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;
51 const char *client_local_addr_str;
58 const char *remote_addr_str;
63 int scope_id; /* remote scope; v6 send only */
65 struct in_addr grp; /* multicast group */
67 unsigned int has_local_ip:1,
76 int type; /* DGRAM, STREAM, RAW */
78 int version; /* AF_INET/AF_INET6 */
83 const char *server_dev;
90 const char *client_pw;
91 /* prefix for MD5 password */
92 const char *md5_prefix_str;
94 struct sockaddr_in v4;
95 struct sockaddr_in6 v6;
97 unsigned int prefix_len;
99 /* expected addresses and device index for connection */
100 const char *expected_dev;
101 const char *expected_server_dev;
102 int expected_ifindex;
105 const char *expected_laddr_str;
112 const char *expected_raddr_str;
119 static int server_mode;
120 static unsigned int prog_timeout = 5;
121 static unsigned int interactive;
123 static char *msg = "Hello world!";
126 static int try_broadcast = 1;
128 static char *timestamp(char *timebuf, int buflen)
133 if (strftime(timebuf, buflen, "%T", localtime(&now)) == 0) {
134 memset(timebuf, 0, buflen);
135 strncpy(timebuf, "00:00:00", buflen-1);
141 static void log_msg(const char *format, ...)
149 fprintf(stdout, "%s %s:",
150 timestamp(timebuf, sizeof(timebuf)),
151 server_mode ? "server" : "client");
152 va_start(args, format);
153 vfprintf(stdout, format, args);
159 static void log_error(const char *format, ...)
167 fprintf(stderr, "%s %s:",
168 timestamp(timebuf, sizeof(timebuf)),
169 server_mode ? "server" : "client");
170 va_start(args, format);
171 vfprintf(stderr, format, args);
177 static void log_err_errno(const char *fmt, ...)
185 fprintf(stderr, "%s %s: ",
186 timestamp(timebuf, sizeof(timebuf)),
187 server_mode ? "server" : "client");
189 vfprintf(stderr, fmt, args);
192 fprintf(stderr, ": %d: %s\n", errno, strerror(errno));
196 static void log_address(const char *desc, struct sockaddr *sa)
203 if (sa->sa_family == AF_INET) {
204 struct sockaddr_in *s = (struct sockaddr_in *) sa;
206 log_msg("%s %s:%d\n",
208 inet_ntop(AF_INET, &s->sin_addr, addrstr,
212 } else if (sa->sa_family == AF_INET6) {
213 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
215 log_msg("%s [%s]:%d\n",
217 inet_ntop(AF_INET6, &s6->sin6_addr, addrstr,
219 ntohs(s6->sin6_port));
225 static int switch_ns(const char *ns)
231 log_error("warning: likely need root to set netns %s!\n", ns);
233 snprintf(path, sizeof(path), "%s%s", NS_PREFIX, ns);
236 log_err_errno("Failed to open netns path; can not switch netns");
240 ret = setns(fd, CLONE_NEWNET);
246 static int tcp_md5sig(int sd, void *addr, socklen_t alen, struct sock_args *args)
248 int keylen = strlen(args->password);
249 struct tcp_md5sig md5sig = {};
250 int opt = TCP_MD5SIG;
253 md5sig.tcpm_keylen = keylen;
254 memcpy(md5sig.tcpm_key, args->password, keylen);
256 if (args->prefix_len) {
257 opt = TCP_MD5SIG_EXT;
258 md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_PREFIX;
260 md5sig.tcpm_prefixlen = args->prefix_len;
261 addr = &args->md5_prefix;
263 memcpy(&md5sig.tcpm_addr, addr, alen);
266 opt = TCP_MD5SIG_EXT;
267 md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_IFINDEX;
269 md5sig.tcpm_ifindex = args->ifindex;
272 rc = setsockopt(sd, IPPROTO_TCP, opt, &md5sig, sizeof(md5sig));
274 /* ENOENT is harmless. Returned when a password is cleared */
278 log_err_errno("setsockopt(TCP_MD5SIG)");
284 static int tcp_md5_remote(int sd, struct sock_args *args)
286 struct sockaddr_in sin = {
287 .sin_family = AF_INET,
289 struct sockaddr_in6 sin6 = {
290 .sin6_family = AF_INET6,
295 switch (args->version) {
297 sin.sin_port = htons(args->port);
298 sin.sin_addr = args->md5_prefix.v4.sin_addr;
303 sin6.sin6_port = htons(args->port);
304 sin6.sin6_addr = args->md5_prefix.v6.sin6_addr;
309 log_error("unknown address family\n");
313 if (tcp_md5sig(sd, addr, alen, args))
319 static int get_ifidx(const char *ifname)
324 if (!ifname || *ifname == '\0')
327 memset(&ifdata, 0, sizeof(ifdata));
