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[lwip-devel] [bug #64909] No memory pool MEMP_SYS_TIMEOUT allocation for
From: |
Richard Lang |
Subject: |
[lwip-devel] [bug #64909] No memory pool MEMP_SYS_TIMEOUT allocation for SNTP timer |
Date: |
Sun, 19 Nov 2023 15:53:43 -0500 (EST) |
URL:
<https://savannah.nongnu.org/bugs/?64909>
Summary: No memory pool MEMP_SYS_TIMEOUT allocation for SNTP
timer
Group: lwIP - A Lightweight TCP/IP stack
Submitter: richardlang
Submitted: Sun 19 Nov 2023 08:53:41 PM UTC
Category: None
Severity: 3 - Normal
Item Group: Crash Error
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Planned Release: None
lwIP version: 2.1.3
_______________________________________________________
Follow-up Comments:
-------------------------------------------------------
Date: Sun 19 Nov 2023 08:53:41 PM UTC By: Richard Lang <richardlang>
Configured LWIP with pretty much default options apart from TCP/IP and sockets
API disabled (UDP enabled, no DNS, DHCP etc). Under these circumstances the
LWIP_NUM_SYS_TIMEOUT_INTERNAL declaration in "./src/include/lwip/opt.h"
evaluates to 2.
On trying to initialise the SNTP module with sntp_init() call, the
sys_timeout() call within sntp_send_request() fails to find an available
memory pool entry in MEMP_SYS_TIMEOUT pool and returns a NULL pointer,
triggering the subsequent LWIP_ASSERT() statement.
looking at "opt.h"
#define LWIP_NUM_SYS_TIMEOUT_INTERNAL (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP
+ (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS + PPP_NUM_TIMEOUTS +
(LWIP_IPV6 * (1 + LWIP_IPV6_REASS + LWIP_IPV6_MLD)))
there doesn't seem to be any allowance for the SNTP timer. SNTP support is
conditionally included based on LWIP_UDP so I'd expect the above declaration
should be
#define LWIP_NUM_SYS_TIMEOUT_INTERNAL (LWIP_TCP + LWIP_UDP + IP_REASSEMBLY
+ LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS +
PPP_NUM_TIMEOUTS + (LWIP_IPV6 * (1 + LWIP_IPV6_REASS + LWIP_IPV6_MLD)))
Encountered on 2.1.3 branch, but examination of declaration in master looks to
me as though problem still exists.
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