1 files changed, 126 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/12.2.c b/reference/C/CONTRIB/OR_USING_C/12.2.c
new file mode 100644
index 0000000..ed64580
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/12.2.c
@@ -0,0 +1,126 @@
+/*
+ * Connects to port 1234 on the local host.
+ */
+#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 client.
+ */
+char *strs[NSTRS] = {
+    "This is the first string from the server.\n",
+    "This is the second string from the server.\n",
+    "This is the third string from the server.\n"
+};
+
+extern int errno;
+
+main()
+{
+    char c;
+    FILE *fp;
+    int fromlen;
+    char hostname[64];
+    struct hostent *hp;
+    register int i, s, ns;
+    struct sockaddr_in sin, fsin;
+
+    /*
+     * Before we can do anything, we need
+     * to know our hostname.
+     */
+    gethostname(hostname, sizeof(hostname));
+
+    /*
+     * Now we look up our host to get
+     * its network number.
+     */
+    if ((hp = gethostbyname(hostname)) == NULL) {
+        fprintf(stderr, "%s: host unknown.\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("server: socket");
+        exit(1);
+    }
+
+    /*
+     * Create the address that we will be binding 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 bind the address to the socket.
+     */
+    if (bind(s, &sin, sizeof(sin)) < 0) {
+        perror("server: bind");
+        exit(1);
+    }
+
+    /*
+     * Listen on the socket.
+     */
+    if (listen(s, 5) < 0) {
+        perror("server: listen");
+        exit(1);
+    }
+
+    /*
+     * Accept connections.  When we accept one, ns
+     * will be connected to the client.  fsin will
+     * contain the address of the client.
+     */
+    if ((ns = accept(s, &fsin, &fromlen)) < 0) {
+        perror("server: accept");
+        exit(1);
+    }
+
+    /*
+     * We'll use stdio for reading the socket.
+     */
+    fp = fdopen(ns, "r");
+
+    /*
+     * First we send some strings to the client.
+     */
+    for (i = 0; i < NSTRS; i++)
+        send(ns, strs[i], strlen(strs[i]), 0);
+
+    /*
+     * Then we read some strings from the client
+     * and print them out.
+     */
+    for (i = 0; i < NSTRS; i++) {
+        while ((c = fgetc(fp)) != EOF) {
+            putchar(c);
+
+            if (c == '\n')
+                break;
+        }
+    }
+
+    /*
+     * We can simply use close() to terminate the
+     * connection, since we're done with both sides.
+     */
+    close(s);
+
+    exit(0);
+}
+