Squashed 'lib/lwip/lwip/' content from commit 0a0452b2c39b

git-subtree-dir: lib/lwip/lwip
git-subtree-split: 0a0452b2c39bdd91e252aef045c115f88f6ca773

1 files changed, 207 insertions, 0 deletions

diff --git a/contrib/ports/unix/port/netif/pcapif.c b/contrib/ports/unix/port/netif/pcapif.c
new file mode 100644
index 00000000000..2851c8227f9
--- /dev/null
+++ b/contrib/ports/unix/port/netif/pcapif.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2001-2003 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef linux  /* Apparently, this doesn't work under Linux. */
+
+#include "lwip/debug.h"
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <pcap.h>
+
+#include "netif/etharp.h"
+
+#include "lwip/stats.h"
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+
+#include "lwip/ip.h"
+
+
+struct pcapif {
+  pcap_t *pd;
+  sys_sem_t sem;
+  u8_t pkt[2048];
+  u32_t len;
+  u32_t lasttime;
+  struct pbuf *p;
+  struct eth_addr *ethaddr;
+};
+
+static char errbuf[PCAP_ERRBUF_SIZE];
+
+/*-----------------------------------------------------------------------------------*/
+static err_t
+pcapif_output(struct netif *netif, struct pbuf *p,
+	      ip_addr_t *ipaddr)
+{
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+timeout(void *arg)
+{
+  struct netif *netif;
+  struct pcapif *pcapif;
+  struct pbuf *p;
+  struct eth_hdr *ethhdr;
+
+  netif = (struct netif *)arg;
+  pcapif = netif->state;
+  ethhdr = (struct eth_hdr *)pcapif->pkt;
+
+
+  if (lwip_htons(ethhdr->type) != ETHTYPE_IP ||
+     ip_lookup(pcapif->pkt + 14, netif)) {
+
+    /* We allocate a pbuf chain of pbufs from the pool. */
+    p = pbuf_alloc(PBUF_LINK, pcapif->len, PBUF_POOL);
+
+    if (p != NULL) {
+      pbuf_take(p, pcapif->pkt, pcapif->len);
+
+      ethhdr = p->payload;
+      switch (lwip_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:
+        pbuf_free(p);
+        break;
+      }
+    }
+  } else {
+    printf("ip_lookup dropped\n");
+  }
+
+  sys_sem_signal(&pcapif->sem);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+callback(u_char *arg, const struct pcap_pkthdr *hdr, const u_char *pkt)
+{
+  struct netif *netif;
+  struct pcapif *pcapif;
+  u32_t time, lasttime;
+
+  netif = (struct netif *)arg;
+  pcapif = netif->state;
+
+  pcapif->len = hdr->len;
+
+  bcopy(pkt, pcapif->pkt, hdr->len);
+
+  time = hdr->ts.tv_sec * 1000 + hdr->ts.tv_usec / 1000;
+
+  lasttime = pcapif->lasttime;
+  pcapif->lasttime = time;
+
+
+  if (lasttime == 0) {
+    sys_timeout(1000, timeout, netif);
+  } else {
+    sys_timeout(time - lasttime, timeout, netif);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+pcapif_thread(void *arg)
+{
+  struct netif *netif;
+  struct pcapif *pcapif;
+  netif = arg;
+  pcapif = netif->state;
+
+  while (1) {
+    pcap_loop(pcapif->pd, 1, callback, (u_char *)netif);
+    sys_sem_wait(&pcapif->sem);
+    if (pcapif->p != NULL) {
+      netif->input(pcapif->p, netif);
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+err_t
+pcapif_init(struct netif *netif)
+{
+  struct pcapif *p;
+
+  p = malloc(sizeof(struct pcapif));
+  if (p == NULL)
+      return ERR_MEM;
+  netif->state = p;
+  netif->name[0] = 'p';
+  netif->name[1] = 'c';
+  netif->output = pcapif_output;
+
+  p->pd = pcap_open_offline("pcapdump", errbuf);
+  if (p->pd == NULL) {
+    printf("pcapif_init: failed %s\n", errbuf);
+    return ERR_IF;
+  }
+
+  if(sys_sem_new(&p->sem, 0) != ERR_OK) {
+    LWIP_ASSERT("Failed to create semaphore", 0);
+  }
+  p->p = NULL;
+  p->lasttime = 0;
+
+  sys_thread_new("pcapif_thread", pcapif_thread, netif, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+#endif /* linux */