jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 1 | /* |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 2 | * IP address pool functions. |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 3 | * Copyright (C) 2003, 2004 Mondru AB. |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 4 | * Copyright (C) 2017 by Harald Welte <laforge@gnumonks.org> |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 5 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 6 | * The contents of this file may be used under the terms of the GNU |
| 7 | * General Public License Version 2, provided that the above copyright |
| 8 | * notice and this permission notice is included in all copies or |
| 9 | * substantial portions of the software. |
| 10 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 11 | */ |
| 12 | |
jjako | 06e9f12 | 2004-01-19 18:37:58 +0000 | [diff] [blame] | 13 | #include <sys/types.h> |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 14 | #include <netinet/in.h> /* in_addr */ |
| 15 | #include <stdlib.h> /* calloc */ |
| 16 | #include <stdio.h> /* sscanf */ |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 17 | #include <string.h> |
| 18 | #include <sys/socket.h> |
| 19 | #include <arpa/inet.h> |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 20 | #include <netdb.h> |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 21 | #include "syserr.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 22 | #include "ippool.h" |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 23 | #include "lookup.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 24 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 25 | int ippool_printaddr(struct ippool_t *this) |
| 26 | { |
| 27 | unsigned int n; |
| 28 | printf("ippool_printaddr\n"); |
| 29 | printf("Firstdyn %d\n", this->firstdyn - this->member); |
| 30 | printf("Lastdyn %d\n", this->lastdyn - this->member); |
| 31 | printf("Firststat %d\n", this->firststat - this->member); |
| 32 | printf("Laststat %d\n", this->laststat - this->member); |
| 33 | printf("Listsize %d\n", this->listsize); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 34 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 35 | for (n = 0; n < this->listsize; n++) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 36 | char s[256]; |
| 37 | in46a_ntop(&this->member[n].addr, s, sizeof(s)); |
| 38 | printf("Unit %d inuse %d prev %d next %d addr %s\n", |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 39 | n, |
| 40 | this->member[n].inuse, |
| 41 | this->member[n].prev - this->member, |
| 42 | this->member[n].next - this->member, |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 43 | s); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 44 | } |
| 45 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 46 | } |
| 47 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 48 | int ippool_hashadd(struct ippool_t *this, struct ippoolm_t *member) |
| 49 | { |
| 50 | uint32_t hash; |
| 51 | struct ippoolm_t *p; |
| 52 | struct ippoolm_t *p_prev = NULL; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 53 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 54 | /* Insert into hash table */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 55 | hash = ippool_hash(&member->addr) & this->hashmask; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 56 | for (p = this->hash[hash]; p; p = p->nexthash) |
| 57 | p_prev = p; |
| 58 | if (!p_prev) |
| 59 | this->hash[hash] = member; |
| 60 | else |
| 61 | p_prev->nexthash = member; |
| 62 | return 0; /* Always OK to insert */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 63 | } |
| 64 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 65 | int ippool_hashdel(struct ippool_t *this, struct ippoolm_t *member) |
| 66 | { |
| 67 | uint32_t hash; |
| 68 | struct ippoolm_t *p; |
| 69 | struct ippoolm_t *p_prev = NULL; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 70 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 71 | /* Find in hash table */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 72 | hash = ippool_hash(&member->addr) & this->hashmask; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 73 | for (p = this->hash[hash]; p; p = p->nexthash) { |
| 74 | if (p == member) { |
| 75 | break; |
| 76 | } |
| 77 | p_prev = p; |
| 78 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 79 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 80 | if (p != member) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 81 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 82 | "ippool_hashdel: Tried to delete member not in hash table"); |
| 83 | return -1; |
| 84 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 85 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 86 | if (!p_prev) |
| 87 | this->hash[hash] = p->nexthash; |
| 88 | else |
| 89 | p_prev->nexthash = p->nexthash; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 90 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 91 | return 0; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 92 | } |
