remove in place of external link

1 files changed, 0 insertions, 573 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
deleted file mode 100644
index fe2225a0c..000000000
--- a/networking/udhcp/dhcpc.c
+++ /dev/null
@@ -1,573 +0,0 @@
-/* dhcpc.c
- *
- * udhcp DHCP client
- *
- * Russ Dill <Russ.Dill@asu.edu> July 2001
- *
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
- */
-
-#include <sys/time.h>
-#include <sys/file.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <stdlib.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <signal.h>
-#include <time.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <errno.h>
-
-#include "common.h"
-#include "dhcpd.h"
-#include "dhcpc.h"
-#include "options.h"
-#include "clientpacket.h"
-#include "clientsocket.h"
-#include "script.h"
-#include "socket.h"
-#include "signalpipe.h"
-
-static int state;
-static unsigned long requested_ip; /* = 0 */
-static unsigned long server_addr;
-static unsigned long timeout;
-static int packet_num; /* = 0 */
-static int fd = -1;
-
-#define LISTEN_NONE 0
-#define LISTEN_KERNEL 1
-#define LISTEN_RAW 2
-static int listen_mode;
-
-struct client_config_t client_config = {
-	/* Default options. */
-	.abort_if_no_lease = 0,
-	.foreground = 0,
-	.quit_after_lease = 0,
-	.background_if_no_lease = 0,
-	.interface = "eth0",
-	.pidfile = NULL,
-	.script = DEFAULT_SCRIPT,
-	.clientid = NULL,
-	.vendorclass = NULL,
-	.hostname = NULL,
-	.fqdn = NULL,
-	.ifindex = 0,
-	.retries = 3,
-	.timeout = 3,
-	.arp = "\0\0\0\0\0\0",		/* appease gcc-3.0 */
-};
-
-#ifndef IN_BUSYBOX
-static void ATTRIBUTE_NORETURN show_usage(void)
-{
-	printf(
-"Usage: udhcpc [OPTIONS]\n\n"
-"  -c, --clientid=CLIENTID         Set client identifier - type is first char\n"
-"  -C, --clientid-none             Suppress default client identifier\n"
-"  -V, --vendorclass=CLASSID       Set vendor class identifier\n"
-"  -H, --hostname=HOSTNAME         Client hostname\n"
-"  -h                              Alias for -H\n"
-"  -F, --fqdn=FQDN                 Client fully qualified domain name\n"
-"  -f, --foreground                Do not fork after getting lease\n"
-"  -b, --background                Fork to background if lease cannot be\n"
-"                                  immediately negotiated.\n"
-"  -i, --interface=INTERFACE       Interface to use (default: eth0)\n"
-"  -n, --now                       Exit with failure if lease cannot be\n"
-"                                  immediately negotiated.\n"
-"  -p, --pidfile=file              Store process ID of daemon in file\n"
-"  -q, --quit                      Quit after obtaining lease\n"
-"  -r, --request=IP                IP address to request (default: none)\n"
-"  -s, --script=file               Run file at dhcp events (default:\n"
-"                                  " DEFAULT_SCRIPT ")\n"
-"  -T, --timeout=seconds           Try to get the lease for the amount of\n"
-"                                  seconds (default: 3)\n"
-"  -v, --version                   Display version\n"
-	);
-	exit(0);
-}
-#else
-#define show_usage bb_show_usage
-extern void show_usage(void) ATTRIBUTE_NORETURN;
-#endif
-
-
-/* just a little helper */
-static void change_mode(int new_mode)
-{
-	DEBUG(LOG_INFO, "entering %s listen mode",
-		new_mode ? (new_mode == 1 ? "kernel" : "raw") : "none");
-	if (fd >= 0) close(fd);
