[Assorted-commits] SF.net SVN: assorted: [650] sandbox/trunk/src/c/client.c

[<yan...@us...>]

Revision: 650
          http://assorted.svn.sourceforge.net/assorted/?rev=650&view=rev
Author:   yangzhang
Date:     2008-04-01 20:39:21 -0700 (Tue, 01 Apr 2008)

Log Message:
-----------
added simple tcp client example

Added Paths:
-----------
    sandbox/trunk/src/c/client.c

Added: sandbox/trunk/src/c/client.c
===================================================================
--- sandbox/trunk/src/c/client.c	                        (rev 0)
+++ sandbox/trunk/src/c/client.c	2008-04-02 03:39:21 UTC (rev 650)
@@ -0,0 +1,63 @@
+#include <strings.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+
+int
+main()
+{
+  // Create socket.
+  int s = socket(AF_INET, SOCK_STREAM, 0);
+  if (s == 0) {
+    perror("socket");
+    return 1;
+  }
+
+  // Create remote socket address.
+  struct sockaddr_in sa;
+  bzero(&sa, sizeof sa);
+  sa.sin_family = AF_INET;
+
+  // Use port number.
+  sa.sin_port = htons(80);
+
+  // Look up by service name.
+  struct servent *sp = getservbyname("http", "tcp");
+  if (sp == NULL) {
+    perror("getservbyname");
+    return 1;
+  }
+  // getservbyname already returns the port in.
+  sa.sin_port = sp->s_port;
+  //printf("%d\n", sa.sin_port);
+
+  // Use string IP address.
+  sa.sin_addr.s_addr = inet_addr("127.0.0.1");
+  if (sa.sin_addr.s_addr == -1) {
+    perror("inet_addr");
+    return 1;
+  }
+
+  // Look up by hostname.
+  struct hostent *h = gethostbyname("www.google.com");
+  if (h == NULL) {
+    perror("gethostbyname");
+    return 1;
+  }
+  bcopy(h->h_addr, (char*) &sa.sin_addr, h->h_length);
+
+  // Connect.
+  if (connect(s, (struct sockaddr*) &sa, sizeof sa) != 0) {
+    perror("connect");
+    close(s);
+    return 1;
+  }
+
+  // Close socket.
+  close(s);
+
+  return 0;
+}


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