/* * 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 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #include #include #include #include #include #include #define _SUN_TPI_VERSION 2 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * This is a transport provider for routing sockets. Downstream messages are * wrapped with a IP_IOCTL header, and ip_wput_ioctl calls the appropriate entry * in the ip_ioctl_ftbl callout table to pass the routing socket data into IP. * Upstream messages are generated for listeners of the routing socket as well * as the message sender (unless they have turned off their end using * SO_USELOOPBACK or shutdown(3n)). Upstream messages may also be generated * asynchronously when: * * Interfaces are brought up or down. * Addresses are assigned to interfaces. * ICMP redirects are processed and a IRE_HOST_REDIRECT is installed. * No route is found while sending a packet. * When TCP requests IP to remove an IRE_CACHE of a troubled destination. * * Since all we do is reformat the messages between routing socket and * ioctl forms, no synchronization is necessary in this module; all * the dirty work is done down in ip. */ /* * RTS stack instances */ struct rts_stack { netstack_t *rtss_netstack; /* Common netstack */ caddr_t rtss_g_nd; struct rtsparam_s *rtss_params; }; typedef struct rts_stack rts_stack_t; /* * Object to represent database of options to search passed to * {sock,tpi}optcom_req() interface routine to take care of option * management and associated methods. * XXX. These and other externs should really move to a rts header. */ extern optdb_obj_t rts_opt_obj; extern uint_t rts_max_optsize; /* Internal routing socket stream control structure, one per open stream */ typedef struct rts_s { cred_t *rts_credp; /* Opener's credentials */ uint_t rts_state; /* Provider interface state */ uint_t rts_error; /* Routing socket error code */ uint_t rts_flag; /* Pending I/O state */ uint_t rts_proto; /* SO_PROTOTYPE "socket" option. */ uint_t rts_debug : 1, /* SO_DEBUG "socket" option. */ rts_dontroute : 1, /* SO_DONTROUTE "socket" option. */ rts_broadcast : 1, /* SO_BROADCAST "socket" option. */ rts_reuseaddr : 1, /* SO_REUSEADDR "socket" option. */ rts_useloopback : 1, /* SO_USELOOPBACK "socket" option. */ rts_multicast_loop : 1, /* IP_MULTICAST_LOOP option */ rts_hdrincl : 1, /* IP_HDRINCL option + RAW and IGMP */ : 0; rts_stack_t *rts_rtss; } rts_t; #define RTS_WPUT_PENDING 0x1 /* Waiting for write-side to complete */ #define RTS_WRW_PENDING 0x2 /* Routing socket write in progress */ #define RTS_OPEN_PENDING 0x4 /* Routing socket open in progress */ /* Default structure copied into T_INFO_ACK messages */ static struct T_info_ack rts_g_t_info_ack = { T_INFO_ACK, T_INFINITE, /* TSDU_size. Maximum size messages. */ T_INVALID, /* ETSDU_size. No expedited data. */ T_INVALID, /* CDATA_size. No connect data. */ T_INVALID, /* DDATA_size. No disconnect data. */ 0, /* ADDR_size. */ 0, /* OPT_size - not initialized here */ 64 * 1024, /* TIDU_size. rts allows maximum size messages. */ T_COTS, /* SERV_type. rts supports connection oriented. */ TS_UNBND, /* CURRENT_state. This is set from rts_state. */ (XPG4_1) /* PROVIDER_flag */ }; /* Named Dispatch Parameter Management Structure */ typedef struct rtsparam_s { uint_t rts_param_min; uint_t rts_param_max; uint_t