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authorjutteau2007-05-11 18:10:19 +0000
committerjutteau2007-05-11 18:10:19 +0000
commit5e1a84ab74d5e97582427f016f291a8c11e66f99 (patch)
treeddae3f36a21e7fa7c97145f4a49edcfe50063aa3 /i/pc104/initrd/conf/busybox/networking/udhcp/dhcpd.c
parentb95709754c870cbb793266ce8e605a81d01a4f75 (diff)
Completion du script de mise à jour de la pc-104 :
* Ajout des sources de busybox dans ./conf/busybox/ * Ajout d'un fichier réclamé par les script dans ./conf/busybox.links
Diffstat (limited to 'i/pc104/initrd/conf/busybox/networking/udhcp/dhcpd.c')
-rw-r--r--i/pc104/initrd/conf/busybox/networking/udhcp/dhcpd.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/networking/udhcp/dhcpd.c b/i/pc104/initrd/conf/busybox/networking/udhcp/dhcpd.c
new file mode 100644
index 0000000..90d8f0d
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/networking/udhcp/dhcpd.c
@@ -0,0 +1,223 @@
+/* vi: set sw=4 ts=4: */
+/* dhcpd.c
+ *
+ * udhcp Server
+ * Copyright (C) 1999 Matthew Ramsay <matthewr@moreton.com.au>
+ * Chris Trew <ctrew@moreton.com.au>
+ *
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "common.h"
+#include "dhcpd.h"
+#include "options.h"
+
+
+/* globals */
+struct dhcpOfferedAddr *leases;
+struct server_config_t server_config;
+
+
+int udhcpd_main(int argc, char *argv[]);
+int udhcpd_main(int argc, char *argv[])
+{
+ fd_set rfds;
+ struct timeval tv;
+ int server_socket = -1, bytes, retval, max_sock;
+ struct dhcpMessage packet;
+ uint8_t *state, *server_id, *requested;
+ uint32_t server_id_align, requested_align, static_lease_ip;
+ unsigned long timeout_end, num_ips;
+ struct option_set *option;
+ struct dhcpOfferedAddr *lease, static_lease;
+
+ read_config(argc < 2 ? DHCPD_CONF_FILE : argv[1]);
+
+ /* Start the log, sanitize fd's, and write a pid file */
+ udhcp_start_log_and_pid(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 */
+ num_ips = ntohl(server_config.end) - ntohl(server_config.start) + 1;
+ if (server_config.max_leases > num_ips) {
+ bb_error_msg("max_leases value (%lu) not sane, "
+ "setting to %lu instead",
+ server_config.max_leases, num_ips);
+ server_config.max_leases = num_ips;
+ }
+
+ leases = xzalloc(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;
+
+ if (!ENABLE_FEATURE_UDHCP_DEBUG)
+ udhcp_background(server_config.pidfile); /* hold lock during fork. */
+
+ /* 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) {
+ server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface);
+ }
+
+ 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("error on select");
+ continue;
+ }
+
+ switch (udhcp_sp_read(&rfds)) {
+ case SIGUSR1:
+ bb_info_msg("Received a SIGUSR1");
+ write_leases();
+ /* why not just reset the timeout, eh */
+ timeout_end = time(0) + server_config.auto_time;
+ continue;
+ case SIGTERM:
+ bb_info_msg("Received a SIGTERM");
+ return 0;
+ case 0: break; /* no signal */
+ default: continue; /* signal or error (probably EINTR) */
+ }
+
+ if ((bytes = udhcp_get_packet(&packet, server_socket)) < 0) { /* this waits for a packet - idle */
+ if (bytes == -1 && errno != EINTR) {
+ DEBUG("error on read, %s, reopening socket", strerror(errno));
+ close(server_socket);
+ server_socket = -1;
+ }
+ continue;
+ }
+
+ if ((state = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
+ bb_error_msg("cannot 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) {
+ bb_info_msg("Found static lease: %x", 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("Received DISCOVER");
+
+ if (sendOffer(&packet) < 0) {
+ bb_error_msg("send OFFER failed");
+ }
+ break;
+ case DHCPREQUEST:
+ DEBUG("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("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("Received DECLINE");
+ if (lease) {
+ memset(lease->chaddr, 0, 16);
+ lease->expires = time(0) + server_config.decline_time;
+ }
+ break;
+ case DHCPRELEASE:
+ DEBUG("Received RELEASE");
+ if (lease) lease->expires = time(0);
+ break;
+ case DHCPINFORM:
+ DEBUG("Received INFORM");
+ send_inform(&packet);
+ break;
+ default:
+ bb_info_msg("Unsupported DHCP message (%02x) - ignoring", state[0]);
+ }
+ }
+
+ return 0;
+}