329 strcpy(ifdata.ifr_name, ifname);
331 sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
333 log_err_errno("socket failed");
337 rc = ioctl(sd, SIOCGIFINDEX, (char *)&ifdata);
340 log_err_errno("ioctl(SIOCGIFINDEX) failed");
344 return ifdata.ifr_ifindex;
347 static int bind_to_device(int sd, const char *name)
351 rc = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, strlen(name)+1);
353 log_err_errno("setsockopt(SO_BINDTODEVICE)");
358 static int get_bind_to_device(int sd, char *name, size_t len)
361 socklen_t optlen = len;
364 rc = getsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, &optlen);
366 log_err_errno("setsockopt(SO_BINDTODEVICE)");
371 static int check_device(int sd, struct sock_args *args)
376 if (get_bind_to_device(sd, name, sizeof(name)))
379 ifindex = get_ifidx(name);
381 log_msg(" bound to device %s/%d\n",
382 *name ? name : "<none>", ifindex);
384 if (!args->expected_ifindex)
387 if (args->expected_ifindex != ifindex) {
388 log_error("Device index mismatch: expected %d have %d\n",
389 args->expected_ifindex, ifindex);
393 log_msg("Device index matches: expected %d have %d\n",
394 args->expected_ifindex, ifindex);
399 static int set_pktinfo_v4(int sd)
404 rc = setsockopt(sd, SOL_IP, IP_PKTINFO, &one, sizeof(one));
405 if (rc < 0 && rc != -ENOTSUP)
406 log_err_errno("setsockopt(IP_PKTINFO)");
411 static int set_recvpktinfo_v6(int sd)
416 rc = setsockopt(sd, SOL_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
417 if (rc < 0 && rc != -ENOTSUP)
418 log_err_errno("setsockopt(IPV6_RECVPKTINFO)");
423 static int set_recverr_v4(int sd)
428 rc = setsockopt(sd, SOL_IP, IP_RECVERR, &one, sizeof(one));
429 if (rc < 0 && rc != -ENOTSUP)
430 log_err_errno("setsockopt(IP_RECVERR)");
435 static int set_recverr_v6(int sd)
440 rc = setsockopt(sd, SOL_IPV6, IPV6_RECVERR, &one, sizeof(one));
441 if (rc < 0 && rc != -ENOTSUP)
442 log_err_errno("setsockopt(IPV6_RECVERR)");
447 static int set_unicast_if(int sd, int ifindex, int version)
449 int opt = IP_UNICAST_IF;
453 ifindex = htonl(ifindex);
455 if (version == AF_INET6) {
456 opt = IPV6_UNICAST_IF;
459 rc = setsockopt(sd, level, opt, &ifindex, sizeof(ifindex));
461 log_err_errno("setsockopt(IP_UNICAST_IF)");
466 static int set_multicast_if(int sd, int ifindex)
468 struct ip_mreqn mreq = { .imr_ifindex = ifindex };
471 rc = setsockopt(sd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq));
473 log_err_errno("setsockopt(IP_MULTICAST_IF)");
478 static int set_membership(int sd, uint32_t grp, uint32_t addr, int ifindex)
480 uint32_t if_addr = addr;
481 struct ip_mreqn mreq;
484 if (addr == htonl(INADDR_ANY) && !ifindex) {
485 log_error("Either local address or device needs to be given for multicast membership\n");
489 mreq.imr_multiaddr.s_addr = grp;
490 mreq.imr_address.s_addr = if_addr;
491 mreq.imr_ifindex = ifindex;
493 rc = setsockopt(sd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
495 log_err_errno("setsockopt(IP_ADD_MEMBERSHIP)");
502 static int set_broadcast(int sd)
504 unsigned int one = 1;
507 if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) != 0) {
508 log_err_errno("setsockopt(SO_BROADCAST)");
515 static int set_reuseport(int sd)
517 unsigned int one = 1;
520 if (setsockopt(sd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) != 0) {
521 log_err_errno("setsockopt(SO_REUSEPORT)");
528 static int set_reuseaddr(int sd)
530 unsigned int one = 1;
533 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) != 0) {
534 log_err_errno("setsockopt(SO_REUSEADDR)");
541 static int str_to_uint(const char *str, int min, int max, unsigned int *value)
547 number = (unsigned int) strtoul(str, &end, 0);
549 /* entire string should be consumed by conversion
550 * and value should be between min and max
552 if (((*end == '\0') || (*end == '\n')) && (end != str) &&
553 (errno != ERANGE) && (min <= number) && (number <= max)) {
561 static int resolve_devices(struct sock_args *args)
564 args->ifindex = get_ifidx(args->dev);
