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git://xwords.git.sourceforge.net/gitroot/xwords/xwords
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543 lines
17 KiB
C
543 lines
17 KiB
C
/* -*- compile-command: "make rq"; -*- */
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/*
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* Copyright 2010 by Eric House (xwords@eehouse.org). All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <assert.h>
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#include <linux/un.h>
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#include "xwrelay.h"
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#ifndef DEFAULT_PORT
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# define DEFAULT_PORT 10998
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#endif
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#ifndef DEFAULT_HOST
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# define DEFAULT_HOST "localhost"
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#endif
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#define MAX_CONN_NAMES 128
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static const char* g_host = DEFAULT_HOST;
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static int g_port = DEFAULT_PORT;
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/*
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* Query:
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* list of all public games by language and number of players
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*
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* For debugging (localhost only, maybe)
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* count of all games in-play (cid!=null)
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*/
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static void
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usage( const char * const argv0 )
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{
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fprintf( stderr, "usage: %s \\\n", argv0 );
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fprintf( stderr, "\t[-p <port>] # (default %d) \\\n", DEFAULT_PORT );
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fprintf( stderr, "\t[-a <host>] # (default: %s) \\\n", DEFAULT_HOST );
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fprintf( stderr, "\t[-r] # list open public rooms \\\n" );
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fprintf( stderr, "\t[-f <connName:devid> # fetch message > stdout or file \\\n" );
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fprintf( stderr, "\t[-l <n>] # language for rooms "
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"(1=English default) \\\n" );
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fprintf( stderr, "\t[-n <n>] # number of players (2 default) \\\n" );
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fprintf( stderr, "\t[-b <path>]* # nbs socket to be used for -f \\\n" );
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fprintf( stderr, "\t[-o <path>]* # file to be used for -f "
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"(- = stdout, the default) \\\n" );
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fprintf( stderr, "\t[-m <connName/devid> # list msg count \\\n" );
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fprintf( stderr, "\t[-d <connName/devid/seed> # delete game \\\n" );
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exit( 1 );
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}
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#define NUM_PER_LINE 8
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void
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log_hex( const unsigned char* memp, int len, const char* tag )
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{
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const char* hex = "0123456789ABCDEF";
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int i, j;
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int offset = 0;
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while ( offset < len ) {
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char buf[128];
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unsigned char vals[NUM_PER_LINE*3];
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unsigned char* valsp = vals;
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unsigned char chars[NUM_PER_LINE+1];
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unsigned char* charsp = chars;
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int oldOffset = offset;
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for ( i = 0; i < NUM_PER_LINE && offset < len; ++i ) {
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unsigned char byte = memp[offset];
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for ( j = 0; j < 2; ++j ) {
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*valsp++ = hex[(byte & 0xF0) >> 4];
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byte <<= 4;
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}
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*valsp++ = ':';
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byte = memp[offset];
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if ( (byte >= 'A' && byte <= 'Z')
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|| (byte >= 'a' && byte <= 'z')
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|| (byte >= '0' && byte <= '9') ) {
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/* keep it */
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} else {
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byte = '.';
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}
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*charsp++ = byte;
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++offset;
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}
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*(valsp-1) = '\0'; /* -1 to overwrite ':' */
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*charsp = '\0';
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if ( (NULL == tag) || (strlen(tag) + sizeof(vals) >= sizeof(buf)) ) {
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tag = "<tag>";
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}
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snprintf( buf, sizeof(buf), "%s[%d]: %s %s", tag, oldOffset,
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vals, chars );
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fprintf( stderr, "%s\n", buf );
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}
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}
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int
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read_packet( int sock, unsigned char* buf, int buflen )
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{
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int result = -1;
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ssize_t nread;
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unsigned short msgLen;
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nread = recv( sock, &msgLen, sizeof(msgLen), MSG_WAITALL );
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if ( nread == sizeof(msgLen) ) {
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msgLen = ntohs( msgLen );
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if ( msgLen <= buflen ) {
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nread = recv( sock, buf, msgLen, MSG_WAITALL );
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if ( nread == msgLen ) {
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result = nread;
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}
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}
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}
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return result;
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}
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static void
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do_rooms( int sockfd, int lang, int nPlayers )
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{
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unsigned char msg[] = { 0, /* protocol */
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PRX_PUB_ROOMS,
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(unsigned char)lang,
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(unsigned char)nPlayers };
