[cgutman] 44618: [OSKITTCP] - Fix broken MTU code (MTU was assumed to always be 1500)

Author: cgutman
Date: Wed Dec 16 03:41:39 2009
New Revision: 44618
URL: http://svn.reactos.org/svn/reactos?rev=44618&view=rev
Log:
[OSKITTCP]
 - Fix broken MTU code (MTU was assumed to always be 1500)
Modified:
    branches/aicom-network-branch/lib/drivers/oskittcp/oskittcp/ip_output.c
Modified: branches/aicom-network-branch/lib/drivers/oskittcp/oskittcp/ip_output.c
URL:
http://svn.reactos.org/svn/reactos/branches/aicom-network-branch/lib/driver…
==============================================================================
--- branches/aicom-network-branch/lib/drivers/oskittcp/oskittcp/ip_output.c [iso-8859-1]
(original)
+++ branches/aicom-network-branch/lib/drivers/oskittcp/oskittcp/ip_output.c [iso-8859-1]
Wed Dec 16 03:41:39 2009
@@ -160,6 +160,7 @@
         */
 #define ifatoia(ifa)   ((struct in_ifaddr *)(ifa))
 #define sintosa(sin)   ((struct sockaddr *)(sin))
+#ifndef __REACTOS__
        if (flags & IP_ROUTETOIF) {
                if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst)))) == 0 &&
                    (ia = ifatoia(ifa_ifwithnet(sintosa(dst)))) == 0) {
@@ -167,9 +168,8 @@
                        error = ENETUNREACH;
                        goto bad;
                }
-#ifndef __REACTOS__
+
                ifp = ia->ia_ifp;
-#endif
                ip->ip_ttl = 1;
        } else {
                /*
@@ -181,7 +181,7 @@
                 * the link layer, as this is probably required in all cases
                 * for correct operation (as it is for ARP).
                 */
-#ifndef __REACTOS__
+
                if (ro->ro_rt == 0)
                        rtalloc_ign(ro, RTF_PRCLONING);
                if (ro->ro_rt == 0) {
@@ -195,8 +195,17 @@
                ro->ro_rt->rt_use++;
                if (ro->ro_rt->rt_flags & RTF_GATEWAY)
                        dst = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
-#endif
-       }
+       }
+
+#else
+       if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst)))) == 0 &&
+           (ia = ifatoia(ifa_ifwithnet(sintosa(dst)))) == 0) {
+               ipstat.ips_noroute++;
+               error = ENETUNREACH;
+               goto bad;
+       }
+#endif
+
 #ifndef __REACTOS__
        if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
                struct in_multi *inm;
@@ -358,7 +367,9 @@
        /*
         * If small enough for interface, can just send directly.
         */
-       if ((u_short)ip->ip_len <= 1400 /* XXX Get MTU from Interface */) {
+
+       /* FIXME: This was ROS-modified code. Where is the original? */
+       if ((u_short)ip->ip_len <= ((struct ifaddr *)ia)->ifa_mtu) {
            ip->ip_len = htons((u_short)ip->ip_len);
            ip->ip_off = htons((u_short)ip->ip_off);
            ip->ip_sum = 0;
@@ -421,8 +432,7 @@
                goto bad;
        }
 #else
-       OS_DbgPrint(OSK_MID_TRACE,("Using default mtu of 1500\n"));
-       len = (1500 - hlen) & ~7;
+       len = (((struct ifaddr *)ia)->ifa_mtu - hlen) & ~7;
 #endif
     {