565 if (args->ifindex < 0) {
566 log_error("Invalid device name\n");
571 if (args->expected_dev) {
574 if (str_to_uint(args->expected_dev, 0, INT_MAX, &tmp) == 0) {
575 args->expected_ifindex = (int)tmp;
577 args->expected_ifindex = get_ifidx(args->expected_dev);
578 if (args->expected_ifindex < 0) {
579 fprintf(stderr, "Invalid expected device\n");
588 static int expected_addr_match(struct sockaddr *sa, void *expected,
594 if (sa->sa_family == AF_INET) {
595 struct sockaddr_in *s = (struct sockaddr_in *) sa;
596 struct in_addr *exp_in = (struct in_addr *) expected;
598 if (s->sin_addr.s_addr != exp_in->s_addr) {
599 log_error("%s address does not match expected %s\n",
601 inet_ntop(AF_INET, exp_in,
602 addrstr, sizeof(addrstr)));
605 } else if (sa->sa_family == AF_INET6) {
606 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
607 struct in6_addr *exp_in = (struct in6_addr *) expected;
609 if (memcmp(&s6->sin6_addr, exp_in, sizeof(*exp_in))) {
610 log_error("%s address does not match expected %s\n",
612 inet_ntop(AF_INET6, exp_in,
613 addrstr, sizeof(addrstr)));
617 log_error("%s address does not match expected - unknown family\n",
623 log_msg("%s address matches expected\n", desc);
628 static int show_sockstat(int sd, struct sock_args *args)
630 struct sockaddr_in6 local_addr, remote_addr;
631 socklen_t alen = sizeof(local_addr);
636 desc = server_mode ? "server local:" : "client local:";
637 sa = (struct sockaddr *) &local_addr;
638 if (getsockname(sd, sa, &alen) == 0) {
639 log_address(desc, sa);
641 if (args->has_expected_laddr) {
642 rc = expected_addr_match(sa, &args->expected_laddr,
646 log_err_errno("getsockname failed");
649 sa = (struct sockaddr *) &remote_addr;
650 desc = server_mode ? "server peer:" : "client peer:";
651 if (getpeername(sd, sa, &alen) == 0) {
652 log_address(desc, sa);
654 if (args->has_expected_raddr) {
655 rc |= expected_addr_match(sa, &args->expected_raddr,
659 log_err_errno("getpeername failed");
669 ADDR_TYPE_EXPECTED_LOCAL,
670 ADDR_TYPE_EXPECTED_REMOTE,
671 ADDR_TYPE_MD5_PREFIX,
674 static int convert_addr(struct sock_args *args, const char *_str,
675 enum addr_type atype)
677 int pfx_len_max = args->version == AF_INET6 ? 128 : 32;
678 int family = args->version;
679 char *str, *dev, *sep;
680 struct in6_addr *in6;
691 case ADDR_TYPE_LOCAL:
693 addr = &args->local_addr;
695 case ADDR_TYPE_REMOTE:
697 addr = &args->remote_addr;
699 case ADDR_TYPE_MCAST:
703 case ADDR_TYPE_EXPECTED_LOCAL:
704 desc = "expected local";
705 addr = &args->expected_laddr;
707 case ADDR_TYPE_EXPECTED_REMOTE:
708 desc = "expected remote";
709 addr = &args->expected_raddr;
711 case ADDR_TYPE_MD5_PREFIX:
713 if (family == AF_INET) {
714 args->md5_prefix.v4.sin_family = AF_INET;
715 addr = &args->md5_prefix.v4.sin_addr;
716 } else if (family == AF_INET6) {
717 args->md5_prefix.v6.sin6_family = AF_INET6;
718 addr = &args->md5_prefix.v6.sin6_addr;
722 sep = strchr(str, '/');
726 if (str_to_uint(sep, 1, pfx_len_max,
727 &args->prefix_len) != 0) {
728 fprintf(stderr, "Invalid port\n");
732 args->prefix_len = 0;
736 log_error("unknown address type\n");
742 in = (struct in_addr *) addr;
744 if (inet_pton(AF_INET, str, in) == 0) {
745 log_error("Invalid %s IP address\n", desc);
750 in->s_addr = htonl(INADDR_ANY);
755 dev = strchr(str, '%');
761 in6 = (struct in6_addr *) addr;
763 if (inet_pton(AF_INET6, str, in6) == 0) {
764 log_error("Invalid %s IPv6 address\n", desc);
772 args->scope_id = get_ifidx(dev);
773 if (args->scope_id < 0) {
774 log_error("Invalid scope on %s IPv6 address\n",
783 log_error("Invalid address family\n");
791 static int validate_addresses(struct sock_args *args)
793 if (args->local_addr_str &&
794 convert_addr(args, args->local_addr_str, ADDR_TYPE_LOCAL) < 0)
797 if (args->remote_addr_str &&
798 convert_addr(args, args->remote_addr_str, ADDR_TYPE_REMOTE) < 0)
801 if (args->md5_prefix_str &&
802 convert_addr(args, args->md5_prefix_str,
803 ADDR_TYPE_MD5_PREFIX) < 0)
