auto import from //depot/cupcake/@135843

1 files changed, 178 insertions, 0 deletions

diff --git a/dhcp.h b/dhcp.h
new file mode 100644
index 0000000..e584452
--- /dev/null
+++ b/dhcp.h
@@ -0,0 +1,178 @@
+/* 
+ * dhcpcd - DHCP client daemon
+ * Copyright 2006-2008 Roy Marples <roy@marples.name>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef DHCP_H
+#define DHCP_H
+
+#include <arpa/inet.h>
+
+#include <stdint.h>
+
+#include "config.h"
+#include "dhcpcd.h"
+#include "net.h"
+
+/* Max MTU - defines dhcp option length */
+#define MTU_MAX             1500
+#define MTU_MIN             576
+
+/* UDP port numbers for DHCP */
+#define DHCP_SERVER_PORT    67
+#define DHCP_CLIENT_PORT    68
+
+#define MAGIC_COOKIE        0x63825363
+#define BROADCAST_FLAG      0x8000
+
+/* DHCP message OP code */
+#define DHCP_BOOTREQUEST    1
+#define DHCP_BOOTREPLY      2
+
+/* DHCP message type */
+#define DHCP_DISCOVER       1
+#define DHCP_OFFER          2
+#define DHCP_REQUEST        3
+#define DHCP_DECLINE        4
+#define DHCP_ACK            5
+#define DHCP_NAK            6
+#define DHCP_RELEASE        7
+#define DHCP_INFORM         8
+
+/* DHCP options */
+enum DHO
+{
+	DHO_PAD                    = 0,
+	DHO_SUBNETMASK             = 1,
+	DHO_ROUTER                 = 3,
+	DHO_DNSSERVER              = 6,
+	DHO_HOSTNAME               = 12,
+	DHO_DNSDOMAIN              = 15,
+	DHO_MTU                    = 26,
+	DHO_BROADCAST              = 28,
+	DHO_STATICROUTE            = 33,
+	DHO_NISDOMAIN              = 40,
+	DHO_NISSERVER              = 41,
+	DHO_NTPSERVER              = 42,
+	DHO_VENDOR                 = 43,
+	DHO_IPADDRESS              = 50,
+	DHO_LEASETIME              = 51,
+	DHO_OPTIONSOVERLOADED      = 52,
+	DHO_MESSAGETYPE            = 53,
+	DHO_SERVERID               = 54,
+	DHO_PARAMETERREQUESTLIST   = 55,
+	DHO_MESSAGE                = 56,
+	DHO_MAXMESSAGESIZE         = 57,
+	DHO_RENEWALTIME            = 58,
+	DHO_REBINDTIME             = 59,
+	DHO_VENDORCLASSID          = 60,
+	DHO_CLIENTID               = 61,
+	DHO_USERCLASS              = 77,  /* RFC 3004 */
+	DHO_FQDN                   = 81,
+	DHO_DNSSEARCH              = 119, /* RFC 3397 */
+	DHO_CSR                    = 121, /* RFC 3442 */
+	DHO_MSCSR                  = 249, /* MS code for RFC 3442 */
+	DHO_END                    = 255
+};
+
+/* FQDN values - lsnybble used in flags
+ * hsnybble to create order
+ * and to allow 0x00 to mean disable
+ */
+enum FQDN {
+	FQDN_DISABLE    = 0x00,
+	FQDN_NONE       = 0x18,
+	FQDN_PTR        = 0x20,
+	FQDN_BOTH       = 0x31
+};
+
+/* Sizes for DHCP options */
+#define DHCP_CHADDR_LEN         16
+#define SERVERNAME_LEN          64
+#define BOOTFILE_LEN            128
+#define DHCP_UDP_LEN            (20 + 8)
+#define DHCP_BASE_LEN           (4 + 4 + 2 + 2 + 4 + 4 + 4 + 4 + 4)
+#define DHCP_RESERVE_LEN        (4 + 4 + 4 + 4 + 2)
+#define DHCP_FIXED_LEN          (DHCP_BASE_LEN + DHCP_CHADDR_LEN + \
+				 + SERVERNAME_LEN + BOOTFILE_LEN)
+#define DHCP_OPTION_LEN         (MTU_MAX - DHCP_FIXED_LEN - DHCP_UDP_LEN \
+				 - DHCP_RESERVE_LEN)
+
+/* Some crappy DHCP servers require the BOOTP minimum length */
+#define BOOTP_MESSAGE_LENTH_MIN 300
+
+struct dhcp_message {
+	uint8_t op;           /* message type */
+	uint8_t hwtype;       /* hardware address type */
+	uint8_t hwlen;        /* hardware address length */
+	uint8_t hwopcount;    /* should be zero in client message */
+	uint32_t xid;            /* transaction id */
+	uint16_t secs;           /* elapsed time in sec. from boot */
+	uint16_t flags;
+	uint32_t ciaddr;         /* (previously allocated) client IP */
+	uint32_t yiaddr;         /* 'your' client IP address */
+	uint32_t siaddr;         /* should be zero in client's messages */
+	uint32_t giaddr;         /* should be zero in client's messages */
+	uint8_t chaddr[DHCP_CHADDR_LEN];  /* client's hardware address */
+	uint8_t servername[SERVERNAME_LEN];    /* server host name */
+	uint8_t bootfile[BOOTFILE_LEN];    /* boot file name */
+	uint32_t cookie;
+	uint8_t options[DHCP_OPTION_LEN]; /* message options - cookie */
+};
+
+struct dhcp_lease {
+	struct in_addr addr;
+	struct in_addr net;
+	uint32_t leasetime;
+	uint32_t renewaltime;
+	uint32_t rebindtime;
+	struct in_addr server;
+	time_t leasedfrom;
+	struct timeval boundtime;
+	uint8_t frominfo;
+};
+
+#define add_option_mask(var, val) (var[val >> 3] |= 1 << (val & 7))
+#define del_option_mask(var, val) (var[val >> 3] &= ~(1 << (val & 7)))
+#define has_option_mask(var, val) (var[val >> 3] & (1 << (val & 7)))
+int make_option_mask(uint8_t *, char **, int);
+void print_options(void);
+char *get_option_string(const struct dhcp_message *, uint8_t);
+int get_option_addr(uint32_t *, const struct dhcp_message *, uint8_t);
+int get_option_uint32(uint32_t *, const struct dhcp_message *, uint8_t);
+int get_option_uint16(uint16_t *, const struct dhcp_message *, uint8_t);
+int get_option_uint8(uint8_t *, const struct dhcp_message *, uint8_t);
+struct rt *get_option_routes(const struct dhcp_message *);
+ssize_t configure_env(char **, const char *, const struct dhcp_message *,
+		      const struct options *);
+
+ssize_t make_message(struct dhcp_message **,
+			const struct interface *, const struct dhcp_lease *,
+	     		uint32_t, uint8_t, const struct options *);
+int valid_dhcp_packet(unsigned char *);
+
+ssize_t write_lease(const struct interface *, const struct dhcp_message *);
+struct dhcp_message *read_lease(const struct interface *iface);
+#endif