--- /dev/null
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/**
+ * $Id$
+ * @file proto_dhcpv4.c
+ * @brief DHCPV4 master protocol handler.
+ *
+ * @copyright 2017 Arran Cudbard-Bell (a.cudbardb@freedhcpv4.org)
+ * @copyright 2016 Alan DeKok (aland@freedhcpv4.org)
+ */
+#include <freeradius-devel/radiusd.h>
+#include <freeradius-devel/dhcpv4/dhcpv4.h>
+#include <freeradius-devel/io/listen.h>
+#include <freeradius-devel/modules.h>
+#include <freeradius-devel/unlang.h>
+#include <freeradius-devel/rad_assert.h>
+#include "proto_dhcpv4.h"
+
+extern fr_app_t proto_dhcpv4;
+static int type_parse(TALLOC_CTX *ctx, void *out, CONF_ITEM *ci, CONF_PARSER const *rule);
+static int transport_parse(TALLOC_CTX *ctx, void *out, CONF_ITEM *ci, CONF_PARSER const *rule);
+
+static CONF_PARSER const limit_config[] = {
+ { FR_CONF_OFFSET("idle_timeout", FR_TYPE_TIMEVAL, proto_dhcpv4_t, io.idle_timeout), .dflt = "30.0" } ,
+ { FR_CONF_OFFSET("nak_lifetime", FR_TYPE_TIMEVAL, proto_dhcpv4_t, io.nak_lifetime), .dflt = "30.0" } ,
+
+ { FR_CONF_OFFSET("max_connections", FR_TYPE_UINT32, proto_dhcpv4_t, io.max_connections), .dflt = "1024" } ,
+ { FR_CONF_OFFSET("max_clients", FR_TYPE_UINT32, proto_dhcpv4_t, io.max_clients), .dflt = "256" } ,
+ { FR_CONF_OFFSET("max_pending_packets", FR_TYPE_UINT32, proto_dhcpv4_t, io.max_pending_packets), .dflt = "256" } ,
+
+ /*
+ * For performance tweaking. NOT for normal humans.
+ */
+ { FR_CONF_OFFSET("max_packet_size", FR_TYPE_UINT32, proto_dhcpv4_t, max_packet_size) } ,
+ { FR_CONF_OFFSET("num_messages", FR_TYPE_UINT32, proto_dhcpv4_t, num_messages) } ,
+
+ CONF_PARSER_TERMINATOR
+};
+
+/** How to parse a DHCPV4 listen section
+ *
+ */
+static CONF_PARSER const proto_dhcpv4_config[] = {
+ { FR_CONF_OFFSET("type", FR_TYPE_VOID | FR_TYPE_MULTI | FR_TYPE_NOT_EMPTY, proto_dhcpv4_t,
+ type_submodule), .func = type_parse },
+ { FR_CONF_OFFSET("transport", FR_TYPE_VOID, proto_dhcpv4_t, io.submodule),
+ .func = transport_parse },
+
+ /*
+ * Check whether or not the *trailing* bits of a
+ * Tunnel-Password are zero, as they should be.
+ */
+ { FR_CONF_OFFSET("tunnel_password_zeros", FR_TYPE_BOOL, proto_dhcpv4_t, tunnel_password_zeros) } ,
+
+ { FR_CONF_POINTER("limit", FR_TYPE_SUBSECTION, NULL), .subcs = (void const *) limit_config },
+
+ CONF_PARSER_TERMINATOR
+};
+
+
+static fr_dict_t const *dict_dhcpv4;
+
+extern fr_dict_autoload_t proto_dhcpv4_dict[];
+fr_dict_autoload_t proto_dhcpv4_dict[] = {
+ { .out = &dict_dhcpv4, .proto = "dhcpv4" },
+ { NULL }
+};
+
+static fr_dict_attr_t const *attr_dhcpv4_message_type;
+
+extern fr_dict_attr_autoload_t proto_dhcpv4_dict_attr[];
+fr_dict_attr_autoload_t proto_dhcpv4_dict_attr[] = {
+ { .out = &attr_dhcpv4_message_type, .name = "DHCP-Message-Type", .type = FR_TYPE_UINT8, .dict = &dict_dhcpv4},
+ { NULL }
+};
+
+/*
+ * Allow configurable priorities for each listener.
