| 192 |
|
return *mask ? (*mask == *name && match_esc(mask + 1, name + 1)) : !*name; |
| 193 |
|
} |
| 194 |
|
|
| 195 |
– |
static inline int |
| 196 |
– |
comp_with_mask(void *addr, void *dest, unsigned int mask) |
| 197 |
– |
{ |
| 198 |
– |
if (memcmp(addr, dest, mask / 8) == 0) |
| 199 |
– |
{ |
| 200 |
– |
int n = mask / 8; |
| 201 |
– |
int m = ((-1) << (8 - (mask % 8))); |
| 202 |
– |
|
| 203 |
– |
if (mask % 8 == 0 || |
| 204 |
– |
(((unsigned char *) addr)[n] & m) == (((unsigned char *) dest)[n] & m)) |
| 205 |
– |
return 1; |
| 206 |
– |
} |
| 207 |
– |
|
| 208 |
– |
return 0; |
| 209 |
– |
} |
| 210 |
– |
|
| 211 |
– |
/* match_cidr() |
| 212 |
– |
* |
| 213 |
– |
* Input - mask, address |
| 214 |
– |
* Output - 1 = Matched 0 = Did not match |
| 215 |
– |
*/ |
| 216 |
– |
int |
| 217 |
– |
match_cidr(const char *s1, const char *s2) |
| 218 |
– |
{ |
| 219 |
– |
struct irc_ssaddr ipaddr, maskaddr; |
| 220 |
– |
char address[NICKLEN + USERLEN + HOSTLEN + 6]; |
| 221 |
– |
char mask[NICKLEN + USERLEN + HOSTLEN + 6]; |
| 222 |
– |
char *ipmask, *ip, *len; |
| 223 |
– |
int cidrlen, offset; |
| 224 |
– |
struct addrinfo hints, *res; |
| 225 |
– |
|
| 226 |
– |
/* Unlikely to ever overflow, but we may as well be consistant - stu */ |
| 227 |
– |
strlcpy(mask, s1, sizeof(mask)); |
| 228 |
– |
strlcpy(address, s2, sizeof(address)); |
| 229 |
– |
|
| 230 |
– |
ipmask = strrchr(mask, '@'); |
| 231 |
– |
if (ipmask == NULL) |
| 232 |
– |
return 0; |
| 233 |
– |
|
| 234 |
– |
*ipmask++ = '\0'; |
| 235 |
– |
|
| 236 |
– |
ip = strrchr(address, '@'); |
| 237 |
– |
if (ip == NULL) |
| 238 |
– |
return 0; |
| 239 |
– |
*ip++ = '\0'; |
| 240 |
– |
|
| 241 |
– |
len = strrchr(ipmask, '/'); |
| 242 |
– |
if (len == NULL) |
| 243 |
– |
return 0; |
| 244 |
– |
|
| 245 |
– |
*len++ = '\0'; |
| 246 |
– |
|
| 247 |
– |
cidrlen = atoi(len); |
| 248 |
– |
if (cidrlen == 0) |
| 249 |
– |
return 0; |
| 250 |
– |
|
| 251 |
– |
memset(&hints, 0, sizeof(hints)); |
| 252 |
– |
hints.ai_family = AF_UNSPEC; |
| 253 |
– |
hints.ai_flags = AI_NUMERICHOST; |
| 254 |
– |
|
| 255 |
– |
irc_getaddrinfo(ip, NULL, &hints, &res); |
| 256 |
– |
if (!res) |
| 257 |
– |
return 0; |
| 258 |
– |
|
| 259 |
– |
#ifdef INET6 |
| 260 |
– |
if (res->ai_family == AF_INET) |
| 261 |
– |
offset = offsetof(struct sockaddr_in, sin_addr); |
| 262 |
– |
else if (res->ai_family == AF_INET6) |
| 263 |
– |
offset = offsetof(struct sockaddr_in6, sin6_addr); |
| 264 |
– |
else |
| 265 |
– |
return 0; |
| 266 |
– |
#else |
| 267 |
– |
offset = offsetof(struct sockaddr_in, sin_addr); |
| 268 |
– |
#endif |
| 269 |
– |
|
| 270 |
– |
memcpy(&ipaddr, res->ai_addr, res->ai_addrlen); |
| 271 |
– |
ipaddr.ss_len = res->ai_addrlen; |
| 272 |
– |
irc_freeaddrinfo(res); |
| 273 |
– |
|
| 274 |
– |
if (cidrlen > ipaddr.ss_len * 8) |
| 275 |
– |
return 0; |
| 276 |
– |
|
| 277 |
– |
irc_getaddrinfo(ipmask, NULL, &hints, &res); |
| 278 |
– |
if (!res) |
| 279 |
– |
return 0; |
| 280 |
– |
|
| 281 |
– |
memcpy(&maskaddr, res->ai_addr, res->ai_addrlen); |
| 282 |
– |
maskaddr.ss_len = res->ai_addrlen; |
| 283 |
– |
irc_freeaddrinfo(res); |
| 284 |
– |
|
| 285 |
– |
if (maskaddr.ss_len != ipaddr.ss_len) |
| 286 |
– |
return 0; |
| 287 |
– |
|
| 288 |
– |
return (comp_with_mask(((char *) &ipaddr) + offset, ((char *) &maskaddr) + |
| 289 |
– |
offset, cidrlen) && match(mask, address)); |
| 290 |
– |
} |
| 291 |
– |
|
| 195 |
|
/* collapse() |
| 196 |
|
* |
| 197 |
|
* collapses a string containing multiple *'s. |
