138 lines
2.8 KiB
C
138 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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static void set_addr(struct sockaddr_storage *ss, char *ip, char *port, int *len)
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{
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if (ss->ss_family == AF_INET) {
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struct sockaddr_in *a = (struct sockaddr_in *)ss;
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a->sin_addr.s_addr = inet_addr(ip);
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a->sin_port = htons(atoi(port));
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*len = sizeof(*a);
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} else {
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struct sockaddr_in6 *a = (struct sockaddr_in6 *)ss;
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a->sin6_family = AF_INET6;
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inet_pton(AF_INET6, ip, &a->sin6_addr);
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a->sin6_port = htons(atoi(port));
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*len = sizeof(*a);
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}
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}
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static int do_client(int argc, char *argv[])
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{
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struct sockaddr_storage ss;
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char buf[] = "hello";
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int csk, ret, len;
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if (argc < 5) {
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printf("%s client -4|6 IP PORT [IP PORT]\n", argv[0]);
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return -1;
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}
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bzero((void *)&ss, sizeof(ss));
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ss.ss_family = !strcmp(argv[2], "-4") ? AF_INET : AF_INET6;
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csk = socket(ss.ss_family, SOCK_STREAM, IPPROTO_SCTP);
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if (csk < 0) {
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printf("failed to create socket\n");
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return -1;
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}
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if (argc >= 7) {
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set_addr(&ss, argv[5], argv[6], &len);
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ret = bind(csk, (struct sockaddr *)&ss, len);
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if (ret < 0) {
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printf("failed to bind to address\n");
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return -1;
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}
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}
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set_addr(&ss, argv[3], argv[4], &len);
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ret = connect(csk, (struct sockaddr *)&ss, len);
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if (ret < 0) {
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printf("failed to connect to peer\n");
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return -1;
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}
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ret = send(csk, buf, strlen(buf) + 1, 0);
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if (ret < 0) {
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printf("failed to send msg %d\n", ret);
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return -1;
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}
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close(csk);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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struct sockaddr_storage ss;
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int lsk, csk, ret, len;
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char buf[20];
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if (argc < 2 || (strcmp(argv[1], "server") && strcmp(argv[1], "client"))) {
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printf("%s server|client ...\n", argv[0]);
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return -1;
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}
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if (!strcmp(argv[1], "client"))
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return do_client(argc, argv);
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if (argc < 5) {
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printf("%s server -4|6 IP PORT [IFACE]\n", argv[0]);
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return -1;
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}
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ss.ss_family = !strcmp(argv[2], "-4") ? AF_INET : AF_INET6;
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lsk = socket(ss.ss_family, SOCK_STREAM, IPPROTO_SCTP);
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if (lsk < 0) {
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printf("failed to create lsk\n");
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return -1;
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}
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if (argc >= 6) {
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ret = setsockopt(lsk, SOL_SOCKET, SO_BINDTODEVICE,
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argv[5], strlen(argv[5]) + 1);
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if (ret < 0) {
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printf("failed to bind to device\n");
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return -1;
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}
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}
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set_addr(&ss, argv[3], argv[4], &len);
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ret = bind(lsk, (struct sockaddr *)&ss, len);
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if (ret < 0) {
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printf("failed to bind to address\n");
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return -1;
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}
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ret = listen(lsk, 5);
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if (ret < 0) {
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printf("failed to listen on port\n");
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return -1;
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}
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csk = accept(lsk, (struct sockaddr *)NULL, (socklen_t *)NULL);
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if (csk < 0) {
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printf("failed to accept new client\n");
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return -1;
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}
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ret = recv(csk, buf, sizeof(buf), 0);
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if (ret <= 0) {
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printf("failed to recv msg %d\n", ret);
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return -1;
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}
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close(csk);
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close(lsk);
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return 0;
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}
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