Contents of /trunk/mkinitrd-magellan/busybox/networking/libiproute/utils.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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File size: 5699 byte(s)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 5699 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * utils.c |
4 | * |
5 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
6 | * |
7 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
8 | * |
9 | * Changes: |
10 | * |
11 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses |
12 | */ |
13 | |
14 | #include "libbb.h" |
15 | #include "utils.h" |
16 | #include "inet_common.h" |
17 | |
18 | unsigned get_unsigned(char *arg, const char *errmsg) |
19 | { |
20 | unsigned long res; |
21 | char *ptr; |
22 | |
23 | if (*arg) { |
24 | res = strtoul(arg, &ptr, 0); |
25 | //FIXME: "" will be accepted too, is it correct?! |
26 | if (!*ptr && res <= UINT_MAX) { |
27 | return res; |
28 | } |
29 | } |
30 | invarg(arg, errmsg); /* does not return */ |
31 | } |
32 | |
33 | uint32_t get_u32(char *arg, const char *errmsg) |
34 | { |
35 | unsigned long res; |
36 | char *ptr; |
37 | |
38 | if (*arg) { |
39 | res = strtoul(arg, &ptr, 0); |
40 | //FIXME: "" will be accepted too, is it correct?! |
41 | if (!*ptr && res <= 0xFFFFFFFFUL) { |
42 | return res; |
43 | } |
44 | } |
45 | invarg(arg, errmsg); /* does not return */ |
46 | } |
47 | |
48 | uint16_t get_u16(char *arg, const char *errmsg) |
49 | { |
50 | unsigned long res; |
51 | char *ptr; |
52 | |
53 | if (*arg) { |
54 | res = strtoul(arg, &ptr, 0); |
55 | //FIXME: "" will be accepted too, is it correct?! |
56 | if (!*ptr && res <= 0xFFFF) { |
57 | return res; |
58 | } |
59 | } |
60 | invarg(arg, errmsg); /* does not return */ |
61 | } |
62 | |
63 | int get_addr_1(inet_prefix *addr, char *name, int family) |
64 | { |
65 | memset(addr, 0, sizeof(*addr)); |
66 | |
67 | if (strcmp(name, bb_str_default) == 0 |
68 | || strcmp(name, "all") == 0 |
69 | || strcmp(name, "any") == 0 |
70 | ) { |
71 | addr->family = family; |
72 | addr->bytelen = (family == AF_INET6 ? 16 : 4); |
73 | addr->bitlen = -1; |
74 | return 0; |
75 | } |
76 | |
77 | if (strchr(name, ':')) { |
78 | addr->family = AF_INET6; |
79 | if (family != AF_UNSPEC && family != AF_INET6) |
80 | return -1; |
81 | if (inet_pton(AF_INET6, name, addr->data) <= 0) |
82 | return -1; |
83 | addr->bytelen = 16; |
84 | addr->bitlen = -1; |
85 | return 0; |
86 | } |
87 | |
88 | addr->family = AF_INET; |
89 | if (family != AF_UNSPEC && family != AF_INET) |
90 | return -1; |
91 | if (inet_pton(AF_INET, name, addr->data) <= 0) |
92 | return -1; |
93 | addr->bytelen = 4; |
94 | addr->bitlen = -1; |
95 | return 0; |
96 | } |
97 | |
98 | static int get_prefix_1(inet_prefix *dst, char *arg, int family) |
99 | { |
100 | int err; |
101 | unsigned plen; |
102 | char *slash; |
103 | |
104 | memset(dst, 0, sizeof(*dst)); |
105 | |
106 | if (strcmp(arg, bb_str_default) == 0 |
107 | || strcmp(arg, "all") == 0 |
108 | || strcmp(arg, "any") == 0 |
109 | ) { |
110 | dst->family = family; |
111 | /*dst->bytelen = 0; - done by memset */ |
112 | /*dst->bitlen = 0;*/ |
113 | return 0; |
114 | } |
115 | |
116 | slash = strchr(arg, '/'); |
117 | if (slash) |
118 | *slash = '\0'; |
119 | err = get_addr_1(dst, arg, family); |
120 | if (err == 0) { |
121 | dst->bitlen = (dst->family == AF_INET6) ? 128 : 32; |
122 | if (slash) { |
123 | inet_prefix netmask_pfx; |
124 | |
125 | netmask_pfx.family = AF_UNSPEC; |
126 | plen = bb_strtou(slash + 1, NULL, 0); |
127 | if ((errno || plen > dst->bitlen) |
128 | && (get_addr_1(&netmask_pfx, slash + 1, family))) |
129 | err = -1; |
130 | else if (netmask_pfx.family == AF_INET) { |
131 | /* fill in prefix length of dotted quad */ |
132 | uint32_t mask = ntohl(netmask_pfx.data[0]); |
