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Fix problem with ping that prevent ping from going outside local network (Darcy Gong)

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5204 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2012-09-29 14:13:04 +00:00
parent cb93a6a1b4
commit 0663694745
7 changed files with 145 additions and 120 deletions
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net/uip/uip_icmpping.c
+84 -77
View File
@@ -148,122 +148,129 @@ static inline int ping_timeout(struct icmp_ping_s *pstate)
****************************************************************************/
static uint16_t ping_interrupt(struct uip_driver_s *dev, void *conn,
void *pvpriv, uint16_t flags)
void *pvpriv, uint16_t flags)
{
struct icmp_ping_s *pstate = (struct icmp_ping_s *)pvpriv;
uint8_t *ptr;
int failcode = -ETIMEDOUT;
int i;
nllvdbg("flags: %04x\n", flags);
if (pstate)
{
/* Check if this device is on the same network as the destination device. */
/* Check if this is a ICMP ECHO reply. If so, return the sequence
* number to the caller. NOTE: We may not even have sent the
* requested ECHO request; this could have been the delayed ECHO
* response from a previous ping.
*/
if (!uip_ipaddr_maskcmp(pstate->png_addr, dev->d_ipaddr, dev->d_netmask))
if ((flags & UIP_ECHOREPLY) != 0 && conn != NULL)
{
/* Destination address was not on the local network served by this
* device. If a timeout occurs, then the most likely reason is
* that the destination address is not reachable.
*/
struct uip_icmpip_hdr *icmp = (struct uip_icmpip_hdr *)conn;
nlldbg("ECHO reply: id=%d seqno=%d\n",
ntohs(icmp->id), ntohs(icmp->seqno));
nllvdbg("Not reachable\n");
failcode = -ENETUNREACH;
}
else
{
/* Check if this is a ICMP ECHO reply. If so, return the sequence
* number to the caller. NOTE: We may not even have sent the
* requested ECHO request; this could have been the delayed ECHO
* response from a previous ping.
*/
if ((flags & UIP_ECHOREPLY) != 0 && conn != NULL)
if (ntohs(icmp->id) == pstate->png_id)
{
struct uip_icmpip_hdr *icmp = (struct uip_icmpip_hdr *)conn;
nlldbg("ECHO reply: id=%d seqno=%d\n", ntohs(icmp->id), ntohs(icmp->seqno));
/* Consume the ECHOREPLY */
if (ntohs(icmp->id) == pstate->png_id)
{
/* Consume the ECHOREPLY */
flags &= ~UIP_ECHOREPLY;
dev->d_len = 0;
flags &= ~UIP_ECHOREPLY;
dev->d_len = 0;
/* Return the result to the caller */
/* Return the result to the caller */
pstate->png_result = OK;
pstate->png_seqno = ntohs(icmp->seqno);
goto end_wait;
}
pstate->png_result = OK;
pstate->png_seqno = ntohs(icmp->seqno);
goto end_wait;
}
}
/* Check:
* If the outgoing packet is available (it may have been claimed
* by a sendto interrupt serving a different thread
* -OR-
* If the output buffer currently contains unprocessed incoming
* data.
* -OR-
* If we have alread sent the ECHO request
/* Check:
* If the outgoing packet is available (it may have been claimed
* by a sendto interrupt serving a different thread)
* -OR-
* If the output buffer currently contains unprocessed incoming
* data.
* -OR-
* If we have alread sent the ECHO request
*
* In the first two cases, we will just have to wait for the next
* polling cycle.
*/
if (dev->d_sndlen <= 0 && /* Packet available */
(flags & UIP_NEWDATA) == 0 && /* No incoming data */
!pstate->png_sent) /* Request not sent */
{
struct uip_icmpip_hdr *picmp = ICMPBUF;
/* We can send the ECHO request now.
*
* In the first two cases, we will just have to wait for the next
* polling cycle.
* Format the ICMP ECHO request packet
*/
if (dev->d_sndlen <= 0 && /* Packet available */
(flags & UIP_NEWDATA) == 0 && /* No incoming data */
!pstate->png_sent) /* Request not sent */
{
struct uip_icmpip_hdr *picmp = ICMPBUF;
/* We can send the ECHO request now.
*
* Format the ICMP ECHO request packet
*/
picmp->type = ICMP_ECHO_REQUEST;
picmp->icode = 0;
picmp->type = ICMP_ECHO_REQUEST;
picmp->icode = 0;
#ifndef CONFIG_NET_IPv6
picmp->id = htons(pstate->png_id);
picmp->seqno = htons(pstate->png_seqno);
picmp->id = htons(pstate->png_id);
picmp->seqno = htons(pstate->png_seqno);
#else
# error "IPv6 ECHO Request not implemented"
#endif
/* Add some easily verifiable data */
/* Add some easily verifiable data */
for (i = 0, ptr = ICMPDAT; i < pstate->png_datlen; i++)
{
*ptr++ = i;
}
/* Send the ICMP echo request. Note that d_sndlen is set to
* the size of the ICMP payload and does not include the size
* of the ICMP header.
*/
nlldbg("Send ECHO request: seqno=%d\n", pstate->png_seqno);
dev->d_sndlen = pstate->png_datlen + 4;
uip_icmpsend(dev, &pstate->png_addr);
pstate->png_sent = true;
return flags;
for (i = 0, ptr = ICMPDAT; i < pstate->png_datlen; i++)
{
*ptr++ = i;
}
/* Send the ICMP echo request. Note that d_sndlen is set to
* the size of the ICMP payload and does not include the size
* of the ICMP header.
*/
nlldbg("Send ECHO request: seqno=%d\n", pstate->png_seqno);
dev->d_sndlen = pstate->png_datlen + 4;
uip_icmpsend(dev, &pstate->png_addr);
pstate->png_sent = true;
return flags;
}
/* Check if the selected timeout has elapsed */
if (ping_timeout(pstate))
{
/* Yes.. report the timeout */
int failcode;
/* Check if this device is on the same network as the destination
* device.
*/
if (!uip_ipaddr_maskcmp(pstate->png_addr, dev->d_ipaddr, dev->d_netmask))
{
/* Destination address was not on the local network served by this
* device. If a timeout occurs, then the most likely reason is
* that the destination address is not reachable.
*/
nlldbg("Not reachable\n");
failcode = -ENETUNREACH;
}
else
{
nlldbg("Ping timeout\n");
failcode = -ETIMEDOUT;
}
/* Report the failure */
nlldbg("Ping timeout\n");
pstate->png_result = failcode;
goto end_wait;
}
/* Continue waiting */
}
return flags;
end_wait: