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

slirp/ip_icmp.c

@@ -114,8 +114,7 @@ icmp_input(m, 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;
@@ -161,7 +160,7 @@ icmp_input(m, hlen)
 	icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,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? */
@@ -311,7 +310,7 @@ icmp_error(msrc, type, code, minsize, 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);
   

slirp/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;

slirp/misc.c

@@ -94,10 +94,8 @@ 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

slirp/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
@@ -154,6 +156,7 @@ void slirp_init(void)
     }
 
     inet_aton(CTL_SPECIAL, &special_addr);
+    alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
     getouraddr();
 }
 

slirp/socket.c

@@ -596,7 +596,7 @@ solisten(port, laddr, lport, flags)
 	getsockname(s,(struct sockaddr *)&addr,&addrlen);
 	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;
 

slirp/tcp_subr.c

@@ -504,7 +504,7 @@ tcp_connect(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) {
@@ -840,7 +840,7 @@ tcp_emu(so, 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);

slirp/udp.c

@@ -657,7 +657,7 @@ udp_listen(port, laddr, lport, flags)
 	getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
 	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;