1 | /*
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2 | * Unix SMB/CIFS implementation.
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3 | * RPC Pipe client / server routines
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4 | * Copyright (C) Andrew Tridgell 1992-1997,
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5 | * Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
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6 | * Copyright (C) Paul Ashton 1997.
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7 | * Copyright (C) Jeremy Allison 1999.
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8 | *
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9 | * This program is free software; you can redistribute it and/or modify
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10 | * it under the terms of the GNU General Public License as published by
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11 | * the Free Software Foundation; either version 3 of the License, or
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12 | * (at your option) any later version.
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13 | *
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14 | * This program is distributed in the hope that it will be useful,
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 | * GNU General Public License for more details.
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18 | *
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19 | * You should have received a copy of the GNU General Public License
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20 | * along with this program; if not, see <http://www.gnu.org/licenses/>.
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21 | */
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22 |
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23 | #include "includes.h"
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24 |
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25 | #undef DBGC_CLASS
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26 | #define DBGC_CLASS DBGC_RPC_PARSE
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27 |
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28 | /*******************************************************************
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29 | Inits an RPC_HDR structure.
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30 | ********************************************************************/
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31 |
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32 | void init_rpc_hdr(RPC_HDR *hdr, enum dcerpc_pkt_type pkt_type, uint8 flags,
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33 | uint32 call_id, int data_len, int auth_len)
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34 | {
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35 | hdr->major = 5; /* RPC version 5 */
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36 | hdr->minor = 0; /* minor version 0 */
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37 | hdr->pkt_type = pkt_type; /* RPC packet type */
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38 | hdr->flags = flags; /* dce/rpc flags */
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39 | hdr->pack_type[0] = 0x10; /* little-endian data representation */
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40 | hdr->pack_type[1] = 0; /* packed data representation */
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41 | hdr->pack_type[2] = 0; /* packed data representation */
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42 | hdr->pack_type[3] = 0; /* packed data representation */
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43 | hdr->frag_len = data_len; /* fragment length, fill in later */
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44 | hdr->auth_len = auth_len; /* authentication length */
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45 | hdr->call_id = call_id; /* call identifier - match incoming RPC */
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46 | }
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47 |
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48 | /*******************************************************************
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49 | Reads or writes an RPC_HDR structure.
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50 | ********************************************************************/
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51 |
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52 | bool smb_io_rpc_hdr(const char *desc, RPC_HDR *rpc, prs_struct *ps, int depth)
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53 | {
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54 | if (rpc == NULL)
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55 | return False;
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56 |
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57 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr");
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58 | depth++;
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59 |
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60 | if(!prs_uint8 ("major ", ps, depth, &rpc->major))
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61 | return False;
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62 |
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63 | if(!prs_uint8 ("minor ", ps, depth, &rpc->minor))
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64 | return False;
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65 | if(!prs_uint8 ("pkt_type ", ps, depth, &rpc->pkt_type))
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66 | return False;
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67 | if(!prs_uint8 ("flags ", ps, depth, &rpc->flags))
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68 | return False;
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69 |
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70 | /* We always marshall in little endian format. */
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71 | if (MARSHALLING(ps))
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72 | rpc->pack_type[0] = 0x10;
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73 |
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74 | if(!prs_uint8("pack_type0", ps, depth, &rpc->pack_type[0]))
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75 | return False;
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76 | if(!prs_uint8("pack_type1", ps, depth, &rpc->pack_type[1]))
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77 | return False;
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78 | if(!prs_uint8("pack_type2", ps, depth, &rpc->pack_type[2]))
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79 | return False;
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80 | if(!prs_uint8("pack_type3", ps, depth, &rpc->pack_type[3]))
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81 | return False;
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82 |
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83 | /*
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84 | * If reading and pack_type[0] == 0 then the data is in big-endian
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85 | * format. Set the flag in the prs_struct to specify reverse-endainness.
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86 | */
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87 |
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88 | if (UNMARSHALLING(ps) && rpc->pack_type[0] == 0) {
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89 | DEBUG(10,("smb_io_rpc_hdr: PDU data format is big-endian. Setting flag.\n"));
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90 | prs_set_endian_data(ps, RPC_BIG_ENDIAN);
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91 | }
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92 |
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93 | if(!prs_uint16("frag_len ", ps, depth, &rpc->frag_len))
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94 | return False;
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95 | if(!prs_uint16("auth_len ", ps, depth, &rpc->auth_len))
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96 | return False;
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97 | if(!prs_uint32("call_id ", ps, depth, &rpc->call_id))
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98 | return False;
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99 | return True;
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100 | }
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101 |
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102 | /*******************************************************************
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103 | Reads or writes an struct ndr_syntax_id structure.
