25
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1 /*
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2 * This program is free software; you can redistribute it and/or modify
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3 * it under the terms of the GNU General Public License as published by
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4 * the Free Software Foundation; either version 2 of the License, or
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5 * (at your option) any later version.
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6 *
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7 * This program is distributed in the hope that it will be useful,
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8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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10 * GNU General Public License for more details.
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11 *
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12 * You should have received a copy of the GNU General Public License
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13 * along with this program; if not, write to the Free Software
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14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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15 *
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16 * Jabber
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17 * Copyright (C) 1998-1999 The Jabber Team http://jabber.org/
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18 */
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19
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20 #include "libxode.h"
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21 #include "connwrap.h"
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22
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23 /* socket.c
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24 *
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25 * Simple wrapper to make socket creation easy.
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26 * type = NETSOCKET_SERVER is local listening socket
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27 * type = NETSOCKET_CLIENT is connection socket
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28 * type = NETSOCKET_UDP
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29 */
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30
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31 int make_netsocket(u_short port, char *host, int type, int ssl)
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32 {
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33 int s, flag = 1;
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34 struct sockaddr_in sa;
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35 struct in_addr *saddr;
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36 int socket_type;
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37
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38 /* is this a UDP socket or a TCP socket? */
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39 socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;
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40
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41 bzero((void *)&sa,sizeof(struct sockaddr_in));
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42
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43 if((s = socket(AF_INET,socket_type,0)) < 0)
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44 return(-1);
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45 if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)
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46 return(-1);
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47
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48 saddr = make_addr(host);
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49 if(saddr == NULL)
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50 return(-1);
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51 sa.sin_family = AF_INET;
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52 sa.sin_port = htons(port);
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53
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54 if(type == NETSOCKET_SERVER)
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55 {
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56 /* bind to specific address if specified */
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57 if(host != NULL)
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58 sa.sin_addr.s_addr = saddr->s_addr;
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59
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60 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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61 {
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62 close(s);
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63 return(-1);
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64 }
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65 }
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66 if(type == NETSOCKET_CLIENT)
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67 {
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68 sa.sin_addr.s_addr = saddr->s_addr;
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69 if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)
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70 {
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71 close(s);
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72 return(-1);
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73 }
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74 }
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75 if(type == NETSOCKET_UDP)
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76 {
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77 /* bind to all addresses for now */
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78 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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79 {
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80 close(s);
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81 return(-1);
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82 }
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83
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84 /* specify default recipient for read/write */
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85 sa.sin_addr.s_addr = saddr->s_addr;
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86 if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)
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87 {
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88 close(s);
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89 return(-1);
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90 }
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91 }
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92
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93
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94 return(s);
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95 }
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96
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97 void change_socket_to_blocking(int s)
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98 /* make socket blocking */
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99 {
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100 int val;
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101 val = fcntl(s, F_GETFL, 0);
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102 fcntl(s, F_SETFL, val & (~O_NONBLOCK));
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103 }
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104
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105 void change_socket_to_nonblocking(int s)
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106 /* make socket non-blocking */
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107 {
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108 int val;
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109 val = fcntl(s, F_GETFL, 0);
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110 fcntl(s, F_SETFL, val | O_NONBLOCK);
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111 }
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112
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113 /* socket.c
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114 *
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115 * Simple wrapper to make non-blocking client socket creation easy.
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116 * type = NETSOCKET_SERVER is local listening socket
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117 * type = NETSOCKET_CLIENT is connection socket
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118 * type = NETSOCKET_UDP
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119 */
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120
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121 int make_nb_netsocket(u_short port, char *host, int type, int ssl, int* state)
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122 {
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123 int s, flag = 1;
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124 struct sockaddr_in sa;
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125 struct in_addr *saddr;
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126 int socket_type;
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127
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128 /* is this a UDP socket or a TCP socket? */
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129 socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;
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130
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131 bzero((void *)&sa,sizeof(struct sockaddr_in));
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132
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133 if((s = socket(AF_INET,socket_type,0)) < 0)
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134 return(-1);
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135 if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)
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136 return(-1);
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137 change_socket_to_nonblocking(s);
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138
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139 saddr = make_addr(host);
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140 if(saddr == NULL)
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141 return(-1);
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142 sa.sin_family = AF_INET;
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143 sa.sin_port = htons(port);
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144
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145 if(type == NETSOCKET_SERVER)
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146 {
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147 /* bind to specific address if specified */
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148 if(host != NULL)
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149 sa.sin_addr.s_addr = saddr->s_addr;
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150
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151 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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152 {
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153 close(s);
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154 return(-1);
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155 }
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156 }
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157 if(type == NETSOCKET_CLIENT)
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158 {
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159 int rc;
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160 sa.sin_addr.s_addr = saddr->s_addr;
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161 rc = cw_nb_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl, state);
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162 if (rc == -1 )
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163 {
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164 close(s);
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165 return(-1);
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166 }
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167 }
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168 if(type == NETSOCKET_UDP)
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169 {
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170 /* bind to all addresses for now */
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171 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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172 {
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173 close(s);
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174 return(-1);
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175 }
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176
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177 /* specify default recipient for read/write */
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178 sa.sin_addr.s_addr = saddr->s_addr;
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179 if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)
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180 {
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181 close(s);
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182 return(-1);
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183 }
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184 }
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185
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186
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187 return(s);
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188 }
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189
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190 struct in_addr *make_addr(char *host)
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191 {
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192 struct hostent *hp;
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193 static struct in_addr addr;
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194 char myname[MAXHOSTNAMELEN + 1];
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195
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196 if(host == NULL || strlen(host) == 0)
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197 {
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198 gethostname(myname,MAXHOSTNAMELEN);
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199 hp = gethostbyname(myname);
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200 if(hp != NULL)
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201 {
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202 return (struct in_addr *) *hp->h_addr_list;
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203 }
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204 }else{
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205 addr.s_addr = inet_addr(host);
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206 if(addr.s_addr != -1)
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207 {
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208 return &addr;
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209 }
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210 hp = gethostbyname(host);
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211 if(hp != NULL)
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212 {
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213 return (struct in_addr *) *hp->h_addr_list;
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214 }
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215 }
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216 return NULL;
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217 }
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218
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219 /* Sets a file descriptor to close on exec. "flag" is 1 to close on exec, 0 to
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220 * leave open across exec.
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221 * -- EJB 7/31/2000
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222 */
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223 int set_fd_close_on_exec(int fd, int flag)
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224 {
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225 int oldflags = fcntl(fd,F_GETFL);
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226 int newflags;
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227
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228 if(flag)
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229 newflags = oldflags | FD_CLOEXEC;
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230 else
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231 newflags = oldflags & (~FD_CLOEXEC);
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232
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233 if(newflags==oldflags)
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234 return 0;
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235 return fcntl(fd,F_SETFL,(long)newflags);
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236 }
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237
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