+ */
+static uint32_t priorities[FR_DHCP_MAX] = {
+ [FR_DHCP_DISCOVER] = PRIORITY_NORMAL,
+ [FR_DHCP_REQUEST] = PRIORITY_NORMAL,
+ [FR_DHCP_DECLINE] = PRIORITY_NORMAL,
+ [FR_DHCP_RELEASE] = PRIORITY_NORMAL,
+ [FR_DHCP_INFORM] = PRIORITY_NORMAL,
+ [FR_DHCP_LEASE_QUERY] = PRIORITY_LOW,
+ [FR_DHCP_BULK_LEASE_QUERY] = PRIORITY_LOW,
+};
+
+
+static const CONF_PARSER priority_config[] = {
+ { FR_CONF_OFFSET("DHCP-Discover", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_DISCOVER]),
+ .dflt = STRINGIFY(PRIORITY_NORMAL) },
+ { FR_CONF_OFFSET("DHCP-Request", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_REQUEST]),
+ .dflt = STRINGIFY(PRIORITY_NORMAL) },
+ { FR_CONF_OFFSET("DHCP-Decline", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_DECLINE]),
+ .dflt = STRINGIFY(PRIORITY_NORMAL) },
+ { FR_CONF_OFFSET("DHCP-Release", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_RELEASE]),
+ .dflt = STRINGIFY(PRIORITY_NORMAL) },
+ { FR_CONF_OFFSET("DHCP-Inform", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_INFORM]),
+ .dflt = STRINGIFY(PRIORITY_NORMAL) },
+ { FR_CONF_OFFSET("DHCP-Lease-Query", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_LEASE_QUERY]),
+ .dflt = STRINGIFY(PRIORITY_LOW) },
+ { FR_CONF_OFFSET("DHCP-Bulk-Lease-Query", FR_TYPE_UINT32, proto_dhcpv4_t, priorities[FR_DHCP_BULK_LEASE_QUERY]),
+ .dflt = STRINGIFY(PRIORITY_LOW) },
+ CONF_PARSER_TERMINATOR
+};
+
+
+/** Wrapper around dl_instance which translates the packet-type into a submodule name
+ *
+ * @param[in] ctx to allocate data in (instance of proto_dhcpv4).
+ * @param[out] out Where to write a dl_instance_t containing the module handle and instance.
+ * @param[in] ci #CONF_PAIR specifying the name of the type module.
+ * @param[in] rule unused.
+ * @return
+ * - 0 on success.
+ * - -1 on failure.
+ */
+static int type_parse(TALLOC_CTX *ctx, void *out, CONF_ITEM *ci, UNUSED CONF_PARSER const *rule)
+{
+ char const *type_str = cf_pair_value(cf_item_to_pair(ci));
+ CONF_SECTION *listen_cs = cf_item_to_section(cf_parent(ci));
+ CONF_SECTION *server = cf_item_to_section(cf_parent(listen_cs));
+ proto_dhcpv4_t *inst;
+ dl_instance_t *parent_inst;
+ fr_dict_enum_t const *type_enum;
+ uint32_t code;
+
+ rad_assert(listen_cs && (strcmp(cf_section_name1(listen_cs), "listen") == 0));
+
+ /*
+ * Allow the process module to be specified by
+ * packet type.
+ */
+ type_enum = fr_dict_enum_by_alias(attr_dhcpv4_message_type, type_str);
+ if (!type_enum) {
+ cf_log_err(ci, "Invalid type \"%s\"", type_str);
+ return -1;
+ }
+
+ cf_data_add(ci, type_enum, NULL, false);
+
+ code = type_enum->value->vb_uint32;
+ if (!code || (code >= FR_DHCP_MAX)) {
+ cf_log_err(ci, "Unsupported 'type = %s'", type_str);
+ return -1;
+ }
+
+ if (!priorities[code]) {
+ cf_log_err(ci, "Cannot listen for 'type = %s'. The packet MUST be a request.", type_str);
+ return -1;
+ }
+
+ /*
+ * Setting 'type = foo' means you MUST have at least a
+ * 'recv foo' section.
