1 /* Copyright (c) 2017 Covalent IO, Inc. http://covalent.io
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of version 2 of the GNU General Public
5 * License as published by the Free Software Foundation.
7 * This program is distributed in the hope that it will be useful, but
8 * WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * General Public License for more details.
14 #include <sys/socket.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <netinet/in.h>
18 #include <arpa/inet.h>
22 #include <sys/ioctl.h>
28 #include <sys/types.h>
30 #include <linux/netlink.h>
31 #include <linux/socket.h>
32 #include <linux/sock_diag.h>
33 #include <linux/bpf.h>
34 #include <linux/if_link.h>
38 #include "../bpf/bpf_load.h"
39 #include "../bpf/bpf_util.h"
40 #include "../bpf/libbpf.h"
43 void running_handler(int a);
45 /* randomly selected ports for testing on lo */
49 static int sockmap_test_sockets(int rate, int dot)
51 int i, sc, err, max_fd, one = 1;
52 int s1, s2, c1, c2, p1, p2;
53 struct sockaddr_in addr;
54 struct timeval timeout;
56 int *fds[4] = {&s1, &s2, &c1, &c2};
59 s1 = s2 = p1 = p2 = c1 = c2 = 0;
62 for (i = 0; i < 4; i++) {
63 *fds[i] = socket(AF_INET, SOCK_STREAM, 0);
65 perror("socket s1 failed()");
72 for (i = 0; i < 2; i++) {
73 err = setsockopt(*fds[i], SOL_SOCKET, SO_REUSEADDR,
74 (char *)&one, sizeof(one));
76 perror("setsockopt failed()");
81 /* Non-blocking sockets */
82 for (i = 0; i < 4; i++) {
83 err = ioctl(*fds[i], FIONBIO, (char *)&one);
85 perror("ioctl s1 failed()");
90 /* Bind server sockets */
91 memset(&addr, 0, sizeof(struct sockaddr_in));
92 addr.sin_family = AF_INET;
93 addr.sin_addr.s_addr = inet_addr("127.0.0.1");
95 addr.sin_port = htons(S1_PORT);
96 err = bind(s1, (struct sockaddr *)&addr, sizeof(addr));
98 perror("bind s1 failed()\n");
102 addr.sin_port = htons(S2_PORT);
103 err = bind(s2, (struct sockaddr *)&addr, sizeof(addr));
105 perror("bind s2 failed()\n");
109 /* Listen server sockets */
110 addr.sin_port = htons(S1_PORT);
111 err = listen(s1, 32);
113 perror("listen s1 failed()\n");
117 addr.sin_port = htons(S2_PORT);
118 err = listen(s2, 32);
120 perror("listen s1 failed()\n");
124 /* Initiate Connect */
125 addr.sin_port = htons(S1_PORT);
126 err = connect(c1, (struct sockaddr *)&addr, sizeof(addr));
127 if (err < 0 && errno != EINPROGRESS) {
128 perror("connect c1 failed()\n");
132 addr.sin_port = htons(S2_PORT);
133 err = connect(c2, (struct sockaddr *)&addr, sizeof(addr));
134 if (err < 0 && errno != EINPROGRESS) {
135 perror("connect c2 failed()\n");
139 /* Accept Connecrtions */
140 p1 = accept(s1, NULL, NULL);
142 perror("accept s1 failed()\n");
146 p2 = accept(s2, NULL, NULL);
148 perror("accept s1 failed()\n");
156 printf("connected sockets: c1 <-> p1, c2 <-> p2\n");
157 printf("cgroups binding: c1(%i) <-> s1(%i) - - - c2(%i) <-> s2(%i)\n",
160 /* Ping/Pong data from client to server */
161 sc = send(c1, buf, sizeof(buf), 0);
163 perror("send failed()\n");
177 s = select(max_fd + 1, &w, NULL, NULL, &timeout);
182 fprintf(stderr, "unexpected timeout\n");
186 for (i = 0; i <= max_fd && s > 0; ++i) {
187 if (!FD_ISSET(i, &w))
192 rc = recv(i, buf, sizeof(buf), 0);
194 if (errno != EWOULDBLOCK) {
195 perror("recv failed()\n");
205 sc = send(i, buf, rc, 0);
207 perror("send failed()\n");
229 int main(int argc, char **argv)
231 int rate = 1, dot = 1;
236 cg_path = argv[argc - 1];
237 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
242 signal(SIGINT, running_handler);
244 if (load_bpf_file(filename)) {
245 fprintf(stderr, "load_bpf_file: (%s) %s\n",
246 filename, strerror(errno));
250 /* Cgroup configuration */
251 cg_fd = open(cg_path, O_DIRECTORY, O_RDONLY);
253 fprintf(stderr, "ERROR: (%i) open cg path failed: %s\n",
258 /* Attach programs to sockmap */
259 err = bpf_prog_attach(prog_fd[0], map_fd[0],
260 BPF_SK_SKB_STREAM_PARSER, 0);
262 fprintf(stderr, "ERROR: bpf_prog_attach (sockmap): %d (%s)\n",
263 err, strerror(errno));
267 err = bpf_prog_attach(prog_fd[1], map_fd[0],
268 BPF_SK_SKB_STREAM_VERDICT, 0);
270 fprintf(stderr, "ERROR: bpf_prog_attach (sockmap): %d (%s)\n",
271 err, strerror(errno));
275 /* Attach to cgroups */
276 err = bpf_prog_attach(prog_fd[2], cg_fd, BPF_CGROUP_SOCK_OPS, 0);
278 fprintf(stderr, "ERROR: bpf_prog_attach (groups): %d (%s)\n",
279 err, strerror(errno));
283 err = sockmap_test_sockets(rate, dot);
285 fprintf(stderr, "ERROR: test socket failed: %d\n", err);
291 void running_handler(int a)