base.c

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/*
 *   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: 104d1181c94ac0a171e4b14f6587df38c8ecd62b $
 * @file src/process/dhcpv4/base.c
 * @brief Base DORA, etc. DHCPV4 processing.
 *
 * @copyright 2018 The Freeradius server project.
 * @copyright 2018 Alan DeKok (aland@deployingradius.com)
 */
#define LOG_PREFIX "process_dhcpv4"
 
#include <freeradius-devel/io/application.h>
#include <freeradius-devel/server/protocol.h>
#include <freeradius-devel/server/module_method.h>
#include <freeradius-devel/util/dict.h>
#include <freeradius-devel/util/debug.h>
#include <freeradius-devel/dhcpv4/dhcpv4.h>
 
static fr_dict_t const *dict_dhcpv4;
 
extern fr_dict_autoload_t process_dhcpv4_dict[];
fr_dict_autoload_t process_dhcpv4_dict[] = {
        { .out = &dict_dhcpv4, .proto = "dhcpv4" },
        { NULL }
};
 
static fr_dict_attr_t const *attr_message_type;
static fr_dict_attr_t const *attr_yiaddr;
static fr_dict_attr_t const *attr_packet_type;
 
extern fr_dict_attr_autoload_t process_dhcpv4_dict_attr[];
fr_dict_attr_autoload_t process_dhcpv4_dict_attr[] = {
        { .out = &attr_message_type, .name = "Message-Type", .type = FR_TYPE_UINT8, .dict = &dict_dhcpv4},
        { .out = &attr_yiaddr, .name = "Your-IP-Address", .type = FR_TYPE_IPV4_ADDR, .dict = &dict_dhcpv4},
        { .out = &attr_packet_type, .name = "Packet-Type", .type = FR_TYPE_UINT32, .dict = &dict_dhcpv4},
        { NULL }
};
 
/*
 *      Debug the packet if requested.
 */
static void dhcpv4_packet_debug(request_t *request, fr_packet_t *packet, fr_pair_list_t *list, bool received)
{
#ifdef WITH_IFINDEX_NAME_RESOLUTION
        char if_name[IFNAMSIZ];
#endif
 
        if (!packet) return;
        if (!RDEBUG_ENABLED) return;
 
        log_request(L_DBG, L_DBG_LVL_1, request, __FILE__, __LINE__, "%s %s XID %08x from %s%pV%s:%i to %s%pV%s:%i "
#ifdef WITH_IFINDEX_NAME_RESOLUTION
                       "%s%s%s"
#endif
                       "",
                       received ? "Received" : "Sending",
                       dhcp_message_types[packet->code],
                       packet->id,
                       packet->socket.inet.src_ipaddr.af == AF_INET6 ? "[" : "",
                       fr_box_ipaddr(packet->socket.inet.src_ipaddr),
                       packet->socket.inet.src_ipaddr.af == AF_INET6 ? "]" : "",
                       packet->socket.inet.src_port,
                       packet->socket.inet.dst_ipaddr.af == AF_INET6 ? "[" : "",
                       fr_box_ipaddr(packet->socket.inet.dst_ipaddr),
                       packet->socket.inet.dst_ipaddr.af == AF_INET6 ? "]" : "",
                       packet->socket.inet.dst_port
#ifdef WITH_IFINDEX_NAME_RESOLUTION
                       , packet->socket.inet.ifindex ? "via " : "",
                       packet->socket.inet.ifindex ? fr_ifname_from_ifindex(if_name, packet->socket.inet.ifindex) : "",
                       packet->socket.inet.ifindex ? " " : ""
#endif
                       );
 
        if (received || request->parent) {
                log_request_pair_list(L_DBG_LVL_1, request, NULL, list, NULL);
        } else {
                log_request_proto_pair_list(L_DBG_LVL_1, request, NULL, list, NULL);
        }
}
 
typedef struct {
        uint64_t        nothing;                // so that the next field isn't at offset 0
 
        CONF_SECTION    *discover;
        CONF_SECTION    *offer;
        CONF_SECTION    *request;
        CONF_SECTION    *decline;
        CONF_SECTION    *ack;
        CONF_SECTION    *nak;
        CONF_SECTION    *release;
        CONF_SECTION    *inform;
        CONF_SECTION    *force_renew;
        CONF_SECTION    *lease_query;
        CONF_SECTION    *lease_unassigned;
        CONF_SECTION    *lease_unknown;
        CONF_SECTION    *lease_active;
        CONF_SECTION    *do_not_respond;
 
