From 95d3570b47429b54b735cfe96f676e523b1470d3 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 6 Mar 2024 12:28:51 +0900
Subject: [PATCH] sd-ndisc-router: introduce
 sd_ndisc_router_set_sender_address()

Currently this is not used, but will be used later to modify the sender
address.
---
 src/libsystemd-network/icmp6-packet.c    | 11 +++++++++++
 src/libsystemd-network/icmp6-packet.h    |  1 +
 src/libsystemd-network/sd-ndisc-router.c |  6 ++++++
 src/systemd/sd-ndisc-router.h            |  1 +
 4 files changed, 19 insertions(+)

diff --git a/src/libsystemd-network/icmp6-packet.c b/src/libsystemd-network/icmp6-packet.c
index 35459d11a29..21d744beaa4 100644
--- a/src/libsystemd-network/icmp6-packet.c
+++ b/src/libsystemd-network/icmp6-packet.c
@@ -27,6 +27,17 @@ static ICMP6Packet* icmp6_packet_new(size_t size) {
         return p;
 }
 
+int icmp6_packet_set_sender_address(ICMP6Packet *p, const struct in6_addr *addr) {
+        assert(p);
+
+        if (addr)
+                p->sender_address = *addr;
+        else
+                p->sender_address = (const struct in6_addr) {};
+
+        return 0;
+}
+
 int icmp6_packet_get_sender_address(ICMP6Packet *p, struct in6_addr *ret) {
         assert(p);
 
diff --git a/src/libsystemd-network/icmp6-packet.h b/src/libsystemd-network/icmp6-packet.h
index 7d02534a8c2..16f354fc95a 100644
--- a/src/libsystemd-network/icmp6-packet.h
+++ b/src/libsystemd-network/icmp6-packet.h
@@ -21,6 +21,7 @@ ICMP6Packet* icmp6_packet_ref(ICMP6Packet *p);
 ICMP6Packet* icmp6_packet_unref(ICMP6Packet *p);
 DEFINE_TRIVIAL_CLEANUP_FUNC(ICMP6Packet*, icmp6_packet_unref);
 
+int icmp6_packet_set_sender_address(ICMP6Packet *p, const struct in6_addr *addr);
 int icmp6_packet_get_sender_address(ICMP6Packet *p, struct in6_addr *ret);
 int icmp6_packet_get_timestamp(ICMP6Packet *p, clockid_t clock, usec_t *ret);
 const struct icmp6_hdr* icmp6_packet_get_header(ICMP6Packet *p);
diff --git a/src/libsystemd-network/sd-ndisc-router.c b/src/libsystemd-network/sd-ndisc-router.c
index 4b4cc530a69..f8476c4d6bd 100644
--- a/src/libsystemd-network/sd-ndisc-router.c
+++ b/src/libsystemd-network/sd-ndisc-router.c
@@ -40,6 +40,12 @@ sd_ndisc_router* ndisc_router_new(ICMP6Packet *packet) {
         return rt;
 }
 
+int sd_ndisc_router_set_sender_address(sd_ndisc_router *rt, const struct in6_addr *addr) {
+        assert_return(rt, -EINVAL);
+
+        return icmp6_packet_set_sender_address(rt->packet, addr);
+}
+
 int sd_ndisc_router_get_sender_address(sd_ndisc_router *rt, struct in6_addr *ret) {
         assert_return(rt, -EINVAL);
 
diff --git a/src/systemd/sd-ndisc-router.h b/src/systemd/sd-ndisc-router.h
index 32ee5796e63..b07fefba3b9 100644
--- a/src/systemd/sd-ndisc-router.h
+++ b/src/systemd/sd-ndisc-router.h
@@ -33,6 +33,7 @@ sd_ndisc_router *sd_ndisc_router_ref(sd_ndisc_router *rt);
 sd_ndisc_router *sd_ndisc_router_unref(sd_ndisc_router *rt);
 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_ndisc_router, sd_ndisc_router_unref);
 
+int sd_ndisc_router_set_sender_address(sd_ndisc_router *rt, const struct in6_addr *addr);
 int sd_ndisc_router_get_sender_address(sd_ndisc_router *rt, struct in6_addr *ret);
 int sd_ndisc_router_get_timestamp(sd_ndisc_router *rt, clockid_t clock, uint64_t *ret);