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unix mtu/mac code for pcap.

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This commit is contained in:
Kelvin Sherlock 2018-12-31 20:49:07 -05:00
parent 4af3cf0761
commit aaeda41baf
1 changed files with 42 additions and 0 deletions
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42
src/rawnet/rawnetarch_unix.c
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@ -110,6 +110,7 @@ static pcap_if_t *rawnet_pcap_dev_list = NULL;
static pcap_t *rawnet_pcap_fp = NULL; static pcap_t *rawnet_pcap_fp = NULL;
static char *rawnet_device_name = NULL;
/** \brief Buffer for pcap error messages /** \brief Buffer for pcap error messages
@ -232,6 +233,7 @@ static int rawnet_pcap_open_adapter(const char *interface_name)
rawnet_pcap_fp = NULL; rawnet_pcap_fp = NULL;
return 0; return 0;
} }
rawnet_device_name = strdup(interface_name);
return 1; return 1;
} }
@ -448,10 +450,50 @@ char *rawnet_arch_get_standard_interface(void)
} }
extern int rawnet_arch_get_mtu(void) { extern int rawnet_arch_get_mtu(void) {
#if defined(__linux__)
int fd;
int ok;
struct ifreq ifr;
if (!rawnet_device_name) return -1;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) return -1;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, rawnet_device_name);
ok = ioctl(fd, SIOCGIFMTU, (void *)&ifr);
close(fd);
if (ok < 0) return -1;
return ifr.ifr_mtu;
#endif
return -1; return -1;
} }
extern int rawnet_arch_get_mac(uint8_t mac[6]) { extern int rawnet_arch_get_mac(uint8_t mac[6]) {
#if defined(__linux__)
int fd;
struct ifreq ifr;
int ok;
if (!rawnet_device_name) return -1;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) return -1;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, rawnet_device_name);
ok = ioctl(fd, SIOCGIFHWADDR, &ifr);
close(fd);
if (ok < 0) return -1;
memcpy(mac, &ifr.ifr_hwaddr.sa_data, 6);
return 0;
#endif
return -1; return -1;
} }