[457] | 1 | /**
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| 2 | * @file
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| 3 | * NetBIOS name service responder
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| 4 | */
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| 5 |
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| 6 | /**
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| 7 | * @defgroup netbiosns NETBIOS responder
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| 8 | * @ingroup apps
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| 9 | *
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| 10 | * This is an example implementation of a NetBIOS name server.
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| 11 | * It responds to name queries for a configurable name.
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| 12 | * Name resolving is not supported.
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| 13 | *
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| 14 | * Note that the device doesn't broadcast it's own name so can't
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| 15 | * detect duplicate names!
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| 16 | */
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| 17 |
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| 18 | /*
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| 19 | * Redistribution and use in source and binary forms, with or without modification,
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| 20 | * are permitted provided that the following conditions are met:
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| 21 | *
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| 22 | * 1. Redistributions of source code must retain the above copyright notice,
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| 23 | * this list of conditions and the following disclaimer.
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| 24 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 25 | * this list of conditions and the following disclaimer in the documentation
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| 26 | * and/or other materials provided with the distribution.
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| 27 | * 3. The name of the author may not be used to endorse or promote products
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| 28 | * derived from this software without specific prior written permission.
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| 29 | *
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| 30 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 31 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 32 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 33 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 34 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 35 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 36 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 37 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 38 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 39 | * OF SUCH DAMAGE.
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| 40 | *
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| 41 | * This file is part of the lwIP TCP/IP stack.
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| 42 | *
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| 43 | * Modifications by Ray Abram to respond to NetBIOS name requests when Incoming name = *
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| 44 | * - based on code from "https://github.com/esp8266/Arduino/commit/1f7989b31d26d7df9776a08f36d685eae7ac8f99"
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| 45 | * - with permission to relicense to BSD from original author:
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| 46 | * http://www.xpablo.cz/?p=751#more-751
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| 47 | */
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| 48 |
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| 49 | #include "lwip/apps/netbiosns.h"
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| 50 |
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| 51 | #if LWIP_IPV4 && LWIP_UDP /* don't build if not configured for use in lwipopts.h */
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| 52 |
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| 53 | #include "lwip/def.h"
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| 54 | #include "lwip/udp.h"
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| 55 | #include "lwip/ip.h"
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| 56 | #include "lwip/netif.h"
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| 57 | #include "lwip/prot/iana.h"
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| 58 |
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| 59 | #include <string.h>
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| 60 |
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| 61 | /** size of a NetBIOS name */
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| 62 | #define NETBIOS_NAME_LEN 16
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| 63 |
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| 64 | /** The Time-To-Live for NetBIOS name responds (in seconds)
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| 65 | * Default is 300000 seconds (3 days, 11 hours, 20 minutes) */
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| 66 | #define NETBIOS_NAME_TTL 300000u
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| 67 |
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| 68 | /** NetBIOS header flags */
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| 69 | #define NETB_HFLAG_RESPONSE 0x8000U
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| 70 | #define NETB_HFLAG_OPCODE 0x7800U
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| 71 | #define NETB_HFLAG_OPCODE_NAME_QUERY 0x0000U
