diff options
Diffstat (limited to 'ggsn/ippool.c')
| -rw-r--r-- | ggsn/ippool.c | 526 |
1 files changed, 0 insertions, 526 deletions
diff --git a/ggsn/ippool.c b/ggsn/ippool.c deleted file mode 100644 index fa3d8af..0000000 --- a/ggsn/ippool.c +++ /dev/null @@ -1,526 +0,0 @@ -/* - * IP address pool functions. - * Copyright (C) 2003, 2004 Mondru AB. - * - * The contents of this file may be used under the terms of the GNU - * General Public License Version 2, provided that the above copyright - * notice and this permission notice is included in all copies or - * substantial portions of the software. - * - */ - -#include <sys/types.h> -#include <netinet/in.h> /* in_addr */ -#include <stdlib.h> /* calloc */ -#include <stdio.h> /* sscanf */ -#include <syslog.h> -#include <string.h> -#include <sys/socket.h> -#include <arpa/inet.h> -#include "syserr.h" -#include "ippool.h" -#include "lookup.h" - - -int ippool_printaddr(struct ippool_t *this) { - unsigned int n; - printf("ippool_printaddr\n"); - printf("Firstdyn %d\n", this->firstdyn - this->member); - printf("Lastdyn %d\n", this->lastdyn - this->member); - printf("Firststat %d\n", this->firststat - this->member); - printf("Laststat %d\n", this->laststat - this->member); - printf("Listsize %d\n", this->listsize); - - for (n=0; n<this->listsize; n++) { - printf("Unit %d inuse %d prev %d next %d addr %s %x\n", - n, - this->member[n].inuse, - this->member[n].prev - this->member, - this->member[n].next - this->member, - inet_ntoa(this->member[n].addr), - this->member[n].addr.s_addr - ); - } - return 0; -} - -int ippool_hashadd(struct ippool_t *this, struct ippoolm_t *member) { - uint32_t hash; - struct ippoolm_t *p; - struct ippoolm_t *p_prev = NULL; - - /* Insert into hash table */ - hash = ippool_hash4(&member->addr) & this->hashmask; - for (p = this->hash[hash]; p; p = p->nexthash) - p_prev = p; - if (!p_prev) - this->hash[hash] = member; - else - p_prev->nexthash = member; - return 0; /* Always OK to insert */ -} - -int ippool_hashdel(struct ippool_t *this, struct ippoolm_t *member) { - uint32_t hash; - struct ippoolm_t *p; - struct ippoolm_t *p_prev = NULL; - - /* Find in hash table */ - hash = ippool_hash4(&member->addr) & this->hashmask; - for (p = this->hash[hash]; p; p = p->nexthash) { - if (p == member) { - break; - } - p_prev = p; - } - - if (p!= member) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "ippool_hashdel: Tried to delete member not in hash table"); - return -1; - } - - if (!p_prev) - this->hash[hash] = p->nexthash; - else - p_prev->nexthash = p->nexthash; - - return 0; -} - - -unsigned long int ippool_hash4(struct in_addr *addr) { - return lookup((unsigned char*) &addr->s_addr, sizeof(addr->s_addr), 0); -} - -#ifndef IPPOOL_NOIP6 -unsigned long int ippool_hash6(struct in6_addr *addr) { - return lookup((unsigned char*) addr->u6_addr8, sizeof(addr->u6_addr8), 0); -} -#endif - - -/* Get IP address and mask */ -int ippool_aton(struct in_addr *addr, struct in_addr *mask, - char *pool, int number) { - - /* Parse only first instance of network for now */ - /* Eventually "number" will indicate the token which we want to parse */ - - unsigned int a1, a2, a3, a4; - unsigned int m1, m2, m3, m4; - int c; - int m; - int masklog; - - c = sscanf(pool, "%u.%u.%u.%u/%u.%u.%u.