| 93 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 94 | static unsigned long int ippool_hash4(struct in_addr *addr) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 95 | { |
| 96 | return lookup((unsigned char *)&addr->s_addr, sizeof(addr->s_addr), 0); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 97 | } |
| 98 | |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 99 | static unsigned long int ippool_hash6(struct in6_addr *addr, unsigned int len) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 100 | { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 101 | /* TODO: Review hash spread for IPv6 */ |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 102 | return lookup((unsigned char *)addr->s6_addr, len, 0); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 103 | } |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 104 | |
| 105 | unsigned long int ippool_hash(struct in46_addr *addr) |
| 106 | { |
| 107 | if (addr->len == 4) |
| 108 | return ippool_hash4(&addr->v4); |
| 109 | else |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 110 | return ippool_hash6(&addr->v6, addr->len); |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 111 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 112 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 113 | /* Get IP address and mask */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 114 | int ippool_aton(struct in46_addr *addr, size_t *prefixlen, const char *pool_in, int number) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 115 | { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 116 | struct addrinfo *ai; |
| 117 | struct addrinfo hints = { |
| 118 | .ai_family = AF_UNSPEC, |
| 119 | .ai_socktype = SOCK_DGRAM, |
| 120 | .ai_flags = 0, |
| 121 | .ai_protocol = 0 |
| 122 | }; |
| 123 | char pool[strlen(pool_in)+1]; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 124 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 125 | strcpy(pool, pool_in); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 126 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 127 | int err; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 128 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 129 | /* Find '/' and point to first char after it */ |
| 130 | char *prefixlen_str = strchr(pool, '/'); |
| 131 | if (prefixlen_str) { |
| 132 | *prefixlen_str = '\0'; |
| 133 | prefixlen_str++; |
| 134 | if (*prefixlen_str == '\0') { |
| 135 | SYS_ERR(DIP, LOGL_ERROR, 0, "Empty prefix length specified"); |
| 136 | return -1; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 137 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 138 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 139 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 140 | /* convert address */ |
| 141 | if ((err = getaddrinfo(pool, NULL, &hints, &ai))) { |
| 142 | SYS_ERR(DIP, LOGL_ERROR, 0, "Bad address"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 143 | return -1; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | /* Copy address, set lengths */ |
| 147 | if (ai->ai_family == AF_INET) { |
| 148 | *prefixlen = 32; |
| 149 | addr->len = sizeof(struct in_addr); |
| 150 | addr->v4 = ((struct sockaddr_in*)ai->ai_addr)->sin_addr; |
| 151 | } else { |
| 152 | *prefixlen = 128; |
| 153 | addr->len = sizeof(struct in6_addr); |
| 154 | addr->v6 = ((struct sockaddr_in6*)ai->ai_addr)->sin6_addr; |
| 155 | } |
| 156 | freeaddrinfo(ai); |
| 157 | |
| 158 | /* parse prefixlen */ |
| 159 | if (prefixlen_str) { |
| 160 | char *e; |
| 161 | *prefixlen = strtol(prefixlen_str, &e, 10); |
| 162 | if (*e != '\0') { |
| 163 | SYS_ERR(DIP, LOGL_ERROR, 0, "Prefixlen is not an int"); |
| 164 | return -1; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if (*prefixlen > (addr->len * 8)) { |
| 169 | SYS_ERR(DIP, LOGL_ERROR, 0, "Perfixlen too big"); |
| 170 | return -1; |
| 171 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 172 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 173 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 174 | } |
| 175 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 176 | /* Increase IPv4/IPv6 address by 1 */ |
| 177 | void in46a_inc(struct in46_addr *addr) |
| 178 | { |
| 179 | size_t addrlen; |
| 180 | uint8_t *a = (uint8_t *)&addr->v6; |
| 181 | for (addrlen = addr->len; addrlen > 0; addrlen--) { |
| 182 | if (++a[addrlen-1]) |
| 183 | break; |
| 184 | } |
| 185 | } |
| 186 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 187 | /* Create new address pool */ |
Harald Welte | 53165ed | 2017-08-02 22:58:54 +0200 | [diff] [blame] | 188 | int ippool_new(struct ippool_t **this, const char *dyn, const char *stat, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 189 | int allowdyn, int allowstat, int flags) |
