use xbind, xconnect where appropriate.
small edits to arping
This commit is contained in:
parent
7e46cf748e
commit
1dc1b37b33
@ -54,7 +54,8 @@ void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
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if (connect(s, s_addr, addrlen) < 0) {
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if (ENABLE_FEATURE_CLEAN_UP) close(s);
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if (s_addr->sa_family == AF_INET)
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bb_perror_msg_and_die("cannot connect to remote host (%s)",
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bb_perror_msg_and_die("%s (%s)",
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"cannot connect to remote host",
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inet_ntoa(((struct sockaddr_in *)s_addr)->sin_addr));
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bb_perror_msg_and_die("cannot connect to remote host");
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}
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@ -11,11 +11,6 @@
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#include <sys/ioctl.h>
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#include <signal.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <netinet/ether.h>
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@ -49,12 +44,12 @@ static int received;
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static int brd_recv;
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static int req_recv;
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#define MS_TDIFF(tv1,tv2) ( ((tv1).tv_sec-(tv2).tv_sec)*1000 + \
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((tv1).tv_usec-(tv2).tv_usec)/1000 )
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((tv1).tv_usec-(tv2).tv_usec)/1000 )
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static int send_pack(int sock, struct in_addr *src_addr,
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struct in_addr *dst_addr, struct sockaddr_ll *ME,
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struct sockaddr_ll *HE)
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struct in_addr *dst_addr, struct sockaddr_ll *ME,
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struct sockaddr_ll *HE)
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{
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int err;
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struct timeval now;
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@ -67,7 +62,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
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ah->ar_pro = htons(ETH_P_IP);
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ah->ar_hln = ME->sll_halen;
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ah->ar_pln = 4;
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ah->ar_op = cfg&advert ? htons(ARPOP_REPLY) : htons(ARPOP_REQUEST);
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ah->ar_op = cfg & advert ? htons(ARPOP_REPLY) : htons(ARPOP_REQUEST);
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memcpy(p, &ME->sll_addr, ah->ar_hln);
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p += ME->sll_halen;
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@ -75,7 +70,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
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memcpy(p, src_addr, 4);
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p += 4;
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if (cfg&advert)
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if (cfg & advert)
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memcpy(p, &ME->sll_addr, ah->ar_hln);
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else
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memcpy(p, &HE->sll_addr, ah->ar_hln);
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@ -89,7 +84,7 @@ static int send_pack(int sock, struct in_addr *src_addr,
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if (err == p - buf) {
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last = now;
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sent++;
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if (!(cfg&unicasting))
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if (!(cfg & unicasting))
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brd_sent++;
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}
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RELEASE_CONFIG_BUFFER(buf);
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@ -98,25 +93,17 @@ static int send_pack(int sock, struct in_addr *src_addr,
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static void finish(void)
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{
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if (!(cfg&quiet)) {
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printf("Sent %d probes (%d broadcast(s))\n"
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"Received %d repl%s",
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if (!(cfg & quiet)) {
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printf("Sent %d probe(s) (%d broadcast(s))\n"
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"Received %d repl%s"
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" (%d request(s), %d broadcast(s))\n",
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sent, brd_sent,
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received, (received > 1) ? "ies" : "y");
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if (brd_recv || req_recv) {
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printf(" (");
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if (req_recv)
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printf("%d request(s)", req_recv);
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if (brd_recv)
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printf("%s%d broadcast(s)", req_recv ? ", " : "", brd_recv);
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putchar(')');
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}
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putchar('\n');
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fflush(stdout);
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received, (received == 1) ? "ies" : "y",
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req_recv, brd_recv);
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}
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if (cfg&dad)
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if (cfg & dad)
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exit(!!received);
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if (cfg&unsolicited)
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if (cfg & unsolicited)
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exit(0);
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exit(!received);
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}
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@ -132,12 +119,12 @@ static void catcher(void)
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start = tv;
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if (count-- == 0
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|| (timeout && MS_TDIFF(tv, start) > timeout * 1000 + 500))
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|| (timeout && MS_TDIFF(tv, start) > timeout * 1000 + 500))
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finish();
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if (last.tv_sec == 0 || MS_TDIFF(tv, last) > 500) {
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send_pack(s, &src, &dst, &me, &he);
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if (count == 0 && cfg&unsolicited)
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if (count == 0 && (cfg & unsolicited))
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finish();
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}
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alarm(1);
