diff options
Diffstat (limited to 'pcap-bpf.c')
| -rw-r--r-- | pcap-bpf.c | 33 |
1 files changed, 27 insertions, 6 deletions
@@ -20,7 +20,7 @@ */ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/pcap-bpf.c,v 1.110 2008-04-14 20:40:58 guy Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/pcap-bpf.c,v 1.111 2008-07-01 08:02:33 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -413,11 +413,23 @@ pcap_can_set_rfmon_bpf(pcap_t *p) */ (void)strncpy(ifr.ifr_name, p->opt.source, sizeof(ifr.ifr_name)); if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "BIOCSETIF: %s: %s", - p->opt.source, pcap_strerror(errno)); - close(fd); - return (PCAP_ERROR); + if (errno == ENETDOWN) { + /* + * Return a "network down" indication, so that + * the application can report that rather than + * saying we had a mysterious failure and + * suggest that they report a problem to the + * libpcap developers. + */ + close(fd); + return (PCAP_ERROR_IFACE_NOT_UP); + } else { + snprintf(p->errbuf, PCAP_ERRBUF_SIZE, + "BIOCSETIF: %s: %s", + p->opt.source, pcap_strerror(errno)); + close(fd); + return (PCAP_ERROR); + } } /* @@ -1016,6 +1028,15 @@ check_setif_failure(pcap_t *p, int error) */ strcpy(p->errbuf, ""); return (PCAP_ERROR_NO_SUCH_DEVICE); + } else if (errno == ENETDOWN) { + /* + * Return a "network down" indication, so that + * the application can report that rather than + * saying we had a mysterious failure and + * suggest that they report a problem to the + * libpcap developers. + */ + return (PCAP_ERROR_IFACE_NOT_UP); } else { /* * Some other error; fill in the error string, and |