| 190 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 191 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 192 | /* Parse only first instance of pool for now */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 193 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 194 | int i; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 195 | struct in46_addr addr; |
| 196 | size_t addrprefixlen; |
| 197 | struct in46_addr stataddr; |
| 198 | size_t stataddrprefixlen; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 199 | int listsize; |
| 200 | int dynsize; |
| 201 | unsigned int statsize; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 202 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 203 | if (!allowdyn) { |
| 204 | dynsize = 0; |
| 205 | } else { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 206 | if (ippool_aton(&addr, &addrprefixlen, dyn, 0)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 207 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 208 | "Failed to parse dynamic pool"); |
| 209 | return -1; |
| 210 | } |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 211 | /* we want to work with /64 prefixes, i.e. allocate /64 prefixes rather |
| 212 | * than /128 (single IPv6 addresses) */ |
| 213 | if (addr.len == sizeof(struct in6_addr)) |
| 214 | addr.len = 64/8; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 215 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 216 | /* Set IPPOOL_NONETWORK if IPPOOL_NOGATEWAY is set */ |
| 217 | if (flags & IPPOOL_NOGATEWAY) { |
| 218 | flags |= IPPOOL_NONETWORK; |
| 219 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 220 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 221 | dynsize = (1 << (addr.len*8 - addrprefixlen)) -1; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 222 | if (flags & IPPOOL_NONETWORK) /* Exclude network address from pool */ |
| 223 | dynsize--; |
| 224 | if (flags & IPPOOL_NOGATEWAY) /* Exclude gateway address from pool */ |
| 225 | dynsize--; |
| 226 | if (flags & IPPOOL_NOBROADCAST) /* Exclude broadcast address from pool */ |
| 227 | dynsize--; |
| 228 | } |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 229 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 230 | if (!allowstat) { |
| 231 | statsize = 0; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 232 | stataddr.len = 0; |
| 233 | stataddrprefixlen = 0; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 234 | } else { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 235 | if (ippool_aton(&stataddr, &stataddrprefixlen, stat, 0)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 236 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 237 | "Failed to parse static range"); |
| 238 | return -1; |
| 239 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 240 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 241 | statsize = (1 << (addr.len - addrprefixlen + 1)) -1; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 242 | if (statsize > IPPOOL_STATSIZE) |
| 243 | statsize = IPPOOL_STATSIZE; |
| 244 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 245 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 246 | listsize = dynsize + statsize; /* Allocate space for static IP addresses */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 247 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 248 | if (!(*this = calloc(sizeof(struct ippool_t), 1))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 249 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 250 | "Failed to allocate memory for ippool"); |
| 251 | return -1; |
| 252 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 253 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 254 | (*this)->allowdyn = allowdyn; |
| 255 | (*this)->allowstat = allowstat; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 256 | if (stataddr.len > 0) |
| 257 | (*this)->stataddr = stataddr; |
| 258 | (*this)->stataddrprefixlen = stataddrprefixlen; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 259 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 260 | (*this)->listsize += listsize; |
| 261 | if (!((*this)->member = calloc(sizeof(struct ippoolm_t), listsize))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 262 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 263 | "Failed to allocate memory for members in ippool"); |
| 264 | return -1; |
| 265 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 266 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 267 | for ((*this)->hashlog = 0; |
| 268 | ((1 << (*this)->hashlog) < listsize); (*this)->hashlog++) ; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 269 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 270 | /* printf ("Hashlog %d %d %d\n", (*this)->hashlog, listsize, (1 << (*this)->hashlog)); */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 271 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 272 | /* Determine hashsize */ |
| 273 | (*this)->hashsize = 1 << (*this)->hashlog; /* Fails if mask=0: All Internet */ |
| 274 | (*this)->hashmask = (*this)->hashsize - 1; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 275 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 276 | /* Allocate hash table */ |
