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/*
* write.c
*
* Copyright (c) 2002 Archie L. Cobbs
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Archie L. Cobbs;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties
*
* THIS SOFTWARE IS BEING PROVIDED BY ARCHIE L. COBBS AS IS", AND TO
* THE MAXIMUM EXTENT PERMITTED BY LAW, ARCHIE L. COBBS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* ARCHIE L. COBBS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL ARCHIE L. COBBS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ARCHIE L. COBBS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "ngctl.h"
#define BUF_SIZE 8192
static int WriteCmd(int ac, char **av);
const struct ngcmd write_cmd = {
WriteCmd,
"write hook < -f file | byte ... >",
"Send a data packet down the hook named by \"hook\".",
"The data may be contained in a file, or may be described directly"
" on the command line by supplying a sequence of bytes.",
{ "w" }
};
static int
WriteCmd(int ac, char **av)
{
u_int32_t sagbuf[64];
struct sockaddr_ng *sag = (struct sockaddr_ng *)sagbuf;
u_char buf[BUF_SIZE];
const char *hook;
FILE *fp;
u_int len;
int byte;
int i;
/* Get arguments */
if (ac < 3)
return(CMDRTN_USAGE);
hook = av[1];
/* Get data */
if (strcmp(av[2], "-f") == 0) {
if (ac != 4)
return(CMDRTN_USAGE);
if ((fp = fopen(av[3], "r")) == NULL) {
warn("can't read file \"%s\"", av[3]);
return(CMDRTN_ERROR);
}
if ((len = fread(buf, 1, sizeof(buf), fp)) == 0) {
if (ferror(fp))
warn("can't read file \"%s\"", av[3]);
else
warnx("file \"%s\" is empty", av[3]);
fclose(fp);
return(CMDRTN_ERROR);
}
fclose(fp);
} else {
for (i = 2, len = 0; i < ac && len < sizeof(buf); i++, len++) {
if (sscanf(av[i], "%i", &byte) != 1
|| (byte < -128 || byte > 255)) {
warnx("invalid byte \"%s\"", av[i]);
return(CMDRTN_ERROR);
}
buf[len] = (u_char)byte;
}
if (len == 0)
return(CMDRTN_USAGE);
}
/* Send data */
sag->sg_len = 3 + strlen(hook);
sag->sg_family = AF_NETGRAPH;
strlcpy(sag->sg_data, hook, sizeof(sagbuf) - 2);
if (sendto(dsock, buf, len,
0, (struct sockaddr *)sag, sag->sg_len) == -1) {
warn("writing to hook \"%s\"", hook);
return(CMDRTN_ERROR);
}
/* Done */
return(CMDRTN_OK);
}
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