fluencelabs/musl
1
0
Fork 0
mirror of https://github.com/fluencelabs/musl synced 2025-06-25 20:51:53 +00:00
Code Issues Projects Releases Wiki Activity

getifaddrs: use if_nameindex to enumerate interfaces

Browse Source
This commit is contained in:
rofl0r
2013-04-05 22:47:30 +02:00
parent 69a1983872
commit 4af3ea789a
1 changed files with 9 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/network/getifaddrs.c
View File

@ -106,31 +106,18 @@ 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;
@ -139,7 +126,6 @@ int getifaddrs(struct ifaddrs **ifap)
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)) {