62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <string.h>
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int client_tcp() {
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char* hostname = "localhost";
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char* port = "9004";
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struct addrinfo hints = {0};
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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struct addrinfo* res;
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int err_ret = getaddrinfo(hostname, port, &hints, &res);
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if (err_ret != 0) {
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fprintf(stderr, "getaddrinfo got error code: %d\n", err_ret);
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return -1;
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}
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int sfd = -1;
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for (struct addrinfo* i = res; i != NULL; i = i->ai_next) {
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sfd = socket(i->ai_family, i->ai_socktype, i->ai_protocol);
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if (sfd == -1) {
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perror("socket");
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continue;
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}
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int connect_err = connect(sfd, i->ai_addr, i->ai_addrlen);
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if (connect_err == -1) {
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perror("connect client tcp");
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continue;
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}
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break;
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}
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freeaddrinfo(res);
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if (sfd == -1) {
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fprintf(stderr, "couldn't create client socket\n");
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return -1;
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}
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return sfd;
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}
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int main(void) {
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int sfd_client = client_tcp();
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char* my_string = "message from tcp client";
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write(sfd_client, my_string, strlen(my_string) + 1);
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char buf[1000];
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read(sfd_client, buf, 1000);
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printf("Client recieved from server: `%s`\n", buf);
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close(sfd_client);
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}
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