1 | /* |
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2 | * bbftpd/bbftpd_socket.c |
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3 | * Copyright (C) 1999, 2000, 2001, 2002 IN2P3, CNRS |
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4 | * bbftp@in2p3.fr |
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5 | * http://doc.in2p3.fr/bbftp |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | */ |
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21 | |
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22 | /**************************************************************************** |
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23 | |
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24 | |
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25 | bbftpd_socket.c v 2.0.0 2000/12/19 - Routines creation |
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26 | v 2.0.1 2001/04/23 - Correct indentation |
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27 | - Port to IRIX |
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28 | |
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29 | *****************************************************************************/ |
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30 | #include <bbftpd.h> |
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31 | |
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32 | #include <stdio.h> |
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33 | |
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34 | #include <errno.h> |
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35 | #include <fcntl.h> |
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36 | |
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37 | #include <netinet/tcp.h> |
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38 | #include <bbftpd_private_log.h> |
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39 | #include <sys/socket.h> |
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40 | #include <arpa/inet.h> |
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41 | #include <sys/types.h> |
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42 | #include <unistd.h> |
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43 | #include <utime.h> |
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44 | #if HAVE_STRING_H |
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45 | # include <string.h> |
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46 | #endif |
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47 | |
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48 | #include <netinet/in.h> |
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49 | #include <common.h> |
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50 | #include <daemon.h> |
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51 | #include <daemon_proto.h> |
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52 | #include <structures.h> |
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53 | |
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54 | extern int sendwinsize ; |
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55 | extern int recvwinsize ; |
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56 | extern struct sockaddr_in his_addr; /* Remote adresse */ |
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57 | extern struct sockaddr_in ctrl_addr; /* Local adresse */ |
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58 | extern int fixeddataport ; |
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59 | extern int *myports ; |
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60 | extern int *mysockets ; |
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61 | extern int transferoption ; |
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62 | extern int pasvport_min ; |
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63 | extern int pasvport_max ; |
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64 | |
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65 | /******************************************************************************* |
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66 | ** bbftpd_createreceivesocket : * |
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67 | ** * |
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68 | ** Routine to create a receive socket * |
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69 | ** This routine may send MSG_INFO * |
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70 | ** * |
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71 | ** INPUT variable : * |
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72 | ** portnumber : portnumber to connect NOT MODIFIED * |
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73 | ** * |
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74 | ** OUPUT variable : * |
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75 | ** logmessage : to write the error message in case of error * |
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76 | ** * |
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77 | ** RETURN: * |
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78 | ** -1 Creation failed unrecoverable error * |
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79 | ** 0 OK * |
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80 | ** >0 Creation failed recoverable error * |
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81 | ** * |
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82 | *******************************************************************************/ |
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83 | int bbftpd_createreceivesocket(int portnumber,char *logmessage) |
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84 | { |
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85 | int sock ; |
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86 | struct sockaddr_in data_source ; |
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87 | int on = 1 ; |
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88 | int tcpwinsize ; |
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89 | #if defined(HAVE_SOCKLEN_T) |
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90 | socklen_t addrlen; |
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91 | #else |
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92 | #if defined(SUNOS) || defined(_HPUX_SOURCE) || defined(IRIX) |
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93 | int addrlen ; |
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94 | #else |
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95 | #if defined(AIX) |
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96 | /* Porting AIX 5.2 X64 */ |
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97 | socklen_t addrlen ; |
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98 | #else |
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99 | size_t addrlen ; |
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100 | #endif |
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101 | #endif |
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102 | #endif |
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103 | int retcode ; |
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104 | |
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105 | /*bbftpd_log(BBFTPD_INFO,"New socket to: %s:%d\n",inet_ntoa(his_addr.sin_addr), portnumber);*/ |
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106 | sock = socket ( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ; |
