udp client-DGRAM

1 files changed, 91 insertions, 0 deletions

diff --git a/client-DGRAM.c b/client-DGRAM.c
new file mode 100644
index 0000000..f447d37
--- /dev/null
+++ b/client-DGRAM.c
@@ -0,0 +1,91 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <signal.h>
+
+#define __FAIL EXIT_FAILURE
+#define BACKLOG 2
+#define __PORT "62000"
+#define BUF_SZ_2 2048
+
+int sockfd = -1;
+size_t bytes_sent = 0;
+struct addrinfo *resfreer;
+struct addrinfo *pglobal;
+
+void talk_to_server (int sockfd) {
+
+	while (1) {
+        char editbuffer[BUF_SZ_2];
+        fprintf(stdout, ": ");
+
+        char *fgs = fgets(editbuffer, BUF_SZ_2, stdin);
+		socklen_t fgs_len = strlen(editbuffer);
+		if (fgs == NULL) {
+			continue;
+		}
+
+		bytes_sent = bytes_sent + sendto(sockfd, editbuffer, fgs_len, 0, pglobal->ai_addr, pglobal->ai_addrlen);	   
+	}
+}
+
+void INThandler() {
+
+	fprintf(stderr, "\nbytes sent: %ld\n", bytes_sent);
+	freeaddrinfo(resfreer);
+	close(sockfd);
+	exit(0);
+}
+
+int main (int argc, char *argv[]) {
+
+	if (argc != 2) {
+		fprintf(stderr, "USAGE: %s [IP]\n", argv[0]);
+		exit(__FAIL);
+	}
+	
+	int gai_result;
+	struct addrinfo hints;
+	struct addrinfo *res;
+	struct addrinfo *p;
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = AF_INET;
+	hints.ai_socktype = SOCK_DGRAM;
+	
+	gai_result = getaddrinfo(argv[1], __PORT, &hints, &res);
+	if (gai_result != 0) {
+		fprintf(stderr, "getaddrinfo: %d\n", gai_result);
+		exit(__FAIL);
+	}
+
+	for (p = res ; p != NULL ; p = p->ai_next) {
+
+		sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
+		if (sockfd == -1) {
+			fprintf(stderr, "socket fail\n");
+			continue;
+		} else {
+			pglobal = p;
+		}
+		
+	}
+	if (sockfd == -1) {
+		close(sockfd);
+		exit(__FAIL);
+	}
+
+	signal(SIGINT, INThandler);
+	resfreer = res;
+	talk_to_server(sockfd);
+	
+	return 0;
+}