+ */
+ if (!cf_section_find(server, "recv", type_enum->alias)) {
+ cf_log_err(ci, "Failed finding 'recv %s {...} section of virtual server %s",
+ type_enum->alias, cf_section_name2(server));
+ return -1;
+ }
+
+ parent_inst = cf_data_value(cf_data_find(listen_cs, dl_instance_t, "proto_dhcpv4"));
+ rad_assert(parent_inst);
+
+ /*
+ * Set the allowed codes so that we can compile them as
+ * necessary.
+ */
+ inst = talloc_get_type_abort(parent_inst->data, proto_dhcpv4_t);
+ inst->code_allowed[code] = true;
+
+ /*
+ * Parent dl_instance_t added in virtual_servers.c (listen_parse)
+ */
+ return dl_instance(ctx, out, listen_cs, parent_inst, "all", DL_TYPE_SUBMODULE);
+}
+
+/** Wrapper around dl_instance
+ *
+ * @param[in] ctx to allocate data in (instance of proto_dhcpv4).
+ * @param[out] out Where to write a dl_instance_t containing the module handle and instance.
+ * @param[in] ci #CONF_PAIR specifying the name of the type module.
+ * @param[in] rule unused.
+ * @return
+ * - 0 on success.
+ * - -1 on failure.
+ */
+static int transport_parse(TALLOC_CTX *ctx, void *out, CONF_ITEM *ci, UNUSED CONF_PARSER const *rule)
+{
+ char const *name = cf_pair_value(cf_item_to_pair(ci));
+ dl_instance_t *parent_inst;
+ proto_dhcpv4_t *inst;
+ CONF_SECTION *listen_cs = cf_item_to_section(cf_parent(ci));
+ CONF_SECTION *transport_cs;
+
+ transport_cs = cf_section_find(listen_cs, name, NULL);
+
+ /*
+ * Allocate an empty section if one doesn't exist
+ * this is so defaults get parsed.
+ */
+ if (!transport_cs) transport_cs = cf_section_alloc(listen_cs, listen_cs, name, NULL);
+
+ parent_inst = cf_data_value(cf_data_find(listen_cs, dl_instance_t, "proto_dhcpv4"));
+ rad_assert(parent_inst);
+
+ /*
+ * Set the allowed codes so that we can compile them as
+ * necessary.
+ */
+ inst = talloc_get_type_abort(parent_inst->data, proto_dhcpv4_t);
+ inst->io.transport = name;
+
+ return dl_instance(ctx, out, transport_cs, parent_inst, name, DL_TYPE_SUBMODULE);
+}
+
+/** Decode the packet
+ *
+ */
+static int mod_decode(UNUSED void const *instance, UNUSED REQUEST *request, UNUSED uint8_t *const data, UNUSED size_t data_len)
+{
+#if 1
+ rad_assert(0 == 1);
+#else
+ proto_dhcpv4_t const *inst = talloc_get_type_abort_const(instance, proto_dhcpv4_t);
+ fr_io_track_t const *track = talloc_get_type_abort_const(request->async->packet_ctx, fr_io_track_t);
+ fr_io_address_t *address = track->address;
+ RADCLIENT const *client;
+
+ rad_assert(data[0] < FR_MAX_PACKET_CODE);
+
+ if (DEBUG_ENABLED3) {
+ RDEBUG("proto_dhcpv4 decode packet");
+ fr_dhcpv4_print_hex(fr_log_fp, data, data_len);
+ }
+
+ client = address->radclient;
+
+ /*
+ * Hacks for now until we have a lower-level decode routine.
+ */
+ request->packet->code = data[0];
+ request->packet->id = data[1];
+ request->reply->id = data[1];
+ memcpy(request->packet->vector, data + 4, sizeof(request->packet->vector));
+
+ request->packet->data = talloc_memdup(request->packet, data, data_len);
+ request->packet->data_len = data_len;
+
+ /*
+ * Note that we don't set a limit on max_attributes here.
+ * That MUST be set and checked in the underlying
+ * transport, via a call to fr_dhcpv4_ok().
