コード例 #1
0
ファイル: networkd-ipv4ll.c プロジェクト: lnykryn/systemd
static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
        Link *link = userdata;
        int r;

        assert(link);
        assert(link->network);
        assert(link->manager);

        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                return;

        switch(event) {
                case SD_IPV4LL_EVENT_STOP:
                case SD_IPV4LL_EVENT_CONFLICT:
                        r = ipv4ll_address_lost(link);
                        if (r < 0) {
                                link_enter_failed(link);
                                return;
                        }
                        break;
                case SD_IPV4LL_EVENT_BIND:
                        r = ipv4ll_address_claimed(ll, link);
                        if (r < 0) {
                                link_enter_failed(link);
                                return;
                        }
                        break;
                default:
                        log_link_warning(link, "IPv4 link-local unknown event: %d", event);
                        break;
        }
}
コード例 #2
0
ファイル: networkd-dhcp6.c プロジェクト: binarin/systemd
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
        int r;
        Link *link = userdata;

        assert(link);
        assert(link->network);
        assert(link->manager);

        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                return;

        switch(event) {
        case SD_DHCP6_CLIENT_EVENT_STOP:
        case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
        case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
                if (sd_dhcp6_client_get_lease(client, NULL) >= 0)
                        log_link_warning(link, "DHCPv6 lease lost");

                link->dhcp6_configured = false;
                break;

        case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
                r = dhcp6_lease_address_acquired(client, link);
                if (r < 0) {
                        link_enter_failed(link);
                        return;
                }

                /* fall through */
        case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
                r = dhcp6_lease_information_acquired(client, link);
                if (r < 0) {
                        link_enter_failed(link);
                        return;
                }

                link->dhcp6_configured = true;
                break;

        default:
                if (event < 0)
                        log_link_warning_errno(link, event, "DHCPv6 error: %m");
                else
                        log_link_warning(link, "DHCPv6 unknown event: %d", event);
                return;
        }

        link_check_ready(link);
}
コード例 #3
0
ファイル: networkd-dhcp6.c プロジェクト: eidoscode/systemd
static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
                                 void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                if (link->rtnl_extended_attrs) {
                        log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism");

                        link->rtnl_extended_attrs = false;
                        dhcp6_lease_address_acquired(link->dhcp6_client, link);

                        return 1;
                }

                log_link_error_errno(link, r, "Could not set DHCPv6 address: %m");

                link_enter_failed(link);

        } else if (r >= 0)
                manager_rtnl_process_address(rtnl, m, link->manager);

        return 1;
}
コード例 #4
0
ファイル: networkd-ndisc.c プロジェクト: ChALkeR/systemd
static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
        _cleanup_route_free_ Route *route = NULL;
        struct in6_addr gateway;
        uint16_t lifetime;
        unsigned preference;
        usec_t time_now;
        int r;

        assert(link);
        assert(rt);

        r = sd_ndisc_router_get_lifetime(rt, &lifetime);
        if (r < 0) {
                log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
                return;
        }
        if (lifetime == 0) /* not a default router */
                return;

        r = sd_ndisc_router_get_address(rt, &gateway);
        if (r < 0) {
                log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
                return;
        }

        r = sd_ndisc_router_get_preference(rt, &preference);
        if (r < 0) {
                log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
                return;
        }

        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
        if (r < 0) {
                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
                return;
        }

        r = route_new(&route);
        if (r < 0) {
                log_link_error_errno(link, r, "Could not allocate route: %m");
                return;
        }

        route->family = AF_INET6;
        route->table = RT_TABLE_MAIN;
        route->protocol = RTPROT_RA;
        route->pref = preference;
        route->gw.in6 = gateway;
        route->lifetime = time_now + lifetime * USEC_PER_SEC;

        r = route_configure(route, link, ndisc_netlink_handler);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not set default route: %m");
                link_enter_failed(link);
                return;
        }

        link->ndisc_messages++;
}
コード例 #5
0
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
        int r;
        Link *link = userdata;

        assert(link);
        assert(link->network);
        assert(link->manager);

        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                return;

        switch(event) {
        case DHCP6_EVENT_STOP:
        case DHCP6_EVENT_RESEND_EXPIRE:
        case DHCP6_EVENT_RETRANS_MAX:
                log_link_debug(link, "DHCPv6 event %d", event);
                break;

        case DHCP6_EVENT_IP_ACQUIRE:
                r = dhcp6_lease_address_acquired(client, link);
                if (r < 0) {
                        link_enter_failed(link);
                        return;
                }

                /* fall through */
        case DHCP6_EVENT_INFORMATION_REQUEST:
                r = dhcp6_lease_information_acquired(client, link);
                if (r < 0) {
                        link_enter_failed(link);
                        return;
                }

                break;

        default:
                if (event < 0)
                        log_link_warning(link, "DHCPv6 error: %s",
                                         strerror(-event));
                else
                        log_link_warning(link, "DHCPv6 unknown event: %d",
                                         event);
                return;
        }
}
コード例 #6
0
ファイル: networkd-dhcp4.c プロジェクト: NgoHuy/systemd
static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
        sd_dhcp_lease *lease;
        struct in_addr address;
        struct in_addr netmask;
        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
        int r;

        assert(link);
        assert(client);
        assert(link->network);

