uIPManagement.c 7.14 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/*
             LUFA Library
     Copyright (C) Dean Camera, 2010.
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

/*
  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this 
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in 
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting 
  documentation, and that the name of the author not be used in 
  advertising or publicity pertaining to distribution of the 
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
33
 *  uIP Management functions. This file contains the functions and globals needed to maintain the uIP
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 *  stack once an RNDIS device has been attached to the system.
 */

#define  INCLUDE_FROM_UIPMANAGEMENT_C
#include "uIPManagement.h"

/** Connection timer, to retain the time elapsed since the last time the uIP connections were managed. */
struct timer ConnectionTimer;

/** ARP timer, to retain the time elapsed since the ARP cache was last updated. */
struct timer ARPTimer;

/** MAC address of the RNDIS device, when enumerated */
struct uip_eth_addr MACAddress;


/** Configures the uIP stack ready for network traffic. */
void uIPManagement_Init(void)
{
	/* uIP Timing Initialization */
	clock_init();
55
	timer_set(&ConnectionTimer, CLOCK_SECOND / 10);
56
57
58
59
	timer_set(&ARPTimer, CLOCK_SECOND * 10);	

	/* uIP Stack Initialization */
	uip_init();
60
	uip_arp_init();
61
	uip_setethaddr(MACAddress);
62
63
64

	/* DHCP/Server IP Settings Initialization */
	#if defined(ENABLE_DHCP)
65
	DHCPClientApp_Init();
66
67
68
69
70
71
72
73
74
75
76
	#else
	uip_ipaddr_t IPAddress, Netmask, GatewayIPAddress;
	uip_ipaddr(&IPAddress,        DEVICE_IP_ADDRESS[0], DEVICE_IP_ADDRESS[1], DEVICE_IP_ADDRESS[2], DEVICE_IP_ADDRESS[3]);
	uip_ipaddr(&Netmask,          DEVICE_NETMASK[0],    DEVICE_NETMASK[1],    DEVICE_NETMASK[2],    DEVICE_NETMASK[3]);
	uip_ipaddr(&GatewayIPAddress, DEVICE_GATEWAY[0],    DEVICE_GATEWAY[1],    DEVICE_GATEWAY[2],    DEVICE_GATEWAY[3]);
	uip_sethostaddr(&IPAddress);
	uip_setnetmask(&Netmask);
	uip_setdraddr(&GatewayIPAddress);
	#endif
	
	/* HTTP Webserver Initialization */
77
	HTTPServerApp_Init();
78
79
80
	
	/* TELNET Server Initialization */
	TELNETServerApp_Init();
81
82
83
84
85
86
87
88
89
}

/** uIP Management function. This function manages the uIP stack when called while an RNDIS device has been
 *  attached to the system.
 */
void uIPManagement_ManageNetwork(void)
{
	if ((USB_CurrentMode == USB_MODE_HOST) && (USB_HostState == HOST_STATE_Configured))
	{
90
		uIPManagement_ProcessIncomingPacket();
91
92
93
94
		uIPManagement_ManageConnections();
	}
}

95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
/** uIP TCP/IP network stack callback function for the processing of a given TCP connection. This routine dispatches
 *  to the appropriate TCP protocol application based on the connection's listen port number.
 */
void uIPManagement_TCPCallback(void)
{
	/* Call the correct TCP application based on the port number the connection is listening on */
	switch (uip_conn->lport)
	{
		case HTONS(HTTP_SERVER_PORT):
			HTTPServerApp_Callback();
			break;
		case HTONS(TELNET_SERVER_PORT):
			TELNETServerApp_Callback();
			break;
	}
}

/** uIP TCP/IP network stack callback function for the processing of a given UDP connection. This routine dispatches
 *  to the appropriate UDP protocol application based on the connection's listen port number.
 */
void uIPManagement_UDPCallback(void)
{
	/* Call the correct UDP application based on the port number the connection is listening on */
	switch (uip_udp_conn->lport)
	{
		case HTONS(DHCPC_CLIENT_PORT):
			DHCPClientApp_Callback();
			break;
	}
}

126
127
/** Processes Incoming packets to the server from the connected RNDIS device, creating responses as needed. */
static void uIPManagement_ProcessIncomingPacket(void)
128
{
129
130
131
132
133
	/* If no packet received, exit processing routine */
	if (!(RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface)))
	  return;
	  
	LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
134

135
	/* Read the Incoming packet straight into the UIP packet buffer */
136
	RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, uip_buf, &uip_len);
137

138
139
140
141
	/* If the packet contains an Ethernet frame, process it */
	if (uip_len > 0)
	{
		switch (((struct uip_eth_hdr*)uip_buf)->type)
142
		{
143
			case HTONS(UIP_ETHTYPE_IP):
144
145
146
				/* Filter packet by MAC destination */
				uip_arp_ipin();

147
				/* Process Incoming packet */
148
149
				uip_input();

150
				/* If a response was generated, send it */
151
				if (uip_len > 0)
152
153
154
155
156
157
158
159
160
				{
					/* Add destination MAC to outgoing packet */
					uip_arp_out();

					RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
				}
				
				break;
			case HTONS(UIP_ETHTYPE_ARP):
161
162
				/* Process ARP packet */
				uip_arp_arpin();
163
164
165
166
167
168
				
				/* If a response was generated, send it */
				if (uip_len > 0)
				  RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
				
				break;
169
170
		}
	}
171
172

	LEDs_SetAllLEDs(LEDMASK_USB_READY);
173
174
175
176
177
}

/** Manages the currently open network connections, including TCP and (if enabled) UDP. */
static void uIPManagement_ManageConnections(void)
{
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
	/* Poll TCP connections for more data to send back to the host */
	for (uint8_t i = 0; i < UIP_CONNS; i++)
	{
		uip_poll_conn(&uip_conns[i]);

		/* If a response was generated, send it */
		if (uip_len > 0)
		{
			/* Add destination MAC to outgoing packet */
			uip_arp_out();

			RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
		}
	}

193
	/* Manage open connections for timeouts */
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
	if (timer_expired(&ConnectionTimer))
	{
		timer_reset(&ConnectionTimer);

		LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
		
		for (uint8_t i = 0; i < UIP_CONNS; i++)
		{
			/* Run periodic connection management for each TCP connection */
			uip_periodic(i);

			/* If a response was generated, send it */
			if (uip_len > 0)
			{
				/* Add destination MAC to outgoing packet */
				uip_arp_out();

211
				RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
212
213
214
			}
		}
		
215
		#if defined(ENABLE_DHCP_CLIENT)
216
217
218
219
220
221
222
223
224
225
226
		for (uint8_t i = 0; i < UIP_UDP_CONNS; i++)
		{
			/* Run periodic connection management for each UDP connection */
			uip_udp_periodic(i);

			/* If a response was generated, send it */
			if (uip_len > 0)
			{
				/* Add destination MAC to outgoing packet */
				uip_arp_out();

227
				RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
228
229
230
231
232
233
234
235
236
237
238
239
240
241
			}
		}
		#endif

		LEDs_SetAllLEDs(LEDMASK_USB_READY);
	}

	/* Manage ARP cache refreshing */
	if (timer_expired(&ARPTimer))
	{
		timer_reset(&ARPTimer);
		uip_arp_timer();
	}
}