static int common_ping_main(sa_family_t af, char **argv)
{
len_and_sockaddr *lsa;
INIT_G();
#if ENABLE_PING6
while ((++argv)[0] && argv[0][0] == '-') {
if (argv[0][1] == '4') {
af = AF_INET;
continue;
}
if (argv[0][1] == '6') {
af = AF_INET6;
continue;
}
bb_show_usage();
}
#else
argv++;
#endif
G.hostname = *argv;
if (!G.hostname)
bb_show_usage();
#if ENABLE_PING6
lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
#else
lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
#endif
/* Set timer _after_ DNS resolution */
signal(SIGALRM, noresp);
alarm(5); /* give the host 5000ms to respond */
create_icmp_socket(lsa);
G.myid = (uint16_t) getpid();
#if ENABLE_PING6
if (lsa->u.sa.sa_family == AF_INET6)
ping6(lsa);
else
#endif
ping4(lsa);
if (ENABLE_FEATURE_CLEAN_UP)
close(pingsock);
printf("%s is alive!\n", G.hostname);
return EXIT_SUCCESS;
}
int arping_main(int argc UNUSED_PARAM, char **argv)
{
const char *device = "eth0";
char *source = NULL;
char *target;
unsigned char *packet;
char *err_str;
INIT_G();
sock_fd = xsocket(AF_PACKET, SOCK_DGRAM, 0);
// Drop suid root privileges
// Need to remove SUID_NEVER from applets.h for this to work
//xsetuid(getuid());
err_str = xasprintf("interface %s %%s", device);
{
unsigned opt;
char *str_timeout;
/* Dad also sets quit_on_reply.
* Advert also sets unsolicited.
*/
opt_complementary = "=1:Df:AU:c+";
opt = getopt32(argv, "DUAqfbc:w:I:s:",
&count, &str_timeout, &device, &source);
if (opt & 0x80) /* -w: timeout */
timeout_us = xatou_range(str_timeout, 0, INT_MAX/2000000) * 1000000 + 500000;
//if (opt & 0x200) /* -s: source */
option_mask32 &= 0x3f; /* set respective flags */
}
target = argv[optind];
xfunc_error_retval = 2;
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy_IFNAMSIZ(ifr.ifr_name, device);
/* We use ifr.ifr_name in error msg so that problem
* with truncated name will be visible */
ioctl_or_perror_and_die(sock_fd, SIOCGIFINDEX, &ifr, err_str, "not found");
me.sll_ifindex = ifr.ifr_ifindex;
xioctl(sock_fd, SIOCGIFFLAGS, (char *) &ifr);
if (!(ifr.ifr_flags & IFF_UP)) {
bb_error_msg_and_die(err_str, "is down");
}
if (ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK)) {
bb_error_msg(err_str, "is not ARPable");
return (option_mask32 & DAD ? 0 : 2);
}
}
/* if (!inet_aton(target, &dst)) - not needed */ {
len_and_sockaddr *lsa;
lsa = xhost_and_af2sockaddr(target, 0, AF_INET);
dst = lsa->u.sin.sin_addr;
if (ENABLE_FEATURE_CLEAN_UP)
free(lsa);
}
if (source && !inet_aton(source, &src)) {
bb_error_msg_and_die("invalid source address %s", source);
}
if ((option_mask32 & (DAD|UNSOLICITED)) == UNSOLICITED && src.s_addr == 0)
src = dst;
if (!(option_mask32 & DAD) || src.s_addr) {
struct sockaddr_in saddr;
int probe_fd = xsocket(AF_INET, SOCK_DGRAM, 0);
setsockopt_bindtodevice(probe_fd, device);
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
if (src.s_addr) {
/* Check that this is indeed our IP */
saddr.sin_addr = src;
xbind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
} else { /* !(option_mask32 & DAD) case */
/* Find IP address on this iface */
socklen_t alen = sizeof(saddr);
saddr.sin_port = htons(1025);
saddr.sin_addr = dst;
if (setsockopt(probe_fd, SOL_SOCKET, SO_DONTROUTE, &const_int_1, sizeof(const_int_1)) == -1)
bb_perror_msg("setsockopt(SO_DONTROUTE)");
xconnect(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
if (getsockname(probe_fd, (struct sockaddr *) &saddr, &alen) == -1) {
bb_perror_msg_and_die("getsockname");
}
if (saddr.sin_family != AF_INET)
bb_error_msg_and_die("no IP address configured");
src = saddr.sin_addr;
}
close(probe_fd);
}
me.sll_family = AF_PACKET;
//me.sll_ifindex = ifindex; - done before
me.sll_protocol = htons(ETH_P_ARP);
xbind(sock_fd, (struct sockaddr *) &me, sizeof(me));
{
socklen_t alen = sizeof(me);
if (getsockname(sock_fd, (struct sockaddr *) &me, &alen) == -1) {
bb_perror_msg_and_die("getsockname");
}
}
if (me.sll_halen == 0) {
bb_error_msg(err_str, "is not ARPable (no ll address)");
return (option_mask32 & DAD ? 0 : 2);
}
he = me;
memset(he.sll_addr, -1, he.sll_halen);
if (!(option_mask32 & QUIET)) {
/* inet_ntoa uses static storage, can't use in same printf */
printf("ARPING to %s", inet_ntoa(dst));
printf(" from %s via %s\n", inet_ntoa(src), device);
}
signal_SA_RESTART_empty_mask(SIGINT, (void (*)(int))finish);
signal_SA_RESTART_empty_mask(SIGALRM, (void (*)(int))catcher);
catcher();
packet = xmalloc(4096);
while (1) {
sigset_t sset, osset;
struct sockaddr_ll from;
socklen_t alen = sizeof(from);
int cc;
cc = recvfrom(sock_fd, packet, 4096, 0, (struct sockaddr *) &from, &alen);
if (cc < 0) {
bb_perror_msg("recvfrom");
continue;
}
sigemptyset(&sset);
sigaddset(&sset, SIGALRM);
sigaddset(&sset, SIGINT);
sigprocmask(SIG_BLOCK, &sset, &osset);
recv_pack(packet, cc, &from);
sigprocmask(SIG_SETMASK, &osset, NULL);
}
}
int arping_main(int argc, char **argv)
{
const char *device = "eth0";
int ifindex;
char *source = NULL;
char *target;
s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
// Drop suid root privileges
xsetuid(getuid());
{
unsigned opt;
char *_count, *_timeout;
/* Dad also sets quit_on_reply.
