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NetworkManager/dhcpcd/client.h
Dan Williams df9976aef0 2005-02-13 Dan Williams <dcbw@redhat.com> 
Patch from Dan Reed:  DHCP options D-BUS API
		Exposes the DHCP options that a device receives to clients over D-BUS.

	* configure.in
		- A few cleanups

	* dhcpcd/client.h
		- Correct names, option length, and types for DHCP options

	* dhcpcd/dhcpcd.[ch]
		- Clarify function names that access DHCP options & data

	* src/NetworkManagerDHCP.c
		- Use new DHCP data access functions

	* src/NetworkManagerDbus.c
		- Message handler for DHCP functions

	* src/nm-dbus-dhcp.[ch] (new)
		- DHCP dbus methods

	* test/nm-dhcp-opt-test.c
		- Test DHCP D-BUS API and return all present DHCP options


git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@444 4912f4e0-d625-0410-9fb7-b9a5a253dbdc
2005-02-13 22:10:03 +00:00

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/*
* dhcpcd - DHCP client daemon -
* Copyright (C) 1996 - 1997 Yoichi Hariguchi <yoichi@fore.com>
* Copyright (C) January, 1998 Sergei Viznyuk <sv@phystech.com>
*
* dhcpcd is an RFC2131 and RFC1541 compliant DHCP client daemon.
*
* This 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.
*/
#ifndef CLIENT_H
#define CLIENT_H
#include <net/ethernet.h>
#include <linux/types.h>
#include <linux/if_tr.h>
#include <netinet/in.h>
#include "dhcpcd.h"
#define IPPACKET_SIZE 1500
#define MAGIC_COOKIE 0x63825363
#define BROADCAST_FLAG 0x8000
#define MAC_BCAST_ADDR "\xff\xff\xff\xff\xff\xff"
#define IP_BCAST_ADDR 0xFFFFFFFF
#ifndef AF_PACKET
#define AF_PACKET 17 /* should have been in socketbits.h */
#endif
#define HWADDR_TRIES 3
/* UDP port numbers for DHCP */
#define DHCP_SERVER_PORT 67 /* from client to server */
#define DHCP_CLIENT_PORT 68 /* from server to client */
/* 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 RETRANSMISSION TIMEOUT (seconds) */
#define DHCP_INITIAL_RTO (5)
#define DHCP_MAX_RTO (64)
#define DHCP_OPTIONS_LENGTH 312
typedef struct dhcpMessage
{
u_char op; /* message type */
u_char htype; /* hardware address type */
u_char hlen; /* hardware address length */
u_char hops; /* should be zero in client's message */
u_int xid; /* transaction id */
u_short secs; /* elapsed time in sec. from trying to boot */
u_short flags;
u_int ciaddr; /* (previously allocated) client IP address */
u_int yiaddr; /* 'your' client IP address */
u_int siaddr; /* should be zero in client's messages */
u_int giaddr; /* should be zero in client's messages */
u_char chaddr[16]; /* client's hardware address */
u_char sname[64]; /* server host name, null terminated string */
u_char file[128]; /* boot file name, null terminated string */
u_char options[DHCP_OPTIONS_LENGTH]; /* message options */
