diff options
Diffstat (limited to 'pcap-linux.c')
| -rw-r--r-- | pcap-linux.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/pcap-linux.c b/pcap-linux.c index 6cf77602..104546e9 100644 --- a/pcap-linux.c +++ b/pcap-linux.c @@ -6055,8 +6055,13 @@ iface_ethtool_get_ts_info(pcap_t *handle, char *ebuf) info.cmd = ETHTOOL_GET_TS_INFO; ifr.ifr_data = (caddr_t)&info; if (ioctl(fd, SIOCETHTOOL, &ifr) == -1) { + int save_errno = errno; + close(fd); - if (errno == EOPNOTSUPP || errno == EINVAL) { + switch (save_errno) { + + case EOPNOTSUPP: + case EINVAL: /* * OK, this OS version or driver doesn't support * asking for the time stamping types, so let's @@ -6064,11 +6069,26 @@ iface_ethtool_get_ts_info(pcap_t *handle, char *ebuf) */ iface_set_all_ts_types(handle); return 0; + + case ENODEV: + /* + * OK, no such device. + * The user will find that out when they try to + * activate the device; just return an empty + * list of time stamp types. + */ + handle->tstamp_type_list = NULL; + return 0; + + default: + /* + * Other error. + */ + pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, + "%s: SIOCETHTOOL(ETHTOOL_GET_TS_INFO) ioctl failed: %s", handle->opt.source, + strerror(save_errno)); + return -1; } - pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, - "%s: SIOCETHTOOL(ETHTOOL_GET_TS_INFO) ioctl failed: %s", handle->opt.source, - strerror(errno)); - return -1; } close(fd); |