fix: some leak

src/main.c

@@ -112,21 +112,21 @@ static int create_socket(struct setting const *settings)
         return -1;
     }
 
-    ret = setsockopt(sockfd, IPPROTO_IP, IP_TTL, &settings->ttl, sizeof(uint8_t));
+    ret = setsockopt(sockfd, IPPROTO_IP, IP_TTL, &settings->ttl, sizeof(settings->ttl));
     if (ret != 0)
     {
+        close(sockfd);
         print_err("Failed to setsockopt(): ttl");
         return -1;
     }
-    
+    struct timeval tv = {2, 0};
-    struct timeval tv = {1, 0};
     ret = setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
     if (ret != 0)
     {
+        close(sockfd);
         print_err("Failed to setsockopt(): recv timeout");
         return -1;
     }
-
     return sockfd;
 }
 
@@ -209,13 +209,13 @@ int main(int ac, char **av)
             ret = recvfrom(sockfd, buffer, recv_packet_size, 0, (struct sockaddr *) &sender, &len);
             if (ret < 0)
             {
-                print_err("error: receive packet failed.");
+                print_err("error: receive packet failed.%zd", ret);
                 goto error3;
             }
             gettimeofday(&stop, NULL);
         }
         while (((size_t) ret != recv_packet_size) || (check_reply(&settings.dest.ip, &sender, packet, buffer + sizeof(struct iphdr), packet_size)));
-
+        
         if (((struct icmphdr *) buffer + sizeof(struct iphdr))->type == 0)
             stats.packets_received++;