diff options
Diffstat (limited to 'src/gns/nss/nss_gns.c')
-rw-r--r-- | src/gns/nss/nss_gns.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/src/gns/nss/nss_gns.c b/src/gns/nss/nss_gns.c deleted file mode 100644 index 77b4340ee..000000000 --- a/src/gns/nss/nss_gns.c +++ /dev/null | |||
@@ -1,252 +0,0 @@ | |||
1 | /*** | ||
2 | This file is part of nss-gns. | ||
3 | |||
4 | Parts taken from: nss.c in nss-mdns | ||
5 | |||
6 | nss-mdns is free software; you can redistribute it and/or modify | ||
7 | it under the terms of the GNU General Public License as published | ||
8 | by the Free Software Foundation; either version 3 of the License, | ||
9 | or (at your option) any later version. | ||
10 | |||
11 | nss-mdns is distributed in the hope that it will be useful, but1 | ||
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
14 | General Public License for more details. | ||
15 | |||
16 | You should have received a copy of the GNU Lesser General Public License | ||
17 | along with nss-mdns; if not, write to the Free Software | ||
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 | ||
19 | USA. | ||
20 | ***/ | ||
21 | |||
22 | #include <gnunet_config.h> | ||
23 | #include <unistd.h> | ||
24 | #include <errno.h> | ||
25 | #include <string.h> | ||
26 | #include <assert.h> | ||
27 | #include <netdb.h> | ||
28 | #include <sys/socket.h> | ||
29 | #include <nss.h> | ||
30 | #include <stdio.h> | ||
31 | #include <stdlib.h> | ||
32 | #include <errno.h> | ||
33 | |||
34 | #include "nss_gns_query.h" | ||
35 | |||
36 | #include <arpa/inet.h> | ||
37 | |||
38 | /** macro to align idx to 32bit boundary */ | ||
39 | #define ALIGN(idx) do { \ | ||
40 | if (idx % sizeof(void*)) \ | ||
41 | idx += (sizeof(void*) - idx % sizeof(void*)); /* Align on 32 bit boundary */ \ | ||
42 | } while (0) | ||
43 | |||
44 | |||
45 | /** | ||
46 | * The gethostbyname hook executed by nsswitch | ||
47 | * | ||
48 | * @param name the name to resolve | ||
49 | * @param af the address family to resolve | ||
50 | * @param result the result hostent | ||
51 | * @param buffer the result buffer | ||
52 | * @param buflen length of the buffer | ||
53 | * @param errnop idk | ||
54 | * @param h_errnop idk | ||
55 | * @return a nss_status code | ||
56 | */ | ||
57 | enum nss_status | ||
58 | _nss_gns_gethostbyname2_r (const char *name, | ||
59 | int af, | ||
60 | struct hostent *result, | ||
61 | char *buffer, | ||
62 | size_t buflen, | ||
63 | int *errnop, | ||
64 | int *h_errnop) | ||
65 | { | ||
66 | struct userdata u; | ||
67 | enum nss_status status = NSS_STATUS_UNAVAIL; | ||
68 | int i; | ||
69 | size_t address_length; | ||
70 | size_t l; | ||
71 | size_t idx; | ||
72 | size_t astart; | ||
73 | |||
74 | if (af == AF_UNSPEC) | ||
75 | #ifdef NSS_IPV6_ONLY | ||
76 | af = AF_INET6; | ||
77 | #else | ||
78 | af = AF_INET; | ||
79 | #endif | ||
80 | |||
81 | #ifdef NSS_IPV4_ONLY | ||
82 | if (af != AF_INET) | ||
83 | #elif NSS_IPV6_ONLY | ||
84 | if (af != AF_INET6) | ||
85 | #else | ||
86 | if ((af != AF_INET) && | ||
87 | (af != AF_INET6)) | ||
88 | #endif | ||
89 | { | ||
90 | *errnop = EINVAL; | ||
91 | *h_errnop = NO_RECOVERY; | ||
92 | |||
93 | goto finish; | ||
94 | } | ||
95 | |||
96 | address_length = (af == AF_INET) ? sizeof(ipv4_address_t) : | ||
97 | sizeof(ipv6_address_t); | ||
98 | if (buflen < | ||
99 | sizeof(char*) /* alias names */ | ||
100 | + strlen (name) + 1) | ||
101 | { /* official name */ | ||
102 | *errnop = ERANGE; | ||
103 | *h_errnop = NO_RECOVERY; | ||
104 | status = NSS_STATUS_TRYAGAIN; | ||
105 | |||
106 | goto finish; | ||
107 | } | ||
108 | u.count = 0; | ||
109 | u.data_len = 0; | ||
110 | i = gns_resolve_name (af, | ||
111 | name, | ||
112 | &u); | ||
113 | if (-1 == i) | ||
114 | { | ||
115 | *errnop = errno; | ||
116 | status = NSS_STATUS_UNAVAIL; | ||
117 | *h_errnop = NO_RECOVERY; | ||
118 | goto finish; | ||
119 | } | ||
120 | if (-2 == i) | ||
121 | { | ||
122 | *errnop = ENOENT; | ||
123 | *h_errnop = NO_RECOVERY; | ||
124 | status = NSS_STATUS_UNAVAIL; | ||
