Fix IP options injection and parsing. (#933)

* WIP

* Reuse func

Author: rafaelroquetto

.github/workflows/workflow_integration_tests_vm.yml

@@ -35,14 +35,15 @@ jobs:
       - name: build matrix
         id: build-matrix
         env:
-          # 5 partitions, one for each of:
+          # 6 partitions, one for each of:
           #  1. TestMultiProcess
           #  2. TestMultiProcessAppCP
           #  3. TestMultiProcessAppCPNoIP
           #  4. TestMultiProcessAppCPTCPOnly
           #  5. TestMultiProcessAppCPHeadersAndTCP
+          #  6. TestMultiProcessAppCPIPOnly
 
-          PARTITIONS: 5
+          PARTITIONS: 6
           TEST_TAGS: integration
         run: |
           echo -n "matrix=" >> $GITHUB_OUTPUT

bpf/common/trace_common.h

@@ -347,7 +347,7 @@ static __always_inline u8 find_trace_for_server_request(connection_info_t *conn,
     tp_info_pid_t *existing_tp = bpf_map_lookup_elem(&incoming_trace_map, conn);
     if (existing_tp) {
         found_tp = 1;
-        bpf_dbg_printk("Found incoming (TCP) tp for server request");
+        bpf_dbg_printk("Found incoming (TCP/IP) tp for server request");
         __builtin_memcpy(tp->trace_id, existing_tp->tp.trace_id, sizeof(tp->trace_id));
         __builtin_memcpy(tp->parent_id, existing_tp->tp.span_id, sizeof(tp->parent_id));
         bpf_map_delete_elem(&incoming_trace_map, conn);