diff options
Diffstat (limited to 'net.c')
| -rw-r--r-- | net.c | 49 |
1 files changed, 49 insertions, 0 deletions
@@ -0,0 +1,49 @@ +#include <sys/types.h> +#include <ifaddrs.h> +#include <netinet/in.h> +#include "net.h" + +static uint8_t is_loopback(struct sockaddr_in *addr) +{ + return (addr->sin_addr.s_addr & 0xFF) == 127; +} + +static void format_address(uint8_t *dst, struct sockaddr_in *addr) +{ + long ip = addr->sin_addr.s_addr; + dst[0] = ip; + dst[1] = ip >> 8; + dst[2] = ip >> 16; + dst[3] = ip >> 24; +} + +uint8_t get_host_address(iface_info *out) +{ + struct ifaddrs *entries, *current, *localhost; + if (getifaddrs(&entries)) { + return 0; + } + + for (current = entries; current; current = current->ifa_next) + { + if (current->ifa_addr && current->ifa_addr->sa_family == AF_INET) { + struct sockaddr_in *addr = (struct sockaddr_in *)current->ifa_addr; + if (is_loopback(addr)) { + localhost = current; + } else { + break; + } + } + } + if (!current && localhost) { + current = localhost; + } + uint8_t ret = 0; + if (current) { + ret = 1; + format_address(out->ip, (struct sockaddr_in *)current->ifa_addr); + format_address(out->net_mask, (struct sockaddr_in *)current->ifa_netmask); + } + freeifaddrs(entries); + return ret; +}
\ No newline at end of file |