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/param.h>
31 #include <sys/socket.h>
33 #include <netinet/in.h>
43 * Given an array of non-blocking listening sockets configured in a LB group
44 * for "addr", try connecting to "addr" in a loop and verify that connections
45 * are roughly balanced across the sockets.
48 lb_simple_accept_loop(int domain, const struct sockaddr *addr, int sds[],
49 size_t nsds, int nconns)
53 int csd, error, excnt, sd;
54 const struct linger lopt = { 1, 0 };
57 * We expect each listening socket to accept roughly nconns/nsds
58 * connections, but allow for some error.
60 excnt = nconns / nsds / 8;
61 acceptcnt = calloc(nsds, sizeof(*acceptcnt));
62 ATF_REQUIRE_MSG(acceptcnt != NULL, "calloc() failed: %s",
65 while (nconns-- > 0) {
66 sd = socket(domain, SOCK_STREAM, 0);
67 ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s",
70 error = connect(sd, addr, addr->sa_len);
71 ATF_REQUIRE_MSG(error == 0, "connect() failed: %s",
74 error = setsockopt(sd, SOL_SOCKET, SO_LINGER, &lopt, sizeof(lopt));
75 ATF_REQUIRE_MSG(error == 0, "Setting linger failed: %s",
79 * Poll the listening sockets.
82 for (i = 0; i < nsds; i++) {
83 csd = accept(sds[i], NULL, NULL);
85 ATF_REQUIRE_MSG(errno == EWOULDBLOCK ||
87 "accept() failed: %s",
93 ATF_REQUIRE_MSG(error == 0,
94 "close() failed: %s", strerror(errno));
102 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
106 for (i = 0; i < nsds; i++)
107 ATF_REQUIRE_MSG(acceptcnt[i] > excnt, "uneven balancing");
111 lb_listen_socket(int domain, int flags)
116 sd = socket(domain, SOCK_STREAM | flags, 0);
117 ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s", strerror(errno));
120 error = setsockopt(sd, SOL_SOCKET, SO_REUSEPORT_LB, &one, sizeof(one));
121 ATF_REQUIRE_MSG(error == 0, "setsockopt(SO_REUSEPORT_LB) failed: %s",
127 ATF_TC_WITHOUT_HEAD(basic_ipv4);
128 ATF_TC_BODY(basic_ipv4, tc)
130 struct sockaddr_in addr;
133 const int nconns = 16384;
137 sds[0] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
139 memset(&addr, 0, sizeof(addr));
140 addr.sin_len = sizeof(addr);
141 addr.sin_family = AF_INET;
142 addr.sin_port = htons(0);
143 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
144 error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
145 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
146 error = listen(sds[0], 1);
147 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
150 error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
151 ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
153 ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
154 port = addr.sin_port;
156 memset(&addr, 0, sizeof(addr));
157 addr.sin_len = sizeof(addr);
158 addr.sin_family = AF_INET;
159 addr.sin_port = port;
160 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
161 for (i = 1; i < nitems(sds); i++) {
162 sds[i] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
164 error = bind(sds[i], (const struct sockaddr *)&addr,
166 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
168 error = listen(sds[i], 1);
169 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
173 lb_simple_accept_loop(PF_INET, (struct sockaddr *)&addr, sds,
174 nitems(sds), nconns);
175 for (i = 0; i < nitems(sds); i++) {
176 error = close(sds[i]);
177 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
182 ATF_TC_WITHOUT_HEAD(basic_ipv6);
183 ATF_TC_BODY(basic_ipv6, tc)
185 const struct in6_addr loopback6 = IN6ADDR_LOOPBACK_INIT;
186 struct sockaddr_in6 addr;
189 const int nconns = 16384;
193 sds[0] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
195 memset(&addr, 0, sizeof(addr));
196 addr.sin6_len = sizeof(addr);
197 addr.sin6_family = AF_INET6;
198 addr.sin6_port = htons(0);
199 addr.sin6_addr = loopback6;
200 error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
201 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
202 error = listen(sds[0], 1);
203 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
206 error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
207 ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
209 ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
210 port = addr.sin6_port;
212 memset(&addr, 0, sizeof(addr));
213 addr.sin6_len = sizeof(addr);
214 addr.sin6_family = AF_INET6;
215 addr.sin6_port = port;
216 addr.sin6_addr = loopback6;
217 for (i = 1; i < nitems(sds); i++) {
218 sds[i] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
220 error = bind(sds[i], (const struct sockaddr *)&addr,
222 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
224 error = listen(sds[i], 1);
225 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
229 lb_simple_accept_loop(PF_INET6, (struct sockaddr *)&addr, sds,
230 nitems(sds), nconns);
231 for (i = 0; i < nitems(sds); i++) {
232 error = close(sds[i]);
233 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
240 ATF_TP_ADD_TC(tp, basic_ipv4);
241 ATF_TP_ADD_TC(tp, basic_ipv6);
243 return (atf_no_error());