const char*
get_ifname_descriptor(const char* ifname, int ap_mode, int *ifindex, int *wan_no)
{
struct ifname_desc_t *ifd;
for (ifd = (struct ifname_desc_t *)&ifname_descs[0]; ifd->ifname; ifd++) {
if (ap_mode && ifd->is_router_mode)
continue;
if (!ap_mode && ifd->is_ap_mode)
continue;
if (strcmp(ifname, ifd->ifname) == 0) {
if (wan_no)
*wan_no = (int)ifd->wan_no;
if (ifd->is_dynamic)
*ifindex = get_interface_index(ifname);
else
*ifindex = 0;
return ifd->ifdesc;
}
}
return NULL;
}
static int set_routes(const char *name, const char *routes)
{
int index = get_interface_index(name);
if (index < 0) {
return index;
}
rtentry rt4;
memset(&rt4, 0, sizeof(rt4));
rt4.rt_dev = (char *)name;
rt4.rt_flags = RTF_UP;
rt4.rt_dst.sa_family = AF_INET;
rt4.rt_genmask.sa_family = AF_INET;
in6_rtmsg rt6;
memset(&rt6, 0, sizeof(rt6));
rt6.rtmsg_ifindex = index;
rt6.rtmsg_flags = RTF_UP;
char address[65];
int prefix;
int chars;
int count = 0;
while (sscanf(routes, " %64[^/]/%d %n", address, &prefix, &chars) == 2) {
routes += chars;
if (strchr(address, ':')) {
// Add an IPv6 route.
if (inet_pton(AF_INET6, address, &rt6.rtmsg_dst) != 1 ||
prefix < 0 || prefix > 128) {
count = BAD_ARGUMENT;
break;
}
rt6.rtmsg_dst_len = prefix ? prefix : 1;
if (ioctl(inet6, SIOCADDRT, &rt6) && errno != EEXIST) {
count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR;
break;
}
if (!prefix) {
// Split the route instead of replacing the default route.
rt6.rtmsg_dst.s6_addr[0] ^= 0x80;
if (ioctl(inet6, SIOCADDRT, &rt6) && errno != EEXIST) {
count = SYSTEM_ERROR;
break;
}
}
} else {
// Add an IPv4 route.
if (inet_pton(AF_INET, address, as_in_addr(&rt4.rt_dst)) != 1 ||
prefix < 0 || prefix > 32) {
count = BAD_ARGUMENT;
break;
}
in_addr_t mask = prefix ? (~0 << (32 - prefix)) : 0x80000000;
*as_in_addr(&rt4.rt_genmask) = htonl(mask);
if (ioctl(inet4, SIOCADDRT, &rt4) && errno != EEXIST) {
count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR;
break;
}
if (!prefix) {
// Split the route instead of replacing the default route.
*as_in_addr(&rt4.rt_dst) ^= htonl(0x80000000);
if (ioctl(inet4, SIOCADDRT, &rt4) && errno != EEXIST) {
count = SYSTEM_ERROR;
break;
}
}
}
ALOGD("Route added on %s: %s/%d", name, address, prefix);
++count;
}
if (count == BAD_ARGUMENT) {
ALOGE("Invalid route: %s/%d", address, prefix);
} else if (count == SYSTEM_ERROR) {
ALOGE("Cannot add route: %s/%d: %s",
address, prefix, strerror(errno));
} else if (*routes) {
ALOGE("Invalid route: %s", routes);
count = BAD_ARGUMENT;
}
return count;
}
static int set_addresses(const char *name, const char *addresses)
{
int index = get_interface_index(name);
if (index < 0) {
return index;
}
ifreq ifr4;
memset(&ifr4, 0, sizeof(ifr4));
strncpy(ifr4.ifr_name, name, IFNAMSIZ);
ifr4.ifr_addr.sa_family = AF_INET;
ifr4.ifr_netmask.sa_family = AF_INET;
in6_ifreq ifr6;
memset(&ifr6, 0, sizeof(ifr6));
ifr6.ifr6_ifindex = index;
char address[65];
int prefix;
int chars;
int count = 0;
while (sscanf(addresses, " %64[^/]/%d %n", address, &prefix, &chars) == 2) {
addresses += chars;
if (strchr(address, ':')) {
// Add an IPv6 address.