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| 72 | #define NETB_HFLAG_AUTHORATIVE 0x0400U
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| 73 | #define NETB_HFLAG_TRUNCATED 0x0200U
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| 74 | #define NETB_HFLAG_RECURS_DESIRED 0x0100U
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| 75 | #define NETB_HFLAG_RECURS_AVAILABLE 0x0080U
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| 76 | #define NETB_HFLAG_BROADCAST 0x0010U
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| 77 | #define NETB_HFLAG_REPLYCODE 0x0008U
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| 78 | #define NETB_HFLAG_REPLYCODE_NOERROR 0x0000U
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| 79 |
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| 80 | /* NetBIOS question types */
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| 81 | #define NETB_QTYPE_NB 0x0020U
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| 82 | #define NETB_QTYPE_NBSTAT 0x0021U
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| 83 |
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| 84 | /** NetBIOS name flags */
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| 85 | #define NETB_NFLAG_UNIQUE 0x8000U
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| 86 | #define NETB_NFLAG_NODETYPE 0x6000U
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| 87 | #define NETB_NFLAG_NODETYPE_HNODE 0x6000U
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| 88 | #define NETB_NFLAG_NODETYPE_MNODE 0x4000U
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| 89 | #define NETB_NFLAG_NODETYPE_PNODE 0x2000U
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| 90 | #define NETB_NFLAG_NODETYPE_BNODE 0x0000U
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| 91 |
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| 92 | #define NETB_NFLAG_NAME_IN_CONFLICT 0x0800U /* 1=Yes, 0=No */
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| 93 | #define NETB_NFLAG_NAME_IS_ACTIVE 0x0400U /* 1=Yes, 0=No */
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| 94 | #define NETB_NFLAG_NAME_IS_PERMANENT 0x0200U /* 1=Yes (Name is Permanent Node Name), 0=No */
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| 95 |
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| 96 | /** NetBIOS message header */
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| 97 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 98 | # include "arch/bpstruct.h"
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| 99 | #endif
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| 100 | PACK_STRUCT_BEGIN
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| 101 | struct netbios_hdr {
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| 102 | PACK_STRUCT_FIELD(u16_t trans_id);
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| 103 | PACK_STRUCT_FIELD(u16_t flags);
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| 104 | PACK_STRUCT_FIELD(u16_t questions);
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| 105 | PACK_STRUCT_FIELD(u16_t answerRRs);
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| 106 | PACK_STRUCT_FIELD(u16_t authorityRRs);
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| 107 | PACK_STRUCT_FIELD(u16_t additionalRRs);
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| 108 | } PACK_STRUCT_STRUCT;
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| 109 | PACK_STRUCT_END
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| 110 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 111 | # include "arch/epstruct.h"
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| 112 | #endif
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| 113 |
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| 114 | /** NetBIOS message question part */
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| 115 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 116 | # include "arch/bpstruct.h"
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| 117 | #endif
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| 118 | PACK_STRUCT_BEGIN
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| 119 | struct netbios_question_hdr {
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| 120 | PACK_STRUCT_FLD_8(u8_t nametype);
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| 121 | PACK_STRUCT_FLD_8(u8_t encname[(NETBIOS_NAME_LEN * 2) + 1]);
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| 122 | PACK_STRUCT_FIELD(u16_t type);
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| 123 | PACK_STRUCT_FIELD(u16_t cls);
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| 124 | } PACK_STRUCT_STRUCT;
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| 125 | PACK_STRUCT_END
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| 126 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 127 | # include "arch/epstruct.h"
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| 128 | #endif
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| 129 |
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| 130 | /** NetBIOS message name part */
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| 131 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 132 | # include "arch/bpstruct.h"
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| 133 | #endif
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| 134 | PACK_STRUCT_BEGIN
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| 135 | struct netbios_name_hdr {
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| 136 | PACK_STRUCT_FLD_8(u8_t nametype);
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| 137 | PACK_STRUCT_FLD_8(u8_t encname[(NETBIOS_NAME_LEN * 2) + 1]);
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| 138 | PACK_STRUCT_FIELD(u16_t type);
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| 139 | PACK_STRUCT_FIELD(u16_t cls);
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| 140 | PACK_STRUCT_FIELD(u32_t ttl);