806 if (args->expected_laddr_str &&
807 convert_addr(args, args->expected_laddr_str,
808 ADDR_TYPE_EXPECTED_LOCAL))
811 if (args->expected_raddr_str &&
812 convert_addr(args, args->expected_raddr_str,
813 ADDR_TYPE_EXPECTED_REMOTE))
819 static int get_index_from_cmsg(struct msghdr *m)
825 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(m);
826 m->msg_controllen != 0 && cm;
827 cm = (struct cmsghdr *)CMSG_NXTHDR(m, cm)) {
829 if (cm->cmsg_level == SOL_IP &&
830 cm->cmsg_type == IP_PKTINFO) {
831 struct in_pktinfo *pi;
833 pi = (struct in_pktinfo *)(CMSG_DATA(cm));
834 inet_ntop(AF_INET, &pi->ipi_addr, buf, sizeof(buf));
835 ifindex = pi->ipi_ifindex;
836 } else if (cm->cmsg_level == SOL_IPV6 &&
837 cm->cmsg_type == IPV6_PKTINFO) {
838 struct in6_pktinfo *pi6;
840 pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
841 inet_ntop(AF_INET6, &pi6->ipi6_addr, buf, sizeof(buf));
842 ifindex = pi6->ipi6_ifindex;
847 log_msg(" pktinfo: ifindex %d dest addr %s\n",
853 static int send_msg_no_cmsg(int sd, void *addr, socklen_t alen)
858 err = sendto(sd, msg, msglen, 0, addr, alen);
860 if (errno == EACCES && try_broadcast) {
862 if (!set_broadcast(sd))
867 log_err_errno("sendto failed");
874 static int send_msg_cmsg(int sd, void *addr, socklen_t alen,
875 int ifindex, int version)
877 unsigned char cmsgbuf[64];
883 iov[0].iov_base = msg;
884 iov[0].iov_len = msglen;
887 m.msg_name = (caddr_t)addr;
888 m.msg_namelen = alen;
890 memset(cmsgbuf, 0, sizeof(cmsgbuf));
891 cm = (struct cmsghdr *)cmsgbuf;
892 m.msg_control = (caddr_t)cm;
894 if (version == AF_INET) {
895 struct in_pktinfo *pi;
897 cm->cmsg_level = SOL_IP;
898 cm->cmsg_type = IP_PKTINFO;
899 cm->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
900 pi = (struct in_pktinfo *)(CMSG_DATA(cm));
901 pi->ipi_ifindex = ifindex;
903 m.msg_controllen = cm->cmsg_len;
905 } else if (version == AF_INET6) {
906 struct in6_pktinfo *pi6;
908 cm->cmsg_level = SOL_IPV6;
909 cm->cmsg_type = IPV6_PKTINFO;
910 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
912 pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
913 pi6->ipi6_ifindex = ifindex;
915 m.msg_controllen = cm->cmsg_len;
919 err = sendmsg(sd, &m, 0);
921 if (errno == EACCES && try_broadcast) {
923 if (!set_broadcast(sd))
928 log_err_errno("sendmsg failed");
936 static int send_msg(int sd, void *addr, socklen_t alen, struct sock_args *args)
938 if (args->type == SOCK_STREAM) {
939 if (write(sd, msg, msglen) < 0) {
940 log_err_errno("write failed sending msg to peer");
943 } else if (args->ifindex && args->use_cmsg) {
944 if (send_msg_cmsg(sd, addr, alen, args->ifindex, args->version))
947 if (send_msg_no_cmsg(sd, addr, alen))
951 log_msg("Sent message:\n");
952 log_msg(" %.24s%s\n", msg, msglen > 24 ? " ..." : "");
957 static int socket_read_dgram(int sd, struct sock_args *args)
959 unsigned char addr[sizeof(struct sockaddr_in6)];
960 struct sockaddr *sa = (struct sockaddr *) addr;
961 socklen_t alen = sizeof(addr);
964 .msg_name = (caddr_t)addr,
969 unsigned char cmsgbuf[256];
970 struct cmsghdr *cm = (struct cmsghdr *)cmsgbuf;
975 iov[0].iov_base = (caddr_t)buf;
976 iov[0].iov_len = sizeof(buf);
978 memset(cmsgbuf, 0, sizeof(cmsgbuf));
979 m.msg_control = (caddr_t)cm;
980 m.msg_controllen = sizeof(cmsgbuf);
982 len = recvmsg(sd, &m, 0);
984 log_msg("peer closed connection.\n");
986 } else if (len < 0) {
987 log_msg("failed to read message: %d: %s\n",
988 errno, strerror(errno));
994 log_address("Message from:", sa);
995 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
997 ifindex = get_index_from_cmsg(&m);
998 if (args->expected_ifindex) {
999 if (args->expected_ifindex != ifindex) {
1000 log_error("Device index mismatch: expected %d have %d\n",
1001 args->expected_ifindex, ifindex);
1004 log_msg("Device index matches: expected %d have %d\n",
1005 args->expected_ifindex, ifindex);
1008 if (!interactive && server_mode) {
1009 if (sa->sa_family == AF_INET6) {
1010 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
1011 struct in6_addr *in6 = &s6->sin6_addr;
1013 if (IN6_IS_ADDR_V4MAPPED(in6)) {
1014 const uint32_t *pa = (uint32_t *) &in6->s6_addr;
1016 struct sockaddr_in *sin;
1018 sin = (struct sockaddr_in *) addr;
1021 sin->sin_addr = in4;
1022 sin->sin_family = AF_INET;
1023 if (send_msg_cmsg(sd, addr, alen,
1024 ifindex, AF_INET) < 0)
1029 iov[0].iov_len = len;
1031 if (args->version == AF_INET6) {
1032 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
1035 /* avoid PKTINFO conflicts with bindtodev */
1036 if (sendto(sd, buf, len, 0,
1037 (void *) addr, alen) < 0)
1040 /* kernel is allowing scope_id to be set to VRF
1041 * index for LLA. for sends to global address
1044 s6->sin6_scope_id = ifindex;
1045 if (sendmsg(sd, &m, 0) < 0)
1051 err = sendmsg(sd, &m, 0);
1053 if (errno == EACCES && try_broadcast) {
1055 if (!set_broadcast(sd))
1062 log_msg("Sent message:\n");
1063 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1068 log_err_errno("failed to send msg to peer");
1072 static int socket_read_stream(int sd)
1077 len = read(sd, buf, sizeof(buf)-1);
1079 log_msg("client closed connection.\n");
1081 } else if (len < 0) {
1082 log_msg("failed to read message\n");
1087 log_msg("Incoming message:\n");
1088 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1090 if (!interactive && server_mode) {
1091 if (write(sd, buf, len) < 0) {
1092 log_err_errno("failed to send buf");
1095 log_msg("Sent message:\n");
1096 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1102 static int socket_read(int sd, struct sock_args *args)
1104 if (args->type == SOCK_STREAM)
1105 return socket_read_stream(sd);
1107 return socket_read_dgram(sd, args);
1110 static int stdin_to_socket(int sd, int type, void *addr, socklen_t alen)
1115 if (fgets(buf, sizeof(buf), stdin) == NULL)
1119 if (type == SOCK_STREAM) {
1120 if (write(sd, buf, len) < 0) {
1121 log_err_errno("failed to send buf");
1128 err = sendto(sd, buf, len, 0, addr, alen);
1130 if (errno == EACCES && try_broadcast) {
1132 if (!set_broadcast(sd))
1136 log_err_errno("failed to send msg to peer");
1140 log_msg("Sent message:\n");
1141 log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
1146 static void set_recv_attr(int sd, int version)
1148 if (version == AF_INET6) {
1149 set_recvpktinfo_v6(sd);
1157 static int msg_loop(int client, int sd, void *addr, socklen_t alen,
1158 struct sock_args *args)
1160 struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
1165 if (args->type != SOCK_STREAM)
1166 set_recv_attr(sd, args->version);
1169 msglen = strlen(msg);
1171 /* client sends first message */
1173 if (send_msg(sd, addr, alen, args))
1183 nfds = interactive ? MAX(fileno(stdin), sd) + 1 : sd + 1;
1188 FD_SET(fileno(stdin), &rfds);
1190 rc = select(nfds, &rfds, NULL, NULL, ptval);
1196 log_err_errno("select failed");
1198 } else if (rc == 0) {
1199 log_error("Timed out waiting for response\n");
1204 if (FD_ISSET(sd, &rfds)) {
1205 rc = socket_read(sd, args);
1216 if (FD_ISSET(fileno(stdin), &rfds)) {
1217 if (stdin_to_socket(sd, args->type, addr, alen) <= 0)
1230 log_msg("Going into quiet mode\n");
1234 if (send_msg(sd, addr, alen, args)) {
1244 static int msock_init(struct sock_args *args, int server)
1246 uint32_t if_addr = htonl(INADDR_ANY);
1247 struct sockaddr_in laddr = {
1248 .sin_family = AF_INET,
1249 .sin_port = htons(args->port),
1254 if (!server && args->has_local_ip)
1255 if_addr = args->local_addr.in.s_addr;
1257 sd = socket(PF_INET, SOCK_DGRAM, 0);
1259 log_err_errno("socket");
1263 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR,
1264 (char *)&one, sizeof(one)) < 0) {
1265 log_err_errno("Setting SO_REUSEADDR error");
1269 if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST,
1270 (char *)&one, sizeof(one)) < 0)
1271 log_err_errno("Setting SO_BROADCAST error");
1273 if (args->dev && bind_to_device(sd, args->dev) != 0)
1275 else if (args->use_setsockopt &&
1276 set_multicast_if(sd, args->ifindex))
