[lwip-devel] [bug #20253] "p->payload == iphdr" assertion in udp.c

[Petr Cernin]

URL:
  <http://savannah.nongnu.org/bugs/?20253>

                 Summary: "p->payload == iphdr" assertion in udp.c
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: cerninp
            Submitted on: Monday 06/25/07 at 15:42
                Category: UDP
                Severity: 3 - Normal
              Item Group: Crash Error
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

This assertion appears every time when udp message is received and
destination port is unreachable. There is a little bug in udp.c:

line 259 (udp.c):
  pbuf_header(p, (IPH_HL(iphdr) * 4));
  LWIP_ASSERT("p->payload == iphdr", (p->payload == iphdr));

there should be:
  pbuf_header(p, (IPH_HL(iphdr) * 4) + UDP_HLEN);
  LWIP_ASSERT("p->payload == iphdr", (p->payload == iphdr));




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