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| 141 | PACK_STRUCT_FIELD(u16_t datalen);
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| 142 | PACK_STRUCT_FIELD(u16_t flags);
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| 143 | PACK_STRUCT_FLD_S(ip4_addr_p_t addr);
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| 144 | } PACK_STRUCT_STRUCT;
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| 145 | PACK_STRUCT_END
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| 146 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 147 | # include "arch/epstruct.h"
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| 148 | #endif
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| 149 |
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| 150 | /** NetBIOS message */
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| 151 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 152 | # include "arch/bpstruct.h"
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| 153 | #endif
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| 154 | PACK_STRUCT_BEGIN
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| 155 | struct netbios_resp {
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| 156 | struct netbios_hdr resp_hdr;
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| 157 | struct netbios_name_hdr resp_name;
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| 158 | } PACK_STRUCT_STRUCT;
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| 159 | PACK_STRUCT_END
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| 160 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 161 | # include "arch/epstruct.h"
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| 162 | #endif
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| 163 |
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| 164 | /** The NBNS Structure Responds to a Name Query */
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| 165 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 166 | # include "arch/bpstruct.h"
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| 167 | #endif
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| 168 | PACK_STRUCT_BEGIN
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| 169 | struct netbios_answer {
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| 170 | struct netbios_hdr answer_hdr;
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| 171 | /** the length of the next string */
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| 172 | PACK_STRUCT_FIELD(u8_t name_size);
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| 173 | /** WARNING!!! this item may be of a different length (we use this struct for transmission) */
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| 174 | PACK_STRUCT_FLD_8(u8_t query_name[(NETBIOS_NAME_LEN * 2) + 1]);
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| 175 | PACK_STRUCT_FIELD(u16_t packet_type);
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| 176 | PACK_STRUCT_FIELD(u16_t cls);
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| 177 | PACK_STRUCT_FIELD(u32_t ttl);
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| 178 | PACK_STRUCT_FIELD(u16_t data_length);
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| 179 | #define OFFSETOF_STRUCT_NETBIOS_ANSWER_NUMBER_OF_NAMES 56
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| 180 | /** number of names */
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| 181 | PACK_STRUCT_FLD_8(u8_t number_of_names);
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| 182 | /** node name */
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| 183 | PACK_STRUCT_FLD_8(u8_t answer_name[NETBIOS_NAME_LEN]);
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| 184 | /** node flags */
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| 185 | PACK_STRUCT_FIELD(u16_t answer_name_flags);
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| 186 | /** Unit ID */
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| 187 | PACK_STRUCT_FLD_8(u8_t unit_id[6]);
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| 188 | /** Jumpers */
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| 189 | PACK_STRUCT_FLD_8(u8_t jumpers);
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| 190 | /** Test result */
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| 191 | PACK_STRUCT_FLD_8(u8_t test_result);
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| 192 | /** Version number */
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| 193 | PACK_STRUCT_FIELD(u16_t version_number);
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| 194 | /** Period of statistics */
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| 195 | PACK_STRUCT_FIELD(u16_t period_of_statistics);
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| 196 | /** Statistics */
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| 197 | PACK_STRUCT_FIELD(u16_t number_of_crcs);
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| 198 | /** Statistics */
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| 199 | PACK_STRUCT_FIELD(u16_t number_of_alignment_errors);
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| 200 | /** Statistics */
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| 201 | PACK_STRUCT_FIELD(u16_t number_of_collisions);
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| 202 | /** Statistics */
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| 203 | PACK_STRUCT_FIELD(u16_t number_of_send_aborts);
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| 204 | /** Statistics */
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| 205 | PACK_STRUCT_FIELD(u32_t number_of_good_sends);
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| 206 | /** Statistics */
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| 207 | PACK_STRUCT_FIELD(u32_t number_of_good_receives);
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| 208 | /** Statistics */
