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head/sbin/dhclient/dhclient.c
| Show First 20 Lines • Show All 857 Lines • ▼ Show 20 Lines | bind_lease(struct interface_info *ip) | ||||
| struct option_data *opt; | struct option_data *opt; | ||||
| /* Remember the medium. */ | /* Remember the medium. */ | ||||
| ip->client->new->medium = ip->client->medium; | ip->client->new->medium = ip->client->medium; | ||||
| opt = &ip->client->new->options[DHO_INTERFACE_MTU]; | opt = &ip->client->new->options[DHO_INTERFACE_MTU]; | ||||
| if (opt->len == sizeof(u_int16_t)) { | if (opt->len == sizeof(u_int16_t)) { | ||||
| u_int16_t mtu = 0; | u_int16_t mtu = 0; | ||||
| u_int16_t old_mtu = 0; | |||||
| bool supersede = (ip->client->config->default_actions[DHO_INTERFACE_MTU] == | bool supersede = (ip->client->config->default_actions[DHO_INTERFACE_MTU] == | ||||
| ACTION_SUPERSEDE); | ACTION_SUPERSEDE); | ||||
| if (supersede) | if (supersede) | ||||
| mtu = getUShort(ip->client->config->defaults[DHO_INTERFACE_MTU].data); | mtu = getUShort(ip->client->config->defaults[DHO_INTERFACE_MTU].data); | ||||
| else | else | ||||
| mtu = be16dec(opt->data); | mtu = be16dec(opt->data); | ||||
| if (ip->client->active) { | |||||
| opt = &ip->client->active->options[DHO_INTERFACE_MTU]; | |||||
| if (opt->len == sizeof(u_int16_t)) { | |||||
| old_mtu = be16dec(opt->data); | |||||
| } | |||||
| } | |||||
| if (mtu < MIN_MTU) { | if (mtu < MIN_MTU) { | ||||
| /* Treat 0 like a user intentionally doesn't want to change MTU and, | /* Treat 0 like a user intentionally doesn't want to change MTU and, | ||||
| * therefore, warning is not needed */ | * therefore, warning is not needed */ | ||||
| if (!supersede || mtu != 0) | if (!supersede || mtu != 0) | ||||
| warning("mtu size %u < %d: ignored", (unsigned)mtu, MIN_MTU); | warning("mtu size %u < %d: ignored", (unsigned)mtu, MIN_MTU); | ||||
| } else { | } else if (ip->client->state != S_RENEWING || mtu != old_mtu) { | ||||
| interface_set_mtu_unpriv(privfd, mtu); | interface_set_mtu_unpriv(privfd, mtu); | ||||
| } | } | ||||
| } | } | ||||
| /* Write out the new lease. */ | /* Write out the new lease. */ | ||||
| write_client_lease(ip, ip->client->new, 0); | write_client_lease(ip, ip->client->new, 0); | ||||
| /* Run the client script with the new parameters. */ | /* Run the client script with the new parameters. */ | ||||
| ▲ Show 20 Lines • Show All 1,953 Lines • Show Last 20 Lines | |||||