        r = sd_dhcp_client_get_lease(client, &lease);
        if (r < 0) {
                log_link_warning(link, "DHCP error: no lease %s",
                                 strerror(-r));
                return r;
        }

        sd_dhcp_lease_unref(link->dhcp_lease);
        link->dhcp4_configured = false;
        link->dhcp_lease = sd_dhcp_lease_ref(lease);

        r = sd_dhcp_lease_get_address(lease, &address);
        if (r < 0) {
                log_link_warning(link, "DHCP error: no address: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_dhcp_lease_get_netmask(lease, &netmask);
        if (r < 0) {
                log_link_warning(link, "DHCP error: no netmask: %s",
                                 strerror(-r));
                return r;
        }

        if (!link->network->dhcp_critical) {
                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
                                               &lifetime);
                if (r < 0) {
                        log_link_warning(link,
                                         "DHCP error: no lifetime: %s",
                                         strerror(-r));
                        return r;
                }
        }

        r = dhcp4_update_address(link, &address, &netmask, lifetime);
        if (r < 0) {
                log_link_warning(link, "could not update IP address: %s",
                                 strerror(-r));
                link_enter_failed(link);
                return r;
        }

        return 0;
}
コード例 #7
0
ファイル: networkd-ndisc.c プロジェクト: ChALkeR/systemd
static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
        _cleanup_route_free_ Route *route = NULL;
        usec_t time_now;
        uint32_t lifetime;
        unsigned prefixlen;
        int r;

        assert(link);
        assert(rt);

        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
        if (r < 0) {
                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
                return;
        }

        r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix length: %m");
                return;
        }

        r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix lifetime: %m");
                return;
        }

        r = route_new(&route);
        if (r < 0) {
                log_link_error_errno(link, r, "Could not allocate route: %m");
                return;
        }

        route->family = AF_INET6;
        route->table = RT_TABLE_MAIN;
        route->protocol = RTPROT_RA;
        route->flags = RTM_F_PREFIX;
        route->dst_prefixlen = prefixlen;
        route->lifetime = time_now + lifetime * USEC_PER_SEC;

        r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix address: %m");
                return;
        }

        r = route_configure(route, link, ndisc_netlink_handler);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not set prefix route: %m");
                link_enter_failed(link);
                return;
        }

        link->ndisc_messages++;
}
コード例 #8
0
ファイル: networkd-dhcp4.c プロジェクト: embe/systemd
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
                                 void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
                link_enter_failed(link);
        } else if (r >= 0)
                manager_rtnl_process_address(rtnl, m, link->manager);

        link_set_dhcp_routes(link);

        return 1;
}
コード例 #9
0
static int dhcp6_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
                                 void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);

        r = sd_rtnl_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error(link, "Could not set DHCPv6 address: %s",
                               strerror(-r));

                link_enter_failed(link);

        } else if (r >= 0)
                link_rtnl_process_address(rtnl, m, link->manager);

        return 1;
}
コード例 #10
0
ファイル: networkd-ipv4ll.c プロジェクト: lnykryn/systemd
static int ipv4ll_route_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);
        assert(!link->ipv4ll_route);

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "could not set ipv4ll route: %m");
                link_enter_failed(link);
        }

        link->ipv4ll_route = true;

        if (link->ipv4ll_address == true)
                link_check_ready(link);

        return 1;
}
コード例 #11
0
ファイル: networkd-ipv4ll.c プロジェクト: halfline/systemd
static int ipv4ll_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
        _cleanup_(link_unrefp) Link *link = userdata;
        int r;

        assert(link);
        assert(!link->ipv4ll_address);

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "could not set ipv4ll address: %m");
                link_enter_failed(link);
        } else if (r >= 0)
                manager_rtnl_process_address(rtnl, m, link->manager);

        link->ipv4ll_address = true;

        if (link->ipv4ll_route)
                link_check_ready(link);

        return 1;
}
コード例 #12
0
ファイル: networkd-dhcp4.c プロジェクト: msekletar/systemd
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
        int r;

        assert(link);
        assert(link->dhcp4_messages > 0);

        link->dhcp4_messages--;

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
                link_enter_failed(link);
        }

        if (link->dhcp4_messages == 0) {
                link->dhcp4_configured = true;
                link_check_ready(link);
        }

        return 1;
}
コード例 #13
0
ファイル: networkd-ipv4ll.c プロジェクト: pwaller/systemd
static int ipv4ll_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);
        assert(!link->ipv4ll_address);

        r = sd_rtnl_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error(link, "could not set ipv4ll address: %s", strerror(-r));
                link_enter_failed(link);
        } else if (r >= 0)
                link_rtnl_process_address(rtnl, m, link->manager);

        link->ipv4ll_address = true;

        if (link->ipv4ll_route == true)
                link_client_handler(link);

        return 1;
}
コード例 #14
0
ファイル: networkd-ndisc.c プロジェクト: ChALkeR/systemd
static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);
        assert(link->ndisc_messages > 0);

        link->ndisc_messages--;

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set NDisc route or address: %m");
                link_enter_failed(link);
        }

        if (link->ndisc_messages == 0) {
                link->ndisc_configured = true;
                link_check_ready(link);
        }

        return 1;
}
コード例 #15
0
ファイル: networkd-dhcp4.c プロジェクト: josephgbr/systemd
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
                               void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);
        assert(link->dhcp4_messages);

        link->dhcp4_messages --;

