/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "libilb_impl.h" #include "ilbd.h" /* until we all use AF_* macros ... */ #define AF_2_IPPROTO(_af) (_af == AF_INET)?IPPROTO_IP:IPPROTO_IPV6 #define IPPROTO_2_AF(_i) (_i == IPPROTO_IP)?AF_INET:AF_INET6 #define PROTOCOL_LEN 16 /* protocol type */ #define ADDR_LEN (2 * INET6_ADDRSTRLEN + 1) /* prxy src range */ #define PORT_LEN 6 /* hcport:1-65535 or "ANY" */ static ilb_status_t ilbd_disable_one_rule(ilbd_rule_t *, boolean_t); static uint32_t i_flags_d2k(int); #define ILB_SGSRV_2_KSRV(s, k) \ (k)->addr = (s)->sgs_addr; \ (k)->min_port = (s)->sgs_minport; \ (k)->max_port = (s)->sgs_maxport; \ (k)->flags = i_flags_d2k((s)->sgs_flags); \ (k)->err = 0; \ (void) strlcpy((k)->name, (s)->sgs_srvID, sizeof ((k)->name)) list_t ilbd_rule_hlist; static ilb_algo_t algo_impl2lib(ilb_algo_impl_t a) { switch (a) { case ILB_ALG_IMPL_ROUNDROBIN: return (ILB_ALG_ROUNDROBIN); case ILB_ALG_IMPL_HASH_IP: return (ILB_ALG_HASH_IP); case ILB_ALG_IMPL_HASH_IP_SPORT: return (ILB_ALG_HASH_IP_SPORT); case ILB_ALG_IMPL_HASH_IP_VIP: return (ILB_ALG_HASH_IP_VIP); } return (0); } static ilb_topo_t topo_impl2lib(ilb_topo_impl_t t) { switch (t) { case ILB_TOPO_IMPL_DSR: return (ILB_TOPO_DSR); case ILB_TOPO_IMPL_NAT: return (ILB_TOPO_NAT); case ILB_TOPO_IMPL_HALF_NAT: return (ILB_TOPO_HALF_NAT); } return (0); } ilb_algo_impl_t algo_lib2impl(ilb_algo_t a) { switch (a) { case ILB_ALG_ROUNDROBIN: return (ILB_ALG_IMPL_ROUNDROBIN); case ILB_ALG_HASH_IP: return (ILB_ALG_IMPL_HASH_IP); case ILB_ALG_HASH_IP_SPORT: return (ILB_ALG_IMPL_HASH_IP_SPORT); case ILB_ALG_HASH_IP_VIP: return (ILB_ALG_IMPL_HASH_IP_VIP); } return (0); } ilb_topo_impl_t topo_lib2impl(ilb_topo_t t) { switch (t) { case ILB_TOPO_DSR: return (ILB_TOPO_IMPL_DSR); case ILB_TOPO_NAT: return (ILB_TOPO_IMPL_NAT); case ILB_TOPO_HALF_NAT: return (ILB_TOPO_IMPL_HALF_NAT); } return (0); } /* * Walk the list of rules and check if its safe to add the * the server to the rule (this is a list of rules hanging * off of a server group) */ ilb_status_t i_check_srv2rules(list_t *rlist, ilb_sg_srv_t *srv) { ilb_status_t rc = ILB_STATUS_OK; ilbd_rule_t *rl; int server_portrange, rule_portrange; int srv_minport, srv_maxport; int r_minport, r_maxport; if (srv == NULL) return (ILB_STATUS_OK); srv_minport = ntohs(srv->sgs_minport); srv_maxport = ntohs(srv->sgs_maxport); for (rl = list_head(rlist); rl != NULL; rl = list_next(rlist, rl)) { r_minport = ntohs(rl->irl_minport); r_maxport = ntohs(rl->irl_maxport); if ((srv_minport != 0) && (srv_minport == srv_maxport)) { /* server has single port */ if (rl->irl_topo == ILB_TOPO_DSR) { /* * either we have a DSR rule with a port * range, or both server and rule * have single ports but their values * don't match - this is incompatible */ if (r_maxport > r_minport) { rc = ILB_STATUS_INVAL_SRVR; break; } else if (srv_minport != r_minport) { rc = ILB_STATUS_BADPORT; break; } } if (rl->irl_hcpflag == ILB_HCI_PROBE_FIX && rl->irl_hcport != srv_minport) { rc = ILB_STATUS_BADPORT; break; } } else if (srv_maxport > srv_minport) { /* server has a port range */ if ((rl->irl_topo == ILB_TOPO_DSR) && (r_maxport > r_minport)) { if ((r_minport != srv_minport) || (r_maxport != srv_maxport)) { /* * we have a DSR rule with a port range * and its min and max port values * does not meet that of server's * - this is incompatible */ rc = ILB_STATUS_BADPORT; break; } } else if ((rl->irl_topo == ILB_TOPO_DSR) && (r_maxport == r_minport)) { /* * we have a DSR rule with a single * port and a server with a port range * - this is incompatible */ rc = ILB_STATUS_INVAL_SRVR; break; } else if (((rl->irl_topo == ILB_TOPO_NAT) || (rl->irl_topo == ILB_TOPO_HALF_NAT)) && (r_maxport > r_minport)) { server_portrange = srv_maxport - srv_minport; rule_portrange = r_maxport - r_minport; if (rule_portrange != server_portrange) { /* * we have a NAT/Half-NAT rule with * a port range and server with a port * range and there is a mismatch in the * sizes of the port ranges - this is * incompatible */ rc = ILB_STATUS_INVAL_SRVR; break; } } if (rl->irl_hcpflag == ILB_HCI_PROBE_FIX && (rl->irl_hcport > srv_maxport || rl->irl_hcport < srv_minport)) { rc = ILB_STATUS_BADPORT; break; } } } return (rc); } void i_setup_rule_hlist(void) { list_create(&ilbd_rule_hlist, sizeof (ilbd_rule_t), offsetof(ilbd_rule_t, irl_link)); } ilb_status_t i_ilbd_save_rule(ilbd_rule_t *irl, ilbd_scf_cmd_t scf_cmd) { boolean_t enable = irl->irl_flags & ILB_FLAGS_RULE_ENABLED; switch (scf_cmd) { case ILBD_SCF_CREATE: return (ilbd_create_pg(ILBD_SCF_RULE, (void *)irl)); case ILBD_SCF_DESTROY: return (ilbd_destroy_pg(ILBD_SCF_RULE, irl->irl_name)); case ILBD_SCF_ENABLE_DISABLE: return (ilbd_change_prop(ILBD_SCF_RULE, irl->irl_name, "status", &enable)); default: logdebug("i_ilbd_save_rule: invalid scf cmd %d", scf_cmd); return (ILB_STATUS_INVAL_CMD); } } /* * allocate a new daemon-specific rule from the "template" passed * in in *r */ static ilbd_rule_t * i_alloc_ilbd_rule(ilb_rule_info_t *r) { ilbd_rule_t *rl; rl = calloc(sizeof (*rl), 1); if (rl != NULL && r != NULL) bcopy(r, &rl->irl_info, sizeof (*r)); return (rl); } static ilbd_rule_t * i_find_rule_byname(const char *name) { ilbd_rule_t *rl; /* find position of rule in list */ rl = list_head(&ilbd_rule_hlist); while (rl != NULL && strncmp(rl->irl_name, name, sizeof (rl->irl_name)) != 0) { rl = list_next(&ilbd_rule_hlist, rl); } return (rl); } /* * get exactly one rule (named in rl->irl_name) data from kernel */ static ilb_status_t ilb_get_krule(ilb_rule_info_t *rl) { ilb_status_t rc; ilb_rule_cmd_t kcmd; kcmd.cmd = ILB_LIST_RULE; (void) strlcpy(kcmd.name, rl->rl_name, sizeof (kcmd.name)); kcmd.flags = 0; rc = do_ioctl(&kcmd, 0); if (rc != ILB_STATUS_OK) return (rc); rl->rl_flags = kcmd.flags; rl->rl_ipversion = IPPROTO_2_AF(kcmd.ip_ver); rl->rl_vip = kcmd.vip; rl->rl_proto = kcmd.proto; rl->rl_minport = kcmd.min_port; rl->rl_maxport = kcmd.max_port; rl->rl_algo = algo_impl2lib(kcmd.algo); rl->rl_topo = topo_impl2lib(kcmd.topo); rl->rl_stickymask = kcmd.sticky_mask; rl->rl_nat_src_start = kcmd.nat_src_start; rl->rl_nat_src_end = kcmd.nat_src_end; (void) strlcpy(rl->rl_name, kcmd.name, sizeof (rl->rl_name)); rl->rl_conndrain = kcmd.conn_drain_timeout; rl->rl_nat_timeout = kcmd.nat_expiry; rl->rl_sticky_timeout = kcmd.sticky_expiry; return (ILB_STATUS_OK); } ilb_status_t ilbd_retrieve_rule(ilbd_name_t rl_name, uint32_t *rbuf, size_t *rbufsz) { ilbd_rule_t *irl = NULL; ilb_status_t rc; ilb_rule_info_t *rinfo; irl = i_find_rule_byname(rl_name); if (irl == NULL) return (ILB_STATUS_ENOENT); ilbd_reply_ok(rbuf, rbufsz); rinfo = (ilb_rule_info_t *)&((ilb_comm_t *)rbuf)->ic_data; bcopy(&irl->irl_info, rinfo, sizeof (*rinfo)); /* * Check if the various timeout values are 0. If one is, get the * default values from kernel. */ if (rinfo->rl_conndrain == 0 || rinfo->rl_nat_timeout == 0 || rinfo->rl_sticky_timeout == 0) { ilb_rule_info_t tmp_info; (void) strcpy(tmp_info.rl_name, rinfo->rl_name); rc = ilb_get_krule(&tmp_info); if (rc != ILB_STATUS_OK) return (rc); if (rinfo->rl_conndrain == 0) rinfo->rl_conndrain = tmp_info.rl_conndrain; if ((rinfo->rl_topo == ILB_TOPO_IMPL_NAT || rinfo->rl_topo == ILB_TOPO_IMPL_HALF_NAT) && rinfo->rl_nat_timeout == 0) { rinfo->rl_nat_timeout = tmp_info.rl_nat_timeout; } if ((rinfo->rl_flags & ILB_FLAGS_RULE_STICKY) && rinfo->rl_sticky_timeout == 0) { rinfo->rl_sticky_timeout = tmp_info.rl_sticky_timeout; } } *rbufsz += sizeof (ilb_rule_info_t); return (ILB_STATUS_OK); } static ilb_status_t ilbd_destroy_one_rule(ilbd_rule_t *irl) { ilb_status_t rc; ilb_name_cmd_t kcmd; /* * as far as talking to the kernel is concerned, "all rules" * is handled in one go somewhere else, so we only * tell the kernel about single rules here. */ if ((irl->irl_flags & ILB_FLAGS_RULE_ALLRULES) == 0) { kcmd.cmd = ILB_DESTROY_RULE; (void) strlcpy(kcmd.name, irl->irl_name, sizeof (kcmd.name)); kcmd.flags = 0; rc = do_ioctl(&kcmd, 0); if (rc != ILB_STATUS_OK) return (rc); } list_remove(&irl->irl_sg->isg_rulelist, irl); list_remove(&ilbd_rule_hlist, irl); /* * When dissociating a rule, only two errors can happen. The hc * name is incorrect or the rule is not associated with the hc * object. Both should not happen.... The