buglwIP - A Lightweight TCP/IP stack - Bugs: bug #61590, DNS Servers Limit when...


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bug #61590: DNS Servers Limit when DNS_MAX_SERVERS > LWIP_DHCP_MAX_DNS_SERVERS

Submitter:  Corentin <corentin>
Submitted:  Tue 30 Nov 2021 03:59:58 PM UTC
Category:  DHCP Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
lwIP version:  git head

Fri 10 Dec 2021 10:26:09 AM UTC, comment #1: 
Borys Szefler <bsz>
Tue 30 Nov 2021 03:59:58 PM UTC, original submission:  

When DNS_MAX_SERVERS > LWIP_DHCP_MAX_DNS_SERVERS, the limit number of DNS servers provided by decode_len in function dhcp_parse_reply is set by DNS_MAX_SERVERS.

this generate an LWIP_ASSERT (decode_idx < DHCP_OPTION_IDX_MAX) when DHCP send much than LWIP_DHCP_MAX_DNS_SERVERS.

See watched a patch that sound fix this issue.

Corentin <corentin>


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Attached Files
file #52390:  dhcp_dns.patch added by corentin (709B - application/octet-stream)


Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by bsz (Posted a comment)
  • -email is unavailable- added by corentin (Submitted the item)

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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2021-11-30 corentin Attached File- Added dhcp_dns.patch, #52390

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