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. |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 4 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 5 | * The contents of this file may be used under the terms of the GNU |
| 6 | * General Public License Version 2, provided that the above copyright |
| 7 | * notice and this permission notice is included in all copies or |
| 8 | * substantial portions of the software. |
| 9 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
jjako | 06e9f12 | 2004-01-19 18:37:58 +0000 | [diff] [blame] | 12 | #include <sys/types.h> |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 13 | #include <netinet/in.h> /* in_addr */ |
| 14 | #include <stdlib.h> /* calloc */ |
| 15 | #include <stdio.h> /* sscanf */ |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 16 | #include <string.h> |
| 17 | #include <sys/socket.h> |
| 18 | #include <arpa/inet.h> |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 19 | #include "syserr.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 20 | #include "ippool.h" |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 21 | #include "lookup.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 22 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 23 | int ippool_printaddr(struct ippool_t *this) |
| 24 | { |
| 25 | unsigned int n; |
| 26 | printf("ippool_printaddr\n"); |
| 27 | printf("Firstdyn %d\n", this->firstdyn - this->member); |
| 28 | printf("Lastdyn %d\n", this->lastdyn - this->member); |
| 29 | printf("Firststat %d\n", this->firststat - this->member); |
| 30 | printf("Laststat %d\n", this->laststat - this->member); |
| 31 | printf("Listsize %d\n", this->listsize); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 32 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 33 | for (n = 0; n < this->listsize; n++) { |
| 34 | printf("Unit %d inuse %d prev %d next %d addr %s %x\n", |
| 35 | n, |
| 36 | this->member[n].inuse, |
| 37 | this->member[n].prev - this->member, |
| 38 | this->member[n].next - this->member, |
| 39 | inet_ntoa(this->member[n].addr), |
| 40 | this->member[n].addr.s_addr); |
| 41 | } |
| 42 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 43 | } |
| 44 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 45 | int ippool_hashadd(struct ippool_t *this, struct ippoolm_t *member) |
| 46 | { |
| 47 | uint32_t hash; |
| 48 | struct ippoolm_t *p; |
| 49 | struct ippoolm_t *p_prev = NULL; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 50 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 51 | /* Insert into hash table */ |
| 52 | hash = ippool_hash4(&member->addr) & this->hashmask; |
| 53 | for (p = this->hash[hash]; p; p = p->nexthash) |
| 54 | p_prev = p; |
| 55 | if (!p_prev) |
| 56 | this->hash[hash] = member; |
| 57 | else |
| 58 | p_prev->nexthash = member; |
| 59 | return 0; /* Always OK to insert */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 60 | } |
| 61 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 62 | int ippool_hashdel(struct ippool_t *this, struct ippoolm_t *member) |
| 63 | { |
| 64 | uint32_t hash; |
| 65 | struct ippoolm_t *p; |
| 66 | struct ippoolm_t *p_prev = NULL; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 67 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 68 | /* Find in hash table */ |
| 69 | hash = ippool_hash4(&member->addr) & this->hashmask; |
| 70 | for (p = this->hash[hash]; p; p = p->nexthash) { |
| 71 | if (p == member) { |
| 72 | break; |
| 73 | } |
| 74 | p_prev = p; |
| 75 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 76 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 77 | if (p != member) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 78 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 79 | "ippool_hashdel: Tried to delete member not in hash table"); |
| 80 | return -1; |
| 81 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 82 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 83 | if (!p_prev) |
| 84 | this->hash[hash] = p->nexthash; |
| 85 | else |
| 86 | p_prev->nexthash = p->nexthash; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 87 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 88 | return 0; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 89 | } |
| 90 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 91 | unsigned long int ippool_hash4(struct in_addr *addr) |
| 92 | { |
| 93 | return lookup((unsigned char *)&addr->s_addr, sizeof(addr->s_addr), 0); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | #ifndef IPPOOL_NOIP6 |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 97 | unsigned long int ippool_hash6(struct in6_addr *addr) |
| 98 | { |
| 99 | return lookup((unsigned char *)addr->u6_addr8, sizeof(addr->u6_addr8), |
| 100 | 0); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 101 | } |
| 102 | #endif |
| 103 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 104 | /* Get IP address and mask */ |
| 105 | int ippool_aton(struct in_addr *addr, struct in_addr *mask, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 106 | char *pool, int number) |
