86a93955c2e1386acb7bb9be005e1b09c0c7ba1c
2 * Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
23 #include <arpa/inet.h>
24 #include <netinet/in.h>
28 static const char hexdigits
[] = "0123456789abcdef";
29 static const int8_t hexvals
[] = {
30 -1, -1, -1, -1, -1, -1, -1, -1, -1, -2, -2, -1, -1, -2, -1, -1,
31 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
32 -2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
33 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
34 -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
35 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
36 -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
37 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
42 static char *argv
[4] = {NULL
, NULL
, NULL
, NULL
};
43 static volatile char *delayed_call
= NULL
;
44 static bool dont_delay
= false;
47 int script_init(const char *path
, const char *ifname
)
49 argv
[0] = (char*)path
;
50 argv
[1] = (char*)ifname
;
55 ssize_t
script_unhexlify(uint8_t *dst
, size_t len
, const char *src
)
58 for (c
= 0; c
< len
&& src
[0] && src
[1]; ++c
) {
59 int8_t x
= (int8_t)*src
++;
60 int8_t y
= (int8_t)*src
++;
61 if (x
< 0 || (x
= hexvals
[x
]) < 0
62 || y
< 0 || (y
= hexvals
[y
]) < 0)
65 while (((int8_t)*src
) < 0 ||
66 (*src
&& hexvals
[(uint8_t)*src
] < 0))
74 static void script_hexlify(char *dst
, const uint8_t *src
, size_t len
) {
75 for (size_t i
= 0; i
< len
; ++i
) {
76 *dst
++ = hexdigits
[src
[i
] >> 4];
77 *dst
++ = hexdigits
[src
[i
] & 0x0f];
83 static void ipv6_to_env(const char *name
,
84 const struct in6_addr
*addr
, size_t cnt
)
86 size_t buf_len
= strlen(name
);
87 char *buf
= realloc(NULL
, cnt
* INET6_ADDRSTRLEN
+ buf_len
+ 2);
88 memcpy(buf
, name
, buf_len
);
90 for (size_t i
= 0; i
< cnt
; ++i
) {
91 inet_ntop(AF_INET6
, &addr
[i
], &buf
[buf_len
], INET6_ADDRSTRLEN
);
92 buf_len
+= strlen(&buf
[buf_len
]);
95 buf
[buf_len
- 1] = '\0';
100 static void fqdn_to_env(const char *name
, const uint8_t *fqdn
, size_t len
)
102 size_t buf_len
= strlen(name
);
103 size_t buf_size
= len
+ buf_len
+ 2;
104 const uint8_t *fqdn_end
= fqdn
+ len
;
105 char *buf
= realloc(NULL
, len
+ buf_len
+ 2);
106 memcpy(buf
, name
, buf_len
);
107 buf
[buf_len
++] = '=';
109 while (l
> 0 && fqdn
< fqdn_end
) {
110 l
= dn_expand(fqdn
, fqdn_end
, fqdn
, &buf
[buf_len
], buf_size
- buf_len
);
112 buf_len
+= strlen(&buf
[buf_len
]);
113 buf
[buf_len
++] = ' ';
115 buf
[buf_len
- 1] = '\0';
120 static void fqdn_to_ip_env(const char *name
, const uint8_t *fqdn
, size_t len
)
122 size_t buf_len
= strlen(name
);
123 char *buf
= realloc(NULL
, INET6_ADDRSTRLEN
+ buf_len
+ 3);
124 memcpy(buf
, name
, buf_len
);
125 buf
[buf_len
++] = '=';
128 if (dn_expand(fqdn
, fqdn
+ len
, fqdn
, namebuf
, sizeof(namebuf
)) <= 0)
131 struct addrinfo hints
= {.ai_family
= AF_INET6
}, *r
;
132 if (getaddrinfo(namebuf
, NULL
, &hints
, &r
))
135 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)r
->ai_addr
;
136 inet_ntop(AF_INET6
, &sin6
->sin6_addr
, &buf
[buf_len
], INET6_ADDRSTRLEN
);
143 static void bin_to_env(uint8_t *opts
, size_t len
)
145 uint8_t *oend
= opts
+ len
, *odata
;
146 uint16_t otype
, olen
;
147 dhcpv6_for_each_option(opts
, oend
, otype
, olen
, odata
) {
148 char *buf
= realloc(NULL
, 14 + (olen
* 2));
151 snprintf(buf
, 14, "OPTION_%hu=", otype
);
152 buf_len
+= strlen(buf
);
154 script_hexlify(&buf
[buf_len
], odata
, olen
);
166 static void entry_to_env(const char *name
, const void *data
, size_t len
, enum entry_type type
)
168 size_t buf_len
= strlen(name
);
169 const struct odhcp6c_entry
*e
= data
;
170 char *buf
= realloc(NULL
, buf_len
+ 2 + (len
/ sizeof(*e
)) * 144);
171 memcpy(buf
, name
, buf_len
);
172 buf
[buf_len
++] = '=';
174 for (size_t i
= 0; i
< len
/ sizeof(*e
); ++i
) {
175 inet_ntop(AF_INET6
, &e
[i
].target
, &buf
[buf_len
], INET6_ADDRSTRLEN
);
176 buf_len
+= strlen(&buf
[buf_len
]);
177 if (type
