMETERPROB: - n = ntohl(icmp_hdr(skb)->un.gateway) >> 24; - if (n < (iph->ihl<<2)) - return; - - /* So... This guy found something strange INSIDE encapsulated - packet. Well, he is fool, but what can we do ? - */ - rel_type = ICMP_PARAMETERPROB; - n -= grehlen; - rel_info = htonl(n << 24); - break; - - case ICMP_DEST_UNREACH: - switch (code) { - case ICMP_SR_FAILED: - case ICMP_PORT_UNREACH: - /* Impossible event. */ - return; - case ICMP_FRAG_NEEDED: - /* And it is the only really necessary thing :-) */ - n = ntohs(icmp_hdr(skb)->un.frag.mtu); - if (n < grehlen+68) - return; - n -= grehlen; - /* BSD 4.2 MORE DOES NOT EXIST IN NATURE. */ - if (n > ntohs(eiph->tot_len)) - return; - rel_info = htonl(n); - break; - default: - /* All others are translated to HOST_UNREACH. - rfc2003 contains "deep thoughts" about NET_UNREACH, - I believe, it is just ether pollution. --ANK - */ - rel_type = ICMP_DEST_UNREACH; - rel_code = ICMP_HOST_UNREACH; - break; - } - break; - case ICMP_TIME_EXCEEDED: - if (code != ICMP_EXC_TTL) - return; - break; - } - - /* Prepare fake skb to feed it to icmp_send */ - skb2 = skb_clone(skb, GFP_ATOMIC); - if (skb2 == NULL) - return; - dst_release(skb2->dst); - skb2->dst = NULL; - skb_pull(skb2, skb->data - (u8*)eiph); - skb_reset_network_header(skb2); - - /* Try to guess incoming interface */ - memset(&fl, 0, sizeof(fl)); - fl.fl4_dst = eiph->saddr; - fl.fl4_tos = RT_TOS(eiph->tos); - fl.proto = IPPROTO_GRE; - if (ip_route_output_key(dev_net(skb->dev), &rt, &fl)) { - kfree_skb(skb2); - return; - } - skb2->dev = rt->u.dst.dev; - - /* route "incoming" packet */ - if (rt->rt_flags&RTCF_LOCAL) { - ip_rt_put(rt); - rt = NULL; - fl.fl4_dst = eiph->daddr; - fl.fl4_src = eiph->saddr; - fl.fl4_tos = eiph->tos; - if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) || - rt->u.dst.dev->type != ARPHRD_IPGRE) { - ip_rt_put(rt); - kfree_skb(skb2); - return; - } - } else { - ip_rt_put(rt); - if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, skb2->dev) || - skb2->dst->dev->type != ARPHRD_IPGRE) { - kfree_skb(skb2); - return; - } - } - - /* change mtu on this route */ - if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { - if (n > dst_mtu(skb2->dst)) { - kfree_skb(skb2); - return; - } - skb2->dst->ops->update_pmtu(skb2->dst, n); - } else if (type == ICMP_TIME_EXCEEDED) { - struct ip_tunnel *t = netdev_priv(skb2->dev); - if (t->parms.iph.ttl) { - rel_type = ICMP_DEST_UNREACH; - rel_code = ICMP_HOST_UNREACH; - } - } - - icmp_send(skb2, rel_type, rel_code, rel_info); - kfree_skb(skb2); -#endif } static inline void ipgre_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb) diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 149111f08e8..af5cb53da5c 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -278,9 +278,8 @@ static void ipip_tunnel_uninit(struct net_device *dev) static int ipip_err(struct sk_buff *skb, u32 info) { -#ifndef I_WISH_WORLD_WERE_PERFECT -/* It is not :-( All the routers (except for Linux) return only +/* All the routers (except for Linux) return only 8 bytes of packet payload. It means, that precise