| 107 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 108 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 109 | /* Parse only first instance of network for now */ |
| 110 | /* Eventually "number" will indicate the token which we want to parse */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 111 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 112 | unsigned int a1, a2, a3, a4; |
| 113 | unsigned int m1, m2, m3, m4; |
| 114 | int c; |
| 115 | int m; |
| 116 | int masklog; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 117 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 118 | c = sscanf(pool, "%u.%u.%u.%u/%u.%u.%u.%u", |
| 119 | &a1, &a2, &a3, &a4, &m1, &m2, &m3, &m4); |
| 120 | switch (c) { |
| 121 | case 4: |
| 122 | mask->s_addr = 0xffffffff; |
| 123 | break; |
| 124 | case 5: |
| 125 | if (m1 > 32) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 126 | SYS_ERR(DIP, LOGL_ERROR, 0, "Invalid mask"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 127 | return -1; /* Invalid mask */ |
| 128 | } |
| 129 | mask->s_addr = htonl(0xffffffff << (32 - m1)); |
| 130 | break; |
| 131 | case 8: |
| 132 | if (m1 >= 256 || m2 >= 256 || m3 >= 256 || m4 >= 256) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 133 | SYS_ERR(DIP, LOGL_ERROR, 0, "Invalid mask"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 134 | return -1; /* Wrong mask format */ |
| 135 | } |
| 136 | m = m1 * 0x1000000 + m2 * 0x10000 + m3 * 0x100 + m4; |
| 137 | for (masklog = 0; ((1 << masklog) < ((~m) + 1)); masklog++) ; |
| 138 | if (((~m) + 1) != (1 << masklog)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 139 | SYS_ERR(DIP, LOGL_ERROR, 0, "Invalid mask"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 140 | return -1; /* Wrong mask format (not all ones followed by all zeros) */ |
| 141 | } |
| 142 | mask->s_addr = htonl(m); |
| 143 | break; |
| 144 | default: |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 145 | SYS_ERR(DIP, LOGL_ERROR, 0, "Invalid mask"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 146 | return -1; /* Invalid mask */ |
| 147 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 148 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 149 | if (a1 >= 256 || a2 >= 256 || a3 >= 256 || a4 >= 256) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 150 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 151 | "Wrong IP address format"); |
| 152 | return -1; |
| 153 | } else |
| 154 | addr->s_addr = |
| 155 | htonl(a1 * 0x1000000 + a2 * 0x10000 + a3 * 0x100 + a4); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 156 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 157 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | /* Create new address pool */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 161 | int ippool_new(struct ippool_t **this, char *dyn, char *stat, |
| 162 | int allowdyn, int allowstat, int flags) |
| 163 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 164 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 165 | /* Parse only first instance of pool for now */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 166 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 167 | int i; |
| 168 | struct in_addr addr; |
| 169 | struct in_addr mask; |
| 170 | struct in_addr stataddr; |
| 171 | struct in_addr statmask; |
| 172 | unsigned int m; |
| 173 | int listsize; |
| 174 | int dynsize; |
| 175 | unsigned int statsize; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 176 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 177 | if (!allowdyn) { |
| 178 | dynsize = 0; |
| 179 | } else { |
| 180 | if (ippool_aton(&addr, &mask, dyn, 0)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 181 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 182 | "Failed to parse dynamic pool"); |
| 183 | return -1; |
| 184 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 185 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 186 | /* Set IPPOOL_NONETWORK if IPPOOL_NOGATEWAY is set */ |
| 187 | if (flags & IPPOOL_NOGATEWAY) { |
| 188 | flags |= IPPOOL_NONETWORK; |
| 189 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 190 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 191 | m = ntohl(mask.s_addr); |
| 192 | dynsize = ((~m) + 1); |
| 193 | if (flags & IPPOOL_NONETWORK) /* Exclude network address from pool */ |
| 194 | dynsize--; |
| 195 | if (flags & IPPOOL_NOGATEWAY) /* Exclude gateway address from pool */ |
| 196 | dynsize--; |
| 197 | if (flags & IPPOOL_NOBROADCAST) /* Exclude broadcast address from pool */ |
| 198 | dynsize--; |
| 199 | } |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 200 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 201 | if (!allowstat) { |
| 202 | statsize = 0; |
| 203 | stataddr.s_addr = 0; |
| 204 | statmask.s_addr = 0; |
| 205 | } else { |
| 206 | if (ippool_aton(&stataddr, &statmask, stat, 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 static range"); |
| 209 | return -1; |