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104 | ********************************************************************/
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105 |
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106 | static bool smb_io_rpc_iface(const char *desc, struct ndr_syntax_id *ifc,
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107 | prs_struct *ps, int depth)
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108 | {
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109 | if (ifc == NULL)
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110 | return False;
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111 |
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112 | prs_debug(ps, depth, desc, "smb_io_rpc_iface");
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113 | depth++;
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114 |
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115 | if (!prs_align(ps))
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116 | return False;
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117 |
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118 | if (!smb_io_uuid( "uuid", &ifc->uuid, ps, depth))
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119 | return False;
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120 |
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121 | if(!prs_uint32 ("version", ps, depth, &ifc->if_version))
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122 | return False;
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123 |
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124 | return True;
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125 | }
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126 |
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127 | /*******************************************************************
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128 | Inits an RPC_ADDR_STR structure.
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129 | ********************************************************************/
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130 |
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131 | static void init_rpc_addr_str(RPC_ADDR_STR *str, const char *name)
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132 | {
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133 | str->len = strlen(name) + 1;
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134 | fstrcpy(str->str, name);
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135 | }
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136 |
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137 | /*******************************************************************
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138 | Reads or writes an RPC_ADDR_STR structure.
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139 | ********************************************************************/
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140 |
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141 | static bool smb_io_rpc_addr_str(const char *desc, RPC_ADDR_STR *str, prs_struct *ps, int depth)
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142 | {
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143 | if (str == NULL)
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144 | return False;
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145 |
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146 | prs_debug(ps, depth, desc, "smb_io_rpc_addr_str");
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147 | depth++;
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148 | if(!prs_align(ps))
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149 | return False;
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150 |
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151 | if(!prs_uint16 ( "len", ps, depth, &str->len))
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152 | return False;
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153 | if(!prs_uint8s (True, "str", ps, depth, (uchar*)str->str, MIN(str->len, sizeof(str->str)) ))
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154 | return False;
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155 | return True;
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156 | }
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157 |
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158 | /*******************************************************************
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159 | Inits an RPC_HDR_BBA structure.
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160 | ********************************************************************/
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161 |
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162 | static void init_rpc_hdr_bba(RPC_HDR_BBA *bba, uint16 max_tsize, uint16 max_rsize, uint32 assoc_gid)
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163 | {
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164 | bba->max_tsize = max_tsize; /* maximum transmission fragment size (0x1630) */
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165 | bba->max_rsize = max_rsize; /* max receive fragment size (0x1630) */
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166 | bba->assoc_gid = assoc_gid; /* associated group id (0x0) */
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167 | }
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168 |
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169 | /*******************************************************************
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170 | Reads or writes an RPC_HDR_BBA structure.
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171 | ********************************************************************/
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172 |
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173 | static bool smb_io_rpc_hdr_bba(const char *desc, RPC_HDR_BBA *rpc, prs_struct *ps, int depth)
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174 | {
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175 | if (rpc == NULL)
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176 | return False;
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177 |
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178 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_bba");
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179 | depth++;
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180 |
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181 | if(!prs_uint16("max_tsize", ps, depth, &rpc->max_tsize))
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182 | return False;
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183 | if(!prs_uint16("max_rsize", ps, depth, &rpc->max_rsize))
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184 | return False;
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185 | if(!prs_uint32("assoc_gid", ps, depth, &rpc->assoc_gid))
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186 | return False;
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187 | return True;
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188 | }
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189 |
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190 | /*******************************************************************
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191 | Inits an RPC_CONTEXT structure.
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192 | Note the transfer pointer must remain valid until this is marshalled.
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193 | ********************************************************************/
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194 |
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195 | void init_rpc_context(RPC_CONTEXT *rpc_ctx, uint16 context_id,
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196 | const struct ndr_syntax_id *abstract,
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197 | const struct ndr_syntax_id *transfer)
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198 | {
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199 | rpc_ctx->context_id = context_id ; /* presentation context identifier (0x0) */
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200 | rpc_ctx->num_transfer_syntaxes = 1 ; /* the number of syntaxes (has always been 1?)(0x1) */
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201 |
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202 | /* num and vers. of interface client is using */
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203 | rpc_ctx->abstract = *abstract;
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204 |
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205 | /* vers. of interface to use for replies */
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206 | rpc_ctx->transfer = CONST_DISCARD(struct ndr_syntax_id *, transfer);
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207 | }
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208 |
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209 | /*******************************************************************
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210 | Inits an RPC_HDR_RB structure.
