From e3c10bc9343baa5ea3dcc57063d28b3742479245 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Mon, 8 Nov 2010 15:34:07 +0000
Subject: Tidied up serv.c

---
 serv.c | 118 +++++++++++++++++++++++++++++++++++------------------------------
 1 file changed, 63 insertions(+), 55 deletions(-)

(limited to 'serv.c')

diff --git a/serv.c b/serv.c
index 276404c..e7bbcac 100644
--- a/serv.c
+++ b/serv.c
@@ -1,105 +1,113 @@
 /* A simple server to attach to
 */
-#include <sys/types.h>
-
+#include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <errno.h>
 
+#include <sys/types.h>
+
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <netdb.h>
 
-char	*name;
-int	sock_fd;
-int	connect_fd;
+static const char *name;
+
+static int Socket(int p)
+{
+    struct sockaddr_in addr;
+    int sock_fd;
+
+    if ((sock_fd=socket(AF_INET,SOCK_STREAM,0))==-1)
+    {
+	perror("socket");
+	exit(EXIT_FAILURE);
+    }
+
+    /* Bind port to address
+    */
+    addr.sin_family=AF_INET;
+    addr.sin_addr.s_addr=INADDR_ANY;
+    addr.sin_port=htons(p);
+
+    if (bind(sock_fd,(void*)&addr,sizeof(addr))==-1)
+    {
+	perror("bind");
+	exit(EXIT_FAILURE);
+    }
 
-void	Socket(short);
+    if (listen(sock_fd,5)==-1)
+    {
+	perror("listen");
+	exit(EXIT_FAILURE);
+    }
 
-main(argc,argv)
-int argc;
-char *argv[];
+    return sock_fd;
+}
 
+int main(int argc, char *argv[])
 {
     struct sockaddr_in addr;
     char buff[1024];
     int len;
     int addrlen;
+    int sock_fd;
+    int connect_fd;
 
     name=argv[0];
 
     if (argc!=2)
-	{
-	fprintf(stderr,"%s: usage %s port\n",name,name);
+    {
+	fprintf(stderr,"%s: usage %s port\n", name, name);
 	exit(1);
-	}
+    }
 
-    Socket((short)atoi(argv[1]));
+    sock_fd = Socket((short)atoi(argv[1]));
 
     printf("%s: socket bound\n",name);
 
     while(1)
-	{
+    {
 	printf("%s: accepting\n",name);
+
 	if ((connect_fd=accept(sock_fd,NULL,0))==-1)
-	    {
-	    perror(name);
+	{
+	    perror("accept");
 	    exit(1);
-	    }
+	}
 
 	addrlen=sizeof(addr);
-	if (getsockname(connect_fd,&addr,&addrlen)!=0)
-	    perror(name);
+
+	if (getsockname(connect_fd,(void*)&addr,&addrlen)!=0)
+	{
+	    perror("getsockname");
+	}
 
 	printf("%s: connection ON port %d\n",name,ntohs(addr.sin_port));
 
 	addrlen=sizeof(addr);
-	if (getpeername(connect_fd,&addr,&addrlen)!=0)
-	    perror(name);
+
+	if (getpeername(connect_fd,(void*)&addr,&addrlen)!=0)
+	{
+	    perror("getpeername");
+	}
 
 	printf("%s: connection FROM port %d\n",name,ntohs(addr.sin_port));
 
 	while((len=read(connect_fd,buff,1024))>0)
-	    {
+	{
 	    buff[len]=0;
 	    printf("%s: recieved '%s'\n",name,buff);
-	    write(connect_fd,buff,len);
-	    }
-
-	perror(name);
-
-	close(connect_fd);
 	}
 
-    return(0);
-}
-
-
-void Socket(short p)
-{
-    struct sockaddr_in addr;
-
-    if ((sock_fd=socket(AF_INET,SOCK_STREAM,0))==-1)
+	if (len == -1)
 	{
-	perror(name);
-	exit(1);
+	    perror("read");
 	}
 
-    /* Bind port to address
-    */
-    addr.sin_family=AF_INET;
-    addr.sin_addr.s_addr=INADDR_ANY;
-    addr.sin_port=htons(p);
-
-    if (bind(sock_fd,&addr,sizeof(addr))==-1)
-	{
-	perror(name);
-	exit(1);
-	}
+	close(connect_fd);
+    }
 
-    if (listen(sock_fd,5)==-1)
-	{
-	perror(name);
-	exit(1);
-	}
+    return EXIT_SUCCESS;
 }
-- 
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