-	fd = -1;
-	listen_mode = new_mode;
-}
-
-
-/* perform a renew */
-static void perform_renew(void)
-{
-	LOG(LOG_INFO, "Performing a DHCP renew");
-	switch (state) {
-	case BOUND:
-		change_mode(LISTEN_KERNEL);
-	case RENEWING:
-	case REBINDING:
-		state = RENEW_REQUESTED;
-		break;
-	case RENEW_REQUESTED: /* impatient are we? fine, square 1 */
-		run_script(NULL, "deconfig");
-	case REQUESTING:
-	case RELEASED:
-		change_mode(LISTEN_RAW);
-		state = INIT_SELECTING;
-		break;
-	case INIT_SELECTING:
-		break;
-	}
-
-	/* start things over */
-	packet_num = 0;
-
-	/* Kill any timeouts because the user wants this to hurry along */
-	timeout = 0;
-}
-
-
-/* perform a release */
-static void perform_release(void)
-{
-	char buffer[16];
-	struct in_addr temp_addr;
-
-	/* send release packet */
-	if (state == BOUND || state == RENEWING || state == REBINDING) {
-		temp_addr.s_addr = server_addr;
-		sprintf(buffer, "%s", inet_ntoa(temp_addr));
-		temp_addr.s_addr = requested_ip;
-		LOG(LOG_INFO, "Unicasting a release of %s to %s",
-				inet_ntoa(temp_addr), buffer);
-		send_release(server_addr, requested_ip); /* unicast */
-		run_script(NULL, "deconfig");
-	}
-	LOG(LOG_INFO, "Entering released state");
-
-	change_mode(LISTEN_NONE);
-	state = RELEASED;
-	timeout = 0x7fffffff;
-}
-
-
-static void client_background(void)
-{
-	background(client_config.pidfile);
-	client_config.foreground = 1; /* Do not fork again. */
-	client_config.background_if_no_lease = 0;
-}
-
-
-#ifdef COMBINED_BINARY
-int udhcpc_main(int argc, char *argv[])
-#else
-int main(int argc, char *argv[])
-#endif
-{
-	uint8_t *temp, *message;
-	unsigned long t1 = 0, t2 = 0, xid = 0;
-	unsigned long start = 0, lease;
-	fd_set rfds;
-	int retval;
-	struct timeval tv;
-	int c, len;
-	struct dhcpMessage packet;
-	struct in_addr temp_addr;
-	long now;
-	int max_fd;
-	int sig;
-	int no_clientid = 0;
-
-	static const struct option arg_options[] = {
-		{"clientid",	required_argument,	0, 'c'},
-		{"clientid-none", no_argument,		0, 'C'},
-		{"vendorclass",	required_argument,	0, 'V'},
-		{"foreground",	no_argument,		0, 'f'},
-		{"background",	no_argument,		0, 'b'},
-		{"hostname",	required_argument,	0, 'H'},
-		{"hostname",	required_argument,	0, 'h'},
-		{"fqdn",	required_argument,	0, 'F'},
-		{"interface",	required_argument,	0, 'i'},
-		{"now",		no_argument,		0, 'n'},
-		{"pidfile",	required_argument,	0, 'p'},
-		{"quit",	no_argument,		0, 'q'},
-		{"request",	required_argument,	0, 'r'},
-		{"script",	required_argument,	0, 's'},
-		{"timeout",	required_argument,	0, 'T'},
-		{"version",	no_argument,		0, 'v'},
-		{"retries",	required_argument,	0, 't'},		
-		{0, 0, 0, 0}
-	};
-
-	/* get options */
-	while (1) {
-		int option_index = 0;
-		c = getopt_long(argc, argv, "c:CV:fbH:h:F:i:np:qr:s:T:t:v", arg_options, &option_index);
-		if (c == -1) break;
-
-		switch (c) {
-		case 'c':
-			if (no_clientid) show_usage();
-			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
-			free(client_config.clientid);
-			client_config.clientid = xmalloc(len + 2);
-			client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
-			client_config.clientid[OPT_LEN] = len;
-			client_config.clientid[OPT_DATA] = '\0';
-			strncpy((char*)client_config.clientid + OPT_DATA, optarg, len);
-			break;
-		case 'C':
-			if (client_config.clientid) show_usage();
-			no_clientid = 1;
