From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 27 Jan 2008 11:37:44 +0100
Subject: Initial import (2.0.2-6)

---
 reference/C/CONTRIB/OR_USING_C/12.1.c | 112 ++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 reference/C/CONTRIB/OR_USING_C/12.1.c

(limited to 'reference/C/CONTRIB/OR_USING_C/12.1.c')

diff --git a/reference/C/CONTRIB/OR_USING_C/12.1.c b/reference/C/CONTRIB/OR_USING_C/12.1.c
new file mode 100644
index 0000000..3685c34
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/12.1.c
@@ -0,0 +1,112 @@
+/*
+ * Connects to the local host at port 1234.
+ */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+
+#define NSTRS     3     /* no. of strings  */
+
+/*
+ * Strings we send to the server.
+ */
+char *strs[NSTRS] = {
+    "This is the first string from the client.\n",
+    "This is the second string from the client.\n",
+    "This is the third string from the client.\n"
+};
+
+extern int errno;
+
+main()
+{
+    char c;
+    FILE *fp;
+    char hostname[64];
+    register int i, s;
+    struct hostent *hp;
+    struct sockaddr_in sin;
+
+    /*
+     * Before we can do anything, we need to know
+     * our hostname.
+     */
+    gethostname(hostname, sizeof(hostname));
+
+    /*
+     * Next, we need to look up the network
+     * address of our host.
+     */
+    if ((hp = gethostbyname(hostname)) == NULL) {
+        fprintf(stderr, "%s: unknown host.\n", hostname);
+        exit(1);
+    }
+
+    /*
+     * Get a socket to work with.  This socket will
+     * be in the Internet domain, and will be a
+     * stream socket.
+     */
+    if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        perror("client: socket");
+        exit(1);
+    }
+
+    /*
+     * Create the address we will be connecting to.
+     * We use port 1234 but put it into network
+     * byte order.  Also, we use bcopy (see Chapter
+     * 14) to copy the network number.
+     */
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons(1234);
+    bcopy(hp->h_addr, &sin.sin_addr, hp->h_length);
+
+    /*
+     * Try to connect to the address.  For this to
+     * succeed, the server must already have bound
+     * this address, and must have issued a listen()
+     * request.
+     */
+    if (connect(s, &sin, sizeof(sin)) < 0) {
+        perror("client: connect");
+        exit(1);
+    }
+
+    /*
+     * We'll use stdio for reading
+     * the socket.
+     */
+    fp = fdopen(s, "r");
+
+    /*
+     * First we read some strings from the server
+     * and print them out.
+     */
+    for (i = 0; i < NSTRS; i++) {
+        while ((c = fgetc(fp)) != EOF) {
+            putchar(c);
+
+            if (c == '\n')
+                break;
+        }
+    }
+
+    /*
+     * Now we send some strings to the server.
+     */
+    for (i = 0; i < NSTRS; i++)
+        send(s, strs[i], strlen(strs[i]), 0);
+
+
+    /*
+     * We can simply use close() to terminate the
+     * connection, since we're done with both sides.
+     */
+    close(s);
+
+    exit(0);
+}
+
-- 
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