void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, u32 info, u8 *payload) { struct sock_exterr_skb *serr; skb = skb_clone(skb, GFP_ATOMIC); if (!skb) return; serr = SKB_EXT_ERR(skb); serr->ee.ee_errno = err; serr->ee.ee_origin = SO_EE_ORIGIN_ICMP; serr->ee.ee_type = icmp_hdr(skb)->type; serr->ee.ee_code = icmp_hdr(skb)->code; serr->ee.ee_pad = 0; serr->ee.ee_info = info; serr->ee.ee_data = 0; serr->addr_offset = (u8 *)&(((struct iphdr *)(icmp_hdr(skb) + 1))->daddr) - skb_network_header(skb); serr->port = port; if (skb_pull(skb, payload - skb->data)) { skb_reset_transport_header(skb); if (sock_queue_err_skb(sk, skb) == 0) return; } kfree_skb(skb); }
void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, u32 info, u8 *payload) { struct ipv6_pinfo *np = inet6_sk(sk); struct icmp6hdr *icmph = icmp6_hdr(skb); struct sock_exterr_skb *serr; if (!np->recverr) return; skb = skb_clone(skb, GFP_ATOMIC); if (!skb) return; skb->protocol = htons(ETH_P_IPV6); serr = SKB_EXT_ERR(skb); serr->ee.ee_errno = err; serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; serr->ee.ee_type = icmph->icmp6_type; serr->ee.ee_code = icmph->icmp6_code; serr->ee.ee_pad = 0; serr->ee.ee_info = info; serr->ee.ee_data = 0; serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - skb_network_header(skb); serr->port = port; __skb_pull(skb, payload - skb->data); skb_reset_transport_header(skb); if (sock_queue_err_skb(sk, skb)) kfree_skb(skb); }
/* * Handle MSG_ERRQUEUE */ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) { struct ipv6_pinfo *np = inet6_sk(sk); struct sock_exterr_skb *serr; struct sk_buff *skb, *skb2; struct sockaddr_in6 *sin; struct { struct sock_extended_err ee; struct sockaddr_in6 offender; } errhdr; int err; int copied; err = -EAGAIN; skb = skb_dequeue(&sk->sk_error_queue); if (skb == NULL) goto out; copied = skb->len; if (copied > len) { msg->msg_flags |= MSG_TRUNC; copied = len; } err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); if (err) goto out_free_skb; sock_recv_timestamp(msg, sk, skb); serr = SKB_EXT_ERR(skb); sin = (struct sockaddr_in6 *)msg->msg_name; if (sin) { const unsigned char *nh = skb_network_header(skb); sin->sin6_family = AF_INET6; sin->sin6_flowinfo = 0; sin->sin6_port = serr->port; if (skb->protocol == htons(ETH_P_IPV6)) { const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset), struct ipv6hdr, daddr); sin->sin6_addr = ip6h->daddr; if (np->sndflow) sin->sin6_flowinfo = ip6_flowinfo(ip6h); sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr, IP6CB(skb)->iif); } else { ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), &sin->sin6_addr); sin->sin6_scope_id = 0; } *addr_len = sizeof(*sin); }
void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info) { struct ipv6_pinfo *np = inet6_sk(sk); struct sock_exterr_skb *serr; struct ipv6hdr *iph; struct sk_buff *skb; if (!np->recverr) return; skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); if (!skb) return; skb->protocol = htons(ETH_P_IPV6); skb_put(skb, sizeof(struct ipv6hdr)); skb_reset_network_header(skb); iph = ipv6_hdr(skb); iph->daddr = fl6->daddr; serr = SKB_EXT_ERR(skb); serr->ee.ee_errno = err; serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; serr->ee.ee_type = 0; serr->ee.ee_code = 0; serr->ee.ee_pad = 0; serr->ee.ee_info = info; serr->ee.ee_data = 0; serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); serr->port = fl6->fl6_dport; __skb_pull(skb, skb_tail_pointer(skb) - skb->data); skb_reset_transport_header(skb); if (sock_queue_err_skb(sk, skb)) kfree_skb(skb); }
void skb_complete_tx_timestamp(struct sk_buff *skb, struct skb_shared_hwtstamps *hwtstamps) { struct sock *sk = skb->sk; struct sock_exterr_skb *serr; int err; if (!hwtstamps) { sock_put(sk); kfree_skb(skb); return; } *skb_hwtstamps(skb) = *hwtstamps; serr = SKB_EXT_ERR(skb); memset(serr, 0, sizeof(*serr)); serr->ee.ee_errno = ENOMSG; serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING; skb->sk = NULL; err = sock_queue_err_skb(sk, skb); sock_put(sk); if (err) kfree_skb(skb); }