-			break;
-		case 'V':
-			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
-			free(client_config.vendorclass);
-			client_config.vendorclass = xmalloc(len + 2);
-			client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
-			client_config.vendorclass[OPT_LEN] = len;
-			strncpy((char*)client_config.vendorclass + OPT_DATA, optarg, len);
-			break;
-		case 'f':
-			client_config.foreground = 1;
-			break;
-		case 'b':
-			client_config.background_if_no_lease = 1;
-			break;
-		case 'h':
-		case 'H':
-			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
-			free(client_config.hostname);
-			client_config.hostname = xmalloc(len + 2);
-			client_config.hostname[OPT_CODE] = DHCP_HOST_NAME;
-			client_config.hostname[OPT_LEN] = len;
-			strncpy((char*)client_config.hostname + 2, optarg, len);
-			break;
-		case 'F':
-			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
-			free(client_config.fqdn);
-			client_config.fqdn = xmalloc(len + 5);
-			client_config.fqdn[OPT_CODE] = DHCP_FQDN;
-			client_config.fqdn[OPT_LEN] = len + 3;
-			/* Flags: 0000NEOS
-			S: 1 => Client requests Server to update A RR in DNS as well as PTR
-			O: 1 => Server indicates to client that DNS has been updated regardless
-			E: 1 => Name data is DNS format, i.e. <4>host<6>domain<4>com<0> not "host.domain.com"
-			N: 1 => Client requests Server to not update DNS
-			*/
-			client_config.fqdn[OPT_LEN + 1] = 0x1;
-			client_config.fqdn[OPT_LEN + 2] = 0;
-			client_config.fqdn[OPT_LEN + 3] = 0;
-			strncpy((char*)client_config.fqdn + 5, optarg, len);
-			break;
-		case 'i':
-			client_config.interface =  optarg;
-			break;
-		case 'n':
-			client_config.abort_if_no_lease = 1;
-			break;
-		case 'p':
-			client_config.pidfile = optarg;
-			break;
-		case 'q':
-			client_config.quit_after_lease = 1;
-			break;
-		case 'r':
-			requested_ip = inet_addr(optarg);
-			break;
-		case 's':
-			client_config.script = optarg;
-			break;
-		case 'T':
-			client_config.timeout = atoi(optarg);
-			break;
-		case 't':
-			client_config.retries = atoi(optarg);
-			break;
-		case 'v':
-			printf("udhcpcd, version %s\n\n", VERSION);
-			return 0;
-			break;
-		default:
-			show_usage();
-		}
-	}
-
-	/* Start the log, sanitize fd's, and write a pid file */
-	start_log_and_pid("udhcpc", client_config.pidfile);
-
-	if (read_interface(client_config.interface, &client_config.ifindex,
-			   NULL, client_config.arp) < 0)
-		return 1;
-
-	/* if not set, and not suppressed, setup the default client ID */
-	if (!client_config.clientid && !no_clientid) {
-		client_config.clientid = xmalloc(6 + 3);
-		client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
-		client_config.clientid[OPT_LEN] = 7;
-		client_config.clientid[OPT_DATA] = 1;
-		memcpy(client_config.clientid + 3, client_config.arp, 6);
-	}
-
-	if (!client_config.vendorclass) {
-		client_config.vendorclass = xmalloc(sizeof("udhcp "VERSION) + 2);
-		client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
-		client_config.vendorclass[OPT_LEN] = sizeof("udhcp "VERSION) - 1;
-		client_config.vendorclass[OPT_DATA] = 1;
-		memcpy(&client_config.vendorclass[OPT_DATA],
-			"udhcp "VERSION, sizeof("udhcp "VERSION) - 1);
-	}
-
-
-	/* setup the signal pipe */
-	udhcp_sp_setup();
-
-	state = INIT_SELECTING;
-	run_script(NULL, "deconfig");
-	change_mode(LISTEN_RAW);
-
-	for (;;) {
-
