1 // SPDX-License-Identifier: GPL-2.0
2 /* nettest - used for functional tests of networking APIs
4 * Copyright (c) 2013-2019 David Ahern <dsahern@gmail.com>. All rights reserved.
10 #include <sys/ioctl.h>
11 #include <sys/socket.h>
12 #include <linux/tcp.h>
13 #include <arpa/inet.h>
15 #include <netinet/in.h>
28 #ifndef IPV6_UNICAST_IF
29 #define IPV6_UNICAST_IF 76
31 #ifndef IPV6_MULTICAST_IF
32 #define IPV6_MULTICAST_IF 17
35 #define DEFAULT_PORT 12345
38 #define MAX(a, b) ((a) > (b) ? (a) : (b))
41 #define MIN(a, b) ((a) < (b) ? (a) : (b))
56 int scope_id; /* remote scope; v6 send only */
58 struct in_addr grp; /* multicast group */
60 unsigned int has_local_ip:1,
69 int type; /* DGRAM, STREAM, RAW */
71 int version; /* AF_INET/AF_INET6 */
79 /* prefix for MD5 password */
81 struct sockaddr_in v4;
82 struct sockaddr_in6 v6;
84 unsigned int prefix_len;
86 /* expected addresses and device index for connection */
102 static int server_mode;
103 static unsigned int prog_timeout = 5;
104 static unsigned int interactive;
106 static char *msg = "Hello world!";
109 static int try_broadcast = 1;
111 static char *timestamp(char *timebuf, int buflen)
116 if (strftime(timebuf, buflen, "%T", localtime(&now)) == 0) {
117 memset(timebuf, 0, buflen);
118 strncpy(timebuf, "00:00:00", buflen-1);
124 static void log_msg(const char *format, ...)
132 fprintf(stdout, "%s %s:",
133 timestamp(timebuf, sizeof(timebuf)),
134 server_mode ? "server" : "client");
135 va_start(args, format);
136 vfprintf(stdout, format, args);
142 static void log_error(const char *format, ...)
150 fprintf(stderr, "%s %s:",
151 timestamp(timebuf, sizeof(timebuf)),
152 server_mode ? "server" : "client");
153 va_start(args, format);
154 vfprintf(stderr, format, args);
160 static void log_err_errno(const char *fmt, ...)
168 fprintf(stderr, "%s %s: ",
169 timestamp(timebuf, sizeof(timebuf)),
170 server_mode ? "server" : "client");
172 vfprintf(stderr, fmt, args);
175 fprintf(stderr, ": %d: %s\n", errno, strerror(errno));
179 static void log_address(const char *desc, struct sockaddr *sa)
186 if (sa->sa_family == AF_INET) {
187 struct sockaddr_in *s = (struct sockaddr_in *) sa;
191 inet_ntop(AF_INET, &s->sin_addr, addrstr,
195 } else if (sa->sa_family == AF_INET6) {
196 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
198 log_msg("%s [%s]:%d",
200 inet_ntop(AF_INET6, &s6->sin6_addr, addrstr,
202 ntohs(s6->sin6_port));
210 static int tcp_md5sig(int sd, void *addr, socklen_t alen, struct sock_args *args)
212 int keylen = strlen(args->password);
213 struct tcp_md5sig md5sig = {};
214 int opt = TCP_MD5SIG;
217 md5sig.tcpm_keylen = keylen;
218 memcpy(md5sig.tcpm_key, args->password, keylen);
220 if (args->prefix_len) {
221 opt = TCP_MD5SIG_EXT;
222 md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_PREFIX;
224 md5sig.tcpm_prefixlen = args->prefix_len;
225 addr = &args->md5_prefix;
227 memcpy(&md5sig.tcpm_addr, addr, alen);
230 opt = TCP_MD5SIG_EXT;
231 md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_IFINDEX;
233 md5sig.tcpm_ifindex = args->ifindex;
236 rc = setsockopt(sd, IPPROTO_TCP, opt, &md5sig, sizeof(md5sig));
238 /* ENOENT is harmless. Returned when a password is cleared */
242 log_err_errno("setsockopt(TCP_MD5SIG)");
248 static int tcp_md5_remote(int sd, struct sock_args *args)
250 struct sockaddr_in sin = {
251 .sin_family = AF_INET,
253 struct sockaddr_in6 sin6 = {
254 .sin6_family = AF_INET6,
259 switch (args->version) {
261 sin.sin_port = htons(args->port);
