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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <netinet/icmp6.h>
#include "sd-radv.h"
#include "alloc-util.h"
#include "in-addr-util.h"
#include "ndisc-option.h"
#include "ndisc-router-solicit-internal.h"
#include "radv-internal.h"
static sd_ndisc_router_solicit* ndisc_router_solicit_free(sd_ndisc_router_solicit *rs) {
if (!rs)
return NULL;
icmp6_packet_unref(rs->packet);
set_free(rs->options);
return mfree(rs);
}
DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_ndisc_router_solicit, sd_ndisc_router_solicit, ndisc_router_solicit_free);
sd_ndisc_router_solicit* ndisc_router_solicit_new(ICMP6Packet *packet) {
sd_ndisc_router_solicit *rs;
assert(packet);
rs = new(sd_ndisc_router_solicit, 1);
if (!rs)
return NULL;
*rs = (sd_ndisc_router_solicit) {
.n_ref = 1,
.packet = icmp6_packet_ref(packet),
};
return rs;
}
int ndisc_router_solicit_parse(sd_radv *ra, sd_ndisc_router_solicit *rs) {
int r;
assert(rs);
assert(rs->packet);
if (rs->packet->raw_size < sizeof(struct nd_router_solicit))
return log_radv_errno(ra, SYNTHETIC_ERRNO(EBADMSG),
"Too small to be a router solicit, ignoring.");
const struct nd_router_solicit *a = (const struct nd_router_solicit*) rs->packet->raw_packet;
assert(a);
assert(a->nd_rs_type == ND_ROUTER_SOLICIT);
assert(a->nd_rs_code == 0);
r = ndisc_parse_options(rs->packet, &rs->options);
if (r < 0)
return log_radv_errno(ra, r, "Failed to parse NDisc options in router solicit, ignoring datagram: %m");
/* RFC 4861 section 4.1.
* Source link-layer address:
* The link-layer address of the sender, if known. MUST NOT be included if the Source
* Address is the unspecified address. Otherwise, it SHOULD be included on link
* layers that have addresses. */
if (ndisc_option_get_mac(rs->options, SD_NDISC_OPTION_SOURCE_LL_ADDRESS, NULL) >= 0&&
sd_ndisc_router_solicit_get_sender_address(rs, NULL) == -ENODATA)
return log_radv_errno(ra, SYNTHETIC_ERRNO(EBADMSG),
"Router Solicitation message from null address unexpectedly contains source link-layer address option, ignoring datagaram.");
return 0;
}
int sd_ndisc_router_solicit_get_sender_address(sd_ndisc_router_solicit *rs, struct in6_addr *ret) {
assert_return(rs, -EINVAL);
return icmp6_packet_get_sender_address(rs->packet, ret);
}
int sd_ndisc_router_solicit_get_sender_mac(sd_ndisc_router_solicit *rs, struct ether_addr *ret) {
assert_return(rs, -EINVAL);
return ndisc_option_get_mac(rs->options, SD_NDISC_OPTION_SOURCE_LL_ADDRESS, ret);
}
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