mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 07:22:33 +00:00
142 lines
3.2 KiB
Diff
142 lines
3.2 KiB
Diff
packaging/utils/nattpatch 2.4
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--- a/include/net/sock.h
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+++ b/include/net/sock.h
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@@ -488,7 +488,13 @@ struct tcp_opt {
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} bictcp;
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};
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-
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+#if 1
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+#define UDP_OPT_IN_SOCK 1
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+struct udp_opt {
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+ __u32 esp_in_udp;
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+};
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+#endif
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+
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/*
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* This structure really needs to be cleaned up.
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* Most of it is for TCP, and not used by any of
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@@ -655,6 +661,9 @@ struct sock {
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#if defined(CONFIG_SPX) || defined (CONFIG_SPX_MODULE)
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struct spx_opt af_spx;
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#endif /* CONFIG_SPX */
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+#if 1
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+ struct udp_opt af_udp;
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+#endif
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} tp_pinfo;
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--- a/net/Config.in
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+++ b/net/Config.in
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@@ -104,4 +104,6 @@ comment 'Network testing'
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dep_tristate 'Packet Generator (USE WITH CAUTION)' CONFIG_NET_PKTGEN $CONFIG_PROC_FS
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endmenu
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+bool 'IPSEC NAT-Traversal' CONFIG_IPSEC_NAT_TRAVERSAL
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+
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endmenu
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--- a/net/ipv4/udp.c
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+++ b/net/ipv4/udp.c
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@@ -860,6 +860,9 @@ static void udp_close(struct sock *sk, l
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static int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
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{
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+#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
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+ struct udp_opt *tp = &(sk->tp_pinfo.af_udp);
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+#endif
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/*
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* Charge it to the socket, dropping if the queue is full.
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*/
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@@ -877,6 +880,40 @@ static int udp_queue_rcv_skb(struct sock
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}
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#endif
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+#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
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+ if (tp->esp_in_udp) {
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+ /*
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+ * Set skb->sk and xmit packet to ipsec_rcv.
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+ *
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+ * If ret != 0, ipsec_rcv refused the packet (not ESPinUDP),
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+ * restore skb->sk and fall back to sock_queue_rcv_skb
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+ */
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+ struct inet_protocol *esp = NULL;
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+
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+#if defined(CONFIG_KLIPS) && !defined(CONFIG_KLIPS_MODULE)
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+ /* optomize only when we know it is statically linked */
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+ extern struct inet_protocol esp_protocol;
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+ esp = &esp_protocol;
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+#else
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+ for (esp = (struct inet_protocol *)inet_protos[IPPROTO_ESP & (MAX_INET_PROTOS - 1)];
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+ (esp) && (esp->protocol != IPPROTO_ESP);
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+ esp = esp->next);
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+#endif
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+
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+ if (esp && esp->handler) {
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+ struct sock *sav_sk = skb->sk;
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+ skb->sk = sk;
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+ if (esp->handler(skb) == 0) {
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+ skb->sk = sav_sk;
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+ /*not sure we might count ESPinUDP as UDP...*/
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+ UDP_INC_STATS_BH(UdpInDatagrams);
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+ return 0;
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+ }
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+ skb->sk = sav_sk;
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+ }
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+ }
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+#endif
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+
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if (sock_queue_rcv_skb(sk,skb)<0) {
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UDP_INC_STATS_BH(UdpInErrors);
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IP_INC_STATS_BH(IpInDiscards);
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@@ -1100,13 +1137,49 @@ out:
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return len;
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}
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+static int udp_setsockopt(struct sock *sk, int level, int optname,
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+ char *optval, int optlen)
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+{
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+ struct udp_opt *tp = &(sk->tp_pinfo.af_udp);
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+ int val;
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+ int err = 0;
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+
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+ if (level != SOL_UDP)
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+ return ip_setsockopt(sk, level, optname, optval, optlen);
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+
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+ if(optlen<sizeof(int))
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+ return -EINVAL;
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+
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+ if (get_user(val, (int *)optval))
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+ return -EFAULT;
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+
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+ lock_sock(sk);
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+
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+ switch(optname) {
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+#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
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+#ifndef UDP_ESPINUDP
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+#define UDP_ESPINUDP 100
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+#endif
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+ case UDP_ESPINUDP:
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+ tp->esp_in_udp = val;
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+ break;
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+#endif
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+ default:
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+ err = -ENOPROTOOPT;
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+ break;
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+ }
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+
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+ release_sock(sk);
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+ return err;
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+}
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+
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struct proto udp_prot = {
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name: "UDP",
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close: udp_close,
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connect: udp_connect,
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disconnect: udp_disconnect,
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ioctl: udp_ioctl,
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- setsockopt: ip_setsockopt,
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+ setsockopt: udp_setsockopt,
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getsockopt: ip_getsockopt,
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sendmsg: udp_sendmsg,
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recvmsg: udp_recvmsg,
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