When using pcap_create_common() in pcap_fopen_offline(), leave

[libpcap] / pcap.c

diff --git a/pcap.c b/pcap.c
index c9b461c46affcacaf7533f688e25b6d5dfa797af..1599d10b890e6dcf98a2eb2e23e8d22d8c3449d1 100644 (file)
--- a/pcap.c
+++ b/pcap.c
@@ -190,12 +190,14 @@ pcap_create_common(const char *source, char *ebuf)
        p->fd = -1;     /* not opened yet */
 #endif 
 
-       p->opt.source = strdup(source);
-       if (p->opt.source == NULL) {
-               snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s",
-                   pcap_strerror(errno));
-               free(p);
-               return (NULL);
+       if (source != NULL) {
+               p->opt.source = strdup(source);
+               if (p->opt.source == NULL) {
+                       snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s",
+                           pcap_strerror(errno));
+                       free(p);
+                       return (NULL);
+               }
        }
 
        /*