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 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/socket.h>
36 #include <netinet/in.h>
46 * Given an array of non-blocking listening sockets configured in a LB group
47 * for "addr", try connecting to "addr" in a loop and verify that connections
48 * are roughly balanced across the sockets.
51 lb_simple_accept_loop(int domain, const struct sockaddr *addr, int sds[],
52 size_t nsds, int nconns)
56 int csd, error, excnt, sd;
59 * We expect each listening socket to accept roughly nconns/nsds
60 * connections, but allow for some error.
62 excnt = nconns / nsds / 8;
63 acceptcnt = calloc(nsds, sizeof(*acceptcnt));
64 ATF_REQUIRE_MSG(acceptcnt != NULL, "calloc() failed: %s",
67 while (nconns-- > 0) {
68 sd = socket(domain, SOCK_STREAM, 0);
69 ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s",
72 error = connect(sd, addr, addr->sa_len);
73 ATF_REQUIRE_MSG(error == 0, "connect() failed: %s",
77 * Poll the listening sockets.
80 for (i = 0; i < nsds; i++) {
81 csd = accept(sds[i], NULL, NULL);
83 ATF_REQUIRE_MSG(errno == EWOULDBLOCK ||
85 "accept() failed: %s",
91 ATF_REQUIRE_MSG(error == 0,
92 "close() failed: %s", strerror(errno));
100 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
104 for (i = 0; i < nsds; i++)
105 ATF_REQUIRE_MSG(acceptcnt[i] > excnt, "uneven balancing");
109 lb_listen_socket(int domain, int flags)
114 sd = socket(domain, SOCK_STREAM | flags, 0);
115 ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s", strerror(errno));
118 error = setsockopt(sd, SOL_SOCKET, SO_REUSEPORT_LB, &one, sizeof(one));
119 ATF_REQUIRE_MSG(error == 0, "setsockopt(SO_REUSEPORT_LB) failed: %s",
125 ATF_TC_WITHOUT_HEAD(basic_ipv4);
126 ATF_TC_BODY(basic_ipv4, tc)
128 struct sockaddr_in addr;
131 const int nconns = 16384;
135 sds[0] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
137 memset(&addr, 0, sizeof(addr));
138 addr.sin_len = sizeof(addr);
139 addr.sin_family = AF_INET;
140 addr.sin_port = htons(0);
141 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
142 error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
143 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
144 error = listen(sds[0], 1);
145 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
148 error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
149 ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
151 ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
152 port = addr.sin_port;
154 memset(&addr, 0, sizeof(addr));
155 addr.sin_len = sizeof(addr);
156 addr.sin_family = AF_INET;
157 addr.sin_port = port;
158 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
159 for (i = 1; i < nitems(sds); i++) {
160 sds[i] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
162 error = bind(sds[i], (const struct sockaddr *)&addr,
164 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
166 error = listen(sds[i], 1);
167 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
171 lb_simple_accept_loop(PF_INET, (struct sockaddr *)&addr, sds,
172 nitems(sds), nconns);
173 for (i = 0; i < nitems(sds); i++) {
174 error = close(sds[i]);
175 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
180 ATF_TC_WITHOUT_HEAD(basic_ipv6);
181 ATF_TC_BODY(basic_ipv6, tc)
183 const struct in6_addr loopback6 = IN6ADDR_LOOPBACK_INIT;
184 struct sockaddr_in6 addr;
187 const int nconns = 16384;
191 sds[0] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
193 memset(&addr, 0, sizeof(addr));
194 addr.sin6_len = sizeof(addr);
195 addr.sin6_family = AF_INET6;
196 addr.sin6_port = htons(0);
197 addr.sin6_addr = loopback6;
198 error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
199 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
200 error = listen(sds[0], 1);
201 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
204 error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
205 ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
207 ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
208 port = addr.sin6_port;
210 memset(&addr, 0, sizeof(addr));
211 addr.sin6_len = sizeof(addr);
212 addr.sin6_family = AF_INET6;
213 addr.sin6_port = port;
214 addr.sin6_addr = loopback6;
215 for (i = 1; i < nitems(sds); i++) {
216 sds[i] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
218 error = bind(sds[i], (const struct sockaddr *)&addr,
220 ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
222 error = listen(sds[i], 1);
223 ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
227 lb_simple_accept_loop(PF_INET6, (struct sockaddr *)&addr, sds,
228 nitems(sds), nconns);
229 for (i = 0; i < nitems(sds); i++) {
230 error = close(sds[i]);
231 ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
238 ATF_TP_ADD_TC(tp, basic_ipv4);
239 ATF_TP_ADD_TC(tp, basic_ipv6);
241 return (atf_no_error());