243 lines
6.9 KiB
C
243 lines
6.9 KiB
C
/*-
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* Copyright (c) 2018 The FreeBSD Foundation
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*
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* This software was developed by Mark Johnston under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <atf-c.h>
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/*
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* Given an array of non-blocking listening sockets configured in a LB group
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* for "addr", try connecting to "addr" in a loop and verify that connections
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* are roughly balanced across the sockets.
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*/
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static void
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lb_simple_accept_loop(int domain, const struct sockaddr *addr, int sds[],
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size_t nsds, int nconns)
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{
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size_t i;
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int *acceptcnt;
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int csd, error, excnt, sd;
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/*
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* We expect each listening socket to accept roughly nconns/nsds
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* connections, but allow for some error.
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*/
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excnt = nconns / nsds / 8;
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acceptcnt = calloc(nsds, sizeof(*acceptcnt));
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ATF_REQUIRE_MSG(acceptcnt != NULL, "calloc() failed: %s",
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strerror(errno));
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while (nconns-- > 0) {
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sd = socket(domain, SOCK_STREAM, 0);
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ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s",
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strerror(errno));
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error = connect(sd, addr, addr->sa_len);
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ATF_REQUIRE_MSG(error == 0, "connect() failed: %s",
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strerror(errno));
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/*
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* Poll the listening sockets.
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*/
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do {
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for (i = 0; i < nsds; i++) {
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csd = accept(sds[i], NULL, NULL);
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if (csd < 0) {
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ATF_REQUIRE_MSG(errno == EWOULDBLOCK ||
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errno == EAGAIN,
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"accept() failed: %s",
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strerror(errno));
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continue;
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}
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error = close(csd);
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ATF_REQUIRE_MSG(error == 0,
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"close() failed: %s", strerror(errno));
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acceptcnt[i]++;
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break;
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}
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} while (i == nsds);
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error = close(sd);
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ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
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strerror(errno));
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}
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for (i = 0; i < nsds; i++)
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ATF_REQUIRE_MSG(acceptcnt[i] > excnt, "uneven balancing");
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}
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static int
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lb_listen_socket(int domain, int flags)
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{
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size_t one;
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int error, sd;
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sd = socket(domain, SOCK_STREAM | flags, 0);
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ATF_REQUIRE_MSG(sd >= 0, "socket() failed: %s", strerror(errno));
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one = 1;
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error = setsockopt(sd, SOL_SOCKET, SO_REUSEPORT_LB, &one, sizeof(one));
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ATF_REQUIRE_MSG(error == 0, "setsockopt(SO_REUSEPORT_LB) failed: %s",
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strerror(errno));
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return (sd);
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}
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ATF_TC_WITHOUT_HEAD(basic_ipv4);
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ATF_TC_BODY(basic_ipv4, tc)
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{
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struct sockaddr_in addr;
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socklen_t slen;
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size_t i;
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const int nconns = 16384;
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int error, sds[16];
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uint16_t port;
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sds[0] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
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memset(&addr, 0, sizeof(addr));
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addr.sin_len = sizeof(addr);
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addr.sin_family = AF_INET;
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addr.sin_port = htons(0);
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addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
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ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
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error = listen(sds[0], 1);
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ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
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slen = sizeof(addr);
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error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
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ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
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strerror(errno));
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ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
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port = addr.sin_port;
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memset(&addr, 0, sizeof(addr));
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addr.sin_len = sizeof(addr);
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addr.sin_family = AF_INET;
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addr.sin_port = port;
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addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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for (i = 1; i < nitems(sds); i++) {
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sds[i] = lb_listen_socket(PF_INET, SOCK_NONBLOCK);
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error = bind(sds[i], (const struct sockaddr *)&addr,
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sizeof(addr));
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ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
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strerror(errno));
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error = listen(sds[i], 1);
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ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
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strerror(errno));
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}
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lb_simple_accept_loop(PF_INET, (struct sockaddr *)&addr, sds,
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nitems(sds), nconns);
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for (i = 0; i < nitems(sds); i++) {
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error = close(sds[i]);
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ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
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strerror(errno));
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}
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}
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ATF_TC_WITHOUT_HEAD(basic_ipv6);
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ATF_TC_BODY(basic_ipv6, tc)
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{
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const struct in6_addr loopback6 = IN6ADDR_LOOPBACK_INIT;
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struct sockaddr_in6 addr;
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socklen_t slen;
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size_t i;
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const int nconns = 16384;
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int error, sds[16];
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uint16_t port;
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sds[0] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
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memset(&addr, 0, sizeof(addr));
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addr.sin6_len = sizeof(addr);
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addr.sin6_family = AF_INET6;
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addr.sin6_port = htons(0);
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addr.sin6_addr = loopback6;
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error = bind(sds[0], (const struct sockaddr *)&addr, sizeof(addr));
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ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
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error = listen(sds[0], 1);
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ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
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slen = sizeof(addr);
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error = getsockname(sds[0], (struct sockaddr *)&addr, &slen);
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ATF_REQUIRE_MSG(error == 0, "getsockname() failed: %s",
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strerror(errno));
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ATF_REQUIRE_MSG(slen == sizeof(addr), "sockaddr size changed");
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port = addr.sin6_port;
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memset(&addr, 0, sizeof(addr));
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addr.sin6_len = sizeof(addr);
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addr.sin6_family = AF_INET6;
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addr.sin6_port = port;
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addr.sin6_addr = loopback6;
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for (i = 1; i < nitems(sds); i++) {
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sds[i] = lb_listen_socket(PF_INET6, SOCK_NONBLOCK);
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error = bind(sds[i], (const struct sockaddr *)&addr,
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sizeof(addr));
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ATF_REQUIRE_MSG(error == 0, "bind() failed: %s",
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strerror(errno));
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error = listen(sds[i], 1);
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ATF_REQUIRE_MSG(error == 0, "listen() failed: %s",
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strerror(errno));
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}
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lb_simple_accept_loop(PF_INET6, (struct sockaddr *)&addr, sds,
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nitems(sds), nconns);
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for (i = 0; i < nitems(sds); i++) {
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error = close(sds[i]);
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ATF_REQUIRE_MSG(error == 0, "close() failed: %s",
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strerror(errno));
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}
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, basic_ipv4);
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ATF_TP_ADD_TC(tp, basic_ipv6);
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return (atf_no_error());
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}
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