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| 209 | PACK_STRUCT_FIELD(u16_t number_of_retransmits);
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| 210 | /** Statistics */
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| 211 | PACK_STRUCT_FIELD(u16_t number_of_no_resource_condition);
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| 212 | /** Statistics */
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| 213 | PACK_STRUCT_FIELD(u16_t number_of_free_command_blocks);
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| 214 | /** Statistics */
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| 215 | PACK_STRUCT_FIELD(u16_t total_number_of_command_blocks);
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| 216 | /** Statistics */
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| 217 | PACK_STRUCT_FIELD(u16_t max_total_number_of_command_blocks);
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| 218 | /** Statistics */
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| 219 | PACK_STRUCT_FIELD(u16_t number_of_pending_sessions);
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| 220 | /** Statistics */
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| 221 | PACK_STRUCT_FIELD(u16_t max_number_of_pending_sessions);
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| 222 | /** Statistics */
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| 223 | PACK_STRUCT_FIELD(u16_t max_total_sessions_possible);
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| 224 | /** Statistics */
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| 225 | PACK_STRUCT_FIELD(u16_t session_data_packet_size);
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| 226 | } PACK_STRUCT_STRUCT;
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| 227 | PACK_STRUCT_END
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| 228 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 229 | # include "arch/epstruct.h"
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| 230 | #endif
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| 231 |
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| 232 | #ifdef NETBIOS_LWIP_NAME
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| 233 | #define NETBIOS_LOCAL_NAME NETBIOS_LWIP_NAME
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| 234 | #else
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| 235 | static char netbiosns_local_name[NETBIOS_NAME_LEN];
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| 236 | #define NETBIOS_LOCAL_NAME netbiosns_local_name
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| 237 | #endif
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| 238 |
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| 239 | static struct udp_pcb *netbiosns_pcb;
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| 240 |
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| 241 | /** Decode a NetBIOS name (from packet to string) */
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| 242 | static int
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| 243 | netbiosns_name_decode(char *name_enc, char *name_dec, int name_dec_len)
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| 244 | {
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| 245 | char *pname;
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| 246 | char cname;
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| 247 | char cnbname;
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| 248 | int idx = 0;
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| 249 |
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| 250 | LWIP_UNUSED_ARG(name_dec_len);
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| 251 |
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| 252 | /* Start decoding netbios name. */
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| 253 | pname = name_enc;
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| 254 | for (;;) {
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| 255 | /* Every two characters of the first level-encoded name
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| 256 | * turn into one character in the decoded name. */
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| 257 | cname = *pname;
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| 258 | if (cname == '\0') {
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| 259 | break; /* no more characters */
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| 260 | }
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| 261 | if (cname == '.') {
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| 262 | break; /* scope ID follows */
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| 263 | }
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| 264 | if (!lwip_isupper(cname)) {
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| 265 | /* Not legal. */
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| 266 | return -1;
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| 267 | }
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| 268 | cname -= 'A';
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| 269 | cnbname = cname << 4;
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| 270 | pname++;
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| 271 |
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| 272 | cname = *pname;
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| 273 | if (!lwip_isupper(cname)) {
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| 274 | /* Not legal. */
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| 275 | return -1;
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| 276 | }
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| 277 | cname -= 'A';
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| 278 | cnbname |= cname;
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| 279 | pname++;
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| 280 |
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| 281 | /* Do we have room to store the character? */
