261 lines
6.6 KiB
C
261 lines
6.6 KiB
C
/*
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* $Id: imgsock_manager.c 44 2011-02-15 12:32:29Z kaori $
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*
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* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2011, Professor Benoit Macq
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* Copyright (c) 2010-2011, Kaori Hagihara
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include <stdlib.h>
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#include <netdb.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "imgsock_manager.h"
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#define BUF_LEN 256
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int open_listeningsocket()
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{
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int listening_socket;
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struct sockaddr_in sin;
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int sock_optval = 1;
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int port = 5000;
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listening_socket = socket(AF_INET, SOCK_STREAM, 0);
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if ( listening_socket == -1 ){
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perror("socket");
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exit(1);
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}
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if ( setsockopt(listening_socket, SOL_SOCKET, SO_REUSEADDR,
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&sock_optval, sizeof(sock_optval)) == -1 ){
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perror("setsockopt");
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exit(1);
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}
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sin.sin_family = AF_INET;
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sin.sin_port = htons(port);
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sin.sin_addr.s_addr = htonl(INADDR_ANY);
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if ( bind(listening_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0 ){
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perror("bind");
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exit(1);
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}
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if( listen(listening_socket, SOMAXCONN) == -1){
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perror("listen");
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exit(1);
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}
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printf("port %d is listened\n", port);
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return listening_socket;
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}
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msgtype_t identify_clientmsg( int connected_socket)
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{
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int read_size;
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char buf[BUF_LEN];
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char *magicid[] = { "JPT-stream", "PNM request", "XML request", "CID request", "CID destroy", "JP2 save", "QUIT"};
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read_size = read_line( connected_socket, buf);
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if( read_size == 0){
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fprintf( stderr, "Error to read the header of client message\n");
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return ERROR;
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}
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for( int i=0; i<NUM_OF_MSGTYPES; i++){
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if( strncasecmp( magicid[i], buf, strlen(magicid[i])) == 0){
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printf("Client message: %s\n", magicid[i]);
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return i;
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}
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}
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fprintf( stderr, "Cannot identify client message type\n");
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return ERROR;
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}
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Byte_t * receive_JPTstream( int connected_socket, char *target, char *cid, int *streamlen)
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{
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Byte_t *jptstream=NULL, *ptr;
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char buf[BUF_LEN], versionstring[] = "version 1.0";
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int linelen, redlen, remlen;
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target[0] = 0;
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cid[0] = 0;
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if((linelen = read_line( connected_socket, buf)) == 0)
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return NULL;
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if( strncmp( versionstring, buf, strlen(versionstring))!=0){
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fprintf( stderr, "Wrong format\n");
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return NULL;
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}
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if((linelen = read_line( connected_socket, buf)) == 0)
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return NULL;
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if( strstr( buf, "jp2")){
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// register cid option
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strcpy( target, buf);
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if((linelen = read_line( connected_socket, buf)) == 0)
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return NULL;
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strcpy( cid, buf);
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if((linelen = read_line( connected_socket, buf)) == 0)
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return NULL;
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}
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*streamlen = atoi( buf);
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fprintf( stderr, "Reading Data length: %d\n", *streamlen);
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jptstream = (unsigned char *)malloc( (*streamlen));
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ptr = jptstream;
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remlen = (*streamlen);
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while( remlen > 0){
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redlen = read( connected_socket, ptr, remlen);
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if( redlen == -1){
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fprintf( stderr, "read jptstream error\n");
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break;
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}
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remlen -= redlen;
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ptr = ptr + redlen;
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}
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fprintf( stderr, " done\n");
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return jptstream;
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}
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void send_stream( int connected_socket, void *stream, int length);
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void send_XMLstream( int connected_socket, Byte_t *xmlstream, int length)
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{
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Byte_t header[5];
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header[0] = 'X';
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header[1] = 'M';
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header[2] = 'L';
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header[3] = (length >> 8) & 0xff;
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header[4] = length & 0xff;
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send_stream( connected_socket, header, 5);
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send_stream( connected_socket, xmlstream, length);
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}
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void send_CIDstream( int connected_socket, char *cid, int cidlen)
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{
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Byte_t header[4];
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header[0] = 'C';
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header[1] = 'I';
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header[2] = 'D';
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header[3] = cidlen & 0xff;
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send_stream( connected_socket, header, 4);
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send_stream( connected_socket, cid, cidlen);
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}
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void send_PNMstream( int connected_socket, Byte_t *pnmstream, unsigned int width, unsigned int height, unsigned int numofcomp, Byte_t maxval)
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{
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int pnmlen = 0;
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Byte_t header[7];
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pnmlen = width*height*numofcomp;
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header[0] = 'P';
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header[1] = numofcomp==3 ? 6:5;
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header[2] = (width >> 8) & 0xff;
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header[3] = width & 0xff;
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header[4] = (height >> 8) & 0xff;
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header[5] = height & 0xff;
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header[6] = maxval;
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send_stream( connected_socket, header, 7);
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send_stream( connected_socket, pnmstream, pnmlen);
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}
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void send_stream( int connected_socket, void *stream, int length)
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{
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void *ptr = stream;
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int remlen = length;
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while( remlen > 0){
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int sentlen = write( connected_socket, ptr, remlen);
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if( sentlen == -1){
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fprintf( stderr, "sending stream error\n");
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break;
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}
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remlen = remlen - sentlen;
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ptr = ptr + sentlen;
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}
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}
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int read_line(int socket, char *p)
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{
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int len = 0;
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while (1){
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int ret;
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ret = read(socket, p, 1);
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if ( ret == -1 ){
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perror("read");
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exit(1);
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} else if ( ret == 0 ){
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break;
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}
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if ( *p == '\n' )
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break;
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p++;
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len++;
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}
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*p = '\0';
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if( len == 0)
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fprintf( stderr, "Header read error\n");
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return len;
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}
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void response_signal( int connected_socket, bool succeed)
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{
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Byte_t code;
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if( succeed)
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code = 1;
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else
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code = 0;
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if( write( connected_socket, &code, 1) != 1)
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fprintf( stderr, "Response signalling error\n");
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}
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