bes  Updated for version 3.20.6
Socket.cc
1 // Socket.cc
2 
3 // This file is part of bes, A C++ back-end server implementation framework
4 // for the OPeNDAP Data Access Protocol.
5 
6 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research
7 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
8 //
9 // This library is free software; you can redistribute it and/or
10 // modify it under the terms of the GNU Lesser General Public
11 // License as published by the Free Software Foundation; either
12 // version 2.1 of the License, or (at your option) any later version.
13 //
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 // Lesser General Public License for more details.
18 //
19 // You should have received a copy of the GNU Lesser General Public
20 // License along with this library; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 //
23 // You can contact University Corporation for Atmospheric Research at
24 // 3080 Center Green Drive, Boulder, CO 80301
25 
26 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
27 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
28 //
29 // Authors:
30 // pwest Patrick West <pwest@ucar.edu>
31 // jgarcia Jose Garcia <jgarcia@ucar.edu>
32 
33 #include "config.h"
34 
35 #include <string>
36 #include <sstream>
37 
38 #include <cstdio>
39 #include <cerrno>
40 #include <cstring>
41 
42 #include <sys/types.h>
43 #include <sys/socket.h>
44 #include <arpa/inet.h>
45 #ifdef HAVE_UNISTD_H
46 #include <unistd.h>
47 #endif
48 
49 #include "Socket.h"
50 #include "BESLog.h"
51 #include "BESInternalError.h"
52 
53 using namespace std;
54 
55 Socket::Socket(int socket, struct sockaddr *addr) :
56  _socket(socket), _connected(true), _listening(false), _addr_set(true)
57 {
58  char ip[46];
59  unsigned int port;
60  /* ... */
61  switch (addr->sa_family) {
62  case AF_INET:
63  inet_ntop(AF_INET, &(((struct sockaddr_in *) addr)->sin_addr), ip, sizeof(ip));
64  port = ntohs (((struct sockaddr_in *)addr)->sin_port);
65  break;
66  case AF_INET6:
67  inet_ntop(AF_INET6, &(((struct sockaddr_in6 *) addr)->sin6_addr), ip, sizeof(ip));
68  port = ntohs (((struct sockaddr_in6 *)addr)->sin6_port);
69  break;
70  default:
71  snprintf(ip, sizeof(ip), "UNKNOWN FAMILY: %d", addr->sa_family);
72  port = 0;
73  break;
74  }
75  _port = port;
76  _ip = ip;
77 }
78 
79 void Socket::close()
80 {
81  if (_connected) {
82  ::close(_socket);
83  _socket = 0;
84  _connected = false;
85  _listening = false;
86  }
87 }
88 
89 void Socket::send(const string &str, int start, int end)
90 {
91  string send_str = str.substr(start, end);
92  int bytes_written = write(_socket, send_str.c_str(), send_str.length());
93  if (bytes_written == -1) {
94  string err("socket failure, writing on stream socket");
95  const char* error_info = strerror(errno);
96  if (error_info) err += " " + (string) error_info;
97  throw BESInternalError(err, __FILE__, __LINE__);
98  }
99 }
100 
101 int Socket::receive(char *inBuff, const int inSize)
102 {
103  int bytesRead = 0;
104 
105  //if ((bytesRead = read(_socket, inBuff, inSize)) < 1) {
106  // check for EINTR and EAGAIN. jhrg 10/30/13
107  errno = 0;
108  while ((bytesRead = read(_socket, inBuff, inSize)) < 1) {
109  if (errno == EINTR || errno == EAGAIN) {
110  // These codes are only returned when no bytes have been read, so
111  // there is no need to update the values of inSize or inBuff.
112  // jhrg 11/6/13
113  *(BESLog::TheLog()) << "Socket::receive: errno: " << strerror(errno) << ", bytesRead: " << bytesRead << endl;
114  errno = 0;
115  continue;
116  }
117 
118  if (bytesRead < 0) { // Error
119  std::ostringstream oss;
120  oss << "Socket::receive: socket failure, reading on stream socket: " << strerror(errno) << ", bytesRead: "
121  << bytesRead;
122  throw BESInternalError(oss.str(), __FILE__, __LINE__);
123  }
124  else if (bytesRead == 0) // EOF
125  return 0;
126  }
127 
128  return bytesRead;
129 }
130 
137 void Socket::dump(ostream &strm) const
138 {
139  strm << BESIndent::LMarg << "Socket::dump - (" << (void *) this << ")" << endl;
140  BESIndent::Indent();
141  strm << BESIndent::LMarg << "socket: " << _socket << endl;
142  strm << BESIndent::LMarg << "is connected? " << _connected << endl;
143  strm << BESIndent::LMarg << "is listening? " << _listening << endl;
144  strm << BESIndent::LMarg << "socket address set? " << _addr_set << endl;
145  if (_addr_set) {
146  strm << BESIndent::LMarg << "socket port: " << _port << endl;
147  strm << BESIndent::LMarg << "socket ip: " << _ip << endl;
148  }
149  BESIndent::UnIndent();
150 }
151 
Socket::dump
virtual void dump(std::ostream &strm) const
dumps information about this object
Definition: Socket.cc:137
BESInternalError
exception thrown if internal error encountered
Definition: BESInternalError.h:43