-		tv.tv_sec = timeout - uptime();
-		tv.tv_usec = 0;
-
-		if (listen_mode != LISTEN_NONE && fd < 0) {
-			if (listen_mode == LISTEN_KERNEL)
-				fd = listen_socket(INADDR_ANY, CLIENT_PORT, client_config.interface);
-			else
-				fd = raw_socket(client_config.ifindex);
-			if (fd < 0) {
-				LOG(LOG_ERR, "FATAL: couldn't listen on socket, %m");
-				return 0;
-			}
-		}
-		max_fd = udhcp_sp_fd_set(&rfds, fd);
-
-		if (tv.tv_sec > 0) {
-			DEBUG(LOG_INFO, "Waiting on select...");
-			retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
-		} else retval = 0; /* If we already timed out, fall through */
-
-		now = uptime();
-		if (retval == 0) {
-			/* timeout dropped to zero */
-			switch (state) {
-			case INIT_SELECTING:
-				if (packet_num < client_config.retries) {
-					if (packet_num == 0)
-						xid = random_xid();
-
-					/* send discover packet */
-					send_discover(xid, requested_ip); /* broadcast */
-
-					timeout = now + client_config.timeout;
-					packet_num++;
-				} else {
-					run_script(NULL, "leasefail");
-					if (client_config.background_if_no_lease) {
-						LOG(LOG_INFO, "No lease, forking to background.");
-						client_background();
-					} else if (client_config.abort_if_no_lease) {
-						LOG(LOG_INFO, "No lease, failing.");
-						return 1;
-					}
-					/* wait to try again */
-					packet_num = 0;
-					timeout = now + 60;
-				}
-				break;
-			case RENEW_REQUESTED:
-			case REQUESTING:
-				if (packet_num < client_config.retries) {
-					/* send request packet */
-					if (state == RENEW_REQUESTED)
-						send_renew(xid, server_addr, requested_ip); /* unicast */
-					else send_selecting(xid, server_addr, requested_ip); /* broadcast */
-
-					timeout = now + ((packet_num == 2) ? 10 : 2);
-					packet_num++;
-				} else {
-					/* timed out, go back to init state */
-					if (state == RENEW_REQUESTED) run_script(NULL, "deconfig");
-					state = INIT_SELECTING;
-					timeout = now;
-					packet_num = 0;
-					change_mode(LISTEN_RAW);
-				}
-				break;
-			case BOUND:
-				/* Lease is starting to run out, time to enter renewing state */
-				state = RENEWING;
-				change_mode(LISTEN_KERNEL);
-				DEBUG(LOG_INFO, "Entering renew state");
-				/* fall right through */
-			case RENEWING:
-				/* Either set a new T1, or enter REBINDING state */
-				if ((t2 - t1) <= (lease / 14400 + 1)) {
-					/* timed out, enter rebinding state */
-					state = REBINDING;
-					timeout = now + (t2 - t1);
-					DEBUG(LOG_INFO, "Entering rebinding state");
-				} else {
-					/* send a request packet */
-					send_renew(xid, server_addr, requested_ip); /* unicast */
-
-					t1 = (t2 - t1) / 2 + t1;
-					timeout = t1 + start;
-				}
-				break;
-			case REBINDING:
-				/* Either set a new T2, or enter INIT state */
-				if ((lease - t2) <= (lease / 14400 + 1)) {
-					/* timed out, enter init state */
-					state = INIT_SELECTING;
-					LOG(LOG_INFO, "Lease lost, entering init state");
-					run_script(NULL, "deconfig");
-					timeout = now;
-					packet_num = 0;
-					change_mode(LISTEN_RAW);
-				} else {
-					/* send a request packet */
-					send_renew(xid, 0, requested_ip); /* broadcast */
-
-					t2 = (lease - t2) / 2 + t2;
-					timeout = t2 + start;
-				}
-				break;
-			case RELEASED:
-				/* yah, I know, *you* say it would never happen */
-				timeout = 0x7fffffff;
