From 299cfa9449aa90a2ac9639a583ec4b13cba1a85a Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 3 May 2006 19:58:17 +0000
Subject: separate alias_addr (10.0.2.2) from our_addr (Ed Swierk)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1895 c046a42c-6fe2-441c-8c8c-71466251a162
---
 ip_icmp.c  | 7 +++----
 main.h     | 1 +
 misc.c     | 6 ++----
 slirp.c    | 3 +++
 socket.c   | 2 +-
 tcp_subr.c | 4 ++--
 udp.c      | 2 +-
 7 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/ip_icmp.c b/ip_icmp.c
index c8aaf4f..0e97af9 100644
--- a/ip_icmp.c
+++ b/ip_icmp.c
@@ -113,8 +113,7 @@ int hlen;
     case ICMP_ECHO:
         icp->icmp_type = ICMP_ECHOREPLY;
         ip->ip_len += hlen; /* since ip_input subtracts this */
-        if (ip->ip_dst.s_addr == our_addr.s_addr ||
-            (ip->ip_dst.s_addr == (special_addr.s_addr | htonl(CTL_ALIAS)))) {
+        if (ip->ip_dst.s_addr == alias_addr.s_addr) {
             icmp_reflect(m);
         } else {
             struct socket *so;
@@ -163,7 +162,7 @@ int hlen;
                            strerror(errno));
                 udp_detach(so);
             }
-        } /* if ip->ip_dst.s_addr == our_addr.s_addr */
+        } /* if ip->ip_dst.s_addr == alias_addr.s_addr */
         break;
     case ICMP_UNREACH:
         /* XXX? report error? close socket? */
@@ -321,7 +320,7 @@ char *message;
     ip->ip_ttl = MAXTTL;
     ip->ip_p = IPPROTO_ICMP;
     ip->ip_dst = ip->ip_src; /* ip adresses */
-    ip->ip_src = our_addr;
+    ip->ip_src = alias_addr;
 
     (void)ip_output((struct socket *)NULL, m);
 
diff --git a/main.h b/main.h
index 354ec24..97062f1 100644
--- a/main.h
+++ b/main.h
@@ -34,6 +34,7 @@ extern u_int curtime;
 extern fd_set *global_readfds, *global_writefds, *global_xfds;
 extern struct in_addr ctl_addr;
 extern struct in_addr special_addr;
+extern struct in_addr alias_addr;
 extern struct in_addr our_addr;
 extern struct in_addr loopback_addr;
 extern struct in_addr dns_addr;
diff --git a/misc.c b/misc.c
index 3f467ab..299653c 100644
--- a/misc.c
+++ b/misc.c
@@ -91,10 +91,8 @@ void getouraddr()
         he = gethostbyname(buff);
     if (he)
         our_addr = *(struct in_addr *)he->h_addr;
-    /* If the host doesn't have a useful IP address then use the
-       guest side address.  */
-    if (our_addr.s_addr == 0 || our_addr.s_addr == loopback_addr.s_addr)
-        our_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
+    if (our_addr.s_addr == 0)
+        our_addr.s_addr = loopback_addr.s_addr;
 }
 
 #if SIZEOF_CHAR_P == 8
diff --git a/slirp.c b/slirp.c
index 651487e..cf02ec3 100644
--- a/slirp.c
+++ b/slirp.c
@@ -9,6 +9,8 @@ struct in_addr loopback_addr;
 
 /* address for slirp virtual addresses */
 struct in_addr special_addr;
+/* virtual address alias for host */
+struct in_addr alias_addr;
 
 const uint8_t special_ethaddr[6] = { 0x52, 0x54, 0x00, 0x12, 0x35, 0x00 };
 
@@ -152,6 +154,7 @@ void slirp_init(void)
     }
 
     inet_aton(CTL_SPECIAL, &special_addr);
+    alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
     getouraddr();
 }
 
diff --git a/socket.c b/socket.c
index 9c7cbc8..c7b381d 100644
--- a/socket.c
+++ b/socket.c
@@ -595,7 +595,7 @@ int flags;
     so->so_fport = addr.sin_port;
     if (addr.sin_addr.s_addr == 0 ||
         addr.sin_addr.s_addr == loopback_addr.s_addr)
-        so->so_faddr = our_addr;
+        so->so_faddr = alias_addr;
     else
         so->so_faddr = addr.sin_addr;
 
diff --git a/tcp_subr.c b/tcp_subr.c
index 32f1d94..91df6b6 100644
--- a/tcp_subr.c
+++ b/tcp_subr.c
@@ -493,7 +493,7 @@ void tcp_connect(inso) struct socket *inso;
     so->so_faddr = addr.sin_addr;
     /* Translate connections from localhost to the real hostname */
     if (so->so_faddr.s_addr == 0 || so->so_faddr.s_addr == loopback_addr.s_addr)
-        so->so_faddr = our_addr;
+        so->so_faddr = alias_addr;
 
     /* Close the accept() socket, set right state */
     if (inso->so_state & SS_FACCEPTONCE) {
@@ -826,7 +826,7 @@ struct mbuf *m;
 
 				if (ns->so_faddr.s_addr == 0 || 
 					ns->so_faddr.s_addr == loopback_addr.s_addr)
-                  ns->so_faddr = our_addr;
+                  ns->so_faddr = alias_addr;
 
 				ns->so_iptos = tcp_tos(ns);
 				tp = sototcpcb(ns);
diff --git a/udp.c b/udp.c
index 96a3960..fe70970 100644
--- a/udp.c
+++ b/udp.c
@@ -645,7 +645,7 @@ int flags;
     so->so_fport = addr.sin_port;
     if (addr.sin_addr.s_addr == 0 ||
         addr.sin_addr.s_addr == loopback_addr.s_addr)
-        so->so_faddr = our_addr;
+        so->so_faddr = alias_addr;
     else
         so->so_faddr = addr.sin_addr;
 
-- 
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