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>
13 #include <linux/tcp.h>
14 #include <arpa/inet.h>
16 #include <netinet/in.h>
30 #ifndef IPV6_UNICAST_IF
31 #define IPV6_UNICAST_IF 76
33 #ifndef IPV6_MULTICAST_IF
34 #define IPV6_MULTICAST_IF 17
37 #define DEFAULT_PORT 12345
39 #define NS_PREFIX "/run/netns/"
42 #define MAX(a, b) ((a) > (b) ? (a) : (b))
45 #define MIN(a, b) ((a) < (b) ? (a) : (b))
50 const char *local_addr_str;
57 const char *remote_addr_str;
62 int scope_id; /* remote scope; v6 send only */
64 struct in_addr grp; /* multicast group */
66 unsigned int has_local_ip:1,
75 int type; /* DGRAM, STREAM, RAW */
77 int version; /* AF_INET/AF_INET6 */
88 /* prefix for MD5 password */
89 const char *md5_prefix_str;
91 struct sockaddr_in v4;
92 struct sockaddr_in6 v6;
94 unsigned int prefix_len;
96 /* expected addresses and device index for connection */
97 const char *expected_dev;
101 const char *expected_laddr_str;
108 const char *expected_raddr_str;
115 static int server_mode;
116 static unsigned int prog_timeout = 5;
117 static unsigned int interactive;
119 static char *msg = "Hello world!";
122 static int try_broadcast = 1;
124 static char *timestamp(char *timebuf, int buflen)
129 if (strftime(timebuf, buflen, "%T", localtime(&now)) == 0) {
130 memset(timebuf, 0, buflen);
131 strncpy(timebuf, "00:00:00", buflen-1);
137 static void log_msg(const char *format, ...)
145 fprintf(stdout, "%s %s:",
146 timestamp(timebuf, sizeof(timebuf)),
147 server_mode ? "server" : "client");
148 va_start(args, format);
149 vfprintf(stdout, format, args);
155 static void log_error(const char *format, ...)
163 fprintf(stderr, "%s %s:",
164 timestamp(timebuf, sizeof(timebuf)),
165 server_mode ? "server" : "client");
166 va_start(args, format);
167 vfprintf(stderr, format, args);
173 static void log_err_errno(const char *fmt, ...)
181 fprintf(stderr, "%s %s: ",
182 timestamp(timebuf, sizeof(timebuf)),
183 server_mode ? "server" : "client");
185 vfprintf(stderr, fmt, args);
188 fprintf(stderr, ": %d: %s\n", errno, strerror(errno));
192 static void log_address(const char *desc, struct sockaddr *sa)
199 if (sa->sa_family == AF_INET) {
200 struct sockaddr_in *s = (struct sockaddr_in *) sa;
204 inet_ntop(AF_INET, &s->sin_addr, addrstr,
208 } else if (sa->sa_family == AF_INET6) {
209 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
211 log_msg("%s [%s]:%d",
213 inet_ntop(AF_INET6, &s6->sin6_addr, addrstr,
215 ntohs(s6->sin6_port));
223 static int switch_ns(const char *ns)
229 log_error("warning: likely need root to set netns %s!\n", ns);
231 snprintf(path, sizeof(path), "%s%s", NS_PREFIX, ns);
234 log_err_errno("Failed to open netns path; can not switch netns");
238 ret = setns(fd, CLONE_NEWNET);
244 static int tcp_md5sig(int sd, void *addr, socklen_t alen, struct sock_args *args)
246 int keylen = strlen(args->password);
247 struct tcp_md5sig md5sig = {};
248 int opt = TCP_MD5SIG;
251 md5sig.tcpm_keylen = keylen;
252 memcpy(md5sig.tcpm_key, args->password, keylen);
254 if (args->prefix_len) {
255 opt = TCP_MD5SIG_EXT;
256 md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_PREFIX;
258 md5sig.tcpm_prefixlen = args->prefix_len;
259 addr = &args->md5_prefix;
261 memcpy(&md5sig.tcpm_addr, addr, alen);
264 opt = TCP_MD5SIG_EXT;
265 md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_IFINDEX;
267 md5sig.tcpm_ifindex = args->ifindex;
270 rc = setsockopt(sd, IPPROTO_TCP, opt, &md5sig, sizeof(md5sig));
272 /* ENOENT is harmless. Returned when a password is cleared */
276 log_err_errno("setsockopt(TCP_MD5SIG)");
282 static int tcp_md5_remote(int sd, struct sock_args *args)
284 struct sockaddr_in sin = {
285 .sin_family = AF_INET,
287 struct sockaddr_in6 sin6 = {
288 .sin6_family = AF_INET6,
293 switch (args->version) {
295 sin.sin_port = htons(args->port);
296 sin.sin_addr = args->remote_addr.in;