-				break;
-			}
-		} else if (retval > 0 && listen_mode != LISTEN_NONE && FD_ISSET(fd, &rfds)) {
-			/* a packet is ready, read it */
-
-			if (listen_mode == LISTEN_KERNEL)
-				len = get_packet(&packet, fd);
-			else len = get_raw_packet(&packet, fd);
-
-			if (len == -1 && errno != EINTR) {
-				DEBUG(LOG_INFO, "error on read, %m, reopening socket");
-				change_mode(listen_mode); /* just close and reopen */
-			}
-			if (len < 0) continue;
-
-			if (packet.xid != xid) {
-				DEBUG(LOG_INFO, "Ignoring XID %lx (our xid is %lx)",
-					(unsigned long) packet.xid, xid);
-				continue;
-			}
-
-			/* Ignore packets that aren't for us */
-			if (memcmp(packet.chaddr, client_config.arp, 6)) {
-				DEBUG(LOG_INFO, "packet does not have our chaddr -- ignoring");
-				continue;
-			}
-
-			if ((message = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
-				DEBUG(LOG_ERR, "couldnt get option from packet -- ignoring");
-				continue;
-			}
-
-			switch (state) {
-			case INIT_SELECTING:
-				/* Must be a DHCPOFFER to one of our xid's */
-				if (*message == DHCPOFFER) {
-					if ((temp = get_option(&packet, DHCP_SERVER_ID))) {
-						memcpy(&server_addr, temp, 4);
-						xid = packet.xid;
-						requested_ip = packet.yiaddr;
-
-						/* enter requesting state */
-						state = REQUESTING;
-						timeout = now;
-						packet_num = 0;
-					} else {
-						DEBUG(LOG_ERR, "No server ID in message");
-					}
-				}
-				break;
-			case RENEW_REQUESTED:
-			case REQUESTING:
-			case RENEWING:
-			case REBINDING:
-				if (*message == DHCPACK) {
-					if (!(temp = get_option(&packet, DHCP_LEASE_TIME))) {
-						LOG(LOG_ERR, "No lease time with ACK, using 1 hour lease");
-						lease = 60 * 60;
-					} else {
-						memcpy(&lease, temp, 4);
-						lease = ntohl(lease);
-					}
-
-					/* enter bound state */
-					t1 = lease / 2;
-
-					/* little fixed point for n * .875 */
-					t2 = (lease * 0x7) >> 3;
-					temp_addr.s_addr = packet.yiaddr;
-					LOG(LOG_INFO, "Lease of %s obtained, lease time %ld",
-						inet_ntoa(temp_addr), lease);
-					start = now;
-					timeout = t1 + start;
-					requested_ip = packet.yiaddr;
-					run_script(&packet,
-						   ((state == RENEWING || state == REBINDING) ? "renew" : "bound"));
-
-					state = BOUND;
-					change_mode(LISTEN_NONE);
-					if (client_config.quit_after_lease)
-						return 0;
-					if (!client_config.foreground)
-						client_background();
-
-				} else if (*message == DHCPNAK) {
-					/* return to init state */
-					LOG(LOG_INFO, "Received DHCP NAK");
-					run_script(&packet, "nak");
-					if (state != REQUESTING)
-						run_script(NULL, "deconfig");
-					state = INIT_SELECTING;
-					timeout = now;
-					requested_ip = 0;
-					packet_num = 0;
-					change_mode(LISTEN_RAW);
-					sleep(3); /* avoid excessive network traffic */
-				}
-				break;
-			/* case BOUND, RELEASED: - ignore all packets */
-			}
-		} else if (retval > 0 && (sig = udhcp_sp_read(&rfds))) {
-			switch (sig) {
-			case SIGUSR1:
-				perform_renew();
-				break;
-			case SIGUSR2:
-				perform_release();
-				break;
-			case SIGTERM:
-				LOG(LOG_INFO, "Received SIGTERM");
-				return 0;
-			}
-		} else if (retval == -1 && errno == EINTR) {
-			/* a signal was caught */
-		} else {
-			/* An error occured */
-			DEBUG(LOG_ERR, "Error on select");
-		}
-
-	}
-	return 0;
-}