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/*
Copyright (C) 2006 Renaissance Technologies Corp.
main developer: HP Wei <hp@rentec.com>
Copyright (C) 2005 Renaissance Technologies Corp.
Copyright (C) 2001 Renaissance Technologies Corp.
main developer: HP Wei <hp@rentec.com>
codes in this file are extracted and modified from sends.c
Copyright (C) 2000 Aaron Hillegass <aaron@classmax.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "rttmain.h"
#include <net/if.h>
#ifdef _SUN
#include <sys/sockio.h> /* define SIOCGIFADDR */
#else
#include <linux/sockios.h>
#endif
extern char * my_MCAST_ADDR;
extern int my_PORT;
extern int my_TTL;
extern int my_LOOP;
extern char * my_IFname;
/* buffer for sending (same structure as those in sends.c */
int *mode_ptr; /* char type would cause alignment problem on Sparc */
int *current_page_ptr;
int *total_bytes_ptr;
char *data_ptr;
char send_buff[PAGE_BUFFSIZE];
int pageSize;
/* Send socket */
int send_fd;
#ifndef IPV6
struct sockaddr_in send_addr;
#else
struct sockaddr_in6 send_addr;
#endif
/*
set_mode sets the caster into a new mode.
modes are defined in main.h:
*/
void set_mode(int new_mode)
{
*mode_ptr = htonl(new_mode);
}
/* init_sends initializes the send buffer */
void init_sends(int npagesize)
{
pageSize = (npagesize>PAGE_SIZE) ? PAGE_SIZE : npagesize;
mode_ptr = (int *)send_buff; /* hp: add (int*) */
current_page_ptr = (int *) (mode_ptr + 1);
total_bytes_ptr = (int *)(current_page_ptr + 1);
data_ptr = (char *)(total_bytes_ptr + 1);
send_fd = send_socket(&send_addr, my_MCAST_ADDR, my_PORT);
/******* change MULTICAST_IF ********/
if (my_IFname != NULL && mcast_set_if(send_fd, my_IFname, 0)<0)
perror("init_sends(): when set MULTICAST_IF\n");
/* set multicast_ttl such that UDP can go to 2nd subnetwork */
if (mcast_set_ttl(send_fd, my_TTL) < 0)
perror("init_sends(): when set MULTICAST_TTL\n");
/* disable multicast_loop such that there is no echo back on master */
if (mcast_set_loop(send_fd, my_LOOP) < 0)
perror("init_sends(): when set MULTICAST_LOOP\n");
/* put dummy contents into send (UDP) buffer */
memset(data_ptr, 1, PAGE_SIZE);
}
/*
send_buffer will send the buffer with the file information
out to the socket connection with the catcher.
*/
int send_buffer(int bytes_read)
{
/* Else send the data */
if(sendto(send_fd, send_buff, bytes_read + HEAD_SIZE,
0, (const struct sockaddr *)&send_addr, sizeof(send_addr)) < 0) {
perror("Sending packet");
exit(1);
}
return (1);
}
/*
send_page takes a page from the current file and controls
sending it out the socket to the catcher. It calls send_buffer
to do the actuall call to sendto.
*/
int send_page(int page)
{
if (verbose>=2) fprintf(stderr, "in send_page\n");
*total_bytes_ptr = htonl(pageSize+HEAD_SIZE);
*current_page_ptr = htonl(page);
return send_buffer(pageSize);
}
void send_cmd(int code, int pages)
{
*mode_ptr = htonl(code);
*current_page_ptr = htonl(pages);
*total_bytes_ptr = htonl(HEAD_SIZE);
send_buffer(0);
}
void send_all_done_cmd()
{
*mode_ptr = htonl(ALL_DONE_CMD);
*current_page_ptr = 0;
*total_bytes_ptr = htonl(HEAD_SIZE) ;
send_buffer(0);
if (verbose) fprintf(stderr, "(ALL DONE)\n");
}
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