[lwip-devel] [bug #34475] raw_sendto() doesn't rewind headers in pbuf on return

[Mike Kleshov]

URL:
  <http://savannah.nongnu.org/bugs/?34475>

                 Summary: raw_sendto() doesn't rewind headers in pbuf on
return
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: kleshov
            Submitted on: Втр 04 Окт 2011 18:38:17
                Category: IPv4
                Severity: 2 - Minor
              Item Group: Change Request
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.4.0

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Details:

I am using raw_sendto() to ping a remote host. The code is based on the ping
application from contrib. When I try to send the same pbuf a second time
(retry a ping), wrong data is sent. This happens because the first call to
raw_sendto() calls pbuf_header() on the pbuf and never adjust the payload
pointer back. I think this is wrong behaviour.
As a workaround, I am allocating the pbuf with the PBUF_RAW option, so
raw_sendto() allocates a new pbuf for the header.




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