[lwip-users] What's wrong according to logs

[zhou yi]

Dear all:

    I port LwIP 1.1.1 to at91sam7x256 with rtl8201 phy, and write a modbus tcp procotol, now I test my modbus tcp procotol, the system run for about 30 minutes, the log will like this:

Assertion "pbuf_free: p->ref > 0" failed at line 574 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "mem_free: legal memory" failed at line 149 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\mem.c
Assertion "p->next != NULL" failed at line 790 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "p->len < p->tot_len" failed at line 788 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "p->len < p->tot_len" failed at line 788 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "p->next != NULL" failed at line 790 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
lwip_send(0, data="" size=12, flags=0x0)
lwip_send(0) ok size=12
TCP Sent"00 94 00 00 00 06 01 03 00 00 00 32
lwip_recvfrom(0, 0000d3e9, 8, 0x0, ..)
Assertion "pbuf_free: sane flags" failed at line 561 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "pbuf_free: p->ref > 0" failed at line 574 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "pbuf_free: p->ref > 0" failed at line 574 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "mem_free: legal memory" failed at line 149 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\mem.c
Assertion "p->next != NULL" failed at line 790 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "p->len < p->tot_len" failed at line 788 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "p->len < p->tot_len" failed at line 788 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "p->next != NULL" failed at line 790 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
Assertion "pbuf_free: sane flags" failed at line 561 in E:\work\7x256.200807251944\7x256\src\LwIP\src\core\pbuf.c
lwip_recvfrom(0): buf == NULL!
   But I only use static memory which is allocated by predefined array, like unsigned char gszMbAduData[DC_MB_ASCII_ADU_LENGTH]. What is the problem? Thanks.