/* * Copyright (C) 1993-2001, 2003 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #if !defined(lint) static const char sccsid[] = "@(#)ip_fil_solaris.c 1.7 07/22/06 (C) 1993-2000 Darren Reed"; static const char rcsid[] = "@(#)$Id: ip_fil_solaris.c,v 2.62.2.19 2005/07/13 21:40:46 darrenr Exp $"; #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "netinet/ip_compat.h" #ifdef USE_INET6 # include #endif #include "netinet/ip_fil.h" #include "netinet/ip_nat.h" #include "netinet/ip_frag.h" #include "netinet/ip_state.h" #include "netinet/ip_auth.h" #include "netinet/ip_proxy.h" #include "netinet/ipf_stack.h" #ifdef IPFILTER_LOOKUP # include "netinet/ip_lookup.h" #endif #include #include #include static int frzerostats __P((caddr_t, ipf_stack_t *)); static int fr_setipfloopback __P((int, ipf_stack_t *)); static int fr_enableipf __P((ipf_stack_t *, netstack_t *, int)); static int fr_send_ip __P((fr_info_t *fin, mblk_t *m, mblk_t **mp)); static int ipf_nic_event_v4 __P((hook_event_token_t, hook_data_t, netstack_t *)); static int ipf_nic_event_v6 __P((hook_event_token_t, hook_data_t, netstack_t *)); static int ipf_hook_out __P((hook_event_token_t, hook_data_t, netstack_t *)); static int ipf_hook_in __P((hook_event_token_t, hook_data_t, netstack_t *)); static int ipf_hook_loop_out __P((hook_event_token_t, hook_data_t, netstack_t *)); static int ipf_hook_loop_in __P((hook_event_token_t, hook_data_t, netstack_t *)); static int ipf_hook __P((hook_data_t, int, int, netstack_t *)); extern int ipf_geniter __P((ipftoken_t *, ipfgeniter_t *, ipf_stack_t *)); extern int ipf_frruleiter __P((void *, int, void *, ipf_stack_t *)); #if SOLARIS2 < 10 #if SOLARIS2 >= 7 u_int *ip_ttl_ptr = NULL; u_int *ip_mtudisc = NULL; # if SOLARIS2 >= 8 int *ip_forwarding = NULL; u_int *ip6_forwarding = NULL; # else u_int *ip_forwarding = NULL; # endif #else u_long *ip_ttl_ptr = NULL; u_long *ip_mtudisc = NULL; u_long *ip_forwarding = NULL; #endif #endif /* ------------------------------------------------------------------------ */ /* Function: ipldetach */ /* Returns: int - 0 == success, else error. */ /* Parameters: Nil */ /* */ /* This function is responsible for undoing anything that might have been */ /* done in a call to iplattach(). It must be able to clean up from a call */ /* to iplattach() that did not succeed. Why might that happen? Someone */ /* configures a table to be so large that we cannot allocate enough memory */ /* for it. */ /* ------------------------------------------------------------------------ */ int ipldetach(ifs) ipf_stack_t *ifs; { ASSERT(rw_read_locked(&ifs->ifs_ipf_global.ipf_lk) == 0); #if SOLARIS2 < 10 if (ifs->ifs_fr_control_forwarding & 2) { if (ip_forwarding != NULL) *ip_forwarding = 0; #if SOLARIS2 >= 8 if (ip6_forwarding != NULL) *ip6_forwarding = 0; #endif } #endif /* * This lock needs to be dropped around the net_unregister_hook calls * because we can deadlock here with: * W(ipf_global)->R(hook_family)->W(hei_lock) (this code path) vs * R(hook_family)->R(hei_lock)->R(ipf_global) (active hook running) */ RWLOCK_EXIT(&ifs->ifs_ipf_global); /* * Remove IPv6 Hooks */ if (ifs->ifs_ipf_ipv6 != NULL) { if (ifs->ifs_hook6_physical_in) { ifs->ifs_hook6_physical_in = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_PHYSICAL_IN, &ifs->ifs_ipfhook_in) != 0); } if (ifs->ifs_hook6_physical_out) { ifs->ifs_hook6_physical_out = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_PHYSICAL_OUT, &ifs->ifs_ipfhook_out) != 0); } if (ifs->ifs_hook6_nic_events) { ifs->ifs_hook6_nic_events = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_NIC_EVENTS, &ifs->ifs_ipfhook_nicevents) != 0); } if (ifs->ifs_hook6_loopback_in) { ifs->ifs_hook6_loopback_in = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) != 0); } if (ifs->ifs_hook6_loopback_out) { ifs->ifs_hook6_loopback_out = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) != 0); } if (net_release(ifs->ifs_ipf_ipv6) != 0) goto detach_failed; ifs->ifs_ipf_ipv6 = NULL; } /* * Remove IPv4 Hooks */ if (ifs->ifs_ipf_ipv4 != NULL) { if (ifs->ifs_hook4_physical_in) { ifs->ifs_hook4_physical_in = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_PHYSICAL_IN, &ifs->ifs_ipfhook_in) != 0); } if (ifs->ifs_hook4_physical_out) { ifs->ifs_hook4_physical_out = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_PHYSICAL_OUT, &ifs->ifs_ipfhook_out) != 0); } if (ifs->ifs_hook4_nic_events) { ifs->ifs_hook4_nic_events = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_NIC_EVENTS, &ifs->ifs_ipfhook_nicevents) != 0); } if (ifs->ifs_hook4_loopback_in) { ifs->ifs_hook4_loopback_in = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) != 0); } if (ifs->ifs_hook4_loopback_out) { ifs->ifs_hook4_loopback_out = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) != 0); } if (net_release(ifs->ifs_ipf_ipv4) != 0) goto detach_failed; ifs->ifs_ipf_ipv4 = NULL; } #ifdef IPFDEBUG cmn_err(CE_CONT, "ipldetach()\n"); #endif WRITE_ENTER(&ifs->ifs_ipf_global); fr_deinitialise(ifs); (void) frflush(IPL_LOGIPF, 0, FR_INQUE|FR_OUTQUE|FR_INACTIVE, ifs); (void) frflush(IPL_LOGIPF, 0, FR_INQUE|FR_OUTQUE, ifs); if (ifs->ifs_ipf_locks_done == 1) { MUTEX_DESTROY(&ifs->ifs_ipf_timeoutlock); MUTEX_DESTROY(&ifs->ifs_ipf_rw); RW_DESTROY(&ifs->ifs_ipf_tokens); RW_DESTROY(&ifs->ifs_ipf_ipidfrag); ifs->ifs_ipf_locks_done = 0; } if (ifs->ifs_hook4_physical_in || ifs->ifs_hook4_physical_out || ifs->ifs_hook4_nic_events || ifs->ifs_hook4_loopback_in || ifs->ifs_hook4_loopback_out || ifs->ifs_hook6_nic_events || ifs->ifs_hook6_physical_in || ifs->ifs_hook6_physical_out || ifs->ifs_hook6_loopback_in || ifs->ifs_hook6_loopback_out) return -1; return 0; detach_failed: WRITE_ENTER(&ifs->ifs_ipf_global); return -1; } int iplattach(ifs, ns) ipf_stack_t *ifs; netstack_t *ns; { #if