relaying of ICMP in the real Internet is absolutely infeasible. */ @@ -337,133 +336,6 @@ static int ipip_err(struct sk_buff *skb, u32 info) out: read_unlock(&ipip_lock); return err; -#else - struct iphdr *iph = (struct iphdr*)dp; - int hlen = iph->ihl<<2; - struct iphdr *eiph; - const int type = icmp_hdr(skb)->type; - const int code = icmp_hdr(skb)->code; - int rel_type = 0; - int rel_code = 0; - __be32 rel_info = 0; - __u32 n = 0; - struct sk_buff *skb2; - struct flowi fl; - struct rtable *rt; - - if (len < hlen + sizeof(struct iphdr)) - return 0; - eiph = (struct iphdr*)(dp + hlen); - - switch (type) { - default: - return 0; - case ICMP_PARAMETERPROB: - n = ntohl(icmp_hdr(skb)->un.gateway) >> 24; - if (n < hlen) - return 0; - - /* So... This guy found something strange INSIDE encapsulated - packet. Well, he is fool, but what can we do ? - */ - rel_type = ICMP_PARAMETERPROB; - rel_info = htonl((n - hlen) << 24); - break; - - case ICMP_DEST_UNREACH: - switch (code) { - case ICMP_SR_FAILED: - case ICMP_PORT_UNREACH: - /* Impossible event. */ - return 0; - case ICMP_FRAG_NEEDED: - /* And it is the only really necessary thing :-) */ - n = ntohs(icmp_hdr(skb)->un.frag.mtu); - if (n < hlen+68) - return 0; - n -= hlen; - /* BSD 4.2 MORE DOES NOT EXIST IN NATURE. */ - if (n > ntohs(eiph->tot_len)) - return 0; - rel_info = htonl(n); - break; - default: - /* All others are translated to HOST_UNREACH. - rfc2003 contains "deep thoughts" about NET_UNREACH, - I believe, it is just ether pollution. --ANK - */ - rel_type = ICMP_DEST_UNREACH; - rel_code = ICMP_HOST_UNREACH; - break; - } - break; - case ICMP_TIME_EXCEEDED: - if (code != ICMP_EXC_TTL) - return 0; - break; - } - - /* Prepare fake skb to feed it to icmp_send */ - skb2 = skb_clone(skb, GFP_ATOMIC); - if (skb2 == NULL) - return 0; - dst_release(skb2->dst); - skb2->dst = NULL; - skb_pull(skb2, skb->data - (u8*)eiph); - skb_reset_network_header(skb2); - - /* Try to guess incoming interface */ - memset(&fl, 0, sizeof(fl)); - fl.fl4_daddr = eiph->saddr; - fl.fl4_tos = RT_TOS(eiph->tos); - fl.proto = IPPROTO_IPIP; - if (ip_route_output_key(dev_net(skb->dev), &rt, &key)) { - kfree_skb(skb2); - return 0; - } - skb2->dev = rt->u.dst.dev; - - /* route "incoming" packet */ - if (rt->rt_flags&RTCF_LOCAL) { - ip_rt_put(rt); - rt = NULL; - fl.fl4_daddr = eiph->daddr; - fl.fl4_src = eiph->saddr; - fl.fl4_tos = eiph->tos; - if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) || - rt->u.dst.dev->type != ARPHRD_TUNNEL) { - ip_rt_put(rt); - kfree_skb(skb2); - return 0; - } - } else { - ip_rt_put(rt); - if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, skb2->dev) || - skb2->dst->dev->type != ARPHRD_TUNNEL) { - kfree_skb(skb2); - return 0; - } - } - - /* change mtu on this route */ - if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { - if (n > dst_mtu(skb2->dst)) { - kfree_skb(skb2); - return 0; - } - skb2->dst->ops->update_pmtu(skb2->dst, n); - } else if (type == ICMP_TIME_EXCEEDED) { - struct ip_tunnel *t = netdev_priv(skb2->dev); - if (t->parms.iph.ttl) { - rel_type = ICMP_DEST_UNREACH; - rel_code = ICMP_HOST_UNREACH; - } - } - - icmp_send(skb2, rel_type, rel_code, rel_info); - kfree_skb(skb2); - return 0; -#endif } static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph, diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 5a6fab95569..3de6ffdaedf 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -403,9 +403,8 @@ static void ipip6_tunnel_uninit(struct net_device *dev) static int ipip6_err(struct sk_buff *skb, u32 info) { -#ifndef I_WISH_WORLD_WERE_PERFECT -/* It is not :-( All the routers (except for Linux) return only +/* All the routers (except for Linux) return only 8 bytes of packet payload. It means, that precise relaying of ICMP in the real Internet is absolutely infeasible. */ @@ -462,92 +461,6 @@ static int ipip6_err(struct sk_buff *skb, u32 info) out: read_unlock(&ipip6_lock); return err; -#else - struct iphdr *iph = (struct iphdr*)dp; - int hlen = iph->ihl<<2; - struct ipv6hdr *iph6; - const int type = icmp_hdr(skb)->type; - const int code = icmp_hdr(skb)->code; - int rel_type = 0; - int rel_code = 0; - int rel_info = 0; - struct sk_buff *skb2; - struct rt6_info *rt6i; - - if (len < hlen + sizeof(struct ipv6hdr)) - return; - iph6 = (struct ipv6hdr*)(dp + hlen); - - switch (type) { - default: - return; - case ICMP_PARAMETERPROB: - if (icmp_hdr(skb)->un.gateway < hlen) - return; - - /* So... This guy found something strange INSIDE encapsulated - packet. Well, he is fool, but what can we do ? - */ - rel_type = ICMPV6_PARAMPROB; - rel_info = icmp_hdr(skb)->un.gateway - hlen; - break; - - case ICMP_DEST_UNREACH: - switch (code) { - case ICMP_SR_FAILED: - case ICMP_PORT_UNREACH: - /* Impossible event. */ - return; - case ICMP_FRAG_NEEDED: - /* Too complicated case ... */ - return; - default: - /* All others are translated to HOST_UNREACH. - rfc2003 contains "deep thoughts" about NET_UNREACH, - I believe, it is just ether pollution. --ANK - */ - rel_type = ICMPV6_DEST_UNREACH; - rel_code = ICMPV6_ADDR_UNREACH; - break; - } - break; - case ICMP_TIME_EXCEEDED: - if (code != ICMP_EXC_TTL) - return; - rel_type = ICMPV6_TIME_EXCEED; - rel_code = ICMPV6_EXC_HOPLIMIT; - break; - } - - /* Prepare fake skb to feed it to icmpv6_send */ - skb2 = skb_clone(skb, GFP_ATOMIC); - if (skb2 == NULL) - return 0; - dst_release(skb2->dst); - skb2->dst = NULL; - skb_pull(skb2, skb->data - (u8*)iph6); - skb_reset_network_header(skb2); - - /* Try to guess incoming interface */ - rt6i = rt6_lookup(dev_net(skb->dev), &iph6->saddr, NULL, NULL, 0); - if (rt6i && rt6i->rt6i_dev) { - skb2->dev = rt6i->rt6i_dev; - - rt6i = rt6_lookup(dev_net(skb->dev), - &iph6->daddr, &iph6->saddr, NULL, 0); - - if (rt6i && rt6i->rt6i_dev && rt6i->rt6i_dev->type == ARPHRD_SIT) { - struct ip_tunnel *t = netdev_priv(rt6i->rt6i_dev); - if (rel_type == ICMPV6_TIME_EXCEED && t->parms.iph.ttl) { - rel_type = ICMPV6_DEST_UNREACH; - rel_code = ICMPV6_ADDR_UNREACH; - } - icmpv6_send(skb2, rel_type, rel_code, rel_info, skb2->dev); - } - } - kfree_skb(skb2); - return 0; -#endif } static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb) -- cgit v1.2.3-70-g09d2