} __attribute__((packed)) dhcpMessage;
typedef struct dhcpOptions
{
u_char len[256];
void *val[256];
u_char num;
} __attribute__((packed)) dhcpOptions;
struct packed_ether_header
{
u_int8_t ether_dhost[ETH_ALEN]; /* destination eth addr */
u_int8_t ether_shost[ETH_ALEN]; /* source ether addr */
u_int16_t ether_type; /* packet type ID field */
} __attribute__((packed));
#define TOKEN_RING_HEADER_PAD sizeof(struct trh_hdr) + sizeof(struct trllc)
typedef struct udpipMessage
{
struct packed_ether_header ethhdr;
char udpipmsg[IPPACKET_SIZE];
char pad_for_tokenring_header[TOKEN_RING_HEADER_PAD];
} __attribute__((packed)) udpipMessage;
typedef struct dhcp_interface
{
char *iface;
int cease;
int running;
int sk;
int foo_sk;
short int saved_if_flags;
unsigned int default_lease_time;
struct in_addr default_router;
int ciaddr;
unsigned char chaddr[ETH_ALEN];
int siaddr;
unsigned char shaddr[ETH_ALEN];
unsigned int xid;
unsigned short ip_id;
unsigned char cls_id[DHCP_CLASS_ID_MAX_LEN];
int cls_id_len;
unsigned char cli_id[DHCP_CLIENT_ID_MAX_LEN];
int cli_id_len;
dhcpOptions dhcp_options;
dhcp_client_options *client_options;
} dhcp_interface;
typedef struct dhcp_option_table
{
const char *name;
const int len_hint;
dhcp_option_type type;
} dhcp_option_table;
static dhcp_option_table dhcp_opt_table[] =
{
/* Names come from http://www.iana.org/assignments/bootp-dhcp-parameters, not to be changed */
/* 0 */ { "Pad", 0, DHCP_OPT_INVALID },
/* 1 */ { "Subnet Mask", 4, DHCP_OPT_ADDRESS },
/* 2 */ { "Time Offset", 4, DHCP_OPT_TIME },
/* 3 */ { "Router", 4, DHCP_OPT_ADDRESS },
/* 4 */ { "Time Server", 4, DHCP_OPT_ADDRESS },
/* 5 */ { "Name Server", 4, DHCP_OPT_ADDRESS },
/* 6 */ { "Domain Server", 4, DHCP_OPT_ADDRESS },
/* 7 */ { "Log Server", 4, DHCP_OPT_ADDRESS },
/* 8 */ { "Quotes Server", 4, DHCP_OPT_ADDRESS },
/* 9 */ { "LPR Server", 4, DHCP_OPT_ADDRESS },
/* 10 */ { "Impress Server", 4, DHCP_OPT_ADDRESS },
/* 11 */ { "RLP Server", 4, DHCP_OPT_ADDRESS },
/* 12 */ { "Hostname", 1, DHCP_OPT_STRING },
/* 13 */ { "Boot File Size", 2, DHCP_OPT_COUNT },
/* 14 */ { "Merit Dump File", 1, DHCP_OPT_STRING },
/* 15 */ { "Domain Name", 1, DHCP_OPT_STRING },
/* 16 */ { "Swap Server", 1, DHCP_OPT_ADDRESS },
/* 17 */ { "Root Path", 1, DHCP_OPT_STRING },
/* 18 */ { "Extension Path", 1, DHCP_OPT_STRING },
/* 19 */ { "Forward On/Off", 1, DHCP_OPT_TOGGLE },
/* 20 */ { "SrcRte On/Off", 1, DHCP_OPT_TOGGLE },
/* 21 */ { "Policy Filter", 1, DHCP_OPT_BLOB },
/* 22 */ { "Max DG Assembly", 2, DHCP_OPT_COUNT },
/* 23 */ { "Default IP TTL", 1, DHCP_OPT_COUNT },
/* 24 */ { "MTU Timeout", 4, DHCP_OPT_TIME },
/* 25 */ { "MTU Plateau", 1, DHCP_OPT_BLOB },
/* 26 */ { "MTU Interface", 2, DHCP_OPT_COUNT },
