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lwip-contrib-mac/ports/win32/pktdrv.c

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/*
* Copyright (c) 2001,2002 Florian Schulze.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the authors nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* pktdrv.c - This file is part of lwIP pktif
*
****************************************************************************
*
* This file is derived from an example in lwIP with the following license:
*
* Copyright (c) 2001, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "pktdrv.h"
#define WIN32_LEAN_AND_MEAN
/* get the windows definitions of the following 4 functions out of the way */
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include <packet32.h>
#include <ntddndis.h>
/** @todo use the lwip header file */
#define ETHARP_HWADDR_LEN 6
#define MAX_NUM_ADAPTERS 10
#define ADAPTER_NAME_LEN 4096
#define PACKET_ADAPTER_BUFSIZE 512000
#define PACKET_INPUT_BUFSIZE 256000
#define PACKET_OID_DATA_SIZE 255
/* Packet Adapter informations */
struct packet_adapter {
input_fn input;
void *input_fn_arg;
LPADAPTER lpAdapter;
LPPACKET lpPacket;
UINT bs_drop;
NDIS_MEDIA_STATE fNdisMediaState;
/* buffer to hold the data coming from the driver */
char buffer[PACKET_INPUT_BUFSIZE];
};
/**
* Open a network adapter and set it up for packet input
*
* @param adapter_num the index of the adapter to use
* @param mac_addr the MAC address of the adapter is stored here (if != NULL)
* @param input a function to call to receive a packet
* @param arg argument to pass to input
* @return an adapter handle on success, NULL on failure
*/
void*
init_adapter(int adapter_num, char *mac_addr, input_fn input, void *arg)
{
void *AdapterList[MAX_NUM_ADAPTERS];
int i;
char AdapterName[ADAPTER_NAME_LEN]; /* string that contains a list of the network adapters */
char *temp, *start;
int AdapterNum =0;
ULONG AdapterLength;
PPACKET_OID_DATA ppacket_oid_data;
unsigned char ethaddr[ETHARP_HWADDR_LEN];
struct packet_adapter *pa;
pa = malloc(sizeof(struct packet_adapter));
if (!pa) {
printf("Unable to alloc the adapter!\n");
return NULL;
}
memset(pa, 0, sizeof(struct packet_adapter));
pa->input = input;
pa->input_fn_arg = arg;
memset(AdapterList, 0, sizeof(AdapterList));
memset(AdapterName, 0, sizeof(AdapterName));
/* obtain the name of the adapters installed on this machine
(a list of strings separated by '\0') */
AdapterLength = ADAPTER_NAME_LEN;
if (PacketGetAdapterNames((char*)AdapterName, &AdapterLength)==FALSE){
printf("Unable to retrieve the list of the adapters!\n");
free(pa);
return NULL;
}
/* get the start of each adapter name in the list and put it into
* the AdapterList array */
i = 0;
temp = AdapterName;
start = AdapterName;
while ((*temp != '\0') || (*(temp - 1) != '\0')) {
if (*temp == '\0') {
AdapterList[i] = start;
start = temp + 1;
i++;
if (i >= MAX_NUM_ADAPTERS) {
break;
}
}
temp++;
}
/* print all adapter names */
AdapterNum = i;
if (AdapterNum <= 0) {
free(pa);
return NULL; /* no adapters found */
}
for (i = 0; i < AdapterNum; i++) {
printf("%2i: %s\n", i, AdapterList[i]);
}
/* invalid adapter index -> check this after printing the adapters */
if (adapter_num < 0) {
printf("Invalid adapter_num: %d\n", adapter_num);
free(pa);
return NULL;
}
/* adapter index out of range */
if (adapter_num > AdapterNum) {
printf("Invalid adapter_num: %d\n", adapter_num);
free(pa);
return NULL;
}
/* set up the selected adapter */
pa->lpAdapter = PacketOpenAdapter(AdapterList[adapter_num]);
if (!pa->lpAdapter || (pa->lpAdapter->hFile == INVALID_HANDLE_VALUE)) {
free(pa);
return NULL;
}
/* alloc the OID packet */
ppacket_oid_data = malloc(sizeof(PACKET_OID_DATA) + PACKET_OID_DATA_SIZE);
if (!ppacket_oid_data) {
free(pa);
return NULL;
}
/* get the description of the selected adapter */
ppacket_oid_data->Oid = OID_GEN_VENDOR_DESCRIPTION;
ppacket_oid_data->Length = PACKET_OID_DATA_SIZE;
if (PacketRequest(pa->lpAdapter, FALSE, ppacket_oid_data)) {
printf("USE: %s", ppacket_oid_data->Data);
}
/* get the MAC address of the selected adapter */
ppacket_oid_data->Oid = OID_802_3_PERMANENT_ADDRESS;
ppacket_oid_data->Length = ETHARP_HWADDR_LEN;
if (!PacketRequest(pa->lpAdapter, FALSE, ppacket_oid_data)) {
free(pa);
return NULL;
}
/* copy the MAC address */
memcpy(&ethaddr, ppacket_oid_data->Data, ETHARP_HWADDR_LEN);
free(ppacket_oid_data);
if (mac_addr != NULL) {
/* copy the MAC address to the user supplied buffer, also */