262 sin.sin_addr = args->remote_addr.in;
267 sin6.sin6_port = htons(args->port);
268 sin6.sin6_addr = args->remote_addr.in6;
273 log_error("unknown address family\n");
277 if (tcp_md5sig(sd, addr, alen, args))
283 static int get_ifidx(const char *ifname)
288 if (!ifname || *ifname == '\0')
291 memset(&ifdata, 0, sizeof(ifdata));
293 strcpy(ifdata.ifr_name, ifname);
295 sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
297 log_err_errno("socket failed");
301 rc = ioctl(sd, SIOCGIFINDEX, (char *)&ifdata);
304 log_err_errno("ioctl(SIOCGIFINDEX) failed");
308 return ifdata.ifr_ifindex;
311 static int bind_to_device(int sd, const char *name)
315 rc = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, strlen(name)+1);
317 log_err_errno("setsockopt(SO_BINDTODEVICE)");
322 static int get_bind_to_device(int sd, char *name, size_t len)
325 socklen_t optlen = len;
328 rc = getsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, &optlen);
330 log_err_errno("setsockopt(SO_BINDTODEVICE)");
335 static int check_device(int sd, struct sock_args *args)
340 if (get_bind_to_device(sd, name, sizeof(name)))
343 ifindex = get_ifidx(name);
345 log_msg(" bound to device %s/%d\n",
346 *name ? name : "<none>", ifindex);
348 if (!args->expected_ifindex)
351 if (args->expected_ifindex != ifindex) {
352 log_error("Device index mismatch: expected %d have %d\n",
353 args->expected_ifindex, ifindex);
357 log_msg("Device index matches: expected %d have %d\n",
358 args->expected_ifindex, ifindex);
363 static int set_pktinfo_v4(int sd)
368 rc = setsockopt(sd, SOL_IP, IP_PKTINFO, &one, sizeof(one));
369 if (rc < 0 && rc != -ENOTSUP)
370 log_err_errno("setsockopt(IP_PKTINFO)");
375 static int set_recvpktinfo_v6(int sd)
380 rc = setsockopt(sd, SOL_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
381 if (rc < 0 && rc != -ENOTSUP)
382 log_err_errno("setsockopt(IPV6_RECVPKTINFO)");
387 static int set_recverr_v4(int sd)
392 rc = setsockopt(sd, SOL_IP, IP_RECVERR, &one, sizeof(one));
393 if (rc < 0 && rc != -ENOTSUP)
394 log_err_errno("setsockopt(IP_RECVERR)");
399 static int set_recverr_v6(int sd)
404 rc = setsockopt(sd, SOL_IPV6, IPV6_RECVERR, &one, sizeof(one));
405 if (rc < 0 && rc != -ENOTSUP)
406 log_err_errno("setsockopt(IPV6_RECVERR)");
411 static int set_unicast_if(int sd, int ifindex, int version)
413 int opt = IP_UNICAST_IF;
417 ifindex = htonl(ifindex);
419 if (version == AF_INET6) {
420 opt = IPV6_UNICAST_IF;
423 rc = setsockopt(sd, level, opt, &ifindex, sizeof(ifindex));
425 log_err_errno("setsockopt(IP_UNICAST_IF)");
430 static int set_multicast_if(int sd, int ifindex)
432 struct ip_mreqn mreq = { .imr_ifindex = ifindex };
435 rc = setsockopt(sd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq));
437 log_err_errno("setsockopt(IP_MULTICAST_IF)");
442 static int set_membership(int sd, uint32_t grp, uint32_t addr, int ifindex)
444 uint32_t if_addr = addr;
445 struct ip_mreqn mreq;
448 if (addr == htonl(INADDR_ANY) && !ifindex) {
449 log_error("Either local address or device needs to be given for multicast membership\n");
453 mreq.imr_multiaddr.s_addr = grp;
454 mreq.imr_address.s_addr = if_addr;
455 mreq.imr_ifindex = ifindex;
457 rc = setsockopt(sd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
459 log_err_errno("setsockopt(IP_ADD_MEMBERSHIP)");
466 static int set_broadcast(int sd)
468 unsigned int one = 1;
471 if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) != 0) {
472 log_err_errno("setsockopt(SO_BROADCAST)");
479 static int set_reuseport(int sd)
