X-Git-Url: https://git.grml.org/?a=blobdiff_plain;f=udhcp%2Fdhcpd.c;fp=udhcp%2Fdhcpd.c;h=0000000000000000000000000000000000000000;hb=2d9408b518952bb6d3d31574c0be38c362bf7489;hp=767f9b013afd9dd99a4eae4ef0e324813097a71c;hpb=c9a6e0699a68fd2bce645ede37a9d5653c60c319;p=grml-terminalserver.git diff --git a/udhcp/dhcpd.c b/udhcp/dhcpd.c deleted file mode 100644 index 767f9b0..0000000 --- a/udhcp/dhcpd.c +++ /dev/null @@ -1,275 +0,0 @@ -/* dhcpd.c - * - * udhcp Server - * Copyright (C) 1999 Matthew Ramsay - * Chris Trew - * - * Rewrite by Russ Dill July 2001 - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "dhcpd.h" -#include "arpping.h" -#include "socket.h" -#include "options.h" -#include "files.h" -#include "serverpacket.h" -#include "common.h" -#include "signalpipe.h" -#include "static_leases.h" - - -/* globals */ -struct dhcpOfferedAddr *leases; -struct server_config_t server_config; - - -#ifdef COMBINED_BINARY -int udhcpd_main(int argc, char *argv[]) -#else -int main(int argc, char *argv[]) -#endif -{ - fd_set rfds; - struct timeval tv; - int server_socket = -1; - int bytes, retval; - struct dhcpMessage packet; - uint8_t *state; - uint8_t *server_id, *requested; - uint32_t server_id_align, requested_align; - unsigned long timeout_end; - struct option_set *option; - struct dhcpOfferedAddr *lease; - struct dhcpOfferedAddr static_lease; - int max_sock; - unsigned long num_ips; - - uint32_t static_lease_ip; - - memset(&server_config, 0, sizeof(struct server_config_t)); - read_config(argc < 2 ? DHCPD_CONF_FILE : argv[1]); - - /* Start the log, sanitize fd's, and write a pid file */ - start_log_and_pid("udhcpd", server_config.pidfile); - - if ((option = find_option(server_config.options, DHCP_LEASE_TIME))) { - memcpy(&server_config.lease, option->data + 2, 4); - server_config.lease = ntohl(server_config.lease); - } - else server_config.lease = LEASE_TIME; - - /* Sanity check */ - // Let's try to fix http://bugs.debian.org/341139 (ericvb@debian.org - 16/12/05) - //num_ips = ntohl(server_config.end) - ntohl(server_config.start); - num_ips = ntohl(server_config.end) - ntohl(server_config.start) + 1; - if (server_config.max_leases > num_ips) { - LOG(LOG_ERR, "max_leases value (%lu) not sane, " - "setting to %lu instead", - server_config.max_leases, num_ips); - server_config.max_leases = num_ips; - } - - leases = xcalloc(server_config.max_leases, sizeof(struct dhcpOfferedAddr)); - read_leases(server_config.lease_file); - - if (read_interface(server_config.interface, &server_config.ifindex, - &server_config.server, server_config.arp) < 0) - return 1; - -#ifndef UDHCP_DEBUG - background(server_config.pidfile); /* hold lock during fork. */ -#endif - - /* Setup the signal pipe */ - udhcp_sp_setup(); - - timeout_end = time(0) + server_config.auto_time; - while(1) { /* loop until universe collapses */ - - if (server_socket < 0) - if ((server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface)) < 0) { - LOG(LOG_ERR, "FATAL: couldn't create server socket, %m"); - return 2; - } - - max_sock = udhcp_sp_fd_set(&rfds, server_socket); - if (server_config.auto_time) { - tv.tv_sec = timeout_end - time(0); - tv.tv_usec = 0; - } - if (!server_config.auto_time || tv.tv_sec > 0) { - retval = select(max_sock + 1, &rfds, NULL, NULL, - server_config.auto_time ? &tv : NULL); - } else retval = 0; /* If we already timed out, fall through */ - - if (retval == 0) { - write_leases(); - timeout_end = time(0) + server_config.auto_time; - continue; - } else