check is for debugging * purpose. */ if (RULE_HAS_HC(irl) && (rc = ilbd_hc_dissociate_rule(irl)) != ILB_STATUS_OK) { logerr("ilbd_destroy_one_rule: cannot " "dissociate %s from hc object %s: %d", irl->irl_name, irl->irl_hcname, rc); } rc = i_ilbd_save_rule(irl, ILBD_SCF_DESTROY); if (rc != ILB_STATUS_OK) logdebug("ilbd_destroy_rule: save rule failed"); free(irl); return (rc); } /* * the following two functions are the other's opposite, and can * call into each other for roll back purposes in case of error. * To avoid endless recursion, the 'is_rollback' parameter must be * set to B_TRUE in the roll back case. */ static ilb_status_t ilbd_enable_one_rule(ilbd_rule_t *irl, boolean_t is_rollback) { ilb_status_t rc = ILB_STATUS_OK; ilb_name_cmd_t kcmd; /* no use sending a no-op to the kernel */ if ((irl->irl_flags & ILB_FLAGS_RULE_ENABLED) != 0) return (ILB_STATUS_OK); irl->irl_flags |= ILB_FLAGS_RULE_ENABLED; /* "all rules" is handled in one go somewhere else, not here */ if ((irl->irl_flags & ILB_FLAGS_RULE_ALLRULES) == 0) { kcmd.cmd = ILB_ENABLE_RULE; (void) strlcpy(kcmd.name, irl->irl_name, sizeof (kcmd.name)); kcmd.flags = 0; rc = do_ioctl(&kcmd, 0); if (rc != ILB_STATUS_OK) return (rc); } if (RULE_HAS_HC(irl) && (rc = ilbd_hc_enable_rule(irl)) != ILB_STATUS_OK) { /* Undo the kernel work */ kcmd.cmd = ILB_DISABLE_RULE; /* Cannot do much if ioctl fails... */ (void) do_ioctl(&kcmd, 0); return (rc); } if (!is_rollback) { if (rc == ILB_STATUS_OK) rc = i_ilbd_save_rule(irl, ILBD_SCF_ENABLE_DISABLE); if (rc != ILB_STATUS_OK) /* ignore rollback return code */ (void) ilbd_disable_one_rule(irl, B_TRUE); } return (rc); } static ilb_status_t ilbd_disable_one_rule(ilbd_rule_t *irl, boolean_t is_rollback) { ilb_status_t rc = ILB_STATUS_OK; ilb_name_cmd_t kcmd; /* no use sending a no-op to the kernel */ if ((irl->irl_flags & ILB_FLAGS_RULE_ENABLED) == 0) return (ILB_STATUS_OK); irl->irl_flags &= ~ILB_FLAGS_RULE_ENABLED; /* "all rules" is handled in one go somewhere else, not here */ if ((irl->irl_flags & ILB_FLAGS_RULE_ALLRULES) == 0) { kcmd.cmd = ILB_DISABLE_RULE; (void) strlcpy(kcmd.name, irl->irl_name, sizeof (kcmd.name)); kcmd.flags = 0; rc = do_ioctl(&kcmd, 0); if (rc != ILB_STATUS_OK) return (rc); } if (RULE_HAS_HC(irl) && (rc = ilbd_hc_disable_rule(irl)) != ILB_STATUS_OK) { /* Undo the kernel work */ kcmd.cmd = ILB_ENABLE_RULE; /* Cannot do much if ioctl fails... */ (void) do_ioctl(&kcmd, 0); return (rc); } if (!is_rollback) { if (rc == ILB_STATUS_OK) rc = i_ilbd_save_rule(irl, ILBD_SCF_ENABLE_DISABLE); if (rc != ILB_STATUS_OK) /* ignore rollback return code */ (void) ilbd_enable_one_rule(irl, B_TRUE); } return (rc); } /* * Generates an audit record for a supplied rule name * Used for enable_rule, disable_rule, delete_rule, * and create_rule subcommands */ static void ilbd_audit_rule_event(const char *audit_rule_name, ilb_rule_info_t *rlinfo, ilbd_cmd_t cmd, ilb_status_t rc, ucred_t *ucredp) { adt_session_data_t *ah; adt_event_data_t *event; au_event_t flag; int scf_val_len = ILBD_MAX_VALUE_LEN; char *aobuf = NULL; /* algo:topo */ char *valstr1 = NULL; char *valstr2 = NULL; char pbuf[PROTOCOL_LEN]; /* protocol */ char pxbuf[ADDR_LEN]; /* prxy src range */ char hcpbuf[PORT_LEN]; /* hcport */ char addrstr_buf[INET6_ADDRSTRLEN]; char addrstr_buf1[INET6_ADDRSTRLEN]; int audit_error; if ((ucredp == NULL) && (cmd == ILBD_CREATE_RULE)) { /* * we came here from the path where ilbd incorporates * the configuration that is listed in SCF : * i_ilbd_read_config->ilbd_walk_rule_pgs-> * ->ilbd_scf_instance_walk_pg->ilbd_create_rule * We skip auditing in that case */ return; } if (adt_start_session(&ah, NULL, 0) != 0) { logerr("ilbd_audit_rule_event: adt_start_session failed"); exit(EXIT_FAILURE); } if (adt_set_from_ucred(ah, ucredp, ADT_NEW) != 0) { (void) adt_end_session(ah); logerr("ilbd_audit_rule_event: adt_set_from_ucred failed"); exit(EXIT_FAILURE); } if (cmd == ILBD_ENABLE_RULE) flag = ADT_ilb_enable_rule; else if (cmd == ILBD_DISABLE_RULE) flag = ADT_ilb_disable_rule; else if (cmd == ILBD_DESTROY_RULE) flag = ADT_ilb_delete_rule; else if (cmd == ILBD_CREATE_RULE) flag = ADT_ilb_create_rule; if ((event = adt_alloc_event(ah, flag)) == NULL) { logerr("ilbd_audit_rule_event: adt_alloc_event failed"); exit(EXIT_FAILURE); } (void) memset((char *)event, 0, sizeof (adt_event_data_t)); switch (cmd) { case ILBD_DESTROY_RULE: event->adt_ilb_delete_rule.auth_used = NET_ILB_CONFIG_AUTH; event->adt_ilb_delete_rule.rule_name = (char *)audit_rule_name; break; case ILBD_ENABLE_RULE: event->adt_ilb_enable_rule.auth_used = NET_ILB_ENABLE_AUTH; event->adt_ilb_enable_rule.rule_name = (char *)audit_rule_name; break; case ILBD_DISABLE_RULE: event->adt_ilb_disable_rule.auth_used = NET_ILB_ENABLE_AUTH; event->adt_ilb_disable_rule.rule_name = (char *)audit_rule_name; break; case ILBD_CREATE_RULE: if (((aobuf = malloc(scf_val_len)) == NULL) || ((valstr1 = malloc(scf_val_len)) == NULL) || ((valstr2 = malloc(scf_val_len)) == NULL)) { logerr("ilbd_audit_rule_event: could not" " allocate buffer"); exit(EXIT_FAILURE); } event->adt_ilb_create_rule.auth_used = NET_ILB_CONFIG_AUTH; /* Fill in virtual IP address */ addrstr_buf[0] = '\0'; ilbd_addr2str(&rlinfo->rl_vip, addrstr_buf, sizeof (addrstr_buf)); event->adt_ilb_create_rule.virtual_ipaddress = addrstr_buf; /* Fill in port - could be a single value or a range */ event->adt_ilb_create_rule.min_port = ntohs(rlinfo->rl_minport); if (ntohs(rlinfo->rl_maxport) > ntohs(rlinfo->rl_minport)) { /* port range */ event->adt_ilb_create_rule.max_port = ntohs(rlinfo->rl_maxport); } else { /* in audit record, max=min when single port */ event->adt_ilb_create_rule.max_port = ntohs(rlinfo->rl_minport); } /* * Fill in protocol - if user does not specify it, * its TCP by default */ if (rlinfo->rl_proto == IPPROTO_UDP) (void) snprintf(pbuf, PROTOCOL_LEN, "UDP"); else (void) snprintf(pbuf, PROTOCOL_LEN, "TCP"); event->adt_ilb_create_rule.protocol = pbuf; /* Fill in algorithm and operation type */ ilbd_algo_to_str(rlinfo->rl_algo, valstr1); ilbd_topo_to_str(rlinfo->rl_topo, valstr2); (void) snprintf(aobuf, scf_val_len, "%s:%s", valstr1, valstr2); event->adt_ilb_create_rule.algo_optype = aobuf; /* Fill in proxy-src for the NAT case */ if (rlinfo->rl_topo == ILB_TOPO_NAT) { ilbd_addr2str(&rlinfo->rl_nat_src_start, addrstr_buf, sizeof (addrstr_buf)); if (&rlinfo->rl_nat_src_end == 0) { /* Single address */ (void) snprintf(pxbuf, ADDR_LEN, "%s", addrstr_buf); } else { /* address range */ ilbd_addr2str(&rlinfo->rl_nat_src_end, addrstr_buf1, sizeof (addrstr_buf1)); (void) snprintf(pxbuf, ADDR_LEN, "%s-%s", addrstr_buf, addrstr_buf1); } event->adt_ilb_create_rule.proxy_src = pxbuf; } /* * Fill in pmask if user has specified one - 0 means * no persistence */ valstr1[0] = '\0'; ilbd_ip_to_str(rlinfo->rl_ipversion, &rlinfo->rl_stickymask, valstr1); event->adt_ilb_create_rule.persist_mask = valstr1; /* If there is a hcname */ if (rlinfo->rl_hcname[0] != '\0') event->adt_ilb_create_rule.hcname = rlinfo->rl_hcname; /* Fill in hcport */ if (rlinfo->rl_hcpflag == ILB_HCI_PROBE_FIX) { /* hcport is specified by user */ (void) snprintf(hcpbuf, PORT_LEN, "%d", rlinfo->rl_hcport); event->adt_ilb_create_rule.hcport = hcpbuf; } else if (rlinfo->rl_hcpflag == ILB_HCI_PROBE_ANY) { /* user has specified "ANY" */ (void) snprintf(hcpbuf, PORT_LEN, "ANY"); event->adt_ilb_create_rule.hcport = hcpbuf; } /* * Fill out the conndrain, nat_timeout and persist_timeout * If the user does not specify them, the default value * is set in the kernel. Userland does not know what * the values are. So if the user * does not specify these values they will show up as * 0 in the audit record. */ event->adt_ilb_create_rule.conndrain_timeout = rlinfo->rl_conndrain; event->adt_ilb_create_rule.nat_timeout = rlinfo->rl_nat_timeout; event->adt_ilb_create_rule.persist_timeout = rlinfo->rl_sticky_timeout; /* Fill out servergroup and rule name */ event->adt_ilb_create_rule.server_group = rlinfo->rl_sgname; event->adt_ilb_create_rule.rule_name = rlinfo->rl_name; break; } if (rc == ILB_STATUS_OK) { if (adt_put_event(event, ADT_SUCCESS, ADT_SUCCESS) != 0) { logerr("ilbd_audit_rule_event:adt_put_event failed"); exit(EXIT_FAILURE); } } else { audit_error = ilberror2auditerror(rc); if (adt_put_event(event, ADT_FAILURE, audit_error) != 0) { logerr("ilbd_audit_rule_event: adt_put_event failed"); exit(EXIT_FAILURE); } } adt_free_event(event); free(aobuf); free(valstr1); free(valstr2); (void) adt_end_session(ah); } static ilb_status_t i_ilbd_action_switch(ilbd_rule_t *irl, ilbd_cmd_t cmd, boolean_t is_rollback, ucred_t *ucredp) { ilb_status_t rc; switch (cmd) { case ILBD_DESTROY_RULE: rc = ilbd_destroy_one_rule(irl); if (!is_rollback) { ilbd_audit_rule_event(irl->irl_name, NULL, cmd, rc, ucredp); } return (rc); case ILBD_ENABLE_RULE: rc = ilbd_enable_one_rule(irl, is_rollback); if (!is_rollback) { ilbd_audit_rule_event(irl->irl_name, NULL, cmd, rc, ucredp); } return (rc); case ILBD_DISABLE_RULE: rc = ilbd_disable_one_rule(irl, is_rollback); if (!is_rollback) { ilbd_audit_rule_event(irl->irl_name, NULL, cmd, rc, ucredp); } return (rc); } return (ILB_STATUS_INVAL_CMD); } static ilb_cmd_t i_ilbd2ilb_cmd(ilbd_cmd_t c) { ilb_cmd_t r; switch (c) { case ILBD_CREATE_RULE: r = ILB_CREATE_RULE; break; case ILBD_DESTROY_RULE: r = ILB_DESTROY_RULE; break; case ILBD_ENABLE_RULE: r = ILB_ENABLE_RULE; break; case ILBD_DISABLE_RULE: r = ILB_DISABLE_RULE; break; } return (r); } static ilbd_cmd_t get_undo_cmd(ilbd_cmd_t cmd) { ilbd_cmd_t u_cmd; switch (cmd) { case ILBD_DESTROY_RULE: u_cmd = ILBD_BAD_CMD; break; case ILBD_ENABLE_RULE: u_cmd = ILBD_DISABLE_RULE; break; case ILBD_DISABLE_RULE: u_cmd = ILBD_ENABLE_RULE; break; } return (u_cmd); } static ilb_status_t i_ilbd_rule_action(const char *rule_name, const struct passwd *ps, ilbd_cmd_t cmd, ucred_t *ucredp) { ilbd_rule_t *irl, *irl_next; boolean_t is_all_rules = B_FALSE; ilb_status_t rc = ILB_STATUS_OK; ilb_name_cmd_t kcmd; ilbd_cmd_t u_cmd; char rulename[ILB_NAMESZ]; if (ps != NULL) { if ((cmd == ILBD_ENABLE_RULE) || (cmd == ILBD_DISABLE_RULE)) rc = ilbd_check_client_enable_auth(ps); else rc = ilbd_check_client_config_auth(ps); /* generate the audit record before bailing out */ if (rc != ILB_STATUS_OK) { if (rule_name != '\0') { ilbd_audit_rule_event(rule_name, NULL, cmd, rc, ucredp); } else { (void) snprintf(rulename, sizeof (rulename), "all"); ilbd_audit_rule_event(rulename, NULL, cmd, rc, ucredp); } goto out; } } is_all_rules = rule_name[0] == 0; /* just one rule */ if (!is_all_rules) { irl = i_find_rule_byname(rule_name); if (irl == NULL) { rc = ILB_STATUS_ENORULE; ilbd_audit_rule_event(rule_name, NULL, cmd, rc, ucredp); goto out; } /* auditing will be done by i_ilbd_action_switch() */ rc = i_ilbd_action_switch(irl, cmd, B_FALSE, ucredp); goto out; } /* all rules: first tell the kernel, then walk the daemon's list */ kcmd.cmd = i_ilbd2ilb_cmd(cmd); kcmd.flags = ILB_RULE_ALLRULES; rc = do_ioctl(&kcmd, 0); if (rc != ILB_STATUS_OK) { (void) snprintf(rulename, sizeof (rulename), "all"); ilbd_audit_rule_event(rulename, NULL, cmd, rc, ucredp); goto out; } irl = list_head(&ilbd_rule_hlist); while (irl != NULL) { irl_next = list_next(&ilbd_rule_hlist, irl); irl->irl_flags |= ILB_FLAGS_RULE_ALLRULES; /* auditing will be done by i_ilbd_action_switch() */ rc = i_ilbd_action_switch(irl, cmd, B_FALSE, ucredp); irl->irl_flags &= ~ILB_FLAGS_RULE_ALLRULES; if (rc != ILB_STATUS_OK) goto rollback_list; irl = irl_next; } return (rc); rollback_list: u_cmd = get_undo_cmd(cmd); if (u_cmd == ILBD_BAD_CMD) return (rc); if (is_all_rules) { kcmd.cmd = i_ilbd2ilb_cmd(u_cmd); (void) do_ioctl(&kcmd, 0); } /* current list element failed, so we start with previous one */ irl = list_prev(&ilbd_rule_hlist, irl); while (irl != NULL) { if (is_all_rules) irl->irl_flags |= ILB_FLAGS_RULE_ALLRULES; /* * When the processing of a command consists of * multiple sequential steps, and one of them fails, * ilbd performs rollback to undo the steps taken before the * failing step. Since ilbd is initiating these steps * there is not need to audit them. */ rc = i_ilbd_action_switch(irl, u_cmd, B_TRUE, NULL); irl->irl_flags &= ~ILB_FLAGS_RULE_ALLRULES; irl = list_prev(&ilbd_rule_hlist, irl); } out: return (rc); } ilb_status_t ilbd_destroy_rule(ilbd_name_t rule_name, const struct passwd *ps, ucred_t *ucredp) { return (i_ilbd_rule_action(rule_name, ps, ILBD_DESTROY_RULE, ucredp)); } ilb_status_t ilbd_enable_rule(ilbd_name_t rule_name, const struct passwd *ps, ucred_t *ucredp) { return (i_ilbd_rule_action(rule_name, ps, ILBD_ENABLE_RULE, ucredp)); } ilb_status_t ilbd_disable_rule(ilbd_name_t rule_name, const struct passwd *ps, ucred_t *ucredp) { return (i_ilbd_rule_action(rule_name, ps, ILBD_DISABLE_RULE, ucredp)); } /* * allocate storage for a kernel rule command and fill from * "template" irl, if non-NULL */ static ilb_rule_cmd_t * i_alloc_kernel_rule_cmd(ilbd_rule_t *irl) { ilb_rule_cmd_t *kcmd; kcmd = (ilb_rule_cmd_t *)malloc(sizeof (*kcmd)); if (kcmd == NULL) return (kcmd); bzero(kcmd, sizeof (*kcmd)); if (irl != NULL) { kcmd->flags = irl->irl_flags; kcmd->ip_ver = AF_2_IPPROTO(irl->irl_ipversion); kcmd->vip = irl->irl_vip; kcmd->proto = irl->irl_proto; kcmd->min_port = irl->irl_minport; kcmd->max_port = irl->irl_maxport; kcmd->algo = algo_lib2impl(irl->irl_algo); kcmd->topo = topo_lib2impl(irl->irl_topo); kcmd->sticky_mask = irl->irl_stickymask; kcmd->nat_src_start = irl->irl_nat_src_start; kcmd->nat_src_end = irl->irl_nat_src_end; kcmd->conn_drain_timeout = irl->irl_conndrain; kcmd->nat_expiry = irl->irl_nat_timeout; kcmd->sticky_expiry = irl->irl_sticky_timeout; (void) strlcpy(kcmd->name, irl->irl_name, sizeof (kcmd->name)); } return (kcmd); } /* * ncount is the next to be used index into (*kcmdp)->servers */ static ilb_status_t adjust_srv_info_cmd(ilb_servers_info_cmd_t **kcmdp, int index) { ilb_servers_info_cmd_t *kcmd = *kcmdp; size_t sz; if (kcmd != NULL && kcmd->num_servers > index + 1) return (ILB_STATUS_OK); /* * the first ilb_server_info_t is part of *kcmd, so * by using index (which is one less than the total needed) here, * we allocate exactly the amount we need. */ sz = sizeof (*kcmd) + (index * sizeof (ilb_server_info_t)); kcmd = (ilb_servers_info_cmd_t *)realloc(kcmd, sz); if (kcmd == NULL) return (ILB_STATUS_ENOMEM); /* * we don't count the slot we newly allocated yet. */ kcmd->num_servers = index; *kcmdp = kcmd; return (ILB_STATUS_OK); } /* * this function adds all servers in srvlist to the kernel(!) rule * the name of which is passed as argument. */ static ilb_status_t i_update_ksrv_rules(char *name, ilbd_sg_t *sg, ilbd_rule_t *rl) { ilb_status_t rc; ilbd_srv_t *srvp; ilb_servers_info_cmd_t *kcmd = NULL; int i; /* * If the servergroup doesn't have any servers associated with * it yet, there's nothing more to do here. */ if (sg->isg_srvcount == 0) return (ILB_STATUS_OK); /* * walk the list of servers attached to this SG */ srvp = list_head(&sg->isg_srvlist); for (i = 0; srvp != NULL; srvp = list_next(&sg->isg_srvlist, srvp)) { rc = adjust_srv_info_cmd(&kcmd, i); if (rc != ILB_STATUS_OK) return (rc); ILB_SGSRV_2_KSRV(&srvp->isv_srv, &kcmd->servers[i]); /* * "no port" means "copy rule's port" (for kernel rule) */ if (kcmd->servers[i].min_port == 0) { kcmd->servers[i].min_port = rl->irl_minport; kcmd->servers[i].max_port = rl->irl_maxport; } i++; } kcmd->cmd = ILB_ADD_SERVERS; kcmd->num_servers = i; (void) strlcpy(kcmd->name, name, sizeof (kcmd->name)); rc = do_ioctl(kcmd, 0); if (rc != ILB_STATUS_OK) return (rc); for (i = 0; i < kcmd->num_servers; i++) { int e; if ((e = kcmd->servers[i].err) != 0) { logerr("i_update_ksrv_rules " "ioctl indicates failure: %s", strerror(e)); rc = ilb_map_errno2ilbstat(e); /* * if adding even a single server failed, we need to * roll back the whole wad. We ignore any errors and * return the one that was returned by the first ioctl. */ kcmd->cmd = ILB_DEL_SERVERS; (void) do_ioctl(kcmd, 0); return (rc); } } return (ILB_STATUS_OK); } /* convert a struct in6_addr to valstr */ void ilbd_ip_to_str(uint16_t ipversion, struct in6_addr *addr, char *valstr) { size_t vallen; ilb_ip_addr_t ipaddr; void *addrptr; vallen = (ipversion == AF_INET) ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN; IP_COPY_IMPL_2_CLI(addr, &ipaddr); addrptr = (ipversion == AF_INET) ? (void *)&ipaddr.ia_v4 : (void *)&ipaddr.ia_v6; if (inet_ntop(ipversion, (void *)addrptr, valstr, vallen == NULL)) logerr("ilbd_ip_to_str: inet_ntop failed"); return; } ilb_status_t ilbd_create_rule(ilb_rule_info_t *rl, int ev_port, const struct passwd *ps, ucred_t *ucredp) { ilb_status_t rc; ilbd_rule_t *irl = NULL; ilbd_sg_t *sg; ilb_rule_cmd_t *kcmd = NULL; if (ps != NULL) { if ((rc = ilbd_check_client_config_auth(ps)) != ILB_STATUS_OK) goto out; } if (i_find_rule_byname(rl->rl_name) != NULL) { logdebug("ilbd_create_rule: rule %s" " already exists", rl->rl_name); ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, ILB_STATUS_DUP_RULE, ucredp); return (ILB_STATUS_DUP_RULE); } sg = i_find_sg_byname(rl->rl_sgname); if (sg == NULL) { logdebug("ilbd_create_rule: rule %s uses non-existent" " servergroup name %s", rl->rl_name, rl->rl_sgname); ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, ILB_STATUS_SGUNAVAIL, ucredp); return (ILB_STATUS_SGUNAVAIL); } if ((rc = ilbd_sg_check_rule_port(sg, rl)) != ILB_STATUS_OK) { ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, rc, ucredp); return (rc); } /* allocs and copies contents of arg (if != NULL) into new rule */ irl = i_alloc_ilbd_rule(rl); if (irl == NULL) { ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, ILB_STATUS_ENOMEM, ucredp); return (ILB_STATUS_ENOMEM); } /* make sure rule's IPversion (via vip) and SG's match */ if (sg->isg_srvcount > 0) { ilbd_srv_t *srv = list_head(&sg->isg_srvlist); int32_t r_af = rl->rl_ipversion; int32_t s_af = GET_AF(&srv->isv_addr); if (r_af != s_af) { logdebug("address family mismatch with servergroup"); rc = ILB_STATUS_MISMATCHSG; goto out; } } irl->irl_sg = sg; /* Try associating the rule with the given hc oject. */ if (RULE_HAS_HC(irl)) { if ((rc = ilbd_hc_associate_rule(irl, ev_port)) != ILB_STATUS_OK) goto out; } /* * checks are done, now: * 1. create rule in kernel * 2. tell it about the backend server (which we maintain in SG) * 3. attach the rule in memory */ /* 1. */ /* allocs and copies contents of arg (if != NULL) into new rule */ kcmd = i_alloc_kernel_rule_cmd(irl); if (kcmd == NULL) { rc = ILB_STATUS_ENOMEM; goto rollback_hc; } kcmd->cmd = ILB_CREATE_RULE; rc = do_ioctl(kcmd, 0); if (rc != ILB_STATUS_OK) goto rollback_kcmd; /* 2. */ rc = i_update_ksrv_rules(kcmd->name, sg, irl); if (rc != ILB_STATUS_OK) goto rollback_kcmd; /* 3. */ (void) i_attach_rule2sg(sg, irl); list_insert_tail(&ilbd_rule_hlist, irl); if (ps != NULL) { rc = i_ilbd_save_rule(irl, ILBD_SCF_CREATE); if (rc != ILB_STATUS_OK) goto rollback_rule; } free(kcmd); ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, ILB_STATUS_OK, ucredp); return (ILB_STATUS_OK); rollback_rule: /* * ilbd_destroy_one_rule() also frees irl, as well as dissociate * rule and HC, so all we need to do afterwards is free the kcmd * and return. */ (void) ilbd_destroy_one_rule(irl); ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, rc, ucredp); free(kcmd); return (rc); rollback_kcmd: free(kcmd); rollback_hc: /* Cannot fail since the rule is just associated with the hc object. */ if (RULE_HAS_HC(irl)) (void) ilbd_hc_dissociate_rule(irl); out: ilbd_audit_rule_event(NULL, rl, ILBD_CREATE_RULE, rc, ucredp); free(irl); return (rc); } static uint32_t i_flags_d2k(int f) { uint32_t r = 0; if (ILB_IS_SRV_ENABLED(f)) r |= ILB_SERVER_ENABLED; /* more as they are defined */ return (r); } /* * walk the list of rules and add srv to the *kernel* rule * (this is a list of rules hanging off of a server group) */ ilb_status_t i_add_srv2krules(list_t *rlist, ilb_sg_srv_t *srv, int ev_port) { ilb_status_t rc = ILB_STATUS_OK; ilbd_rule_t *rl, *del_rl; ilb_servers_info_cmd_t kcmd; ilb_servers_cmd_t del_kcmd; kcmd.cmd = ILB_ADD_SERVERS; kcmd.num_servers = 1; kcmd.servers[0].err = 0; kcmd.servers[0].addr = srv->sgs_addr; kcmd.servers[0].flags = i_flags_d2k(srv->sgs_flags); (void) strlcpy(kcmd.servers[0].name, srv->sgs_srvID, sizeof (kcmd.servers[0].name)); /* * a note about rollback: since we need to start rollback with the * current list element in some case, and with the previous one * in others, we must "go back" in this latter case before * we jump to the rollback code. */ for (rl = list_head(rlist); rl != NULL; rl = list_next(rlist, rl)) { (void) strlcpy(kcmd.name, rl->irl_name, sizeof (kcmd.name)); /* * sgs_minport == 0 means "no port specified"; this * indicates that the server matches anything the rule * provides. * NOTE: this can be different for different rules * using the same server group, therefore we don't modify * this information in the servergroup, but *only* in * the kernel's rule. */ if (srv->sgs_minport == 0) { kcmd.servers[0].min_port = rl->irl_minport; kcmd.servers[0].max_port = rl->irl_maxport; } else { kcmd.servers[0].min_port = srv->sgs_minport; kcmd.servers[0].max_port = srv->sgs_maxport; } rc = do_ioctl((void *)&kcmd, 0); if (rc != ILB_STATUS_OK) { logdebug("i_add_srv2krules: do_ioctl call failed"); del_rl = list_prev(rlist, rl); goto rollback; } /* * if ioctl() returns != 0, it doesn't perform the copyout * necessary to indicate *which* server failed (we could be * adding more than one); therefore we must check this * 'err' field even if ioctl() returns 0. */ if (kcmd.servers[0].err != 0) { logerr("i_add_srv2krules: SIOCILB ioctl returned" " error %d", kcmd.servers[0].err); rc = ilb_map_errno2ilbstat(kcmd.servers[0].err); del_rl = list_prev(rlist, rl); goto rollback; } if (RULE_HAS_HC(rl)) { if ((rc = ilbd_hc_add_server(rl, srv, ev_port)) != ILB_STATUS_OK) { logerr("i_add_srv2krules: cannot start timer " " for rules %s server %s", rl->irl_name, srv->sgs_srvID); del_rl = rl; goto rollback; } } } return (rc); rollback: /* * this is almost, but not quite, the same as i_rem_srv_frm_krules() * therefore we keep it seperate. */ del_kcmd.cmd = ILB_DEL_SERVERS; del_kcmd.num_servers = 1; del_kcmd.servers[0].addr = srv->sgs_addr; while (del_rl != NULL) { if (RULE_HAS_HC(del_rl)) (void) ilbd_hc_del_server(del_rl, srv); (void) strlcpy(del_kcmd.name, del_rl->irl_name, sizeof (del_kcmd.name)); (void) do_ioctl((void *)&del_kcmd, 0); del_rl = list_prev(rlist, del_rl); } return (rc); } /* * ev_port is only used for rollback purposes in this function */ ilb_status_t i_rem_srv_frm_krules(list_t *rlist, ilb_sg_srv_t *srv, int ev_port) { ilb_status_t rc = ILB_STATUS_OK; ilbd_rule_t *rl, *add_rl; ilb_servers_cmd_t kcmd; ilb_servers_info_cmd_t add_kcmd; kcmd.cmd = ILB_DEL_SERVERS; kcmd.num_servers = 1; kcmd.servers[0].err = 0; kcmd.servers[0].addr = srv->sgs_addr; for (rl = list_head(rlist); rl != NULL; rl = list_next(rlist, rl)) { (void) strlcpy(kcmd.name, rl->irl_name, sizeof (kcmd.name)); rc = do_ioctl((void *)&kcmd, 0); if (rc != ILB_STATUS_OK) { logdebug("i_rem_srv_frm_krules: do_ioctl" "call failed"); add_rl = list_prev(rlist, rl); goto rollback; } /* * if ioctl() returns != 0, it doesn't perform the copyout * necessary to indicate *which* server failed (we could be * removing more than one); therefore we must check this * 'err' field even if ioctl() returns 0. */ if (kcmd.servers[0].err != 0) { logerr("i_rem_srv_frm_krules: SIOCILB ioctl" " returned error %s", strerror(kcmd.servers[0].err)); rc = ilb_map_errno2ilbstat(kcmd.servers[0].err); add_rl = list_prev(rlist, rl); goto rollback; } if (RULE_HAS_HC(rl) && (rc = ilbd_hc_del_server(rl, srv)) != ILB_STATUS_OK) { logerr("i_rem_srv_frm_krules: cannot delete " "timer for rules %s server %s", rl->irl_name, srv->sgs_srvID); add_rl = rl; goto rollback; } } return (rc); rollback: /* Don't do roll back if ev_port == -1. */ if (ev_port == -1) return (rc); add_kcmd.cmd = ILB_ADD_SERVERS; add_kcmd.num_servers = 1; add_kcmd.servers[0].err = 0; add_kcmd.servers[0].addr = srv->sgs_addr; add_kcmd.servers[0].flags = i_flags_d2k(srv->sgs_flags); (void) strlcpy(add_kcmd.servers[0].name, srv->sgs_srvID, sizeof (add_kcmd.servers[0].name)); while (add_rl != NULL) { if (srv->sgs_minport == 0) { add_kcmd.servers[0].min_port = add_rl->irl_minport; add_kcmd.servers[0].max_port = add_rl->irl_maxport; } else { add_kcmd.servers[0].min_port = srv->sgs_minport; add_kcmd.servers[0].max_port = srv->sgs_maxport; } if (RULE_HAS_HC(add_rl)) (void) ilbd_hc_add_server(add_rl, srv, ev_port); (void) strlcpy(add_kcmd.name, add_rl->irl_name, sizeof (add_kcmd.name)); (void) do_ioctl((void *)&add_kcmd, 0); add_rl = list_prev(rlist, add_rl); } return (rc); }