301 sin6.sin6_port = htons(args->port);
302 sin6.sin6_addr = args->remote_addr.in6;
307 log_error("unknown address family\n");
311 if (tcp_md5sig(sd, addr, alen, args))
317 static int get_ifidx(const char *ifname)
322 if (!ifname || *ifname == '\0')
325 memset(&ifdata, 0, sizeof(ifdata));
327 strcpy(ifdata.ifr_name, ifname);
329 sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
331 log_err_errno("socket failed");
335 rc = ioctl(sd, SIOCGIFINDEX, (char *)&ifdata);
338 log_err_errno("ioctl(SIOCGIFINDEX) failed");
342 return ifdata.ifr_ifindex;
345 static int bind_to_device(int sd, const char *name)
349 rc = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, strlen(name)+1);
351 log_err_errno("setsockopt(SO_BINDTODEVICE)");
356 static int get_bind_to_device(int sd, char *name, size_t len)
359 socklen_t optlen = len;
362 rc = getsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, &optlen);
364 log_err_errno("setsockopt(SO_BINDTODEVICE)");
369 static int check_device(int sd, struct sock_args *args)
374 if (get_bind_to_device(sd, name, sizeof(name)))
377 ifindex = get_ifidx(name);
379 log_msg(" bound to device %s/%d\n",
380 *name ? name : "<none>", ifindex);
382 if (!args->expected_ifindex)
385 if (args->expected_ifindex != ifindex) {
386 log_error("Device index mismatch: expected %d have %d\n",
387 args->expected_ifindex, ifindex);
391 log_msg("Device index matches: expected %d have %d\n",
392 args->expected_ifindex, ifindex);
397 static int set_pktinfo_v4(int sd)
402 rc = setsockopt(sd, SOL_IP, IP_PKTINFO, &one, sizeof(one));
403 if (rc < 0 && rc != -ENOTSUP)
404 log_err_errno("setsockopt(IP_PKTINFO)");
409 static int set_recvpktinfo_v6(int sd)
414 rc = setsockopt(sd, SOL_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
415 if (rc < 0 && rc != -ENOTSUP)
416 log_err_errno("setsockopt(IPV6_RECVPKTINFO)");
421 static int set_recverr_v4(int sd)
426 rc = setsockopt(sd, SOL_IP, IP_RECVERR, &one, sizeof(one));
427 if (rc < 0 && rc != -ENOTSUP)
428 log_err_errno("setsockopt(IP_RECVERR)");
433 static int set_recverr_v6(int sd)
438 rc = setsockopt(sd, SOL_IPV6, IPV6_RECVERR, &one, sizeof(one));
439 if (rc < 0 && rc != -ENOTSUP)
440 log_err_errno("setsockopt(IPV6_RECVERR)");
445 static int set_unicast_if(int sd, int ifindex, int version)
447 int opt = IP_UNICAST_IF;
451 ifindex = htonl(ifindex);
453 if (version == AF_INET6) {
454 opt = IPV6_UNICAST_IF;
457 rc = setsockopt(sd, level, opt, &ifindex, sizeof(ifindex));
459 log_err_errno("setsockopt(IP_UNICAST_IF)");
464 static int set_multicast_if(int sd, int ifindex)
466 struct ip_mreqn mreq = { .imr_ifindex = ifindex };
469 rc = setsockopt(sd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq));
471 log_err_errno("setsockopt(IP_MULTICAST_IF)");
476 static int set_membership(int sd, uint32_t grp, uint32_t addr, int ifindex)
478 uint32_t if_addr = addr;
479 struct ip_mreqn mreq;
482 if (addr == htonl(INADDR_ANY) && !ifindex) {
483 log_error("Either local address or device needs to be given for multicast membership\n");
487 mreq.imr_multiaddr.s_addr = grp;
488 mreq.imr_address.s_addr = if_addr;
489 mreq.imr_ifindex = ifindex;
491 rc = setsockopt(sd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
493 log_err_errno("setsockopt(IP_ADD_MEMBERSHIP)");
500 static int set_broadcast(int sd)
502 unsigned int one = 1;
505 if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) != 0) {
506 log_err_errno("setsockopt(SO_BROADCAST)");
513 static int set_reuseport(int sd)
515 unsigned int one = 1;
518 if (setsockopt(sd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) != 0) {
519 log_err_errno("setsockopt(SO_REUSEPORT)");
526 static int set_reuseaddr(int sd)
528 unsigned int one = 1;
531 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) != 0) {
532 log_err_errno("setsockopt(SO_REUSEADDR)");
539 static int str_to_uint(const char *str, int min, int max, unsigned int *value)
