lwip-contrib-mac/ports/win32/pktif.c
2010-04-14 14:32:48 +00:00

465 lines
15 KiB
C

/*
* 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.
*
* pktif.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 "lwip/opt.h"
#if LWIP_ETHERNET
#include "pktif.h"
/* get the windows definitions of the following 4 functions out of the way */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "lwip/debug.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/stats.h"
#include "lwip/sys.h"
#include "lwip/ip.h"
#include "lwip/snmp.h"
#include "lwip/tcpip.h"
#include "netif/etharp.h"
#include "pktdrv.h"
#include "pcap_helper.h"
/* include the port-dependent configuration */
#include "lwipcfg_msvc.h"
/* Define those to better describe your network interface.
For now, we use 'e0', 'e1', 'e2' and so on */
#define IFNAME0 'e'
#define IFNAME1 '0'
/* index of the network adapter to use for lwIP */
#ifndef PACKET_LIB_ADAPTER_NR
#define PACKET_LIB_ADAPTER_NR 0
#endif
/* Define PHY delay when "link up" */
#ifndef PHY_LINKUP_DELAY
#define PHY_LINKUP_DELAY 5000
#endif
/* link state notification macro */
#if NO_SYS
#define NOTIFY_LINKSTATE(netif, linkfunc) linkfunc(netif)
#else /* NO_SYS*/
#if LWIP_TCPIP_TIMEOUT
#define NOTIFY_LINKSTATE(netif, linkfunc) tcpip_timeout(PHY_LINKUP_DELAY, (sys_timeout_handler)linkfunc, netif)
#else /* LWIP_TCPIP_TIMEOUT */
#define NOTIFY_LINKSTATE(netif, linkfunc) tcpip_callback((tcpip_callback_fn)linkfunc, netif)
#endif /* LWIP_TCPIP_TIMEOUT */
#endif /* NO_SYS*/
/* Forward declarations. */
void ethernetif_process_input(void *arg, void *packet, int len);
/*-----------------------------------------------------------------------------------*/
static void
low_level_init(struct netif *netif)
{
char adapter_mac_addr[ETHARP_HWADDR_LEN];
u8_t my_mac_addr[ETHARP_HWADDR_LEN] = LWIP_MAC_ADDR_BASE;
int adapter_num = PACKET_LIB_ADAPTER_NR;
enum link_adapter_event linkstate;
#ifdef PACKET_LIB_GET_ADAPTER_NETADDRESS
ip_addr_t netaddr;
#define GUID_LEN 128
char guid[GUID_LEN + 1];
memset(&guid, 0, sizeof(guid));
PACKET_LIB_GET_ADAPTER_NETADDRESS(&netaddr);
if (get_adapter_index_from_addr((struct in_addr *)&netaddr, guid, GUID_LEN) < 0) {
printf("ERROR initializing network adapter, failed to get GUID for network address %s\n", ip_ntoa(&netaddr));
LWIP_ASSERT("ERROR initializing network adapter, failed to get GUID for network address!", 0);
return;
}
adapter_num = get_adapter_index(guid);
if (adapter_num < 0) {
printf("ERROR finding network adapter with GUID \"%s\"!\n", guid);
LWIP_ASSERT("ERROR finding network adapter with expected GUID!", 0);
return;
}
#else /* PACKET_LIB_GET_ADAPTER_NETADDRESS */
#ifdef PACKET_LIB_ADAPTER_GUID
/* get adapter index for guid string */
adapter_num = get_adapter_index(PACKET_LIB_ADAPTER_GUID);
if (adapter_num < 0) {
printf("ERROR finding network adapter with GUID \"%s\"!\n", PACKET_LIB_ADAPTER_GUID);
LWIP_ASSERT("ERROR initializing network adapter!\n", 0);
return;
}
#endif /* PACKET_LIB_ADAPTER_GUID */
#endif /* PACKET_LIB_GET_ADAPTER_NETADDRESS */
/* Do whatever else is needed to initialize interface. */
if ((netif->state = init_adapter(adapter_num, adapter_mac_addr,
ethernetif_process_input, netif, &linkstate)) == NULL) {
printf("ERROR initializing network adapter %d!\n", PACKET_LIB_ADAPTER_NR);
LWIP_ASSERT("ERROR initializing network adapter!", 0);
return;
}
/* change the MAC address to a unique value
so that multiple ethernetifs are supported */
my_mac_addr[ETHARP_HWADDR_LEN - 1] += netif->num;
/* Copy MAC addr */
memcpy(&netif->hwaddr, my_mac_addr, ETHARP_HWADDR_LEN);
if (linkstate == LINKEVENT_UP) {
netif_set_link_up(netif);
} else {
netif_set_link_down(netif);
}
LWIP_DEBUGF(NETIF_DEBUG, ("pktif: eth_addr %02X%02X%02X%02X%02X%02X\n",netif->hwaddr[0],netif->hwaddr[1],netif->hwaddr[2],netif->hwaddr[3],netif->hwaddr[4],netif->hwaddr[5]));
}
/*-----------------------------------------------------------------------------------*/
/*
* low_level_output():
*
* Should do the actual transmission of the packet. The packet is
* contained in the pbuf that is passed to the function. This pbuf
* might be chained.
