Changeset 15190 in vbox

Timestamp:

Dec 9, 2008 4:43:23 PM (16 years ago)

Author:

vboxsync

Message:

Slirp:ICMP: Attempt to enable traceroute scenario on Windows with Windows ICMP API

Location:

trunk/src/VBox/Devices/Network/slirp

Files:

• ip_icmp.c (modified) (1 diff)
• socket.c (modified) (3 diffs)

trunk/src/VBox/Devices/Network/slirp/ip_icmp.c

@@ -129 +129 @@
     struct ip *ip0;
     struct icmp *icp, *icp0;
-    struct icmp_msg *icm;
+    struct icmp_msg *icm = NULL;
     int found = 0;
     struct socket *head_socket;

trunk/src/VBox/Devices/Network/slirp/socket.c

@@ -847 +847 @@
         struct mbuf *m;
         struct icmp *icp;
+        struct icmp_msg *icm;
+        struct ip *ip_broken; /* ICMP returns header + 64 bit of packet */
+        uint32_t src;
         ICMP_ECHO_REPLY *icr;
         u_char code = ~0;
@@ -878 +881 @@
                                 ip->ip_p = IPPROTO_ICMP;
                                 ip->ip_dst.s_addr = so->so_laddr.s_addr; /*XXX: still the hack*/
-                                ip->ip_hl = sizeof(struct ip) >> 2;
+                                ip->ip_hl = sizeof(struct ip) >> 2; /* requiered for icmp_reflect, no IP options */
+                                ip->ip_ttl = icr[i].Options.Ttl; 
 
                                 icp = (struct icmp *)&ip[1]; /* no options */
@@ -891 +895 @@
 
                                 icmp_reflect(pData, m);
-                                m_free(pData, m);
                         case IP_TTL_EXPIRED_TRANSIT: /* TTL expired */
-                                LogRel(("ICMP: message with Status: %x was received from %x\n", icr[i].Status, icr[i].Address));
-                                LogRel(("ICMP: IP(v %hd, l %hd )\n", ip->ip_v, ip->ip_hl));
+
+                                ip_broken = icr[i].Data;
+                                icm = icmp_find_original_mbuf(pData, ip_broken);     
+                                if (icm == NULL) {
+                                    LogRel(("ICMP: can't find original package (first double word %x)\n", *(uint32_t *)ip_broken));
+                                    return;
+                                }
+                                m = icm->im_m;
+                                ip = mtod(m, struct ip *);
+                                ip->ip_ttl = icr[i].Options.Ttl;
+                                src = ip->ip_src.s_addr;
+                                ip->ip_dst.s_addr = src;
+                                ip->ip_dst.s_addr = icr[i].Address; 
+                                icp = (struct icmp *)((char *)ip + (ip->ip_hl << 2));
+                                ip_broken->ip_src.s_addr = src; /*it packet sent from host not from guest*/
+                                memcpy(icp->icmp_data, ip_broken, (ip_broken->ip_hl << 2) + 64);
+                                icmp_reflect(pData, m);
                         break;
                         default: