2 * Copyright (c) 2018 The FreeBSD Foundation
4 * This software was developed by Mark Johnston under sponsorship from
5 * the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 #include <sys/param.h>
32 #include <sys/socket.h>
34 #include <netinet/in.h>
44 * Given an array of non-blocking listening sockets configured in a LB group
45 * for "addr", try connecting to "addr" in a loop and verify that connections
46 * are roughly balanced across the sockets.
49 lb_simple_accept_loop(int domain, const struct sockaddr *addr, int sds[],
50 size_t nsds, int nconns)
54 int csd, error, excnt, sd;
55 const struct linger lopt = { 1, 0 };
58 * We expect each listening socket to accept roughly nconns/nsds
59 * connections, but allow for some error.
61 excnt = nconns / nsds / 8;
62 acceptcnt = calloc(nsds, sizeof(*acceptcnt));
63 ATF_REQUIRE_MSG(acceptcnt != NULL, "calloc() failed: %s",
66 while (nconns-- > 0) {
67 sd = socket(domain, SOCK_STREAM, 0);
68 ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s",
71 error = connect(sd, addr, addr->sa_len);
72 ATF_REQUIRE_MSG(error == 0, "connect() failed: %s",
75 error = setsockopt(sd, SOL_SOCKET, SO_LINGER, &lopt, sizeof(lopt));
76 ATF_REQUIRE_MSG(error == 0, "Setting linger failed: %s",
80 * Poll the listening sockets.
83 for (i = 0; i < nsds; i++) {
84 csd = accept(sds[i], NULL, NULL);
86 ATF_REQUIRE_MSG(errno == EWOULDBLOCK ||
88 "accept() failed: %s",
94 ATF_REQUIRE_MSG(error == 0,
95 "close() failed: %s", strerror(errno));
103 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
107 for (i = 0; i < nsds; i++)
108 ATF_REQUIRE_MSG(acceptcnt[i] > excnt, "uneven balancing");
112 lb_listen_socket(int domain, int flags)
117 sd = socket(domain, SOCK_STREAM | flags, 0);
118 ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s", strerror(errno));
121 error = setsockopt(sd, SOL_SOCKET, SO_REUSEPORT_LB, &one, sizeof(one));
122 ATF_REQUIRE_MSG(error == 0, "setsockopt(SO_REUSEPORT_LB) failed: %s",
128 ATF_TC_WITHOUT_HEAD(basic_ipv4);
129 ATF_TC_BODY(basic_ipv4, tc)
131 struct sockaddr_in addr;
134 const int nconns = 16384;
138 sds[0] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
140 memset(&addr, 0, sizeof(addr));
141 addr.sin_len = sizeof(addr);
142 addr.sin_family = AF_INET;
143 addr.sin_port = htons(0);
144 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
145 error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
146 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
147 error = listen(sds[0], 1);
148 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
151 error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
152 ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
154 ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
155 port = addr.sin_port;
157 memset(&addr, 0, sizeof(addr));
158 addr.sin_len = sizeof(addr);
159 addr.sin_family = AF_INET;
160 addr.sin_port = port;
161 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
162 for (i = 1; i < nitems(sds); i++) {
163 sds[i] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
165 error = bind(sds[i], (const struct sockaddr *)&addr,
167 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
169 error = listen(sds[i], 1);
170 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
174 lb_simple_accept_loop(PF_INET, (struct sockaddr *)&addr, sds,
175 nitems(sds), nconns);
176 for (i = 0; i < nitems(sds); i++) {
177 error = close(sds[i]);
178 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
183 ATF_TC_WITHOUT_HEAD(basic_ipv6);
184 ATF_TC_BODY(basic_ipv6, tc)
186 const struct in6_addr loopback6 = IN6ADDR_LOOPBACK_INIT;
187 struct sockaddr_in6 addr;
190 const int nconns = 16384;
194 sds[0] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
196 memset(&addr, 0, sizeof(addr));
197 addr.sin6_len = sizeof(addr);
198 addr.sin6_family = AF_INET6;
199 addr.sin6_port = htons(0);
200 addr.sin6_addr = loopback6;
201 error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
202 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
203 error = listen(sds[0], 1);
204 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
207 error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
208 ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
210 ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
211 port = addr.sin6_port;
213 memset(&addr, 0, sizeof(addr));
214 addr.sin6_len = sizeof(addr);
215 addr.sin6_family = AF_INET6;
216 addr.sin6_port = port;
217 addr.sin6_addr = loopback6;
218 for (i = 1; i < nitems(sds); i++) {
219 sds[i] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
221 error = bind(sds[i], (const struct sockaddr *)&addr,
223 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
225 error = listen(sds[i], 1);
226 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
230 lb_simple_accept_loop(PF_INET6, (struct sockaddr *)&addr, sds,
231 nitems(sds), nconns);
232 for (i = 0; i < nitems(sds); i++) {
233 error = close(sds[i]);
234 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
241 ATF_TP_ADD_TC(tp, basic_ipv4);
242 ATF_TP_ADD_TC(tp, basic_ipv6);
244 return (atf_no_error());