if (retval < 0 && errno != EINTR) { - DEBUG(LOG_INFO, "error on select"); - continue; - } - - switch (udhcp_sp_read(&rfds)) { - case SIGUSR1: - LOG(LOG_INFO, "Received a SIGUSR1"); - write_leases(); - /* why not just reset the timeout, eh */ - timeout_end = time(0) + server_config.auto_time; - continue; - case SIGTERM: - LOG(LOG_INFO, "Received a SIGTERM"); - return 0; - case 0: break; /* no signal */ - default: continue; /* signal or error (probably EINTR) */ - } - - if ((bytes = get_packet(&packet, server_socket)) < 0) { /* this waits for a packet - idle */ - if (bytes == -1 && errno != EINTR) { - DEBUG(LOG_INFO, "error on read, %m, reopening socket"); - close(server_socket); - server_socket = -1; - } - continue; - } - - if ((state = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) { - DEBUG(LOG_ERR, "couldn't get option from packet, ignoring"); - continue; - } - - /* Look for a static lease */ - static_lease_ip = getIpByMac(server_config.static_leases, &packet.chaddr); - - if(static_lease_ip) - { - printf("Found static lease: %x\n", static_lease_ip); - - memcpy(&static_lease.chaddr, &packet.chaddr, 16); - static_lease.yiaddr = static_lease_ip; - static_lease.expires = 0; - - lease = &static_lease; - - } - else - { - lease = find_lease_by_chaddr(packet.chaddr); - } - - switch (state[0]) { - case DHCPDISCOVER: - DEBUG(LOG_INFO,"received DISCOVER"); - - if (sendOffer(&packet) < 0) { - LOG(LOG_ERR, "send OFFER failed"); - } - break; - case DHCPREQUEST: - DEBUG(LOG_INFO, "received REQUEST"); - - requested = get_option(&packet, DHCP_REQUESTED_IP); - server_id = get_option(&packet, DHCP_SERVER_ID); - - if (requested) memcpy(&requested_align, requested, 4); - if (server_id) memcpy(&server_id_align, server_id, 4); - - if (lease) { - if (server_id) { - /* SELECTING State */ - DEBUG(LOG_INFO, "server_id = %08x", ntohl(server_id_align)); - if (server_id_align == server_config.server && requested && - requested_align == lease->yiaddr) { - sendACK(&packet, lease->yiaddr); - } - } else { - if (requested) { - /* INIT-REBOOT State */ - if (lease->yiaddr == requested_align) - sendACK(&packet, lease->yiaddr); - else sendNAK(&packet); - } else { - /* RENEWING or REBINDING State */ - if (lease->yiaddr == packet.ciaddr) - sendACK(&packet, lease->yiaddr); - else { - /* don't know what to do!!!! */ - sendNAK(&packet); - } - } - } - - /* what to do if we have no record of the client */ - } else if (server_id) { - /* SELECTING State */ - - } else if (requested) { - /* INIT-REBOOT State */ - if ((lease = find_lease_by_yiaddr(requested_align))) { - if (lease_expired(lease)) { - /* probably best if we drop this lease */ - memset(lease->chaddr, 0, 16); - /* make some contention for this address */ - } else sendNAK(&packet); - } else if (requested_align < server_config.start || - requested_align > server_config.end) { - sendNAK(&packet); - } /* else remain silent */ - - } else { - /* RENEWING or REBINDING State */ - } - break; - case DHCPDECLINE: - DEBUG(LOG_INFO,"received DECLINE"); - if (lease) { - memset(lease->chaddr, 0, 16); - lease->expires = time(0) + server_config.decline_time; - } - break; - case DHCPRELEASE: - DEBUG(LOG_INFO,"received RELEASE"); - if (lease) lease->expires = time(0); - break; - case DHCPINFORM: - DEBUG(LOG_INFO,"received INFORM"); - send_inform(&packet); - break; - default: - LOG(LOG_WARNING, "unsupported DHCP message (%02x) -- ignoring", state[0]); - } - } - - return 0; -} -