%u", - &a1, &a2, &a3, &a4, - &m1, &m2, &m3, &m4); - switch (c) { - case 4: - mask->s_addr = 0xffffffff; - break; - case 5: - if (m1 > 32) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Invalid mask"); - return -1; /* Invalid mask */ - } - mask->s_addr = htonl(0xffffffff << (32 - m1)); - break; - case 8: - if (m1 >= 256 || m2 >= 256 || m3 >= 256 || m4 >= 256) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Invalid mask"); - return -1; /* Wrong mask format */ - } - m = m1 * 0x1000000 + m2 * 0x10000 + m3 * 0x100 + m4; - for (masklog = 0; ((1 << masklog) < ((~m)+1)); masklog++); - if (((~m)+1) != (1 << masklog)) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Invalid mask"); - return -1; /* Wrong mask format (not all ones followed by all zeros)*/ - } - mask->s_addr = htonl(m); - break; - default: - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Invalid mask"); - return -1; /* Invalid mask */ - } - - if (a1 >= 256 || a2 >= 256 || a3 >= 256 || a4 >= 256) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Wrong IP address format"); - return -1; - } - else - addr->s_addr = htonl(a1 * 0x1000000 + a2 * 0x10000 + a3 * 0x100 + a4); - - return 0; -} - -/* Create new address pool */ -int ippool_new(struct ippool_t **this, char *dyn, char *stat, - int allowdyn, int allowstat, int flags) { - - /* Parse only first instance of pool for now */ - - int i; - struct in_addr addr; - struct in_addr mask; - struct in_addr stataddr; - struct in_addr statmask; - unsigned int m; - int listsize; - int dynsize; - unsigned int statsize; - - if (!allowdyn) { - dynsize = 0; - } - else { - if (ippool_aton(&addr, &mask, dyn, 0)) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Failed to parse dynamic pool"); - return -1; - } - - /* Set IPPOOL_NONETWORK if IPPOOL_NOGATEWAY is set */ - if (flags & IPPOOL_NOGATEWAY) { - flags |= IPPOOL_NONETWORK; - } - - m = ntohl(mask.s_addr); - dynsize = ((~m)+1); - if (flags & IPPOOL_NONETWORK) /* Exclude network address from pool */ - dynsize--; - if (flags & IPPOOL_NOGATEWAY) /* Exclude gateway address from pool */ - dynsize--; - if (flags & IPPOOL_NOBROADCAST) /* Exclude broadcast address from pool */ - dynsize--; - } - - if (!allowstat) { - statsize = 0; - stataddr.s_addr = 0; - statmask.s_addr = 0; - } - else { - if (ippool_aton(&stataddr, &statmask, stat, 0)) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Failed to parse static range"); - return -1; - } - - m = ntohl(statmask.s_addr); - statsize = ((~m)+1); - if (statsize > IPPOOL_STATSIZE) statsize = IPPOOL_STATSIZE; - } - - listsize = dynsize + statsize; /* Allocate space for static IP addresses */ - - if (!(*this = calloc(sizeof(struct ippool_t), 1))) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Failed to allocate memory for ippool"); - return -1; - } - - (*this)->allowdyn = allowdyn; - (*this)->allowstat = allowstat; - (*this)->stataddr = stataddr; - (*this)->statmask = statmask; - - (*this)->listsize += listsize; - if (!((*this)->member = calloc(sizeof(struct ippoolm_t), listsize))){ - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Failed to allocate memory for members in ippool"); - return -1; - } - - for ((*this)->hashlog = 0; - ((1 << (*this)->hashlog) < listsize); - (*this)->hashlog++); - - /* printf ("Hashlog %d %d %d\n", (*this)->hashlog, listsize, (1 << (*this)->hashlog)); */ - - /* Determine hashsize */ - (*this)->hashsize = 1 << (*this)->hashlog; /* Fails if mask=0: All Internet*/ - (*this)->hashmask = (*this)->hashsize -1; - - /* Allocate hash table */ - if (!