        CONF_SECTION    *new_client;
        CONF_SECTION    *add_client;
        CONF_SECTION    *deny_client;
} process_dhcpv4_sections_t;
 
typedef struct {
        process_dhcpv4_sections_t sections;
} process_dhcpv4_t;
 
#define FR_DHCP_PROCESS_CODE_VALID(_x) (FR_DHCP_PACKET_CODE_VALID(_x) || (_x == FR_DHCP_DO_NOT_RESPOND))
 
#define PROCESS_PACKET_TYPE             fr_dhcpv4_packet_code_t
#define PROCESS_CODE_MAX                FR_DHCP_CODE_MAX
#define PROCESS_CODE_DO_NOT_RESPOND     FR_DHCP_DO_NOT_RESPOND
#define PROCESS_PACKET_CODE_VALID       FR_DHCP_PROCESS_CODE_VALID
#define PROCESS_INST                    process_dhcpv4_t
#define PROCESS_CODE_DYNAMIC_CLIENT     FR_DHCP_ACK
#include <freeradius-devel/server/process.h>
 
RESUME(check_yiaddr)
{
        fr_pair_t *vp;
 
        vp = fr_pair_find_by_da(&request->reply_pairs, NULL, attr_yiaddr);
        if (!vp) {
                REDEBUG("%s packet does not have YIADDR.  The client will not receive an IP address.",
                        dhcp_message_types[request->reply->code]);
        }
 
        return CALL_RESUME(send_generic);
}
 
static fr_process_state_t const process_state[] = {
        [FR_DHCP_DISCOVER] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_OFFER,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_OFFER,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .recv = recv_generic,
                .resume = resume_recv_generic,
                .section_offset = PROCESS_CONF_OFFSET(discover),
        },
        [FR_DHCP_OFFER] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_OFFER,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_OFFER,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_check_yiaddr,
                .section_offset = PROCESS_CONF_OFFSET(offer),
        },
 
        [FR_DHCP_REQUEST] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_ACK,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_ACK,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_NAK,
                        [RLM_MODULE_FAIL] =     FR_DHCP_NAK,
                        [RLM_MODULE_INVALID] =  FR_DHCP_NAK,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_NAK,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_NAK,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .recv = recv_generic,
                .resume = resume_recv_generic,
                .section_offset = PROCESS_CONF_OFFSET(request),
        },
        [FR_DHCP_DECLINE] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_DO_NOT_RESPOND,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .recv = recv_generic,
                .resume = resume_recv_generic,
                .section_offset = PROCESS_CONF_OFFSET(request),
        },
 
        [FR_DHCP_ACK] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_ACK,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_ACK,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_NAK,
                        [RLM_MODULE_FAIL] =     FR_DHCP_NAK,
                        [RLM_MODULE_INVALID] =  FR_DHCP_NAK,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_NAK,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_NAK,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_check_yiaddr,
                .section_offset = PROCESS_CONF_OFFSET(ack),
        },
        [FR_DHCP_NAK] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_NAK,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_NAK,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_NAK,
                        [RLM_MODULE_FAIL] =     FR_DHCP_NAK,
                        [RLM_MODULE_INVALID] =  FR_DHCP_NAK,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_NAK,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_NAK,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_send_generic,
                .section_offset = PROCESS_CONF_OFFSET(nak),
        },
 
        [FR_DHCP_INFORM] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_ACK,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_ACK,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .recv = recv_generic,
                .resume = resume_recv_generic,
                .section_offset = PROCESS_CONF_OFFSET(inform),
        },
 
        [FR_DHCP_RELEASE] = {   /* releases are not responded to */
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_DO_NOT_RESPOND,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .recv = recv_generic,
                .resume = resume_recv_generic,
                .section_offset = PROCESS_CONF_OFFSET(release),
        },
 
        [FR_DHCP_LEASE_QUERY] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_LEASE_ACTIVE,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_LEASE_ACTIVE,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_LEASE_UNKNOWN,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_LEASE_UNASSIGNED,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .recv = recv_generic,
                .resume = resume_recv_generic,
                .section_offset = PROCESS_CONF_OFFSET(lease_query),
        },
 
        [FR_DHCP_LEASE_UNASSIGNED] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_LEASE_UNASSIGNED,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_LEASE_UNASSIGNED,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_LEASE_UNASSIGNED,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_send_generic,
                .section_offset = PROCESS_CONF_OFFSET(lease_unassigned),
        },
 
        [FR_DHCP_LEASE_UNKNOWN] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_LEASE_UNKNOWN,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_LEASE_UNKNOWN,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_LEASE_UNKNOWN,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_send_generic,
                .section_offset = PROCESS_CONF_OFFSET(lease_unknown),
        },
 
