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busybox: the DHCP client would sometimes send a superflous port unreachable frame

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Fixes: WIFI-14149
Signed-off-by: John Crispin <john@phrozen.org>
This commit is contained in:
John Crispin
2025-03-24 10:58:39 +01:00
parent 50abd015b3
commit 1b10507cf1
1 changed files with 70 additions and 0 deletions
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70
patches/0087-busybox-the-DHCP-client-would-sometimes-send-a-super.patch Normal file
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@@ -0,0 +1,70 @@
From 42252a58e7396370a32444339f409a8c4635d232 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Mon, 24 Mar 2025 10:57:41 +0100
Subject: [PATCH] busybox: the DHCP client would sometimes send a superflous
port unreachable frame
Signed-off-by: John Crispin <john@phrozen.org>
---
.../patches/600-dhcp-port-unreachable.patch | 49 +++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 package/utils/busybox/patches/600-dhcp-port-unreachable.patch
diff --git a/package/utils/busybox/patches/600-dhcp-port-unreachable.patch b/package/utils/busybox/patches/600-dhcp-port-unreachable.patch
new file mode 100644
index 0000000000..2055f9750a
--- /dev/null
+++ b/package/utils/busybox/patches/600-dhcp-port-unreachable.patch
@@ -0,0 +1,49 @@
+diff --git a/package/utils/busybox/patches/202-udhcpc_reuseport.patch b/package/utils/busybox/patches/202-udhcpc_reuseport.patch
+new file mode 100644
+index 000000000000..d91d58397ee9
+--- /dev/null
++++ b/package/utils/busybox/patches/202-udhcpc_reuseport.patch
+@@ -0,0 +1,43 @@
++--- a/libbb/xconnect.c
+++++ b/libbb/xconnect.c
++@@ -37,6 +37,10 @@ void FAST_FUNC setsockopt_reuseaddr(int
++ {
++ setsockopt_SOL_SOCKET_1(fd, SO_REUSEADDR);
++ }
+++int FAST_FUNC setsockopt_reuseport(int fd)
+++{
+++ return setsockopt_SOL_SOCKET_1(fd, SO_REUSEPORT);
+++}
++ int FAST_FUNC setsockopt_broadcast(int fd)
++ {
++ return setsockopt_SOL_SOCKET_1(fd, SO_BROADCAST);
++--- a/include/libbb.h
+++++ b/include/libbb.h
++@@ -734,6 +734,7 @@ int setsockopt_SOL_SOCKET_1(int fd, int
++ * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
++ * Turn it on before you call bind(). */
++ void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
+++int setsockopt_reuseport(int fd) FAST_FUNC;
++ int setsockopt_keepalive(int fd) FAST_FUNC;
++ int setsockopt_broadcast(int fd) FAST_FUNC;
++ int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
++--- a/networking/udhcp/packet.c
+++++ b/networking/udhcp/packet.c
++@@ -206,6 +206,7 @@ int FAST_FUNC udhcp_send_kernel_packet(s
++ goto ret_msg;
++ }
++ setsockopt_reuseaddr(fd);
+++ setsockopt_reuseport(fd);
++
++ /* If interface carrier goes down, unless we
++ * bind socket to a particular netdev, the packet
++--- a/networking/udhcp/socket.c
+++++ b/networking/udhcp/socket.c
++@@ -86,6 +86,7 @@ int FAST_FUNC udhcp_listen_socket(/*uint
++ fd = xsocket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
++
++ setsockopt_reuseaddr(fd);
+++ setsockopt_reuseport(fd);
++ if (setsockopt_broadcast(fd) == -1)
++ bb_simple_perror_msg_and_die("SO_BROADCAST");
++
--
2.34.1