| /* |
| * Copyright (C) 2002-2003 by Darren Reed. |
| * |
| * See the IPFILTER.LICENCE file for details on licencing. |
| */ |
| #if defined(KERNEL) || defined(_KERNEL) |
| # undef KERNEL |
| # undef _KERNEL |
| # define KERNEL 1 |
| # define _KERNEL 1 |
| #endif |
| #if defined(__osf__) |
| # define _PROTO_NET_H_ |
| #endif |
| #include <sys/param.h> |
| #include <sys/errno.h> |
| #include <sys/types.h> |
| #include <sys/time.h> |
| #include <sys/file.h> |
| #if __FreeBSD_version >= 220000 && defined(_KERNEL) |
| # include <sys/fcntl.h> |
| # include <sys/filio.h> |
| #else |
| # include <sys/ioctl.h> |
| #endif |
| #if !defined(_KERNEL) |
| # include <string.h> |
| # define _KERNEL |
| # ifdef __OpenBSD__ |
| struct file; |
| # endif |
| # include <sys/uio.h> |
| # undef _KERNEL |
| #endif |
| #include <sys/socket.h> |
| #if (defined(__osf__) || defined(AIX) || defined(__hpux) || defined(__sgi)) && defined(_KERNEL) |
| # include "radix_ipf_local.h" |
| # define _RADIX_H_ |
| #endif |
| #include <net/if.h> |
| #if defined(__FreeBSD__) |
| # include <sys/cdefs.h> |
| # include <sys/proc.h> |
| #endif |
| #if defined(_KERNEL) |
| # include <sys/systm.h> |
| # if !defined(__SVR4) && !defined(__svr4__) |
| # include <sys/mbuf.h> |
| # endif |
| #endif |
| #include <netinet/in.h> |
| |
| #include "netinet/ip_compat.h" |
| #include "netinet/ip_fil.h" |
| #include "netinet/ip_pool.h" |
| #include "netinet/ip_htable.h" |
| #include "netinet/ip_lookup.h" |
| /* END OF INCLUDES */ |
| |
| #if !defined(lint) |
| static const char rcsid[] = "@(#)$Id$"; |
| #endif |
| |
| #ifdef IPFILTER_LOOKUP |
| int ip_lookup_inited = 0; |
| |
| static int iplookup_addnode __P((caddr_t)); |
| static int iplookup_delnode __P((caddr_t data)); |
| static int iplookup_addtable __P((caddr_t)); |
| static int iplookup_deltable __P((caddr_t)); |
| static int iplookup_stats __P((caddr_t)); |
| static int iplookup_flush __P((caddr_t)); |
| static int iplookup_iterate __P((void *, int, void *)); |
| static int iplookup_deltok __P((void *, int, void *)); |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_init */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: Nil */ |
| /* */ |
| /* Initialise all of the subcomponents of the lookup infrstructure. */ |
| /* ------------------------------------------------------------------------ */ |
| int ip_lookup_init() |
| { |
| |
| if (ip_pool_init() == -1) |
| return -1; |
| |
| RWLOCK_INIT(&ip_poolrw, "ip pool rwlock"); |
| |
| ip_lookup_inited = 1; |
| |
| return 0; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_unload */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: Nil */ |
| /* */ |
| /* Free up all pool related memory that has been allocated whilst IPFilter */ |
| /* has been running. Also, do any other deinitialisation required such */ |
| /* ip_lookup_init() can be called again, safely. */ |
| /* ------------------------------------------------------------------------ */ |
| void ip_lookup_unload() |
| { |
| ip_pool_fini(); |
| fr_htable_unload(); |
| |
| if (ip_lookup_inited == 1) { |
| RW_DESTROY(&ip_poolrw); |
| ip_lookup_inited = 0; |
| } |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_ioctl */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(IO) - pointer to ioctl data to be copied to/from user */ |