| 277 | if (! |
| 278 | ((*this)->hash = |
| 279 | calloc(sizeof(struct ippoolm_t), (*this)->hashsize))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 280 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 281 | "Failed to allocate memory for hash members in ippool"); |
| 282 | return -1; |
| 283 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 284 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 285 | (*this)->firstdyn = NULL; |
| 286 | (*this)->lastdyn = NULL; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 287 | if (flags & IPPOOL_NOGATEWAY) { |
| 288 | in46a_inc(&addr); |
| 289 | in46a_inc(&addr); |
| 290 | } else if (flags & IPPOOL_NONETWORK) { |
| 291 | in46a_inc(&addr); |
| 292 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 293 | for (i = 0; i < dynsize; i++) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 294 | (*this)->member[i].addr = addr; |
| 295 | in46a_inc(&addr); |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 296 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 297 | (*this)->member[i].inuse = 0; |
| 298 | |
| 299 | /* Insert into list of unused */ |
| 300 | (*this)->member[i].prev = (*this)->lastdyn; |
| 301 | if ((*this)->lastdyn) { |
| 302 | (*this)->lastdyn->next = &((*this)->member[i]); |
| 303 | } else { |
| 304 | (*this)->firstdyn = &((*this)->member[i]); |
| 305 | } |
| 306 | (*this)->lastdyn = &((*this)->member[i]); |
| 307 | (*this)->member[i].next = NULL; /* Redundant */ |
| 308 | |
| 309 | (void)ippool_hashadd(*this, &(*this)->member[i]); |
| 310 | } |
| 311 | |
| 312 | (*this)->firststat = NULL; |
| 313 | (*this)->laststat = NULL; |
| 314 | for (i = dynsize; i < listsize; i++) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 315 | struct in46_addr *i6al = &(*this)->member[i].addr; |
| 316 | memset(i6al, 0, sizeof(*i6al)); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 317 | (*this)->member[i].inuse = 0; |
| 318 | |
| 319 | /* Insert into list of unused */ |
| 320 | (*this)->member[i].prev = (*this)->laststat; |
| 321 | if ((*this)->laststat) { |
| 322 | (*this)->laststat->next = &((*this)->member[i]); |
| 323 | } else { |
| 324 | (*this)->firststat = &((*this)->member[i]); |
| 325 | } |
| 326 | (*this)->laststat = &((*this)->member[i]); |
| 327 | (*this)->member[i].next = NULL; /* Redundant */ |
| 328 | } |
| 329 | |
| 330 | if (0) |
| 331 | (void)ippool_printaddr(*this); |
| 332 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | /* Delete existing address pool */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 336 | int ippool_free(struct ippool_t *this) |
| 337 | { |
| 338 | free(this->hash); |
| 339 | free(this->member); |
| 340 | free(this); |
| 341 | return 0; /* Always OK */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | /* Find an IP address in the pool */ |
| 345 | int ippool_getip(struct ippool_t *this, struct ippoolm_t **member, |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 346 | struct in46_addr *addr) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 347 | { |
| 348 | struct ippoolm_t *p; |
| 349 | uint32_t hash; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 350 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 351 | /* Find in hash table */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 352 | hash = ippool_hash(addr) & this->hashmask; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 353 | for (p = this->hash[hash]; p; p = p->nexthash) { |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 354 | if (in46a_prefix_equal(&p->addr, addr)) { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 355 | if (member) |
| 356 | *member = p; |
| 357 | return 0; |
| 358 | } |
| 359 | } |
| 360 | if (member) |
| 361 | *member = NULL; |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 362 | /*SYS_ERR(DIP, LOGL_ERROR, 0, "Address could not be found"); */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 363 | return -1; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 364 | } |
| 365 | |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 366 | /** |
| 367 | * ippool_newip |
| 368 | * Get an IP address. If addr = 0.0.0.0 get a dynamic IP address. Otherwise |
| 369 | * check to see if the given address is available. If available within |
| 370 | * dynamic address space allocate it there, otherwise allocate within static |
| 371 | * address space. |
| 372 | **/ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 373 | int ippool_newip(struct ippool_t *this, struct ippoolm_t **member, |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 374 | struct in46_addr *addr, int statip) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 375 | { |
| 376 | struct ippoolm_t *p; |
| 377 | struct ippoolm_t *p2 = NULL; |
| 378 | uint32_t hash; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 379 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 380 | /* If static: |
| 381 | * Look in dynaddr. |
| 382 | * If found remove from firstdyn/lastdyn linked list. |
