51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#include <arpa/inet.h>
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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 <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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void run_client(int port, char *msg) {
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int sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd < 0) {
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fprintf(stderr, "socket: ");
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exit(EXIT_FAILURE);
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}
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struct sockaddr_in server_addr;
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memset(&server_addr, 0, sizeof(server_addr));
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = INADDR_ANY;
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server_addr.sin_port = htons(port);
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if (connect(sockfd, (const struct sockaddr *)&server_addr, sizeof(server_addr))) {
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fprintf(stderr, "connect: ");
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exit(EXIT_FAILURE);
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}
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int rv = sendto(sockfd, msg, strlen(msg), 0, (const struct sockaddr *)&server_addr, sizeof(server_addr));
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if (rv < 0) {
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fprintf(stderr, "sendto: ");
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exit(EXIT_FAILURE);
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}
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char buffer[100];
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memset(&buffer, 0, sizeof(buffer));
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socklen_t server_addr_len = sizeof(server_addr);
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rv = recvfrom(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr *)&server_addr, &server_addr_len);
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if (rv < 0) {
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fprintf(stderr, "recvfrom: ");
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exit(EXIT_FAILURE);
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}
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printf("Server reply: %s\n", buffer);
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close(sockfd);
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}
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int main(int arc, char *argv[]) {
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run_client(2137, argv[1]);
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return 0;
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} |