/* 27 */ { "MTU Subnet", 1, DHCP_OPT_TOGGLE },
/* 28 */ { "Broadcast Address", 4, DHCP_OPT_ADDRESS },
/* 29 */ { "Mask Discovery", 1, DHCP_OPT_TOGGLE },
/* 30 */ { "Mask Supplier", 1, DHCP_OPT_TOGGLE },
/* 31 */ { "Router Discovery", 1, DHCP_OPT_TOGGLE },
/* 32 */ { "Router Request", 4, DHCP_OPT_ADDRESS },
/* 33 */ { "Static Route", 1, DHCP_OPT_BLOB },
/* 34 */ { "Trailers", 1, DHCP_OPT_TOGGLE },
/* 35 */ { "ARP Timeout", 4, DHCP_OPT_TIME },
/* 36 */ { "Ethernet", 1, DHCP_OPT_BLOB },
/* 37 */ { "Default TCP TTL", 1, DHCP_OPT_COUNT},
/* 38 */ { "Keepalive Time", 4, DHCP_OPT_TIME },
/* 39 */ { "Keepalive Data", 1, DHCP_OPT_BLOB },
/* 40 */ { "NIS Domain", 1, DHCP_OPT_STRING },
/* 41 */ { "NIS Servers", 4, DHCP_OPT_ADDRESS },
/* 42 */ { "NTP Servers", 4, DHCP_OPT_ADDRESS },
/* 43 */ { "Vendor Specific", 1, DHCP_OPT_BLOB },
/* 44 */ { "NETBIOS Name Srv", 4, DHCP_OPT_ADDRESS },
/* 45 */ { "NETBIOS Dist Srv", 4, DHCP_OPT_ADDRESS },
/* 46 */ { "NETBIOS Node Type", 1, DHCP_OPT_NUMBER },
/* 47 */ { "NETBIOS Scope", 1, DHCP_OPT_NUMBER },
/* 48 */ { "X Window Font", 4, DHCP_OPT_ADDRESS },
/* 49 */ { "X Window Manager", 4, DHCP_OPT_ADDRESS },
/* 50 */ { "Address Request", 4, DHCP_OPT_ADDRESS },
/* 51 */ { "Address Time", 4, DHCP_OPT_TIME },
/* 52 */ { "Overload", 1, DHCP_OPT_BLOB },
/* 53 */ { "DHCP Msg Type", 1, DHCP_OPT_NUMBER },
/* 54 */ { "DHCP Server Id", 4, DHCP_OPT_ADDRESS },
/* 55 */ { "Parameter List", 1, DHCP_OPT_BLOB },
/* 56 */ { "DHCP Message", 1, DHCP_OPT_BLOB },
/* 57 */ { "DHCP Max Msg Size", 2, DHCP_OPT_COUNT },
/* 58 */ { "Renewal Time", 4, DHCP_OPT_TIME },
/* 59 */ { "Rebinding Time", 4, DHCP_OPT_TIME },
/* 60 */ { "Class Id", 1, DHCP_OPT_BLOB },
/* 61 */ { "Client Id", 1, DHCP_OPT_BLOB },
/* 62 */ { "NetWare/IP Domain", 1, DHCP_OPT_STRING },
/* 63 */ { "NetWare/IP Option", 1, DHCP_OPT_BLOB },
/* 64 */ { "NIS-Domain-Name", 1, DHCP_OPT_STRING },
/* 65 */ { "NIS-Server-Addr", 4, DHCP_OPT_ADDRESS },
/* 66 */ { "Server-Name", 1, DHCP_OPT_STRING },
/* 67 */ { "Bootfile-Name", 1, DHCP_OPT_STRING },
/* 68 */ { "Home-Agent-Addrs", 4, DHCP_OPT_ADDRESS },
/* 69 */ { "SMTP-Server", 4, DHCP_OPT_ADDRESS },
/* 70 */ { "POP3-Server", 4, DHCP_OPT_ADDRESS },
/* 71 */ { "NNTP-Server", 4, DHCP_OPT_ADDRESS },
/* 72 */ { "WWW-Server", 4, DHCP_OPT_ADDRESS },
/* 73 */ { "Finger-Server", 4, DHCP_OPT_ADDRESS },
/* 74 */ { "IRC-Server", 4, DHCP_OPT_ADDRESS },
/* 75 */ { "StreetTalk-Server", 4, DHCP_OPT_ADDRESS },
/* 76 */ { "STDA-Server", 4, DHCP_OPT_ADDRESS },
/* 77 */ { "User-Class", 1, DHCP_OPT_BLOB },
/* 78 */ { "Directory Agent", 1, DHCP_OPT_BLOB },
/* 79 */ { "Service Scope", 1, DHCP_OPT_BLOB },
/* 80 */ { "Rapid Commit", 0, DHCP_OPT_BLOB },
