From: Fernando Alves <falves@maltem.com>
Date: Sun, 17 Sep 2023 12:41:05 +0000 (+0200)
Subject: fix infinite loop
X-Git-Tag: 2.2.1.2fdn3.22~3
X-Git-Url: http://git.sameswireless.fr/l2tpns.git/commitdiff_plain/ac381e055bf6c0016b5e0246cf30378209f11233

fix infinite loop
---

diff --git a/l2tpns.c b/l2tpns.c
index 152c8ec..5947561 100644
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -2716,7 +2716,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr, uint16_t indexu
 					result = 2; // general error
 					error = 3; // reserved field non-zero
 					msg = 0;
-					continue; // next
+					if (n == 0)
+					{
+						// if continue a infinity loop is created.
+						LOG(1, s, t, "It's infinite loop protection %02X\n", *b);
+						return;
+					}
+					else
+						continue; // next
 				}
 				b += 2;
 				if (*(uint16_t *) (b))
@@ -2726,7 +2733,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr, uint16_t indexu
 					result = 2; // general error
 					error = 6; // generic vendor-specific error
 					msg = "unsupported vendor-specific";
-					continue; // next
+					if (n == 0)
+					{
+						// if continue a infinity loop is created.
+						LOG(1, s, t, "It's infinite loop protection %02X\n", *b);
+						return;
+					}
+					else
+						continue; // next
 				}
 				b += 2;
 				mtype = ntohs(*(uint16_t *) (b));