1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/errqueue.h>
10 #include <linux/if_packet.h>
11 #include <linux/socket.h>
12 #include <linux/sockios.h>
13 #include <net/ethernet.h>
15 #include <netinet/ip.h>
16 #include <netinet/ip6.h>
17 #include <netinet/tcp.h>
18 #include <netinet/udp.h>
26 #include <sys/ioctl.h>
27 #include <sys/socket.h>
30 #include <sys/types.h>
38 static int cfg_port = 8000;
40 static bool cfg_verify;
41 static bool cfg_read_all;
42 static bool cfg_gro_segment;
43 static int cfg_family = PF_INET6;
44 static int cfg_alen = sizeof(struct sockaddr_in6);
45 static int cfg_expected_pkt_nr;
46 static int cfg_expected_pkt_len;
47 static int cfg_expected_gso_size;
48 static int cfg_connect_timeout_ms;
49 static int cfg_rcv_timeout_ms;
50 static struct sockaddr_storage cfg_bind_addr;
52 static bool interrupted;
53 static unsigned long packets, bytes;
55 static void sigint_handler(int signum)
61 static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
63 struct sockaddr_in6 *addr6 = (void *) sockaddr;
64 struct sockaddr_in *addr4 = (void *) sockaddr;
68 addr4->sin_family = AF_INET;
69 addr4->sin_port = htons(cfg_port);
70 if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
71 error(1, 0, "ipv4 parse error: %s", str_addr);
74 addr6->sin6_family = AF_INET6;
75 addr6->sin6_port = htons(cfg_port);
76 if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
77 error(1, 0, "ipv6 parse error: %s", str_addr);
80 error(1, 0, "illegal domain");
84 static unsigned long gettimeofday_ms(void)
88 gettimeofday(&tv, NULL);
89 return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
92 static void do_poll(int fd, int timeout_ms)
102 ret = poll(&pfd, 1, 10);
106 error(1, errno, "poll");
112 if (timeout_ms <= 0) {
117 /* no events and more time to wait, do poll again */
120 if (pfd.revents != POLLIN)
121 error(1, errno, "poll: 0x%x expected 0x%x\n",
122 pfd.revents, POLLIN);
126 static int do_socket(bool do_tcp)
130 fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
132 error(1, errno, "socket");
135 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)))
136 error(1, errno, "setsockopt rcvbuf");
138 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val)))
139 error(1, errno, "setsockopt reuseport");
141 if (bind(fd, (void *)&cfg_bind_addr, cfg_alen))
142 error(1, errno, "bind");
147 if (listen(accept_fd, 1))
148 error(1, errno, "listen");
150 do_poll(accept_fd, cfg_connect_timeout_ms);
154 fd = accept(accept_fd, NULL, NULL);
156 error(1, errno, "accept");
157 if (close(accept_fd))
158 error(1, errno, "close accept fd");
164 /* Flush all outstanding bytes for the tcp receive queue */
165 static void do_flush_tcp(int fd)
170 /* MSG_TRUNC flushes up to len bytes */
171 ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT);
172 if (ret == -1 && errno == EAGAIN)
175 error(1, errno, "flush");
177 /* client detached */
187 static char sanitized_char(char val)
189 return (val >= 'a' && val <= 'z') ? val : '.';
192 static void do_verify_udp(const char *data, int len)
197 /* verify contents */
198 if (cur < 'a' || cur > 'z')
199 error(1, 0, "data initial byte out of range");
201 for (i = 1; i < len; i++) {
208 error(1, 0, "data[%d]: len %d, %c(%hhu) != %c(%hhu)\n",
210 sanitized_char(data[i]), data[i],
211 sanitized_char(cur), cur);
215 static int recv_msg(int fd, char *buf, int len, int *gso_size)
