[components][lwip] Add macro control for some content in the lwip section

[rcitach]

拉取/合并请求描述：(PR description)

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为什么提交这份PR (why to submit this PR)

你的解决方案是什么 (what is your solution)

请提供验证的bsp和config (provide the config and bsp)

• BSP:

• .config:

• action:

]

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必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用clang-format 源码格式化工具确保格式符合RT-Thread代码规范 This PR has been formatted with clang-format and complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

[github-actions]

📌 Code Review Assignment

🏷️ Tag: components

Reviewers: @Maihuanyi

Changed Files (Click to expand)

• components/drivers/wlan/dev_wlan_lwip.c
• components/drivers/wlan/dev_wlan_mgnt.c
• components/drivers/wlan/dev_wlan_prot.h
• components/net/lwip-dhcpd/dhcp_server_raw.c
• components/net/lwip/lwip-2.1.2/src/core/pbuf.c
• components/net/lwip/port/lwipopts.h

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📊 Current Review Status (Last Updated: 2026-10-13 16:09 CST)

• ⌛ @Maihuanyi Pending Review

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[github-actions]

👋 感谢您对 RT-Thread 的贡献！Thank you for your contribution to RT-Thread!

为确保代码符合 RT-Thread 的编码规范，请在你的仓库中执行以下步骤运行代码格式化工作流（如果格式化CI运行失败）。
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[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• at32f415-start
• esp32-c3
• gd32105r-start
• hc32f334
• hpmicro-hpm5301evklite
• infineon-psoc6
• k230
• loongson-ls1cdev
• nordic-nrf51822
• nuvoton-m487
• nxp-lpc1114
• qemu-virt64-aarch64
• raspberry-pico-rp2040
• renesas-ra2l1
• simulator
• stm32f407-rt-spark
• stm32l475-atk-pandora-llvm
• wch-ch32v208w-r0
• x86
• xuantie-e901plus

[Copilot]

🟡 Changes recommended

Pbuf margin handling and AP reconfiguration remain incomplete, and the PR metadata does not describe the full scope.

6 open findings

• pbuf_realloc drops reserved tailroom when shrinking · New
• AP configuration comparison omits the band · New
• Advanced AP API fails to restart for active configuration changes · New
• Shared margin option is unsupported in three lwIP versions · New
• PR title omits WLAN management changes · New
• PR description is still missing required change and validation details · New

What changed in this PR

Adds lwIP tuning controls alongside WLAN and DHCP reliability changes. / 增加 lwIP 调优配置，并改进 WLAN 与 DHCP 可靠性。

Changes:

• Adds configurable lwIP memory, pbuf, and mailbox settings.
• Improves DHCP cleanup and WLAN state/error handling.
• Adds direct WLAN-to-lwIP packet input.

File	Description
components/​net/​lwip/​port/​lwipopts.h	Adds lwIP configuration overrides.
components/​net/​lwip/​lwip-2.1.2/​src/​core/​pbuf.c	Adds configurable pbuf tailroom.
components/​net/​lwip-dhcpd/​dhcp_server_raw.c	Improves lease traversal and startup cleanup.
components/​drivers/​wlan/​dev_wlan_prot.h	Declares direct lwIP input API.
components/​drivers/​wlan/​dev_wlan_mgnt.c	Updates disconnect and AP reconfiguration handling.
components/​drivers/​wlan/​dev_wlan_lwip.c	Clears DNS, adds direct input, and propagates TX errors.

🧠 Review effort: Balanced

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