((*this)->hash = calloc(sizeof(struct ippoolm_t), (*this)->hashsize))){ - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Failed to allocate memory for hash members in ippool"); - return -1; - } - - (*this)->firstdyn = NULL; - (*this)->lastdyn = NULL; - for (i = 0; i<dynsize; i++) { - - if (flags & IPPOOL_NOGATEWAY) - (*this)->member[i].addr.s_addr = htonl(ntohl(addr.s_addr) + i + 2); - else if (flags & IPPOOL_NONETWORK) - (*this)->member[i].addr.s_addr = htonl(ntohl(addr.s_addr) + i + 1); - else - (*this)->member[i].addr.s_addr = htonl(ntohl(addr.s_addr) + i); - - (*this)->member[i].inuse = 0; - - /* Insert into list of unused */ - (*this)->member[i].prev = (*this)->lastdyn; - if ((*this)->lastdyn) { - (*this)->lastdyn->next = &((*this)->member[i]); - } - else { - (*this)->firstdyn = &((*this)->member[i]); - } - (*this)->lastdyn = &((*this)->member[i]); - (*this)->member[i].next = NULL; /* Redundant */ - - ( void)ippool_hashadd(*this, &(*this)->member[i]); - } - - (*this)->firststat = NULL; - (*this)->laststat = NULL; - for (i = dynsize; i<listsize; i++) { - - (*this)->member[i].addr.s_addr = 0; - (*this)->member[i].inuse = 0; - - /* Insert into list of unused */ - (*this)->member[i].prev = (*this)->laststat; - if ((*this)->laststat) { - (*this)->laststat->next = &((*this)->member[i]); - } - else { - (*this)->firststat = &((*this)->member[i]); - } - (*this)->laststat = &((*this)->member[i]); - (*this)->member[i].next = NULL; /* Redundant */ - } - - if (0) (void)ippool_printaddr(*this); - return 0; -} - - - -/* Delete existing address pool */ -int ippool_free(struct ippool_t *this) { - free(this->hash); - free(this->member); - free(this); - return 0; /* Always OK */ -} - -/* Find an IP address in the pool */ -int ippool_getip(struct ippool_t *this, struct ippoolm_t **member, - struct in_addr *addr) { - struct ippoolm_t *p; - uint32_t hash; - - /* Find in hash table */ - hash = ippool_hash4(addr) & this->hashmask; - for (p = this->hash[hash]; p; p = p->nexthash) { - if ((p->addr.s_addr == addr->s_addr) && (p->inuse)) { - if (member) *member = p; - return 0; - } - } - if (member) *member = NULL; - /*sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Address could not be found");*/ - return -1; -} - -/** - * ippool_newip - * Get an IP address. If addr = 0.0.0.0 get a dynamic IP address. Otherwise - * check to see if the given address is available. If available within - * dynamic address space allocate it there, otherwise allocate within static - * address space. -**/ -int ippool_newip(struct ippool_t *this, struct ippoolm_t **member, - struct in_addr *addr, int statip) { - struct ippoolm_t *p; - struct ippoolm_t *p2 = NULL; - uint32_t hash; - - /* If static: - * Look in dynaddr. - * If found remove from firstdyn/lastdyn linked list. - * Else allocate from stataddr. - * Remove from firststat/laststat linked list. - * Insert into hash table. - * - * If dynamic - * Remove from firstdyn/lastdyn linked list. - * - */ - - if (0) (void)ippool_printaddr(this); - - /* First check to see if this type of address is allowed */ - if ((addr) && (addr->s_addr) && statip) { /* IP address given */ - if (!this->allowstat) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Static IP address not allowed"); - return -1; - } - if ((addr->s_addr & this->statmask.s_addr) != this->stataddr.s_addr) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Static out of range"); - return -1; - } - } - else { - if (!this->allowdyn) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Dynamic IP address not allowed"); - return -1; - } - } - - /* If IP address given try to find it in dynamic address pool */ - if ((addr) && (addr->s_addr)) { /* IP address given */ - /* Find in hash table */ - hash = ippool_hash4(addr) & this->hashmask; - for (p = this->hash[hash]; p; p = p->nexthash) { - if ((p->addr.s_addr == addr->s_addr)) { - p2 = p; - break; - } - } - } - - /* If