diff options
Diffstat (limited to 'pcap-can-linux.c')
| -rw-r--r-- | pcap-can-linux.c | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/pcap-can-linux.c b/pcap-can-linux.c index fb8e232c8973..f6a3925ec065 100644 --- a/pcap-can-linux.c +++ b/pcap-can-linux.c @@ -72,11 +72,58 @@ static int can_setfilter_linux(pcap_t *, struct bpf_program *); static int can_setdirection_linux(pcap_t *, pcap_direction_t); static int can_stats_linux(pcap_t *, struct pcap_stat *); +int +can_findalldevs(pcap_if_t **devlistp, char *errbuf) +{ + /* + * There are no platform-specific devices since each device + * exists as a regular network interface. + * + * XXX - true? + */ + return 0; +} + pcap_t * -can_create(const char *device, char *ebuf) +can_create(const char *device, char *ebuf, int *is_ours) { + const char *cp; + char *cpend; + long devnum; pcap_t* p; + /* Does this look like a CANbus device? */ + cp = strrchr(device, '/'); + if (cp == NULL) + cp = device; + /* Does it begin with "can" or "vcan"? */ + if (strncmp(cp, "can", 3) == 0) { + /* Begins with "can" */ + cp += 3; /* skip past "can" */ + } else if (strncmp(cp, "vcan", 4) == 0) { + /* Begins with "vcan" */ + cp += 4; + } else { + /* Nope, doesn't begin with "can" or "vcan" */ + *is_ours = 0; + return NULL; + } + /* Yes - is "can" or "vcan" followed by a number from 0? */ + devnum = strtol(cp, &cpend, 10); + if (cpend == cp || *cpend != '\0') { + /* Not followed by a number. */ + *is_ours = 0; + return NULL; + } + if (devnum < 0) { + /* Followed by a non-valid number. */ + *is_ours = 0; + return NULL; + } + + /* OK, it's probably ours. */ + *is_ours = 1; + p = pcap_create_common(device, ebuf); if (p == NULL) return (NULL); |