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/* $OpenBSD: dhcpleasectl.c,v 1.4 2021/06/16 14:06:18 florian Exp $ */
/*
* Copyright (c) 2021 Florian Obser <florian@openbsd.org>
* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
* Copyright (c) 2003 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet6/nd6.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <imsg.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dhcpleased.h"
#include "frontend.h"
#include "parser.h"
__dead void usage(void);
int show_interface_msg(struct imsg *);
struct imsgbuf *ibuf;
__dead void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-s socket] command [argument ...]\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
struct sockaddr_un sun;
struct parse_result *res;
struct imsg imsg;
int ctl_sock;
int done = 0;
int n, verbose = 0;
int ch;
char *sockname;
sockname = _PATH_DHCPLEASED_SOCKET;
while ((ch = getopt(argc, argv, "s:")) != -1) {
switch (ch) {
case 's':
sockname = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (pledge("stdio unix", NULL) == -1)
err(1, "pledge");
/* Parse command line. */
if ((res = parse(argc, argv)) == NULL)
exit(1);
/* Connect to control socket. */
if ((ctl_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
err(1, "socket");
memset(&sun, 0, sizeof(sun));
sun.sun_family = AF_UNIX;
strlcpy(sun.sun_path, sockname, sizeof(sun.sun_path));
if (connect(ctl_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
err(1, "connect: %s", sockname);
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
if ((ibuf = malloc(sizeof(struct imsgbuf))) == NULL)
err(1, NULL);
imsg_init(ibuf, ctl_sock);
done = 0;
/* Process user request. */
switch (res->action) {
case LOG_VERBOSE:
verbose = 1;
/* FALLTHROUGH */
case LOG_BRIEF:
imsg_compose(ibuf, IMSG_CTL_LOG_VERBOSE, 0, 0, -1,
&verbose, sizeof(verbose));
printf("logging request sent.\n");
done = 1;
break;
case SHOW_INTERFACE:
imsg_compose(ibuf, IMSG_CTL_SHOW_INTERFACE_INFO, 0, 0, -1,
&res->if_index, sizeof(res->if_index));
break;
case SEND_REQUEST:
imsg_compose(ibuf, IMSG_CTL_SEND_REQUEST, 0, 0, -1,
&res->if_index, sizeof(res->if_index));
done = 1;
break;
default:
usage();
}
while (ibuf->w.queued)
if (msgbuf_write(&ibuf->w) <= 0 && errno != EAGAIN)
err(1, "write error");
while (!done) {
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
errx(1, "imsg_read error");
if (n == 0)
errx(1, "pipe closed");
while (!done) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
errx(1, "imsg_get error");
if (n == 0)
break;
switch (res->action) {
case SHOW_INTERFACE:
done = show_interface_msg(&imsg);
break;
default:
break;
}
imsg_free(&imsg);
}
}
close(ctl_sock);
free(ibuf);
return (0);
}
int
show_interface_msg(struct imsg *imsg)
{
static int if_count = 0;
struct ctl_engine_info *cei;
struct timespec now, diff;
time_t y, d, h, m, s;
int i;
char buf[IF_NAMESIZE], *bufp;
char ipbuf[INET_ADDRSTRLEN];
char maskbuf[INET_ADDRSTRLEN];
char gwbuf[INET_ADDRSTRLEN];
switch (imsg->hdr.type) {
case IMSG_CTL_SHOW_INTERFACE_INFO:
cei = imsg->data;
if (if_count++ > 0)
printf("\n");
bufp = if_indextoname(cei->if_index, buf);
printf("%s [%s]:\n", bufp != NULL ? bufp : "unknown",
cei->state);
memset(ipbuf, 0, sizeof(ipbuf));
if (cei->server_identifier.s_addr != INADDR_ANY) {
if (inet_ntop(AF_INET, &cei->server_identifier, ipbuf,
sizeof(ipbuf)) == NULL)
ipbuf[0] = '\0';
} else if (cei->dhcp_server.s_addr != INADDR_ANY) {
if (inet_ntop(AF_INET, &cei->dhcp_server, ipbuf,
sizeof(ipbuf)) == NULL)
ipbuf[0] = '\0';
}
if (ipbuf[0] != '\0')
printf("\tserver: %s\n", ipbuf);
if (cei->requested_ip.s_addr != INADDR_ANY) {
clock_gettime(CLOCK_MONOTONIC, &now);
timespecsub(&now, &cei->request_time, &diff);
memset(ipbuf, 0, sizeof(ipbuf));
memset(maskbuf, 0, sizeof(maskbuf));
memset(gwbuf, 0, sizeof(gwbuf));
if (inet_ntop(AF_INET, &cei->requested_ip, ipbuf,
sizeof(ipbuf)) == NULL)
ipbuf[0] = '\0';
if (inet_ntop(AF_INET, &cei->mask, maskbuf,
sizeof(maskbuf)) == NULL)
maskbuf[0] = '\0';
printf("\t IP: %s/%s\n", ipbuf, maskbuf);
for (i = 0; i < cei->routes_len; i++) {
if (inet_ntop(AF_INET, &cei->routes[i].dst,
ipbuf, sizeof(ipbuf)) == NULL)
ipbuf[0] = '\0';
if (inet_ntop(AF_INET, &cei->routes[i].mask,
maskbuf, sizeof(maskbuf)) == NULL)
maskbuf[0] = '\0';
if (inet_ntop(AF_INET, &cei->routes[i].gw,
gwbuf, sizeof(gwbuf)) == NULL)
gwbuf[0] = '\0';
printf("\t%s\t%s/%s - %s\n", i == 0 ? "routes:"
: "", ipbuf, maskbuf, gwbuf);
}
if (cei->nameservers[0].s_addr != INADDR_ANY) {
printf("\t DNS:");
for (i = 0; i < MAX_RDNS_COUNT &&
cei->nameservers[i].s_addr != INADDR_ANY;
i++) {
if (inet_ntop(AF_INET,
&cei->nameservers[i], ipbuf,
sizeof(ipbuf)) == NULL)
continue;
printf(" %s", ipbuf);
}
printf("\n");
}
s = cei->lease_time - diff.tv_sec;
if (s < 0)
s = 0;
y = s / 31556926; s -= y * 31556926;
d = s / 86400; s -= d * 86400;
h = s / 3600; s -= h * 3600;
m = s / 60; s -= m * 60;
printf("\t lease: ");
if (y > 0)
printf("%lldy ", y);
if (d > 0)
printf("%lldd ", d);
if (h > 0)
printf("%lldh ", h);
if (m > 0)
printf("%lldm ", m);
if (s > 0)
printf("%llds ", s);
printf("\n");
}
break;
case IMSG_CTL_END:
return (1);
default:
break;
}
return (0);
}
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