void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 port, u32 info) { struct inet_sock *inet = inet_sk(sk); struct sock_exterr_skb *serr; struct iphdr *iph; struct sk_buff *skb; if (!inet->recverr) return; skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC); if (!skb) return; skb_put(skb, sizeof(struct iphdr)); skb_reset_network_header(skb); iph = ip_hdr(skb); iph->daddr = daddr; serr = SKB_EXT_ERR(skb); serr->ee.ee_errno = err; serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; serr->ee.ee_type = 0; serr->ee.ee_code = 0; serr->ee.ee_pad = 0; serr->ee.ee_info = info; serr->ee.ee_data = 0; serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); serr->port = port; __skb_pull(skb, skb_tail_pointer(skb) - skb->data); skb_reset_transport_header(skb); if (sock_queue_err_skb(sk, skb)) kfree_skb(skb); }
/* * handle an error received on the local endpoint */ void rxrpc_UDP_error_report(struct sock *sk) { struct sock_exterr_skb *serr; struct rxrpc_transport *trans; struct rxrpc_local *local = sk->sk_user_data; struct rxrpc_peer *peer; struct sk_buff *skb; __be32 addr; __be16 port; _enter("%p{%d}", sk, local->debug_id); skb = skb_dequeue(&sk->sk_error_queue); if (!skb) { _leave("UDP socket errqueue empty"); return; } rxrpc_new_skb(skb); serr = SKB_EXT_ERR(skb); addr = *(__be32 *)(skb_network_header(skb) + serr->addr_offset); port = serr->port; _net("Rx UDP Error from "NIPQUAD_FMT":%hu", NIPQUAD(addr), ntohs(port)); _debug("Msg l:%d d:%d", skb->len, skb->data_len); peer = rxrpc_find_peer(local, addr, port); if (IS_ERR(peer)) { rxrpc_free_skb(skb); _leave(" [no peer]"); return; } trans = rxrpc_find_transport(local, peer); if (!trans) { rxrpc_put_peer(peer); rxrpc_free_skb(skb); _leave(" [no trans]"); return; } if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP && serr->ee.ee_type == ICMP_DEST_UNREACH && serr->ee.ee_code == ICMP_FRAG_NEEDED ) { u32 mtu = serr->ee.ee_info; _net("Rx Received ICMP Fragmentation Needed (%d)", mtu); /* wind down the local interface MTU */ if (mtu > 0 && peer->if_mtu == 65535 && mtu < peer->if_mtu) { peer->if_mtu = mtu; _net("I/F MTU %u", mtu); } /* ip_rt_frag_needed() may have eaten the info */ if (mtu == 0) mtu = ntohs(icmp_hdr(skb)->un.frag.mtu); if (mtu == 0) { /* they didn't give us a size, estimate one */ if (mtu > 1500) { mtu >>= 1; if (mtu < 1500) mtu = 1500; } else {
/* * Handle MSG_ERRQUEUE */ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) { struct sock_exterr_skb *serr; struct sk_buff *skb; DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); struct { struct sock_extended_err ee; struct sockaddr_in offender; } errhdr; int err; int copied; WARN_ON_ONCE(sk->sk_family == AF_INET6); err = -EAGAIN; skb = sock_dequeue_err_skb(sk); if (!skb) goto out; copied = skb->len; if (copied > len) { msg->msg_flags |= MSG_TRUNC; copied = len; } err = skb_copy_datagram_msg(skb, 0, msg, copied); if (unlikely(err)) { kfree_skb(skb); return err; } sock_recv_timestamp(msg, sk, skb); serr = SKB_EXT_ERR(skb); if (sin && ipv4_datagram_support_addr(serr)) { sin->sin_family = AF_INET; sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) + serr->addr_offset); sin->sin_port = serr->port; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); *addr_len = sizeof(*sin); } memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); sin = &errhdr.offender; memset(sin, 0, sizeof(*sin)); if (ipv4_datagram_support_cmsg(sk, skb, serr->ee.ee_origin)) { sin->sin_family = AF_INET; sin->sin_addr.s_addr = ip_hdr(skb)->saddr; if (inet_sk(sk)->cmsg_flags) ip_cmsg_recv(msg, skb); } put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr); /* Now we could try to dump offended packet options */ msg->msg_flags |= MSG_ERRQUEUE; err = copied; consume_skb(skb); out: return err; }