481 unsigned int one = 1;
484 if (setsockopt(sd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) != 0) {
485 log_err_errno("setsockopt(SO_REUSEPORT)");
492 static int set_reuseaddr(int sd)
494 unsigned int one = 1;
497 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) != 0) {
498 log_err_errno("setsockopt(SO_REUSEADDR)");
505 static int str_to_uint(const char *str, int min, int max, unsigned int *value)
511 number = (unsigned int) strtoul(str, &end, 0);
513 /* entire string should be consumed by conversion
514 * and value should be between min and max
516 if (((*end == '\0') || (*end == '\n')) && (end != str) &&
517 (errno != ERANGE) && (min <= number) && (number <= max)) {
525 static int expected_addr_match(struct sockaddr *sa, void *expected,
531 if (sa->sa_family == AF_INET) {
532 struct sockaddr_in *s = (struct sockaddr_in *) sa;
533 struct in_addr *exp_in = (struct in_addr *) expected;
535 if (s->sin_addr.s_addr != exp_in->s_addr) {
536 log_error("%s address does not match expected %s",
538 inet_ntop(AF_INET, exp_in,
539 addrstr, sizeof(addrstr)));
542 } else if (sa->sa_family == AF_INET6) {
543 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
544 struct in6_addr *exp_in = (struct in6_addr *) expected;
546 if (memcmp(&s6->sin6_addr, exp_in, sizeof(*exp_in))) {
547 log_error("%s address does not match expected %s",
549 inet_ntop(AF_INET6, exp_in,
550 addrstr, sizeof(addrstr)));
554 log_error("%s address does not match expected - unknown family",
560 log_msg("%s address matches expected\n", desc);
565 static int show_sockstat(int sd, struct sock_args *args)
567 struct sockaddr_in6 local_addr, remote_addr;
568 socklen_t alen = sizeof(local_addr);
573 desc = server_mode ? "server local:" : "client local:";
574 sa = (struct sockaddr *) &local_addr;
575 if (getsockname(sd, sa, &alen) == 0) {
576 log_address(desc, sa);
578 if (args->has_expected_laddr) {
579 rc = expected_addr_match(sa, &args->expected_laddr,
583 log_err_errno("getsockname failed");
586 sa = (struct sockaddr *) &remote_addr;
587 desc = server_mode ? "server peer:" : "client peer:";
588 if (getpeername(sd, sa, &alen) == 0) {
589 log_address(desc, sa);
591 if (args->has_expected_raddr) {
592 rc |= expected_addr_match(sa, &args->expected_raddr,
596 log_err_errno("getpeername failed");
602 static int get_index_from_cmsg(struct msghdr *m)
608 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(m);
609 m->msg_controllen != 0 && cm;
610 cm = (struct cmsghdr *)CMSG_NXTHDR(m, cm)) {
612 if (cm->cmsg_level == SOL_IP &&
613 cm->cmsg_type == IP_PKTINFO) {
614 struct in_pktinfo *pi;
616 pi = (struct in_pktinfo *)(CMSG_DATA(cm));
617 inet_ntop(AF_INET, &pi->ipi_addr, buf, sizeof(buf));
618 ifindex = pi->ipi_ifindex;
619 } else if (cm->cmsg_level == SOL_IPV6 &&
620 cm->cmsg_type == IPV6_PKTINFO) {
621 struct in6_pktinfo *pi6;
623 pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
624 inet_ntop(AF_INET6, &pi6->ipi6_addr, buf, sizeof(buf));
625 ifindex = pi6->ipi6_ifindex;
630 log_msg(" pktinfo: ifindex %d dest addr %s\n",
636 static int send_msg_no_cmsg(int sd, void *addr, socklen_t alen)
641 err = sendto(sd, msg, msglen, 0, addr, alen);
643 if (errno == EACCES && try_broadcast) {
645 if (!set_broadcast(sd))
650 log_err_errno("sendto failed");
657 static int send_msg_cmsg(int sd, void *addr, socklen_t alen,
658 int ifindex, int version)
660 unsigned char cmsgbuf[64];
666 iov[0].iov_base = msg;
667 iov[0].iov_len = msglen;
670 m.msg_name = (caddr_t)addr;