1279 laddr.sin_addr.s_addr = if_addr;
1281 if (bind(sd, (struct sockaddr *) &laddr, sizeof(laddr)) < 0) {
1282 log_err_errno("bind failed");
1287 set_membership(sd, args->grp.s_addr,
1288 args->local_addr.in.s_addr, args->ifindex))
1297 static int msock_server(struct sock_args *args)
1299 return msock_init(args, 1);
1302 static int msock_client(struct sock_args *args)
1304 return msock_init(args, 0);
1307 static int bind_socket(int sd, struct sock_args *args)
1309 struct sockaddr_in serv_addr = {
1310 .sin_family = AF_INET,
1312 struct sockaddr_in6 serv6_addr = {
1313 .sin6_family = AF_INET6,
1318 if (!args->has_local_ip && args->type == SOCK_RAW)
1321 switch (args->version) {
1323 serv_addr.sin_port = htons(args->port);
1324 serv_addr.sin_addr = args->local_addr.in;
1326 alen = sizeof(serv_addr);
1330 serv6_addr.sin6_port = htons(args->port);
1331 serv6_addr.sin6_addr = args->local_addr.in6;
1333 alen = sizeof(serv6_addr);
1337 log_error("Invalid address family\n");
1341 if (bind(sd, addr, alen) < 0) {
1342 log_err_errno("error binding socket");
1349 static int lsock_init(struct sock_args *args)
1354 sd = socket(args->version, args->type, args->protocol);
1356 log_err_errno("Error opening socket");
1360 if (set_reuseaddr(sd) != 0)
1363 if (set_reuseport(sd) != 0)
1366 if (args->dev && bind_to_device(sd, args->dev) != 0)
1368 else if (args->use_setsockopt &&
1369 set_unicast_if(sd, args->ifindex, args->version))
1372 if (bind_socket(sd, args))
1375 if (args->bind_test_only)
1378 if (args->type == SOCK_STREAM && listen(sd, 1) < 0) {
1379 log_err_errno("listen failed");
1383 flags = fcntl(sd, F_GETFL);
1384 if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
1385 log_err_errno("Failed to set non-blocking option");
1389 if (fcntl(sd, F_SETFD, FD_CLOEXEC) < 0)
1390 log_err_errno("Failed to set close-on-exec flag");
1400 static void ipc_write(int fd, int message)
1402 /* Not in both_mode, so there's no process to signal */
1406 if (write(fd, &message, sizeof(message)) < 0)
1407 log_err_errno("Failed to send client status");
1410 static int do_server(struct sock_args *args, int ipc_fd)
1412 /* ipc_fd = -1 if no parent process to signal */
1413 struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
1414 unsigned char addr[sizeof(struct sockaddr_in6)] = {};
1415 socklen_t alen = sizeof(addr);
1421 if (args->serverns) {
1422 if (switch_ns(args->serverns)) {
1423 log_error("Could not set server netns to %s\n",
1427 log_msg("Switched server netns\n");
1430 args->dev = args->server_dev;
1431 args->expected_dev = args->expected_server_dev;
1432 if (resolve_devices(args) || validate_addresses(args))
1439 lsd = msock_server(args);
1441 lsd = lsock_init(args);
1446 if (args->bind_test_only) {
1448 ipc_write(ipc_fd, 1);
1452 if (args->type != SOCK_STREAM) {
1453 ipc_write(ipc_fd, 1);
1454 rc = msg_loop(0, lsd, (void *) addr, alen, args);
1459 if (args->password && tcp_md5_remote(lsd, args)) {
1464 ipc_write(ipc_fd, 1);
1466 log_msg("waiting for client connection.\n");
1470 rc = select(lsd+1, &rfds, NULL, NULL, ptval);
1480 log_err_errno("select failed");
1484 if (FD_ISSET(lsd, &rfds)) {
1486 csd = accept(lsd, (void *) addr, &alen);
1488 log_err_errno("accept failed");
1492 rc = show_sockstat(csd, args);
1496 rc = check_device(csd, args);
1501 rc = msg_loop(0, csd, (void *) addr, alen, args);
1512 ipc_write(ipc_fd, 0);
1516 static int wait_for_connect(int sd)
1518 struct timeval _tv = { .tv_sec = prog_timeout }, *tv = NULL;
1520 int val = 0, sz = sizeof(val);
1529 rc = select(FD_SETSIZE, NULL, &wfd, NULL, tv);
1531 log_error("connect timed out\n");
1533 } else if (rc < 0) {
1534 log_err_errno("select failed");
1538 if (getsockopt(sd, SOL_SOCKET, SO_ERROR, &val, (socklen_t *)&sz) < 0) {
1539 log_err_errno("getsockopt(SO_ERROR) failed");
1544 log_error("connect failed: %d: %s\n", val, strerror(val));
1551 static int connectsock(void *addr, socklen_t alen, struct sock_args *args)
1556 sd = socket(args->version, args->type, args->protocol);