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
                link_enter_failed(link);
        }

        if (!link->dhcp4_messages) {
                link->dhcp4_configured = true;
                link_check_ready(link);
        }

        return 1;
}
コード例 #16
0
ファイル: networkd-dhcp4.c プロジェクト: pwaller/systemd
static int dhcp4_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
                               void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);
        assert(link->dhcp4_messages);

        link->dhcp4_messages --;

        r = sd_rtnl_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error(link, "could not set DHCPv4 route: %s",
                               strerror(-r));
                link_enter_failed(link);
        }

        if (!link->dhcp4_messages) {
                link->dhcp4_configured = true;
                link_client_handler(link);
        }

        return 1;
}
コード例 #17
0
ファイル: networkd-dhcp4.c プロジェクト: msekletar/systemd
static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
        int r;

        assert(link);

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
                link_enter_failed(link);
        } else if (r >= 0)
                manager_rtnl_process_address(rtnl, m, link->manager);

        link_set_dhcp_routes(link);

        /* Add back static routes since kernel removes while DHCPv4 address is removed from when lease expires */
        link_request_set_routes(link);

        if (link->dhcp4_messages == 0) {
                link->dhcp4_configured = true;
                link_check_ready(link);
        }

        return 1;
}
コード例 #18
0
ファイル: networkd-dhcp4.c プロジェクト: embe/systemd
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
        sd_dhcp_lease *lease;
        struct in_addr address;
        struct in_addr netmask;
        struct in_addr gateway;
        unsigned prefixlen;
        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
        int r;

        assert(client);
        assert(link);

        r = sd_dhcp_client_get_lease(client, &lease);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No lease: %m");

        r = sd_dhcp_lease_get_address(lease, &address);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No address: %m");

        r = sd_dhcp_lease_get_netmask(lease, &netmask);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No netmask: %m");

        prefixlen = in_addr_netmask_to_prefixlen(&netmask);

        r = sd_dhcp_lease_get_router(lease, &gateway);
        if (r < 0 && r != -ENODATA)
                return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");

        if (r >= 0)
                log_struct(LOG_INFO,
                           LOG_LINK_INTERFACE(link),
                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
                                            ADDRESS_FMT_VAL(address),
                                            prefixlen,
                                            ADDRESS_FMT_VAL(gateway)),
                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
                           "PREFIXLEN=%u", prefixlen,
                           "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),
                           NULL);
        else
                log_struct(LOG_INFO,
                           LOG_LINK_INTERFACE(link),
                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
                                            ADDRESS_FMT_VAL(address),
                                            prefixlen),
                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
                           "PREFIXLEN=%u", prefixlen,
                           NULL);

        link->dhcp_lease = sd_dhcp_lease_ref(lease);
        link_dirty(link);

        if (link->network->dhcp_use_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(lease, &mtu);
                if (r >= 0) {
                        r = link_set_mtu(link, mtu);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
                }
        }

        if (link->network->dhcp_use_hostname) {
                const char *hostname = NULL;

                if (link->network->dhcp_hostname)
                        hostname = link->network->dhcp_hostname;
                else
                        (void) sd_dhcp_lease_get_hostname(lease, &hostname);

                if (hostname) {
                        r = manager_set_hostname(link->manager, hostname);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
                }
        }

        if (link->network->dhcp_use_timezone) {
                const char *tz = NULL;

                (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);

                if (tz) {
                        r = manager_set_timezone(link->manager, tz);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
                }
        }

        if (!link->network->dhcp_critical) {
                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
                if (r < 0) {
                        log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
                        return r;
                }
        }

        r = dhcp4_update_address(link, &address, &netmask, lifetime);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not update IP address: %m");
                link_enter_failed(link);
                return r;
        }

        return 0;
}
コード例 #19
0
ファイル: networkd-dhcp4.c プロジェクト: embe/systemd
static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
        Link *link = userdata;
        int r = 0;

        assert(link);
        assert(link->network);
        assert(link->manager);

        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                return;

        switch (event) {
                case SD_DHCP_CLIENT_EVENT_EXPIRED:
                case SD_DHCP_CLIENT_EVENT_STOP:
                case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
                        if (link->network->dhcp_critical) {
                                log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");
                                return;
                        }

                        if (link->dhcp_lease) {
                                r = dhcp_lease_lost(link);
                                if (r < 0) {
                                        link_enter_failed(link);
                                        return;
                                }
                        }

                        if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {
                                r = dhcp_lease_acquired(client, link);
                                if (r < 0) {
                                        link_enter_failed(link);
                                        return;
                                }
                        }

                        break;
                case SD_DHCP_CLIENT_EVENT_RENEW:
                        r = dhcp_lease_renew(client, link);
                        if (r < 0) {
                                link_enter_failed(link);
                                return;
                        }
                        break;
                case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
                        r = dhcp_lease_acquired(client, link);
                        if (r < 0) {
                                link_enter_failed(link);
                                return;
                        }
                        break;
                default:
                        if (event < 0)
                                log_link_warning_errno(link, event, "DHCP error: Client failed: %m");
                        else
                                log_link_warning(link, "DHCP unknown event: %i", event);
                        break;
        }

        return;
}
コード例 #20
0
ファイル: networkd-dhcp4.c プロジェクト: embe/systemd
static int dhcp_lease_lost(Link *link) {
        _cleanup_address_free_ Address *address = NULL;
        struct in_addr addr;
        struct in_addr netmask;
        struct in_addr gateway;
        unsigned prefixlen = 0;
        int r;

        assert(link);
        assert(link->dhcp_lease);

        log_link_warning(link, "DHCP lease lost");

        if (link->network->dhcp_use_routes) {
                _cleanup_free_ sd_dhcp_route **routes = NULL;
                int n, i;

