X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=geekos%2Fsrc%2Flwip%2Fapps%2Fping.c;fp=geekos%2Fsrc%2Flwip%2Fapps%2Fping.c;h=895b4ffc844a23eae33083847562c281a125ed09;hp=0000000000000000000000000000000000000000;hb=ddc16b0737cf58f7aa90a69c6652cdf4090aec51;hpb=626595465a2c6987606a6bc697df65130ad8c2d3

diff --git a/geekos/src/lwip/apps/ping.c b/geekos/src/lwip/apps/ping.c
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+/**
+ * @file
+ * Ping sender module
+ *
+ */
+
+/*
+ * 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.
+ * 
+ */
+
+/** 
+ * This is an example of a "ping" sender (with raw API and socket API).
+ * It can be used as a start point to maintain opened a network connection, or
+ * like a network "watchdog" for your device.
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_RAW && LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/mem.h"
+#include "lwip/raw.h"
+#include "lwip/icmp.h"
+#include "lwip/netif.h"
+#include "lwip/sys.h"
+#include "lwip/sockets.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+
+#include "apps/ping.h"
+
+#include <geekos/timer.h>
+#include <geekos/ktypes.h>
+
+/**
+ * PING_DEBUG: Enable debugging for PING.
+ */
+#ifndef PING_DEBUG
+#define PING_DEBUG     LWIP_DBG_ON
+#endif
+
+/** ping target - should be a "struct ip_addr" */
+#ifndef PING_TARGET
+#define PING_TARGET   (netif_default?netif_default->gw:ip_addr_any)
+#endif
+
+/** ping receive timeout - in milliseconds */
+#ifndef PING_RCV_TIMEO
+#define PING_RCV_TIMEO 1000
+#endif
+
+/** ping delay - in milliseconds */
+#ifndef PING_DELAY
+#define PING_DELAY     1000
+#endif
+
+/** ping identifier - must fit on a u16_t */
+#ifndef PING_ID
+#define PING_ID        0xAFAF
+#endif
+
+/** ping additional data size to include in the packet */
+#ifndef PING_DATA_SIZE
+#define PING_DATA_SIZE 32
+#endif
+
+/** ping result action - no default action */
+#ifndef PING_RESULT
+#define PING_RESULT(ping_ok)
+#endif
+
+/* ping variables */
+static u16_t ping_seq_num;
+static u32_t ping_time;
+
+#if NO_SYS
+/* port-defined functions used for timer execution */
+void sys_msleep(u32_t ms);
+u32_t sys_now();
+#endif /* NO_SYS */
+
+/** Prepare a echo ICMP request */
+static void
+ping_prepare_echo( struct icmp_echo_hdr *iecho, u16_t len)
+{
+  int i;
+
+  ICMPH_TYPE_SET(iecho,ICMP_ECHO);
+  ICMPH_CODE_SET(iecho, 0);
+  iecho->chksum = 0;
+  iecho->id     = PING_ID;
+  iecho->seqno  = htons(++ping_seq_num);
+  iecho->chksum = inet_chksum(iecho, len);
+
+  /* fill the additional data buffer with some data */
+  for(i = 0; i < PING_DATA_SIZE; i++) {
+    ((char*)iecho)[sizeof(struct icmp_echo_hdr) + i] = i;
+  }
+}
+
+#if LWIP_SOCKET
+
+/* Ping using the socket ip */
+static err_t
+ping_send(int s, struct ip_addr *addr)
+{
+  int err;
+  struct icmp_echo_hdr *iecho;
+  struct sockaddr_in to;
+  size_t ping_size = sizeof(struct icmp_echo_hdr) + PING_DATA_SIZE;
+
+  if (!(iecho = mem_malloc(ping_size))) {
+    return ERR_MEM;
+  }
+
+  ping_prepare_echo(iecho, ping_size);
+
+  to.sin_len = sizeof(to);
+  to.sin_family = AF_INET;
+  to.sin_addr.s_addr = addr->addr;
+
+  err = lwip_sendto(s, iecho, ping_size, 0, (struct sockaddr*)&to, sizeof(to));
+
+  mem_free(iecho);
+
+  return (err ? ERR_OK : ERR_VAL);
+}
+
+static void
+ping_recv(int s)
+{
+  char buf[64];
+  int fromlen, len;
+  struct sockaddr_in from;
+  struct ip_hdr *iphdr;
+  struct icmp_echo_hdr *iecho;
+
+  while((len = lwip_recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr*)&from, (socklen_t*)&fromlen)) > 0) {
+    if (len >= (sizeof(struct ip_hdr)+sizeof(struct icmp_echo_hdr))) {
+      LWIP_DEBUGF( PING_DEBUG, ("ping: recv "));
