Bug #863: test update to diagnose TOS test failure

appneta · Jun 2, 2024 · e1f6a9f · e1f6a9f
1 parent ff77374
commit e1f6a9f
Showing 1 changed file with 13 additions and 3 deletions.
diff --git a/src/tcpedit/tcpedit.c b/src/tcpedit/tcpedit.c
@@ -183,11 +183,21 @@ tcpedit_packet(tcpedit_t *tcpedit, struct pcap_pkthdr **pkthdr, u_char **pktdata
         /* set TOS ? */
         if (tcpedit->tos > -1) {
             volatile uint16_t oldval = *((uint16_t *)ip_hdr);
-            volatile uint16_t newval;
+            volatile uint16_t oldcsum, newval;
 
-            ip_hdr->ip_tos = tcpedit->tos;
-            newval = *((uint16_t *)ip_hdr);
+//            ip_hdr->ip_tos = tcpedit->tos;
+//            newval = *((uint16_t *)ip_hdr);
+            newval = htons(ntohs(*((uint16_t *)ip_hdr)) | (tcpedit->tos & 0xffff));
+            oldcsum = ip_hdr->ip_sum;
+            static uint32_t cnt;
             csum_replace2(&ip_hdr->ip_sum, oldval, newval);
+            notice("tos %u: pkt=%u old/new: tos=0x%04x/0x%04x csum=0x%04x/0x%04x\n",
+                   tcpedit->tos,
+                   ++cnt,
+                   htons(oldval),
+                   htons(newval),
+                   htons(oldcsum),
+                   htons(ip_hdr->ip_sum));
         }
 
         /* rewrite the TTL */