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107 | if ( sock < 0 ) { |
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108 | bbftpd_log(BBFTPD_ERR, "Cannot create receive socket on port %d : %s",portnumber,strerror(errno)); |
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109 | sprintf(logmessage,"Cannot create receive socket on port %d : %s",portnumber,strerror(errno)) ; |
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110 | return (-1) ; |
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111 | } |
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112 | if ( setsockopt(sock,SOL_SOCKET, SO_REUSEADDR,(char *)&on,sizeof(on)) < 0 ) { |
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113 | close(sock) ; |
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114 | bbftpd_log(BBFTPD_ERR,"Cannot set SO_REUSEADDR on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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115 | sprintf(logmessage,"Cannot set SO_REUSEADDR on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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116 | return (-1) ; |
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117 | } |
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118 | tcpwinsize = 1024 * recvwinsize ; |
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119 | if ( setsockopt(sock,SOL_SOCKET, SO_RCVBUF,(char *)&tcpwinsize,sizeof(tcpwinsize)) < 0 ) { |
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120 | /* |
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121 | ** In this case we are going to log a message |
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122 | */ |
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123 | bbftpd_log(BBFTPD_ERR,"Cannot set SO_RCVBUF on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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124 | } |
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125 | addrlen = sizeof(tcpwinsize) ; |
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126 | if ( getsockopt(sock,SOL_SOCKET,SO_RCVBUF,(char *)&tcpwinsize,&addrlen) < 0 ) { |
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127 | bbftpd_log(BBFTPD_ERR,"Cannot get SO_RCVBUF on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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128 | close(sock) ; |
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129 | sprintf(logmessage,"Cannot get SO_RCVBUF on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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130 | return (-1) ; |
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131 | } |
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132 | if ( tcpwinsize < 1024 * recvwinsize ) { |
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133 | sprintf(logmessage,"Receive buffer on port %d cannot be set to %d Bytes, Value is %d Bytes",portnumber,1024*recvwinsize,tcpwinsize) ; |
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134 | reply(MSG_INFO,logmessage) ; |
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135 | } |
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136 | tcpwinsize = 1024 * sendwinsize ; |
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137 | if ( setsockopt(sock,SOL_SOCKET, SO_SNDBUF,(char *)&tcpwinsize,sizeof(tcpwinsize)) < 0 ) { |
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138 | /* |
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139 | ** In this case we just log an error |
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140 | */ |
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141 | bbftpd_log(BBFTPD_ERR,"Cannot set SO_SNDBUF on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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142 | } |
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143 | addrlen = sizeof(tcpwinsize) ; |
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144 | if ( getsockopt(sock,SOL_SOCKET, SO_SNDBUF,(char *)&tcpwinsize,&addrlen) < 0 ) { |
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145 | bbftpd_log(BBFTPD_ERR,"Cannot get SO_SNDBUF on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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146 | close(sock) ; |
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147 | sprintf(logmessage,"Cannot get SO_SNDBUF on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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148 | return (-1) ; |
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149 | } |
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150 | if ( tcpwinsize < 1024 * sendwinsize ) { |
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151 | sprintf(logmessage,"Send buffer on port %d cannot be set to %d Bytes, Value is %d Bytes",portnumber,1024*sendwinsize,tcpwinsize) ; |
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152 | reply(MSG_INFO,logmessage) ; |
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153 | } |
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154 | if ( setsockopt(sock,IPPROTO_TCP, TCP_NODELAY,(char *)&on,sizeof(on)) < 0 ) { |
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155 | close(sock) ; |
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156 | bbftpd_log(BBFTPD_ERR,"Cannot set TCP_NODELAY on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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157 | sprintf(logmessage,"Cannot set TCP_NODELAY on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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158 | return (-1) ; |
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159 | } |
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160 | data_source.sin_family = AF_INET; |
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161 | #ifdef SUNOS |
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162 | data_source.sin_addr = ctrl_addr.sin_addr; |
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163 | #else |
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164 | data_source.sin_addr.s_addr = INADDR_ANY; |
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165 | #endif |
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166 | if ( fixeddataport == 1 ) { |
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167 | data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1); |
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168 | } else { |
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169 | data_source.sin_port = 0; |
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170 | } |
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171 | if ( bind(sock, (struct sockaddr *) &data_source,sizeof(data_source)) < 0) { |
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172 | close(sock) ; |
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173 | bbftpd_log(BBFTPD_ERR,"Cannot bind on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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174 | sprintf(logmessage,"Cannot bind on receive socket port %d : %s",portnumber,strerror(errno)) ; |
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175 | return (-1) ; |
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176 | } |
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177 | data_source.sin_addr = his_addr.sin_addr; |
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178 | data_source.sin_port = htons(portnumber); |
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179 | addrlen = sizeof(data_source) ; |
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180 | retcode = connect(sock,(struct sockaddr *) &data_source,addrlen) ; |