545 number = (unsigned int) strtoul(str, &end, 0);
547 /* entire string should be consumed by conversion
548 * and value should be between min and max
550 if (((*end == '\0') || (*end == '\n')) && (end != str) &&
551 (errno != ERANGE) && (min <= number) && (number <= max)) {
559 static int resolve_devices(struct sock_args *args)
562 args->ifindex = get_ifidx(args->dev);
563 if (args->ifindex < 0) {
564 log_error("Invalid device name\n");
569 if (args->expected_dev) {
572 if (str_to_uint(args->expected_dev, 0, INT_MAX, &tmp) == 0) {
573 args->expected_ifindex = (int)tmp;
575 args->expected_ifindex = get_ifidx(args->expected_dev);
576 if (args->expected_ifindex < 0) {
577 fprintf(stderr, "Invalid expected device\n");
586 static int expected_addr_match(struct sockaddr *sa, void *expected,
592 if (sa->sa_family == AF_INET) {
593 struct sockaddr_in *s = (struct sockaddr_in *) sa;
594 struct in_addr *exp_in = (struct in_addr *) expected;
596 if (s->sin_addr.s_addr != exp_in->s_addr) {
597 log_error("%s address does not match expected %s",
599 inet_ntop(AF_INET, exp_in,
600 addrstr, sizeof(addrstr)));
603 } else if (sa->sa_family == AF_INET6) {
604 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
605 struct in6_addr *exp_in = (struct in6_addr *) expected;
607 if (memcmp(&s6->sin6_addr, exp_in, sizeof(*exp_in))) {
608 log_error("%s address does not match expected %s",
610 inet_ntop(AF_INET6, exp_in,
611 addrstr, sizeof(addrstr)));
615 log_error("%s address does not match expected - unknown family",
621 log_msg("%s address matches expected\n", desc);
626 static int show_sockstat(int sd, struct sock_args *args)
628 struct sockaddr_in6 local_addr, remote_addr;
629 socklen_t alen = sizeof(local_addr);
634 desc = server_mode ? "server local:" : "client local:";
635 sa = (struct sockaddr *) &local_addr;
636 if (getsockname(sd, sa, &alen) == 0) {
637 log_address(desc, sa);
639 if (args->has_expected_laddr) {
640 rc = expected_addr_match(sa, &args->expected_laddr,
644 log_err_errno("getsockname failed");
647 sa = (struct sockaddr *) &remote_addr;
648 desc = server_mode ? "server peer:" : "client peer:";
649 if (getpeername(sd, sa, &alen) == 0) {
650 log_address(desc, sa);
652 if (args->has_expected_raddr) {
653 rc |= expected_addr_match(sa, &args->expected_raddr,
657 log_err_errno("getpeername failed");
667 ADDR_TYPE_EXPECTED_LOCAL,
668 ADDR_TYPE_EXPECTED_REMOTE,
669 ADDR_TYPE_MD5_PREFIX,
672 static int convert_addr(struct sock_args *args, const char *_str,
673 enum addr_type atype)
675 int pfx_len_max = args->version == AF_INET6 ? 128 : 32;
676 int family = args->version;
677 char *str, *dev, *sep;
678 struct in6_addr *in6;
689 case ADDR_TYPE_LOCAL:
691 addr = &args->local_addr;
693 case ADDR_TYPE_REMOTE:
695 addr = &args->remote_addr;
697 case ADDR_TYPE_MCAST:
701 case ADDR_TYPE_EXPECTED_LOCAL:
702 desc = "expected local";
703 addr = &args->expected_laddr;
705 case ADDR_TYPE_EXPECTED_REMOTE:
706 desc = "expected remote";
707 addr = &args->expected_raddr;
709 case ADDR_TYPE_MD5_PREFIX:
711 if (family == AF_INET) {
712 args->md5_prefix.v4.sin_family = AF_INET;
713 addr = &args->md5_prefix.v4.sin_addr;
714 } else if (family == AF_INET6) {
715 args->md5_prefix.v6.sin6_family = AF_INET6;
716 addr = &args->md5_prefix.v6.sin6_addr;
720 sep = strchr(str, '/');
724 if (str_to_uint(sep, 1, pfx_len_max,
725 &args->prefix_len) != 0) {
726 fprintf(stderr, "Invalid port\n");
730 args->prefix_len = pfx_len_max;
734 log_error("unknown address type");
740 in = (struct in_addr *) addr;
742 if (inet_pton(AF_INET, str, in) == 0) {
743 log_error("Invalid %s IP address\n", desc);
748 in->s_addr = htonl(INADDR_ANY);
753 dev = strchr(str, '%');
759 in6 = (struct in6_addr *) addr;
761 if (inet_pton(AF_INET6, str, in6) == 0) {
762 log_error("Invalid %s IPv6 address\n", desc);
