From: Roy Marples <roy@marples.name>
Date: Tue, 19 May 2020 16:44:49 +0000 (+0000)
Subject: Linux: workaround a kernel bug when sending DHCPv6 over SOCK_RAW
X-Git-Tag: v9.1.0~51
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4a1bd6bf60f4857c45519d62013b8d77c5915b0;p=thirdparty%2Fdhcpcd.git

Linux: workaround a kernel bug when sending DHCPv6 over SOCK_RAW

The equivalent works fine for DHCP messages, so hum ho.
---

diff --git a/src/dhcp6.c b/src/dhcp6.c
index e432bfa4..ad0f9b54 100644
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -1209,7 +1209,12 @@ dhcp6_sendmessage(struct interface *ifp, void (*callback)(void *))
 	bool broadcast = true;
 	struct sockaddr_in6 dst = {
 	    .sin6_family = AF_INET6,
+	    /* Setting the port on Linux gives EINVAL when sending.
+	     * This looks like a kernel bug as the equivalent works
+	     * fine with the DHCP counterpart. */
+#ifndef __linux__
 	    .sin6_port = htons(DHCP6_SERVER_PORT),
+#endif
 	};
 	struct udphdr udp = {
 	    .uh_sport = htons(DHCP6_CLIENT_PORT),