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unsigned short len = htons( sizeof(msg) );
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write( sockfd, &len, sizeof(len) );
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write( sockfd, msg, sizeof(msg) );
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fprintf( stderr, "Waiting for response....\n" );
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ssize_t nRead = recv( sockfd, &len,
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sizeof(len), MSG_WAITALL );
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assert( nRead == sizeof(len) );
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len = ntohs( len );
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char reply[len];
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nRead = recv( sockfd, reply, len, MSG_WAITALL );
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assert( nRead == len );
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char* ptr = reply;
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unsigned short nRooms;
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memcpy( &nRooms, ptr, sizeof(nRooms) );
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ptr += sizeof( nRooms );
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nRooms = ntohs( nRooms );
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int ii;
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char* saveptr;
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for ( ii = 0; ii < nRooms; ++ii ) {
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char* str = strtok_r( ptr, "\n", &saveptr );
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fprintf( stdout, "%s\n", str );
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ptr = NULL;
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}
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}
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static void
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write_connnames( int sockfd, char cmd,
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const char** connNames, int nConnNames )
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{
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unsigned short len, netlen;
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int ii;
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for ( len = 0, ii = 0; ii < nConnNames; ++ii ) {
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len += 1 + strlen( connNames[ii] );
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}
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unsigned char hdr[] = { 0, (unsigned char)cmd };
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unsigned short netNConnNames = htons( nConnNames );
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netlen = sizeof(hdr) + sizeof( netNConnNames ) + len;
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netlen = htons( netlen );
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write( sockfd, &netlen, sizeof(netlen) );
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write( sockfd, &hdr, sizeof(hdr) );
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write( sockfd, &netNConnNames, sizeof(netNConnNames) );
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for ( len = 0, ii = 0; ii < nConnNames; ++ii ) {
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write( sockfd, connNames[ii], strlen(connNames[ii]) );
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write( sockfd, "\n", 1 );
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}
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}
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static void
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do_msgs( int sockfd, const char** connNames, int nConnNames )
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{
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write_connnames( sockfd, PRX_HAS_MSGS, connNames, nConnNames );
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fprintf( stderr, "Waiting for response....\n" );
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unsigned char reply[1024];
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int nRead = read_packet( sockfd, reply, sizeof(reply) );
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if ( nRead > 2 ) {
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const unsigned char* bufp = reply;
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const unsigned char* const end = bufp + nRead;
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unsigned short count;
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memcpy( &count, bufp, sizeof( count ) );
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bufp += sizeof( count );
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count = ntohs( count );
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assert( count == nConnNames );
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fprintf( stderr, "got count: %d\n", count );
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int ii;
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for ( ii = 0; ii < nConnNames && bufp < end; ++ii ) {
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memcpy( &count, bufp, sizeof( count ) );
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bufp += sizeof( count );
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count = ntohs( count );
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fprintf( stdout, "%s -- %d\n", connNames[ii], count );
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}
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}
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} /* do_msgs */
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static int
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connect_socket( void )
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{
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int sockfd = socket( AF_INET, SOCK_STREAM, 0 );
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struct sockaddr_in to_sock;
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memset( &to_sock, 0, sizeof(to_sock) );
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to_sock.sin_family = AF_INET;
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to_sock.sin_port = htons( g_port );
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struct timeval tv;
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tv.tv_sec = 5; /* seconds */
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tv.tv_usec = 0; /* microseconds */
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int result = setsockopt( sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv) );
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if ( 0 != result ) {
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fprintf( stderr, "setsockopt=>%d (%s)", errno, strerror(errno) );
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assert( 0 );
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}
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result = setsockopt( sockfd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv) );
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if ( 0 != result ) {
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fprintf( stderr, "setsockopt=>%d (%s)", errno, strerror(errno) );
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assert( 0 );
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}
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struct hostent* hostip;
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hostip = gethostbyname( g_host );
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memcpy( &(to_sock.sin_addr.s_addr), hostip->h_addr_list[0],
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sizeof(hostip->h_addr_list[0] ) );
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if ( 0 != connect( sockfd, (const struct sockaddr*)&to_sock,
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sizeof(to_sock) ) ) {
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fprintf( stderr, "connect failed: %d (%s)\n", errno, strerror(errno) );
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exit( 1 );
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}
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return sockfd;
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}
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/* This comes in already formatted (see relay_sendNoConn_curses). So all we
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need to do is open a socket and send it to the relay. Later we can