*
*/
/*-----------------------------------------------------------------------------------*/
static err_t
low_level_output(struct netif *netif, struct pbuf *p)
{
struct pbuf *q;
unsigned char buffer[1600];
unsigned char *ptr;
struct eth_hdr *ethhdr;
u16_t tot_len = p->tot_len - ETH_PAD_SIZE;
#if defined(LWIP_DEBUG) && LWIP_NETIF_TX_SINGLE_PBUF
LWIP_ASSERT("p->next == NULL && p->len == p->tot_len", p->next == NULL && p->len == p->tot_len);
#endif
/* initiate transfer(); */
if (p->tot_len >= sizeof(buffer)) {
LINK_STATS_INC(link.lenerr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
return ERR_BUF;
}
ptr = buffer;
for(q = p; q != NULL; q = q->next) {
/* Send the data from the pbuf to the interface, one pbuf at a
time. The size of the data in each pbuf is kept in the ->len
variable. */
/* send data from(q->payload, q->len); */
LWIP_DEBUGF(NETIF_DEBUG, ("netif: send ptr %p q->payload %p q->len %i q->next %p\n", ptr, q->payload, (int)q->len, q->next));
if (q == p) {
memcpy(ptr, &((char*)q->payload)[ETH_PAD_SIZE], q->len - ETH_PAD_SIZE);
ptr += q->len - ETH_PAD_SIZE;
} else {
memcpy(ptr, q->payload, q->len);
ptr += q->len;
}
}
/* signal that packet should be sent(); */
if (packet_send(netif->state, buffer, tot_len) < 0) {
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
return ERR_BUF;
}
LINK_STATS_INC(link.xmit);
snmp_add_ifoutoctets(netif, tot_len);
ethhdr = (struct eth_hdr *)p->payload;
if ((ethhdr->dest.addr[0] & 1) != 0) {
/* broadcast or multicast packet*/
snmp_inc_ifoutnucastpkts(netif);
} else {
/* unicast packet */
snmp_inc_ifoutucastpkts(netif);
}
return ERR_OK;
}
/*-----------------------------------------------------------------------------------*/
/*
* low_level_input():
*
* Should allocate a pbuf and transfer the bytes of the incoming
* packet from the interface into the pbuf.
*
*/
/*-----------------------------------------------------------------------------------*/
static struct pbuf *
low_level_input(struct netif *netif, void *packet, int packet_len)
{
struct pbuf *p, *q;
int start;
int length = packet_len;
struct eth_addr *dest = (struct eth_addr*)packet;
struct eth_addr *src = dest + 1;
int unicast;
/* MAC filter: only let my MAC or non-unicast through */
unicast = ((dest->addr[0] & 0x01) == 0);
if (((memcmp(dest, &netif->hwaddr, ETHARP_HWADDR_LEN)) && unicast) ||
/* and don't let feedback packets through (limitation in winpcap?) */
(!memcmp(src, netif->hwaddr, ETHARP_HWADDR_LEN))) {
/* don't update counters here! */
return NULL;
}
/* We allocate a pbuf chain of pbufs from the pool. */
p = pbuf_alloc(PBUF_RAW, (u16_t)length + ETH_PAD_SIZE, PBUF_POOL);
LWIP_DEBUGF(NETIF_DEBUG, ("netif: recv length %i p->tot_len %i\n", length, (int)p->tot_len));
if (p != NULL) {
/* We iterate over the pbuf chain until we have read the entire
packet into the pbuf. */
start=0;
for (q = p; q != NULL; q = q->next) {
u16_t copy_len = q->len;
/* Read enough bytes to fill this pbuf in the chain. The
available data in the pbuf is given by the q->len
variable. */
/* read data into(q->payload, q->len); */
LWIP_DEBUGF(NETIF_DEBUG, ("netif: recv start %i length %i q->payload %p q->len %i q->next %p\n", start, length, q->payload, (int)q->len, q->next));
if (q == p) {
LWIP_ASSERT("q->len >= ETH_PAD_SIZE", q->len >= ETH_PAD_SIZE);
copy_len -= ETH_PAD_SIZE;
memcpy(&((char*)q->payload)[ETH_PAD_SIZE], &((char*)packet)[start], copy_len);
} else {
memcpy(q->payload, &((char*)packet)[start], copy_len);
}
start += copy_len;
length -= copy_len;
if (length <= 0) {
break;
}
}
LINK_STATS_INC(link.recv);
snmp_add_ifinoctets(netif, p->tot_len);
if (unicast) {
snmp_inc_ifinucastpkts(netif);
} else {
snmp_inc_ifinnucastpkts(netif);
}
} else {
/* drop packet(); */
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
}
return p;
}
/*-----------------------------------------------------------------------------------*/
/*
* ethernetif_input():
*
* This function should be called when a packet is ready to be read
* from the interface. It uses the function low_level_input() that
* should handle the actual reception of bytes from the network
* interface.
