Duzy commit ze smieciami

1 files changed, 41 insertions, 0 deletions

diff --git a/semestr-4/sieci/pracownia2/udp_client.c b/semestr-4/sieci/pracownia2/udp_client.c
new file mode 100755
index 0000000..4e7dce4
--- /dev/null
+++ b/semestr-4/sieci/pracownia2/udp_client.c
@@ -0,0 +1,41 @@
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+int main(int argc, char * argv[])
+{
+	if (argc < 2) {
+		printf("Usage:\n\t%s [server ip]\n", argv[0]);
+		return -1;
+	}
+
+	int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sockfd < 0) {
+		fprintf(stderr, "socket error: %s\n", strerror(errno)); 
+		return EXIT_FAILURE;
+	}
+
+	struct sockaddr_in server_address;
+	bzero (&server_address, sizeof(server_address));
+	server_address.sin_family      = AF_INET;
+	server_address.sin_port        = htons(54321);
+	if (!inet_pton(AF_INET, argv[1], &server_address.sin_addr)) {
+		printf("Inavlid ip address\n");
+		return -1;
+	}
+
+	char* message = "Hello server!";
+	ssize_t message_len = strlen(message);
+	if (sendto(sockfd, message, message_len, 0, (struct sockaddr*) &server_address, sizeof(server_address)) != message_len) {
+		fprintf(stderr, "sendto error: %s\n", strerror(errno)); 
+		return EXIT_FAILURE;		
+	}
+
+	close (sockfd);
+	return EXIT_SUCCESS;
+}
+