完成了第 7 章 优雅的断开套接字的连接

ch07/file_client.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+
+#define BUF_SIZE 30
+void error_handling(char *message);
+
+int main(int argc, char *argv[])
+{
+    int sd;
+    FILE *fp;
+
+    char buf[BUF_SIZE];
+    int read_cnt;
+    struct sockaddr_in serv_adr;
+
+    if (argc != 3)
+    {
+        printf("Usage : %s <IP> <port>\n", argv[0]);
+        exit(1);
+    }
+
+    fp = fopen("receive.cpp", "wb");
+    sd = socket(PF_INET, SOCK_STREAM, 0);
+
+    memset(&serv_adr, 0, sizeof(serv_adr));
+    serv_adr.sin_family = AF_INET;
+    serv_adr.sin_addr.s_addr = inet_addr(argv[1]);
+    serv_adr.sin_port = htons(atoi(argv[2]));
+
+    connect(sd, (struct sockaddr *)&serv_adr, sizeof(serv_adr));
+
+    while ((read_cnt = read(sd, buf, BUF_SIZE)) != 0)
+        fwrite((void *)buf, 1, read_cnt, fp);
+
+    puts("Received file data");
+    write(sd, "Thank you", 10);
+    fclose(fp);
+    close(sd);
+    return 0;
+}
+
+void error_handling(char *message)
+{
+    fputs(message, stderr);
+    fputc('\n', stderr);
+    exit(1);
+}