*head = curr;
if(!*list) *list = curr;
}
- out:
return curr;
}
static void ipv6netmask(unsigned prefix_length, struct sockaddr_in6 *sa)
{
- // FIXME: left for bit-wizard rich
- memset(&sa->sin6_addr, -1, sizeof(sa->sin6_addr));
+ unsigned char* hb = sa->sin6_addr.s6_addr;
+ unsigned onebytes = prefix_length / 8;
+ unsigned bits = prefix_length % 8;
+ unsigned nullbytes = 16 - onebytes;
+ memset(hb, -1, onebytes);
+ memset(hb+onebytes, 0, nullbytes);
+ if(bits) {
+ unsigned char x = -1;
+ x <<= 8 - bits;
+ hb[onebytes] = x;
+ }
}
static void dealwithipv6(stor **list, stor** head)
int getifaddrs(struct ifaddrs **ifap)
{
- FILE* f = fopen("/proc/net/dev", "r");
- if(!f) return -1;
-
- /* the alternative to parsing /proc.. seems to be iterating
- through the interfaces using an index number in ifreq.ifr_ifindex
- until we get some error code back. the kernel will fill ifr_name field
- for valid ifindices (SIOCGIFINDEX) */
stor *list = 0, *head = 0;
-
- char* line; char linebuf[512];
- while((line = fgets(linebuf, sizeof linebuf, f))) {
- while(isspace(*line) && *line) line++;
- char* start = line;
- while(*line && isalnum(*line)) line++;
- if(line > start && *line == ':') {
- // found interface
- *line = 0;
- stor* curr = list_add(&list, &head, start);
- if(!curr) {
- fclose(f);
- goto err2;
- }
+ struct if_nameindex* ii = if_nameindex();
+ if(!ii) return -1;
+ size_t i;
+ for(i = 0; ii[i].if_index || ii[i].if_name; i++) {
+ stor* curr = list_add(&list, &head, ii[i].if_name);
+ if(!curr) {
+ if_freenameindex(ii);
+ goto err2;
}
}
- fclose(f);
+ if_freenameindex(ii);
int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
if(sock == -1) goto err2;
if(-1 == ioctl(sock, SIOCGIFCONF, &conf)) goto err;
size_t reqitems = conf.ifc_len / sizeof(struct ifreq);
for(head = list; head; head = (stor*)head->next) {
- size_t i;
for(i = 0; i < reqitems; i++) {
// get SIOCGIFADDR of active interfaces.
if(!strcmp(reqs[i].ifr_name, head->name)) {