671 m.msg_namelen = alen;
673 memset(cmsgbuf, 0, sizeof(cmsgbuf));
674 cm = (struct cmsghdr *)cmsgbuf;
675 m.msg_control = (caddr_t)cm;
677 if (version == AF_INET) {
678 struct in_pktinfo *pi;
680 cm->cmsg_level = SOL_IP;
681 cm->cmsg_type = IP_PKTINFO;
682 cm->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
683 pi = (struct in_pktinfo *)(CMSG_DATA(cm));
684 pi->ipi_ifindex = ifindex;
686 m.msg_controllen = cm->cmsg_len;
688 } else if (version == AF_INET6) {
689 struct in6_pktinfo *pi6;
691 cm->cmsg_level = SOL_IPV6;
692 cm->cmsg_type = IPV6_PKTINFO;
693 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
695 pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
696 pi6->ipi6_ifindex = ifindex;
698 m.msg_controllen = cm->cmsg_len;
702 err = sendmsg(sd, &m, 0);
704 if (errno == EACCES && try_broadcast) {
706 if (!set_broadcast(sd))
711 log_err_errno("sendmsg failed");
719 static int send_msg(int sd, void *addr, socklen_t alen, struct sock_args *args)
721 if (args->type == SOCK_STREAM) {
722 if (write(sd, msg, msglen) < 0) {
723 log_err_errno("write failed sending msg to peer");
726 } else if (args->ifindex && args->use_cmsg) {
727 if (send_msg_cmsg(sd, addr, alen, args->ifindex, args->version))
730 if (send_msg_no_cmsg(sd, addr, alen))
734 log_msg("Sent message:\n");
735 log_msg(" %.24s%s\n", msg, msglen > 24 ? " ..." : "");
740 static int socket_read_dgram(int sd, struct sock_args *args)
742 unsigned char addr[sizeof(struct sockaddr_in6)];
743 struct sockaddr *sa = (struct sockaddr *) addr;
744 socklen_t alen = sizeof(addr);
747 .msg_name = (caddr_t)addr,
752 unsigned char cmsgbuf[256];
753 struct cmsghdr *cm = (struct cmsghdr *)cmsgbuf;
758 iov[0].iov_base = (caddr_t)buf;
759 iov[0].iov_len = sizeof(buf);
761 memset(cmsgbuf, 0, sizeof(cmsgbuf));
762 m.msg_control = (caddr_t)cm;
763 m.msg_controllen = sizeof(cmsgbuf);
765 len = recvmsg(sd, &m, 0);
767 log_msg("peer closed connection.\n");
769 } else if (len < 0) {
770 log_msg("failed to read message: %d: %s\n",
771 errno, strerror(errno));
777 log_address("Message from:", sa);
778 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
780 ifindex = get_index_from_cmsg(&m);
781 if (args->expected_ifindex) {
782 if (args->expected_ifindex != ifindex) {
783 log_error("Device index mismatch: expected %d have %d\n",
784 args->expected_ifindex, ifindex);
787 log_msg("Device index matches: expected %d have %d\n",
788 args->expected_ifindex, ifindex);
791 if (!interactive && server_mode) {
792 if (sa->sa_family == AF_INET6) {
793 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
794 struct in6_addr *in6 = &s6->sin6_addr;
796 if (IN6_IS_ADDR_V4MAPPED(in6)) {
797 const uint32_t *pa = (uint32_t *) &in6->s6_addr;
799 struct sockaddr_in *sin;
801 sin = (struct sockaddr_in *) addr;
805 sin->sin_family = AF_INET;
806 if (send_msg_cmsg(sd, addr, alen,
807 ifindex, AF_INET) < 0)
812 iov[0].iov_len = len;
814 if (args->version == AF_INET6) {
815 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
818 /* avoid PKTINFO conflicts with bindtodev */
819 if (sendto(sd, buf, len, 0,
820 (void *) addr, alen) < 0)
823 /* kernel is allowing scope_id to be set to VRF
824 * index for LLA. for sends to global address
827 s6->sin6_scope_id = ifindex;
828 if (sendmsg(sd, &m, 0) < 0)
834 err = sendmsg(sd, &m, 0);
836 if (errno == EACCES && try_broadcast) {
838 if (!set_broadcast(sd))
845 log_msg("Sent message:\n");
846 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
851 log_err_errno("failed to send msg to peer");