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coalesce, though that should happen in the (linux) client. */
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static void
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send_msg( const unsigned char* buf, int len )
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{
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// log_hex( buf, len, __func__ );
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int sock = connect_socket();
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assert( 0 <= sock );
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unsigned char hdr[] = { 0, PRX_PUT_MSGS };
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unsigned short netlen = htons( sizeof(hdr) + len );
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ssize_t nwritten = write( sock, &netlen, sizeof(netlen) );
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assert( nwritten == sizeof(netlen) );
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nwritten = write( sock, hdr, sizeof(hdr) );
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assert( nwritten == sizeof(hdr) );
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nwritten = write( sock, buf, len );
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assert( nwritten == len );
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close( sock );
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}
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static void
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do_fetch( int sockfd, const char** connNames, int nConnNames,
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const char** pipes, int nPipes, const char* nbs )
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{
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write_connnames( sockfd, PRX_GET_MSGS, connNames, nConnNames );
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unsigned char reply[1024];
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int nRead = read_packet( sockfd, reply, sizeof(reply) );
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if ( nRead > 2 ) {
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int ii;
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const unsigned char* bufp = reply;
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const unsigned char* const end = bufp + nRead;
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unsigned short count;
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memcpy( &count, bufp, sizeof( count ) );
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bufp += sizeof( count );
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count = ntohs( count );
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assert( count <= nConnNames );
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/* Now we have an array of <countPerDev> <len><len bytes> pairs. Just
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write em as long as it makes sense. countPerDev makes no sense as
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other than 1 unless the UI is changed so I don't have to write to
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STDOUT -- e.g. by passing in named pipes to correspond to each
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deviceid provided */
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for ( ii = 0; ii < count && bufp < end; ++ii ) {
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int fd = STDOUT_FILENO;
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int nbsfd = -1;
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unsigned short countPerDev;
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memcpy( &countPerDev, bufp, sizeof( countPerDev ) );
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bufp += sizeof( countPerDev );
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countPerDev = ntohs( countPerDev );
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if ( ii < nPipes && 0 != strcmp( pipes[ii], "-" ) ) {
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fd = open( pipes[ii], O_RDWR | O_CREAT, S_IRUSR | S_IWUSR );
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if ( fd < 0 ) {
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fprintf( stderr, "open(%s) failed: %s\n", pipes[ii],
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strerror(errno) );
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exit( 1 );
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}
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} else if ( NULL != nbs ) {
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nbsfd = socket( AF_UNIX, SOCK_STREAM, 0 );
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assert( 0 <= nbsfd );
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struct sockaddr_un addr;
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addr.sun_family = AF_UNIX;
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strcpy( addr.sun_path, nbs );
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for ( ; ; ) {
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if ( 0 == connect( nbsfd, (struct sockaddr*)&addr,
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sizeof(addr) ) ) {
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break;
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}
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switch( errno ) {
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case ECONNREFUSED:
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case ENOENT:
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usleep( 250000 );
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break;
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default:
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fprintf( stderr, "%s: connect()=>%d (%s)\n", __func__,
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errno, strerror(errno) );
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assert( false );
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}
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}
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fd = nbsfd;
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}
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unsigned short len;
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ssize_t nwritten;
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while ( bufp < end && countPerDev-- > 0 ) {
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memcpy( &len, bufp, sizeof( len ) );
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len = ntohs( len ) + sizeof( len );
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if ( bufp + len > end ) {
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break;
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}
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nwritten = write( fd, bufp, len );
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assert( nwritten == len );
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bufp += len;
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}
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assert( bufp == end );
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len = 0;
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nwritten = write( fd, &len, sizeof(len) );
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assert( nwritten == sizeof(len) );
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for ( ii = 0; -1 != nbsfd; ++ii ) {
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short len;
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ssize_t nRead = read( nbsfd, &len, sizeof(len) );
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if ( sizeof(len) != nRead ) {
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break;
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} else if ( 0 == len ) {
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// fprintf( stderr, "%s: read 0; done\n", __func__ );
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break;
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}
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len = ntohs( len );
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// fprintf( stderr, "%s: read size of %d\n", __func__, len );
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unsigned char buf[len];
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if ( len != read( nbsfd, buf, len ) ) {
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break;
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}
