1 files changed, 105 insertions, 0 deletions
diff --git a/serv.c b/serv.c
new file mode 100644
index 0000000..276404c
--- /dev/null
+++ b/serv.c
@@ -0,0 +1,105 @@
+/* A simple server to attach to
+*/
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <errno.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <netdb.h>
+
+char	*name;
+int	sock_fd;
+int	connect_fd;
+
+void	Socket(short);
+
+main(argc,argv)
+int argc;
+char *argv[];
+
+{
+    struct sockaddr_in addr;
+    char buff[1024];
+    int len;
+    int addrlen;
+
+    name=argv[0];
+
+    if (argc!=2)
+	{
+	fprintf(stderr,"%s: usage %s port\n",name,name);
+	exit(1);
+	}
+
+    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);
+	    exit(1);
+	    }
+
+	addrlen=sizeof(addr);
+	if (getsockname(connect_fd,&addr,&addrlen)!=0)
+	    perror(name);
+
+	printf("%s: connection ON port %d\n",name,ntohs(addr.sin_port));
+
+	addrlen=sizeof(addr);
+	if (getpeername(connect_fd,&addr,&addrlen)!=0)
+	    perror(name);
+
+	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)
+	{
+	perror(name);
+	exit(1);
+	}
+
+    /* 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);
+	}
+
+    if (listen(sock_fd,5)==-1)
+	{
+	perror(name);
+	exit(1);
+	}
+}