SOLARIS2 < 10 int i; #endif #ifdef IPFDEBUG cmn_err(CE_CONT, "iplattach()\n"); #endif ASSERT(rw_read_locked(&ifs->ifs_ipf_global.ipf_lk) == 0); ifs->ifs_fr_flags = IPF_LOGGING; #ifdef _KERNEL ifs->ifs_fr_update_ipid = 0; #else ifs->ifs_fr_update_ipid = 1; #endif ifs->ifs_fr_minttl = 4; ifs->ifs_fr_icmpminfragmtu = 68; #if defined(IPFILTER_DEFAULT_BLOCK) ifs->ifs_fr_pass = FR_BLOCK|FR_NOMATCH; #else ifs->ifs_fr_pass = (IPF_DEFAULT_PASS)|FR_NOMATCH; #endif bzero((char *)ifs->ifs_frcache, sizeof(ifs->ifs_frcache)); MUTEX_INIT(&ifs->ifs_ipf_rw, "ipf rw mutex"); MUTEX_INIT(&ifs->ifs_ipf_timeoutlock, "ipf timeout lock mutex"); RWLOCK_INIT(&ifs->ifs_ipf_ipidfrag, "ipf IP NAT-Frag rwlock"); RWLOCK_INIT(&ifs->ifs_ipf_tokens, "ipf token rwlock"); ifs->ifs_ipf_locks_done = 1; if (fr_initialise(ifs) < 0) return -1; HOOK_INIT(&ifs->ifs_ipfhook_nicevents, ipf_nic_event_v4, "ipfilter_hook_nicevents"); HOOK_INIT(&ifs->ifs_ipfhook_in, ipf_hook_in, "ipfilter_hook_in"); HOOK_INIT(&ifs->ifs_ipfhook_out, ipf_hook_out, "ipfilter_hook_out"); HOOK_INIT(&ifs->ifs_ipfhook_loop_in, ipf_hook_in, "ipfilter_hook_loop_in"); HOOK_INIT(&ifs->ifs_ipfhook_loop_out, ipf_hook_out, "ipfilter_hook_loop_out"); /* * If we hold this lock over all of the net_register_hook calls, we * can cause a deadlock to occur with the following lock ordering: * W(ipf_global)->R(hook_family)->W(hei_lock) (this code path) vs * R(hook_family)->R(hei_lock)->R(ipf_global) (packet path) */ RWLOCK_EXIT(&ifs->ifs_ipf_global); /* * Add IPv4 hooks */ ifs->ifs_ipf_ipv4 = net_lookup_impl(NHF_INET, ns); if (ifs->ifs_ipf_ipv4 == NULL) goto hookup_failed; ifs->ifs_hook4_nic_events = (net_register_hook(ifs->ifs_ipf_ipv4, NH_NIC_EVENTS, &ifs->ifs_ipfhook_nicevents) == 0); if (!ifs->ifs_hook4_nic_events) goto hookup_failed; ifs->ifs_hook4_physical_in = (net_register_hook(ifs->ifs_ipf_ipv4, NH_PHYSICAL_IN, &ifs->ifs_ipfhook_in) == 0); if (!ifs->ifs_hook4_physical_in) goto hookup_failed; ifs->ifs_hook4_physical_out = (net_register_hook(ifs->ifs_ipf_ipv4, NH_PHYSICAL_OUT, &ifs->ifs_ipfhook_out) == 0); if (!ifs->ifs_hook4_physical_out) goto hookup_failed; if (ifs->ifs_ipf_loopback) { ifs->ifs_hook4_loopback_in = (net_register_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) == 0); if (!ifs->ifs_hook4_loopback_in) goto hookup_failed; ifs->ifs_hook4_loopback_out = (net_register_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) == 0); if (!ifs->ifs_hook4_loopback_out) goto hookup_failed; } /* * Add IPv6 hooks */ ifs->ifs_ipf_ipv6 = net_lookup_impl(NHF_INET6, ns); if (ifs->ifs_ipf_ipv6 == NULL) goto hookup_failed; HOOK_INIT(&ifs->ifs_ipfhook_nicevents, ipf_nic_event_v6, "ipfilter_hook_nicevents"); ifs->ifs_hook6_nic_events = (net_register_hook(ifs->ifs_ipf_ipv6, NH_NIC_EVENTS, &ifs->ifs_ipfhook_nicevents) == 0); if (!ifs->ifs_hook6_nic_events) goto hookup_failed; ifs->ifs_hook6_physical_in = (net_register_hook(ifs->ifs_ipf_ipv6, NH_PHYSICAL_IN, &ifs->ifs_ipfhook_in) == 0); if (!ifs->ifs_hook6_physical_in) goto hookup_failed; ifs->ifs_hook6_physical_out = (net_register_hook(ifs->ifs_ipf_ipv6, NH_PHYSICAL_OUT, &ifs->ifs_ipfhook_out) == 0); if (!ifs->ifs_hook6_physical_out) goto hookup_failed; if (ifs->ifs_ipf_loopback) { ifs->ifs_hook6_loopback_in = (net_register_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) == 0); if (!ifs->ifs_hook6_loopback_in) goto hookup_failed; ifs->ifs_hook6_loopback_out = (net_register_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) == 0); if (!ifs->ifs_hook6_loopback_out) goto hookup_failed; } /* * Reacquire ipf_global, now it is safe. */ WRITE_ENTER(&ifs->ifs_ipf_global); /* Do not use private interface ip_params_arr[] in Solaris 10 */ #if SOLARIS2 < 10 #if SOLARIS2 >= 8 ip_forwarding = &ip_g_forward; #endif /* * XXX - There is no terminator for this array, so it is not possible * to tell if what we are looking for is missing and go off the end * of the array. */ #if SOLARIS2 <= 8 for (i = 0; ; i++) { if (!strcmp(ip_param_arr[i].ip_param_name, "ip_def_ttl")) { ip_ttl_ptr = &ip_param_arr[i].ip_param_value; } else if (!strcmp(ip_param_arr[i].ip_param_name, "ip_path_mtu_discovery")) { ip_mtudisc = &ip_param_arr[i].ip_param_value; } #if SOLARIS2 < 8 else if (!strcmp(ip_param_arr[i].ip_param_name, "ip_forwarding")) { ip_forwarding = &ip_param_arr[i].ip_param_value; } #else else if (!strcmp(ip_param_arr[i].ip_param_name, "ip6_forwarding")) { ip6_forwarding = &ip_param_arr[i].ip_param_value; } #endif if (ip_mtudisc != NULL && ip_ttl_ptr != NULL && #if SOLARIS2 >= 8 ip6_forwarding != NULL && #endif ip_forwarding != NULL) break; } #endif if (ifs->ifs_fr_control_forwarding & 1) { if (ip_forwarding != NULL) *ip_forwarding = 1; #if SOLARIS2 >= 8 if (ip6_forwarding != NULL) *ip6_forwarding = 1; #endif } #endif return 0; hookup_failed: WRITE_ENTER(&ifs->ifs_ipf_global); return -1; } static int fr_setipfloopback(set, ifs) int set; ipf_stack_t *ifs; { if (ifs->ifs_ipf_ipv4 == NULL || ifs->ifs_ipf_ipv6 == NULL) return EFAULT; if (set && !ifs->ifs_ipf_loopback) { ifs->ifs_ipf_loopback = 1; ifs->ifs_hook4_loopback_in = (net_register_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) == 0); if (!ifs->ifs_hook4_loopback_in) return EINVAL; ifs->ifs_hook4_loopback_out = (net_register_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) == 0); if (!ifs->ifs_hook4_loopback_out) return EINVAL; ifs->ifs_hook6_loopback_in = (net_register_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) == 0); if (!ifs->ifs_hook6_loopback_in) return EINVAL; ifs->ifs_hook6_loopback_out = (net_register_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) == 0); if (!ifs->ifs_hook6_loopback_out) return EINVAL; } else if (!set && ifs->ifs_ipf_loopback) { ifs->ifs_ipf_loopback = 0; ifs->ifs_hook4_loopback_in = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) != 0); if (ifs->ifs_hook4_loopback_in) return EBUSY; ifs->ifs_hook4_loopback_out = (net_unregister_hook(ifs->ifs_ipf_ipv4, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) != 0); if (ifs->ifs_hook4_loopback_out) return EBUSY; ifs->ifs_hook6_loopback_in = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_IN, &ifs->ifs_ipfhook_loop_in) != 0); if (ifs->ifs_hook6_loopback_in) return EBUSY; ifs->ifs_hook6_loopback_out = (net_unregister_hook(ifs->ifs_ipf_ipv6, NH_LOOPBACK_OUT, &ifs->ifs_ipfhook_loop_out) != 0); if (ifs->ifs_hook6_loopback_out) return EBUSY; } return 0; } /* * Filter ioctl interface. */ /*ARGSUSED*/ int iplioctl(dev, cmd, data, mode, cp, rp) dev_t dev; int cmd; #if SOLARIS2 >= 7 intptr_t data; #else int *data; #endif int mode; cred_t *cp; int *rp; { int error = 0, tmp; friostat_t fio; minor_t unit; u_int enable; netstack_t *ns; ipf_stack_t *ifs; #ifdef IPFDEBUG cmn_err(CE_CONT, "iplioctl(%x,%x,%x,%d,%x,%d)\n", dev, cmd, data, mode, cp, rp); #endif unit = getminor(dev); if (IPL_LOGMAX < unit) return ENXIO; ns = netstack_find_by_cred(cp); ASSERT(ns != NULL); ifs = ns->netstack_ipf; ASSERT(ifs != NULL); if (ifs->ifs_fr_running <= 0) { if (unit != IPL_LOGIPF) { netstack_rele(ifs->ifs_netstack); return EIO; } if (cmd != SIOCIPFGETNEXT && cmd != SIOCIPFGET && cmd != SIOCIPFSET && cmd != SIOCFRENB && cmd != SIOCGETFS && cmd != SIOCGETFF) { netstack_rele(ifs->ifs_netstack); return EIO; } } READ_ENTER(&ifs->ifs_ipf_global); error = fr_ioctlswitch(unit, (caddr_t)data, cmd, mode, cp->cr_uid, curproc, ifs); if (error != -1) { RWLOCK_EXIT(&ifs->ifs_ipf_global); netstack_rele(ifs->ifs_netstack); return error; } error = 0; switch (cmd) { case SIOCFRENB : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&enable, sizeof(enable)); if (error != 0) { error = EFAULT; break; } RWLOCK_EXIT(&ifs->ifs_ipf_global); WRITE_ENTER(&ifs->ifs_ipf_global); error = fr_enableipf(ifs, ns, enable); } break; case SIOCIPFSET : if (!(mode & FWRITE)) { error = EPERM; break; } /* FALLTHRU */ case SIOCIPFGETNEXT : case SIOCIPFGET : error = fr_ipftune(cmd, (void *)data, ifs); break; case SIOCSETFF : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&ifs->ifs_fr_flags, sizeof(ifs->ifs_fr_flags)); if (error != 0) error = EFAULT; } break; case SIOCIPFLP : error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (error != 0) error = EFAULT; else error = fr_setipfloopback(tmp, ifs); break; case SIOCGETFF : error = COPYOUT((caddr_t)&ifs->ifs_fr_flags, (caddr_t)data, sizeof(ifs->ifs_fr_flags)); if (error != 0) error = EFAULT; break; case SIOCFUNCL : error = fr_resolvefunc((void *)data); break; case SIOCINAFR : case SIOCRMAFR : case SIOCADAFR : case SIOCZRLST : if (!(mode & FWRITE)) error = EPERM; else error = frrequest(unit, cmd, (caddr_t)data, ifs->ifs_fr_active, 1, ifs); break; case SIOCINIFR : case SIOCRMIFR : case SIOCADIFR : if (!(mode & FWRITE)) error = EPERM; else error = frrequest(unit, cmd, (caddr_t)data, 1 - ifs->ifs_fr_active, 1, ifs); break; case SIOCSWAPA : if (!(mode & FWRITE)) error = EPERM; else { WRITE_ENTER(&ifs->ifs_ipf_mutex); /* Clear one fourth of the table */ bzero((char *)&ifs->ifs_frcache, sizeof (ifs->ifs_frcache[0]) * 2); error = COPYOUT((caddr_t)&ifs->ifs_fr_active, (caddr_t)data, sizeof(ifs->ifs_fr_active)); if (error != 0) error = EFAULT; else ifs->ifs_fr_active = 1 - ifs->ifs_fr_active; RWLOCK_EXIT(&ifs->ifs_ipf_mutex); } break; case SIOCGETFS : fr_getstat(&fio, ifs); error = fr_outobj((void *)data, &fio, IPFOBJ_IPFSTAT); break; case SIOCFRZST : if (!(mode & FWRITE)) error = EPERM; else error = fr_zerostats((caddr_t)data, ifs); break; case SIOCIPFFL : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (!error) { tmp = frflush(unit, 4, tmp, ifs); error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error != 0) error = EFAULT; } else error = EFAULT; } break; #ifdef USE_INET6 case SIOCIPFL6 : if (!(mode & FWRITE)) error = EPERM; else { error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (!error) { tmp = frflush(unit, 6, tmp, ifs); error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error != 0) error = EFAULT; } else error = EFAULT; } break; #endif case SIOCSTLCK : error = COPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); if (error == 0) { ifs->ifs_fr_state_lock = tmp; ifs->ifs_fr_nat_lock = tmp; ifs->ifs_fr_frag_lock = tmp; ifs->ifs_fr_auth_lock = tmp; } else error = EFAULT; break; #ifdef IPFILTER_LOG case SIOCIPFFB : if (!(mode & FWRITE)) error = EPERM; else { tmp = ipflog_clear(unit, ifs); error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error) error = EFAULT; } break; #endif /* IPFILTER_LOG */ case SIOCFRSYN : if (!(mode & FWRITE)) error = EPERM; else { RWLOCK_EXIT(&ifs->ifs_ipf_global); WRITE_ENTER(&ifs->ifs_ipf_global); frsync(IPFSYNC_RESYNC, 0, NULL, NULL, ifs); fr_natifpsync(IPFSYNC_RESYNC, NULL, NULL, ifs); fr_nataddrsync(NULL, NULL, ifs); fr_statesync(IPFSYNC_RESYNC, 0, NULL, NULL, ifs); error = 0; } break; case SIOCGFRST : error = fr_outobj((void *)data, fr_fragstats(ifs), IPFOBJ_FRAGSTAT); break; case FIONREAD : #ifdef IPFILTER_LOG tmp = (int)ifs->ifs_iplused[IPL_LOGIPF]; error = COPYOUT((caddr_t)&tmp, (caddr_t)data, sizeof(tmp)); if (error != 0) error = EFAULT; #endif break; case SIOCIPFITER : error = ipf_frruleiter((caddr_t)data, cp->cr_uid, curproc, ifs); break; case SIOCGENITER : error = ipf_genericiter((caddr_t)data, cp->cr_uid, curproc, ifs); break; case SIOCIPFDELTOK : (void)BCOPYIN((caddr_t)data, (caddr_t)&tmp, sizeof(tmp)); error = ipf_deltoken(tmp, cp->cr_uid, curproc, ifs); break; default : cmn_err(CE_NOTE, "Unknown: cmd 0x%x data %p", cmd, (void *)data); error = EINVAL; break; } RWLOCK_EXIT(&ifs->ifs_ipf_global); netstack_rele(ifs->ifs_netstack); return error; } static int