54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <spawn.h>
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#include <unistd.h>
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int main(int argc, const char *argv[]) {
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const char* message = "Hello world!";
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int ret;
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if (argc != 2) {
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printf("usage: ./client <ipaddress>\n");
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return 0;
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}
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int sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd < 0) {
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printf("create socket error: %s(errno: %d)\n", strerror(errno), errno);
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return -1;
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}
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struct sockaddr_in servaddr;
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memset(&servaddr, 0, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_port = htons(6666);
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ret = inet_pton(AF_INET, argv[1], &servaddr.sin_addr);
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if (ret <= 0) {
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printf("inet_pton error for %s\n", argv[1]);
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return -1;
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}
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ret = connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
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if (ret < 0) {
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printf("connect error: %s(errno: %d)\n", strerror(errno), errno);
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return -1;
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}
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printf("send msg to server: %s\n", message);
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ret = send(sockfd, message, strlen(message), 0);
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if (ret < 0) {
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printf("send msg error: %s(errno: %d)\n", strerror(errno), errno);
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return -1;
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}
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close(sockfd);
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return 0;
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}
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