client.c

#include "socket.h"

int main(int argc, char *argv[]) {
	printf("starting client...\n");
	start_client();
	return 0;
}

int start_client(void) {
	struct sockaddr_in addr;
	struct sockaddr_in server_addr;

	printf("opening socket...\n");
	int sockfd = socket(AF_INET, SOCK_DGRAM, 0);

	/* error handling */
	if (sockfd < 0) {
		perror("[client] socket error\n");
		return -1;
	}
	printf("done!\n");

	printf("generating local client socket...\n");
	/* zero out all fields in addr */
	memset(&addr, 0, sizeof(addr));
	addr.sin_family = AF_INET;
	addr.sin_port = htons(9998);
	inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
	printf("done!\n");

	printf("binding address to socket...\n");
	int bind_val = bind(sockfd, (struct sockaddr *)&addr, sizeof(addr));
	if (bind_val < 0) {
		perror("[client] bind error.\n");
		return -1;
	}
	printf("done!\n");

	
	printf("generating local server address...\n");
	memset(&server_addr, 0, sizeof(server_addr));
	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons(9999);
	inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr);
	printf("done!\n");

	/* send data */
	char buffer[BUF_SIZE] = "hello there!\n";

	int val = send_text(sockfd, server_addr, buffer);
	if (val < 0) {
		perror("[client] cant send text.\n");
		return -1;
	}
	return sockfd;
}