diff options
| author | Alexander Couzens <lynxis@fe80.eu> | 2021-02-15 02:58:22 +0100 |
|---|---|---|
| committer | lynxis lazus <lynxis@fe80.eu> | 2021-02-19 10:41:50 +0000 |
| commit | 3de1cb0d727c6175745db90ce8614ff6607b6961 (patch) | |
| tree | c8bbf01ae1b7fe31baa7806ef3ece21b7ba98732 | |
| parent | 67725e2920662f739d4a6626442079e30f0f272c (diff) | |
gprs_ns2_fr: pass MTU changes to the NSE
When the MTU of the frame relay device changes, update the bind
and notify all NSEs.
Related: OS#4889
Change-Id: I946f7655c9526ffd98dabdce219c6a419b71e00c
| -rw-r--r-- | src/gb/gprs_ns2_fr.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/src/gb/gprs_ns2_fr.c b/src/gb/gprs_ns2_fr.c index 445f00ac..6ba22687 100644 --- a/src/gb/gprs_ns2_fr.c +++ b/src/gb/gprs_ns2_fr.c @@ -596,6 +596,27 @@ static void link_state_change(struct gprs_ns2_vc_bind *bind, bool if_running) bpriv->if_running = if_running; } +static void mtu_change(struct gprs_ns2_vc_bind *bind, uint32_t mtu) +{ + struct priv_bind *bpriv = bind->priv; + struct gprs_ns2_nse *nse; + + if (mtu == bind->mtu) + return; + + LOGBIND(bind, LOGL_INFO, "MTU changed from %d to %d.\n", + bind->mtu, mtu); + + /* 2 byte DLCI header */ + bind->mtu = mtu - 2; + if (!bpriv->if_running) + return; + + llist_for_each_entry(nse, &bind->nsi->nse, list) { + ns2_nse_update_mtu(nse); + } +} + /* handle a single netlink message received via libmnl */ static int linkmon_mnl_cb(const struct nlmsghdr *nlh, void *data) { @@ -623,8 +644,14 @@ static int linkmon_mnl_cb(const struct nlmsghdr *nlh, void *data) if_running = !!(ifm->ifi_flags & IFF_RUNNING); bind = bind4netdev(nsi, ifname); - if (bind) - link_state_change(bind, if_running); + if (!bind) + return MNL_CB_OK; + + if (tb[IFLA_MTU]) { + mtu_change(bind, mnl_attr_get_u32(tb[IFLA_MTU])); + } + + link_state_change(bind, if_running); return MNL_CB_OK; } |