int madwifing_build_vap(const char *ifname, char *errstr, const char *vapname,
char *retvapname, int vapmode, int vapflags) {
struct ieee80211_clone_params {
char icp_name[IFNAMSIZ];
uint16_t icp_opmode;
uint16_t icp_flags;
};
struct ieee80211_clone_params cp;
struct ifreq ifr;
int sock;
char tnam[IFNAMSIZ];
int n;
// Find a numbered vapname which is useable
for (n = 0; n < 10; n++) {
short fl;
snprintf(tnam, IFNAMSIZ, "%s%d", vapname, n);
if (ifconfig_get_flags(tnam, errstr, &fl) < 0)
break;
// Default to no temp name as error
tnam[0] = '\0';
}
if (tnam[0] == '\0') {
snprintf(errstr, 1024, "Unable to find free slot for VAP %s", vapname);
return -1;
}
memset(&ifr, 0, sizeof(ifr));
memset(&cp, 0, sizeof(cp));
strncpy(cp.icp_name, tnam, IFNAMSIZ);
cp.icp_opmode = vapmode;
cp.icp_flags = vapflags;
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
ifr.ifr_data = (caddr_t) &cp;
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
snprintf(errstr, 1024, "Unable to create socket to madwifi-ng: %s",
strerror(errno));
return -1;
}
if (ioctl(sock, SIOC80211IFCREATE, &ifr) < 0) {
snprintf(errstr, 1024, "Unable to create VAP: %s", strerror(errno));
close(sock);
return -1;
}
if (madwifing_setdevtype(ifr.ifr_name, ARPHDR_RADIOTAP, errstr) < 0) {
return -1;
}
strncpy(retvapname, ifr.ifr_name, IFNAMSIZ);
close(sock);
return 1;
}
int ifconfig_ifupdown(const char *in_dev, int devup)
{
int ret;
short rflags;
if ((ret = ifconfig_get_flags(in_dev, &rflags)) < 0)
return ret;
if (devup) {
rflags |= IFF_UP;
} else {
rflags &= ~IFF_UP;
}
return ifconfig_set_flags(in_dev, rflags);
}