if (inet_pton(AF_INET6, address, &ifr6.ifr6_addr) != 1 ||
prefix < 0 || prefix > 128) {
count = BAD_ARGUMENT;
break;
}
ifr6.ifr6_prefixlen = prefix;
if (ioctl(inet6, SIOCSIFADDR, &ifr6)) {
count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR;
break;
}
} else {
// Add an IPv4 address.
if (inet_pton(AF_INET, address, as_in_addr(&ifr4.ifr_addr)) != 1 ||
prefix < 0 || prefix > 32) {
count = BAD_ARGUMENT;
break;
}
if (count) {
sprintf(ifr4.ifr_name, "%s:%d", name, count);
}
if (ioctl(inet4, SIOCSIFADDR, &ifr4)) {
count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR;
break;
}
in_addr_t mask = prefix ? (~0 << (32 - prefix)) : 0;
*as_in_addr(&ifr4.ifr_netmask) = htonl(mask);
if (ioctl(inet4, SIOCSIFNETMASK, &ifr4)) {
count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR;
break;
}
}
ALOGD("Address added on %s: %s/%d", name, address, prefix);
++count;
}
if (count == BAD_ARGUMENT) {
ALOGE("Invalid address: %s/%d", address, prefix);
} else if (count == SYSTEM_ERROR) {
ALOGE("Cannot add address: %s/%d: %s", address, prefix, strerror(errno));
} else if (*addresses) {
ALOGE("Invalid address: %s", addresses);
count = BAD_ARGUMENT;
}
return count;
}
int main(int argc, char** argv) {
unsigned long my_ip, my_netmask, my_prefix, network_len, cur_ip;
int my_index;
struct sockaddr sa;
int sock;
u_char hwaddr[MAC_ADDR_LEN];
char *ifname, *ifsend, *cindex;
char ch;
if (argc < 2) {
print_usage(usage);
}
while ((ch = getopt(argc, argv, "d")) != -1) {
switch(ch) {
case 'd':
opt_d = 1;
break;
case '?':
default:
goto args;
}
}
args: argc -= optind;
argv += optind;
if (opt_d && !argc) {
print_usage(usage);
}
// Sockets
sock = NEWSOCKET();
ioctl_sock = NEWSOCKET();
// Recv timeout
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 1;
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv, sizeof(struct timeval));
if ((sock < 0) || (ioctl_sock < 0)) {
perror("Unable to create socket");
exit(1);
}
if (!(ifname = strdup(*argv)) || !(ifsend = strdup(*argv)))
die("Cannot duplicate interface name\n");
/*
* For an alias interface we use its data but we send
* the actual packet on corresponding real interface
*/
if ((cindex = strchr(ifsend, ':')))
*cindex = '\0';
if (opt_d) {
printf("Interface: %s\n", ifname);
}
sa.sa_family = AF_INET;
strcpy(sa.sa_data, ifsend);
get_hw_addr(hwaddr, ifname);
my_ip = get_ip_addr(ifname);
my_netmask = get_ip_mask(ifname);
my_index = get_interface_index(ifname);
my_prefix = my_ip & my_netmask;
network_len = my_netmask ^ 0xffffffff;
if (opt_d) {
printf("Prefix: %lu\n", my_prefix);
printf("Network length: %lu\n", network_len);
}
for (cur_ip = my_prefix + 1; cur_ip <= my_prefix + network_len; cur_ip++) {
if (cur_ip == my_ip) continue; // Skip gratuitous ARP
send_arp(sock, my_index, cur_ip, my_ip, hwaddr);
detect_sonos(sock);
}
exit(0);
}