/* * Find the peer associated with an ICMP packet. */ static struct rxrpc_peer *rxrpc_lookup_peer_icmp_rcu(struct rxrpc_local *local, const struct sk_buff *skb) { struct sock_exterr_skb *serr = SKB_EXT_ERR(skb); struct sockaddr_rxrpc srx; _enter(""); memset(&srx, 0, sizeof(srx)); srx.transport_type = local->srx.transport_type; srx.transport_len = local->srx.transport_len; srx.transport.family = local->srx.transport.family; /* Can we see an ICMP4 packet on an ICMP6 listening socket? and vice * versa? */ switch (srx.transport.family) { case AF_INET: srx.transport.sin.sin_port = serr->port; switch (serr->ee.ee_origin) { case SO_EE_ORIGIN_ICMP: _net("Rx ICMP"); memcpy(&srx.transport.sin.sin_addr, skb_network_header(skb) + serr->addr_offset, sizeof(struct in_addr)); break; case SO_EE_ORIGIN_ICMP6: _net("Rx ICMP6 on v4 sock"); memcpy(&srx.transport.sin.sin_addr, skb_network_header(skb) + serr->addr_offset + 12, sizeof(struct in_addr)); break; default: memcpy(&srx.transport.sin.sin_addr, &ip_hdr(skb)->saddr, sizeof(struct in_addr)); break; } break; #ifdef CONFIG_AF_RXRPC_IPV6 case AF_INET6: srx.transport.sin6.sin6_port = serr->port; switch (serr->ee.ee_origin) { case SO_EE_ORIGIN_ICMP6: _net("Rx ICMP6"); memcpy(&srx.transport.sin6.sin6_addr, skb_network_header(skb) + serr->addr_offset, sizeof(struct in6_addr)); break; case SO_EE_ORIGIN_ICMP: _net("Rx ICMP on v6 sock"); srx.transport.sin6.sin6_addr.s6_addr32[0] = 0; srx.transport.sin6.sin6_addr.s6_addr32[1] = 0; srx.transport.sin6.sin6_addr.s6_addr32[2] = htonl(0xffff); memcpy(srx.transport.sin6.sin6_addr.s6_addr + 12, skb_network_header(skb) + serr->addr_offset, sizeof(struct in_addr)); break; default: memcpy(&srx.transport.sin6.sin6_addr, &ipv6_hdr(skb)->saddr, sizeof(struct in6_addr)); break; } break; #endif default: BUG(); } return rxrpc_lookup_peer_rcu(local, &srx); }
/* * Handle MSG_ERRQUEUE */ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) { struct sock_exterr_skb *serr; struct sk_buff *skb, *skb2; struct sockaddr_in *sin; struct { struct sock_extended_err ee; struct sockaddr_in offender; } errhdr; int err; int copied; err = -EAGAIN; skb = skb_dequeue(&sk->sk_error_queue); if (skb == NULL) goto out; copied = skb->len; if (copied > len) { msg->msg_flags |= MSG_TRUNC; copied = len; } err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); if (err) goto out_free_skb; sock_recv_timestamp(msg, sk, skb); serr = SKB_EXT_ERR(skb); sin = (struct sockaddr_in *)msg->msg_name; if (sin) { sin->sin_family = AF_INET; sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) + serr->addr_offset); sin->sin_port = serr->port; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); *addr_len = sizeof(*sin); } memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); sin = &errhdr.offender; sin->sin_family = AF_UNSPEC; if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) { struct inet_sock *inet = inet_sk(sk); sin->sin_family = AF_INET; sin->sin_addr.s_addr = ip_hdr(skb)->saddr; sin->sin_port = 0; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); if (inet->cmsg_flags) ip_cmsg_recv(msg, skb); } put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr); /* Now we could try to dump offended packet options */ msg->msg_flags |= MSG_ERRQUEUE; err = copied; /* Reset and regenerate socket error */ spin_lock_bh(&sk->sk_error_queue.lock); sk->sk_err = 0; skb2 = skb_peek(&sk->sk_error_queue); if (skb2 != NULL) { sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; spin_unlock_bh(&sk->sk_error_queue.lock); sk->sk_error_report(sk); } else spin_unlock_bh(&sk->sk_error_queue.lock); out_free_skb: kfree_skb(skb); out: return err; }