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211 | Note the context pointer must remain valid until this is marshalled.
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212 | ********************************************************************/
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213 |
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214 | void init_rpc_hdr_rb(RPC_HDR_RB *rpc,
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215 | uint16 max_tsize, uint16 max_rsize, uint32 assoc_gid,
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216 | RPC_CONTEXT *context)
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217 | {
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218 | init_rpc_hdr_bba(&rpc->bba, max_tsize, max_rsize, assoc_gid);
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219 |
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220 | rpc->num_contexts = 1;
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221 | rpc->rpc_context = context;
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222 | }
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223 |
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224 | /*******************************************************************
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225 | Reads or writes an RPC_CONTEXT structure.
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226 | ********************************************************************/
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227 |
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228 | bool smb_io_rpc_context(const char *desc, RPC_CONTEXT *rpc_ctx, prs_struct *ps, int depth)
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229 | {
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230 | int i;
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231 |
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232 | if (rpc_ctx == NULL)
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233 | return False;
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234 |
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235 | if(!prs_align(ps))
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236 | return False;
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237 | if(!prs_uint16("context_id ", ps, depth, &rpc_ctx->context_id ))
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238 | return False;
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239 | if(!prs_uint8 ("num_transfer_syntaxes", ps, depth, &rpc_ctx->num_transfer_syntaxes))
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240 | return False;
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241 |
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242 | /* num_transfer_syntaxes must not be zero. */
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243 | if (rpc_ctx->num_transfer_syntaxes == 0)
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244 | return False;
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245 |
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246 | if(!smb_io_rpc_iface("", &rpc_ctx->abstract, ps, depth))
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247 | return False;
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248 |
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249 | if (UNMARSHALLING(ps)) {
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250 | if (!(rpc_ctx->transfer = PRS_ALLOC_MEM(ps, struct ndr_syntax_id, rpc_ctx->num_transfer_syntaxes))) {
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251 | return False;
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252 | }
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253 | }
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254 |
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255 | for (i = 0; i < rpc_ctx->num_transfer_syntaxes; i++ ) {
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256 | if (!smb_io_rpc_iface("", &rpc_ctx->transfer[i], ps, depth))
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257 | return False;
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258 | }
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259 | return True;
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260 | }
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261 |
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262 | /*******************************************************************
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263 | Reads or writes an RPC_HDR_RB structure.
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264 | ********************************************************************/
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265 |
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266 | bool smb_io_rpc_hdr_rb(const char *desc, RPC_HDR_RB *rpc, prs_struct *ps, int depth)
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267 | {
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268 | int i;
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269 |
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270 | if (rpc == NULL)
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271 | return False;
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272 |
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273 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_rb");
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274 | depth++;
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275 |
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276 | if(!smb_io_rpc_hdr_bba("", &rpc->bba, ps, depth))
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277 | return False;
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278 |
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279 | if(!prs_uint8("num_contexts", ps, depth, &rpc->num_contexts))
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280 | return False;
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281 |
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282 | /* 3 pad bytes following - will be mopped up by the prs_align in smb_io_rpc_context(). */
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283 |
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284 | /* num_contexts must not be zero. */
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285 | if (rpc->num_contexts == 0)
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286 | return False;
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287 |
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288 | if (UNMARSHALLING(ps)) {
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289 | if (!(rpc->rpc_context = PRS_ALLOC_MEM(ps, RPC_CONTEXT, rpc->num_contexts))) {
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290 | return False;
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291 | }
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292 | }
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293 |
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294 | for (i = 0; i < rpc->num_contexts; i++ ) {
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295 | if (!smb_io_rpc_context("", &rpc->rpc_context[i], ps, depth))
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296 | return False;
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297 | }
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298 |
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299 | return True;
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300 | }
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301 |
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302 | /*******************************************************************
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303 | Inits an RPC_RESULTS structure.
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304 |
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305 | lkclXXXX only one reason at the moment!