125 | goto finish; | ||
126 | } | ||
127 | if (-3 == i) | ||
128 | { | ||
129 | *errnop = ETIMEDOUT; | ||
130 | *h_errnop = HOST_NOT_FOUND; | ||
131 | status = NSS_STATUS_NOTFOUND; | ||
132 | goto finish; | ||
133 | } | ||
134 | if (0 == u.count) | ||
135 | { | ||
136 | *errnop = 0; /* success */ | ||
137 | *h_errnop = NO_DATA; /* success */ | ||
138 | status = NSS_STATUS_NOTFOUND; | ||
139 | goto finish; | ||
140 | } | ||
141 | /* Alias names */ | ||
142 | *((char **) buffer) = NULL; | ||
143 | result->h_aliases = (char **) buffer; | ||
144 | idx = sizeof(char*); | ||
145 | |||
146 | /* Official name */ | ||
147 | strcpy (buffer + idx, | ||
148 | name); | ||
149 | result->h_name = buffer + idx; | ||
150 | idx += strlen (name) + 1; | ||
151 | |||
152 | ALIGN (idx); | ||
153 | |||
154 | result->h_addrtype = af; | ||
155 | result->h_length = address_length; | ||
156 | |||
157 | /* Check if there's enough space for the addresses */ | ||
158 | if (buflen < idx + u.data_len + sizeof(char*) * (u.count + 1)) | ||
159 | { | ||
160 | *errnop = ERANGE; | ||
161 | *h_errnop = NO_RECOVERY; | ||
162 | status = NSS_STATUS_TRYAGAIN; | ||
163 | goto finish; | ||
164 | } | ||
165 | /* Addresses */ | ||
166 | astart = idx; | ||
167 | l = u.count * address_length; | ||
168 | if (0 != l) | ||
169 | memcpy (buffer + astart, | ||
170 | &u.data, | ||
171 | l); | ||
172 | /* address_length is a multiple of 32bits, so idx is still aligned | ||
173 | * correctly */ | ||
174 | idx += l; | ||
175 | |||
176 | /* Address array address_length is always a multiple of 32bits */ | ||
177 | for (i = 0; i < u.count; i++) | ||
178 | ((char **) (buffer + idx))[i] = buffer + astart + address_length * i; | ||
179 | ((char **) (buffer + idx))[i] = NULL; | ||
180 | result->h_addr_list = (char **) (buffer + idx); | ||
181 | |||
182 | status = NSS_STATUS_SUCCESS; | ||
183 | |||
184 | finish: | ||
185 | return status; | ||
186 | } | ||
187 | |||
188 | |||
189 | /** | ||
190 | * The gethostbyname hook executed by nsswitch | ||
191 | * | ||
192 | * @param name the name to resolve | ||
193 | * @param result the result hostent | ||
194 | * @param buffer the result buffer | ||
195 | * @param buflen length of the buffer | ||
196 | * @param errnop[out] the low-level error code to return to the application | ||
197 | * @param h_errnop idk | ||
198 | * @return a nss_status code | ||
199 | */ | ||
200 | enum nss_status | ||
201 | _nss_gns_gethostbyname_r (const char *name, | ||
202 | struct hostent *result, | ||
203 | char *buffer, | ||
204 | size_t buflen, | ||
205 | int *errnop, | ||
206 | int *h_errnop) | ||
207 | { | ||
208 | return _nss_gns_gethostbyname2_r (name, | ||
209 | AF_UNSPEC, | ||
210 | result, | ||
211 | buffer, | ||
212 | buflen, | ||
213 | errnop, | ||
214 | h_errnop); | ||
215 | } | ||
216 | |||
217 | |||
218 | /** | ||
219 | * The gethostbyaddr hook executed by nsswitch | ||
220 | * We can't do this so we always return NSS_STATUS_UNAVAIL | ||
221 | * | ||
222 | * @param addr the address to resolve | ||
223 | * @param len the length of the address | ||
224 | * @param af the address family of the address | ||
225 | * @param result the result hostent | ||
226 | * @param buffer the result buffer | ||
227 | * @param buflen length of the buffer | ||
228 | * @param errnop[out] the low-level error code to return to the application | ||
229 | * @param h_errnop idk | ||
230 | * @return NSS_STATUS_UNAVAIL | ||
231 | */ | ||
232 | enum nss_status | ||
233 | _nss_gns_gethostbyaddr_r (const void*addr, | ||
234 | int len, | ||
235 | int af, | ||
236 | struct hostent *result, | ||
237 | char *buffer, | ||
238 | size_t buflen, | ||
239 | int *errnop, | ||
240 | int *h_errnop) | ||
241 | { | ||
242 | (void) addr; | ||
243 | (void) len; | ||
244 | (void) af; | ||
245 | (void) result; | ||
246 | (void) buffer; | ||
247 | (void) buflen; | ||
248 | *errnop = EINVAL; | ||
249 | *h_errnop = NO_RECOVERY; | ||
250 | /* NOTE we allow to leak this into DNS so no NOTFOUND */ | ||
251 | return NSS_STATUS_UNAVAIL; | ||
252 | } | ||