1/*	$OpenBSD: printconf.c,v 1.6 2023/11/25 13:00:05 florian Exp $	*/
2
3/*
4 * Copyright (c) 2018 Florian Obser <florian@openbsd.org>
5 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#include <sys/types.h>
21#include <sys/queue.h>
22#include <sys/socket.h>
23#include <sys/uio.h>
24
25#include <net/if.h>
26
27#include <netinet/in.h>
28#include <netinet/if_ether.h>
29
30#include <arpa/inet.h>
31
32#include <event.h>
33#include <imsg.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <vis.h>
37
38#include "dhcpleased.h"
39#include "log.h"
40
41void	print_dhcp_options(char *, uint8_t *, int);
42
43void
44print_dhcp_options(char *indent, uint8_t *p, int len)
45{
46	static char	 buf[4 * 1500 + 1];
47	int		 rem, i;
48	uint8_t		 dho, dho_len;
49
50	rem = len;
51
52	while (rem > 0) {
53		dho = *p;
54		p += 1;
55		rem -= 1;
56
57		if (rem == 0)
58			fatal("dhcp option too short");
59		dho_len = *p;
60		p += 1;
61		rem -= 1;
62		if (rem < dho_len)
63			fatal("dhcp option too short: %d %d", rem, dho_len);
64
65		switch (dho) {
66		case DHO_DHCP_CLASS_IDENTIFIER:
67			strvisx(buf, p, dho_len, VIS_DQ | VIS_CSTYLE);
68			p += dho_len;
69			rem -= dho_len;
70			printf("%ssend vendor class id \"%s\"\n", indent, buf);
71			break;
72		case DHO_DHCP_CLIENT_IDENTIFIER:
73			if (dho_len < 1)
74				fatal("dhcp option too short");
75			switch (*p) {
76			case HTYPE_ETHER:
77				printf("%ssend client id \"", indent);
78				for (i = 0; i < dho_len; i++)
79					printf("%s%02x", i != 0? ":" : "",
80					    *(p + i));
81				printf("\"\n");
82				break;
83			default:
84				strvisx(buf, p, dho_len, VIS_DQ | VIS_CSTYLE);
85				printf("%ssend client id \"%s\"\n",
86				    indent, buf);
87				break;
88			}
89			p += dho_len;
90			rem -= dho_len;
91			break;
92		default:
93			fatal("unknown dhcp option: %d [%d]", *p, rem);
94			break;
95		}
96	}
97}
98
99void
100print_config(struct dhcpleased_conf *conf)
101{
102	struct iface_conf	*iface;
103	int			 i;
104	char			 hbuf[INET_ADDRSTRLEN];
105
106	SIMPLEQ_FOREACH(iface, &conf->iface_list, entry) {
107		printf("interface %s {\n", iface->name);
108		print_dhcp_options("\t", iface->c_id, iface->c_id_len);
109		if (iface->h_name != NULL) {
110			if (iface->h_name[0] == '\0')
111				printf("\tsend no host name\n");
112			else {
113				printf("\tsend host name \"%s\"\n",
114				    iface->h_name);
115			}
116		}
117		print_dhcp_options("\t", iface->vc_id, iface->vc_id_len);
118		if (iface->ignore & IGN_DNS)
119			printf("\tignore dns\n");
120		if (iface->ignore & IGN_ROUTES)
121			printf("\tignore routes\n");
122		for (i = 0; i < iface->ignore_servers_len; i++) {
123			if (inet_ntop(AF_INET, &iface->ignore_servers[i],
124			    hbuf, sizeof(hbuf)) == NULL)
125				continue;
126			printf("\tignore %s\n", hbuf);
127
128		}
129		if (iface->prefer_ipv6)
130			printf("\tprefer ipv6\n");
131		printf("}\n");
132	}
133}
134