770 args->scope_id = get_ifidx(dev);
771 if (args->scope_id < 0) {
772 log_error("Invalid scope on %s IPv6 address\n",
781 log_error("Invalid address family\n");
789 static int validate_addresses(struct sock_args *args)
791 if (args->local_addr_str &&
792 convert_addr(args, args->local_addr_str, ADDR_TYPE_LOCAL) < 0)
795 if (args->remote_addr_str &&
796 convert_addr(args, args->remote_addr_str, ADDR_TYPE_REMOTE) < 0)
799 if (args->md5_prefix_str &&
800 convert_addr(args, args->md5_prefix_str,
801 ADDR_TYPE_MD5_PREFIX) < 0)
804 if (args->expected_laddr_str &&
805 convert_addr(args, args->expected_laddr_str,
806 ADDR_TYPE_EXPECTED_LOCAL))
809 if (args->expected_raddr_str &&
810 convert_addr(args, args->expected_raddr_str,
811 ADDR_TYPE_EXPECTED_REMOTE))
817 static int get_index_from_cmsg(struct msghdr *m)
823 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(m);
824 m->msg_controllen != 0 && cm;
825 cm = (struct cmsghdr *)CMSG_NXTHDR(m, cm)) {
827 if (cm->cmsg_level == SOL_IP &&
828 cm->cmsg_type == IP_PKTINFO) {
829 struct in_pktinfo *pi;
831 pi = (struct in_pktinfo *)(CMSG_DATA(cm));
832 inet_ntop(AF_INET, &pi->ipi_addr, buf, sizeof(buf));
833 ifindex = pi->ipi_ifindex;
834 } else if (cm->cmsg_level == SOL_IPV6 &&
835 cm->cmsg_type == IPV6_PKTINFO) {
836 struct in6_pktinfo *pi6;
838 pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
839 inet_ntop(AF_INET6, &pi6->ipi6_addr, buf, sizeof(buf));
840 ifindex = pi6->ipi6_ifindex;
845 log_msg(" pktinfo: ifindex %d dest addr %s\n",
851 static int send_msg_no_cmsg(int sd, void *addr, socklen_t alen)
856 err = sendto(sd, msg, msglen, 0, addr, alen);
858 if (errno == EACCES && try_broadcast) {
860 if (!set_broadcast(sd))
865 log_err_errno("sendto failed");
872 static int send_msg_cmsg(int sd, void *addr, socklen_t alen,
873 int ifindex, int version)
875 unsigned char cmsgbuf[64];
881 iov[0].iov_base = msg;
882 iov[0].iov_len = msglen;
885 m.msg_name = (caddr_t)addr;
886 m.msg_namelen = alen;
888 memset(cmsgbuf, 0, sizeof(cmsgbuf));
889 cm = (struct cmsghdr *)cmsgbuf;
890 m.msg_control = (caddr_t)cm;
892 if (version == AF_INET) {
893 struct in_pktinfo *pi;
895 cm->cmsg_level = SOL_IP;
896 cm->cmsg_type = IP_PKTINFO;
897 cm->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
898 pi = (struct in_pktinfo *)(CMSG_DATA(cm));
899 pi->ipi_ifindex = ifindex;
901 m.msg_controllen = cm->cmsg_len;
903 } else if (version == AF_INET6) {
904 struct in6_pktinfo *pi6;
906 cm->cmsg_level = SOL_IPV6;
907 cm->cmsg_type = IPV6_PKTINFO;
908 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
910 pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
911 pi6->ipi6_ifindex = ifindex;
913 m.msg_controllen = cm->cmsg_len;
917 err = sendmsg(sd, &m, 0);
919 if (errno == EACCES && try_broadcast) {
921 if (!set_broadcast(sd))
926 log_err_errno("sendmsg failed");
934 static int send_msg(int sd, void *addr, socklen_t alen, struct sock_args *args)
936 if (args->type == SOCK_STREAM) {
937 if (write(sd, msg, msglen) < 0) {
938 log_err_errno("write failed sending msg to peer");
941 } else if (args->ifindex && args->use_cmsg) {
942 if (send_msg_cmsg(sd, addr, alen, args->ifindex, args->version))
945 if (send_msg_no_cmsg(sd, addr, alen))
949 log_msg("Sent message:\n");
950 log_msg(" %.24s%s\n", msg, msglen > 24 ? " ..." : "");
955 static int socket_read_dgram(int sd, struct sock_args *args)
957 unsigned char addr[sizeof(struct sockaddr_in6)];
958 struct sockaddr *sa = (struct sockaddr *) addr;
959 socklen_t alen = sizeof(addr);
962 .msg_name = (caddr_t)addr,
967 unsigned char cmsgbuf[256];
968 struct cmsghdr *cm = (struct cmsghdr *)cmsgbuf;
973 iov[0].iov_base = (caddr_t)buf;
974 iov[0].iov_len = sizeof(buf);
976 memset(cmsgbuf, 0, sizeof(cmsgbuf));
977 m.msg_control = (caddr_t)cm;
978 m.msg_controllen = sizeof(cmsgbuf);
980 len = recvmsg(sd, &m, 0);
982 log_msg("peer closed connection.\n");