1558 log_err_errno("Failed to create socket");
1562 flags = fcntl(sd, F_GETFL);
1563 if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
1564 log_err_errno("Failed to set non-blocking option");
1568 if (set_reuseport(sd) != 0)
1571 if (args->dev && bind_to_device(sd, args->dev) != 0)
1573 else if (args->use_setsockopt &&
1574 set_unicast_if(sd, args->ifindex, args->version))
1577 if (args->has_local_ip && bind_socket(sd, args))
1580 if (args->type != SOCK_STREAM)
1583 if (args->password && tcp_md5sig(sd, addr, alen, args))
1586 if (args->bind_test_only)
1589 if (connect(sd, addr, alen) < 0) {
1590 if (errno != EINPROGRESS) {
1591 log_err_errno("Failed to connect to remote host");
1595 rc = wait_for_connect(sd);
1607 static int do_client(struct sock_args *args)
1609 struct sockaddr_in sin = {
1610 .sin_family = AF_INET,
1612 struct sockaddr_in6 sin6 = {
1613 .sin6_family = AF_INET6,
1620 if (!args->has_remote_ip && !args->has_grp) {
1621 fprintf(stderr, "remote IP or multicast group not given\n");
1625 if (args->clientns) {
1626 if (switch_ns(args->clientns)) {
1627 log_error("Could not set client netns to %s\n",
1631 log_msg("Switched client netns\n");
1634 args->local_addr_str = args->client_local_addr_str;
1635 if (resolve_devices(args) || validate_addresses(args))
1638 if ((args->use_setsockopt || args->use_cmsg) && !args->ifindex) {
1639 fprintf(stderr, "Device binding not specified\n");
1642 if (args->use_setsockopt || args->use_cmsg)
1645 switch (args->version) {
1647 sin.sin_port = htons(args->port);
1649 sin.sin_addr = args->grp;
1651 sin.sin_addr = args->remote_addr.in;
1656 sin6.sin6_port = htons(args->port);
1657 sin6.sin6_addr = args->remote_addr.in6;
1658 sin6.sin6_scope_id = args->scope_id;
1660 alen = sizeof(sin6);
1664 args->password = args->client_pw;
1667 sd = msock_client(args);
1669 sd = connectsock(addr, alen, args);
1674 if (args->bind_test_only)
1677 if (args->type == SOCK_STREAM) {
1678 rc = show_sockstat(sd, args);
1683 rc = msg_loop(1, sd, addr, alen, args);
1691 static char *random_msg(int len)
1693 int i, n = 0, olen = len + 1;
1704 i = snprintf(m + n, olen - n, "%.26s",
1705 "abcdefghijklmnopqrstuvwxyz");
1709 i = snprintf(m + n, olen - n, "%.*s", len,
1710 "abcdefghijklmnopqrstuvwxyz");
1714 static int ipc_child(int fd, struct sock_args *args)
1716 char *outbuf, *errbuf;
1719 outbuf = malloc(4096);
1720 errbuf = malloc(4096);
1721 if (!outbuf || !errbuf) {
1722 fprintf(stderr, "server: Failed to allocate buffers for stdout and stderr\n");
1726 setbuffer(stdout, outbuf, 4096);
1727 setbuffer(stderr, errbuf, 4096);
1729 server_mode = 1; /* to tell log_msg in case we are in both_mode */
1731 /* when running in both mode, address validation applies
1732 * solely to client side
1734 args->has_expected_laddr = 0;
1735 args->has_expected_raddr = 0;
1737 rc = do_server(args, fd);
1746 static int ipc_parent(int cpid, int fd, struct sock_args *args)
1752 /* do the client-side function here in the parent process,
1753 * waiting to be told when to continue
1755 if (read(fd, &buf, sizeof(buf)) <= 0) {
1756 log_err_errno("Failed to read IPC status from status");
1760 log_error("Server failed; can not continue\n");
1763 log_msg("Server is ready\n");
1765 client_status = do_client(args);
1766 log_msg("parent is done!\n");
1768 if (kill(cpid, 0) == 0)
1769 kill(cpid, SIGKILL);
1772 return client_status;
1775 #define GETOPT_STR "sr:l:c:p:t:g:P:DRn:M:X:m:d:I:BN:O:SCi6L:0:1:2:3:Fbq"
1777 static void print_usage(char *prog)
1782 " -r addr remote address to connect to (client mode only)\n"
1783 " -p port port to connect to (client mode)/listen on (server mode)\n"
1785 " -s server mode (default: client mode)\n"
1786 " -t timeout seconds (default: none)\n"
1789 " -B do both client and server via fork and IPC\n"
1790 " -N ns set client to network namespace ns (requires root)\n"
1791 " -O ns set server to network namespace ns (requires root)\n"
1792 " -F Restart server loop\n"
