From cce215b2e83040e6360527308fbf685a5fd30375 Mon Sep 17 00:00:00 2001
From: Nick Peng <pymumu@gmail.com>
Date: Sat, 2 Jun 2018 18:50:42 +0800
Subject: [PATCH] Update code, fix PTR issue

---
 dns.c        | 2 ++
 dns_server.c | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/dns.c b/dns.c
index fd48c71..adff14b 100644
--- a/dns.c
+++ b/dns.c
@@ -758,6 +758,8 @@ int _dns_encode_CNAME(struct dns_context *context, struct dns_rrs *rrs)
 		return -1;
 	}
 
+	/* when code domain, len must plus 1, because of length at the begining */
+	rr_len++;
 	if (rr_len > rrs->len) {
 		return -1;
 	}
diff --git a/dns_server.c b/dns_server.c
index e662b71..4885474 100644
--- a/dns_server.c
+++ b/dns_server.c
@@ -170,7 +170,7 @@ static int _dns_add_rrs(struct dns_packet *packet, struct dns_request *request)
 				return -1;
 			}
 		}
-		
+
 		ret = dns_add_PTR(packet, DNS_RRS_AN, request->domain, 30, hostname);
 	} break;
 	case DNS_T_A:
@@ -486,7 +486,7 @@ static int _dns_server_process_ptr(struct dns_request *request, struct dns_packe
 		default:
 			break;
 		}
-		if (strncmp(request->domain, reverse_addr, sizeof(reverse_addr)) != 0) {
+		if (strncmp(request->domain, reverse_addr, sizeof(reverse_addr)) == 0) {
 			found = 1;
 			break;
 		}