/* 81 */ { "Client FQDN", 1, DHCP_OPT_STRING },
/* 82 */ { "Relay Agent Information", 1, DHCP_OPT_BLOB },
/* 83 */ { "iSNS", 1, DHCP_OPT_BLOB },
/* 84 */ { NULL, 0, DHCP_OPT_INVALID },
/* 85 */ { "NDS Servers", 4, DHCP_OPT_ADDRESS },
/* 86 */ { "NDS Tree Name", 1, DHCP_OPT_BLOB },
/* 87 */ { "NDS Context", 1, DHCP_OPT_BLOB },
/* 88 */ { NULL, 0, DHCP_OPT_INVALID },
/* 89 */ { NULL, 0, DHCP_OPT_INVALID },
/* 90 */ { "Authentication", 1, DHCP_OPT_BLOB },
/* 91 */ { NULL, 0, DHCP_OPT_INVALID },
/* 92 */ { NULL, 0, DHCP_OPT_INVALID },
/* 93 */ { "Client System", 1, DHCP_OPT_BLOB },
/* 94 */ { "Client NDI", 1, DHCP_OPT_BLOB },
/* 95 */ { "LDAP", 1, DHCP_OPT_BLOB },
/* 96 */ { NULL, 0, DHCP_OPT_INVALID },
/* 97 */ { "UUID/GUID", 1, DHCP_OPT_BLOB },
/* 98 */ { "User-Auth", 1, DHCP_OPT_BLOB },
/* 99 */ { NULL, 0, DHCP_OPT_INVALID },
/* 100 */ { NULL, 0, DHCP_OPT_INVALID },
/* 101 */ { NULL, 0, DHCP_OPT_INVALID },
/* 102 */ { NULL, 0, DHCP_OPT_INVALID },
/* 103 */ { NULL, 0, DHCP_OPT_INVALID },
/* 104 */ { NULL, 0, DHCP_OPT_INVALID },
/* 105 */ { NULL, 0, DHCP_OPT_INVALID },
/* 106 */ { NULL, 0, DHCP_OPT_INVALID },
/* 107 */ { NULL, 0, DHCP_OPT_INVALID },
/* 108 */ { NULL, 0, DHCP_OPT_INVALID },
/* 109 */ { NULL, 0, DHCP_OPT_INVALID },
/* 110 */ { NULL, 0, DHCP_OPT_INVALID },
/* 111 */ { NULL, 0, DHCP_OPT_INVALID },
/* 112 */ { "Netinfo Address", 1, DHCP_OPT_BLOB },
/* 113 */ { "Netinfo Tag", 1, DHCP_OPT_BLOB },
/* 114 */ { "URL", 1, DHCP_OPT_STRING },
/* 115 */ { NULL, 1, DHCP_OPT_BLOB },
/* 116 */ { "Auto-Config", 1, DHCP_OPT_BLOB },
/* 117 */ { "Name Service Search", 1, DHCP_OPT_BLOB },
/* 118 */ { "Subnet Selection Option", 4, DHCP_OPT_BLOB },
/* 119 */ { "Domain Search", 1, DHCP_OPT_STRING },
/* 120 */ { "SIP Servers DHCP Option", 1, DHCP_OPT_BLOB },
/* 121 */ { "Classless Static Route Option", 1, DHCP_OPT_BLOB },
/* 122 */ { "CCC", 1, DHCP_OPT_BLOB },
/* 123 */ { "GeoConf Option", 16, DHCP_OPT_BLOB },
/* 124 */ { "V-I Vendor Class", 1, DHCP_OPT_BLOB },
/* 125 */ { "V-I Vendor-Specific Information", 1, DHCP_OPT_BLOB },
/* 126 */ { NULL, 0, DHCP_OPT_INVALID },
/* 127 */ { NULL, 0, DHCP_OPT_INVALID },
};
static const int dhcp_opt_table_len = sizeof(dhcp_opt_table)/sizeof(*dhcp_opt_table);
typedef udpipMessage *(*dhcp_msg_build_proc)(dhcp_interface *, int *msg_len);
int dhcp_reboot(dhcp_interface *iface);
int dhcp_init(dhcp_interface *iface);
int dhcp_request(dhcp_interface *iface, dhcp_msg_build_proc buildDhcpMsg);
int dhcp_renew(dhcp_interface *iface);
int dhcp_rebind(dhcp_interface *iface);
int dhcp_release(dhcp_interface *iface);
#ifdef ARPCHECK
int dhcp_decline(dhcp_interface *iface);
#endif
int dhcp_inform(dhcp_interface *iface);
#endif
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