| 1 | /* $Id: resolv_conf_parser.h 93115 2022-01-01 11:31:46Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * resolv_conf_parser.h - interface to parser of resolv.conf resolver(5)
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2014-2022 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 | #ifndef __RESOLV_CONF_PARSER_H__
|
|---|
| 19 | #define __RESOLV_CONF_PARSER_H__
|
|---|
| 20 |
|
|---|
| 21 | #include <iprt/cdefs.h>
|
|---|
| 22 | #include <iprt/net.h>
|
|---|
| 23 |
|
|---|
| 24 | RT_C_DECLS_BEGIN
|
|---|
| 25 |
|
|---|
| 26 | #define RCPS_MAX_NAMESERVERS 3
|
|---|
| 27 | #define RCPS_MAX_SEARCHLIST 10
|
|---|
| 28 | #define RCPS_BUFFER_SIZE 256
|
|---|
| 29 | #define RCPS_IPVX_SIZE 47
|
|---|
| 30 |
|
|---|
| 31 | /**
|
|---|
| 32 | * RESOLV_CONF_FILE can be defined in external tests for verification of Slirp behaviour.
|
|---|
| 33 | */
|
|---|
| 34 | #ifndef RESOLV_CONF_FILE
|
|---|
| 35 | # ifndef RT_OS_OS2
|
|---|
| 36 | # define RESOLV_CONF_FILE "/etc/resolv.conf"
|
|---|
| 37 | # else
|
|---|
| 38 | # define RESOLV_CONF_FILE "\\MPTN\\ETC\\RESOLV2"
|
|---|
| 39 | # endif
|
|---|
| 40 | #endif
|
|---|
| 41 |
|
|---|
| 42 | /**
|
|---|
| 43 | * In Slirp we don't need IPv6 for general case (only for dnsproxy mode
|
|---|
| 44 | * it's potentially acceptable)
|
|---|
| 45 | */
|
|---|
| 46 | #define RCPSF_IGNORE_IPV6 RT_BIT(0)
|
|---|
| 47 |
|
|---|
| 48 | /**
|
|---|
| 49 | * This flag used to request just the strings in rcps_str_nameserver,
|
|---|
| 50 | * but no addresses in rcps_nameserver. This is not very useful,
|
|---|
| 51 | * since we need to validate addresses anyway. This flag is ignored
|
|---|
| 52 | * now.
|
|---|
| 53 | */
|
|---|
| 54 | #define RCPSF_NO_STR2IPCONV RT_BIT(1)
|
|---|
| 55 |
|
|---|
| 56 |
|
|---|
| 57 | struct rcp_state
|
|---|
| 58 | {
|
|---|
| 59 | uint16_t rcps_port;
|
|---|
| 60 | /**
|
|---|
| 61 | * Filling of this array ommited iff RCPSF_NO_STR2IPCONF in rcp_state::rcps_flags set.
|
|---|
| 62 | */
|
|---|
| 63 | RTNETADDR rcps_nameserver[RCPS_MAX_NAMESERVERS];
|
|---|
| 64 | /**
|
|---|
| 65 | * this array contains non-NULL (pointing to rcp_state::rcps_nameserver_str_buffer) iff
|
|---|
| 66 | * RCPSF_NO_STR2IPCONF in rcp_state::rcps_flags set.
|
|---|
| 67 | */
|
|---|
| 68 | char *rcps_str_nameserver[RCPS_MAX_NAMESERVERS];
|
|---|
| 69 | unsigned rcps_num_nameserver;
|
|---|
| 70 | /**
|
|---|
| 71 | * Shortcuts to storage, note that domain is optional
|
|---|
| 72 | * and if it's missed in resolv.conf rcps_domain should be equal
|
|---|
| 73 | * to rcps_search_list[0]
|
|---|
| 74 | */
|
|---|
| 75 | char *rcps_domain;
|
|---|
| 76 | char *rcps_searchlist[RCPS_MAX_SEARCHLIST];
|
|---|
| 77 | unsigned rcps_num_searchlist;
|
|---|
| 78 |
|
|---|
| 79 | uint32_t rcps_flags;
|
|---|
| 80 |
|
|---|
| 81 | char rcps_domain_buffer[RCPS_BUFFER_SIZE];
|
|---|
| 82 | char rcps_searchlist_buffer[RCPS_BUFFER_SIZE];
|
|---|
| 83 | char rcps_nameserver_str_buffer[RCPS_MAX_NAMESERVERS * RCPS_IPVX_SIZE];
|
|---|
| 84 | };
|
|---|
| 85 |
|
|---|
| 86 |
|
|---|
| 87 | /**
|
|---|
| 88 | * This function parses specified file (expected to conform resolver (5) Mac OSX or resolv.conf (3) Linux)
|
|---|
| 89 | * and fills the structure.
|
|---|
| 90 | * @return 0 - on success
|
|---|
| 91 | * -1 - on fail.
|
|---|
| 92 | * <code>
|
|---|
| 93 | * struct rcp_state state;
|
|---|
| 94 | * int rc;
|
|---|
| 95 | *
|
|---|
| 96 | * rc = rcp_parse(&state, "/etc/resolv.conf");
|
|---|
| 97 | * for(i = 0; rc == 0 && i != state.rcps_num_nameserver; ++i)
|
|---|
| 98 | * {
|
|---|
| 99 | * if ((state.rcps_flags & RCPSF_NO_STR2IPCONV) == 0)
|
|---|
| 100 | * {
|
|---|
| 101 | * const RTNETADDR *addr = &state.rcps_nameserver[i];
|
|---|
| 102 | *
|
|---|
| 103 | * switch (state.rcps_nameserver[i].enmType)
|
|---|
| 104 | * {
|
|---|
| 105 | * case RTNETADDRTYPE_IPV4:
|
|---|
| 106 | * RTPrintf("nameserver[%d]: [%RTnaipv4]:%d\n", i, addr->uAddr.IPv4, addr->uPort);
|
|---|
| 107 | * break;
|
|---|
| 108 | * case RTNETADDRTYPE_IPV6:
|
|---|
| 109 | * RTPrintf("nameserver[%d]: [%RTnaipv6]:%d\n", i, &addr->uAddr.IPv6, addr->uPort);
|
|---|
| 110 | * break;
|
|---|
| 111 | * default:
|
|---|
| 112 | * break;
|
|---|
| 113 | * }
|
|---|
| 114 | * }
|
|---|
| 115 | * else
|
|---|
| 116 | * RTPrintf("nameserver[%d]: %s\n", i, state.rcps_str_nameserver[i]);
|
|---|
| 117 | * }
|
|---|
| 118 | * </code>
|
|---|
| 119 | *
|
|---|
| 120 | */
|
|---|
| 121 | int rcp_parse(struct rcp_state *, const char *);
|
|---|
| 122 |
|
|---|
| 123 | RT_C_DECLS_END
|
|---|
| 124 |
|
|---|
| 125 | #endif
|
|---|