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| 282 | if (idx < NETBIOS_NAME_LEN) {
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| 283 | /* Yes - store the character. */
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| 284 | name_dec[idx++] = (cnbname != ' ' ? cnbname : '\0');
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| 285 | }
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| 286 | }
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| 287 |
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| 288 | return 0;
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| 289 | }
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| 290 |
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| 291 | #if 0 /* function currently unused */
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| 292 | /** Encode a NetBIOS name (from string to packet) - currently unused because
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| 293 | we don't ask for names. */
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| 294 | static int
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| 295 | netbiosns_name_encode(char *name_enc, char *name_dec, int name_dec_len)
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| 296 | {
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| 297 | char *pname;
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| 298 | char cname;
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| 299 | unsigned char ucname;
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| 300 | int idx = 0;
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| 301 |
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| 302 | /* Start encoding netbios name. */
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| 303 | pname = name_enc;
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| 304 |
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| 305 | for (;;) {
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| 306 | /* Every two characters of the first level-encoded name
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| 307 | * turn into one character in the decoded name. */
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| 308 | cname = *pname;
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| 309 | if (cname == '\0') {
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| 310 | break; /* no more characters */
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| 311 | }
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| 312 | if (cname == '.') {
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| 313 | break; /* scope ID follows */
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| 314 | }
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| 315 | if ((cname < 'A' || cname > 'Z') && (cname < '0' || cname > '9')) {
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| 316 | /* Not legal. */
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| 317 | return -1;
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| 318 | }
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| 319 |
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| 320 | /* Do we have room to store the character? */
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| 321 | if (idx >= name_dec_len) {
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| 322 | return -1;
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| 323 | }
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| 324 |
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| 325 | /* Yes - store the character. */
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| 326 | ucname = cname;
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| 327 | name_dec[idx++] = ('A' + ((ucname >> 4) & 0x0F));
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| 328 | name_dec[idx++] = ('A' + ( ucname & 0x0F));
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| 329 | pname++;
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| 330 | }
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| 331 |
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| 332 | /* Fill with "space" coding */
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| 333 | for (; idx < name_dec_len - 1;) {
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| 334 | name_dec[idx++] = 'C';
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| 335 | name_dec[idx++] = 'A';
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| 336 | }
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| 337 |
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| 338 | /* Terminate string */
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| 339 | name_dec[idx] = '\0';
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| 340 |
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| 341 | return 0;
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| 342 | }
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| 343 | #endif /* 0 */
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| 344 |
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| 345 | /** NetBIOS Name service recv callback */
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| 346 | static void
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| 347 | netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
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| 348 | {
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| 349 | LWIP_UNUSED_ARG(arg);
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| 350 |
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| 351 | /* if packet is valid */
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| 352 | if (p != NULL) {
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| 353 | char netbios_name[NETBIOS_NAME_LEN + 1];
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| 354 | struct netbios_hdr *netbios_hdr = (struct netbios_hdr *)p->payload;