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181 | if ( retcode < 0 ) { |
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182 | if ( errno == EINTR ) { |
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183 | /* |
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184 | ** In this case we are going to tell the calling program |
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185 | ** to retry so we close the socket and set the return code |
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186 | ** to zero |
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187 | */ |
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188 | close(sock) ; |
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189 | bbftpd_log(BBFTPD_ERR,"Cannot connect receive socket port %d : %s, telling calling to retry ",portnumber,strerror(errno)) ; |
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190 | return 0 ; |
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191 | } else { |
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192 | sprintf(logmessage,"Cannot connect receive socket port %s:%d : %s",inet_ntoa(his_addr.sin_addr),portnumber,strerror(errno)) ; |
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193 | bbftpd_log(BBFTPD_ERR,"Cannot connect receive socket port %s:%d : %s",inet_ntoa(his_addr.sin_addr),portnumber,strerror(errno)) ; |
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194 | close(sock) ; |
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195 | return (-1) ; |
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196 | } |
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197 | } |
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198 | bbftpd_log(BBFTPD_DEBUG,"Connected on port: %s:%d\n",inet_ntoa(his_addr.sin_addr),portnumber); |
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199 | return sock ; |
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200 | } |
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201 | |
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202 | /******************************************************************************* |
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203 | ** bbftpd_getdatasockk : * |
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204 | ** * |
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205 | ** Routine to create all the needed sockets to send data * |
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206 | ** * |
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207 | ** INPUT variable : * |
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208 | ** nbsock : number of sockets to create NOT MODIFIED * |
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209 | ** * |
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210 | ** RETURN: * |
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211 | ** -1 Creation failed unrecoverable error * |
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212 | ** 0 OK * |
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213 | ** * |
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214 | *******************************************************************************/ |
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215 | int bbftpd_getdatasock(int nbsock) |
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216 | { |
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217 | int i ; |
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218 | int tcpwinsize ; |
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219 | int on = 1 ; |
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220 | #if defined(HAVE_SOCKLEN_T) |
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221 | socklen_t addrlen; |
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222 | #else |
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223 | #if defined(SUNOS) || defined(_HPUX_SOURCE) || defined(IRIX) |
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224 | int addrlen ; |
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225 | #else |
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226 | #if defined(AIX) |
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227 | /* Porting AIX 5.2 X64 */ |
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228 | socklen_t addrlen ; |
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229 | #else |
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230 | size_t addrlen ; |
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231 | #endif |
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232 | #endif |
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233 | #endif |
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234 | struct linger li ; |
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235 | struct sockaddr_in sck ; |
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236 | int *mysockfree ; |
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237 | int *myportfree; |
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238 | int port ; |
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239 | |
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240 | /* Declaring the variables need to change the value of the TOS */ |
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241 | int tos_value, tos_len; |
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242 | int qbss_value = 0x20; |
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243 | tos_len = sizeof(tos_value); |
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244 | |
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245 | |
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246 | mysockfree = mysockets ; |
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247 | myportfree = myports ; |
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248 | sck = ctrl_addr ; |
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249 | for (i=0 ; i<nbsock ; i++) { |
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250 | sck.sin_port = 0; |
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251 | *mysockfree = socket ( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ; |
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252 | if ( *mysockfree < 0 ) { |
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253 | bbftpd_log(BBFTPD_ERR, "Cannot create data socket : %s",strerror(errno)); |
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254 | /* sprintf(logmessage,"Cannot create data socket : %s",strerror(errno)) ;*/ |
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255 | return -1 ; |
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256 | } |
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257 | if ( setsockopt(*mysockfree,SOL_SOCKET, SO_REUSEADDR,(char *)&on,sizeof(on)) < 0 ) { |
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258 | bbftpd_log(BBFTPD_ERR, "Cannot set SO_REUSEADDR on data socket : %s",strerror(errno)); |
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259 | /* sprintf(logmessage,"Cannot set SO_REUSEADDR on data socket : %s",strerror(errno)) ;*/ |
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260 | return -1 ; |
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261 | } |
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262 | if ( setsockopt(*mysockfree,IPPROTO_TCP, TCP_NODELAY,(char *)&on,sizeof(on)) < 0 ) { |
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263 | bbftpd_log(BBFTPD_ERR, "Cannot set TCP_NODELAY on data socket : %s",strerror(errno)); |
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264 | /* sprintf(logmessage,"Cannot set TCP_NODELAY on data socket : %s",strerror(errno)) ;*/ |