                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
                if (n >= 0) {
                        for (i = 0; i < n; i++) {
                                _cleanup_route_free_ Route *route = NULL;

                                r = route_new(&route);
                                if (r >= 0) {
                                        route->family = AF_INET;
                                        assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);
                                        assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);
                                        assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);

                                        route_remove(route, link,
                                                     link_route_remove_handler);
                                }
                        }
                }
        }

        r = address_new(&address);
        if (r >= 0) {
                r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
                if (r >= 0) {
                        _cleanup_route_free_ Route *route_gw = NULL;
                        _cleanup_route_free_ Route *route = NULL;

                        r = route_new(&route_gw);
                        if (r >= 0) {
                                route_gw->family = AF_INET;
                                route_gw->dst.in = gateway;
                                route_gw->dst_prefixlen = 32;
                                route_gw->scope = RT_SCOPE_LINK;

                                route_remove(route_gw, link,
                                             link_route_remove_handler);
                        }

                        r = route_new(&route);
                        if (r >= 0) {
                                route->family = AF_INET;
                                route->gw.in = gateway;

                                route_remove(route, link,
                                             link_route_remove_handler);
                        }
                }

                r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
                if (r >= 0) {
                        r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
                        if (r >= 0)
                                prefixlen = in_addr_netmask_to_prefixlen(&netmask);

                        address->family = AF_INET;
                        address->in_addr.in = addr;
                        address->prefixlen = prefixlen;

                        address_remove(address, link, link_address_remove_handler);
                }
        }

        if (link->network->dhcp_use_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
                if (r >= 0 && link->original_mtu != mtu) {
                        r = link_set_mtu(link, link->original_mtu);
                        if (r < 0) {
                                log_link_warning(link,
                                                 "DHCP error: could not reset MTU");
                                link_enter_failed(link);
                                return r;
                        }
                }
        }

        if (link->network->dhcp_use_hostname) {
                const char *hostname = NULL;

                if (link->network->dhcp_hostname)
                        hostname = link->network->dhcp_hostname;
                else
                        (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);

                if (hostname) {
                        /* If a hostname was set due to the lease, then unset it now. */
                        r = manager_set_hostname(link->manager, NULL);
                        if (r < 0)
                                log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
                }
        }

        link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
        link_dirty(link);
        link->dhcp4_configured = false;

        return 0;
}
コード例 #21
0
ファイル: networkd-ndisc.c プロジェクト: ChALkeR/systemd
static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) {
        _cleanup_address_free_ Address *address = NULL;
        uint32_t lifetime_valid, lifetime_preferred;
        unsigned prefixlen;
        int r;

        assert(link);
        assert(rt);

        r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix length: %m");
                return;
        }

        r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m");
                return;
        }

        r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m");
                return;
        }

        r = address_new(&address);
        if (r < 0) {
                log_link_error_errno(link, r, "Could not allocate address: %m");
                return;
        }

        address->family = AF_INET6;
        r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6);
        if (r < 0) {
                log_link_error_errno(link, r, "Failed to get prefix address: %m");
                return;
        }

        if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0)
                memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8);
        else {
                /* see RFC4291 section 2.5.1 */
                address->in_addr.in6.s6_addr[8]  = link->mac.ether_addr_octet[0];
                address->in_addr.in6.s6_addr[8] ^= 1 << 1;
                address->in_addr.in6.s6_addr[9]  = link->mac.ether_addr_octet[1];
                address->in_addr.in6.s6_addr[10] = link->mac.ether_addr_octet[2];
                address->in_addr.in6.s6_addr[11] = 0xff;
                address->in_addr.in6.s6_addr[12] = 0xfe;
                address->in_addr.in6.s6_addr[13] = link->mac.ether_addr_octet[3];
                address->in_addr.in6.s6_addr[14] = link->mac.ether_addr_octet[4];
                address->in_addr.in6.s6_addr[15] = link->mac.ether_addr_octet[5];
        }
        address->prefixlen = prefixlen;
        address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR;
        address->cinfo.ifa_prefered = lifetime_preferred;
        address->cinfo.ifa_valid = lifetime_valid;

        r = address_configure(address, link, ndisc_netlink_handler, true);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not set SLAAC address: %m");
                link_enter_failed(link);
                return;
        }

        link->ndisc_messages++;
}
コード例 #22
0
ファイル: networkd-dhcp4.c プロジェクト: pwaller/systemd
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
        sd_dhcp_lease *lease;
        struct in_addr address;
        struct in_addr netmask;
        struct in_addr gateway;
        unsigned prefixlen;
        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
        int r;

        assert(client);
        assert(link);