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| 355 | struct netbios_question_hdr *netbios_question_hdr = (struct netbios_question_hdr *)(netbios_hdr + 1);
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| 356 |
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| 357 | /* is the packet long enough (we need the header in one piece) */
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| 358 | if (p->len < (sizeof(struct netbios_hdr) + sizeof(struct netbios_question_hdr))) {
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| 359 | /* packet too short */
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| 360 | pbuf_free(p);
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| 361 | return;
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| 362 | }
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| 363 | /* we only answer if we got a default interface */
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| 364 | if (netif_default != NULL) {
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| 365 | /* @todo: do we need to check answerRRs/authorityRRs/additionalRRs? */
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| 366 | /* if the packet is a NetBIOS name query question */
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| 367 | if (((netbios_hdr->flags & PP_NTOHS(NETB_HFLAG_OPCODE)) == PP_NTOHS(NETB_HFLAG_OPCODE_NAME_QUERY)) &&
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| 368 | ((netbios_hdr->flags & PP_NTOHS(NETB_HFLAG_RESPONSE)) == 0) &&
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| 369 | (netbios_hdr->questions == PP_NTOHS(1))) {
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| 370 | /* decode the NetBIOS name */
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| 371 | netbiosns_name_decode((char *)(netbios_question_hdr->encname), netbios_name, sizeof(netbios_name));
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| 372 | /* check the request type */
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| 373 | if (netbios_question_hdr->type == PP_HTONS(NETB_QTYPE_NB)) {
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| 374 | /* if the packet is for us */
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| 375 | if (lwip_strnicmp(netbios_name, NETBIOS_LOCAL_NAME, sizeof(NETBIOS_LOCAL_NAME)) == 0) {
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| 376 | struct pbuf *q;
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| 377 | struct netbios_resp *resp;
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| 378 |
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| 379 | q = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct netbios_resp), PBUF_RAM);
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| 380 | if (q != NULL) {
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| 381 | resp = (struct netbios_resp *)q->payload;
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| 382 |
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| 383 | /* prepare NetBIOS header response */
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| 384 | resp->resp_hdr.trans_id = netbios_hdr->trans_id;
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| 385 | resp->resp_hdr.flags = PP_HTONS(NETB_HFLAG_RESPONSE |
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| 386 | NETB_HFLAG_OPCODE_NAME_QUERY |
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| 387 | NETB_HFLAG_AUTHORATIVE |
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| 388 | NETB_HFLAG_RECURS_DESIRED);
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| 389 | resp->resp_hdr.questions = 0;
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| 390 | resp->resp_hdr.answerRRs = PP_HTONS(1);
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| 391 | resp->resp_hdr.authorityRRs = 0;
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| 392 | resp->resp_hdr.additionalRRs = 0;
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| 393 |
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| 394 | /* prepare NetBIOS header datas */
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| 395 | MEMCPY( resp->resp_name.encname, netbios_question_hdr->encname, sizeof(netbios_question_hdr->encname));
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| 396 | resp->resp_name.nametype = netbios_question_hdr->nametype;
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| 397 | resp->resp_name.type = netbios_question_hdr->type;
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| 398 | resp->resp_name.cls = netbios_question_hdr->cls;
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| 399 | {
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| 400 | uint32_t tty = PP_HTONL(NETBIOS_NAME_TTL);
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| 401 | MEMCPY(&resp->resp_name.ttl, &tty, 4);
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| 402 | }
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| 403 | resp->resp_name.datalen = PP_HTONS(sizeof(resp->resp_name.flags) + sizeof(resp->resp_name.addr));
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| 404 | resp->resp_name.flags = PP_HTONS(NETB_NFLAG_NODETYPE_BNODE);
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| 405 | ip4_addr_copy(resp->resp_name.addr, *netif_ip4_addr(netif_default));
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| 406 |
|
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| 407 | /* send the NetBIOS response */
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| 408 | udp_sendto(upcb, q, addr, port);
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| 409 |
|
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| 410 | /* free the "reference" pbuf */
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| 411 | pbuf_free(q);
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| 412 | }
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| 413 | }
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| 414 | #if LWIP_NETBIOS_RESPOND_NAME_QUERY
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| 415 | } else if (netbios_question_hdr->type == PP_HTONS(NETB_QTYPE_NBSTAT)) {