IP was already allocated we can not use it */ - if ((!statip) && (p2) && (p2->inuse)) { - p2 = NULL; - } - - /* If not found yet and dynamic IP then allocate dynamic IP */ - if ((!p2) && (!statip)) { - if (!this ->firstdyn) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "No more IP addresses available"); - return -1; - } - else - p2 = this ->firstdyn; - } - - if (p2) { /* Was allocated from dynamic address pool */ - if (p2->inuse) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "IP address allready in use"); - return -1; /* Allready in use / Should not happen */ - } - - /* Remove from linked list of free dynamic addresses */ - if (p2->prev) - p2->prev->next = p2->next; - else - this->firstdyn = p2->next; - if (p2->next) - p2->next->prev = p2->prev; - else - this->lastdyn = p2->prev; - p2->next = NULL; - p2->prev = NULL; - p2->inuse = 1; /* Dynamic address in use */ - - *member = p2; - if (0) (void)ippool_printaddr(this); - return 0; /* Success */ - } - - /* It was not possible to allocate from dynamic address pool */ - /* Try to allocate from static address space */ - - if ((addr) && (addr->s_addr) && (statip)) { /* IP address given */ - if (!this->firststat) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "No more IP addresses available"); - return -1; /* No more available */ - } - else - p2 = this ->firststat; - - /* Remove from linked list of free static addresses */ - if (p2->prev) - p2->prev->next = p2->next; - else - this->firststat = p2->next; - if (p2->next) - p2->next->prev = p2->prev; - else - this->laststat = p2->prev; - p2->next = NULL; - p2->prev = NULL; - p2->inuse = 2; /* Static address in use */ - memcpy(&p2->addr, addr, sizeof(addr)); - *member = p2; - (void)ippool_hashadd(this, *member); - if (0) (void)ippool_printaddr(this); - return 0; /* Success */ - } - - sys_err(LOG_ERR, __FILE__, __LINE__, 0, - "Could not allocate IP address"); - return -1; /* Should never get here. TODO: Bad code */ -} - - -int ippool_freeip(struct ippool_t *this, struct ippoolm_t *member) { - - if (0) (void)ippool_printaddr(this); - - if (!member->inuse) { - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Address not in use"); - return -1; /* Not in use: Should not happen */ - } - - switch (member->inuse) { - case 0: /* Not in use: Should not happen */ - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Address not in use"); - return -1; - case 1: /* Allocated from dynamic address space */ - /* Insert into list of unused */ - member->prev = this->lastdyn; - if (this->lastdyn) { - this->lastdyn->next = member; - } - else { - this->firstdyn = member; - } - this->lastdyn = member; - - member->inuse = 0; - member->peer = NULL; - if (0) (void)ippool_printaddr(this); - return 0; - case 2: /* Allocated from static address space */ - if (ippool_hashdel(this, member)) - return -1; - /* Insert into list of unused */ - member->prev = this->laststat; - if (this->laststat) { - this->laststat->next = member; - } - else { - this->firststat = member; - } - this->laststat = member; - - member->inuse = 0; - member->addr.s_addr = 0; - member->peer = NULL; - member->nexthash = NULL; - if (0) (void)ippool_printaddr(this); - return 0; - default: /* Should not happen */ - sys_err(LOG_ERR, __FILE__, __LINE__, 0, "Could not free IP address"); - return -1; - } -} - - -#ifndef IPPOOL_NOIP6 -extern unsigned long int ippool_hash6(struct in6_addr *addr); -extern int ippool_getip6(struct ippool_t *this, struct in6_addr *addr); -extern int ippool_returnip6(struct ippool_t *this, struct in6_addr *addr); -#endif |