Merge pull request #61 from detiam/fix_ipv6_raw_ttl

macronut · Aug 25, 2023 · 7cca681 · 7cca681
2 parents 53b995b + 69f6ec8
commit 7cca681
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/phantomtcp/raw.go b/phantomtcp/raw.go
@@ -363,7 +363,13 @@ func ModifyAndSendPacket(connInfo *ConnectionInfo, payload []byte, hint uint32,
 		}
 		defer f.Close()
 		fd := int(f.Fd())
-		err = syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_TTL, int(ttl))
+		level := syscall.IPPROTO_IP
+		name := syscall.IP_TTL
+		if network == "ip6:tcp" {
+			level = syscall.IPPROTO_IPV6
+			name = syscall.IPV6_UNICAST_HOPS
+		}
+		err = syscall.SetsockoptInt(fd, level, name, int(ttl))
 		if err != nil {
 			return err
 		}