158 lines
3.2 KiB
C
158 lines
3.2 KiB
C
/*
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* The Qubes OS Project, http://www.qubes-os.org
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*
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* Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "libvchan.h"
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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 <string.h>
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#include <time.h>
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int libvchan_write_all(struct libvchan *ctrl, char *buf, int size)
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{
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int written = 0;
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int ret;
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while (written < size) {
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ret = libvchan_write(ctrl, buf + written, size - written);
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if (ret <= 0) {
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perror("write");
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exit(1);
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}
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written += ret;
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}
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return size;
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}
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int write_all(int fd, char *buf, int size)
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{
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int written = 0;
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int ret;
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while (written < size) {
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ret = write(fd, buf + written, size - written);
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if (ret <= 0) {
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perror("write");
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exit(1);
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}
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written += ret;
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}
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return size;
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}
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void usage()
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{
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fprintf(stderr, "usage:\n\tnode server [read|write] nodeid\n"
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"or\n" "\tnode client [read|write] domainid nodeid\n");
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exit(1);
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}
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#define BUFSIZE 5000
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char buf[BUFSIZE];
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void reader(struct libvchan *ctrl)
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{
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int size;
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for (;;) {
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size = rand() % (BUFSIZE - 1) + 1;
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size = libvchan_read(ctrl, buf, size);
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fprintf(stderr, "#");
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if (size < 0) {
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perror("read vchan");
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libvchan_close(ctrl);
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exit(1);
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}
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if (size == 0)
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break;
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size = write_all(1, buf, size);
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if (size < 0) {
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perror("stdout write");
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exit(1);
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}
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if (size == 0) {
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perror("write size=0?\n");
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exit(1);
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}
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}
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}
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void writer(struct libvchan *ctrl)
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{
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int size;
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for (;;) {
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size = rand() % (BUFSIZE - 1) + 1;
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size = read(0, buf, size);
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if (size < 0) {
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perror("read stdin");
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libvchan_close(ctrl);
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exit(1);
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}
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if (size == 0)
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break;
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size = libvchan_write_all(ctrl, buf, size);
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fprintf(stderr, "#");
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if (size < 0) {
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perror("vchan write");
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exit(1);
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}
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if (size == 0) {
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perror("write size=0?\n");
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exit(1);
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}
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}
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}
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/**
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Simple libvchan application, both client and server.
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One side does writing, the other side does reading; both from
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standard input/output fds.
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*/
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int main(int argc, char **argv)
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{
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int seed = time(0);
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struct libvchan *ctrl = 0;
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int wr;
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if (argc < 4)
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usage();
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if (!strcmp(argv[2], "read"))
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wr = 0;
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else if (!strcmp(argv[2], "write"))
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wr = 1;
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else
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usage();
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if (!strcmp(argv[1], "server"))
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ctrl = libvchan_server_init(atoi(argv[3]));
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else if (!strcmp(argv[1], "client"))
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ctrl = libvchan_client_init(atoi(argv[3]), atoi(argv[4]));
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else
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usage();
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if (!ctrl) {
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perror("libvchan_*_init");
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exit(1);
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}
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srand(seed);
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fprintf(stderr, "seed=%d\n", seed);
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if (wr)
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writer(ctrl);
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else
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reader(ctrl);
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libvchan_close(ctrl);
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return 0;
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}
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