1793 " -6 IPv6 (default is IPv4)\n"
1794 " -P proto protocol for socket: icmp, ospf (default: none)\n"
1795 " -D|R datagram (D) / raw (R) socket (default stream)\n"
1796 " -l addr local address to bind to in server mode\n"
1797 " -c addr local address to bind to in client mode\n"
1799 " -d dev bind socket to given device name\n"
1800 " -I dev bind socket to given device name - server mode\n"
1801 " -S use setsockopt (IP_UNICAST_IF or IP_MULTICAST_IF)\n"
1802 " to set device binding\n"
1803 " -C use cmsg and IP_PKTINFO to specify device binding\n"
1805 " -L len send random message of given length\n"
1806 " -n num number of times to send message\n"
1808 " -M password use MD5 sum protection\n"
1809 " -X password MD5 password for client mode\n"
1810 " -m prefix/len prefix and length to use for MD5 key\n"
1811 " -g grp multicast group (e.g., 239.1.1.1)\n"
1812 " -i interactive mode (default is echo and terminate)\n"
1814 " -0 addr Expected local address\n"
1815 " -1 addr Expected remote address\n"
1816 " -2 dev Expected device name (or index) to receive packet\n"
1817 " -3 dev Expected device name (or index) to receive packets - server mode\n"
1819 " -b Bind test only.\n"
1820 " -q Be quiet. Run test without printing anything.\n"
1821 , prog, DEFAULT_PORT);
1824 int main(int argc, char *argv[])
1826 struct sock_args args = {
1828 .type = SOCK_STREAM,
1829 .port = DEFAULT_PORT,
1831 struct protoent *pe;
1838 /* process inputs */
1839 extern char *optarg;
1843 * process input args
1846 while ((rc = getopt(argc, argv, GETOPT_STR)) != -1) {
1858 args.has_local_ip = 1;
1859 args.local_addr_str = optarg;
1862 args.has_remote_ip = 1;
1863 args.remote_addr_str = optarg;
1866 args.has_local_ip = 1;
1867 args.client_local_addr_str = optarg;
1870 if (str_to_uint(optarg, 1, 65535, &tmp) != 0) {
1871 fprintf(stderr, "Invalid port\n");
1874 args.port = (unsigned short) tmp;
1877 if (str_to_uint(optarg, 0, INT_MAX,
1878 &prog_timeout) != 0) {
1879 fprintf(stderr, "Invalid timeout\n");
1884 args.type = SOCK_DGRAM;
1887 args.type = SOCK_RAW;
1890 args.protocol = IPPROTO_RAW;
1893 pe = getprotobyname(optarg);
1895 args.protocol = pe->p_proto;
1897 if (str_to_uint(optarg, 0, 0xffff, &tmp) != 0) {
1898 fprintf(stderr, "Invalid protocol\n");
1901 args.protocol = tmp;
1905 iter = atoi(optarg);
1908 args.clientns = optarg;
1911 args.serverns = optarg;
1914 msg = random_msg(atoi(optarg));
1917 args.password = optarg;
1920 args.client_pw = optarg;
1923 args.md5_prefix_str = optarg;
1926 args.use_setsockopt = 1;
1935 args.server_dev = optarg;
1942 if (convert_addr(&args, optarg, ADDR_TYPE_MCAST) < 0)
1944 args.type = SOCK_DGRAM;
1947 args.version = AF_INET6;
1950 args.bind_test_only = 1;
1953 args.has_expected_laddr = 1;
1954 args.expected_laddr_str = optarg;
1957 args.has_expected_raddr = 1;
1958 args.expected_raddr_str = optarg;
1961 args.expected_dev = optarg;
1964 args.expected_server_dev = optarg;
1970 print_usage(argv[0]);
1975 if (args.password &&
1976 ((!args.has_remote_ip && !args.md5_prefix_str) ||
1977 args.type != SOCK_STREAM)) {
1978 log_error("MD5 passwords apply to TCP only and require a remote ip for the password\n");
1982 if (args.md5_prefix_str && !args.password) {
1983 log_error("Prefix range for MD5 protection specified without a password\n");
1988 fprintf(stderr, "Invalid number of messages to send\n");
1992 if (args.type == SOCK_STREAM && !args.protocol)
1993 args.protocol = IPPROTO_TCP;
1994 if (args.type == SOCK_DGRAM && !args.protocol)
1995 args.protocol = IPPROTO_UDP;
1997 if ((args.type == SOCK_STREAM || args.type == SOCK_DGRAM) &&
1999 fprintf(stderr, "Invalid port number\n");
2003 if ((both_mode || !server_mode) && !args.has_grp &&
2004 !args.has_remote_ip && !args.has_local_ip) {
2006 "Local (server mode) or remote IP (client IP) required\n");
2027 return ipc_parent(cpid, fd[0], &args);
2029 return ipc_child(fd[1], &args);
2034 rc = do_server(&args, -1);
2039 return do_client(&args);