| 210 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 211 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 212 | m = ntohl(statmask.s_addr); |
| 213 | statsize = ((~m) + 1); |
| 214 | if (statsize > IPPOOL_STATSIZE) |
| 215 | statsize = IPPOOL_STATSIZE; |
| 216 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 217 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 218 | listsize = dynsize + statsize; /* Allocate space for static IP addresses */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 219 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 220 | if (!(*this = calloc(sizeof(struct ippool_t), 1))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 221 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 222 | "Failed to allocate memory for ippool"); |
| 223 | return -1; |
| 224 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 225 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 226 | (*this)->allowdyn = allowdyn; |
| 227 | (*this)->allowstat = allowstat; |
| 228 | (*this)->stataddr = stataddr; |
| 229 | (*this)->statmask = statmask; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 230 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 231 | (*this)->listsize += listsize; |
| 232 | if (!((*this)->member = calloc(sizeof(struct ippoolm_t), listsize))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 233 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 234 | "Failed to allocate memory for members in ippool"); |
| 235 | return -1; |
| 236 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 237 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 238 | for ((*this)->hashlog = 0; |
| 239 | ((1 << (*this)->hashlog) < listsize); (*this)->hashlog++) ; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 240 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 241 | /* printf ("Hashlog %d %d %d\n", (*this)->hashlog, listsize, (1 << (*this)->hashlog)); */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 242 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 243 | /* Determine hashsize */ |
| 244 | (*this)->hashsize = 1 << (*this)->hashlog; /* Fails if mask=0: All Internet */ |
| 245 | (*this)->hashmask = (*this)->hashsize - 1; |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 246 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 247 | /* Allocate hash table */ |
| 248 | if (! |
| 249 | ((*this)->hash = |
| 250 | calloc(sizeof(struct ippoolm_t), (*this)->hashsize))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 251 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 252 | "Failed to allocate memory for hash members in ippool"); |
| 253 | return -1; |
| 254 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 255 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 256 | (*this)->firstdyn = NULL; |
| 257 | (*this)->lastdyn = NULL; |
| 258 | for (i = 0; i < dynsize; i++) { |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 259 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 260 | if (flags & IPPOOL_NOGATEWAY) |
| 261 | (*this)->member[i].addr.s_addr = |
| 262 | htonl(ntohl(addr.s_addr) + i + 2); |
| 263 | else if (flags & IPPOOL_NONETWORK) |
| 264 | (*this)->member[i].addr.s_addr = |
| 265 | htonl(ntohl(addr.s_addr) + i + 1); |
| 266 | else |
| 267 | (*this)->member[i].addr.s_addr = |
| 268 | htonl(ntohl(addr.s_addr) + i); |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 269 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 270 | (*this)->member[i].inuse = 0; |
| 271 | |
| 272 | /* Insert into list of unused */ |
| 273 | (*this)->member[i].prev = (*this)->lastdyn; |
| 274 | if ((*this)->lastdyn) { |
| 275 | (*this)->lastdyn->next = &((*this)->member[i]); |
| 276 | } else { |
| 277 | (*this)->firstdyn = &((*this)->member[i]); |
| 278 | } |
| 279 | (*this)->lastdyn = &((*this)->member[i]); |
| 280 | (*this)->member[i].next = NULL; /* Redundant */ |
| 281 | |
| 282 | (void)ippool_hashadd(*this, &(*this)->member[i]); |
| 283 | } |
| 284 | |
| 285 | (*this)->firststat = NULL; |
| 286 | (*this)->laststat = NULL; |
| 287 | for (i = dynsize; i < listsize; i++) { |
| 288 | |
| 289 | (*this)->member[i].addr.s_addr = 0; |
| 290 | (*this)->member[i].inuse = 0; |
| 291 | |
| 292 | /* Insert into list of unused */ |
| 293 | (*this)->member[i].prev = (*this)->laststat; |
| 294 | if ((*this)->laststat) { |
| 295 | (*this)->laststat->next = &((*this)->member[i]); |
| 296 | } else { |
| 297 | (*this)->firststat = &((*this)->member[i]); |
| 298 | } |
| 299 | (*this)->laststat = &((*this)->member[i]); |
| 300 | (*this)->member[i].next = NULL; /* Redundant */ |
| 301 | } |
| 302 | |
| 303 | if (0) |
| 304 | (void)ippool_printaddr(*this); |
| 305 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | /* Delete existing address pool */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 309 | int ippool_free(struct ippool_t *this) |
| 310 | { |
| 311 | free(this->hash); |
| 312 | free(this->member); |
| 313 | free(this); |
| 314 | return 0; /* Always OK */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | /* Find an IP address in the pool */ |