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265 | return -1 ; |
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266 | } |
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267 | |
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268 | /* Printing out the default value for the TOS |
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269 | if( getsockopt(*mysockfree,IPPROTO_IP,IP_TOS, |
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270 | &tos_value, |
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271 | &tos_len) == 0){ |
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272 | } |
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273 | */ |
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274 | if ( (transferoption & TROPT_QBSS ) == TROPT_QBSS ) { |
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275 | /* Setting the value for IP_TOS to be 0x20 */ |
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276 | if ( setsockopt(*mysockfree,IPPROTO_IP, IP_TOS, (char *)&qbss_value, sizeof(qbss_value)) < 0 ) { |
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277 | bbftpd_log(BBFTPD_WARNING, "Cannot set IP_TOS on data socket : %s",strerror(errno)); |
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278 | } |
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279 | } |
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280 | |
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281 | /* |
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282 | ** Send and receive are inversed because they are supposed |
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283 | ** to be the daemon char |
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284 | */ |
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285 | tcpwinsize = 1024 * recvwinsize ; |
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286 | if ( setsockopt(*mysockfree,SOL_SOCKET, SO_SNDBUF,(char *)&tcpwinsize,sizeof(tcpwinsize)) < 0 ) { |
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287 | addrlen = sizeof(tcpwinsize) ; |
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288 | if ( getsockopt(*mysockfree,SOL_SOCKET,SO_SNDBUF,(char *)&tcpwinsize,&addrlen) < 0 ) { |
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289 | bbftpd_log(BBFTPD_WARNING, "Unable to get send buffer size : %s\n",tcpwinsize,strerror(errno)); |
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290 | } else { |
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291 | bbftpd_log(BBFTPD_WARNING, "Send buffer cannot be set to %d Bytes, Value is %d Bytes\n",1024*recvwinsize,tcpwinsize); |
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292 | } |
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293 | } |
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294 | tcpwinsize = 1024 * sendwinsize ; |
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295 | if ( setsockopt(*mysockfree,SOL_SOCKET, SO_RCVBUF,(char *)&tcpwinsize,sizeof(tcpwinsize)) < 0 ) { |
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296 | addrlen = sizeof(tcpwinsize) ; |
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297 | if ( getsockopt(*mysockfree,SOL_SOCKET,SO_RCVBUF,(char *)&tcpwinsize,&addrlen) < 0 ) { |
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298 | bbftpd_log(BBFTPD_WARNING, "Unable to get receive buffer size : %s\n",tcpwinsize,strerror(errno)); |
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299 | } else { |
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300 | bbftpd_log(BBFTPD_WARNING, "Receive buffer cannot be set to %d Bytes, Value is %d Bytes\n",1024*recvwinsize,tcpwinsize); |
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301 | } |
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302 | } |
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303 | li.l_onoff = 1 ; |
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304 | li.l_linger = 1 ; |
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305 | if ( setsockopt(*mysockfree,SOL_SOCKET,SO_LINGER,(char *)&li,sizeof(li)) < 0 ) { |
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306 | bbftpd_log(BBFTPD_ERR, "Cannot set SO_LINGER on data socket : %s",strerror(errno)); |
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307 | /* sprintf(logmessage,"Cannot set SO_LINGER on data socket : %s",strerror(errno)) ;*/ |
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308 | return -1 ; |
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309 | } |
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310 | if (pasvport_min) { /* Try to bind within a range */ |
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311 | for (port=pasvport_min; port<=pasvport_max; port++) { |
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312 | sck.sin_port = htons(port); |
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313 | if (bind(*mysockfree, (struct sockaddr *) &sck, sizeof(sck)) >= 0) break; |
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314 | } |
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315 | if (port>pasvport_max) { |
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316 | bbftpd_log(BBFTPD_ERR, "Cannot bind on data socket : %s",strerror(errno)); |
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317 | return -1 ; |
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318 | } |
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319 | } else { |
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320 | if (bind(*mysockfree, (struct sockaddr *) &sck, sizeof(sck)) < 0) { |
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321 | bbftpd_log(BBFTPD_ERR, "Cannot bind on data socket : %s",strerror(errno)); |
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322 | return -1 ; |
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323 | } |
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324 | } |
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325 | addrlen = sizeof(sck) ; |
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326 | if (getsockname(*mysockfree,(struct sockaddr *)&sck, &addrlen) < 0) { |
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327 | bbftpd_log(BBFTPD_ERR, "Cannot getsockname on data socket : %s",strerror(errno)); |
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328 | /*sprintf(logmessage,"Cannot getsockname on data socket : %s",strerror(errno)) ;*/ |
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329 | return -1 ; |
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330 | } |
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331 | if (listen(*mysockfree, 1) < 0) { |
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332 | bbftpd_log(BBFTPD_ERR, "Cannot listen on data socket : %s",strerror(errno)); |
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333 | /*sprintf(logmessage,"Cannot listen on data socket : %s",strerror(errno)) ;*/ |
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334 | return -1 ; |
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335 | } |
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336 | *myportfree++ = sck.sin_port ; |
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337 | bbftpd_log(BBFTPD_DEBUG,"Listen on port %d\n", ntohs(sck.sin_port)) ; |
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338 | mysockfree++ ; |
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339 | } |
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340 | return 0 ; |
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341 | } |
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