+ */
+ if (fr_dhcpv4_packet_decode(request->packet, NULL, 0,
+ inst->tunnel_password_zeros, client->secret) < 0) {
+ RPEDEBUG("Failed decoding packet");
+ return -1;
+ }
+
+ /*
+ * Set the rest of the fields.
+ */
+ memcpy(&request->client, &client, sizeof(client)); /* const issues */
+
+ request->packet->if_index = address->if_index;
+ request->packet->src_ipaddr = address->src_ipaddr;
+ request->packet->src_port = address->src_port;
+ request->packet->dst_ipaddr = address->dst_ipaddr;
+ request->packet->dst_port = address->dst_port;
+
+ request->reply->if_index = address->if_index;
+ request->reply->src_ipaddr = address->dst_ipaddr;
+ request->reply->src_port = address->dst_port;
+ request->reply->dst_ipaddr = address->src_ipaddr;
+ request->reply->dst_port = address->src_port;
+
+ request->root = &main_config;
+ REQUEST_VERIFY(request);
+
+ if (!inst->io.app_io->decode) return 0;
+
+ /*
+ * Let the app_io do anything it needs to do.
+ */
+ return inst->io.app_io->decode(inst->io.app_io_instance, request, data, data_len);
+#endif
+}
+
+static ssize_t mod_encode(UNUSED void const *instance, UNUSED REQUEST *request, UNUSED uint8_t *buffer, UNUSED size_t buffer_len)
+{
+#if 1
+ rad_assert(0 == 1);
+#else
+ proto_dhcpv4_t const *inst = talloc_get_type_abort_const(instance, proto_dhcpv4_t);
+ fr_io_track_t const *track = talloc_get_type_abort_const(request->async->packet_ctx, fr_io_track_t);
+ fr_io_address_t *address = track->address;
+ ssize_t data_len;
+ RADCLIENT const *client;
+
+ /*
+ * The packet timed out. Tell the network side that the packet is dead.
+ */
+ if (buffer_len == 1) {
+ *buffer = true;
+ return 1;
+ }
+
+ /*
+ * "Do not respond"
+ */
+ if ((request->reply->code == FR_DHCP_MESSAGE_TYPE_VALUE_DHCP_DO_NOT_RESPOND) ||
+ (request->reply->code == 0) || (request->reply->code >= FR_DHCP_MAX)) {
+ *buffer = false;
+ return 1;
+ }
+
+ client = address->radclient;
+ rad_assert(client);
+
+ /*
+ * Dynamic client stuff
+ */
+ if (client->dynamic && !client->active) {
+ RADCLIENT *new_client;
+
+ rad_assert(buffer_len >= sizeof(client));
+
+ /*
+ * Allocate the client. If that fails, send back a NAK.
+ *
+ * @todo - deal with NUMA zones? Or just deal with this
+ * client being in different memory.
+ *
+ * Maybe we should create a CONF_SECTION from the client,
+ * and pass *that* back to mod_write(), which can then
+ * parse it to create the actual client....
+ */
+ new_client = client_afrom_request(NULL, request);
+ if (!new_client) {
+ PERROR("Failed creating new client");
+ buffer[0] = true;
+ return 1;
+ }
+
+ memcpy(buffer, &new_client, sizeof(new_client));
+ return sizeof(new_client);
+ }
+
+ /*
+ * If the app_io encodes the packet, then we don't need
+ * to do that.
+ */
+ if (inst->io.app_io->encode) {
+ data_len = inst->io.app_io->encode(inst->io.app_io_instance, request, buffer, buffer_len);
+ if (data_len > 0) return data_len;
+ }
+
+#ifdef WITH_UDPFROMTO
+ /*
+ * Overwrite the src ip address on the outbound packet
+ * with the one specified by the client. This is useful
+ * to work around broken DSR implementations and other
+ * routing issues.
