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sd-ndisc-router: introduce sd_ndisc_router_get_sender_mac()

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The Router Advertisement option can take the MAC address of the sender.
Let's introduce a function to get it from the parsed options.
This commit is contained in:
Yu Watanabe
2024-02-29 12:45:51 +09:00
parent 0216c67269
commit b43c2221f6
2 changed files with 8 additions and 0 deletions
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6
src/libsystemd-network/sd-ndisc-router.c
View File

@@ -175,6 +175,12 @@ int sd_ndisc_router_get_preference(sd_ndisc_router *rt, unsigned *ret) {
return 0;
}
int sd_ndisc_router_get_sender_mac(sd_ndisc_router *rt, struct ether_addr *ret) {
assert_return(rt, -EINVAL);
return ndisc_option_get_mac(rt->options, SD_NDISC_OPTION_SOURCE_LL_ADDRESS, ret);
}
int sd_ndisc_router_get_mtu(sd_ndisc_router *rt, uint32_t *ret) {
assert_return(rt, -EINVAL);
assert_return(ret, -EINVAL);

2
src/systemd/sd-ndisc-router.h
View File

@@ -18,6 +18,7 @@
***/
#include <inttypes.h>
#include <net/ethernet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <time.h>
@@ -42,6 +43,7 @@ int sd_ndisc_router_get_lifetime(sd_ndisc_router *rt, uint64_t *ret);
int sd_ndisc_router_get_lifetime_timestamp(sd_ndisc_router *rt, clockid_t clock, uint64_t *ret);
int sd_ndisc_router_get_reachable_time(sd_ndisc_router *rt, uint64_t *ret);
int sd_ndisc_router_get_retransmission_time(sd_ndisc_router *rt, uint64_t *ret);
int sd_ndisc_router_get_sender_mac(sd_ndisc_router *rt, struct ether_addr *ret);
int sd_ndisc_router_get_mtu(sd_ndisc_router *rt, uint32_t *ret);
/* Generic option access */