* Advert also sets unsolicited.
*/
opt_complementary = "Df:AU";
opt = getopt32(argc, argv, "DUAqfbc:w:i:s:",
&_count, &_timeout, &device, &source);
cfg |= opt & 0x3f; /* set respective flags */
if (opt & 0x40) /* -c: count */
count = xatou(_count);
if (opt & 0x80) /* -w: timeout */
timeout = xatoul_range(_timeout, 0, INT_MAX/2000);
//if (opt & 0x100) /* -i: interface */
if (strlen(device) > IF_NAMESIZE) {
bb_error_msg_and_die("interface name '%s' is too long",
device);
}
//if (opt & 0x200) /* -s: source */
}
argc -= optind;
argv += optind;
if (argc != 1)
bb_show_usage();
target = *argv;
xfunc_error_retval = 2;
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, device, IFNAMSIZ - 1);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
bb_error_msg_and_die("interface %s not found", device);
}
ifindex = ifr.ifr_ifindex;
if (ioctl(s, SIOCGIFFLAGS, (char *) &ifr)) {
bb_error_msg_and_die("SIOCGIFFLAGS");
}
if (!(ifr.ifr_flags & IFF_UP)) {
bb_error_msg_and_die("interface %s is down", device);
}
if (ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK)) {
bb_error_msg("interface %s is not ARPable", device);
return (cfg & dad ? 0 : 2);
}
}
if (!inet_aton(target, &dst)) {
len_and_sockaddr *lsa;
lsa = xhost_and_af2sockaddr(target, 0, AF_INET);
memcpy(&dst, &lsa->sin.sin_addr.s_addr, 4);
if (ENABLE_FEATURE_CLEAN_UP)
free(lsa);
}
if (source && !inet_aton(source, &src)) {
bb_error_msg_and_die("invalid source address %s", source);
}
if (!(cfg & dad) && (cfg & unsolicited) && src.s_addr == 0)
src = dst;
if (!(cfg & dad) || src.s_addr) {
struct sockaddr_in saddr;
int probe_fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (device) {
if (setsockopt(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device, strlen(device) + 1) == -1)
bb_error_msg("warning: interface %s is ignored", device);
}
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
if (src.s_addr) {
saddr.sin_addr = src;
xbind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
} else if (!(cfg & dad)) {
socklen_t alen = sizeof(saddr);
saddr.sin_port = htons(1025);
saddr.sin_addr = dst;
if (setsockopt(probe_fd, SOL_SOCKET, SO_DONTROUTE, &const_int_1, sizeof(const_int_1)) == -1)
bb_perror_msg("warning: setsockopt(SO_DONTROUTE)");
xconnect(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
if (getsockname(probe_fd, (struct sockaddr *) &saddr, &alen) == -1) {
bb_error_msg_and_die("getsockname");
}
src = saddr.sin_addr;
}
close(probe_fd);
}
me.sll_family = AF_PACKET;
me.sll_ifindex = ifindex;
me.sll_protocol = htons(ETH_P_ARP);
xbind(s, (struct sockaddr *) &me, sizeof(me));
{
socklen_t alen = sizeof(me);
if (getsockname(s, (struct sockaddr *) &me, &alen) == -1) {
bb_error_msg_and_die("getsockname");
}
}
if (me.sll_halen == 0) {
bb_error_msg("interface \"%s\" is not ARPable (no ll address)", device);
return (cfg & dad ? 0 : 2);
}
he = me;
memset(he.sll_addr, -1, he.sll_halen);
if (!(cfg & quiet)) {
printf("ARPING to %s from %s via %s\n",
inet_ntoa(dst), inet_ntoa(src),
device ? device : "unknown");
}
if (!src.s_addr && !(cfg & dad)) {
bb_error_msg_and_die("no src address in the non-DAD mode");
}
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_flags = SA_RESTART;
sa.sa_handler = (void (*)(int)) finish;
sigaction(SIGINT, &sa, NULL);
sa.sa_handler = (void (*)(int)) catcher;
sigaction(SIGALRM, &sa, NULL);
}
catcher();
while (1) {
sigset_t sset, osset;
RESERVE_CONFIG_UBUFFER(packet, 4096);
struct sockaddr_ll from;
socklen_t alen = sizeof(from);
int cc;
cc = recvfrom(s, packet, 4096, 0, (struct sockaddr *) &from, &alen);
if (cc < 0) {
bb_perror_msg("recvfrom");
continue;
}
sigemptyset(&sset);
sigaddset(&sset, SIGALRM);
sigaddset(&sset, SIGINT);
sigprocmask(SIG_BLOCK, &sset, &osset);
recv_pack(packet, cc, &from);
sigprocmask(SIG_SETMASK, &osset, NULL);
RELEASE_CONFIG_BUFFER(packet);
}
}