+ */
+ if (client->src_ipaddr.af != AF_UNSPEC) {
+ request->reply->src_ipaddr = client->src_ipaddr;
+ }
+#endif
+
+ data_len = fr_dhcpv4_encode(buffer, buffer_len, request->packet->data,
+ client->secret, talloc_array_length(client->secret) - 1,
+ request->reply->code, request->reply->id, request->reply->vps);
+ if (data_len < 0) {
+ RPEDEBUG("Failed encoding DHCPV4 reply");
+ return -1;
+ }
+
+ if (fr_dhcpv4_sign(buffer, request->packet->data,
+ (uint8_t const *) client->secret, talloc_array_length(client->secret) - 1) < 0) {
+ RPEDEBUG("Failed signing DHCPV4 reply");
+ return -1;
+ }
+
+ if (DEBUG_ENABLED3) {
+ RDEBUG("proto_dhcpv4 encode packet");
+ fr_dhcpv4_print_hex(fr_log_fp, buffer, data_len);
+ }
+
+ return data_len;
+#endif
+}
+
+static void mod_process_set(void const *instance, REQUEST *request)
+{
+ proto_dhcpv4_t const *inst = talloc_get_type_abort_const(instance, proto_dhcpv4_t);
+ fr_io_process_t process;
+ fr_io_track_t *track = request->async->packet_ctx;
+
+ rad_assert(request->packet->code != 0);
+ rad_assert(request->packet->code < FR_DHCP_MAX);
+
+ request->server_cs = inst->io.server_cs;
+
+ /*
+ * 'track' can be NULL when there's no network listener.
+ */
+ if (inst->io.app_io && (track->dynamic == request->async->recv_time)) {
+ fr_app_process_t const *app_process;
+
+ app_process = (fr_app_process_t const *) inst->dynamic_submodule->module->common;
+
+ request->async->process = app_process->process;
+ track->dynamic = 0;
+ return;
+ }
+
+ process = inst->process_by_code[request->packet->code];
+ if (!process) {
+ REDEBUG("proto_dhcpv4 - No module available to handle packet code %i", request->packet->code);
+ return;
+ }
+
+ request->async->process = process;
+}
+
+
+static int mod_priority(void const *instance, uint8_t const *buffer, UNUSED size_t buflen)
+{
+ proto_dhcpv4_t const *inst = talloc_get_type_abort_const(instance, proto_dhcpv4_t);
+
+ rad_assert(buffer[0] > 0);
+ rad_assert(buffer[0] < FR_MAX_PACKET_CODE);
+
+ /*
+ * Disallowed packet
+ */
+ if (!inst->priorities[buffer[0]]) return 0;
+
+ if (!inst->process_by_code[buffer[0]]) return -1;
+
+ /*
+ * @todo - if we cared, we could also return -1 for "this
+ * is a bad packet". But that's really only for
+ * mod_inject, as we assume that app_io->read() always
+ * returns good packets.
+ */
+
+ /*
+ * Return the configured priority.
+ */
+ return inst->priorities[buffer[0]];
+}
+
+/** Open listen sockets/connect to external event source
+ *
+ * @param[in] instance Ctx data for this application.
+ * @param[in] sc to add our file descriptor to.
+ * @param[in] conf Listen section parsed to give us isntance.
+ * @return
+ * - 0 on success.
+ * - -1 on failure.
+ */
+static int mod_open(void *instance, fr_schedule_t *sc, CONF_SECTION *conf)
+{
+ fr_listen_t *listen;
+ proto_dhcpv4_t *inst = talloc_get_type_abort(instance, proto_dhcpv4_t);
+
+ /*
+ * Build the #fr_listen_t. This describes the complete
+ * path, data takes from the socket to the decoder and
+ * back again.
+ */
+ listen = talloc_zero(inst, fr_listen_t);
+
+ listen->app = &proto_dhcpv4;
+ listen->app_instance = instance;
+ listen->server_cs = inst->io.server_cs;
+
+ /*
+ * Set configurable parameters for message ring buffer.
+ */
+ listen->default_message_size = inst->max_packet_size;
+ listen->num_messages = inst->num_messages;
+
+ /*
+ * Open the socket, and add it to the scheduler.
+ */
+ if (inst->io.app_io) {
+ /*
+ * Set the listener to call our master trampoline function.
+ */
+ listen->app_io = &fr_master_app_io;
+ listen->app_io_instance = inst;
+
+ /*
+ * Don't set the connection for the main socket. It's not connected.