| 318 | int ippool_getip(struct ippool_t *this, struct ippoolm_t **member, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 319 | struct in_addr *addr) |
| 320 | { |
| 321 | struct ippoolm_t *p; |
| 322 | uint32_t hash; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 323 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 324 | /* Find in hash table */ |
| 325 | hash = ippool_hash4(addr) & this->hashmask; |
| 326 | for (p = this->hash[hash]; p; p = p->nexthash) { |
| 327 | if ((p->addr.s_addr == addr->s_addr) && (p->inuse)) { |
| 328 | if (member) |
| 329 | *member = p; |
| 330 | return 0; |
| 331 | } |
| 332 | } |
| 333 | if (member) |
| 334 | *member = NULL; |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 335 | /*SYS_ERR(DIP, LOGL_ERROR, 0, "Address could not be found"); */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 336 | return -1; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 337 | } |
| 338 | |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 339 | /** |
| 340 | * ippool_newip |
| 341 | * Get an IP address. If addr = 0.0.0.0 get a dynamic IP address. Otherwise |
| 342 | * check to see if the given address is available. If available within |
| 343 | * dynamic address space allocate it there, otherwise allocate within static |
| 344 | * address space. |
| 345 | **/ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 346 | int ippool_newip(struct ippool_t *this, struct ippoolm_t **member, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 347 | struct in_addr *addr, int statip) |
| 348 | { |
| 349 | struct ippoolm_t *p; |
| 350 | struct ippoolm_t *p2 = NULL; |
| 351 | uint32_t hash; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 352 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 353 | /* If static: |
| 354 | * Look in dynaddr. |
| 355 | * If found remove from firstdyn/lastdyn linked list. |
| 356 | * Else allocate from stataddr. |
| 357 | * Remove from firststat/laststat linked list. |
| 358 | * Insert into hash table. |
| 359 | * |
| 360 | * If dynamic |
| 361 | * Remove from firstdyn/lastdyn linked list. |
| 362 | * |
| 363 | */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 364 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 365 | if (0) |
| 366 | (void)ippool_printaddr(this); |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 367 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 368 | /* First check to see if this type of address is allowed */ |
| 369 | if ((addr) && (addr->s_addr) && statip) { /* IP address given */ |
| 370 | if (!this->allowstat) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 371 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 372 | "Static IP address not allowed"); |
| 373 | return -1; |
| 374 | } |
| 375 | if ((addr->s_addr & this->statmask.s_addr) != |
| 376 | this->stataddr.s_addr) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 377 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 378 | "Static out of range"); |
| 379 | return -1; |
| 380 | } |
| 381 | } else { |
| 382 | if (!this->allowdyn) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 383 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 384 | "Dynamic IP address not allowed"); |
| 385 | return -1; |
| 386 | } |
| 387 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 388 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 389 | /* If IP address given try to find it in dynamic address pool */ |
| 390 | if ((addr) && (addr->s_addr)) { /* IP address given */ |
| 391 | /* Find in hash table */ |
| 392 | hash = ippool_hash4(addr) & this->hashmask; |
| 393 | for (p = this->hash[hash]; p; p = p->nexthash) { |
| 394 | if ((p->addr.s_addr == addr->s_addr)) { |
| 395 | p2 = p; |
| 396 | break; |
| 397 | } |
| 398 | } |
| 399 | } |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 400 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 401 | /* If IP was already allocated we can not use it */ |
| 402 | if ((!statip) && (p2) && (p2->inuse)) { |
| 403 | p2 = NULL; |
| 404 | } |
jjako | ada9ffa | 2004-12-30 16:39:11 +0000 | [diff] [blame] | 405 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 406 | /* If not found yet and dynamic IP then allocate dynamic IP */ |
| 407 | if ((!p2) && (!statip)) { |
| 408 | if (!this->firstdyn) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 409 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 410 | "No more IP addresses available"); |
| 411 | return -1; |
| 412 | } else |
| 413 | p2 = this->firstdyn; |
| 414 | } |
jjako | c321396 | 2004-09-09 20:23:50 +0000 | [diff] [blame] | 415 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 416 | if (p2) { /* Was allocated from dynamic address pool */ |
| 417 | if (p2->inuse) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 418 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 419 | "IP address allready in use"); |
| 420 | return -1; /* Allready in use / Should not happen */ |