        r = sd_dhcp_client_get_lease(client, &lease);
        if (r < 0) {
                log_link_warning(link, "DHCP error: no lease: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_dhcp_lease_get_address(lease, &address);
        if (r < 0) {
                log_link_warning(link, "DHCP error: no address: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_dhcp_lease_get_netmask(lease, &netmask);
        if (r < 0) {
                log_link_warning(link, "DHCP error: no netmask: %s",
                                 strerror(-r));
                return r;
        }

        prefixlen = in_addr_netmask_to_prefixlen(&netmask);

        r = sd_dhcp_lease_get_router(lease, &gateway);
        if (r < 0 && r != -ENOENT) {
                log_link_warning(link, "DHCP error: could not get gateway: %s",
                                 strerror(-r));
                return r;
        }

        if (r >= 0)
                log_link_struct(link, LOG_INFO,
                                "MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
                                 IFNAMSIZ,
                                 link->ifname,
                                 ADDRESS_FMT_VAL(address),
                                 prefixlen,
                                 ADDRESS_FMT_VAL(gateway),
                                 "ADDRESS=%u.%u.%u.%u",
                                 ADDRESS_FMT_VAL(address),
                                 "PREFIXLEN=%u",
                                 prefixlen,
                                 "GATEWAY=%u.%u.%u.%u",
                                 ADDRESS_FMT_VAL(gateway),
                                 NULL);
        else
                log_link_struct(link, LOG_INFO,
                                "MESSAGE=%-*s: DHCPv4 address %u.%u.%u.%u/%u",
                                 IFNAMSIZ,
                                 link->ifname,
                                 ADDRESS_FMT_VAL(address),
                                 prefixlen,
                                 "ADDRESS=%u.%u.%u.%u",
                                 ADDRESS_FMT_VAL(address),
                                 "PREFIXLEN=%u",
                                 prefixlen,
                                 NULL);

        link->dhcp_lease = lease;

        if (link->network->dhcp_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(lease, &mtu);
                if (r >= 0) {
                        r = link_set_mtu(link, mtu);
                        if (r < 0)
                                log_link_error(link, "Failed to set MTU "
                                               "to %" PRIu16, mtu);
                }
        }

        if (link->network->dhcp_hostname) {
                const char *hostname;

                r = sd_dhcp_lease_get_hostname(lease, &hostname);
                if (r >= 0) {
                        r = link_set_hostname(link, hostname);
                        if (r < 0)
                                log_link_error(link,
                                               "Failed to set transient hostname to '%s'",
                                               hostname);
                }
        }

        if (!link->network->dhcp_critical) {
                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
                                               &lifetime);
                if (r < 0) {
                        log_link_warning(link,
                                         "DHCP error: no lifetime: %s",
                                         strerror(-r));
                        return r;
                }
        }

        r = dhcp4_update_address(link, &address, &netmask, lifetime);
        if (r < 0) {
                log_link_warning(link, "could not update IP address: %s",
                                 strerror(-r));
                link_enter_failed(link);
                return r;
        }

        return 0;
}
コード例 #23
0
ファイル: networkd-dhcp4.c プロジェクト: embe/systemd
static int link_set_dhcp_routes(Link *link) {
        struct in_addr gateway, address;
        _cleanup_free_ sd_dhcp_route **static_routes = NULL;
        int r, n, i;

        assert(link);
        assert(link->dhcp_lease);
        assert(link->network);

        if (!link->network->dhcp_use_routes)
                return 0;

        r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
        if (r < 0)
                return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");

        r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
        if (r < 0 && r != -ENODATA)
                return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");

        if (r >= 0) {
                _cleanup_route_free_ Route *route = NULL;
                _cleanup_route_free_ Route *route_gw = NULL;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->protocol = RTPROT_DHCP;

                r = route_new(&route_gw);
                if (r < 0)
                        return log_link_error_errno(link, r,  "Could not allocate route: %m");

                /* The dhcp netmask may mask out the gateway. Add an explicit
                 * route for the gw host so that we can route no matter the
                 * netmask or existing kernel route tables. */
                route_gw->family = AF_INET;
                route_gw->dst.in = gateway;
                route_gw->dst_prefixlen = 32;
                route_gw->prefsrc.in = address;
                route_gw->scope = RT_SCOPE_LINK;
                route_gw->protocol = RTPROT_DHCP;
                route_gw->priority = link->network->dhcp_route_metric;
                route_gw->table = link->network->dhcp_route_table;

                r = route_configure(route_gw, link, dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;

                route->family = AF_INET;
                route->gw.in = gateway;
                route->prefsrc.in = address;
                route->priority = link->network->dhcp_route_metric;
                route->table = link->network->dhcp_route_table;

                r = route_configure(route, link, dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning_errno(link, r, "Could not set routes: %m");
                        link_enter_failed(link);
                        return r;
                }

                link->dhcp4_messages++;
        }

        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
        if (n == -ENODATA)
                return 0;
        if (n < 0)
                return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m");

        for (i = 0; i < n; i++) {
                _cleanup_route_free_ Route *route = NULL;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->family = AF_INET;
                route->protocol = RTPROT_DHCP;
                assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
                assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
                assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
                route->priority = link->network->dhcp_route_metric;
                route->table = link->network->dhcp_route_table;
                route->scope = route_scope_from_address(route, &address);

                r = route_configure(route, link, dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;
        }

        return 0;
}
コード例 #24
0
ファイル: networkd-dhcp4.c プロジェクト: NgoHuy/systemd
static int link_set_dhcp_routes(Link *link) {
        struct in_addr gateway;
        struct sd_dhcp_route *static_routes;
        int r, n, i;