        [FR_DHCP_LEASE_ACTIVE] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_LEASE_ACTIVE,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_LEASE_ACTIVE,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_send_generic,
                .section_offset = PROCESS_CONF_OFFSET(lease_active),
        },
 
        [FR_DHCP_DO_NOT_RESPOND] = {
                .packet_type = {
                        [RLM_MODULE_OK] =       FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOOP] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_UPDATED] =  FR_DHCP_DO_NOT_RESPOND,
 
                        [RLM_MODULE_REJECT] =   FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_FAIL] =     FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_INVALID] =  FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_DISALLOW] = FR_DHCP_DO_NOT_RESPOND,
                        [RLM_MODULE_NOTFOUND] = FR_DHCP_DO_NOT_RESPOND,
                },
                .rcode = RLM_MODULE_NOOP,
                .default_reply = FR_DHCP_DO_NOT_RESPOND,
                .send = send_generic,
                .resume = resume_send_generic,
                .section_offset = PROCESS_CONF_OFFSET(do_not_respond),
        },
};
 
static unlang_action_t mod_process(rlm_rcode_t *p_result, module_ctx_t const *mctx, request_t *request)
{
        fr_process_state_t const *state;
 
        PROCESS_TRACE;
 
        (void)talloc_get_type_abort_const(mctx->mi->data, process_dhcpv4_t);
        fr_assert(PROCESS_PACKET_CODE_VALID(request->packet->code));
 
        request->component = "dhcpv4";
        request->module = NULL;
        fr_assert(request->dict == dict_dhcpv4);
 
        UPDATE_STATE(packet);
 
        if (!state->recv) {
                REDEBUG("Invalid packet type (%u)", request->packet->code);
                RETURN_MODULE_FAIL;
        }
 
        dhcpv4_packet_debug(request, request->packet, &request->request_pairs, true);
 
        if (unlikely(request_is_dynamic_client(request))) {
                return new_client(p_result, mctx, request);
        }
 
        return state->recv(p_result, mctx, request);
}
 
static const virtual_server_compile_t compile_list[] = {
        {
                .section = SECTION_NAME("recv", "Discover"),
                .actions = &mod_actions_postauth,
 
                .methods = (const section_name_t *[]) {
                        &module_method_ippool_allocate,
                        NULL
                },
                .offset = PROCESS_CONF_OFFSET(discover),
        },
        {
                .section = SECTION_NAME("send", "Offer"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(offer),
        },
        {
                .section = SECTION_NAME("recv", "Request"),
                .actions = &mod_actions_postauth,
 
                .methods = (const section_name_t *[]) {
                        &module_method_ippool_extend,
                        NULL
                },
                .offset = PROCESS_CONF_OFFSET(request),
        },
 
        {
                .section = SECTION_NAME("send", "Ack"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(ack),
        },
        {
                .section = SECTION_NAME("send", "NAK"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(nak),
        },
        {
                .section = SECTION_NAME("recv", "Decline"),
                .actions = &mod_actions_postauth,
 
                .methods = (const section_name_t *[]) {
                        &module_method_ippool_mark,
                        NULL
                },
                .offset = PROCESS_CONF_OFFSET(decline),
        },
 
        {
                .section = SECTION_NAME("recv", "Release"),
                .actions = &mod_actions_postauth,
 
                .methods = (const section_name_t *[]) {
                        &module_method_ippool_release,
                        NULL
                },
                .offset = PROCESS_CONF_OFFSET(release),
        },
        {
                .section = SECTION_NAME("recv", "Inform"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(inform),
        },
 
        {
                .section = SECTION_NAME("recv", "Lease-Query"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(lease_query),
        },
        {
                .section = SECTION_NAME("send", "Lease-Unassigned"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(lease_unassigned),
        },
        {
                .section = SECTION_NAME("send", "Lease-Unknown"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(lease_unknown),
        },
        {
                .section = SECTION_NAME("send", "Lease-Active"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(lease_active),
        },
 
        {
                .section = SECTION_NAME("send", "Do-Not-Respond"),
                .actions = &mod_actions_postauth,
                .offset = PROCESS_CONF_OFFSET(do_not_respond),
        },
 
        DYNAMIC_CLIENT_SECTIONS,
 
        COMPILE_TERMINATOR
};
 
 
extern fr_process_module_t process_dhcpv4;
fr_process_module_t process_dhcpv4 = {
        .common = {
                .magic          = MODULE_MAGIC_INIT,
                .name           = "dhcpv4",
                .inst_size      = sizeof(process_dhcpv4_t)
        },
        .process        = mod_process,
        .compile_list   = compile_list,
        .dict           = &dict_dhcpv4
};