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306 | ********************************************************************/
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307 |
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308 | static void init_rpc_results(RPC_RESULTS *res,
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309 | uint8 num_results, uint16 result, uint16 reason)
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310 | {
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311 | res->num_results = num_results; /* the number of results (0x01) */
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312 | res->result = result ; /* result (0x00 = accept) */
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313 | res->reason = reason ; /* reason (0x00 = no reason specified) */
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314 | }
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315 |
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316 | /*******************************************************************
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317 | Reads or writes an RPC_RESULTS structure.
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318 |
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319 | lkclXXXX only one reason at the moment!
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320 | ********************************************************************/
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321 |
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322 | static bool smb_io_rpc_results(const char *desc, RPC_RESULTS *res, prs_struct *ps, int depth)
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323 | {
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324 | if (res == NULL)
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325 | return False;
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326 |
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327 | prs_debug(ps, depth, desc, "smb_io_rpc_results");
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328 | depth++;
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329 |
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330 | if(!prs_align(ps))
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331 | return False;
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332 |
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333 | if(!prs_uint8 ("num_results", ps, depth, &res->num_results))
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334 | return False;
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335 |
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336 | if(!prs_align(ps))
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337 | return False;
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338 |
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339 | if(!prs_uint16("result ", ps, depth, &res->result))
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340 | return False;
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341 | if(!prs_uint16("reason ", ps, depth, &res->reason))
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342 | return False;
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343 | return True;
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344 | }
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345 |
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346 | /*******************************************************************
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347 | Init an RPC_HDR_BA structure.
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348 |
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349 | lkclXXXX only one reason at the moment!
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350 |
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351 | ********************************************************************/
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352 |
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353 | void init_rpc_hdr_ba(RPC_HDR_BA *rpc,
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354 | uint16 max_tsize, uint16 max_rsize, uint32 assoc_gid,
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355 | const char *pipe_addr,
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356 | uint8 num_results, uint16 result, uint16 reason,
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357 | const struct ndr_syntax_id *transfer)
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358 | {
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359 | init_rpc_hdr_bba (&rpc->bba, max_tsize, max_rsize, assoc_gid);
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360 | init_rpc_addr_str(&rpc->addr, pipe_addr);
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361 | init_rpc_results (&rpc->res, num_results, result, reason);
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362 |
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363 | /* the transfer syntax from the request */
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364 | memcpy(&rpc->transfer, transfer, sizeof(rpc->transfer));
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365 | }
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366 |
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367 | /*******************************************************************
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368 | Reads or writes an RPC_HDR_BA structure.
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369 | ********************************************************************/
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370 |
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371 | bool smb_io_rpc_hdr_ba(const char *desc, RPC_HDR_BA *rpc, prs_struct *ps, int depth)
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372 | {
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373 | if (rpc == NULL)
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374 | return False;
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375 |
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376 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_ba");
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377 | depth++;
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378 |
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379 | if(!smb_io_rpc_hdr_bba("", &rpc->bba, ps, depth))
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380 | return False;
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381 | if(!smb_io_rpc_addr_str("", &rpc->addr, ps, depth))
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382 | return False;
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383 | if(!smb_io_rpc_results("", &rpc->res, ps, depth))
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384 | return False;
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385 | if(!smb_io_rpc_iface("", &rpc->transfer, ps, depth))
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386 | return False;
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387 | return True;
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388 | }
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389 |
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390 | /*******************************************************************
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391 | Init an RPC_HDR_REQ structure.
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392 | ********************************************************************/
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393 |
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394 | void init_rpc_hdr_req(RPC_HDR_REQ *hdr, uint32 alloc_hint, uint16 opnum)
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395 | {
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396 | hdr->alloc_hint = alloc_hint; /* allocation hint */
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397 | hdr->context_id = 0; /* presentation context identifier */
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398 | hdr->opnum = opnum; /* opnum */
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399 | }
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400 |
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401 | /*******************************************************************
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402 | Reads or writes an RPC_HDR_REQ structure.
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403 | ********************************************************************/
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404 |
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405 | bool smb_io_rpc_hdr_req(const char *desc, RPC_HDR_REQ *rpc, prs_struct *ps, int depth)
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406 | {
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407 | if (rpc == NULL)
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408 | return False;
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409 |
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410 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_req");
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411 | depth++;
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412 |
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413 | if(!prs_uint32("alloc_hint", ps, depth, &rpc->alloc_hint))
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414 | return False;
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415 | if(!prs_uint16("context_id", ps, depth, &rpc->context_id))
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416 | return False;
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417 | if(!prs_uint16("opnum ", ps, depth, &rpc->opnum))
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418 | return False;
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419 | return True;
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420 | }
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421 |
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422 | /*******************************************************************
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423 | Reads or writes an RPC_HDR_RESP structure.
