1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1999-2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _PACKET_H 28 #define _PACKET_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 #include <sys/sysmacros.h> /* MIN, MAX, ... */ 34 #include <netinet/in.h> 35 #include <netinet/dhcp.h> 36 #include <dhcp_impl.h> 37 38 #include "agent.h" 39 40 /* 41 * packet.[ch] contain routines for manipulating, setting, and 42 * transmitting DHCP/BOOTP packets. see packet.c for descriptions on 43 * how to use the exported functions. 44 */ 45 46 #ifdef __cplusplus 47 extern "C" { 48 #endif 49 50 struct ifslist; /* forward declaration */ 51 52 /* 53 * data type for recv_pkt(). needed because we may want to wait for 54 * several kinds of packets at once, and the existing enumeration of 55 * DHCP packet types does not provide a way to do that easily. here, 56 * we light a different bit in the enumeration for each type of packet 57 * we want to receive. 58 */ 59 60 typedef enum { 61 62 DHCP_PUNTYPED = 0x001, /* untyped (BOOTP) message */ 63 DHCP_PDISCOVER = 0x002, 64 DHCP_POFFER = 0x004, 65 DHCP_PREQUEST = 0x008, 66 DHCP_PDECLINE = 0x010, 67 DHCP_PACK = 0x020, 68 DHCP_PNAK = 0x040, 69 DHCP_PRELEASE = 0x080, 70 DHCP_PINFORM = 0x100 71 72 } dhcp_message_type_t; 73 74 /* 75 * a dhcp_pkt_t is (right now) what is used by the packet manipulation 76 * functions. while the structure is not strictly necessary, it allows 77 * a better separation of functionality since metadata about the packet 78 * (such as its current length) is stored along with the packet. 79 */ 80 81 typedef struct dhcp_pkt { 82 83 PKT *pkt; /* the real underlying packet */ 84 unsigned int pkt_max_len; /* its maximum length */ 85 unsigned int pkt_cur_len; /* its current length */ 86 87 } dhcp_pkt_t; 88 89 /* 90 * a `stop_func_t' is used by parts of dhcpagent that use the 91 * retransmission capability of send_pkt(). this makes it so the 92 * callers of send_pkt() decide when to stop retransmitting, which 93 * makes more sense than hardcoding their instance-specific cases into 94 * packet.c 95 */ 96 97 typedef boolean_t stop_func_t(struct ifslist *, unsigned int); 98 99 dhcp_pkt_t *init_pkt(struct ifslist *, uchar_t); 100 void add_pkt_opt(dhcp_pkt_t *, uchar_t, const void *, uchar_t); 101 void add_pkt_opt16(dhcp_pkt_t *, uchar_t, uint16_t); 102 void add_pkt_opt32(dhcp_pkt_t *, uchar_t, uint32_t); 103 void free_pkt_list(PKT_LIST **); 104 void remove_from_pkt_list(PKT_LIST **, PKT_LIST *); 105 void stop_pkt_retransmission(struct ifslist *); 106 int recv_pkt(struct ifslist *, int, dhcp_message_type_t, boolean_t); 107 int send_pkt(struct ifslist *, dhcp_pkt_t *, in_addr_t, 108 stop_func_t *); 109 void get_pkt_times(PKT_LIST *, uint32_t *, uint32_t *, uint32_t *); 110 111 #ifdef __cplusplus 112 } 113 #endif 114 115 #endif /* _PACKET_H */ 116