984 } else if (len < 0) {
985 log_msg("failed to read message: %d: %s\n",
986 errno, strerror(errno));
992 log_address("Message from:", sa);
993 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
995 ifindex = get_index_from_cmsg(&m);
996 if (args->expected_ifindex) {
997 if (args->expected_ifindex != ifindex) {
998 log_error("Device index mismatch: expected %d have %d\n",
999 args->expected_ifindex, ifindex);
1002 log_msg("Device index matches: expected %d have %d\n",
1003 args->expected_ifindex, ifindex);
1006 if (!interactive && server_mode) {
1007 if (sa->sa_family == AF_INET6) {
1008 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
1009 struct in6_addr *in6 = &s6->sin6_addr;
1011 if (IN6_IS_ADDR_V4MAPPED(in6)) {
1012 const uint32_t *pa = (uint32_t *) &in6->s6_addr;
1014 struct sockaddr_in *sin;
1016 sin = (struct sockaddr_in *) addr;
1019 sin->sin_addr = in4;
1020 sin->sin_family = AF_INET;
1021 if (send_msg_cmsg(sd, addr, alen,
1022 ifindex, AF_INET) < 0)
1027 iov[0].iov_len = len;
1029 if (args->version == AF_INET6) {
1030 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
1033 /* avoid PKTINFO conflicts with bindtodev */
1034 if (sendto(sd, buf, len, 0,
1035 (void *) addr, alen) < 0)
1038 /* kernel is allowing scope_id to be set to VRF
1039 * index for LLA. for sends to global address
1042 s6->sin6_scope_id = ifindex;
1043 if (sendmsg(sd, &m, 0) < 0)
1049 err = sendmsg(sd, &m, 0);
1051 if (errno == EACCES && try_broadcast) {
1053 if (!set_broadcast(sd))
1060 log_msg("Sent message:\n");
1061 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1066 log_err_errno("failed to send msg to peer");
1070 static int socket_read_stream(int sd)
1075 len = read(sd, buf, sizeof(buf)-1);
1077 log_msg("client closed connection.\n");
1079 } else if (len < 0) {
1080 log_msg("failed to read message\n");
1085 log_msg("Incoming message:\n");
1086 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1088 if (!interactive && server_mode) {
1089 if (write(sd, buf, len) < 0) {
1090 log_err_errno("failed to send buf");
1093 log_msg("Sent message:\n");
1094 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1100 static int socket_read(int sd, struct sock_args *args)
1102 if (args->type == SOCK_STREAM)
1103 return socket_read_stream(sd);
1105 return socket_read_dgram(sd, args);
1108 static int stdin_to_socket(int sd, int type, void *addr, socklen_t alen)
1113 if (fgets(buf, sizeof(buf), stdin) == NULL)
1117 if (type == SOCK_STREAM) {
1118 if (write(sd, buf, len) < 0) {
1119 log_err_errno("failed to send buf");
1126 err = sendto(sd, buf, len, 0, addr, alen);
1128 if (errno == EACCES && try_broadcast) {
1130 if (!set_broadcast(sd))
1134 log_err_errno("failed to send msg to peer");
1138 log_msg("Sent message:\n");
1139 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1144 static void set_recv_attr(int sd, int version)
1146 if (version == AF_INET6) {
1147 set_recvpktinfo_v6(sd);
1155 static int msg_loop(int client, int sd, void *addr, socklen_t alen,
1156 struct sock_args *args)
1158 struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
1163 if (args->type != SOCK_STREAM)
1164 set_recv_attr(sd, args->version);
1167 msglen = strlen(msg);
1169 /* client sends first message */
1171 if (send_msg(sd, addr, alen, args))
1181 nfds = interactive ? MAX(fileno(stdin), sd) + 1 : sd + 1;
1186 FD_SET(fileno(stdin), &rfds);
1188 rc = select(nfds, &rfds, NULL, NULL, ptval);
1194 log_err_errno("select failed");
1196 } else if (rc == 0) {
1197 log_error("Timed out waiting for response\n");
1202 if (FD_ISSET(sd, &rfds)) {
1203 rc = socket_read(sd, args);
1214 if (FD_ISSET(fileno(stdin), &rfds)) {
1215 if (stdin_to_socket(sd, args->type, addr, alen) <= 0)
1228 log_msg("Going into quiet mode\n");
1232 if (send_msg(sd, addr, alen, args)) {
1242 static int msock_init(struct sock_args *args, int server)