| /* space. */ |
| /* cmd(I) - ioctl command number */ |
| /* mode(I) - file mode bits used with open */ |
| /* */ |
| /* Handle ioctl commands sent to the ioctl device. For the most part, this */ |
| /* involves just calling another function to handle the specifics of each */ |
| /* command. */ |
| /* ------------------------------------------------------------------------ */ |
| int ip_lookup_ioctl(data, cmd, mode, uid, ctx) |
| caddr_t data; |
| ioctlcmd_t cmd; |
| int mode, uid; |
| void *ctx; |
| { |
| int err; |
| SPL_INT(s); |
| |
| mode = mode; /* LINT */ |
| |
| SPL_NET(s); |
| |
| switch (cmd) |
| { |
| case SIOCLOOKUPADDNODE : |
| case SIOCLOOKUPADDNODEW : |
| WRITE_ENTER(&ip_poolrw); |
| err = iplookup_addnode(data); |
| RWLOCK_EXIT(&ip_poolrw); |
| break; |
| |
| case SIOCLOOKUPDELNODE : |
| case SIOCLOOKUPDELNODEW : |
| WRITE_ENTER(&ip_poolrw); |
| err = iplookup_delnode(data); |
| RWLOCK_EXIT(&ip_poolrw); |
| break; |
| |
| case SIOCLOOKUPADDTABLE : |
| WRITE_ENTER(&ip_poolrw); |
| err = iplookup_addtable(data); |
| RWLOCK_EXIT(&ip_poolrw); |
| break; |
| |
| case SIOCLOOKUPDELTABLE : |
| WRITE_ENTER(&ip_poolrw); |
| err = iplookup_deltable(data); |
| RWLOCK_EXIT(&ip_poolrw); |
| break; |
| |
| case SIOCLOOKUPSTAT : |
| case SIOCLOOKUPSTATW : |
| WRITE_ENTER(&ip_poolrw); |
| err = iplookup_stats(data); |
| RWLOCK_EXIT(&ip_poolrw); |
| break; |
| |
| case SIOCLOOKUPFLUSH : |
| WRITE_ENTER(&ip_poolrw); |
| err = iplookup_flush(data); |
| RWLOCK_EXIT(&ip_poolrw); |
| break; |
| |
| case SIOCLOOKUPITER : |
| err = iplookup_iterate(data, uid, ctx); |
| break; |
| |
| case SIOCIPFDELTOK : |
| err = iplookup_deltok(data, uid, ctx); |
| break; |
| |
| default : |
| err = EINVAL; |
| break; |
| } |
| SPL_X(s); |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_addnode */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* Add a new data node to a lookup structure. First, check to see if the */ |
| /* parent structure refered to by name exists and if it does, then go on to */ |
| /* add a node to it. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_addnode(data) |
| caddr_t data; |
| { |
| ip_pool_node_t node, *m; |
| iplookupop_t op; |
| iphtable_t *iph; |
| iphtent_t hte; |
| ip_pool_t *p; |
| int err; |
| |
| err = BCOPYIN(data, &op, sizeof(op)); |
| if (err != 0) |
| return EFAULT; |
| |
| if (op.iplo_unit < 0 || op.iplo_unit > IPL_LOGMAX) |
| return EINVAL; |
| |
| op.iplo_name[sizeof(op.iplo_name) - 1] = '\0'; |
| |
| switch (op.iplo_type) |
| { |
| case IPLT_POOL : |
| if (op.iplo_size != sizeof(node)) |
| return EINVAL; |
| |
| err = COPYIN(op.iplo_struct, &node, sizeof(node)); |
| if (err != 0) |
| return EFAULT; |
| |
| p = ip_pool_find(op.iplo_unit, op.iplo_name); |
| if (p == NULL) |
| return ESRCH; |
| |
| /* |
| * add an entry to a pool - return an error if it already |
| * exists remove an entry from a pool - if it exists |
| * - in both cases, the pool *must* exist! |
| */ |
| m = ip_pool_findeq(p, &node.ipn_addr, &node.ipn_mask); |
| if (m) |
| return EEXIST; |
| err = ip_pool_insert(p, &node.ipn_addr.adf_addr, |
| &node.ipn_mask.adf_addr, node.ipn_info); |
| break; |
| |