memcpy(mac_addr, &ethaddr, ETHARP_HWADDR_LEN);
}
printf(" [MAC: %02X:%02X:%02X:%02X:%02X:%02X]\n", ethaddr[0], ethaddr[1], ethaddr[2],
ethaddr[3], ethaddr[4], ethaddr[5]);
/* some more adapter settings */
PacketSetBuff(pa->lpAdapter, PACKET_ADAPTER_BUFSIZE);
PacketSetReadTimeout(pa->lpAdapter, 1);
PacketSetHwFilter(pa->lpAdapter, NDIS_PACKET_TYPE_ALL_LOCAL | NDIS_PACKET_TYPE_PROMISCUOUS);
/* set up packet descriptor (the application input buffer) */
if ((pa->lpPacket = PacketAllocatePacket()) == NULL) {
free(pa);
return NULL;
}
PacketInitPacket(pa->lpPacket,(char*)pa->buffer, sizeof(pa->buffer));
return pa;
}
/**
* Close the adapter (no more packets can be sent or received)
*
* @param adapter adapter handle received by a call to init_adapter, invalid on return
*/
void
shutdown_adapter(void *adapter)
{
struct packet_adapter *pa = (struct packet_adapter*)adapter;
if (pa != NULL) {
PacketFreePacket(pa->lpPacket);
PacketCloseAdapter(pa->lpAdapter);
free(pa);
}
}
/**
* Send a packet
*
* @param adapter adapter handle received by a call to init_adapter
* @param buffer complete packet to send (including ETH header; without CRC)
* @param len length of the packet (including ETH header; without CRC)
*/
int
packet_send(void *adapter, void *buffer, int len)
{
struct packet_adapter *pa = (struct packet_adapter*)adapter;
LPPACKET lpPacket;
if (pa == NULL) {
return -1;
}
if ((lpPacket = PacketAllocatePacket()) == NULL) {
return -1;
}
PacketInitPacket(lpPacket, buffer, len);
if (!PacketSendPacket(pa->lpAdapter, lpPacket, TRUE)) {
return -1;
}
PacketFreePacket(lpPacket);
return 0;
}
/**
* Process a packet buffer (which can hold multiple packets) and feed
* every packet to process_input().
*
* @param adapter adapter handle received by a call to init_adapter
* @param lpPacket the packet buffer to process
*/
static void
ProcessPackets(void *adapter, LPPACKET lpPacket)
{
struct packet_adapter *pa = (struct packet_adapter*)adapter;
ULONG ulLines, ulBytesReceived;
char *base;
char *buf;
u_int off = 0;
u_int tlen, tlen1;
struct bpf_hdr *hdr;
void *cur_packet;
int cur_length;
if (pa == NULL) {
return;
}
ulBytesReceived = lpPacket->ulBytesReceived;
buf = lpPacket->Buffer;
off=0;
while (off < ulBytesReceived) {
hdr = (struct bpf_hdr *)(buf + off);
tlen1 = hdr->bh_datalen;
cur_length = tlen1;
tlen = hdr->bh_caplen;
off += hdr->bh_hdrlen;
ulLines = (tlen + 15) / 16;
if (ulLines > 5) {
ulLines = 5;
}
base =(char*)(buf + off);
cur_packet = base;
off = Packet_WORDALIGN(off + tlen);
pa->input(pa->input_fn_arg, cur_packet, cur_length);
}
}
/**
* Check for newly received packets. Called in the main loop: 'interrupt' mode is not
* really supported :(
*
* @param adapter adapter handle received by a call to init_adapter
*/
void
update_adapter(void *adapter)
{
struct packet_adapter *pa = (struct packet_adapter*)adapter;
struct bpf_stat stat;
/* print the capture statistics */
if(PacketGetStats(pa->lpAdapter, &stat) == FALSE) {
printf("Warning: unable to get stats from the kernel!\n");
} else {
if (pa->bs_drop != stat.bs_drop) {
printf("%d packets received.\n%d Packets dropped.\n", stat.bs_recv, stat.bs_drop);
pa->bs_drop = stat.bs_drop;
}
}
if ((pa != NULL) && (PacketReceivePacket(pa->lpAdapter, pa->lpPacket, TRUE))) {
ProcessPackets(adapter, pa->lpPacket);
}
}
/**
* Check for link state changes. Called in the main loop: 'interrupt' mode is not
* really supported :(
*
* @param adapter adapter handle received by a call to init_adapter
* @return one of the link_adapter_event values
*/
enum link_adapter_event
link_adapter(void *adapter)
{
struct packet_adapter *pa = (struct packet_adapter*)adapter;
if (pa != NULL) {
PPACKET_OID_DATA ppacket_oid_data;
NDIS_MEDIA_STATE fNdisMediaState = pa->fNdisMediaState;
/* get the media connect status of the selected adapter */
ppacket_oid_data = malloc(sizeof(PACKET_OID_DATA) + sizeof(NDIS_MEDIA_STATE));
if (ppacket_oid_data) {
ppacket_oid_data->Oid = OID_GEN_MEDIA_CONNECT_STATUS;
ppacket_oid_data->Length = sizeof(NDIS_MEDIA_STATE);
if (PacketRequest(pa->lpAdapter, FALSE, ppacket_oid_data)) {
fNdisMediaState = (*((PNDIS_MEDIA_STATE)(ppacket_oid_data->Data)));
}
free(ppacket_oid_data);
}
if (pa->fNdisMediaState != fNdisMediaState) {
pa->fNdisMediaState = fNdisMediaState;
return ((fNdisMediaState == NdisMediaStateConnected) ? LINKEVENT_UP : LINKEVENT_DOWN);
}
}
return LINKEVENT_UNCHANGED;
}
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