1244 uint32_t if_addr = htonl(INADDR_ANY);
1245 struct sockaddr_in laddr = {
1246 .sin_family = AF_INET,
1247 .sin_port = htons(args->port),
1252 if (!server && args->has_local_ip)
1253 if_addr = args->local_addr.in.s_addr;
1255 sd = socket(PF_INET, SOCK_DGRAM, 0);
1257 log_err_errno("socket");
1261 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR,
1262 (char *)&one, sizeof(one)) < 0) {
1263 log_err_errno("Setting SO_REUSEADDR error");
1267 if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST,
1268 (char *)&one, sizeof(one)) < 0)
1269 log_err_errno("Setting SO_BROADCAST error");
1271 if (args->dev && bind_to_device(sd, args->dev) != 0)
1273 else if (args->use_setsockopt &&
1274 set_multicast_if(sd, args->ifindex))
1277 laddr.sin_addr.s_addr = if_addr;
1279 if (bind(sd, (struct sockaddr *) &laddr, sizeof(laddr)) < 0) {
1280 log_err_errno("bind failed");
1285 set_membership(sd, args->grp.s_addr,
1286 args->local_addr.in.s_addr, args->ifindex))
1295 static int msock_server(struct sock_args *args)
1297 return msock_init(args, 1);
1300 static int msock_client(struct sock_args *args)
1302 return msock_init(args, 0);
1305 static int bind_socket(int sd, struct sock_args *args)
1307 struct sockaddr_in serv_addr = {
1308 .sin_family = AF_INET,
1310 struct sockaddr_in6 serv6_addr = {
1311 .sin6_family = AF_INET6,
1316 if (!args->has_local_ip && args->type == SOCK_RAW)
1319 switch (args->version) {
1321 serv_addr.sin_port = htons(args->port);
1322 serv_addr.sin_addr = args->local_addr.in;
1324 alen = sizeof(serv_addr);
1328 serv6_addr.sin6_port = htons(args->port);
1329 serv6_addr.sin6_addr = args->local_addr.in6;
1331 alen = sizeof(serv6_addr);
1335 log_error("Invalid address family\n");
1339 if (bind(sd, addr, alen) < 0) {
1340 log_err_errno("error binding socket");
1347 static int lsock_init(struct sock_args *args)
1352 sd = socket(args->version, args->type, args->protocol);
1354 log_err_errno("Error opening socket");
1358 if (set_reuseaddr(sd) != 0)
1361 if (set_reuseport(sd) != 0)
1364 if (args->dev && bind_to_device(sd, args->dev) != 0)
1366 else if (args->use_setsockopt &&
1367 set_unicast_if(sd, args->ifindex, args->version))
1370 if (bind_socket(sd, args))
1373 if (args->bind_test_only)
1376 if (args->type == SOCK_STREAM && listen(sd, 1) < 0) {
1377 log_err_errno("listen failed");
1381 flags = fcntl(sd, F_GETFL);
1382 if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
1383 log_err_errno("Failed to set non-blocking option");
1387 if (fcntl(sd, F_SETFD, FD_CLOEXEC) < 0)
1388 log_err_errno("Failed to set close-on-exec flag");
1398 static void ipc_write(int fd, int message)
1400 /* Not in both_mode, so there's no process to signal */
1404 if (write(fd, &message, sizeof(message)) < 0)
1405 log_err_errno("Failed to send client status");
1408 static int do_server(struct sock_args *args, int ipc_fd)
1410 /* ipc_fd = -1 if no parent process to signal */
1411 struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
1412 unsigned char addr[sizeof(struct sockaddr_in6)] = {};
1413 socklen_t alen = sizeof(addr);
1419 if (args->serverns) {
1420 if (switch_ns(args->serverns)) {
1421 log_error("Could not set server netns to %s\n",
1425 log_msg("Switched server netns\n");
1428 if (resolve_devices(args) || validate_addresses(args))
1435 lsd = msock_server(args);
1437 lsd = lsock_init(args);
1442 if (args->bind_test_only) {
1444 ipc_write(ipc_fd, 1);
1448 if (args->type != SOCK_STREAM) {
1449 ipc_write(ipc_fd, 1);
1450 rc = msg_loop(0, lsd, (void *) addr, alen, args);
1455 if (args->password && tcp_md5_remote(lsd, args)) {
1460 ipc_write(ipc_fd, 1);
1463 log_msg("waiting for client connection.\n");
1467 rc = select(lsd+1, &rfds, NULL, NULL, ptval);
1477 log_err_errno("select failed");
1481 if (FD_ISSET(lsd, &rfds)) {
1483 csd = accept(lsd, (void *) addr, &alen);
1485 log_err_errno("accept failed");