| case IPLT_HASH : |
| if (op.iplo_size != sizeof(hte)) |
| return EINVAL; |
| |
| err = COPYIN(op.iplo_struct, &hte, sizeof(hte)); |
| if (err != 0) |
| return EFAULT; |
| |
| iph = fr_findhtable(op.iplo_unit, op.iplo_name); |
| if (iph == NULL) |
| return ESRCH; |
| err = fr_addhtent(iph, &hte); |
| break; |
| |
| default : |
| err = EINVAL; |
| break; |
| } |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_delnode */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* Delete a node from a lookup table by first looking for the table it is */ |
| /* in and then deleting the entry that gets found. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_delnode(data) |
| caddr_t data; |
| { |
| ip_pool_node_t node, *m; |
| iplookupop_t op; |
| iphtable_t *iph; |
| iphtent_t hte; |
| ip_pool_t *p; |
| int err; |
| |
| err = BCOPYIN(data, &op, sizeof(op)); |
| if (err != 0) |
| return EFAULT; |
| |
| if (op.iplo_unit < 0 || op.iplo_unit > IPL_LOGMAX) |
| return EINVAL; |
| |
| op.iplo_name[sizeof(op.iplo_name) - 1] = '\0'; |
| |
| switch (op.iplo_type) |
| { |
| case IPLT_POOL : |
| if (op.iplo_size != sizeof(node)) |
| return EINVAL; |
| |
| err = COPYIN(op.iplo_struct, &node, sizeof(node)); |
| if (err != 0) |
| return EFAULT; |
| |
| p = ip_pool_find(op.iplo_unit, op.iplo_name); |
| if (!p) |
| return ESRCH; |
| |
| m = ip_pool_findeq(p, &node.ipn_addr, &node.ipn_mask); |
| if (m == NULL) |
| return ENOENT; |
| err = ip_pool_remove(p, m); |
| break; |
| |
| case IPLT_HASH : |
| if (op.iplo_size != sizeof(hte)) |
| return EINVAL; |
| |
| err = COPYIN(op.iplo_struct, &hte, sizeof(hte)); |
| if (err != 0) |
| return EFAULT; |
| |
| iph = fr_findhtable(op.iplo_unit, op.iplo_name); |
| if (iph == NULL) |
| return ESRCH; |
| err = fr_delhtent(iph, &hte); |
| break; |
| |
| default : |
| err = EINVAL; |
| break; |
| } |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_addtable */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* Create a new lookup table, if one doesn't already exist using the name */ |
| /* for this one. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_addtable(data) |
| caddr_t data; |
| { |
| iplookupop_t op; |
| int err; |
| |
| err = BCOPYIN(data, &op, sizeof(op)); |
| if (err != 0) |
| return EFAULT; |
| |
| if (op.iplo_unit < 0 || op.iplo_unit > IPL_LOGMAX) |
| return EINVAL; |
| |
| op.iplo_name[sizeof(op.iplo_name) - 1] = '\0'; |
| |
| switch (op.iplo_type) |
| { |
| case IPLT_POOL : |
| if (ip_pool_find(op.iplo_unit, op.iplo_name) != NULL) |
| err = EEXIST; |
| else |
| err = ip_pool_create(&op); |
| break; |
| |
| case IPLT_HASH : |
| if (fr_findhtable(op.iplo_unit, op.iplo_name) != NULL) |
| err = EEXIST; |
| else |
| err = fr_newhtable(&op); |
| break; |
| |
| default : |
| err = EINVAL; |
| break; |
| } |
| |
| /* |
| * For anonymous pools, copy back the operation struct because in the |
| * case of success it will contain the new table's name. |
| */ |
| if ((err == 0) && ((op.iplo_arg & LOOKUP_ANON) != 0)) { |
| err = BCOPYOUT(&op, data, sizeof(op)); |
| if (err != 0) |
| err = EFAULT; |
| } |
| |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_deltable */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* Decodes ioctl request to remove a particular hash table or pool and */ |