217 char control[CMSG_SPACE(sizeof(int))] = {0};
218 struct msghdr msg = {0};
219 struct iovec iov = {0};
220 struct cmsghdr *cmsg;
229 msg.msg_control = control;
230 msg.msg_controllen = sizeof(control);
233 ret = recvmsg(fd, &msg, MSG_TRUNC | MSG_DONTWAIT);
235 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
236 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
237 if (cmsg->cmsg_level == SOL_UDP
238 && cmsg->cmsg_type == UDP_GRO) {
239 *gso_size = *(int *)CMSG_DATA(cmsg);
247 /* Flush all outstanding datagrams. Verify first few bytes of each. */
248 static void do_flush_udp(int fd)
250 static char rbuf[ETH_MAX_MTU];
251 int ret, len, gso_size = 0, budget = 256;
253 len = cfg_read_all ? sizeof(rbuf) : 0;
255 /* MSG_TRUNC will make return value full datagram length */
256 if (!cfg_expected_gso_size)
257 ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT);
259 ret = recv_msg(fd, rbuf, len, &gso_size);
260 if (ret == -1 && errno == EAGAIN)
263 error(1, errno, "recv");
264 if (cfg_expected_pkt_len && ret != cfg_expected_pkt_len)
265 error(1, 0, "recv: bad packet len, got %d,"
266 " expected %d\n", ret, cfg_expected_pkt_len);
267 if (len && cfg_verify) {
269 error(1, errno, "recv: 0 byte datagram\n");
271 do_verify_udp(rbuf, ret);
273 if (cfg_expected_gso_size && cfg_expected_gso_size != gso_size)
274 error(1, 0, "recv: bad gso size, got %d, expected %d "
275 "(-1 == no gso cmsg))\n", gso_size,
276 cfg_expected_gso_size);
280 if (cfg_expected_pkt_nr && packets >= cfg_expected_pkt_nr)
285 static void usage(const char *filepath)
287 error(1, 0, "Usage: %s [-C connect_timeout] [-Grtv] [-b addr] [-p port]"
288 " [-l pktlen] [-n packetnr] [-R rcv_timeout] [-S gsosize]",
292 static void parse_opts(int argc, char **argv)
294 const char *bind_addr = NULL;
297 while ((c = getopt(argc, argv, "4b:C:Gl:n:p:rR:S:tv")) != -1) {
300 cfg_family = PF_INET;
301 cfg_alen = sizeof(struct sockaddr_in);
307 cfg_connect_timeout_ms = strtoul(optarg, NULL, 0);
310 cfg_gro_segment = true;
313 cfg_expected_pkt_len = strtoul(optarg, NULL, 0);
316 cfg_expected_pkt_nr = strtoul(optarg, NULL, 0);
319 cfg_port = strtoul(optarg, NULL, 0);
325 cfg_rcv_timeout_ms = strtoul(optarg, NULL, 0);
328 cfg_expected_gso_size = strtol(optarg, NULL, 0);
343 bind_addr = cfg_family == PF_INET6 ? "::" : "0.0.0.0";
345 setup_sockaddr(cfg_family, bind_addr, &cfg_bind_addr);
350 if (cfg_tcp && cfg_verify)
351 error(1, 0, "TODO: implement verify mode for tcp");
354 static void do_recv(void)
356 int timeout_ms = cfg_tcp ? cfg_rcv_timeout_ms : cfg_connect_timeout_ms;
357 unsigned long tnow, treport;
360 fd = do_socket(cfg_tcp);
362 if (cfg_gro_segment && !cfg_tcp) {
364 if (setsockopt(fd, IPPROTO_UDP, UDP_GRO, &val, sizeof(val)))
365 error(1, errno, "setsockopt UDP_GRO");
368 treport = gettimeofday_ms() + 1000;
370 do_poll(fd, timeout_ms);
377 tnow = gettimeofday_ms();
378 if (!cfg_expected_pkt_nr && tnow > treport) {
381 "%s rx: %6lu MB/s %8lu calls/s\n",
382 cfg_tcp ? "tcp" : "udp",
383 bytes >> 20, packets);
385 treport = tnow + 1000;
388 timeout_ms = cfg_rcv_timeout_ms;
390 } while (!interrupted);
392 if (cfg_expected_pkt_nr && (packets != cfg_expected_pkt_nr))
393 error(1, 0, "wrong packet number! got %ld, expected %d\n",
394 packets, cfg_expected_pkt_nr);
397 error(1, errno, "close");
400 int main(int argc, char **argv)
402 parse_opts(argc, argv);
404 signal(SIGINT, sigint_handler);