855 static int socket_read_stream(int sd)
860 len = read(sd, buf, sizeof(buf)-1);
862 log_msg("client closed connection.\n");
864 } else if (len < 0) {
865 log_msg("failed to read message\n");
870 log_msg("Incoming message:\n");
871 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
873 if (!interactive && server_mode) {
874 if (write(sd, buf, len) < 0) {
875 log_err_errno("failed to send buf");
878 log_msg("Sent message:\n");
879 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
885 static int socket_read(int sd, struct sock_args *args)
887 if (args->type == SOCK_STREAM)
888 return socket_read_stream(sd);
890 return socket_read_dgram(sd, args);
893 static int stdin_to_socket(int sd, int type, void *addr, socklen_t alen)
898 if (fgets(buf, sizeof(buf), stdin) == NULL)
902 if (type == SOCK_STREAM) {
903 if (write(sd, buf, len) < 0) {
904 log_err_errno("failed to send buf");
911 err = sendto(sd, buf, len, 0, addr, alen);
913 if (errno == EACCES && try_broadcast) {
915 if (!set_broadcast(sd))
919 log_err_errno("failed to send msg to peer");
923 log_msg("Sent message:\n");
924 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
929 static void set_recv_attr(int sd, int version)
931 if (version == AF_INET6) {
932 set_recvpktinfo_v6(sd);
940 static int msg_loop(int client, int sd, void *addr, socklen_t alen,
941 struct sock_args *args)
943 struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
948 if (args->type != SOCK_STREAM)
949 set_recv_attr(sd, args->version);
952 msglen = strlen(msg);
954 /* client sends first message */
956 if (send_msg(sd, addr, alen, args))
966 nfds = interactive ? MAX(fileno(stdin), sd) + 1 : sd + 1;
971 FD_SET(fileno(stdin), &rfds);
973 rc = select(nfds, &rfds, NULL, NULL, ptval);
979 log_err_errno("select failed");
981 } else if (rc == 0) {
982 log_error("Timed out waiting for response\n");
987 if (FD_ISSET(sd, &rfds)) {
988 rc = socket_read(sd, args);
999 if (FD_ISSET(fileno(stdin), &rfds)) {
1000 if (stdin_to_socket(sd, args->type, addr, alen) <= 0)
1013 log_msg("Going into quiet mode\n");
1017 if (send_msg(sd, addr, alen, args)) {
1027 static int msock_init(struct sock_args *args, int server)
1029 uint32_t if_addr = htonl(INADDR_ANY);
1030 struct sockaddr_in laddr = {
1031 .sin_family = AF_INET,
1032 .sin_port = htons(args->port),
1037 if (!server && args->has_local_ip)
1038 if_addr = args->local_addr.in.s_addr;
1040 sd = socket(PF_INET, SOCK_DGRAM, 0);
1042 log_err_errno("socket");
1046 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR,
1047 (char *)&one, sizeof(one)) < 0) {
1048 log_err_errno("Setting SO_REUSEADDR error");
1052 if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST,
1053 (char *)&one, sizeof(one)) < 0)
1054 log_err_errno("Setting SO_BROADCAST error");
1056 if (args->dev && bind_to_device(sd, args->dev) != 0)
1058 else if (args->use_setsockopt &&
1059 set_multicast_if(sd, args->ifindex))
1062 laddr.sin_addr.s_addr = if_addr;
1064 if (bind(sd, (struct sockaddr *) &laddr, sizeof(laddr)) < 0) {
1065 log_err_errno("bind failed");
1070 set_membership(sd, args->grp.s_addr,
1071 args->local_addr.in.s_addr, args->ifindex))
1080 static int msock_server(struct sock_args *args)
1082 return msock_init(args, 1);
1085 static int msock_client(struct sock_args *args)
1087 return msock_init(args, 0);
1090 static int bind_socket(int sd, struct sock_args *args)
1092 struct sockaddr_in serv_addr = {
1093 .sin_family = AF_INET,
1095 struct sockaddr_in6 serv6_addr = {
1096 .sin6_family = AF_INET6,
