1 /***************************************************************************
2 * Copyright (C) 2007 by Prabakaran Thirumalai *
3 * praba_tuty@yahoo.com *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
25 #define MSG_NOSIGNAL 0
27 TCPClient::TCPClient()
29 isConnectedFlag
=false;
32 respPkt
= new ResponsePacket();
33 pktHdr
= new PacketHeader();
36 TCPClient::~TCPClient()
38 if (isConnectedFlag
) disconnect();
42 DbRetVal
TCPClient::send(NetworkPacketType type
)
46 printError(ErrNoConnection
, "Connection lost with the peer.");
47 return ErrNoConnection
;
49 pktHdr
->packetType
= type
;
50 pktHdr
->packetLength
= 0;
52 if ((numbytes
=os::send(sockfd
, pktHdr
, sizeof(PacketHeader
), MSG_NOSIGNAL
)) == -1) {
54 printError(ErrNoConnection
, "connection not present");
55 isConnectedFlag
= false;
56 return ErrNoConnection
;
58 printError(ErrOS
, "Unable to send the packet");
61 isConnectedFlag
= false;
62 return ErrNoConnection
;
67 DbRetVal
TCPClient::send(NetworkPacketType type
, int stmtid
)
71 printError(ErrNoConnection
, "Connection lost with the peer.");
72 return ErrNoConnection
;
74 pktHdr
->packetType
= type
;
75 pktHdr
->packetLength
= 0;
76 pktHdr
->stmtID
= stmtid
;
78 if ((numbytes
=os::send(sockfd
, pktHdr
, sizeof(PacketHeader
), MSG_NOSIGNAL
)) == -1) {
80 printError(ErrNoConnection
, "connection not present");
81 isConnectedFlag
= false;
82 return ErrNoConnection
;
84 printError(ErrOS
, "Unable to send the packet");
87 isConnectedFlag
= false;
88 return ErrNoConnection
;
92 DbRetVal
TCPClient::send(NetworkPacketType type
, char *buf
, int len
)
96 printError(ErrNoConnection
, "Connection lost with the peer.");
97 return ErrNoConnection
;
99 // printf("NW:TCP Send\n");
100 //void* totalBuffer = malloc(sizeof(PacketHeader)+ len);
101 //PacketHeader *hdr= new PacketHeader();
102 pktHdr
->packetType
= type
;
103 pktHdr
->packetLength
= len
;
104 pktHdr
->srcNetworkID
= networkid
;
107 //memcpy(((char*)totalBuffer) + sizeof(PacketHeader) , buf, len);
109 if ((numbytes
=os::send(sockfd
, pktHdr
, sizeof(PacketHeader
), MSG_NOSIGNAL
)) == -1) {
110 if (errno
== EPIPE
) {
111 printError(ErrNoConnection
, "connection not present");
112 isConnectedFlag
= false;
113 return ErrNoConnection
;
115 printError(ErrOS
, "Unable to send the packet");
118 isConnectedFlag
= false;
119 return ErrNoConnection
;
121 // printf("Sent bytes %d\n", numbytes);
122 if ((numbytes
=os::send(sockfd
, buf
, len
, MSG_NOSIGNAL
)) == -1) {
123 if (errno
== EPIPE
) {
124 printError(ErrNoConnection
, "connection not present");
125 isConnectedFlag
= false;
126 return ErrNoConnection
;
128 printError(ErrOS
, "Unable to send the packet");
131 isConnectedFlag
= false;
132 return ErrNoConnection
;
134 // printf("Sent bytes %d\n", numbytes);
139 DbRetVal
TCPClient::receive()
142 // printf("NW:TCP receive\n");
145 FD_SET(sockfd
, &fdset
);
146 struct timeval timeout
;
147 timeout
.tv_sec
= Conf::config
.getNetworkResponseTimeout();
149 int ret
= os::select(sockfd
+1, &fdset
, 0, 0, &timeout
);
151 printError(ErrPeerTimeOut
,"Response timeout for peer site");
154 isConnectedFlag
= false;
155 return ErrPeerTimeOut
;
157 socklen_t len
= sizeof(struct sockaddr
);
158 int numbytes
= os::recv(sockfd
, respPkt
, sizeof(ResponsePacket
), 0);
161 printError(ErrOS
, "Unable to receive response from peer");
164 isConnectedFlag
= false;
165 return ErrNoConnection
;
167 return respPkt
->errRetVal
;
170 DbRetVal
TCPClient::connect()
172 //printf("NW:TCP connect %s %d %d\n", hostName, port, networkid);
173 //TODO::send endian to the peer site
174 //do not do endian conversion here. it will be done at the server side
175 isConnectedFlag
= false;
178 if ((he
=gethostbyname(hostName
)) == NULL
) { // get the host info
179 printError(ErrOS
,"Unable to get the peer host name");
182 if ((sockfd
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1) {
183 printError(ErrOS
,"Unable to create socket to peer host name");
186 srvAddr
.sin_family
= AF_INET
; // host byte order
187 srvAddr
.sin_port
= htons(port
); // short, network byte order
188 srvAddr
.sin_addr
= *((struct in_addr
*)he
->h_addr
);
189 memset(&(srvAddr
.sin_zero
), '\0', 8); // zero the rest of the struct
190 if (::connect(sockfd
, (struct sockaddr
*) & srvAddr
, sizeof(struct sockaddr
))
193 printError(ErrOS
, "Unable to connect to peer site");
196 // printf("NW:TCP connecting\n");
199 FD_SET(sockfd
, &fdset
);
200 struct timeval timeout
;
201 timeout
.tv_sec
= Conf::config
.getNetworkConnectTimeout();
203 int ret
= os::select(sockfd
+1, &fdset
, 0, 0, &timeout
);
205 printError(ErrPeerTimeOut
,"Response timeout for peer site");
206 return ErrPeerTimeOut
;
209 socklen_t len
= sizeof(struct sockaddr
);
210 numbytes
= os::recv(sockfd
, &response
, 4, 0);
213 printError(ErrOS
, "Unable to receive response from peer");
216 // printf("Response from peer site is %d\n", response);
217 // if (response != 1) return ErrPeerResponse;
219 //packet header information
220 pktHdr
->srcNetworkID
= networkid
;
222 isConnectedFlag
= true;
226 DbRetVal
TCPClient::disconnect()
228 if (isConnectedFlag
) {
229 // printf("NW:TCP disconnect %s %d\n", hostName, port);
230 pktHdr
->packetType
= SQL_NW_PKT_DISCONNECT
;
231 pktHdr
->packetLength
= 0;
233 if ((numbytes
=os::send(sockfd
, pktHdr
, sizeof(PacketHeader
), MSG_NOSIGNAL
)) == -1) {
234 if (errno
== EPIPE
) {
235 printError(ErrNoConnection
, "connection not present");
236 isConnectedFlag
= false;
237 return ErrNoConnection
;
239 printError(ErrOS
, "Unable to send the packet");
242 isConnectedFlag
= false;
243 return ErrNoConnection
;
245 // printf("Sent bytes %d\n", numbytes);
246 DbRetVal rv
= receive();
247 isConnectedFlag
= false;