1489 rc = show_sockstat(csd, args);
1493 rc = check_device(csd, args);
1498 rc = msg_loop(0, csd, (void *) addr, alen, args);
1509 ipc_write(ipc_fd, 0);
1513 static int wait_for_connect(int sd)
1515 struct timeval _tv = { .tv_sec = prog_timeout }, *tv = NULL;
1517 int val = 0, sz = sizeof(val);
1526 rc = select(FD_SETSIZE, NULL, &wfd, NULL, tv);
1528 log_error("connect timed out\n");
1530 } else if (rc < 0) {
1531 log_err_errno("select failed");
1535 if (getsockopt(sd, SOL_SOCKET, SO_ERROR, &val, (socklen_t *)&sz) < 0) {
1536 log_err_errno("getsockopt(SO_ERROR) failed");
1541 log_error("connect failed: %d: %s\n", val, strerror(val));
1548 static int connectsock(void *addr, socklen_t alen, struct sock_args *args)
1553 sd = socket(args->version, args->type, args->protocol);
1555 log_err_errno("Failed to create socket");
1559 flags = fcntl(sd, F_GETFL);
1560 if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
1561 log_err_errno("Failed to set non-blocking option");
1565 if (set_reuseport(sd) != 0)
1568 if (args->dev && bind_to_device(sd, args->dev) != 0)
1570 else if (args->use_setsockopt &&
1571 set_unicast_if(sd, args->ifindex, args->version))
1574 if (args->has_local_ip && bind_socket(sd, args))
1577 if (args->type != SOCK_STREAM)
1580 if (args->password && tcp_md5sig(sd, addr, alen, args))
1583 if (args->bind_test_only)
1586 if (connect(sd, addr, alen) < 0) {
1587 if (errno != EINPROGRESS) {
1588 log_err_errno("Failed to connect to remote host");
1592 rc = wait_for_connect(sd);
1604 static int do_client(struct sock_args *args)
1606 struct sockaddr_in sin = {
1607 .sin_family = AF_INET,
1609 struct sockaddr_in6 sin6 = {
1610 .sin6_family = AF_INET6,
1617 if (!args->has_remote_ip && !args->has_grp) {
1618 fprintf(stderr, "remote IP or multicast group not given\n");
1622 if (args->clientns) {
1623 if (switch_ns(args->clientns)) {
1624 log_error("Could not set client netns to %s\n",
1628 log_msg("Switched client netns\n");
1631 if (resolve_devices(args) || validate_addresses(args))
1634 if ((args->use_setsockopt || args->use_cmsg) && !args->ifindex) {
1635 fprintf(stderr, "Device binding not specified\n");
1638 if (args->use_setsockopt || args->use_cmsg)
1641 switch (args->version) {
1643 sin.sin_port = htons(args->port);
1645 sin.sin_addr = args->grp;
1647 sin.sin_addr = args->remote_addr.in;
1652 sin6.sin6_port = htons(args->port);
1653 sin6.sin6_addr = args->remote_addr.in6;
1654 sin6.sin6_scope_id = args->scope_id;
1656 alen = sizeof(sin6);
1661 sd = msock_client(args);
1663 sd = connectsock(addr, alen, args);
1668 if (args->bind_test_only)
1671 if (args->type == SOCK_STREAM) {
1672 rc = show_sockstat(sd, args);
1677 rc = msg_loop(1, sd, addr, alen, args);
1685 static char *random_msg(int len)
1687 int i, n = 0, olen = len + 1;
1698 i = snprintf(m + n, olen - n, "%.26s",
1699 "abcdefghijklmnopqrstuvwxyz");
1703 i = snprintf(m + n, olen - n, "%.*s", len,
1704 "abcdefghijklmnopqrstuvwxyz");
1708 static int ipc_child(int fd, struct sock_args *args)
1710 server_mode = 1; /* to tell log_msg in case we are in both_mode */
1712 return do_server(args, fd);
1715 static int ipc_parent(int cpid, int fd, struct sock_args *args)
1721 /* do the client-side function here in the parent process,
1722 * waiting to be told when to continue
1724 if (read(fd, &buf, sizeof(buf)) <= 0) {
1725 log_err_errno("Failed to read IPC status from status");
1729 log_error("Server failed; can not continue\n");
1732 log_msg("Server is ready\n");
1734 client_status = do_client(args);
1735 log_msg("parent is done!\n");
1737 if (kill(cpid, 0) == 0)
1738 kill(cpid, SIGKILL);
1741 return client_status;
1744 #define GETOPT_STR "sr:l:p:t:g:P:DRn:M:m:d:BN:O:SCi6L:0:1:2:Fbq"
1746 static void print_usage(char *prog)
1751 " -r addr remote address to connect to (client mode only)\n"
1752 " -p port port to connect to (client mode)/listen on (server mode)\n"