        assert(link);
        assert(link->dhcp_lease);

        r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
        if (r < 0 && r != -ENOENT) {
                log_link_warning(link,
                                 "DHCP error: could not get gateway: %s",
                                 strerror(-r));
                return r;
        }
        if (r >= 0) {
                struct in_addr address;
                _cleanup_route_free_ Route *route = NULL;
                _cleanup_route_free_ Route *route_gw = NULL;

                r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
                if (r < 0) {
                        log_link_warning(link,
                                         "DHCP error: could not get address: %s",
                                         strerror(-r));
                        return r;
                }

                r = route_new_dynamic(&route, RTPROT_DHCP);
                if (r < 0) {
                        log_link_error(link,
                                       "Could not allocate route: %s",
                                       strerror(-r));
                        return r;
                }

                r = route_new_dynamic(&route_gw, RTPROT_DHCP);
                if (r < 0) {
                log_link_error(link,
                               "Could not allocate route: %s",
                               strerror(-r));
                               return r;
                }

                /* The dhcp netmask may mask out the gateway. Add an explicit
                 * route for the gw host so that we can route no matter the
                 * netmask or existing kernel route tables. */
                route_gw->family = AF_INET;
                route_gw->dst_addr.in = gateway;
                route_gw->dst_prefixlen = 32;
                route_gw->prefsrc_addr.in = address;
                route_gw->scope = RT_SCOPE_LINK;
                route_gw->metrics = link->network->dhcp_route_metric;

                r = route_configure(route_gw, link, &dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning(link,
                                         "could not set host route: %s",
                                         strerror(-r));
                        return r;
                }

                link->dhcp4_messages ++;

                route->family = AF_INET;
                route->in_addr.in = gateway;
                route->prefsrc_addr.in = address;
                route->metrics = link->network->dhcp_route_metric;

                r = route_configure(route, link, &dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning(link,
                                         "could not set routes: %s",
                                         strerror(-r));
                        link_enter_failed(link);
                        return r;
                }

                link->dhcp4_messages ++;
        }

        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
        if (n == -ENOENT)
                return 0;
        if (n < 0) {
                log_link_warning(link,
                                 "DHCP error: could not get routes: %s",
                                 strerror(-n));

                return n;
        }

        for (i = 0; i < n; i++) {
                _cleanup_route_free_ Route *route = NULL;

                r = route_new_dynamic(&route, RTPROT_DHCP);
                if (r < 0) {
                        log_link_error(link, "Could not allocate route: %s",
                                       strerror(-r));
                        return r;
                }

                route->family = AF_INET;
                route->in_addr.in = static_routes[i].gw_addr;
                route->dst_addr.in = static_routes[i].dst_addr;
                route->dst_prefixlen = static_routes[i].dst_prefixlen;
                route->metrics = link->network->dhcp_route_metric;

                r = route_configure(route, link, &dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning(link,
                                         "could not set host route: %s",
                                         strerror(-r));
                        return r;
                }

                link->dhcp4_messages ++;
        }

        return 0;
}
コード例 #25
0
ファイル: networkd-dhcp4.c プロジェクト: msekletar/systemd
static int link_set_dhcp_routes(Link *link) {
        _cleanup_free_ sd_dhcp_route **static_routes = NULL;
        bool classless_route = false, static_route = false;
        const struct in_addr *router;
        struct in_addr address;
        int r, n, i;
        uint32_t table;

        assert(link);

        if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */
                return 0;

        if (!link->network) /* link went down while we configured the IP addresses? */
                return 0;

        if (!link->network->dhcp_use_routes)
                return 0;

        table = link_get_dhcp_route_table(link);

        r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
        if (r < 0)
                return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");

        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
        if (n == -ENODATA)
                log_link_debug_errno(link, n, "DHCP: No routes received from DHCP server: %m");
        else if (n < 0)
                log_link_debug_errno(link, n, "DHCP error: could not get routes: %m");

        for (i = 0; i < n; i++) {
                switch (sd_dhcp_route_get_option(static_routes[i])) {
                case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
                        classless_route = true;
                        break;
                case SD_DHCP_OPTION_STATIC_ROUTE:
                        static_route = true;
                        break;
                }
        }

        for (i = 0; i < n; i++) {
                _cleanup_(route_freep) Route *route = NULL;

                /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option,
                   the DHCP client MUST ignore the Static Routes option. */
                if (classless_route &&
                    sd_dhcp_route_get_option(static_routes[i]) != SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE)
                        continue;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->family = AF_INET;
                route->protocol = RTPROT_DHCP;
                assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
                assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
                assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
                route->priority = link->network->dhcp_route_metric;
                route->table = table;
                route->scope = route_scope_from_address(route, &address);

                r = route_configure(route, link, dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;
        }

        r = sd_dhcp_lease_get_router(link->dhcp_lease, &router);
        if (IN_SET(r, 0, -ENODATA))
                log_link_info(link, "DHCP: No gateway received from DHCP server.");
        else if (r < 0)
                log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
        else if (in4_addr_is_null(&router[0]))
                log_link_info(link, "DHCP: Received gateway is null.");

