From 22a3f2e6e1796162542447f45a71bfd0e3288f3a Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 3 Mar 2020 20:08:50 +0000
Subject: Changed client to the server.

---
 server/nfts.c | 176 +++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 137 insertions(+), 39 deletions(-)

diff --git a/server/nfts.c b/server/nfts.c
index 18ab896..634f184 100644
--- a/server/nfts.c
+++ b/server/nfts.c
@@ -1,4 +1,4 @@
-/*  Next File Transfer Client
+/*  Next File Transfer Server
     Copyright (C) 2020  Ian Cowburn
 
     This program is free software: you can redistribute it and/or modify
@@ -82,32 +82,32 @@ static char *GetLine(char *buff, size_t len)
 }
 
 
-static int Connect(const char *n, int p)
+static int Socket(int p)
 {
-    struct hostent *remote;
     struct sockaddr_in addr;
     int sock;
 
-    if (!(remote = gethostbyname(n)))
+    if ((sock = socket(AF_INET,SOCK_STREAM,0))==-1)
     {
-	fprintf(stderr,"%s: unknown host %s\n",name,n);
+	perror("socket");
 	exit(EXIT_FAILURE);
     }
 
-    memcpy(&addr.sin_addr, remote->h_addr, remote->h_length);
+    /* Bind port to address
+    */
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = INADDR_ANY;
+    addr.sin_port = htons(p);
 
-    if ((sock = socket(AF_INET, SOCK_STREAM, 0))==-1)
+    if (bind(sock, (void*)&addr, sizeof(addr))==-1)
     {
-	perror(name);
+	perror("bind");
 	exit(EXIT_FAILURE);
     }
 
-    addr.sin_family = AF_INET;
-    addr.sin_port = htons(p);
-
-    if (connect(sock,(void*)&addr,sizeof(addr)) == -1)
+    if (listen(sock, 5)==-1)
     {
-	perror(name);
+	perror("listen");
 	exit(EXIT_FAILURE);
     }
 
@@ -449,11 +449,60 @@ static int Mkdir(int sock, const char *path)
 }
 
 
+static int Ls(int sock)
+{
+    int quit = 0;
+    char status[3] = {0};
+
+    if (!Write(sock, "LS", 2))
+    {
+	quit = 1;
+    }
+
+    if (!quit && Read(sock, status, 2))
+    {
+	if (strcmp(status, "!E") == 0)
+	{
+	    printf("Command failed\n");
+	}
+	else if (strcmp(status, "OK") == 0)
+	{
+	    int no;
+	    int f;
+	    char buff[1024];
+
+	    no = ReadSize(sock);
+
+	    for(f = 0; f < no; f++)
+	    {
+		int size;
+
+		size = ReadSize(sock);
+		Read(sock, buff, size);
+		buff[size] = 0;
+
+		printf("%s\n", buff);
+	    }
+	}
+	else
+	{
+	    printf("Unknown status '%s'\n", status);
+	}
+    }
+    else
+    {
+	quit = 1;
+    }
+
+    return quit;
+}
+
+
 int main(int argc, char *argv[])
 {
-    char buff[1024];
     int sock;
-    int quit = 0;
+    int port;
+    int quit;
 
     if ((name = strrchr(argv[0], '/')))
     {
@@ -464,43 +513,92 @@ int main(int argc, char *argv[])
     	name = argv[0];
     }
 
-    if (argc<3)
+    if (argc<2)
     {
-	fprintf(stderr,"%s: usage %s host port\n",name,name);
+	fprintf(stderr, "%s: usage %s port\n", name, name);
 	exit(EXIT_FAILURE);
     }
 
-    sock = Connect(argv[1],atoi(argv[2]));
+    port = atoi(argv[1]);
+    sock = Socket(port);
 
-    while(!quit && GetLine(buff, sizeof buff))
+    quit = 0;
+
+    while(!quit)
     {
-    	char *tok;
+	char buff[1024];
+	char *p;
+	int closed;
+	int fd;
 
-	tok = strtok(buff, " \t");
+	printf("%s: listening on port %d\n", name, port);
 
-	if (strcmp(tok, "exit") == 0)
-	{
-	    break;
-	}
-	else if (strcmp(tok, "put") == 0)
-	{
-	    quit = Put(sock, strtok(NULL, " \t"));
-	}
-	else if (strcmp(tok, "get") == 0)
-	{
-	    quit = Get(sock, strtok(NULL, " \t"));
-	}
-	else if (strcmp(tok, "cd") == 0)
+	if ((fd = accept(sock, NULL, 0)) == -1)
 	{
-	    quit = Cd(sock, strtok(NULL, " \t"));
+	    perror("accept");
+	    exit(EXIT_FAILURE);
 	}
-	else if (strcmp(tok, "mkdir") == 0)
+
+	printf("%s: accepted connection\n", name);
+
+	closed = 0;
+
+	while(!closed && (p = GetLine(buff, sizeof buff)))
 	{
-	    quit = Mkdir(sock, strtok(NULL, " \t"));
+	    char *tok;
+
+	    tok = strtok(buff, " \t");
+
+	    if (strcmp(tok, "put") == 0)
+	    {
+		closed = Put(fd, strtok(NULL, " \t"));
+	    }
+	    else if (strcmp(tok, "get") == 0)
+	    {
+		closed = Get(fd, strtok(NULL, " \t"));
+	    }
+	    else if (strcmp(tok, "cd") == 0)
+	    {
+		closed = Cd(fd, strtok(NULL, " \t"));
+	    }
+	    else if (strcmp(tok, "mkdir") == 0)
+	    {
+		closed = Mkdir(fd, strtok(NULL, " \t"));
+	    }
+	    else if (strcmp(tok, "ls") == 0)
+	    {
+		closed = Ls(fd);
+	    }
+	    else if (strcmp(tok, "close") == 0)
+	    {
+		closed = 1;
+	    }
+	    else if (strcmp(tok, "exit") == 0)
+	    {
+		closed = 1;
+		quit = 1;
+	    }
+	    else if (strcmp(tok, "help") == 0)
+	    {
+	    	printf("put <file>\n");
+	    	printf("get <file>\n");
+	    	printf("cd <path>\n");
+	    	printf("mkdir <path>\n");
+	    	printf("ls\n");
+	    	printf("close\n");
+	    	printf("exit\n");
+	    }
+	    else
+	    {
+		printf("Unrecognised command '%s'\n", tok);
+	    }
 	}
-	else
+
+	close(fd);
+
+	if (!p)
 	{
-	    printf("Unrecognised command '%s'\n", tok);
+	    quit = 1;
 	}
     }
 
-- 
cgit v1.2.3