133 | uint32_t host = ~mask; |
134 | |
135 | /* a valid netmask must be 2^n - 1 */ |
136 | if (!(host & (host + 1))) { |
137 | for (plen = 0; mask; mask <<= 1) |
138 | ++plen; |
139 | if (plen <= dst->bitlen) { |
140 | dst->bitlen = plen; |
141 | /* dst->flags |= PREFIXLEN_SPECIFIED; */ |
142 | } else |
143 | err = -1; |
144 | } else |
145 | err = -1; |
146 | } else { |
147 | /* plain prefix */ |
148 | dst->bitlen = plen; |
149 | } |
150 | } |
151 | } |
152 | if (slash) |
153 | *slash = '/'; |
154 | return err; |
155 | } |
156 | |
157 | int get_addr(inet_prefix *dst, char *arg, int family) |
158 | { |
159 | if (family == AF_PACKET) { |
160 | bb_error_msg_and_die("\"%s\" may be inet %s, but it is not allowed in this context", arg, "address"); |
161 | } |
162 | if (get_addr_1(dst, arg, family)) { |
163 | bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "inet", "address", arg); |
164 | } |
165 | return 0; |
166 | } |
167 | |
168 | int get_prefix(inet_prefix *dst, char *arg, int family) |
169 | { |
170 | if (family == AF_PACKET) { |
171 | bb_error_msg_and_die("\"%s\" may be inet %s, but it is not allowed in this context", arg, "prefix"); |
172 | } |
173 | if (get_prefix_1(dst, arg, family)) { |
174 | bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "inet", "prefix", arg); |
175 | } |
176 | return 0; |
177 | } |
178 | |
179 | uint32_t get_addr32(char *name) |
180 | { |
181 | inet_prefix addr; |
182 | |
183 | if (get_addr_1(&addr, name, AF_INET)) { |
184 | bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "IP", "address", name); |
185 | } |
186 | return addr.data[0]; |
187 | } |
188 | |
189 | void incomplete_command(void) |
190 | { |
191 | bb_error_msg_and_die("command line is not complete, try option \"help\""); |
192 | } |
193 | |
194 | void invarg(const char *arg, const char *opt) |
195 | { |
196 | bb_error_msg_and_die(bb_msg_invalid_arg, arg, opt); |
197 | } |
198 | |
199 | void duparg(const char *key, const char *arg) |
200 | { |
201 | bb_error_msg_and_die("duplicate \"%s\": \"%s\" is the second value", key, arg); |
202 | } |
203 | |
204 | void duparg2(const char *key, const char *arg) |
205 | { |
206 | bb_error_msg_and_die("either \"%s\" is duplicate, or \"%s\" is garbage", key, arg); |
207 | } |
208 | |
209 | int inet_addr_match(inet_prefix *a, inet_prefix *b, int bits) |
210 | { |
211 | uint32_t *a1 = a->data; |
212 | uint32_t *a2 = b->data; |
213 | int words = bits >> 5; |
214 | |
215 | bits &= 0x1f; |
216 | |
217 | if (words) |
218 | if (memcmp(a1, a2, words << 2)) |
219 | return -1; |
220 | |
221 | if (bits) { |
222 | uint32_t w1, w2; |
223 | uint32_t mask; |
224 | |
225 | w1 = a1[words]; |
226 | w2 = a2[words]; |
227 | |
228 | mask = htonl((0xffffffff) << (0x20 - bits)); |
229 | |
230 | if ((w1 ^ w2) & mask) |
231 | return 1; |
232 | } |
233 | |
234 | return 0; |
235 | } |
236 | |
237 | const char *rt_addr_n2a(int af, |
238 | void *addr, char *buf, int buflen) |
239 | { |
240 | switch (af) { |
241 | case AF_INET: |
242 | case AF_INET6: |
243 | return inet_ntop(af, addr, buf, buflen); |
244 | default: |
245 | return "???"; |
246 | } |
247 | } |
248 | |
249 | #ifdef RESOLVE_HOSTNAMES |
250 | const char *format_host(int af, int len, void *addr, char *buf, int buflen) |
251 | { |
252 | if (resolve_hosts) { |
253 | struct hostent *h_ent; |
254 | |
255 | if (len <= 0) { |
256 | switch (af) { |
257 | case AF_INET: |
258 | len = 4; |
259 | break; |
260 | case AF_INET6: |
261 | len = 16; |
262 | break; |
263 | default:; |
264 | } |
265 | } |
266 | if (len > 0) { |
267 | h_ent = gethostbyaddr(addr, len, af); |
268 | if (h_ent != NULL) { |
269 | safe_strncpy(buf, h_ent->h_name, buflen); |
270 | return buf; |
271 | } |
272 | } |
273 | } |
274 | return rt_addr_n2a(af, addr, buf, buflen); |
275 | } |
276 | #endif |