1101 if (!args->has_local_ip && args->type == SOCK_RAW)
1104 switch (args->version) {
1106 serv_addr.sin_port = htons(args->port);
1107 serv_addr.sin_addr = args->local_addr.in;
1109 alen = sizeof(serv_addr);
1113 serv6_addr.sin6_port = htons(args->port);
1114 serv6_addr.sin6_addr = args->local_addr.in6;
1116 alen = sizeof(serv6_addr);
1120 log_error("Invalid address family\n");
1124 if (bind(sd, addr, alen) < 0) {
1125 log_err_errno("error binding socket");
1132 static int lsock_init(struct sock_args *args)
1137 sd = socket(args->version, args->type, args->protocol);
1139 log_err_errno("Error opening socket");
1143 if (set_reuseaddr(sd) != 0)
1146 if (set_reuseport(sd) != 0)
1149 if (args->dev && bind_to_device(sd, args->dev) != 0)
1151 else if (args->use_setsockopt &&
1152 set_unicast_if(sd, args->ifindex, args->version))
1155 if (bind_socket(sd, args))
1158 if (args->bind_test_only)
1161 if (args->type == SOCK_STREAM && listen(sd, 1) < 0) {
1162 log_err_errno("listen failed");
1166 flags = fcntl(sd, F_GETFL);
1167 if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
1168 log_err_errno("Failed to set non-blocking option");
1172 if (fcntl(sd, F_SETFD, FD_CLOEXEC) < 0)
1173 log_err_errno("Failed to set close-on-exec flag");
1183 static int do_server(struct sock_args *args)
1185 struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
1186 unsigned char addr[sizeof(struct sockaddr_in6)] = {};
1187 socklen_t alen = sizeof(addr);
1197 lsd = msock_server(args);
1199 lsd = lsock_init(args);
1204 if (args->bind_test_only) {
1209 if (args->type != SOCK_STREAM) {
1210 rc = msg_loop(0, lsd, (void *) addr, alen, args);
1215 if (args->password && tcp_md5_remote(lsd, args)) {
1222 log_msg("waiting for client connection.\n");
1226 rc = select(lsd+1, &rfds, NULL, NULL, ptval);
1236 log_err_errno("select failed");
1240 if (FD_ISSET(lsd, &rfds)) {
1242 csd = accept(lsd, (void *) addr, &alen);
1244 log_err_errno("accept failed");
1248 rc = show_sockstat(csd, args);
1252 rc = check_device(csd, args);
1257 rc = msg_loop(0, csd, (void *) addr, alen, args);
1269 static int wait_for_connect(int sd)
1271 struct timeval _tv = { .tv_sec = prog_timeout }, *tv = NULL;
1273 int val = 0, sz = sizeof(val);
1282 rc = select(FD_SETSIZE, NULL, &wfd, NULL, tv);
1284 log_error("connect timed out\n");
1286 } else if (rc < 0) {
1287 log_err_errno("select failed");
1291 if (getsockopt(sd, SOL_SOCKET, SO_ERROR, &val, (socklen_t *)&sz) < 0) {
1292 log_err_errno("getsockopt(SO_ERROR) failed");
1297 log_error("connect failed: %d: %s\n", val, strerror(val));
1304 static int connectsock(void *addr, socklen_t alen, struct sock_args *args)
1309 sd = socket(args->version, args->type, args->protocol);
1311 log_err_errno("Failed to create socket");
1315 flags = fcntl(sd, F_GETFL);
1316 if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
1317 log_err_errno("Failed to set non-blocking option");
1321 if (set_reuseport(sd) != 0)
1324 if (args->dev && bind_to_device(sd, args->dev) != 0)
1326 else if (args->use_setsockopt &&
1327 set_unicast_if(sd, args->ifindex, args->version))
1330 if (args->has_local_ip && bind_socket(sd, args))
1333 if (args->type != SOCK_STREAM)
1336 if (args->password && tcp_md5sig(sd, addr, alen, args))
1339 if (args->bind_test_only)
1342 if (connect(sd, addr, alen) < 0) {
1343 if (errno != EINPROGRESS) {
1344 log_err_errno("Failed to connect to remote host");
1348 rc = wait_for_connect(sd);
1360 static int do_client(struct sock_args *args)
1362 struct sockaddr_in sin = {
