306 lines
7.5 KiB
C
306 lines
7.5 KiB
C
/*
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* File : pcap_netif.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2012, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2012-11-05 Bernard the first version
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* 2012-11-13 Bernard merge prife's patch for exclusive
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* access pcap driver.
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*/
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#ifdef _TIME_T_DEFINED
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#undef _TIME_T_DEFINED
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#endif
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#ifdef _MSC_VER
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/*
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* we do not want the warnings about the old deprecated and unsecure CRT functions
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* since these examples can be compiled under *nix as well
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*/
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#include <pcap.h>
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#include <rtthread.h>
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#include <netif/ethernetif.h>
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#define MAX_ADDR_LEN 6
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#define NETIF_DEVICE(netif) ((struct pcap_netif*)(netif))
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#define NETIF_PCAP(netif) (NETIF_DEVICE(netif)->tap)
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struct pcap_netif
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{
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/* inherit from ethernet device */
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struct eth_device parent;
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pcap_t *tap;
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/* interface address info. */
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rt_uint8_t dev_addr[MAX_ADDR_LEN]; /* hw address */
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};
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static struct pcap_netif pcap_netif_device;
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static struct rt_semaphore sem_lock;
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static rt_mailbox_t packet_mb = RT_NULL;
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static void pcap_thread_entry(void* parameter)
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{
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pcap_if_t *netif;
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pcap_t *tap;
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char errbuf[PCAP_ERRBUF_SIZE];
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struct pcap_pkthdr *header;
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const u_char *pkt_data;
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int res;
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netif = (pcap_if_t *) parameter;
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/* Open the adapter */
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if ((tap = pcap_open_live(netif->name,
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65536, // portion of the packet to capture.
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1, // promiscuous mode (nonzero means promiscuous)
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1, // read timeout, 0 blocked, -1 no timeout
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errbuf )) == NULL)
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{
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rt_kprintf("Unable to open the adapter. %s is not supported by WinPcap\n", netif->name);
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return;
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}
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NETIF_PCAP(&pcap_netif_device) = tap;
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/* Read the packets */
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while (1)
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{
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struct eth_device* eth;
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struct pbuf *p;
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rt_enter_critical();
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res = pcap_next_ex(tap, &header, &pkt_data);
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rt_exit_critical();
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if (res == 0) continue;
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eth = (struct eth_device*) &pcap_netif_device;
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p = pbuf_alloc(PBUF_LINK, header->len, PBUF_RAM);
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pbuf_take(p, pkt_data, header->len);
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/* send to packet mailbox */
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rt_mb_send_wait(packet_mb, (rt_uint32_t)p, RT_WAITING_FOREVER);
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/* notify eth rx thread to receive packet */
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eth_device_ready(eth);
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}
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}
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static rt_err_t pcap_netif_init(rt_device_t dev)
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{
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rt_thread_t tid;
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pcap_if_t *alldevs;
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pcap_if_t *d;
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pcap_t *tap;
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int inum, i=0;
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char errbuf[PCAP_ERRBUF_SIZE];
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/* Retrieve the device list */
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if(pcap_findalldevs(&alldevs, errbuf) == -1)
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{
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rt_kprintf("Error in pcap_findalldevs: %s\n", errbuf);
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return -RT_ERROR;
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}
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/* Print the list */
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for(d = alldevs; d; d = d->next)
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{
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rt_kprintf("%d. %s", ++i, d->name);
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if (d->description)
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rt_kprintf(" (%s)\n", d->description);
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else
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rt_kprintf(" (No description available)\n");
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}
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if(i == 0)
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{
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rt_kprintf("\nNo interfaces found! Make sure WinPcap is installed.\n");
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return -RT_ERROR;
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}
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inum = 1;
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/* Jump to the selected adapter */
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for(d = alldevs, i = 0; i < inum-1 ;d = d->next, i++);
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{
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rt_kprintf("Select (%s) as network interface\n", d->description);
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packet_mb = rt_mb_create("pcap", 64, RT_IPC_FLAG_FIFO);
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tid = rt_thread_create("pcap", pcap_thread_entry, d,
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2048, RT_THREAD_PRIORITY_MAX - 1, 10);
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if (tid != RT_NULL)
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{
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rt_thread_startup(tid);
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}
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rt_thread_delay(100);
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}
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pcap_freealldevs(alldevs);
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return RT_EOK;
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}
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static rt_err_t pcap_netif_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_err_t pcap_netif_close(rt_device_t dev)
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{
