[lwip-users] etharp_output: could not allocate room for header.

[Thanh NGUYEN]

Hi all,

I'm trying compile an little application with lwip inside ecos. Here is 
the trace of my program:

udp_send: added header pbuf 0x20174fd4 before given pbuf 0x20176ad4
udp_send: sending datagram of length 55
udp_send: UDP packet length 55
udp_send: UDP checksum 0x3bd5
udp_send: ip_output_if (,,,,IP_PROTO_UDP,)
pbuf_header: old 0x20175008 new 0x20174ff4 (20)
ip_output_if: et1
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        75     | (v, hl, tos, len)
+-------------------------------+
|        0      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |   17  |    0x5657     | (ttl, proto, chksum)
+-------------------------------+
|  172  |   16  |    6  |   43  | (src)
+-------------------------------+
|  172  |   16  |    6  |  255  | (dest)
+-------------------------------+
netif->output()etharp_output: could not allocate room for header.

After that, the application crashed. Anyone knows why ?


Thanks for your helps.

NT