*
*/
/*-----------------------------------------------------------------------------------*/
static void
ethernetif_input(struct netif *netif, void *packet, int packet_len)
{
struct eth_hdr *ethhdr;
struct pbuf *p;
if (packet_len <= 0) {
return;
}
/* move received packet into a new pbuf */
p = low_level_input(netif, packet, packet_len);
/* no packet could be read, silently ignore this */
if (p == NULL) {
return;
}
/* points to packet payload, which starts with an Ethernet header */
ethhdr = (struct eth_hdr *)p->payload;
switch (htons(ethhdr->type)) {
/* IP or ARP packet? */
case ETHTYPE_IP:
case ETHTYPE_ARP:
#if PPPOE_SUPPORT
/* PPPoE packet? */
case ETHTYPE_PPPOEDISC:
case ETHTYPE_PPPOE:
#endif /* PPPOE_SUPPORT */
/* full packet send to tcpip_thread to process */
if (netif->input(p, netif) != ERR_OK) {
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
pbuf_free(p);
p = NULL;
}
break;
default:
LINK_STATS_INC(link.proterr);
LINK_STATS_INC(link.drop);
pbuf_free(p);
p = NULL;
break;
}
}
/*-----------------------------------------------------------------------------------*/
/*
* ethernetif_init():
*
* Should be called at the beginning of the program to set up the
* network interface. It calls the function low_level_init() to do the
* actual setup of the hardware.
*
*/
/*-----------------------------------------------------------------------------------*/
err_t
ethernetif_init(struct netif *netif)
{
static int ethernetif_index;
int local_index;
SYS_ARCH_DECL_PROTECT(lev);
SYS_ARCH_PROTECT(lev);
local_index = ethernetif_index++;
SYS_ARCH_UNPROTECT(lev);
netif->name[0] = IFNAME0;
netif->name[1] = (char)(IFNAME1 + local_index);
netif->linkoutput = low_level_output;
#if LWIP_ARP
netif->output = etharp_output;
#else /* LWIP_ARP */
netif->output = NULL; /* not used for PPPoE */
#endif /* LWIP_ARP */
#if LWIP_NETIF_HOSTNAME
/* Initialize interface hostname */
netif_set_hostname(netif, "lwip");
#endif /* LWIP_NETIF_HOSTNAME */
netif->mtu = 1500;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_IGMP;
netif->hwaddr_len = ETHARP_HWADDR_LEN;
NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100000000);
/* sets link up or down based on current status */
low_level_init(netif);
return ERR_OK;
}
void
ethernetif_shutdown(struct netif *netif)
{
shutdown_adapter(netif->state);
}
void
ethernetif_poll(struct netif *netif)
{
update_adapter(netif->state);
/* Process the link status change */
switch (link_adapter(netif->state)) {
case LINKEVENT_UP: {
NOTIFY_LINKSTATE(netif,netif_set_link_up);
break;
}
case LINKEVENT_DOWN: {
NOTIFY_LINKSTATE(netif,netif_set_link_down);
break;
}
}
}
/*-----------------------------------------------------------------------------------*/
/*
* pktif_update():
*
* Needs to be called periodically to get new packets. This could
* be done inside a thread.
*/
/*-----------------------------------------------------------------------------------*/
void
ethernetif_process_input(void *arg, void *packet, int packet_len)
{
struct netif *netif = (struct netif*)arg;
ethernetif_input(netif, packet, packet_len);
}
#endif /* LWIP_ETHERNET */