+ */
+ if (inst->io.app_io->open(inst->io.app_io_instance) < 0) {
+ cf_log_err(conf, "Failed opening %s interface", inst->io.app_io->name);
+ talloc_free(listen);
+ return -1;
+ }
+
+ /*
+ * Add the socket to the scheduler, which might
+ * end up in a different thread.
+ */
+ if (!fr_schedule_socket_add(sc, listen)) {
+ talloc_free(listen);
+ return -1;
+ }
+ } else {
+ rad_assert(!inst->io.dynamic_clients);
+ }
+
+ inst->io.listen = listen; /* Probably won't need it, but doesn't hurt */
+ inst->io.sc = sc;
+
+ return 0;
+}
+
+/** Instantiate the application
+ *
+ * Instantiate I/O and type submodules.
+ *
+ * @param[in] instance Ctx data for this application.
+ * @param[in] conf Listen section parsed to give us instance.
+ * @return
+ * - 0 on success.
+ * - -1 on failure.
+ */
+static int mod_instantiate(void *instance, CONF_SECTION *conf)
+{
+ proto_dhcpv4_t *inst = talloc_get_type_abort(instance, proto_dhcpv4_t);
+ size_t i;
+
+ CONF_PAIR *cp = NULL;
+ CONF_ITEM *ci;
+ CONF_SECTION *server = cf_item_to_section(cf_parent(conf));
+
+ /*
+ * Compile each "send/recv + DHCPV4 packet type" section.
+ * This is so that the submodules don't need to do this.
+ */
+ i = 0;
+ for (ci = cf_item_next(server, NULL);
+ ci != NULL;
+ ci = cf_item_next(server, ci)) {
+ fr_dict_enum_t const *dv;
+ char const *name, *packet_type;
+ CONF_SECTION *subcs;
+
+ if (!cf_item_is_section(ci)) continue;
+
+ subcs = cf_item_to_section(ci);
+ name = cf_section_name1(subcs);
+
+ /*
+ * We only process recv/send sections.
+ * proto_dhcpv4_auth will handle the
+ * "authenticate" sections.
+ */
+ if ((strcmp(name, "recv") != 0) &&
+ (strcmp(name, "send") != 0)) {
+ continue;
+ }
+
+ /*
+ * One more "recv" or "send" section has been
+ * found.
+ */
+ i++;
+
+ /*
+ * Skip a section if it was already compiled.
+ */
+ if (cf_data_find(subcs, unlang_group_t, NULL) != NULL) continue;
+
+ /*
+ * Check that the packet type is known.
+ */
+ packet_type = cf_section_name2(subcs);
+ dv = fr_dict_enum_by_alias(attr_dhcpv4_message_type, packet_type);
+ if (!dv || ((dv->value->vb_uint32 > FR_DHCP_MAX) &&
+ (dv->value->vb_uint32 == FR_DHCP_MESSAGE_TYPE_VALUE_DHCP_DO_NOT_RESPOND))) {
+ cf_log_err(subcs, "Invalid DHCPV4 packet type in '%s %s {...}'",
+ name, packet_type);
+ return -1;
+ }
+
+ /*
+ * Skip 'recv foo' when it's a request packet
+ * that isn't used by this instance. Note that
+ * we DO compile things like 'recv
+ * Access-Accept', so that rlm_dhcpv4 can use it.
+ */
+ if ((strcmp(name, "recv") == 0) && (dv->value->vb_uint32 <= FR_DHCP_MAX) &&
+ fr_request_packets[dv->value->vb_uint32] &&
+ !inst->code_allowed[dv->value->vb_uint32]) {
+ cf_log_warn(subcs, "Skipping %s %s { ...}", name, packet_type);
+ continue;
+ }
+
+ /*
+ * Try to compile it, and fail if it doesn't work.
+ */
+ cf_log_debug(subcs, "compiling - %s %s {...}", name, packet_type);
+
+ if (unlang_compile(subcs, MOD_POST_AUTH) < 0) {
+ cf_log_err(subcs, "Failed compiling '%s %s { ... }' section", name, packet_type);
+ return -1;
+ }
+ }
+
+ /*
+ * No 'recv' or 'send' sections. That's an error.
