client

src/client.c

+
+#include "utils/crc.h"
+#include <fcntl.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <stdint.h>
 #include <stdio.h>
+#include <fcntl.h>
+#include "utils/error.h"
+#include "server/server.h"
+#include <sys/poll.h>
+#include <unistd.h>
+#include <sys/stat.h>
 
-int main(void)
+int main(int argc, char *argv[])
 {
-	printf("Hello world\n");
+	struct sockaddr_in addr;
+	int server;
+	if (argc != 4) {
+		BLAME("usage: %s <remote-host> <remote-port> <file>", argv[0]);
+	}
+	if ((server = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		PERROR("socket");
+		return 1;
+	}
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(atoi(argv[2]));
+	if (!inet_aton(argv[1], &addr.sin_addr))
+		BLAME("invalid remote host: %s", argv[1]);
+
+	if (connect(server, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+		close(server);
+		PERROR("connect");
+		return 1;
+	}
+	int fd = open(argv[3], O_RDONLY);
+	if (fd < 0) {
+		PERROR("open");
+		return 1;
+	}
+	struct stat statbuf;
+	CHK(fstat(fd, &statbuf));
+	uint16_t data;
+	uint16_t residue;
+	uint32_t to_send;
+	for (int i = 0; i < (int)(statbuf.st_size / sizeof(data) +
+				  statbuf.st_size % sizeof(data));
+	     i++) {
+		CHK(read(fd, &data, sizeof(data)));
+		to_send = data << 16;
+		residue = crc_crc((uint8_t *)&(to_send), 4, crc16_xmodem);
+		to_send |= residue;
+		if (send(server, &to_send, sizeof(to_send), 0) <= 0)
+			break;
+	}
 
-	return 0;
+	return EXIT_SUCCESS;
 }