        /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and
           a Router option, the DHCP client MUST ignore the Router option. */
        if (classless_route && static_route)
                log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option");

        if (r > 0 && !classless_route && !in4_addr_is_null(&router[0])) {
                _cleanup_(route_freep) Route *route = NULL, *route_gw = NULL;

                r = route_new(&route_gw);
                if (r < 0)
                        return log_link_error_errno(link, r,  "Could not allocate route: %m");

                /* The dhcp netmask may mask out the gateway. Add an explicit
                 * route for the gw host so that we can route no matter the
                 * netmask or existing kernel route tables. */
                route_gw->family = AF_INET;
                route_gw->dst.in = router[0];
                route_gw->dst_prefixlen = 32;
                route_gw->prefsrc.in = address;
                route_gw->scope = RT_SCOPE_LINK;
                route_gw->protocol = RTPROT_DHCP;
                route_gw->priority = link->network->dhcp_route_metric;
                route_gw->table = table;

                r = route_configure(route_gw, link, dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->family = AF_INET;
                route->gw.in = router[0];
                route->prefsrc.in = address;
                route->protocol = RTPROT_DHCP;
                route->priority = link->network->dhcp_route_metric;
                route->table = table;

                r = route_configure(route, link, dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning_errno(link, r, "Could not set routes: %m");
                        link_enter_failed(link);
                        return r;
                }

                link->dhcp4_messages++;
        }

        return 0;
}
コード例 #26
0
ファイル: networkd-dhcp4.c プロジェクト: NgoHuy/systemd
static int dhcp_lease_lost(Link *link) {
        _cleanup_address_free_ Address *address = NULL;
        struct in_addr addr;
        struct in_addr netmask;
        struct in_addr gateway;
        unsigned prefixlen = 0;
        int r;

        assert(link);
        assert(link->dhcp_lease);

        log_link_warning(link, "DHCP lease lost");

        if (link->network->dhcp_routes) {
                struct sd_dhcp_route *routes;
                int n, i;

                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
                if (n >= 0) {
                        for (i = 0; i < n; i++) {
                                _cleanup_route_free_ Route *route = NULL;

                                r = route_new_dynamic(&route, RTPROT_UNSPEC);
                                if (r >= 0) {
                                        route->family = AF_INET;
                                        route->in_addr.in = routes[i].gw_addr;
                                        route->dst_addr.in = routes[i].dst_addr;
                                        route->dst_prefixlen = routes[i].dst_prefixlen;

                                        route_drop(route, link,
                                                   &link_route_drop_handler);
                                }
                        }
                }
        }

        r = address_new_dynamic(&address);
        if (r >= 0) {
                r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
                if (r >= 0) {
                        _cleanup_route_free_ Route *route_gw = NULL;
                        _cleanup_route_free_ Route *route = NULL;

                        r = route_new_dynamic(&route_gw, RTPROT_UNSPEC);
                        if (r >= 0) {
                                route_gw->family = AF_INET;
                                route_gw->dst_addr.in = gateway;
                                route_gw->dst_prefixlen = 32;
                                route_gw->scope = RT_SCOPE_LINK;

                                route_drop(route_gw, link,
                                           &link_route_drop_handler);
                        }

                        r = route_new_dynamic(&route, RTPROT_UNSPEC);
                        if (r >= 0) {
                                route->family = AF_INET;
                                route->in_addr.in = gateway;

                                route_drop(route, link,
                                           &link_route_drop_handler);
                        }
                }

                r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
                if (r >= 0) {
                        r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
                        if (r >= 0)
                                prefixlen = in_addr_netmask_to_prefixlen(&netmask);

                        address->family = AF_INET;
                        address->in_addr.in = addr;
                        address->prefixlen = prefixlen;

                        address_drop(address, link, &link_address_drop_handler);
                }
        }

        if (link->network->dhcp_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
                if (r >= 0 && link->original_mtu != mtu) {
                        r = link_set_mtu(link, link->original_mtu);
                        if (r < 0) {
                                log_link_warning(link,
                                                 "DHCP error: could not reset MTU");
                                link_enter_failed(link);
                                return r;
                        }
                }
        }

        if (link->network->dhcp_hostname) {
                const char *hostname = NULL;

                if (!link->network->hostname)
                        r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
                else
                        hostname = link->network->hostname;

                if (r >= 0 || hostname) {
                        r = link_set_hostname(link, hostname);
                        if (r < 0)
                                log_link_error_errno(link, r,
                                                     "Failed to set transient hostname to '%s': %m",
                                                     hostname);

                }
        }

        link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
        link->dhcp4_configured = false;

        return 0;
}
コード例 #27
0
ファイル: networkd-dhcp4.c プロジェクト: msekletar/systemd
static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
        const struct in_addr *router;
        sd_dhcp_lease *lease;
        struct in_addr address;
        struct in_addr netmask;
        unsigned prefixlen;
        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
        int r;

        assert(client);
        assert(link);

        r = sd_dhcp_client_get_lease(client, &lease);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No lease: %m");

        r = sd_dhcp_lease_get_address(lease, &address);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No address: %m");

        r = sd_dhcp_lease_get_netmask(lease, &netmask);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No netmask: %m");

        prefixlen = in4_addr_netmask_to_prefixlen(&netmask);

        r = sd_dhcp_lease_get_router(lease, &router);
        if (r < 0 && r != -ENODATA)
                return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");