/* * Handle MSG_ERRQUEUE */ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len) { struct ipv6_pinfo *np = inet6_sk(sk); struct sock_exterr_skb *serr; struct sk_buff *skb, *skb2; struct sockaddr_in6 *sin; struct { struct sock_extended_err ee; struct sockaddr_in6 offender; } errhdr; int err; int copied; err = -EAGAIN; skb = skb_dequeue(&sk->sk_error_queue); if (skb == NULL) goto out; copied = skb->len; if (copied > len) { msg->msg_flags |= MSG_TRUNC; copied = len; } err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); if (err) goto out_free_skb; sock_recv_timestamp(msg, sk, skb); serr = SKB_EXT_ERR(skb); sin = (struct sockaddr_in6 *)msg->msg_name; if (sin) { const unsigned char *nh = skb_network_header(skb); sin->sin6_family = AF_INET6; sin->sin6_flowinfo = 0; sin->sin6_port = serr->port; sin->sin6_scope_id = 0; if (skb->protocol == htons(ETH_P_IPV6)) { ipv6_addr_copy(&sin->sin6_addr, (struct in6_addr *)(nh + serr->addr_offset)); if (np->sndflow) sin->sin6_flowinfo = (*(__be32 *)(nh + serr->addr_offset - 24) & IPV6_FLOWINFO_MASK); if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) sin->sin6_scope_id = IP6CB(skb)->iif; } else { ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), &sin->sin6_addr); } } memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); sin = &errhdr.offender; sin->sin6_family = AF_UNSPEC; if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) { sin->sin6_family = AF_INET6; sin->sin6_flowinfo = 0; sin->sin6_scope_id = 0; if (skb->protocol == htons(ETH_P_IPV6)) { ipv6_addr_copy(&sin->sin6_addr, &ipv6_hdr(skb)->saddr); if (np->rxopt.all) datagram_recv_ctl(sk, msg, skb); if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) sin->sin6_scope_id = IP6CB(skb)->iif; } else { struct inet_sock *inet = inet_sk(sk); ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, &sin->sin6_addr); if (inet->cmsg_flags) ip_cmsg_recv(msg, skb); } } put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); /* Now we could try to dump offended packet options */ msg->msg_flags |= MSG_ERRQUEUE; err = copied; /* Reset and regenerate socket error */ spin_lock_bh(&sk->sk_error_queue.lock); sk->sk_err = 0; if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) { sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; spin_unlock_bh(&sk->sk_error_queue.lock); sk->sk_error_report(sk); } else { spin_unlock_bh(&sk->sk_error_queue.lock); } out_free_skb: kfree_skb(skb); out: return err; }
void ip_local_error_notify(struct sock *sk, int sent, uint32_t IPdgramId, /* The following parameters are used to the client to sort packages */ u16 fragment_data_len, /* only data, no header */ u16 fragment_offset, u8 more_fragment, u8 retry_count) { struct inet_sock *inet = NULL; struct sock_exterr_skb *serr; struct iphdr *iph; struct sk_buff *skb; if (sk==NULL) { printk(KERN_WARNING "*** ABPS VIC *** ip_local_error_notify:" " struct sock sk is NULL\n"); return; } inet = inet_sk(sk); if (inet==NULL) { printk(KERN_WARNING "*** ABPS VIC *** ip_local_error_notify:" " struct inet_sock inet is NULL, bye\n"); return; } if (!inet->recverr) { return; } skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC); if (!skb) { printk(KERN_WARNING "*** ABPS VIC *** ip_local_error_notify:" " alloc failed, skb is NULL\n"); return; } skb_put(skb, sizeof(struct iphdr)); skb_reset_network_header(skb); iph = ip_hdr(skb); serr = SKB_EXT_ERR(skb); if (!serr) { printk(KERN_WARNING "*** ABPS VIC *** ip_local_error_notify:" " serr is NULL, bye\n"); return; } serr->ee.ee_errno = 0; /* success */ serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL_NOTIFY; serr->ee.ee_type = sent; /* 1 sent, 0 not sent */ serr->ee.ee_code = more_fragment; /* more fragment */ serr->ee.ee_pad = 0; serr->ee.ee_info = IPdgramId; /* id datagram */ serr->ee.ee_retry_count = retry_count; /* * 16 low order bit are offset, 16 high order bit are len * * I have to extract date in this way: * fragment_data_len = (((unsigned long int)v32)>>16); * fragment_offset = (((unsigned long int)v32)<<16)>>16; */ serr->ee.ee_data = fragment_offset + (((u32)fragment_data_len)<<16); __skb_pull(skb, skb_tail_pointer(skb) - skb->data); skb_reset_transport_header(skb); if (sock_queue_err_skb(sk, skb)) kfree_skb(skb); }