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424 | ********************************************************************/
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425 |
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426 | bool smb_io_rpc_hdr_resp(const char *desc, RPC_HDR_RESP *rpc, prs_struct *ps, int depth)
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427 | {
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428 | if (rpc == NULL)
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429 | return False;
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430 |
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431 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_resp");
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432 | depth++;
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433 |
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434 | if(!prs_uint32("alloc_hint", ps, depth, &rpc->alloc_hint))
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435 | return False;
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436 | if(!prs_uint16("context_id", ps, depth, &rpc->context_id))
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437 | return False;
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438 | if(!prs_uint8 ("cancel_ct ", ps, depth, &rpc->cancel_count))
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439 | return False;
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440 | if(!prs_uint8 ("reserved ", ps, depth, &rpc->reserved))
|
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441 | return False;
|
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442 | return True;
|
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443 | }
|
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444 |
|
---|
445 | /*******************************************************************
|
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446 | Reads or writes an RPC_HDR_FAULT structure.
|
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447 | ********************************************************************/
|
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448 |
|
---|
449 | bool smb_io_rpc_hdr_fault(const char *desc, RPC_HDR_FAULT *rpc, prs_struct *ps, int depth)
|
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450 | {
|
---|
451 | if (rpc == NULL)
|
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452 | return False;
|
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453 |
|
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454 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_fault");
|
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455 | depth++;
|
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456 |
|
---|
457 | if(!prs_dcerpc_status("status ", ps, depth, &rpc->status))
|
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458 | return False;
|
---|
459 | if(!prs_uint32("reserved", ps, depth, &rpc->reserved))
|
---|
460 | return False;
|
---|
461 |
|
---|
462 | return True;
|
---|
463 | }
|
---|
464 |
|
---|
465 | /*******************************************************************
|
---|
466 | Inits an RPC_HDR_AUTH structure.
|
---|
467 | ********************************************************************/
|
---|
468 |
|
---|
469 | void init_rpc_hdr_auth(RPC_HDR_AUTH *rai,
|
---|
470 | uint8 auth_type, uint8 auth_level,
|
---|
471 | uint8 auth_pad_len,
|
---|
472 | uint32 auth_context_id)
|
---|
473 | {
|
---|
474 | rai->auth_type = auth_type;
|
---|
475 | rai->auth_level = auth_level;
|
---|
476 | rai->auth_pad_len = auth_pad_len;
|
---|
477 | rai->auth_reserved = 0;
|
---|
478 | rai->auth_context_id = auth_context_id;
|
---|
479 | }
|
---|
480 |
|
---|
481 | /*******************************************************************
|
---|
482 | Reads or writes an RPC_HDR_AUTH structure.
|
---|
483 | ********************************************************************/
|
---|
484 |
|
---|
485 | bool smb_io_rpc_hdr_auth(const char *desc, RPC_HDR_AUTH *rai, prs_struct *ps, int depth)
|
---|
486 | {
|
---|
487 | if (rai == NULL)
|
---|
488 | return False;
|
---|
489 |
|
---|
490 | prs_debug(ps, depth, desc, "smb_io_rpc_hdr_auth");
|
---|
491 | depth++;
|
---|
492 |
|
---|
493 | if(!prs_align(ps))
|
---|
494 | return False;
|
---|
495 |
|
---|
496 | if(!prs_uint8 ("auth_type ", ps, depth, &rai->auth_type))
|
---|
497 | return False;
|
---|
498 | if(!prs_uint8 ("auth_level ", ps, depth, &rai->auth_level))
|
---|
499 | return False;
|
---|
500 | if(!prs_uint8 ("auth_pad_len ", ps, depth, &rai->auth_pad_len))
|
---|
501 | return False;
|
---|
502 | if(!prs_uint8 ("auth_reserved", ps, depth, &rai->auth_reserved))
|
---|
503 | return False;
|
---|
504 | if(!prs_uint32("auth_context_id", ps, depth, &rai->auth_context_id))
|
---|
505 | return False;
|
---|
506 |
|
---|
507 | return True;
|
---|
508 | }
|
---|