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@ -150,9 +137,9 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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struct in_addr src_ip, dst_ip;
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/* Filter out wild packets */
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if (FROM->sll_pkttype != PACKET_HOST &&
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FROM->sll_pkttype != PACKET_BROADCAST &&
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FROM->sll_pkttype != PACKET_MULTICAST)
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if (FROM->sll_pkttype != PACKET_HOST
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&& FROM->sll_pkttype != PACKET_BROADCAST
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&& FROM->sll_pkttype != PACKET_MULTICAST)
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return 0;
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/* Only these types are recognised */
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@ -160,9 +147,8 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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return 0;
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/* ARPHRD check and this darned FDDI hack here :-( */
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if (ah->ar_hrd != htons(FROM->sll_hatype) &&
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(FROM->sll_hatype != ARPHRD_FDDI
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|| ah->ar_hrd != htons(ARPHRD_ETHER)))
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if (ah->ar_hrd != htons(FROM->sll_hatype)
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&& (FROM->sll_hatype != ARPHRD_FDDI || ah->ar_hrd != htons(ARPHRD_ETHER)))
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return 0;
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/* Protocol must be IP. */
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@ -176,7 +162,7 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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return 0;
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memcpy(&src_ip, p + ah->ar_hln, 4);
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memcpy(&dst_ip, p + ah->ar_hln + 4 + ah->ar_hln, 4);
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if (!(cfg&dad)) {
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if (!(cfg & dad)) {
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if (src_ip.s_addr != dst.s_addr)
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return 0;
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if (src.s_addr != dst_ip.s_addr)
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@ -204,15 +190,15 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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if (src.s_addr && src.s_addr != dst_ip.s_addr)
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return 0;
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}
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if (!(cfg&quiet)) {
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if (!(cfg & quiet)) {
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int s_printed = 0;
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struct timeval tv;
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gettimeofday(&tv, NULL);
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printf("%s %s from %s [%s]",
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FROM->sll_pkttype == PACKET_HOST ? "Unicast" : "Broadcast",
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ah->ar_op == htons(ARPOP_REPLY) ? "reply" : "request",
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printf("%scast re%s from %s [%s]",
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FROM->sll_pkttype == PACKET_HOST ? "Uni" : "Broad",
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ah->ar_op == htons(ARPOP_REPLY) ? "ply" : "quest",
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inet_ntoa(src_ip),
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ether_ntoa((struct ether_addr *) p));
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if (dst_ip.s_addr != src.s_addr) {
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@ -223,7 +209,7 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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if (!s_printed)
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printf("for ");
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printf("[%s]",
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ether_ntoa((struct ether_addr *) p + ah->ar_hln + 4));
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ether_ntoa((struct ether_addr *) p + ah->ar_hln + 4));
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}
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if (last.tv_sec) {
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@ -243,9 +229,9 @@ static int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
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brd_recv++;
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if (ah->ar_op == htons(ARPOP_REQUEST))
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req_recv++;
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if (cfg&quit_on_reply)
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if (cfg & quit_on_reply)
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finish();
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if (!(cfg&broadcast_only)) {
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if (!(cfg & broadcast_only)) {
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memcpy(he.sll_addr, p, me.sll_halen);
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cfg |= unicasting;
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}
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@ -279,11 +265,10 @@ int arping_main(int argc, char **argv)
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count = xatou(_count);
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if (opt & 0x80) /* -w: timeout */
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timeout = xatoul_range(_timeout, 0, INT_MAX/2000);
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if (opt & 0x100) { /* -i: interface */
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if (strlen(device) > IF_NAMESIZE) {
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bb_error_msg_and_die("interface name '%s' is too long",
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device);
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}
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//if (opt & 0x100) /* -i: interface */
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if (strlen(device) > IF_NAMESIZE) {
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bb_error_msg_and_die("interface name '%s' is too long",
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device);
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}
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//if (opt & 0x200) /* -s: source */
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}
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@ -315,7 +300,7 @@ int arping_main(int argc, char **argv)
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}
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if (ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK)) {
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bb_error_msg("interface %s is not ARPable", device);
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exit(cfg&dad ? 0 : 2);
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return (cfg & dad ? 0 : 2);
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}
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}
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@ -333,56 +318,44 @@ int arping_main(int argc, char **argv)
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bb_error_msg_and_die("invalid source address %s", source);
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}
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if (!(cfg&dad) && cfg&unsolicited && src.s_addr == 0)
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if (!(cfg & dad) && (cfg & unsolicited) && src.s_addr == 0)
