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[SMF] Use fe80::1 if link-local address is not available (#1294)

This commit is contained in:
Supreeth Herle 2021-12-17 12:48:22 +01:00 committed by GitHub
parent 414c230f00
commit 1d496e92cd
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 8 deletions
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23
src/smf/gtp-path.c
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@ -269,11 +269,9 @@ int smf_gtp_open(void)
/* Fetch link-local address for router advertisement */
if (ogs_gtp_self()->link_local_addr)
ogs_freeaddrinfo(ogs_gtp_self()->link_local_addr);
ogs_gtp_self()->link_local_addr = ogs_link_local_addr(NULL, NULL);
if (!ogs_gtp_self()->link_local_addr) {
ogs_error("No link-local address for router advertisement");
return OGS_ERROR;
}
if (ogs_gtp_self()->gtpu_addr6)
ogs_gtp_self()->link_local_addr =
ogs_link_local_addr(NULL, ogs_gtp_self()->gtpu_addr6);
return OGS_OK;
}
@ -424,9 +422,18 @@ static void send_router_advertisement(smf_sess_t *sess, uint8_t *ip6_dst)
ogs_assert(subnet);
/* Fetch link-local address for router advertisement */
OGS_ADDR(ogs_gtp_self()->link_local_addr, ipstr);
rv = ogs_ipsubnet(&src_ipsub, ipstr, NULL);
ogs_expect_or_return(rv == OGS_OK);
if (ogs_gtp_self()->link_local_addr) {
OGS_ADDR(ogs_gtp_self()->link_local_addr, ipstr);
rv = ogs_ipsubnet(&src_ipsub, ipstr, NULL);
ogs_expect_or_return(rv == OGS_OK);
} else {
/* For the case of loopback used for GTPU link-local address is not
* available, hence set the source IP to fe80::1
*/
memset(src_ipsub.sub, 0, sizeof(src_ipsub.sub));
src_ipsub.sub[0] = htobe32(0xfe800000);
src_ipsub.sub[3] = htobe32(0x00000001);
}
ogs_debug(" Build Router Advertisement");