| 383 | * Else allocate from stataddr. |
| 384 | * Remove from firststat/laststat linked list. |
| 385 | * Insert into hash table. |
| 386 | * |
| 387 | * If dynamic |
| 388 | * Remove from firstdyn/lastdyn linked list. |
| 389 | * |
| 390 | */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 391 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 392 | if (0) |
| 393 | (void)ippool_printaddr(this); |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 394 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 395 | int specified = 0; |
| 396 | if (addr) { |
| 397 | if (addr->len == 4 && addr->v4.s_addr) |
| 398 | specified = 1; |
| 399 | if (addr->len == 16 && !IN6_IS_ADDR_UNSPECIFIED(&addr->v6)) |
| 400 | specified = 1; |
| 401 | } |
| 402 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 403 | /* First check to see if this type of address is allowed */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 404 | if (specified && statip) { /* IP address given */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 405 | if (!this->allowstat) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 406 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 407 | "Static IP address not allowed"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 408 | return -GTPCAUSE_NOT_SUPPORTED; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 409 | } |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 410 | if (!in46a_within_mask(addr, &this->stataddr, this->stataddrprefixlen)) { |
| 411 | SYS_ERR(DIP, LOGL_ERROR, 0, "Static out of range"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 412 | return -1; |
| 413 | } |
| 414 | } else { |
| 415 | if (!this->allowdyn) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 416 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 417 | "Dynamic IP address not allowed"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 418 | return -GTPCAUSE_NOT_SUPPORTED; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 419 | } |
| 420 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 421 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 422 | /* If IP address given try to find it in dynamic address pool */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 423 | if (specified) { /* IP address given */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 424 | /* Find in hash table */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 425 | hash = ippool_hash(addr) & this->hashmask; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 426 | for (p = this->hash[hash]; p; p = p->nexthash) { |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 427 | if (in46a_prefix_equal(&p->addr, addr)) { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 428 | p2 = p; |
| 429 | break; |
| 430 | } |
| 431 | } |
| 432 | } |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 433 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 434 | /* If IP was already allocated we can not use it */ |
| 435 | if ((!statip) && (p2) && (p2->inuse)) { |
| 436 | p2 = NULL; |
| 437 | } |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 438 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 439 | /* If not found yet and dynamic IP then allocate dynamic IP */ |
| 440 | if ((!p2) && (!statip)) { |
| 441 | if (!this->firstdyn) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 442 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 443 | "No more IP addresses available"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 444 | return -GTPCAUSE_ADDR_OCCUPIED; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 445 | } else |
| 446 | p2 = this->firstdyn; |
| 447 | } |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 448 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 449 | if (p2) { /* Was allocated from dynamic address pool */ |
| 450 | if (p2->inuse) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 451 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 452 | "IP address allready in use"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 453 | return -GTPCAUSE_SYS_FAIL; /* Allready in use / Should not happen */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 454 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 455 | |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 456 | if (p2->addr.len != addr->len && !(addr->len == 16 && p2->addr.len == 8)) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 457 | SYS_ERR(DIP, LOGL_ERROR, 0, "MS requested unsupported PDP context type"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 458 | return -GTPCAUSE_UNKNOWN_PDP; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 459 | } |
| 460 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 461 | /* Remove from linked list of free dynamic addresses */ |
| 462 | if (p2->prev) |
| 463 | p2->prev->next = p2->next; |
| 464 | else |
| 465 | this->firstdyn = p2->next; |
| 466 | if (p2->next) |
| 467 | p2->next->prev = p2->prev; |
| 468 | else |
| 469 | this->lastdyn = p2->prev; |
| 470 | p2->next = NULL; |