+ */
+ if (!i) {
+ cf_log_err(server, "Virtual servers cannot be empty.");
+ return -1;
+ }
+
+ /*
+ * Instantiate the process modules
+ */
+ i = 0;
+ while ((cp = cf_pair_find_next(conf, cp, "type"))) {
+ fr_app_process_t const *app_process;
+ fr_dict_enum_t const *enumv;
+ int code;
+
+ app_process = (fr_app_process_t const *)inst->type_submodule[i]->module->common;
+ if (app_process->instantiate && (app_process->instantiate(inst->type_submodule[i]->data,
+ inst->type_submodule[i]->conf) < 0)) {
+ cf_log_err(conf, "Instantiation failed for \"%s\"", app_process->name);
+ return -1;
+ }
+
+ /*
+ * We've already done bounds checking in the type_parse function
+ */
+ enumv = cf_data_value(cf_data_find(cp, fr_dict_enum_t, NULL));
+ if (!fr_cond_assert(enumv)) return -1;
+
+ code = enumv->value->vb_uint32;
+ inst->process_by_code[code] = app_process->process; /* Store the process function */
+
+ rad_assert(inst->code_allowed[code] == true);
+ i++;
+ }
+
+ /*
+ * No IO module, it's an empty listener.
+ */
+ if (!inst->io.submodule) return 0;
+
+ /*
+ * These configuration items are not printed by default,
+ * because normal people shouldn't be touching them.
+ */
+ if (!inst->max_packet_size && inst->io.app_io) inst->max_packet_size = inst->io.app_io->default_message_size;
+
+ if (!inst->num_messages) inst->num_messages = 256;
+
+ FR_INTEGER_BOUND_CHECK("num_messages", inst->num_messages, >=, 32);
+ FR_INTEGER_BOUND_CHECK("num_messages", inst->num_messages, <=, 65535);
+
+ FR_INTEGER_BOUND_CHECK("max_packet_size", inst->max_packet_size, >=, 1024);
+ FR_INTEGER_BOUND_CHECK("max_packet_size", inst->max_packet_size, <=, 65535);
+
+ /*
+ * Set talloc ctx for master IO.
+ */
+ inst->io.ctx = inst;
+
+ /*
+ * Instantiate the master io submodule
+ */
+ if (fr_master_app_io.instantiate(&inst->io, conf) < 0) {
+ return -1;
+
+ }
+
+ /*
+ * No dynamic clients, nothing more to do.
+ */
+ if (!inst->io.dynamic_clients) return 0;
+
+ /*
+ * Instantiate proto_dhcpv4_dynamic_client
+ */
+ {
+ fr_app_process_t const *app_process;
+
+ app_process = (fr_app_process_t const *)inst->dynamic_submodule->module->common;
+ if (app_process->instantiate && (app_process->instantiate(inst->dynamic_submodule->data, conf) < 0)) {
+ cf_log_err(conf, "Instantiation failed for \"%s\"", app_process->name);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+/** Bootstrap the application
+ *
+ * Bootstrap I/O and type submodules.
+ *
+ * @param[in] instance Ctx data for this application.
+ * @param[in] conf Listen section parsed to give us instance.
+ * @return
+ * - 0 on success.
+ * - -1 on failure.
+ */
+static int mod_bootstrap(void *instance, CONF_SECTION *conf)
+{
+ proto_dhcpv4_t *inst = talloc_get_type_abort(instance, proto_dhcpv4_t);
+ size_t i = 0;
+ CONF_PAIR *cp = NULL;
+ CONF_SECTION *subcs;
+
+ /*
+ * Ensure that the server CONF_SECTION is always set.
+ */
+ inst->io.server_cs = cf_item_to_section(cf_parent(conf));
+
+ rad_assert(dict_dhcpv4 != NULL);
+ rad_assert(attr_dhcpv4_message_type != NULL);
+
+ /*
+ * Bootstrap the process modules
+ */
+ while ((cp = cf_pair_find_next(conf, cp, "type"))) {
+ char const *value;
+ dl_t const *module = talloc_get_type_abort_const(inst->type_submodule[i]->module, dl_t);
+ fr_app_process_t const *app_process = (fr_app_process_t const *)module->common;
+
+ if (app_process->bootstrap && (app_process->bootstrap(inst->type_submodule[i]->data,
+ inst->type_submodule[i]->conf) < 0)) {
+ cf_log_err(conf, "Bootstrap failed for \"%s\"", app_process->name);
+ return -1;
+ }
+
+ value = cf_pair_value(cp);
+
+ /*
+ * Add handlers for the virtual server calls.
