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Jacob Dahl 08961fae95 fix(net/igmp): restore General Query handling broken by pointer compare
The group address in the IGMP header is declared as uint16_t grpaddr[2],
so it decays to a pointer.  Comparing it against INADDR_ANY compares the
address of a struct member against 0, which is always false.  The General
Query branch is therefore unreachable and GCC discards it entirely.

Commit 09bb292fa2 ("net/igmp: fix build warning on GCC 12.2.0") replaced
the original

    if (igmp->grpaddr == 0)

with

    if (net_ipv4addr_cmp(igmp->grpaddr, INADDR_ANY) != 0)

but net_ipv4addr_cmp(a, b) expands to (a == b) and INADDR_ANY expands to
((in_addr_t)0), so the emitted comparison is unchanged.  The -Waddress
diagnostic disappeared only because the comparison now originates inside
a macro expanded from a header included via -isystem, and GCC suppresses
warnings from system-header macros.  The defect was hidden, not fixed.

That commit also rewrote the unicast query test from group->grpaddr != 0,
which was well-formed, into the same pointer comparison, making it
unconditionally true.

Convert the header field with net_ip4addr_conv32() once, and compare the
resulting in_addr_t.  The conversion was already being done in the
group-specific branch, so this only hoists it and reuses it.

Impact: a General Query (destination 224.0.0.1, group address 0) is the
periodic query every IGMP querier sends.  It currently falls through to
the group-specific branch, where igmp_grpallocfind() allocates a group
for 0.0.0.0 and schedules a report for it, while joined groups never have
their report timers restarted.  The querier then ages out the membership
and multicast delivery to the device stops.

Signed-off-by: Jacob Dahl <dahl.jakejacob@gmail.com>
2026-08-03 17:22:28 +08:00
.github !arch/stm32: move stm32l1 and finalize the directory split 2026-07-03 10:27:27 +08:00
arch arch/arm/src/stm32: fix H5 I2C kernel-clock register names 2026-08-03 17:16:42 +08:00
audio include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
binfmt fs/binfmt: Enforce POSIX execute permissions prior to binary load 2026-06-17 17:11:07 +08:00
boards boards/arm/stm32{f1,f4}: drop duplicated reset.c/romfs, use common board logic 2026-08-03 17:18:53 +08:00
cmake !boards: enforce secure ROMFS passwd and TEA key setup 2026-07-06 12:04:07 -03:00
crypto !nuttx: drop redundant casts on tv_sec/tv_nsec and fix printf formats 2026-05-19 16:21:28 +08:00
Documentation fix: remove cross-reference to ip6tables doc not yet in tree 2026-07-16 09:06:26 +02:00
drivers drivers/net/w5500: fix wrong variable and d_private assignment 2026-08-03 17:17:11 +08:00
dummy
fs fs/procfs: fix incorrect environ read for another task under CONFIG_ARCH_ADDRENV 2026-08-03 17:16:54 +08:00
graphics !include/fcntl.h: align open flags with Linux values 2026-07-03 10:33:47 +08:00
include drivers/audio/i2s: Fix unsigned integers in function signatures 2026-07-06 19:57:13 +08:00
libs libc/stream: Check lowout bounds before access 2026-07-06 19:55:11 +08:00
mm mm/gran: reject pools with too many granules 2026-07-03 10:32:15 +08:00
net fix(net/igmp): restore General Query handling broken by pointer compare 2026-08-03 17:22:28 +08:00
openamp openamp: fix CMake dcache option 2026-05-10 15:03:24 +02:00
pass1 Makefile: Remove make depend files by make distclean 2026-02-16 16:27:57 +01:00
sched sched/misc/assert: Add CONFIG_SCHED_DUMP_TASKS and CONFIG_SCHED_DUMP_STACK 2026-07-04 13:29:32 -04:00
syscall syscall: fcntl param3 type to uintptr_t 2026-04-27 12:01:55 -03:00
tools !boards: enforce secure ROMFS passwd and TEA key setup 2026-07-06 12:04:07 -03:00
video video: ensure video library is non-empty 2026-05-08 19:51:39 +08:00
wireless include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines !boards: Remove NSH_ARCHINIT and board_app_initialize 2026-05-02 18:36:46 +08:00
.codespellrc arch/sim: replace macOS C++ constructor runtime hack with post-link patch 2026-05-19 07:08:55 -03:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +08:00
.gitignore git: Specify multiple build directories in .gitignore. 2026-05-20 03:06:58 +08:00
.gitmessage docs/contributing: Add a commit message template 2025-06-03 17:33:24 +08:00
.pre-commit-config.yaml pre-commit: enable codespell checks 2025-05-05 12:34:39 +08:00
.yamllint
AUTHORS AUTHORS: add Eren Terzioglu 2026-05-20 15:17:00 +08:00
CMakeLists.txt tools/rust: Fix aarch64 NuttX Rust target specs 2026-05-29 10:25:10 +02:00
CONTRIBUTING.md docs: Fix typos, formatting, and numbering in README.md and CONTRIBUTING.md. 2026-03-23 12:05:24 +01:00
INVIOLABLES.md
Kconfig sched/misc/assert: Add CONFIG_SCHED_DUMP_TASKS and CONFIG_SCHED_DUMP_STACK 2026-07-04 13:29:32 -04:00
LICENSE !arch/stm32: move stm32l1 and finalize the directory split 2026-07-03 10:27:27 +08:00
Makefile !boards: enforce secure ROMFS passwd and TEA key setup 2026-07-06 12:04:07 -03:00
NOTICE
README.md docs: Fix typos, formatting, and numbering in README.md and CONTRIBUTING.md. 2026-03-23 12:05:24 +01:00
ReleaseNotes Documentation: move ReleaseNotes 2023-09-26 20:41:00 +08:00

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

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