| 421 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 422 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 423 | /* Remove from linked list of free dynamic addresses */ |
| 424 | if (p2->prev) |
| 425 | p2->prev->next = p2->next; |
| 426 | else |
| 427 | this->firstdyn = p2->next; |
| 428 | if (p2->next) |
| 429 | p2->next->prev = p2->prev; |
| 430 | else |
| 431 | this->lastdyn = p2->prev; |
| 432 | p2->next = NULL; |
| 433 | p2->prev = NULL; |
| 434 | p2->inuse = 1; /* Dynamic address in use */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 435 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 436 | *member = p2; |
| 437 | if (0) |
| 438 | (void)ippool_printaddr(this); |
| 439 | return 0; /* Success */ |
| 440 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 441 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 442 | /* It was not possible to allocate from dynamic address pool */ |
| 443 | /* Try to allocate from static address space */ |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 444 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 445 | if ((addr) && (addr->s_addr) && (statip)) { /* IP address given */ |
| 446 | if (!this->firststat) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 447 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 448 | "No more IP addresses available"); |
| 449 | return -1; /* No more available */ |
| 450 | } else |
| 451 | p2 = this->firststat; |
| 452 | |
| 453 | /* Remove from linked list of free static addresses */ |
| 454 | if (p2->prev) |
| 455 | p2->prev->next = p2->next; |
| 456 | else |
| 457 | this->firststat = p2->next; |
| 458 | if (p2->next) |
| 459 | p2->next->prev = p2->prev; |
| 460 | else |
| 461 | this->laststat = p2->prev; |
| 462 | p2->next = NULL; |
| 463 | p2->prev = NULL; |
| 464 | p2->inuse = 2; /* Static address in use */ |
| 465 | memcpy(&p2->addr, addr, sizeof(addr)); |
| 466 | *member = p2; |
| 467 | (void)ippool_hashadd(this, *member); |
| 468 | if (0) |
| 469 | (void)ippool_printaddr(this); |
| 470 | return 0; /* Success */ |
| 471 | } |
| 472 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 473 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 474 | "Could not allocate IP address"); |
| 475 | return -1; /* Should never get here. TODO: Bad code */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 476 | } |
| 477 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 478 | int ippool_freeip(struct ippool_t *this, struct ippoolm_t *member) |
| 479 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 480 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 481 | if (0) |
| 482 | (void)ippool_printaddr(this); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 483 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 484 | if (!member->inuse) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 485 | SYS_ERR(DIP, LOGL_ERROR, 0, "Address not in use"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 486 | return -1; /* Not in use: Should not happen */ |
| 487 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 488 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 489 | switch (member->inuse) { |
| 490 | case 0: /* Not in use: Should not happen */ |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 491 | SYS_ERR(DIP, LOGL_ERROR, 0, "Address not in use"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 492 | return -1; |
| 493 | case 1: /* Allocated from dynamic address space */ |
| 494 | /* Insert into list of unused */ |
| 495 | member->prev = this->lastdyn; |
| 496 | if (this->lastdyn) { |
| 497 | this->lastdyn->next = member; |
| 498 | } else { |
| 499 | this->firstdyn = member; |
| 500 | } |
| 501 | this->lastdyn = member; |
| 502 | |
| 503 | member->inuse = 0; |
| 504 | member->peer = NULL; |
| 505 | if (0) |
| 506 | (void)ippool_printaddr(this); |
| 507 | return 0; |
| 508 | case 2: /* Allocated from static address space */ |
| 509 | if (ippool_hashdel(this, member)) |
| 510 | return -1; |
| 511 | /* Insert into list of unused */ |
| 512 | member->prev = this->laststat; |
| 513 | if (this->laststat) { |
| 514 | this->laststat->next = member; |
| 515 | } else { |
| 516 | this->firststat = member; |
| 517 | } |
| 518 | this->laststat = member; |
| 519 | |
| 520 | member->inuse = 0; |
| 521 | member->addr.s_addr = 0; |
| 522 | member->peer = NULL; |
| 523 | member->nexthash = NULL; |
| 524 | if (0) |
| 525 | (void)ippool_printaddr(this); |
| 526 | return 0; |
| 527 | default: /* Should not happen */ |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 528 | SYS_ERR(DIP, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 529 | "Could not free IP address"); |
| 530 | return -1; |
| 531 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 532 | } |
| 533 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 534 | #ifndef IPPOOL_NOIP6 |
| 535 | extern unsigned long int ippool_hash6(struct in6_addr *addr); |
| 536 | extern int ippool_getip6(struct ippool_t *this, struct in6_addr *addr); |
| 537 | extern int ippool_returnip6(struct ippool_t *this, struct in6_addr *addr); |
| 538 | #endif |