| 471 | p2->prev = NULL; |
| 472 | p2->inuse = 1; /* Dynamic address in use */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 473 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 474 | *member = p2; |
| 475 | if (0) |
| 476 | (void)ippool_printaddr(this); |
| 477 | return 0; /* Success */ |
| 478 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 479 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 480 | /* It was not possible to allocate from dynamic address pool */ |
| 481 | /* Try to allocate from static address space */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 482 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 483 | if (specified && (statip)) { /* IP address given */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 484 | if (!this->firststat) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 485 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 486 | "No more IP addresses available"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 487 | return -GTPCAUSE_ADDR_OCCUPIED; /* No more available */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 488 | } else |
| 489 | p2 = this->firststat; |
| 490 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 491 | if (p2->addr.len != addr->len) { |
| 492 | SYS_ERR(DIP, LOGL_ERROR, 0, "MS requested unsupported PDP context type"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 493 | return -GTPCAUSE_UNKNOWN_PDP; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 494 | } |
| 495 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 496 | /* Remove from linked list of free static addresses */ |
| 497 | if (p2->prev) |
| 498 | p2->prev->next = p2->next; |
| 499 | else |
| 500 | this->firststat = p2->next; |
| 501 | if (p2->next) |
| 502 | p2->next->prev = p2->prev; |
| 503 | else |
| 504 | this->laststat = p2->prev; |
| 505 | p2->next = NULL; |
| 506 | p2->prev = NULL; |
| 507 | p2->inuse = 2; /* Static address in use */ |
| 508 | memcpy(&p2->addr, addr, sizeof(addr)); |
| 509 | *member = p2; |
| 510 | (void)ippool_hashadd(this, *member); |
| 511 | if (0) |
| 512 | (void)ippool_printaddr(this); |
| 513 | return 0; /* Success */ |
| 514 | } |
| 515 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 516 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 517 | "Could not allocate IP address"); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 518 | return -GTPCAUSE_SYS_FAIL; /* Should never get here. TODO: Bad code */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 519 | } |
| 520 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 521 | int ippool_freeip(struct ippool_t *this, struct ippoolm_t *member) |
| 522 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 523 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 524 | if (0) |
| 525 | (void)ippool_printaddr(this); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 526 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 527 | if (!member->inuse) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 528 | SYS_ERR(DIP, LOGL_ERROR, 0, "Address not in use"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 529 | return -1; /* Not in use: Should not happen */ |
| 530 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 531 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 532 | switch (member->inuse) { |
| 533 | case 0: /* Not in use: Should not happen */ |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 534 | SYS_ERR(DIP, LOGL_ERROR, 0, "Address not in use"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 535 | return -1; |
| 536 | case 1: /* Allocated from dynamic address space */ |
| 537 | /* Insert into list of unused */ |
| 538 | member->prev = this->lastdyn; |
| 539 | if (this->lastdyn) { |
| 540 | this->lastdyn->next = member; |
| 541 | } else { |
| 542 | this->firstdyn = member; |
| 543 | } |
| 544 | this->lastdyn = member; |
| 545 | |
| 546 | member->inuse = 0; |
| 547 | member->peer = NULL; |
| 548 | if (0) |
| 549 | (void)ippool_printaddr(this); |
| 550 | return 0; |
| 551 | case 2: /* Allocated from static address space */ |
| 552 | if (ippool_hashdel(this, member)) |
| 553 | return -1; |
| 554 | /* Insert into list of unused */ |
| 555 | member->prev = this->laststat; |
| 556 | if (this->laststat) { |
| 557 | this->laststat->next = member; |
| 558 | } else { |
| 559 | this->firststat = member; |
| 560 | } |
| 561 | this->laststat = member; |
| 562 | |
| 563 | member->inuse = 0; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 564 | memset(&member->addr, 0, sizeof(member->addr)); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 565 | member->peer = NULL; |
| 566 | member->nexthash = NULL; |
| 567 | if (0) |
| 568 | (void)ippool_printaddr(this); |
| 569 | return 0; |
| 570 | default: /* Should not happen */ |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 571 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 572 | "Could not free IP address"); |
| 573 | return -1; |
| 574 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 575 | } |