1363 .sin_family = AF_INET,
1365 struct sockaddr_in6 sin6 = {
1366 .sin6_family = AF_INET6,
1373 if (!args->has_remote_ip && !args->has_grp) {
1374 fprintf(stderr, "remote IP or multicast group not given\n");
1378 switch (args->version) {
1380 sin.sin_port = htons(args->port);
1382 sin.sin_addr = args->grp;
1384 sin.sin_addr = args->remote_addr.in;
1389 sin6.sin6_port = htons(args->port);
1390 sin6.sin6_addr = args->remote_addr.in6;
1391 sin6.sin6_scope_id = args->scope_id;
1393 alen = sizeof(sin6);
1398 sd = msock_client(args);
1400 sd = connectsock(addr, alen, args);
1405 if (args->bind_test_only)
1408 if (args->type == SOCK_STREAM) {
1409 rc = show_sockstat(sd, args);
1414 rc = msg_loop(1, sd, addr, alen, args);
1426 ADDR_TYPE_EXPECTED_LOCAL,
1427 ADDR_TYPE_EXPECTED_REMOTE,
1428 ADDR_TYPE_MD5_PREFIX,
1431 static int convert_addr(struct sock_args *args, const char *_str,
1432 enum addr_type atype)
1434 int pfx_len_max = args->version == AF_INET6 ? 128 : 32;
1435 int family = args->version;
1436 char *str, *dev, *sep;
1437 struct in6_addr *in6;
1448 case ADDR_TYPE_LOCAL:
1450 addr = &args->local_addr;
1452 case ADDR_TYPE_REMOTE:
1454 addr = &args->remote_addr;
1456 case ADDR_TYPE_MCAST:
1460 case ADDR_TYPE_EXPECTED_LOCAL:
1461 desc = "expected local";
1462 addr = &args->expected_laddr;
1464 case ADDR_TYPE_EXPECTED_REMOTE:
1465 desc = "expected remote";
1466 addr = &args->expected_raddr;
1468 case ADDR_TYPE_MD5_PREFIX:
1469 desc = "md5 prefix";
1470 if (family == AF_INET) {
1471 args->md5_prefix.v4.sin_family = AF_INET;
1472 addr = &args->md5_prefix.v4.sin_addr;
1473 } else if (family == AF_INET6) {
1474 args->md5_prefix.v6.sin6_family = AF_INET6;
1475 addr = &args->md5_prefix.v6.sin6_addr;
1479 sep = strchr(str, '/');
1483 if (str_to_uint(sep, 1, pfx_len_max,
1484 &args->prefix_len) != 0) {
1485 fprintf(stderr, "Invalid port\n");
1489 args->prefix_len = pfx_len_max;
1493 log_error("unknown address type");
1499 in = (struct in_addr *) addr;
1501 if (inet_pton(AF_INET, str, in) == 0) {
1502 log_error("Invalid %s IP address\n", desc);
1507 in->s_addr = htonl(INADDR_ANY);
1512 dev = strchr(str, '%');
1518 in6 = (struct in6_addr *) addr;
1520 if (inet_pton(AF_INET6, str, in6) == 0) {
1521 log_error("Invalid %s IPv6 address\n", desc);
1529 args->scope_id = get_ifidx(dev);
1530 if (args->scope_id < 0) {
1531 log_error("Invalid scope on %s IPv6 address\n",
1540 log_error("Invalid address family\n");
1548 static char *random_msg(int len)
1550 int i, n = 0, olen = len + 1;
1561 i = snprintf(m + n, olen - n, "%.26s",
1562 "abcdefghijklmnopqrstuvwxyz");
1566 i = snprintf(m + n, olen - n, "%.*s", len,
1567 "abcdefghijklmnopqrstuvwxyz");
1571 #define GETOPT_STR "sr:l:p:t:g:P:DRn:M:m:d:SCi6L:0:1:2:Fbq"
1573 static void print_usage(char *prog)
1578 " -r addr remote address to connect to (client mode only)\n"
1579 " -p port port to connect to (client mode)/listen on (server mode)\n"
1581 " -s server mode (default: client mode)\n"
1582 " -t timeout seconds (default: none)\n"
1585 " -F Restart server loop\n"
1586 " -6 IPv6 (default is IPv4)\n"
1587 " -P proto protocol for socket: icmp, ospf (default: none)\n"
1588 " -D|R datagram (D) / raw (R) socket (default stream)\n"
1589 " -l addr local address to bind to\n"
1591 " -d dev bind socket to given device name\n"
1592 " -S use setsockopt (IP_UNICAST_IF or IP_MULTICAST_IF)\n"
1593 " to set device binding\n"
1594 " -C use cmsg and IP_PKTINFO to specify device binding\n"
1596 " -L len send random message of given length\n"