fr_enableipf(ifs, ns, enable) ipf_stack_t *ifs; netstack_t *ns; int enable; { int error; if (!enable) { error = ipldetach(ifs); if (error == 0) ifs->ifs_fr_running = -1; return (error); } if (ifs->ifs_fr_running > 0) error = 0; error = iplattach(ifs, ns); if (error == 0) { if (ifs->ifs_fr_timer_id == NULL) { int hz = drv_usectohz(500000); ifs->ifs_fr_timer_id = timeout(fr_slowtimer, (void *)ifs, hz); } ifs->ifs_fr_running = 1; } else { (void) ipldetach(ifs); } return (error); } phy_if_t get_unit(name, v, ifs) char *name; int v; ipf_stack_t *ifs; { net_data_t nif; if (v == 4) nif = ifs->ifs_ipf_ipv4; else if (v == 6) nif = ifs->ifs_ipf_ipv6; else return 0; nif->netd_netstack = ifs->ifs_netstack; return (net_phylookup(nif, name)); } /* * routines below for saving IP headers to buffer */ /*ARGSUSED*/ int iplopen(devp, flags, otype, cred) dev_t *devp; int flags, otype; cred_t *cred; { minor_t min = getminor(*devp); #ifdef IPFDEBUG cmn_err(CE_CONT, "iplopen(%x,%x,%x,%x)\n", devp, flags, otype, cred); #endif if (!(otype & OTYP_CHR)) return ENXIO; min = (IPL_LOGMAX < min) ? ENXIO : 0; return min; } /*ARGSUSED*/ int iplclose(dev, flags, otype, cred) dev_t dev; int flags, otype; cred_t *cred; { minor_t min = getminor(dev); #ifdef IPFDEBUG cmn_err(CE_CONT, "iplclose(%x,%x,%x,%x)\n", dev, flags, otype, cred); #endif min = (IPL_LOGMAX < min) ? ENXIO : 0; return min; } #ifdef IPFILTER_LOG /* * iplread/ipllog * both of these must operate with at least splnet() lest they be * called during packet processing and cause an inconsistancy to appear in * the filter lists. */ /*ARGSUSED*/ int iplread(dev, uio, cp) dev_t dev; register struct uio *uio; cred_t *cp; { netstack_t *ns; ipf_stack_t *ifs; int ret; ns = netstack_find_by_cred(cp); ASSERT(ns != NULL); ifs = ns->netstack_ipf; ASSERT(ifs != NULL); # ifdef IPFDEBUG cmn_err(CE_CONT, "iplread(%x,%x,%x)\n", dev, uio, cp); # endif if (ifs->ifs_fr_running < 1) { netstack_rele(ifs->ifs_netstack); return EIO; } # ifdef IPFILTER_SYNC if (getminor(dev) == IPL_LOGSYNC) { netstack_rele(ifs->ifs_netstack); return ipfsync_read(uio); } # endif ret = ipflog_read(getminor(dev), uio, ifs); netstack_rele(ifs->ifs_netstack); return ret; } #endif /* IPFILTER_LOG */ /* * iplread/ipllog * both of these must operate with at least splnet() lest they be * called during packet processing and cause an inconsistancy to appear in * the filter lists. */ int iplwrite(dev, uio, cp) dev_t dev; register struct uio *uio; cred_t *cp; { netstack_t *ns; ipf_stack_t *ifs; ns = netstack_find_by_cred(cp); ASSERT(ns != NULL); ifs = ns->netstack_ipf; ASSERT(ifs != NULL); #ifdef IPFDEBUG cmn_err(CE_CONT, "iplwrite(%x,%x,%x)\n", dev, uio, cp); #endif if (ifs->ifs_fr_running < 1) { netstack_rele(ifs->ifs_netstack); return EIO; } #ifdef IPFILTER_SYNC if (getminor(dev) == IPL_LOGSYNC) return ipfsync_write(uio); #endif /* IPFILTER_SYNC */ dev = dev; /* LINT */ uio = uio; /* LINT */ cp = cp; /* LINT */ netstack_rele(ifs->ifs_netstack); return ENXIO; } /* * fr_send_reset - this could conceivably be a call to tcp_respond(), but that * requires a large amount of setting up and isn't any more efficient. */ int fr_send_reset(fin) fr_info_t *fin; { tcphdr_t *tcp, *tcp2; int tlen, hlen; mblk_t *m; #ifdef USE_INET6 ip6_t *ip6; #endif ip_t *ip; tcp = fin->fin_dp; if (tcp->th_flags & TH_RST) return -1; #ifndef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) return -1; #endif tlen = (tcp->th_flags & (TH_SYN|TH_FIN)) ? 1 : 0; #ifdef USE_INET6 if (fin->fin_v == 6) hlen = sizeof(ip6_t); else #endif hlen = sizeof(ip_t); hlen += sizeof(*tcp2); if ((m = (mblk_t *)allocb(hlen + 64, BPRI_HI)) == NULL) return -1; m->b_rptr += 64; MTYPE(m) = M_DATA; m->b_wptr = m->b_rptr + hlen; ip = (ip_t *)m->b_rptr; bzero((char *)ip, hlen); tcp2 = (struct tcphdr *)(m->b_rptr + hlen - sizeof(*tcp2)); tcp2->th_dport = tcp->th_sport; tcp2->th_sport = tcp->th_dport; if (tcp->th_flags & TH_ACK) { tcp2->th_seq = tcp->th_ack; tcp2->th_flags = TH_RST; } else { tcp2->th_ack = ntohl(tcp->th_seq); tcp2->th_ack += tlen; tcp2->th_ack = htonl(tcp2->th_ack); tcp2->th_flags = TH_RST|TH_ACK; } tcp2->th_off = sizeof(struct tcphdr) >> 2; ip->ip_v = fin->fin_v; #ifdef USE_INET6 if (fin->fin_v == 6) { ip6 = (ip6_t *)m->b_rptr; ip6->ip6_flow = ((ip6_t *)fin->fin_ip)->ip6_flow; ip6->ip6_src = fin->fin_dst6; ip6->ip6_dst = fin->fin_src6; ip6->ip6_plen = htons(sizeof(*tcp)); ip6->ip6_nxt = IPPROTO_TCP; tcp2->th_sum = fr_cksum(m, (ip_t *)ip6, IPPROTO_TCP, tcp2); } else #endif { ip->ip_src.s_addr = fin->fin_daddr; ip->ip_dst.s_addr = fin->fin_saddr; ip->ip_id = fr_nextipid(fin); ip->ip_hl = sizeof(*ip) >> 2; ip->ip_p = IPPROTO_TCP; ip->ip_len = sizeof(*ip) + sizeof(*tcp); ip->ip_tos = fin->fin_ip->ip_tos; tcp2->th_sum = fr_cksum(m, ip, IPPROTO_TCP, tcp2); } return fr_send_ip(fin, m, &m); } /* * Function: fr_send_ip * Returns: 0: success * -1: failed * Parameters: * fin: packet information * m: the message block where ip head starts * * Send a new packet through the IP stack. * * For IPv4 packets, ip_len must be in host byte order, and ip_v, * ip_ttl, ip_off, and ip_sum are ignored (filled in by this * function). * * For IPv6 packets, ip6_flow, ip6_vfc, and ip6_hlim are filled * in by this function. * * All other portions of the packet must be in on-the-wire format. */ /*ARGSUSED*/ static int fr_send_ip(fin, m, mpp) fr_info_t *fin; mblk_t *m, **mpp; { qpktinfo_t qpi, *qpip; fr_info_t fnew; ip_t *ip; int i, hlen; ipf_stack_t *ifs = fin->fin_ifs; ip = (ip_t *)m->b_rptr; bzero((char *)&fnew, sizeof(fnew)); #ifdef USE_INET6 if (fin->fin_v == 6) { ip6_t *ip6; ip6 = (ip6_t *)ip; ip6->ip6_vfc = 0x60; ip6->ip6_hlim = 127; fnew.fin_v = 6; hlen = sizeof(*ip6); fnew.fin_plen = ntohs(ip6->ip6_plen) + hlen; } else #endif { fnew.fin_v = 4; #if SOLARIS2 >= 10 ip->ip_ttl = 255; if (net_getpmtuenabled(ifs->ifs_ipf_ipv4) == 1) ip->ip_off = htons(IP_DF); #else if (ip_ttl_ptr != NULL) ip->ip_ttl = (u_char)(*ip_ttl_ptr); else ip->ip_ttl = 63; if (ip_mtudisc != NULL) ip->ip_off = htons(*ip_mtudisc ? IP_DF : 0); else ip->ip_off = htons(IP_DF); #endif /* * The dance with byte order and ip_len/ip_off is because in * fr_fastroute, it expects them to be in host byte order but * ipf_cksum expects them to be in network byte order. */ ip->ip_len = htons(ip->ip_len); ip->ip_sum = ipf_cksum((u_short *)ip, sizeof(*ip)); ip->ip_len = ntohs(ip->ip_len); ip->ip_off = ntohs(ip->ip_off); hlen = sizeof(*ip); fnew.fin_plen = ip->ip_len; } qpip = fin->fin_qpi; qpi.qpi_off = 0; qpi.qpi_ill = qpip->qpi_ill; qpi.qpi_m = m; qpi.qpi_data = ip; fnew.fin_qpi = &qpi; fnew.fin_ifp = fin->fin_ifp; fnew.fin_flx = FI_NOCKSUM; fnew.fin_m = m; fnew.fin_ip = ip; fnew.fin_mp = mpp; fnew.fin_hlen = hlen; fnew.fin_dp = (char *)ip + hlen; fnew.fin_ifs = fin->fin_ifs; (void) fr_makefrip(hlen, ip, &fnew); i = fr_fastroute(m, mpp, &fnew, NULL); return i; } int fr_send_icmp_err(type, fin, dst) int type; fr_info_t *fin; int dst; { struct in_addr dst4; struct icmp *icmp; qpktinfo_t *qpi; int hlen, code; phy_if_t phy; u_short sz; #ifdef USE_INET6 mblk_t *mb; #endif mblk_t *m; #ifdef USE_INET6 ip6_t *ip6; #endif ip_t *ip; ipf_stack_t *ifs = fin->fin_ifs; if ((type < 0) || (type > ICMP_MAXTYPE)) return -1; code = fin->fin_icode; #ifdef USE_INET6 if ((code < 0) || (code > sizeof(icmptoicmp6unreach)/sizeof(int))) return -1; #endif #ifndef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) return -1; #endif qpi = fin->fin_qpi; #ifdef USE_INET6 mb = fin->fin_qfm; if (fin->fin_v == 6) { sz = sizeof(ip6_t); sz += MIN(mb->b_wptr - mb->b_rptr, 512); hlen = sizeof(ip6_t); type = icmptoicmp6types[type]; if (type == ICMP6_DST_UNREACH) code = icmptoicmp6unreach[code]; } else #endif { if ((fin->fin_p == IPPROTO_ICMP) && !(fin->fin_flx & FI_SHORT)) switch (ntohs(fin->fin_data[0]) >> 8) { case ICMP_ECHO : case ICMP_TSTAMP : case ICMP_IREQ : case ICMP_MASKREQ : break; default : return 0; } sz = sizeof(ip_t) * 2; sz += 8; /* 64 bits of data */ hlen = sizeof(ip_t); } sz += offsetof(struct icmp, icmp_ip); if ((m = (mblk_t *)allocb((size_t)sz + 64, BPRI_HI)) == NULL) return -1; MTYPE(m) = M_DATA; m->b_rptr += 64; m->b_wptr = m->b_rptr + sz; bzero((char *)m->b_rptr, (size_t)sz); ip = (ip_t *)m->b_rptr; ip->ip_v = fin->fin_v; icmp = (struct icmp *)(m->b_rptr + hlen); icmp->icmp_type = type & 0xff; icmp->icmp_code = code & 0xff; phy = (phy_if_t)qpi->qpi_ill; if (type == ICMP_UNREACH && (phy != 0) && fin->fin_icode == ICMP_UNREACH_NEEDFRAG) icmp->icmp_nextmtu = net_getmtu(ifs->ifs_ipf_ipv4, phy,0 ); #ifdef USE_INET6 if (fin->fin_v == 6) { struct in6_addr dst6; int csz; if (dst == 0) { ipf_stack_t *ifs = fin->fin_ifs; if (fr_ifpaddr(6, FRI_NORMAL, (void *)phy, (void *)&dst6, NULL, ifs) == -1) { FREE_MB_T(m); return -1; } } else dst6 = fin->fin_dst6; csz = sz; sz -= sizeof(ip6_t); ip6 = (ip6_t *)m->b_rptr; ip6->ip6_flow = ((ip6_t *)fin->fin_ip)->ip6_flow; ip6->ip6_plen = htons((u_short)sz); ip6->ip6_nxt = IPPROTO_ICMPV6; ip6->ip6_src = dst6; ip6->ip6_dst = fin->fin_src6; sz -= offsetof(struct icmp, icmp_ip); bcopy((char *)mb->b_rptr, (char *)&icmp->icmp_ip, sz); icmp->icmp_cksum = csz - sizeof(ip6_t); } else #endif { ip->ip_hl = sizeof(*ip) >> 2; ip->ip_p = IPPROTO_ICMP; ip->ip_id = fin->fin_ip->ip_id; ip->ip_tos = fin->fin_ip->ip_tos; ip->ip_len = (u_short)sz; if (dst == 0) { ipf_stack_t *ifs = fin->fin_ifs; if (fr_ifpaddr(4, FRI_NORMAL, (void *)phy, (void *)&dst4, NULL, ifs) == -1) { FREE_MB_T(m); return -1; } } else { dst4 = fin->fin_dst; } ip->ip_src = dst4; ip->ip_dst = fin->fin_src; bcopy((char *)fin->fin_ip, (char *)&icmp->icmp_ip, sizeof(*fin->fin_ip)); bcopy((char *)fin->fin_ip + fin->fin_hlen, (char *)&icmp->icmp_ip + sizeof(*fin->fin_ip), 8); icmp->icmp_ip.ip_len = htons(icmp->icmp_ip.ip_len); icmp->icmp_ip.ip_off = htons(icmp->icmp_ip.ip_off); icmp->icmp_cksum = ipf_cksum((u_short *)icmp, sz - sizeof(ip_t)); } /* * Need to exit out of these so we don't recursively call rw_enter * from fr_qout. */ return fr_send_ip(fin, m, &m); } #include #include #ifndef _KERNEL #include #endif #define NULLADDR_RATE_LIMIT 10 /* 10 seconds */ /* * Print out warning message at rate-limited speed. */ static void rate_limit_message(ipf_stack_t *ifs, int rate, const char *message, ...) { static time_t last_time = 0; time_t now; va_list args; char msg_buf[256]; int need_printed = 0; now = ddi_get_time(); /* make sure, no multiple entries */ ASSERT(MUTEX_NOT_HELD(&(ifs->ifs_ipf_rw.ipf_lk))); MUTEX_ENTER(&ifs->ifs_ipf_rw); if (now - last_time >= rate) { need_printed = 1; last_time = now; } MUTEX_EXIT(&ifs->ifs_ipf_rw); if (need_printed) { va_start(args, message); (void)vsnprintf(msg_buf, 255, message, args); va_end(args); #ifdef _KERNEL cmn_err(CE_WARN, msg_buf); #else fprintf(std_err, msg_buf); #endif } } /* * return the first IP Address associated with an interface */ /*ARGSUSED*/ int fr_ifpaddr(v, atype, ifptr, inp, inpmask, ifs) int v, atype; void *ifptr; struct in_addr *inp, *inpmask; ipf_stack_t *ifs; { struct sockaddr_in6 v6addr[2]; struct sockaddr_in v4addr[2]; net_ifaddr_t type[2]; net_data_t net_data; phy_if_t phyif; void *array; switch (v) { case 4: net_data = ifs->ifs_ipf_ipv4; array = v4addr; break; case 6: net_data = ifs->ifs_ipf_ipv6; array = v6addr; break; default: net_data = NULL; break; } if (net_data == NULL) return -1; phyif = (phy_if_t)ifptr; switch (atype) { case FRI_PEERADDR : type[0] = NA_PEER; break; case FRI_BROADCAST : type[0] = NA_BROADCAST; break; default : type[0] = NA_ADDRESS; break; } type[1] = NA_NETMASK; if (net_getlifaddr(net_data, phyif, 0, 2, type, array) < 0) return -1; if (v == 6) { return fr_ifpfillv6addr(atype, &v6addr[0], &v6addr[1], inp, inpmask); } return fr_ifpfillv4addr(atype, &v4addr[0], &v4addr[1], inp, inpmask); } u_32_t fr_newisn(fin) fr_info_t *fin; { static int iss_seq_off = 0; u_char hash[16]; u_32_t newiss; MD5_CTX ctx; ipf_stack_t *ifs = fin->fin_ifs; /* * Compute the base value of the ISS. It is a hash * of (saddr, sport, daddr, dport, secret). */ MD5Init(&ctx); MD5Update(&ctx, (u_char *) &fin->fin_fi.fi_src, sizeof(fin->fin_fi.fi_src)); MD5Update(&ctx, (u_char *) &fin->fin_fi.fi_dst, sizeof(fin->fin_fi.fi_dst)); MD5Update(&ctx, (u_char *) &fin->fin_dat, sizeof(fin->fin_dat)); MD5Update(&ctx, ifs->ifs_ipf_iss_secret, sizeof(ifs->ifs_ipf_iss_secret)); MD5Final(hash, &ctx); bcopy(hash, &newiss, sizeof(newiss)); /* * Now increment our "timer", and add it in to * the computed value. * * XXX Use `addin'? * XXX TCP_ISSINCR too large to use? */ iss_seq_off += 0x00010000; newiss += iss_seq_off; return newiss; } /* ------------------------------------------------------------------------ */ /* Function: fr_nextipid */ /* Returns: int - 0 == success, -1 == error (packet should be droppped) */ /* Parameters: fin(I) - pointer to packet information */ /* */ /* Returns the next IPv4 ID to use for this packet. */ /* ------------------------------------------------------------------------ */ u_short fr_nextipid(fin) fr_info_t *fin; { static u_short ipid = 0; ipstate_t *is; nat_t *nat; u_short id; ipf_stack_t *ifs = fin->fin_ifs; MUTEX_ENTER(&ifs->ifs_ipf_rw); if (fin->fin_state != NULL) { is = fin->fin_state; id = (u_short)(is->is_pkts[(fin->fin_rev << 1) + 1] & 0xffff); } else if (fin->fin_nat != NULL) { nat = fin->fin_nat; id = (u_short)(nat->nat_pkts[fin->fin_out] & 0xffff); } else id = ipid++; MUTEX_EXIT(&ifs->ifs_ipf_rw); return id; } #ifndef IPFILTER_CKSUM /* ARGSUSED */ #endif INLINE void fr_checkv4sum(fin) fr_info_t *fin; { #ifdef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) fin->fin_flx |= FI_BAD; #endif } #ifdef USE_INET6 # ifndef IPFILTER_CKSUM /* ARGSUSED */ # endif INLINE void fr_checkv6sum(fin) fr_info_t *fin; { # ifdef IPFILTER_CKSUM if (fr_checkl4sum(fin) == -1) fin->fin_flx |= FI_BAD; # endif } #endif /* USE_INET6 */ #if (SOLARIS2 < 7) void fr_slowtimer() #else /*ARGSUSED*/ void fr_slowtimer __P((void *arg)) #endif { ipf_stack_t *ifs = arg; READ_ENTER(&ifs->ifs_ipf_global); if (ifs->ifs_fr_running != 1) { ifs->ifs_fr_timer_id = NULL; RWLOCK_EXIT(&ifs->ifs_ipf_global); return; } ipf_expiretokens(ifs); fr_fragexpire(ifs); fr_timeoutstate(ifs); fr_natexpire(ifs); fr_authexpire(ifs); ifs->ifs_fr_ticks++; if (ifs->ifs_fr_running == 1) ifs->ifs_fr_timer_id = timeout(fr_slowtimer, arg, drv_usectohz(500000)); else ifs->ifs_fr_timer_id = NULL; RWLOCK_EXIT(&ifs->ifs_ipf_global); } /* ------------------------------------------------------------------------ */ /* Function: fr_pullup */ /* Returns: NULL == pullup failed, else pointer to protocol header */ /* Parameters: m(I) - pointer to buffer where data packet starts */ /* fin(I) - pointer to packet information */ /* len(I) - number of bytes to pullup */ /* */ /* Attempt to move at least len bytes (from the start of the buffer) into a */ /* single buffer for ease of access. Operating system native functions are */ /* used to manage buffers - if necessary. If the entire packet ends up in */ /* a single buffer, set the FI_COALESCE flag even though fr_coalesce() has */ /* not been called. Both fin_ip and fin_dp are updated before exiting _IF_ */ /* and ONLY if the pullup succeeds. */ /* */ /* We assume that 'min' is a pointer to a buffer that is part of the chain */ /* of buffers that starts at *fin->fin_mp. */ /* ------------------------------------------------------------------------ */ void *fr_pullup(min, fin, len) mb_t *min; fr_info_t *fin; int len; { qpktinfo_t *qpi = fin->fin_qpi; int out = fin->fin_out, dpoff, ipoff; mb_t *m = min, *m1, *m2; char *ip; uint32_t start, stuff, end, value, flags; ipf_stack_t *ifs = fin->fin_ifs; if (m == NULL) return NULL; ip = (char *)fin->fin_ip; if ((fin->fin_flx & FI_COALESCE) != 0) return ip; ipoff = fin->fin_ipoff; if (fin->fin_dp != NULL) dpoff = (char *)fin->fin_dp - (char *)ip; else dpoff = 0; if (M_LEN(m) < len) { /* * pfil_precheck ensures the IP header is on a 32bit * aligned address so simply fail if that isn't currently * the case (should never happen). */ int inc = 0; if (ipoff > 0) { if ((ipoff & 3) != 0) { inc = 4 - (ipoff & 3); if (m->b_rptr - inc >= m->b_datap->db_base) m->b_rptr -= inc; else inc = 0; } } /* * XXX This is here as a work around for a bug with DEBUG * XXX Solaris kernels. The problem is b_prev is used by IP * XXX code as a way to stash the phyint_index for a packet, * XXX this doesn't get reset by IP but freeb does an ASSERT() * XXX for both of these to be NULL. See 6442390. */ m1 = m; m2 = m->b_prev; do { m1->b_next = NULL; m1->b_prev = NULL; m1 = m1->b_cont; } while (m1); /* * Need to preserve checksum information by copying them * to newmp which heads the pulluped message. */ hcksum_retrieve(m, NULL, NULL, &start, &stuff, &end, &value, &flags); if (pullupmsg(m, len + ipoff + inc) == 0) { ATOMIC_INCL(ifs->ifs_frstats[out].fr_pull[1]); FREE_MB_T(*fin->fin_mp); *fin->fin_mp = NULL; fin->fin_m = NULL; fin->fin_ip = NULL; fin->fin_dp = NULL; qpi->qpi_data = NULL; return NULL; } (void) hcksum_assoc(m, NULL, NULL, start, stuff, end, value, flags, 0); m->b_prev = m2; m->b_rptr += inc; fin->fin_m = m; ip = MTOD(m, char *) + ipoff; qpi->qpi_data = ip; } ATOMIC_INCL(ifs->ifs_frstats[out].fr_pull[0]); fin->fin_ip = (ip_t *)ip; if (fin->fin_dp != NULL) fin->fin_dp = (char *)fin->fin_ip + dpoff; if (len == fin->fin_plen) fin->fin_flx |= FI_COALESCE; return ip; } /* * Function: fr_verifysrc * Returns: int (really boolean) * Parameters: fin - packet information * * Check whether the packet has a valid source address for the interface on * which the packet arrived, implementing the "fr_chksrc" feature. * Returns true iff the packet's source address is valid. */ int fr_verifysrc(fin) fr_info_t *fin; { net_data_t net_data_p; phy_if_t phy_ifdata_routeto; struct sockaddr sin; ipf_stack_t *ifs = fin->fin_ifs; if (fin->fin_v == 4) { net_data_p = ifs->ifs_ipf_ipv4; } else if (fin->fin_v == 6) { net_data_p = ifs->ifs_ipf_ipv6; } else { return (0); } /* Get the index corresponding to the if name */ sin.sa_family = (fin->fin_v == 4) ? AF_INET : AF_INET6; bcopy(&fin->fin_saddr, &sin.sa_data, sizeof (struct in_addr)); phy_ifdata_routeto = net_routeto(net_data_p, &sin); return (((phy_if_t)fin->fin_ifp == phy_ifdata_routeto) ? 