        if (r > 0 && !in4_addr_is_null(&router[0]))
                log_struct(LOG_INFO,
                           LOG_LINK_INTERFACE(link),
                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
                                            ADDRESS_FMT_VAL(address),
                                            prefixlen,
                                            ADDRESS_FMT_VAL(router[0])),
                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
                           "PREFIXLEN=%u", prefixlen,
                           "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(router[0]));
        else
                log_struct(LOG_INFO,
                           LOG_LINK_INTERFACE(link),
                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
                                            ADDRESS_FMT_VAL(address),
                                            prefixlen),
                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
                           "PREFIXLEN=%u", prefixlen);

        link->dhcp_lease = sd_dhcp_lease_ref(lease);
        link_dirty(link);

        if (link->network->dhcp_use_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(lease, &mtu);
                if (r >= 0) {
                        r = link_set_mtu(link, mtu, true);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
                }
        }

        if (link->network->dhcp_use_hostname) {
                const char *dhcpname = NULL;
                _cleanup_free_ char *hostname = NULL;

                if (link->network->dhcp_hostname)
                        dhcpname = link->network->dhcp_hostname;
                else
                        (void) sd_dhcp_lease_get_hostname(lease, &dhcpname);

                if (dhcpname) {
                        r = shorten_overlong(dhcpname, &hostname);
                        if (r < 0)
                                log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname);
                        if (r == 1)
                                log_link_notice(link, "Overlong DHCP hostname received, shortened from '%s' to '%s'", dhcpname, hostname);
                }

                if (hostname) {
                        r = manager_set_hostname(link->manager, hostname);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
                }
        }

        if (link->network->dhcp_use_timezone) {
                const char *tz = NULL;

                (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);

                if (tz) {
                        r = manager_set_timezone(link->manager, tz);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
                }
        }

        if (!link->network->dhcp_critical) {
                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
                if (r < 0)
                        return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
        }

        r = dhcp4_update_address(link, &address, &netmask, lifetime);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not update IP address: %m");
                link_enter_failed(link);
                return r;
        }

        return 0;
}
コード例 #28
0
ファイル: networkd-dhcp4.c プロジェクト: davide125/systemd
static int link_set_dhcp_routes(Link *link) {
        _cleanup_free_ sd_dhcp_route **static_routes = NULL;
        bool classless_route = false, static_route = false;
        struct in_addr gateway, address;
        int r, n, i;
        uint32_t table;

        assert(link);

        if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */
                return 0;

        if (!link->network) /* link went down while we configured the IP addresses? */
                return 0;

        if (!link->network->dhcp_use_routes)
                return 0;

        /* When the interface is part of an VRF use the VRFs routing table, unless
         * there is a another table specified. */
        table = link->network->dhcp_route_table;
        if (!link->network->dhcp_route_table_set && link->network->vrf != NULL)
                table = VRF(link->network->vrf)->table;

        r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
        if (r < 0)
                return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");

        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
        if (n < 0)
                log_link_debug_errno(link, n, "DHCP error: could not get routes: %m");

        for (i = 0; i < n; i++) {
                if (static_routes[i]->option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE)
                        classless_route = true;

                if (static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE)
                        static_route = true;
        }

        for (i = 0; i < n; i++) {
                _cleanup_route_free_ Route *route = NULL;

                /* if the DHCP server returns both a Classless Static Routes option and a Static Routes option,
                   the DHCP client MUST ignore the Static Routes option. */
                if (classless_route && static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE)
                        continue;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->family = AF_INET;
                route->protocol = RTPROT_DHCP;
                assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
                assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
                assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
                route->priority = link->network->dhcp_route_metric;
                route->table = table;
                route->scope = route_scope_from_address(route, &address);

                r = route_configure(route, link, dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;
        }

        r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
        if (r == -ENODATA)
                log_link_info_errno(link, r, "DHCP: No routes received from DHCP server: %m");
        else if (r < 0)
                log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");

        /* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and
           a Router option, the DHCP client MUST ignore the Router option. */
        if (classless_route && static_route)
                log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option");

        if (r >= 0 && !classless_route) {
                _cleanup_route_free_ Route *route = NULL;
                _cleanup_route_free_ Route *route_gw = NULL;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->protocol = RTPROT_DHCP;

                r = route_new(&route_gw);
                if (r < 0)
                        return log_link_error_errno(link, r,  "Could not allocate route: %m");

                /* The dhcp netmask may mask out the gateway. Add an explicit
                 * route for the gw host so that we can route no matter the
                 * netmask or existing kernel route tables. */
                route_gw->family = AF_INET;
                route_gw->dst.in = gateway;
                route_gw->dst_prefixlen = 32;
                route_gw->prefsrc.in = address;
                route_gw->scope = RT_SCOPE_LINK;
                route_gw->protocol = RTPROT_DHCP;
                route_gw->priority = link->network->dhcp_route_metric;
                route_gw->table = table;

                r = route_configure(route_gw, link, dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;

                route->family = AF_INET;
                route->gw.in = gateway;
                route->prefsrc.in = address;
                route->priority = link->network->dhcp_route_metric;
                route->table = table;

                r = route_configure(route, link, dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning_errno(link, r, "Could not set routes: %m");
                        link_enter_failed(link);
                        return r;
                }

                link->dhcp4_messages++;
        }

        return 0;
}