| /* calls the relevant function to do the cleanup. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_deltable(data) |
| caddr_t data; |
| { |
| iplookupop_t op; |
| int err; |
| |
| err = BCOPYIN(data, &op, sizeof(op)); |
| if (err != 0) |
| return EFAULT; |
| |
| if (op.iplo_unit < 0 || op.iplo_unit > IPL_LOGMAX) |
| return EINVAL; |
| |
| op.iplo_name[sizeof(op.iplo_name) - 1] = '\0'; |
| |
| /* |
| * create a new pool - fail if one already exists with |
| * the same # |
| */ |
| switch (op.iplo_type) |
| { |
| case IPLT_POOL : |
| err = ip_pool_destroy(op.iplo_unit, op.iplo_name); |
| break; |
| |
| case IPLT_HASH : |
| err = fr_removehtable(op.iplo_unit, op.iplo_name); |
| break; |
| |
| default : |
| err = EINVAL; |
| break; |
| } |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_stats */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* Copy statistical information from inside the kernel back to user space. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_stats(data) |
| caddr_t data; |
| { |
| iplookupop_t op; |
| int err; |
| |
| err = BCOPYIN(data, &op, sizeof(op)); |
| if (err != 0) |
| return EFAULT; |
| |
| if (op.iplo_unit < 0 || op.iplo_unit > IPL_LOGMAX) |
| return EINVAL; |
| |
| switch (op.iplo_type) |
| { |
| case IPLT_POOL : |
| err = ip_pool_statistics(&op); |
| break; |
| |
| case IPLT_HASH : |
| err = fr_gethtablestat(&op); |
| break; |
| |
| default : |
| err = EINVAL; |
| break; |
| } |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_flush */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* A flush is called when we want to flush all the nodes from a particular */ |
| /* entry in the hash table/pool or want to remove all groups from those. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_flush(data) |
| caddr_t data; |
| { |
| int err, unit, num, type; |
| iplookupflush_t flush; |
| |
| err = BCOPYIN(data, &flush, sizeof(flush)); |
| if (err != 0) |
| return EFAULT; |
| |
| unit = flush.iplf_unit; |
| if ((unit < 0 || unit > IPL_LOGMAX) && (unit != IPLT_ALL)) |
| return EINVAL; |
| |
| flush.iplf_name[sizeof(flush.iplf_name) - 1] = '\0'; |
| |
| type = flush.iplf_type; |
| err = EINVAL; |
| num = 0; |
| |
| if (type == IPLT_POOL || type == IPLT_ALL) { |
| err = 0; |
| num = ip_pool_flush(&flush); |
| } |
| |
| if (type == IPLT_HASH || type == IPLT_ALL) { |
| err = 0; |
| num += fr_flushhtable(&flush); |
| } |
| |
| if (err == 0) { |
| flush.iplf_count = num; |
| err = BCOPYOUT(&flush, data, sizeof(flush)); |
| if (err != 0) |
| err = EFAULT; |
| } |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ip_lookup_delref */ |
| /* Returns: void */ |
| /* Parameters: type(I) - table type to operate on */ |
| /* ptr(I) - pointer to object to remove reference for */ |
| /* */ |
| /* This function organises calling the correct deref function for a given */ |
| /* type of object being passed into it. */ |
| /* ------------------------------------------------------------------------ */ |
| void ip_lookup_deref(type, ptr) |
| int type; |
| void *ptr; |
| { |
| if (ptr == NULL) |
| return; |
| |
| WRITE_ENTER(&ip_poolrw); |
| switch (type) |
| { |
| case IPLT_POOL : |
| ip_pool_deref(ptr); |