!= ENTRY_HOST
) {
178 buf_len
+= snprintf(&buf
[buf_len
], 6, "/%hhu", e
[i
].length
);
179 if (type
== ENTRY_ROUTE
) {
180 buf
[buf_len
++] = ',';
181 if (!IN6_IS_ADDR_UNSPECIFIED(&e
[i
].router
)) {
182 inet_ntop(AF_INET6
, &e
[i
].router
, &buf
[buf_len
], INET6_ADDRSTRLEN
);
183 buf_len
+= strlen(&buf
[buf_len
]);
185 buf_len
+= snprintf(&buf
[buf_len
], 24, ",%u", e
[i
].valid
);
186 buf_len
+= snprintf(&buf
[buf_len
], 12, ",%u", e
[i
].priority
);
188 buf_len
+= snprintf(&buf
[buf_len
], 24, ",%u,%u", e
[i
].preferred
, e
[i
].valid
);
191 if ((type
== ENTRY_PREFIX
|| type
== ENTRY_ADDRESS
) && e
[i
].class)
192 buf_len
+= snprintf(&buf
[buf_len
], 12, ",class=%u", e
[i
].class);
193 else if (type
== ENTRY_PREFIX
)
194 buf_len
+= snprintf(&buf
[buf_len
], 16, ",class=%08x", ntohl(e
[i
].iaid
));
196 if (type
== ENTRY_PREFIX
&& e
[i
].priority
) {
197 // priority and router are abused for prefix exclusion
198 buf_len
+= snprintf(&buf
[buf_len
], 12, ",excluded=");
199 inet_ntop(AF_INET6
, &e
[i
].router
, &buf
[buf_len
], INET6_ADDRSTRLEN
);
200 buf_len
+= strlen(&buf
[buf_len
]);
201 buf_len
+= snprintf(&buf
[buf_len
], 24, "/%u", e
[i
].priority
);
204 buf
[buf_len
++] = ' ';
207 buf
[buf_len
- 1] = '\0';
212 static void script_call_delayed(int signal
__attribute__((unused
)))
215 script_call((char*)delayed_call
);
219 void script_delay_call(const char *status
, int timeout
)
223 } else if (!delayed_call
) {
224 delayed_call
= strdup(status
);
225 signal(SIGALRM
, script_call_delayed
);
231 void script_call(const char *status
)
233 size_t dns_len
, search_len
, custom_len
, sntp_ip_len
, ntp_ip_len
, ntp_dns_len
;
234 size_t sip_ip_len
, sip_fqdn_len
, aftr_name_len
;
242 struct in6_addr
*dns
= odhcp6c_get_state(STATE_DNS
, &dns_len
);
243 uint8_t *search
= odhcp6c_get_state(STATE_SEARCH
, &search_len
);
244 uint8_t *custom
= odhcp6c_get_state(STATE_CUSTOM_OPTS
, &custom_len
);
245 struct in6_addr
*sntp
= odhcp6c_get_state(STATE_SNTP_IP
, &sntp_ip_len
);
246 struct in6_addr
*ntp
= odhcp6c_get_state(STATE_NTP_IP
, &ntp_ip_len
);
247 uint8_t *ntp_dns
= odhcp6c_get_state(STATE_NTP_FQDN
, &ntp_dns_len
);
248 struct in6_addr
*sip
= odhcp6c_get_state(STATE_SIP_IP
, &sip_ip_len
);
249 uint8_t *sip_fqdn
= odhcp6c_get_state(STATE_SIP_FQDN
, &sip_fqdn_len
);
250 uint8_t *aftr_name
= odhcp6c_get_state(STATE_AFTR_NAME
, &aftr_name_len
);
252 size_t prefix_len
, address_len
, ra_pref_len
, ra_route_len
, ra_dns_len
;
253 uint8_t *prefix
= odhcp6c_get_state(STATE_IA_PD
, &prefix_len
);
254 uint8_t *address
= odhcp6c_get_state(STATE_IA_NA
, &address_len
);
255 uint8_t *ra_pref
= odhcp6c_get_state(STATE_RA_PREFIX
, &ra_pref_len
);
256 uint8_t *ra_route
= odhcp6c_get_state(STATE_RA_ROUTE
, &ra_route_len
);
257 uint8_t *ra_dns
= odhcp6c_get_state(STATE_RA_DNS
, &ra_dns_len
);
259 // Don't set environment before forking, because env is leaky.
261 ipv6_to_env("RDNSS", dns
, dns_len
/ sizeof(*dns
));
262 ipv6_to_env("SNTP_IP", sntp
, sntp_ip_len
/ sizeof(*sntp
));
263 ipv6_to_env("NTP_IP", ntp
, ntp_ip_len
/ sizeof(*ntp
));
264 fqdn_to_env("NTP_FQDN", ntp_dns
, ntp_dns_len
);
265 ipv6_to_env("SIP_IP", sip
, sip_ip_len
/ sizeof(*sip
));
266 fqdn_to_env("DOMAINS", search
, search_len
);
267 fqdn_to_env("SIP_DOMAIN", sip_fqdn
, sip_fqdn_len
);
268 fqdn_to_env("AFTR", aftr_name
, aftr_name_len
);
269 fqdn_to_ip_env("AFTR_IP", aftr_name
, aftr_name_len
);
270 bin_to_env(custom
, custom_len
);
271 entry_to_env("PREFIXES", prefix
, prefix_len
, ENTRY_PREFIX
);
272 entry_to_env("ADDRESSES", address
, address_len
, ENTRY_ADDRESS
);
273 entry_to_env("RA_ADDRESSES", ra_pref
, ra_pref_len
, ENTRY_ADDRESS
);
274 entry_to_env("RA_ROUTES", ra_route
, ra_route_len
, ENTRY_ROUTE
);
275 entry_to_env("RA_DNS", ra_dns
, ra_dns_len
, ENTRY_HOST
);
277 argv
[2] = (char*)status
;
278 execv(argv
[0], argv
);
282 // Delete lost prefixes and user opts
283 odhcp6c_clear_state(STATE_CUSTOM_OPTS
);