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// fprintf( stderr, "%s: read %d bytes\n", __func__, len );
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send_msg( buf, len );
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}
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// fprintf( stderr, "%s: DONE reading from pipe\n", __func__ );
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if ( fd != STDOUT_FILENO ) {
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close( fd );
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}
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}
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if ( bufp != end ) {
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fprintf( stderr, "error: message not internally as expected\n" );
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}
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}
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} /* do_fetch */
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static void
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do_deletes( int sockfd, const char** connNames, int nConnNames )
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{
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int ii;
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char buf[4096];
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size_t nused = 0;
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for ( ii = 0; ii < nConnNames; ++ii ) {
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char tmp[128];
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assert( strlen(connNames[ii]) < sizeof(tmp)-1 );
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strcpy( tmp, connNames[ii] );
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char* seedp = strrchr( tmp, '/' );
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assert( !!seedp );
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*(seedp++) = '\0'; /* skip */
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unsigned int seed;
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sscanf( seedp, "%X", &seed );
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short netshort = htons( (short)seed );
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memcpy( &buf[nused], &netshort, sizeof(netshort) );
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nused += sizeof(netshort);
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nused += sprintf( &buf[nused], "%s", tmp );
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buf[nused++] = '\n';
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}
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assert( nused < sizeof(buf) );
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unsigned char hdr[] = { 0, PRX_DEVICE_GONE };
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/* total len */
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short num = htons( sizeof(hdr) + 2 + nused );
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write( sockfd, &num, sizeof(num) );
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/* header */
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write( sockfd, hdr, sizeof(hdr) );
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/* count */
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num = htons( nConnNames );
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write( sockfd, &num, sizeof(num) );
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/* buffer */
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write( sockfd, buf, nused );
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unsigned char reply[2];
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int nRead = read_packet( sockfd, reply, sizeof(reply) );
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if ( nRead != 0 ) {
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fprintf( stderr, "%s: nRead=%d; errno=%d (%s)\n", __func__,
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nRead, errno, strerror(errno) );
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}
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} /* do_deletes */
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int
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main( int argc, char * const argv[] )
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{
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// fprintf( stderr, "rq called\n" );
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int lang = 1;
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int nPlayers = 2;
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int doWhat = 0;
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const int doRooms = 1;
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const int doMgs = 2;
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const int doDeletes = 4;
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const int doFetch = 8;
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char const* connNames[MAX_CONN_NAMES];
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int nConnNames = 0;
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const char* pipes[MAX_CONN_NAMES];
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int nPipes = 0;
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const char* nbs = NULL;
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for ( ; ; ) {
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int opt = getopt( argc, argv, "a:b:d:f:p:rl:n:m:o:" );
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if ( opt < 0 ) {
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break;
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}
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switch ( opt ) {
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case 'a':
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g_host = optarg;
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break;
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case 'b':
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nbs = optarg;
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break;
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case 'd':
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assert( nConnNames < MAX_CONN_NAMES - 1 );
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connNames[nConnNames++] = optarg;
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doWhat |= doDeletes;
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break;
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case 'f':
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connNames[nConnNames++] = optarg;
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doWhat |= doFetch;
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break;
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case 'l':
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lang = atoi(optarg);
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break;
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case 'm':
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assert( nConnNames < MAX_CONN_NAMES - 1 );
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connNames[nConnNames++] = optarg;
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doWhat |= doMgs;
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break;
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case 'n':
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nPlayers = atoi(optarg);
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break;
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case 'o':
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assert( nPipes < MAX_CONN_NAMES - 1 );
|
|
pipes[nPipes++] = optarg;
|
|
break;
|
|
case 'p':
|
|
g_port = atoi(optarg);
|
|
break;
|
|
case 'r':
|
|
doWhat |= doRooms;
|
|
break;
|
|
default:
|
|
usage( argv[0] );
|
|
break;
|
|
}
|
|
}
|
|
|
|
// fprintf( stderr, "got port %d, host %s\n", g_port, g_host );
|
|
|
|
int sockfd = connect_socket();
|
|
|
|
switch ( doWhat ) {
|
|
case 0:
|
|
fprintf( stderr, "no command given\n" );
|
|
usage( argv[0] );
|
|
break;
|
|
case doRooms:
|
|
do_rooms( sockfd, lang, nPlayers );
|
|
break;
|
|
case doMgs:
|
|
do_msgs( sockfd, connNames, nConnNames );
|
|
break;
|
|
case doDeletes:
|
|
do_deletes( sockfd, connNames, nConnNames );
|
|
break;
|
|
case doFetch:
|
|
do_fetch( sockfd, connNames, nConnNames, pipes, nPipes, nbs );
|
|
break;
|
|
default:
|
|
fprintf( stderr, "conflicting options given\n" );
|
|
usage( argv[0] );
|
|
}
|
|
|
|
close( sockfd );
|
|
|
|
return 0;
|
|
}
|