diff options
| author | Aleksander Morgado <aleksandermj@chromium.org> | 2023-11-28 12:47:17 +0000 |
|---|---|---|
| committer | Aleksander Morgado <aleksandermj@chromium.org> | 2023-11-28 14:01:24 +0000 |
| commit | 3ccf847284e7b946995b2b82cf318c2a4027a24d (patch) | |
| tree | 377b6ab06a1b2300ef250aa471806698309b1732 | |
| parent | e35655b364d32fce787cd3980c876f3946f82192 (diff) | |
bearer-mbim: warn and workaround wrong link prefix length in static IPv6 config
Seems to happen with e.g. the Fibocom FM350:
# mmcli -b 2
------------------------------------
IPv6 configuration | method: static
| address: 2607:fb90:dd16:d38a:ac39:89f1:67a7:5a9d
| prefix: 128
| gateway: 2607:fb90:dd16:d38a:ac39:89f1:67a7:5a01
| dns: fd00:976a::9, fd00:976a::10
| mtu: 1436
| -rw-r--r-- | src/mm-bearer-mbim.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mm-bearer-mbim.c b/src/mm-bearer-mbim.c index 03eb3789..7988a080 100644 --- a/src/mm-bearer-mbim.c +++ b/src/mm-bearer-mbim.c @@ -563,6 +563,14 @@ ip_configuration_query_ready (MbimDevice *device, /* Netmask */ mm_bearer_ip_config_set_prefix (ipv6_config, ipv6address[0]->on_link_prefix_length); + /* If the modem has done SLAAC itself, it is never expected to return a /128 prefix, + * warn if it happens and workaround it. Use /64 as default. */ + if ((mm_bearer_ip_config_get_method (ipv6_config) == MM_BEARER_IP_METHOD_STATIC) && + (mm_bearer_ip_config_get_prefix (ipv6_config) == 128)) { + mm_obj_warn (self, "unexpected link prefix returned with global IPv6 address (128): ignoring"); + mm_bearer_ip_config_set_prefix (ipv6_config, 64); + } + /* Gateway */ if (ipv6configurationavailable & MBIM_IP_CONFIGURATION_AVAILABLE_FLAG_GATEWAY) { g_autoptr(GInetAddress) gw_addr = NULL; |