From 8f720015cbec4c29b8264c126875bcef5c0a08a3 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Sun, 9 Feb 2014 13:43:13 +0000
Subject: remote end is now stored at every sock

---
 src/uanytun.c | 17 ++++++++++-------
 src/udp.c     | 22 ++++++++++++----------
 src/udp.h     |  4 ++--
 3 files changed, 24 insertions(+), 19 deletions(-)

(limited to 'src')

diff --git a/src/uanytun.c b/src/uanytun.c
index a0265d5..3473b24 100644
--- a/src/uanytun.c
+++ b/src/uanytun.c
@@ -124,7 +124,7 @@ int process_tun_data(tun_device_t* dev, udp_t* sock, options_t* opt, plain_packe
   else
     plain_packet_set_type(plain_packet, PAYLOAD_TYPE_UNKNOWN);
 
-  if(!sock->remote_end_set_)
+  if(!sock->active_sock_ || !sock->active_sock_->remote_end_set_)
     return 0;
 
   cipher_encrypt(c, kd, kd_outbound, plain_packet, encrypted_packet, seq_nr, opt->sender_id_, opt->mux_);
@@ -183,12 +183,15 @@ int process_sock_data(tun_device_t* dev, int fd, udp_t* sock, options_t* opt, pl
   }
 
   udp_set_active_sock(sock, fd);
-  if(remote.len_ != sock->remote_end_.len_ || memcmp(&(remote.addr_), &(sock->remote_end_.addr_), remote.len_)) {
-    memcpy(&(sock->remote_end_.addr_), &(remote.addr_), remote.len_);
-    sock->remote_end_set_ = 1;
-    char* addrstring = udp_endpoint_to_string(remote);
-    log_printf(NOTICE, "autodetected remote host changed %s", addrstring);
-    free(addrstring);
+  if(sock->active_sock_) {
+    if(remote.len_ != sock->active_sock_->remote_end_.len_ ||
+       memcmp(&(remote.addr_), &(sock->active_sock_->remote_end_.addr_), remote.len_)) {
+      memcpy(&(sock->active_sock_->remote_end_.addr_), &(remote.addr_), remote.len_);
+      sock->active_sock_->remote_end_set_ = 1;
+      char* addrstring = udp_endpoint_to_string(remote);
+      log_printf(NOTICE, "autodetected remote host changed %s", addrstring);
+      free(addrstring);
+    }
   }
 
   if(encrypted_packet_get_payload_length(encrypted_packet) <= plain_packet_get_header_length()) {
diff --git a/src/udp.c b/src/udp.c
index b75a8e6..883e9fc 100644
--- a/src/udp.c
+++ b/src/udp.c
@@ -59,9 +59,6 @@ int udp_init(udp_t* sock, const char* local_addr, const char* port, resolv_addr_
 
   sock->socks_ = NULL;
   sock->active_sock_ = NULL;
-  memset(&(sock->remote_end_.addr_), 0, sizeof(sock->remote_end_.addr_));
-  sock->remote_end_.len_ = sizeof(sock->remote_end_.addr_);
-  sock->remote_end_set_ = 0;
 
   struct addrinfo hints, *res;
 
@@ -100,6 +97,9 @@ int udp_init(udp_t* sock, const char* local_addr, const char* port, resolv_addr_
     }
     memset(&(new_sock->local_end_.addr_), 0, sizeof(new_sock->local_end_.addr_));
     new_sock->local_end_.len_ = sizeof(new_sock->local_end_.addr_);
+    memset(&(new_sock->remote_end_.addr_), 0, sizeof(new_sock->remote_end_.addr_));
+    new_sock->remote_end_.len_ = sizeof(new_sock->remote_end_.addr_);
+    new_sock->remote_end_set_ = 0;
     new_sock->next_ = NULL;
 
     if(!sock->socks_) {
@@ -189,9 +189,6 @@ int udp_resolv_remote(udp_t* sock, const char* remote_addr, const char* port, re
     log_printf(ERROR, "getaddrinfo returned no address for %s:%s", remote_addr, port);
     return -1;
   }
-  memcpy(&(sock->remote_end_.addr_), res->ai_addr, res->ai_addrlen);
-  sock->remote_end_.len_ = res->ai_addrlen;
-  sock->remote_end_set_ = 1;
 
   if(!sock->active_sock_) {
     udp_socket_t* s = sock->socks_;
@@ -203,6 +200,11 @@ int udp_resolv_remote(udp_t* sock, const char* remote_addr, const char* port, re
       s = s->next_;
     }
   }
+  if(sock->active_sock_) {
+    memcpy(&(sock->active_sock_->remote_end_.addr_), res->ai_addr, res->ai_addrlen);
+    sock->active_sock_->remote_end_.len_ = res->ai_addrlen;
+    sock->active_sock_->remote_end_set_ = 1;
+  }
 
   freeaddrinfo(res);
 
@@ -263,10 +265,10 @@ char* udp_endpoint_to_string(udp_endpoint_t e)
 
 char* udp_get_remote_end_string(udp_t* sock)
 {
-  if(!sock || !sock->remote_end_set_)
+  if(!sock || !sock->active_sock_->remote_end_set_)
     return NULL;
 
-  return udp_endpoint_to_string(sock->remote_end_);
+  return udp_endpoint_to_string(sock->active_sock_->remote_end_);
 }
 
 int udp_read(udp_t* sock, int fd, u_int8_t* buf, u_int32_t len, udp_endpoint_t* remote_end)
@@ -279,8 +281,8 @@ int udp_read(udp_t* sock, int fd, u_int8_t* buf, u_int32_t len, udp_endpoint_t*
 
 int udp_write(udp_t* sock, u_int8_t* buf, u_int32_t len)
 {
-  if(!sock || !sock->remote_end_set_ || !sock->active_sock_)
+  if(!sock || !sock->active_sock_ || !sock->active_sock_->remote_end_set_)
     return 0;
 
-  return sendto(sock->active_sock_->fd_, buf, len, 0, (struct sockaddr *)&(sock->remote_end_.addr_), sock->remote_end_.len_);
+  return sendto(sock->active_sock_->fd_, buf, len, 0, (struct sockaddr *)&(sock->active_sock_->remote_end_.addr_), sock->active_sock_->remote_end_.len_);
 }
diff --git a/src/udp.h b/src/udp.h
index 284d41f..2684c13 100644
--- a/src/udp.h
+++ b/src/udp.h
@@ -49,6 +49,8 @@ typedef struct {
 struct udp_socket_struct {
   int fd_;
   udp_endpoint_t local_end_;
+  udp_endpoint_t remote_end_;
+  int remote_end_set_;
   struct udp_socket_struct* next_;
 };
 typedef struct udp_socket_struct udp_socket_t;
@@ -56,8 +58,6 @@ typedef struct udp_socket_struct udp_socket_t;
 struct udp_struct {
   udp_socket_t* socks_;
   udp_socket_t* active_sock_;
-  udp_endpoint_t remote_end_;
-  int remote_end_set_;
 };
 typedef struct udp_struct udp_t;
 
-- 
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