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| 416 | /* if the packet is for us or general query */
|
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| 417 | if (!lwip_strnicmp(netbios_name, NETBIOS_LOCAL_NAME, sizeof(NETBIOS_LOCAL_NAME)) ||
|
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| 418 | !lwip_strnicmp(netbios_name, "*", sizeof(NETBIOS_LOCAL_NAME))) {
|
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| 419 | /* general query - ask for our IP address */
|
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| 420 | struct pbuf *q;
|
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| 421 | struct netbios_answer *resp;
|
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| 422 |
|
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| 423 | q = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct netbios_answer), PBUF_RAM);
|
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| 424 | if (q != NULL) {
|
---|
| 425 | /* buffer to which a response is compiled */
|
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| 426 | resp = (struct netbios_answer *) q->payload;
|
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| 427 |
|
---|
| 428 | /* Init response to zero, especially the statistics fields */
|
---|
| 429 | memset(resp, 0, sizeof(*resp));
|
---|
| 430 |
|
---|
| 431 | /* copy the query to the response ID */
|
---|
| 432 | resp->answer_hdr.trans_id = netbios_hdr->trans_id;
|
---|
| 433 | /* acknowledgment of termination */
|
---|
| 434 | resp->answer_hdr.flags = PP_HTONS(NETB_HFLAG_RESPONSE | NETB_HFLAG_OPCODE_NAME_QUERY | NETB_HFLAG_AUTHORATIVE);
|
---|
| 435 | /* resp->answer_hdr.questions = PP_HTONS(0); done by memset() */
|
---|
| 436 | /* serial number of the answer */
|
---|
| 437 | resp->answer_hdr.answerRRs = PP_HTONS(1);
|
---|
| 438 | /* resp->answer_hdr.authorityRRs = PP_HTONS(0); done by memset() */
|
---|
| 439 | /* resp->answer_hdr.additionalRRs = PP_HTONS(0); done by memset() */
|
---|
| 440 | /* we will copy the length of the station name */
|
---|
| 441 | resp->name_size = netbios_question_hdr->nametype;
|
---|
| 442 | /* we will copy the queried name */
|
---|
| 443 | MEMCPY(resp->query_name, netbios_question_hdr->encname, (NETBIOS_NAME_LEN * 2) + 1);
|
---|
| 444 | /* NBSTAT */
|
---|
| 445 | resp->packet_type = PP_HTONS(0x21);
|
---|
| 446 | /* Internet name */
|
---|
| 447 | resp->cls = PP_HTONS(1);
|
---|
| 448 | /* resp->ttl = PP_HTONL(0); done by memset() */
|
---|
| 449 | resp->data_length = PP_HTONS(sizeof(struct netbios_answer) - offsetof(struct netbios_answer, number_of_names));
|
---|
| 450 | resp->number_of_names = 1;
|
---|
| 451 |
|
---|
| 452 | /* make windows see us as workstation, not as a server */
|
---|
| 453 | memset(resp->answer_name, 0x20, NETBIOS_NAME_LEN - 1);
|
---|
| 454 | /* strlen is checked to be < NETBIOS_NAME_LEN during initialization */
|
---|
| 455 | MEMCPY(resp->answer_name, NETBIOS_LOCAL_NAME, strlen(NETBIOS_LOCAL_NAME));
|
---|
| 456 |
|
---|
| 457 | /* b-node, unique, active */
|
---|
| 458 | resp->answer_name_flags = PP_HTONS(NETB_NFLAG_NAME_IS_ACTIVE);
|
---|
| 459 |
|
---|
| 460 | /* Set responder netif MAC address */
|
---|
| 461 | SMEMCPY(resp->unit_id, ip_current_input_netif()->hwaddr, sizeof(resp->unit_id));
|
---|
| 462 |
|
---|
| 463 | udp_sendto(upcb, q, addr, port);
|
---|
| 464 | pbuf_free(q);
|
---|
| 465 | }
|
---|
| 466 | }
|
---|
| 467 | #endif /* LWIP_NETBIOS_RESPOND_NAME_QUERY */
|
---|
| 468 | }
|
---|
| 469 | }
|
---|
| 470 | }
|
---|
| 471 | /* free the pbuf */
|
---|
| 472 | pbuf_free(p);
|
---|
| 473 | }
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | /**
|
---|
| 477 | * @ingroup netbiosns
|
---|
| 478 | * Init netbios responder
|
---|
| 479 | */
|
---|
| 480 | void
|
---|
| 481 | netbiosns_init(void)
|
---|
| 482 | {
|
---|
| 483 | /* LWIP_ASSERT_CORE_LOCKED(); is checked by udp_new() */
|
---|
| 484 | #ifdef NETBIOS_LWIP_NAME
|
---|
| 485 | LWIP_ASSERT("NetBIOS name is too long!", strlen(NETBIOS_LWIP_NAME) < NETBIOS_NAME_LEN);
|
---|
| 486 | #endif
|
---|
| 487 |
|
---|
| 488 | netbiosns_pcb = udp_new_ip_type(IPADDR_TYPE_ANY);
|
---|
| 489 | if (netbiosns_pcb != NULL) {
|
---|
| 490 | /* we have to be allowed to send broadcast packets! */
|
---|
| 491 | ip_set_option(netbiosns_pcb, SOF_BROADCAST);
|
---|
| 492 | udp_bind(netbiosns_pcb, IP_ANY_TYPE, LWIP_IANA_PORT_NETBIOS);
|
---|
| 493 | udp_recv(netbiosns_pcb, netbiosns_recv, netbiosns_pcb);
|
---|
| 494 | }
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | #ifndef NETBIOS_LWIP_NAME
|
---|
| 498 | /**
|
---|
| 499 | * @ingroup netbiosns
|
---|
| 500 | * Set netbios name. ATTENTION: the hostname must be less than 15 characters!
|
---|
| 501 | * the NetBIOS name spec says the name MUST be upper case, so incoming name is forced into uppercase :-)
|
---|
| 502 | */
|
---|
| 503 | void
|
---|
| 504 | netbiosns_set_name(const char *hostname)
|
---|
| 505 | {
|
---|
| 506 | size_t i;
|
---|
| 507 | size_t copy_len = strlen(hostname);
|
---|
| 508 | LWIP_ASSERT_CORE_LOCKED();
|
---|
| 509 | LWIP_ASSERT("NetBIOS name is too long!", copy_len < NETBIOS_NAME_LEN);
|
---|
| 510 | if (copy_len >= NETBIOS_NAME_LEN) {
|
---|
| 511 | copy_len = NETBIOS_NAME_LEN - 1;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | /* make name into upper case */
|
---|
| 515 | for (i = 0; i < copy_len; i++ ) {
|
---|
| 516 | netbiosns_local_name[i] = (char)lwip_toupper(hostname[i]);
|
---|
| 517 | }
|
---|
| 518 | netbiosns_local_name[copy_len] = '\0';
|
---|
| 519 | }
|
---|
| 520 | #endif /* NETBIOS_LWIP_NAME */
|
---|
| 521 |
|
---|
| 522 | /**
|
---|
| 523 | * @ingroup netbiosns
|
---|
| 524 | * Stop netbios responder
|
---|
| 525 | */
|
---|
| 526 | void
|
---|
| 527 | netbiosns_stop(void)
|
---|
| 528 | {
|
---|
| 529 | LWIP_ASSERT_CORE_LOCKED();
|
---|
| 530 | if (netbiosns_pcb != NULL) {
|
---|
| 531 | udp_remove(netbiosns_pcb);
|
---|
| 532 | netbiosns_pcb = NULL;
|
---|
| 533 | }
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | #endif /* LWIP_IPV4 && LWIP_UDP */
|
---|