+      ip_addr_debug_print(PING_DEBUG, (struct ip_addr *)&(from.sin_addr));
+      LWIP_DEBUGF( PING_DEBUG, (" %lu ms\n", (sys_now()-ping_time)));
+
+      iphdr = (struct ip_hdr *)buf;
+      iecho = (struct icmp_echo_hdr *)(buf+(IPH_HL(iphdr) * 4));
+      if ((iecho->id == PING_ID) && (iecho->seqno == htons(ping_seq_num))) {
+        /* do some ping result processing */
+        PING_RESULT((ICMPH_TYPE(iecho) == ICMP_ER));
+        return;
+      } else {
+        LWIP_DEBUGF( PING_DEBUG, ("ping: drop\n"));
+      }
+    }
+  }
+
+  if (len == 0) {
+    LWIP_DEBUGF( PING_DEBUG, ("ping: recv - %lu ms - timeout\n", (sys_now()-ping_time)));
+  }
+
+  /* do some ping result processing */
+  PING_RESULT(0);
+}
+
+static void
+ping_thread(void *arg)
+{
+  int s;
+  int timeout = PING_RCV_TIMEO;
+  struct ip_addr ping_target;
+
+  LWIP_UNUSED_ARG(arg);
+
+  if ((s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP)) < 0) {
+    return;
+  }
+
+  lwip_setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
+
+  while (1) {
+    ping_target = PING_TARGET;
+
+    if (ping_send(s, &ping_target) == ERR_OK) {
+      LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
+      ip_addr_debug_print(PING_DEBUG, &ping_target);
+      LWIP_DEBUGF( PING_DEBUG, ("\n"));
+
+      ping_time = sys_now();
+      ping_recv(s);
+    } else {
+      LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
+      ip_addr_debug_print(PING_DEBUG, &ping_target);
+      LWIP_DEBUGF( PING_DEBUG, (" - error\n"));
+    }
+    sys_msleep(PING_DELAY);
+  }
+}
+
+#else /* LWIP_SOCKET */
+
+/* Ping using the raw ip */
+static u8_t
+ping_recv(void *arg, struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *addr)
+{
+  struct icmp_echo_hdr *iecho;
+
+  if (pbuf_header( p, -PBUF_IP_HLEN)==0) {
+    iecho = p->payload;
+
+    if ((iecho->id == PING_ID) && (iecho->seqno == htons(ping_seq_num))) {
+      LWIP_DEBUGF( PING_DEBUG, ("ping: recv "));
+      ip_addr_debug_print(PING_DEBUG, addr);
+      LWIP_DEBUGF( PING_DEBUG, (" %lu ms\n", (sys_now()-ping_time)));
+
+      /* do some ping result processing */
+      PING_RESULT(1);
+    }
+  }
+
+  return 1; /* eat the event */
+}
+
+static void
+ping_send(struct raw_pcb *raw, struct ip_addr *addr)
+{
+  struct pbuf *p;
+  struct icmp_echo_hdr *iecho;
+  size_t ping_size = sizeof(struct icmp_echo_hdr) + PING_DATA_SIZE;
+
+  if (!(p = pbuf_alloc(PBUF_IP, ping_size, PBUF_RAM))) {
+    return;
+  }
+  if ((p->len == p->tot_len) && (p->next == NULL)) {
+    iecho = p->payload;
+
+    ping_prepare_echo(iecho, ping_size);
+
+    raw_sendto(raw, p, addr);
+    ping_time = sys_now();
+  }
+  pbuf_free(p);
+}
+
+static void
+ping_timeout(void *arg)
+{
+  struct raw_pcb *pcb = (struct raw_pcb*)arg;
+  struct ip_addr ping_target = PING_TARGET;
+  
+  LWIP_ASSERT("ping_timeout: no pcb given!", pcb != NULL);
+
+  LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
+  ip_addr_debug_print(PING_DEBUG, &ping_target);
+  LWIP_DEBUGF( PING_DEBUG, ("\n"));
+
+  ping_send(pcb, &ping_target);
+
+  sys_timeout(PING_DELAY, ping_timeout, pcb);
+}
+
+static void
+ping_raw_init(void)
+{
+  struct raw_pcb *pcb;
+
+  if (!(pcb = raw_new(IP_PROTO_ICMP))) {
+    return;
+  }
+
+  raw_recv(pcb, ping_recv, NULL);
+  raw_bind(pcb, IP_ADDR_ANY);
+  sys_timeout(PING_DELAY, ping_timeout, pcb);
+}
+
+#endif /* LWIP_SOCKET */
+
+void
+ping_init(void)
+{
+#if LWIP_SOCKET
+  sys_thread_new("ping_thread", ping_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
+#else /* LWIP_SOCKET */
+  ping_raw_init();
+#endif /* LWIP_SOCKET */
+}
+
+
+u32_t
+sys_now()
+{
+  ulong_t msec;
+
+  msec = clock_time();
+    
+  return msec;
+}
+
+#endif /* LWIP_RAW && LWIP_ICMP */