1 : 0); } /* * Function: fr_fastroute * Returns: 0: success; * -1: failed * Parameters: * mb: the message block where ip head starts * mpp: the pointer to the pointer of the orignal * packet message * fin: packet information * fdp: destination interface information * if it is NULL, no interface information provided. * * This function is for fastroute/to/dup-to rules. It calls * pfil_make_lay2_packet to search route, make lay-2 header * ,and identify output queue for the IP packet. * The destination address depends on the following conditions: * 1: for fastroute rule, fdp is passed in as NULL, so the * destination address is the IP Packet's destination address * 2: for to/dup-to rule, if an ip address is specified after * the interface name, this address is the as destination * address. Otherwise IP Packet's destination address is used */ int fr_fastroute(mb, mpp, fin, fdp) mblk_t *mb, **mpp; fr_info_t *fin; frdest_t *fdp; { net_data_t net_data_p; net_inject_t inj_data; mblk_t *mp = NULL; frentry_t *fr = fin->fin_fr; qpktinfo_t *qpi; ip_t *ip; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; struct sockaddr *sinp; ipf_stack_t *ifs = fin->fin_ifs; #ifndef sparc u_short __iplen, __ipoff; #endif if (fin->fin_v == 4) { net_data_p = ifs->ifs_ipf_ipv4; } else if (fin->fin_v == 6) { net_data_p = ifs->ifs_ipf_ipv6; } else { return (-1); } ip = fin->fin_ip; qpi = fin->fin_qpi; /* * If this is a duplicate mblk then we want ip to point at that * data, not the original, if and only if it is already pointing at * the current mblk data. * * Otherwise, if it's not a duplicate, and we're not already pointing * at the current mblk data, then we want to ensure that the data * points at ip. */ if ((ip == (ip_t *)qpi->qpi_m->b_rptr) && (qpi->qpi_m != mb)) { ip = (ip_t *)mb->b_rptr; } else if ((qpi->qpi_m == mb) && (ip != (ip_t *)qpi->qpi_m->b_rptr)) { qpi->qpi_m->b_rptr = (uchar_t *)ip; qpi->qpi_off = 0; } /* * If there is another M_PROTO, we don't want it */ if (*mpp != mb) { mp = unlinkb(*mpp); freeb(*mpp); *mpp = mp; } sinp = (struct sockaddr *)&inj_data.ni_addr; sin = (struct sockaddr_in *)sinp; sin6 = (struct sockaddr_in6 *)sinp; bzero((char *)&inj_data.ni_addr, sizeof (inj_data.ni_addr)); inj_data.ni_addr.ss_family = (fin->fin_v == 4) ? AF_INET : AF_INET6; inj_data.ni_packet = mb; /* * In case we're here due to "to " being used with * "keep state", check that we're going in the correct * direction. */ if (fdp != NULL) { if ((fr != NULL) && (fdp->fd_ifp != NULL) && (fin->fin_rev != 0) && (fdp == &fr->fr_tif)) goto bad_fastroute; inj_data.ni_physical = (phy_if_t)fdp->fd_ifp; if (fin->fin_v == 4) { sin->sin_addr = fdp->fd_ip; } else { sin6->sin6_addr = fdp->fd_ip6.in6; } } else { if (fin->fin_v == 4) { sin->sin_addr = ip->ip_dst; } else { sin6->sin6_addr = ((ip6_t *)ip)->ip6_dst; } inj_data.ni_physical = net_routeto(net_data_p, sinp); } /* * Clear the hardware checksum flags from packets that we are doing * input processing on as leaving them set will cause the outgoing * NIC (if it supports hardware checksum) to calculate them anew, * using the old (correct) checksums as the pseudo value to start * from. */ if (fin->fin_out == 0) { DB_CKSUMFLAGS(mb) = 0; } *mpp = mb; if (fin->fin_out == 0) { void *saveifp; u_32_t pass; saveifp = fin->fin_ifp; fin->fin_ifp = (void *)inj_data.ni_physical; fin->fin_flx &= ~FI_STATE; fin->fin_out = 1; (void) fr_acctpkt(fin, &pass); fin->fin_fr = NULL; if (!fr || !(fr->fr_flags & FR_RETMASK)) (void) fr_checkstate(fin, &pass); if (fr_checknatout(fin, NULL) == -1) goto bad_fastroute; fin->fin_out = 0; fin->fin_ifp = saveifp; if (fin->fin_nat != NULL) fr_natderef((nat_t **)&fin->fin_nat, ifs); } #ifndef sparc if (fin->fin_v == 4) { __iplen = (u_short)ip->ip_len, __ipoff = (u_short)ip->ip_off; ip->ip_len = htons(__iplen); ip->ip_off = htons(__ipoff); } #endif if (net_data_p) { if (net_inject(net_data_p, NI_DIRECT_OUT, &inj_data) < 0) { return (-1); } } ifs->ifs_fr_frouteok[0]++; return 0; bad_fastroute: freemsg(mb); ifs->ifs_fr_frouteok[1]++; return -1; } /* ------------------------------------------------------------------------ */ /* Function: ipf_hook_out */ /* Returns: int - 0 == packet ok, else problem, free packet if not done */ /* Parameters: event(I) - pointer to event */ /* info(I) - pointer to hook information for firewalling */ /* */ /* Calling ipf_hook. */ /* ------------------------------------------------------------------------ */ /*ARGSUSED*/ int ipf_hook_out(hook_event_token_t token, hook_data_t info, netstack_t *ns) { return ipf_hook(info, 1, 0, ns); } /* ------------------------------------------------------------------------ */ /* Function: ipf_hook_in */ /* Returns: int - 0 == packet ok, else problem, free packet if not done */ /* Parameters: event(I) - pointer to event */ /* info(I) - pointer to hook information for firewalling */ /* */ /* Calling ipf_hook. */ /* ------------------------------------------------------------------------ */ /*ARGSUSED*/ int ipf_hook_in(hook_event_token_t token, hook_data_t info, netstack_t *ns) { return ipf_hook(info, 0, 0, ns); } /* ------------------------------------------------------------------------ */ /* Function: ipf_hook_loop_out */ /* Returns: int - 0 == packet ok, else problem, free packet if not done */ /* Parameters: event(I) - pointer to event */ /* info(I) - pointer to hook information for firewalling */ /* */ /* Calling ipf_hook. */ /* ------------------------------------------------------------------------ */ /*ARGSUSED*/ int ipf_hook_loop_out(hook_event_token_t token, hook_data_t info, netstack_t *ns) { return ipf_hook(info, 1, 1, ns); } /* ------------------------------------------------------------------------ */ /* Function: ipf_hook_loop_in */ /* Returns: int - 0 == packet ok, else problem, free packet if not done */ /* Parameters: event(I) - pointer to event */ /* info(I) - pointer to hook information for firewalling */ /* */ /* Calling ipf_hook. */ /* ------------------------------------------------------------------------ */ /*ARGSUSED*/ int ipf_hook_loop_in(hook_event_token_t token, hook_data_t info, netstack_t *ns) { return ipf_hook(info, 0, 1, ns); } /* ------------------------------------------------------------------------ */ /* Function: ipf_hook */ /* Returns: int - 0 == packet ok, else problem, free packet if not done */ /* Parameters: info(I) - pointer to hook information for firewalling */ /* out(I) - whether packet is going in or out */ /* loopback(I) - whether packet is a loopback packet or not */ /* */ /* Stepping stone function between the IP mainline and IPFilter. Extracts */ /* parameters out of the info structure and forms them up to be useful for */ /* calling ipfilter. */ /* ------------------------------------------------------------------------ */ int ipf_hook(hook_data_t info, int out, int loopback, netstack_t *ns) { hook_pkt_event_t *fw; int rval, v, hlen; qpktinfo_t qpi; u_short swap; phy_if_t phy; ip_t *ip; fw = (hook_pkt_event_t *)info; ASSERT(fw != NULL); phy = (out == 0) ? fw->hpe_ifp : fw->hpe_ofp; ip = fw->hpe_hdr; v = ip->ip_v; if (v == IPV4_VERSION) { swap = ntohs(ip->ip_len); ip->ip_len = swap; swap = ntohs(ip->ip_off); ip->ip_off = swap; hlen = IPH_HDR_LENGTH(ip); } else hlen = sizeof (ip6_t); bzero(&qpi, sizeof (qpktinfo_t)); qpi.qpi_m = fw->hpe_mb; qpi.qpi_data = fw->hpe_hdr; qpi.qpi_off = (char *)qpi.qpi_data - (char *)fw->hpe_mb->b_rptr; qpi.qpi_ill = (void *)phy; qpi.qpi_flags = 0; if (fw->hpe_flags & HPE_MULTICAST) qpi.qpi_flags |= FI_MBCAST|FI_MULTICAST; else if (fw->hpe_flags & HPE_BROADCAST) qpi.qpi_flags = FI_MBCAST|FI_BROADCAST; if (loopback) qpi.qpi_flags |= FI_NOCKSUM; rval = fr_check(fw->hpe_hdr, hlen, qpi.qpi_ill, out, &qpi, fw->hpe_mp, ns->netstack_ipf); /* For fastroute cases, fr_check returns 0 with mp set to NULL */ if (rval == 0 && *(fw->hpe_mp) == NULL) rval = 1; /* Notify IP the packet mblk_t and IP header pointers. */ fw->hpe_mb = qpi.qpi_m; fw->hpe_hdr = qpi.qpi_data; if ((rval == 0) && (v == IPV4_VERSION)) { ip = qpi.qpi_data; swap = ntohs(ip->ip_len); ip->ip_len = swap; swap = ntohs(ip->ip_off); ip->ip_off = swap; } return rval; } /* ------------------------------------------------------------------------ */ /* Function: ipf_nic_event_v4 */ /* Returns: int - 0 == no problems encountered */ /* Parameters: event(I) - pointer to event */ /* info(I) - pointer to information about a NIC event */ /* */ /* Function to receive asynchronous NIC events from IP */ /* ------------------------------------------------------------------------ */ /*ARGSUSED*/ int ipf_nic_event_v4(hook_event_token_t event, hook_data_t info, netstack_t *ns) { struct sockaddr_in *sin; hook_nic_event_t *hn; ipf_stack_t *ifs = ns->netstack_ipf; hn = (hook_nic_event_t *)info; switch (hn->hne_event) { case NE_PLUMB : frsync(IPFSYNC_NEWIFP, 4, (void *)hn->hne_nic, hn->hne_data, ifs); fr_natifpsync(IPFSYNC_NEWIFP, (void *)hn->hne_nic, hn->hne_data, ifs); fr_statesync(IPFSYNC_NEWIFP, 4, (void *)hn->hne_nic, hn->hne_data, ifs); break; case NE_UNPLUMB : frsync(IPFSYNC_OLDIFP, 4, (void *)hn->hne_nic, NULL, ifs); fr_natifpsync(IPFSYNC_OLDIFP, (void *)hn->hne_nic, NULL, ifs); fr_statesync(IPFSYNC_OLDIFP, 4, (void *)hn->hne_nic, NULL, ifs); break; case NE_ADDRESS_CHANGE : /* * We only respond to events for logical interface 0 because * IPFilter only uses the first address given to a network * interface. We check for hne_lif==1 because the netinfo * code maps adds 1 to the lif number so that it can return * 0 to indicate "no more lifs" when walking them. */ if (hn->hne_lif == 1) { frsync(IPFSYNC_RESYNC, 4, (void *)hn->hne_nic, NULL, ifs); sin = hn->hne_data; fr_nataddrsync((void *)hn->hne_nic, &sin->sin_addr, ifs); } break; default : break; } return 0; } /* ------------------------------------------------------------------------ */ /* Function: ipf_nic_event_v6 */ /* Returns: int - 0 == no problems encountered */ /* Parameters: event(I) - pointer to event */ /* info(I) - pointer to information about a NIC event */ /* */ /* Function to receive asynchronous NIC events from IP */ /* ------------------------------------------------------------------------ */ /*ARGSUSED*/ int ipf_nic_event_v6(hook_event_token_t event, hook_data_t info, netstack_t *ns) { hook_nic_event_t *hn; ipf_stack_t *ifs = ns->netstack_ipf; hn = (hook_nic_event_t *)info; switch (hn->hne_event) { case NE_PLUMB : frsync(IPFSYNC_NEWIFP, 6, (void *)hn->hne_nic, hn->hne_data, ifs); fr_statesync(IPFSYNC_NEWIFP, 6, (void *)hn->hne_nic, hn->hne_data, ifs); break; case NE_UNPLUMB : frsync(IPFSYNC_OLDIFP, 6, (void *)hn->hne_nic, NULL, ifs); fr_statesync(IPFSYNC_OLDIFP, 6, (void *)hn->hne_nic, NULL, ifs); break; case NE_ADDRESS_CHANGE : break; default : break; } return 0; }