+ * This is so that when one virtual server wants
+ * to call another, it just looks up the data
+ * here by packet name, and doesn't need to troll
+ * through all of the listeners.
+ */
+ if (!cf_data_find(inst->io.server_cs, fr_io_process_t, value)) {
+ fr_io_process_t *process_p;
+
+ rad_assert(inst->io.server_cs); /* Ensure we don't leak memory */
+
+ process_p = talloc(inst->io.server_cs, fr_io_process_t);
+ *process_p = app_process->process;
+
+ (void) cf_data_add(inst->io.server_cs, process_p, value, NULL);
+ }
+
+ i++;
+ }
+
+ /*
+ * No IO module, it's an empty listener.
+ */
+ if (!inst->io.submodule) return 0;
+
+ /*
+ * These timers are usually protocol specific.
+ */
+ FR_TIMEVAL_BOUND_CHECK("idle_timeout", &inst->io.idle_timeout, >=, 1, 0);
+ FR_TIMEVAL_BOUND_CHECK("idle_timeout", &inst->io.idle_timeout, <=, 600, 0);
+
+ FR_TIMEVAL_BOUND_CHECK("nak_lifetime", &inst->io.nak_lifetime, >=, 1, 0);
+ FR_TIMEVAL_BOUND_CHECK("nak_lifetime", &inst->io.nak_lifetime, <=, 600, 0);
+
+ /*
+ * Hide this for now. It's only for people who know what
+ * they're doing.
+ */
+ subcs = cf_section_find(conf, "priority", NULL);
+ if (subcs) {
+ if (cf_section_rules_push(subcs, priority_config) < 0) return -1;
+ if (cf_section_parse(NULL, NULL, subcs) < 0) return -1;
+
+ } else {
+ rad_assert(sizeof(inst->priorities) == sizeof(priorities));
+ memcpy(&inst->priorities, &priorities, sizeof(priorities));
+ }
+
+ /*
+ * Tell the master handler about the main protocol instance.
+ */
+ inst->io.app = &proto_dhcpv4;
+ inst->io.app_instance = inst;
+
+ /*
+ * We will need this for dynamic clients and connected sockets.
+ */
+ inst->io.dl_inst = dl_instance_find(inst);
+ rad_assert(inst != NULL);
+
+ /*
+ * Bootstrap the master IO handler.
+ */
+ if (fr_master_app_io.bootstrap(&inst->io, conf) < 0) {
+ return -1;
+ }
+
+ /*
+ * proto_dhcpv4_udp determines if we have dynamic clients
+ * or not.
+ */
+ if (!inst->io.dynamic_clients) return 0;
+
+ /*
+ * Load proto_dhcpv4_dynamic_client
+ */
+ if (dl_instance(inst, &inst->dynamic_submodule,
+ conf, inst->io.dl_inst, "dynamic_client", DL_TYPE_SUBMODULE) < 0) {
+ cf_log_err(conf, "Failed finding proto_dhcpv4_dynamic_client");
+ return -1;
+ }
+
+ /*
+ * Don't bootstrap the dynamic submodule. We're
+ * not even sure what that means...
+ */
+
+ return 0;
+}
+
+fr_app_t proto_dhcpv4 = {
+ .magic = RLM_MODULE_INIT,
+ .name = "dhcpv4",
+ .config = proto_dhcpv4_config,
+ .inst_size = sizeof(proto_dhcpv4_t),
+
+ .bootstrap = mod_bootstrap,
+ .instantiate = mod_instantiate,
+ .open = mod_open,
+ .decode = mod_decode,
+ .encode = mod_encode,
+ .process_set = mod_process_set,
+ .priority = mod_priority
+};
projects / thirdparty / freeradius-server.git / commitdiff