1597 " -n num number of times to send message\n"
1599 " -M password use MD5 sum protection\n"
1600 " -m prefix/len prefix and length to use for MD5 key\n"
1601 " -g grp multicast group (e.g., 239.1.1.1)\n"
1602 " -i interactive mode (default is echo and terminate)\n"
1604 " -0 addr Expected local address\n"
1605 " -1 addr Expected remote address\n"
1606 " -2 dev Expected device name (or index) to receive packet\n"
1608 " -b Bind test only.\n"
1609 " -q Be quiet. Run test without printing anything.\n"
1610 , prog, DEFAULT_PORT);
1613 int main(int argc, char *argv[])
1615 struct sock_args args = {
1617 .type = SOCK_STREAM,
1618 .port = DEFAULT_PORT,
1620 struct protoent *pe;
1624 /* process inputs */
1625 extern char *optarg;
1629 * process input args
1632 while ((rc = getopt(argc, argv, GETOPT_STR)) != -1) {
1641 args.has_local_ip = 1;
1642 if (convert_addr(&args, optarg, ADDR_TYPE_LOCAL) < 0)
1646 args.has_remote_ip = 1;
1647 if (convert_addr(&args, optarg, ADDR_TYPE_REMOTE) < 0)
1651 if (str_to_uint(optarg, 1, 65535, &tmp) != 0) {
1652 fprintf(stderr, "Invalid port\n");
1655 args.port = (unsigned short) tmp;
1658 if (str_to_uint(optarg, 0, INT_MAX,
1659 &prog_timeout) != 0) {
1660 fprintf(stderr, "Invalid timeout\n");
1665 args.type = SOCK_DGRAM;
1668 args.type = SOCK_RAW;
1671 args.protocol = IPPROTO_RAW;
1674 pe = getprotobyname(optarg);
1676 args.protocol = pe->p_proto;
1678 if (str_to_uint(optarg, 0, 0xffff, &tmp) != 0) {
1679 fprintf(stderr, "Invalid protocol\n");
1682 args.protocol = tmp;
1686 iter = atoi(optarg);
1689 msg = random_msg(atoi(optarg));
1692 args.password = optarg;
1695 if (convert_addr(&args, optarg, ADDR_TYPE_MD5_PREFIX) < 0)
1699 args.use_setsockopt = 1;
1706 args.ifindex = get_ifidx(optarg);
1707 if (args.ifindex < 0) {
1708 fprintf(stderr, "Invalid device name\n");
1717 if (convert_addr(&args, optarg, ADDR_TYPE_MCAST) < 0)
1719 args.type = SOCK_DGRAM;
1722 args.version = AF_INET6;
1725 args.bind_test_only = 1;
1728 args.has_expected_laddr = 1;
1729 if (convert_addr(&args, optarg,
1730 ADDR_TYPE_EXPECTED_LOCAL))
1734 args.has_expected_raddr = 1;
1735 if (convert_addr(&args, optarg,
1736 ADDR_TYPE_EXPECTED_REMOTE))
1741 if (str_to_uint(optarg, 0, INT_MAX, &tmp) == 0) {
1742 args.expected_ifindex = (int)tmp;
1744 args.expected_ifindex = get_ifidx(optarg);
1745 if (args.expected_ifindex < 0) {
1747 "Invalid expected device\n");
1756 print_usage(argv[0]);
1761 if (args.password &&
1762 ((!args.has_remote_ip && !args.prefix_len) || args.type != SOCK_STREAM)) {
1763 log_error("MD5 passwords apply to TCP only and require a remote ip for the password\n");
1767 if (args.prefix_len && !args.password) {
1768 log_error("Prefix range for MD5 protection specified without a password\n");
1772 if ((args.use_setsockopt || args.use_cmsg) && !args.ifindex) {
1773 fprintf(stderr, "Device binding not specified\n");
1776 if (args.use_setsockopt || args.use_cmsg)
1780 fprintf(stderr, "Invalid number of messages to send\n");
1784 if (args.type == SOCK_STREAM && !args.protocol)
1785 args.protocol = IPPROTO_TCP;
1786 if (args.type == SOCK_DGRAM && !args.protocol)
1787 args.protocol = IPPROTO_UDP;
1789 if ((args.type == SOCK_STREAM || args.type == SOCK_DGRAM) &&
1791 fprintf(stderr, "Invalid port number\n");
1795 if (!server_mode && !args.has_grp &&
1796 !args.has_remote_ip && !args.has_local_ip) {
1798 "Local (server mode) or remote IP (client IP) required\n");
1809 rc = do_server(&args);
1814 return do_client(&args);