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pcap_t *tap;
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tap = NETIF_PCAP(dev);
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pcap_close(tap);
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return RT_EOK;
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}
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static rt_size_t pcap_netif_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
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{
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rt_set_errno(-RT_ENOSYS);
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return 0;
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}
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static rt_size_t pcap_netif_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
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{
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rt_set_errno(-RT_ENOSYS);
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return 0;
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}
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static rt_err_t pcap_netif_control(rt_device_t dev, rt_uint8_t cmd, void *args)
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{
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switch (cmd)
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{
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case NIOCTL_GADDR:
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/* get mac address */
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if (args) rt_memcpy(args, pcap_netif_device.dev_addr, 6);
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else return -RT_ERROR;
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break;
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default :
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break;
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}
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return RT_EOK;
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}
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rt_err_t pcap_netif_tx( rt_device_t dev, struct pbuf* p)
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{
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struct pbuf *q;
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rt_uint8_t *ptr;
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rt_uint8_t buf[2048];
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rt_err_t result = RT_EOK;
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pcap_t *tap;
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int res;
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tap = NETIF_PCAP(dev);
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/* lock EMAC device */
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rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
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/* copy data to tx buffer */
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q = p;
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ptr = (rt_uint8_t*)buf;
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while (q)
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{
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memcpy(ptr, q->payload, q->len);
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ptr += q->len;
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q = q->next;
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}
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rt_enter_critical();
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res = pcap_sendpacket(tap, buf, p->tot_len);
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rt_exit_critical();
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if (res != 0)
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{
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rt_kprintf("Error sending the packet: \n", pcap_geterr(tap));
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result = -RT_ERROR;
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}
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/* unlock EMAC device */
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rt_sem_release(&sem_lock);
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return result;
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}
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struct pbuf *pcap_netif_rx(rt_device_t dev)
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{
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struct pbuf* p = RT_NULL;
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rt_mb_recv(packet_mb, (rt_uint32_t*)&p, 0);
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return p;
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}
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void pcap_netif_hw_init(void)
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{
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rt_sem_init(&sem_lock, "eth_lock", 1, RT_IPC_FLAG_FIFO);
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pcap_netif_device.dev_addr[0] = 0x00;
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pcap_netif_device.dev_addr[1] = 0x60;
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pcap_netif_device.dev_addr[2] = 0x37;
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/* set mac address: (only for test) */
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pcap_netif_device.dev_addr[3] = 0x12;
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pcap_netif_device.dev_addr[4] = 0x34;
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pcap_netif_device.dev_addr[5] = 0x56;
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pcap_netif_device.parent.parent.init = pcap_netif_init;
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pcap_netif_device.parent.parent.open = pcap_netif_open;
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pcap_netif_device.parent.parent.close = pcap_netif_close;
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pcap_netif_device.parent.parent.read = pcap_netif_read;
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pcap_netif_device.parent.parent.write = pcap_netif_write;
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pcap_netif_device.parent.parent.control = pcap_netif_control;
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pcap_netif_device.parent.parent.user_data = RT_NULL;
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pcap_netif_device.parent.eth_rx = pcap_netif_rx;
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pcap_netif_device.parent.eth_tx = pcap_netif_tx;
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eth_device_init(&(pcap_netif_device.parent), "e0");
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}
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#include <finsh.h>
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void list_pcap(void)
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{
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int i=0;
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pcap_if_t *alldevs;
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pcap_if_t *d;
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char errbuf[PCAP_ERRBUF_SIZE];
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/* Retrieve the device list */
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if(pcap_findalldevs(&alldevs, errbuf) == -1)
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{
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rt_kprintf("Error in pcap_findalldevs: %s\n", errbuf);
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return -RT_ERROR;
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}
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/* Print the list */
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for(d = alldevs; d; d = d->next)
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{
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rt_kprintf("%d. %s", ++i, d->name);
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if (d->description)
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rt_kprintf(" (%s)\n", d->description);
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else
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rt_kprintf(" (No description available)\n");
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}
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if(i == 0)
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{
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rt_kprintf("\nNo interfaces found! Make sure WinPcap is installed.\n");
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return -RT_ERROR;
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}
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pcap_freealldevs(alldevs);
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return ;
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}
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FINSH_FUNCTION_EXPORT(list_pcap, show host netif adapter);
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