1754 " -s server mode (default: client mode)\n"
1755 " -t timeout seconds (default: none)\n"
1758 " -B do both client and server via fork and IPC\n"
1759 " -N ns set client to network namespace ns (requires root)\n"
1760 " -O ns set server to network namespace ns (requires root)\n"
1761 " -F Restart server loop\n"
1762 " -6 IPv6 (default is IPv4)\n"
1763 " -P proto protocol for socket: icmp, ospf (default: none)\n"
1764 " -D|R datagram (D) / raw (R) socket (default stream)\n"
1765 " -l addr local address to bind to\n"
1767 " -d dev bind socket to given device name\n"
1768 " -S use setsockopt (IP_UNICAST_IF or IP_MULTICAST_IF)\n"
1769 " to set device binding\n"
1770 " -C use cmsg and IP_PKTINFO to specify device binding\n"
1772 " -L len send random message of given length\n"
1773 " -n num number of times to send message\n"
1775 " -M password use MD5 sum protection\n"
1776 " -m prefix/len prefix and length to use for MD5 key\n"
1777 " -g grp multicast group (e.g., 239.1.1.1)\n"
1778 " -i interactive mode (default is echo and terminate)\n"
1780 " -0 addr Expected local address\n"
1781 " -1 addr Expected remote address\n"
1782 " -2 dev Expected device name (or index) to receive packet\n"
1784 " -b Bind test only.\n"
1785 " -q Be quiet. Run test without printing anything.\n"
1786 , prog, DEFAULT_PORT);
1789 int main(int argc, char *argv[])
1791 struct sock_args args = {
1793 .type = SOCK_STREAM,
1794 .port = DEFAULT_PORT,
1796 struct protoent *pe;
1803 /* process inputs */
1804 extern char *optarg;
1808 * process input args
1811 while ((rc = getopt(argc, argv, GETOPT_STR)) != -1) {
1823 args.has_local_ip = 1;
1824 args.local_addr_str = optarg;
1827 args.has_remote_ip = 1;
1828 args.remote_addr_str = optarg;
1831 if (str_to_uint(optarg, 1, 65535, &tmp) != 0) {
1832 fprintf(stderr, "Invalid port\n");
1835 args.port = (unsigned short) tmp;
1838 if (str_to_uint(optarg, 0, INT_MAX,
1839 &prog_timeout) != 0) {
1840 fprintf(stderr, "Invalid timeout\n");
1845 args.type = SOCK_DGRAM;
1848 args.type = SOCK_RAW;
1851 args.protocol = IPPROTO_RAW;
1854 pe = getprotobyname(optarg);
1856 args.protocol = pe->p_proto;
1858 if (str_to_uint(optarg, 0, 0xffff, &tmp) != 0) {
1859 fprintf(stderr, "Invalid protocol\n");
1862 args.protocol = tmp;
1866 iter = atoi(optarg);
1869 args.clientns = optarg;
1872 args.serverns = optarg;
1875 msg = random_msg(atoi(optarg));
1878 args.password = optarg;
1881 args.md5_prefix_str = optarg;
1884 args.use_setsockopt = 1;
1897 if (convert_addr(&args, optarg, ADDR_TYPE_MCAST) < 0)
1899 args.type = SOCK_DGRAM;
1902 args.version = AF_INET6;
1905 args.bind_test_only = 1;
1908 args.has_expected_laddr = 1;
1909 args.expected_laddr_str = optarg;
1912 args.has_expected_raddr = 1;
1913 args.expected_raddr_str = optarg;
1916 args.expected_dev = optarg;
1922 print_usage(argv[0]);
1927 if (args.password &&
1928 ((!args.has_remote_ip && !args.md5_prefix_str) ||
1929 args.type != SOCK_STREAM)) {
1930 log_error("MD5 passwords apply to TCP only and require a remote ip for the password\n");
1934 if (args.md5_prefix_str && !args.password) {
1935 log_error("Prefix range for MD5 protection specified without a password\n");
1940 fprintf(stderr, "Invalid number of messages to send\n");
1944 if (args.type == SOCK_STREAM && !args.protocol)
1945 args.protocol = IPPROTO_TCP;
1946 if (args.type == SOCK_DGRAM && !args.protocol)
1947 args.protocol = IPPROTO_UDP;
1949 if ((args.type == SOCK_STREAM || args.type == SOCK_DGRAM) &&
1951 fprintf(stderr, "Invalid port number\n");
1955 if ((both_mode || !server_mode) && !args.has_grp &&
1956 !args.has_remote_ip && !args.has_local_ip) {
1958 "Local (server mode) or remote IP (client IP) required\n");
1979 return ipc_parent(cpid, fd[0], &args);
1981 return ipc_child(fd[1], &args);
1986 rc = do_server(&args, -1);
1991 return do_client(&args);