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src = dst;
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if (!(cfg&dad) || src.s_addr) {
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if (!(cfg & dad) || src.s_addr) {
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struct sockaddr_in saddr;
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int probe_fd = xsocket(AF_INET, SOCK_DGRAM, 0);
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if (device) {
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if (setsockopt
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(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device,
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strlen(device) + 1) == -1)
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if (setsockopt(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device, strlen(device) + 1) == -1)
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bb_error_msg("warning: interface %s is ignored", device);
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}
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memset(&saddr, 0, sizeof(saddr));
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saddr.sin_family = AF_INET;
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if (src.s_addr) {
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saddr.sin_addr = src;
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if (bind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr)) == -1) {
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bb_error_msg_and_die("bind");
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}
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} else if (!(cfg&dad)) {
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xbind(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
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} else if (!(cfg & dad)) {
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static const int on = 1;
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socklen_t alen = sizeof(saddr);
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saddr.sin_port = htons(1025);
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saddr.sin_addr = dst;
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if (setsockopt
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(probe_fd, SOL_SOCKET, SO_DONTROUTE, (char *) &on,
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sizeof(on)) == -1)
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if (setsockopt(probe_fd, SOL_SOCKET, SO_DONTROUTE, (char *) &on, sizeof(on)) == -1)
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bb_perror_msg("warning: setsockopt(SO_DONTROUTE)");
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if (connect(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr))
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== -1) {
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bb_error_msg_and_die("connect");
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}
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if (getsockname(probe_fd, (struct sockaddr *) &saddr, &alen) ==
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-1) {
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xconnect(probe_fd, (struct sockaddr *) &saddr, sizeof(saddr));
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if (getsockname(probe_fd, (struct sockaddr *) &saddr, &alen) == -1) {
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bb_error_msg_and_die("getsockname");
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}
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src = saddr.sin_addr;
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}
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close(probe_fd);
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};
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}
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me.sll_family = AF_PACKET;
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me.sll_ifindex = ifindex;
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me.sll_protocol = htons(ETH_P_ARP);
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if (bind(s, (struct sockaddr *) &me, sizeof(me)) == -1) {
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bb_error_msg_and_die("bind");
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}
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xbind(s, (struct sockaddr *) &me, sizeof(me));
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{
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socklen_t alen = sizeof(me);
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@ -393,18 +366,18 @@ int arping_main(int argc, char **argv)
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}
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if (me.sll_halen == 0) {
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bb_error_msg("interface \"%s\" is not ARPable (no ll address)", device);
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exit(cfg&dad ? 0 : 2);
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return (cfg & dad ? 0 : 2);
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}
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he = me;
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memset(he.sll_addr, -1, he.sll_halen);
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if (!(cfg&quiet)) {
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if (!(cfg & quiet)) {
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printf("ARPING to %s from %s via %s\n",
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inet_ntoa(dst), inet_ntoa(src),
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device ? device : "unknown");
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}
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if (!src.s_addr && !(cfg&dad)) {
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if (!src.s_addr && !(cfg & dad)) {
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bb_error_msg_and_die("no src address in the non-DAD mode");
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}
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@ -430,8 +403,8 @@ int arping_main(int argc, char **argv)
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socklen_t alen = sizeof(from);
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int cc;
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if ((cc = recvfrom(s, packet, 4096, 0,
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(struct sockaddr *) &from, &alen)) < 0) {
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cc = recvfrom(s, packet, 4096, 0, (struct sockaddr *) &from, &alen);
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if (cc < 0) {
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bb_perror_msg("recvfrom");
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continue;
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}
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@ -12,10 +12,6 @@
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <net/if.h>
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#include <net/if_packet.h>
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#include <netpacket/packet.h>
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@ -120,8 +120,7 @@ int nc_main(int argc, char **argv)
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address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
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address.sin_port = bb_lookup_port(argv[1], "tcp", 0);
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if (connect(sfd, (struct sockaddr *) &address, sizeof(address)) < 0)
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bb_perror_msg_and_die("connect");
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xconnect(sfd, (struct sockaddr *) &address, sizeof(address));
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cfd = sfd;
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}
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}
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