| break; |
| |
| case IPLT_HASH : |
| fr_derefhtable(ptr); |
| break; |
| } |
| RWLOCK_EXIT(&ip_poolrw); |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_iterate */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* uid(I) - uid of caller */ |
| /* ctx(I) - pointer to give the uid context */ |
| /* */ |
| /* Decodes ioctl request to step through either hash tables or pools. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_iterate(data, uid, ctx) |
| void *data; |
| int uid; |
| void *ctx; |
| { |
| ipflookupiter_t iter; |
| ipftoken_t *token; |
| int err; |
| SPL_INT(s); |
| |
| err = fr_inobj(data, &iter, IPFOBJ_LOOKUPITER); |
| if (err != 0) |
| return err; |
| |
| if (iter.ili_unit > IPL_LOGMAX) |
| return EINVAL; |
| |
| if (iter.ili_ival != IPFGENITER_LOOKUP) |
| return EINVAL; |
| |
| SPL_SCHED(s); |
| token = ipf_findtoken(iter.ili_key, uid, ctx); |
| if (token == NULL) { |
| RWLOCK_EXIT(&ipf_tokens); |
| SPL_X(s); |
| return ESRCH; |
| } |
| |
| switch (iter.ili_type) |
| { |
| case IPLT_POOL : |
| err = ip_pool_getnext(token, &iter); |
| break; |
| case IPLT_HASH : |
| err = fr_htable_getnext(token, &iter); |
| break; |
| default : |
| err = EINVAL; |
| break; |
| } |
| RWLOCK_EXIT(&ipf_tokens); |
| SPL_X(s); |
| |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_iterderef */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* */ |
| /* Decodes ioctl request to remove a particular hash table or pool and */ |
| /* calls the relevant function to do the cleanup. */ |
| /* ------------------------------------------------------------------------ */ |
| void ip_lookup_iterderef(type, data) |
| u_32_t type; |
| void *data; |
| { |
| iplookupiterkey_t key; |
| |
| key.ilik_key = type; |
| |
| if (key.ilik_unstr.ilik_ival != IPFGENITER_LOOKUP) |
| return; |
| |
| switch (key.ilik_unstr.ilik_type) |
| { |
| case IPLT_HASH : |
| fr_htable_iterderef((u_int)key.ilik_unstr.ilik_otype, |
| (int)key.ilik_unstr.ilik_unit, data); |
| break; |
| case IPLT_POOL : |
| ip_pool_iterderef((u_int)key.ilik_unstr.ilik_otype, |
| (int)key.ilik_unstr.ilik_unit, data); |
| break; |
| } |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: iplookup_deltok */ |
| /* Returns: int - 0 = success, else error */ |
| /* Parameters: data(I) - pointer to data from ioctl call */ |
| /* uid(I) - uid of caller */ |
| /* ctx(I) - pointer to give the uid context */ |
| /* */ |
| /* Deletes the token identified by the combination of (type,uid,ctx) */ |
| /* "key" is a combination of the table type, iterator type and the unit for */ |
| /* which the token was being used. */ |
| /* ------------------------------------------------------------------------ */ |
| static int iplookup_deltok(data, uid, ctx) |
| void *data; |
| int uid; |
| void *ctx; |
| { |
| int error, key; |
| SPL_INT(s); |
| |
| SPL_SCHED(s); |
| error = BCOPYIN(data, &key, sizeof(key)); |
| if (error == 0) |
| error = ipf_deltoken(key, uid, ctx); |
| SPL_X(s); |
| return error; |
| } |
| |
| |
| #else /* IPFILTER_LOOKUP */ |
| |
| /*ARGSUSED*/ |
| int ip_lookup_ioctl(data, cmd, mode, uid, ctx) |
| caddr_t data; |
| ioctlcmd_t cmd; |
| int mode, uid; |
| void *ctx; |
| { |
| return EIO; |
| } |
| #endif /* IPFILTER_LOOKUP */ |