rts_param_value; char *rts_param_name; } rtsparam_t; /* * Table of ND variables supported by rts. These are loaded into rts_g_nd * in rts_open. * All of these are alterable, within the min/max values given, at run time. */ static rtsparam_t lcl_param_arr[] = { /* min max value name */ { 4096, 65536, 8192, "rts_xmit_hiwat"}, { 0, 65536, 1024, "rts_xmit_lowat"}, { 4096, 65536, 8192, "rts_recv_hiwat"}, { 65536, 1024*1024*1024, 256*1024, "rts_max_buf"}, }; #define rtss_xmit_hiwat rtss_params[0].rts_param_value #define rtss_xmit_lowat rtss_params[1].rts_param_value #define rtss_recv_hiwat rtss_params[2].rts_param_value #define rtss_max_buf rtss_params[3].rts_param_value static int rts_close(queue_t *q); static void rts_err_ack(queue_t *q, mblk_t *mp, t_scalar_t t_error, int sys_error); static mblk_t *rts_ioctl_alloc(mblk_t *data, cred_t *cr); static int rts_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp); int rts_opt_default(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr); int rts_opt_get(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr); int rts_opt_set(queue_t *q, uint_t optset_context, int level, int name, uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, void *thisdg_attrs, cred_t *cr, mblk_t *mblk); static void rts_param_cleanup(IDP *ndp); static int rts_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr); static boolean_t rts_param_register(IDP *ndp, rtsparam_t *rtspa, int cnt); static int rts_param_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr); static void rts_rput(queue_t *q, mblk_t *mp); static void *rts_stack_init(netstackid_t stackid, netstack_t *ns); static void rts_stack_fini(netstackid_t stackid, void *arg); static void rts_wput(queue_t *q, mblk_t *mp); static void rts_wput_iocdata(queue_t *q, mblk_t *mp); static void rts_wput_other(queue_t *q, mblk_t *mp); static int rts_wrw(queue_t *q, struiod_t *dp); static struct module_info info = { 129, "rts", 1, INFPSZ, 512, 128 }; static struct qinit rinit = { (pfi_t)rts_rput, NULL, rts_open, rts_close, NULL, &info }; static struct qinit winit = { (pfi_t)rts_wput, NULL, NULL, NULL, NULL, &info, NULL, (pfi_t)rts_wrw, NULL, STRUIOT_STANDARD }; struct streamtab rtsinfo = { &rinit, &winit }; /* * This routine allocates the necessary * message blocks for IOCTL wrapping the * user data. */ static mblk_t * rts_ioctl_alloc(mblk_t *data, cred_t *cr) { mblk_t *mp = NULL; mblk_t *mp1 = NULL; ipllc_t *ipllc; struct iocblk *ioc; mp = allocb_cred(sizeof (ipllc_t), cr); if (mp == NULL) return (NULL); mp1 = allocb_cred(sizeof (struct iocblk), cr); if (mp1 == NULL) { freeb(mp); return (NULL); } ipllc = (ipllc_t *)mp->b_rptr; ipllc->ipllc_cmd = IP_IOC_RTS_REQUEST; ipllc->ipllc_name_offset = 0; ipllc->ipllc_name_length = 0; mp->b_wptr += sizeof (ipllc_t); mp->b_cont = data; ioc = (struct iocblk *)mp1->b_rptr; ioc->ioc_cmd = IP_IOCTL; ioc->ioc_error = 0; ioc->ioc_cr = NULL; ioc->ioc_count = msgdsize(mp); mp1->b_wptr += sizeof (struct iocblk); mp1->b_datap->db_type = M_IOCTL; mp1->b_cont = mp; return (mp1); } /* * This routine closes rts stream, by disabling * put/srv routines and freeing the this module * internal datastructure. */ static int rts_close(queue_t *q) { rts_t *rts = (rts_t *)q->q_ptr; qprocsoff(q); crfree(rts->rts_credp); netstack_rele(rts->rts_rtss->rtss_netstack); mi_free(q->q_ptr); return (0); } /* * This is the open routine for routing socket. It allocates * rts_t structure for the stream and sends an IOCTL to * the down module to indicate that it is a routing socket * stream. */ /* ARGSUSED */ static int rts_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { mblk_t *mp = NULL; rts_t *rts; netstack_t *ns; rts_stack_t *rtss; /* If the stream is already open, return immediately. */ if (q->q_ptr != NULL) return (0); /* If this is not a push of rts as a module, fail. */ if (sflag != MODOPEN) return (EINVAL); ns = netstack_find_by_cred(credp); ASSERT(ns != NULL); rtss = ns->netstack_rts; ASSERT(rtss != NULL); q->q_ptr = mi_zalloc_sleep(sizeof (rts_t)); WR(q)->q_ptr = q->q_ptr; rts = (rts_t *)q->q_ptr; rts->rts_rtss = rtss; rts->rts_credp = credp; crhold(credp); /* * The receive hiwat is only looked at on the stream head queue. * Store in q_hiwat in order to return on SO_RCVBUF getsockopts. */ q->q_hiwat = rtss->rtss_recv_hiwat; /* * The transmit hiwat/lowat is only looked at on IP's queue. * Store in q_hiwat/q_lowat in order to return on SO_SNDBUF/SO_SNDLOWAT * getsockopts. */ WR(q)->q_hiwat = rtss->rtss_xmit_hiwat; WR(q)->q_lowat = rtss->rtss_xmit_lowat; qprocson(q); /* * Indicate the down IP module that this is a routing socket * client by sending an RTS IOCTL without any user data. Although * this is just a notification message (without any real routing * request), we pass in any credential for correctness sake. */ mp = rts_ioctl_alloc(NULL, credp); if (mp == NULL) { qprocsoff(q); ASSERT(q->q_ptr != NULL); netstack_rele(rtss->rtss_netstack); mi_free(q->q_ptr); crfree(credp); return (ENOMEM); } rts->rts_flag |= RTS_OPEN_PENDING; putnext(WR(q), mp); while (rts->rts_flag & RTS_OPEN_PENDING) { if (!qwait_sig(q)) { (void) rts_close(q); return (EINTR); } } if (rts->rts_error != 0) { (void) rts_close(q); return (ENOTSUP); } rts->rts_state = TS_UNBND; return (0); } /* * This routine creates a T_ERROR_ACK message and passes it upstream. */ static void rts_err_ack(queue_t *q, mblk_t *mp, t_scalar_t t_error, int sys_error) { if ((mp = mi_tpi_err_ack_alloc(mp, t_error, sys_error)) != NULL) qreply(q, mp); } /* * This routine creates a T_OK_ACK message and passes it upstream. */ static void rts_ok_ack(queue_t *q, mblk_t *mp) { if ((mp = mi_tpi_ok_ack_alloc(mp)) != NULL) qreply(q, mp); } /* * This routine is called by rts_wput to handle T_UNBIND_REQ messages. * After some error checking, the message is passed downstream to ip. */ static void rts_unbind(queue_t *q, mblk_t *mp) { rts_t *rts; rts = (rts_t *)q->q_ptr; /* If a bind has not been done, we can't unbind. */ if (rts->rts_state != TS_IDLE) { rts_err_ack(q, mp, TOUTSTATE, 0); return; } rts->rts_state = TS_UNBND; rts_ok_ack(q, mp); } /* * This routine is called to handle each * O_T_BIND_REQ/T_BIND_REQ message passed to * rts_wput. Note: This routine works with both * O_T_BIND_REQ and T_BIND_REQ semantics. */ static void rts_bind(queue_t *q, mblk_t *mp) { mblk_t *mp1; struct T_bind_req *tbr; rts_t *rts; rts = (rts_t *)q->q_ptr; if ((mp->b_wptr - mp->b_rptr) < sizeof (*tbr)) { (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "rts_bind: bad data, %d", rts->rts_state); rts_err_ack(q, mp, TBADADDR, 0); return; } if (rts->rts_state != TS_UNBND) { (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "rts_bind: bad state, %d", rts->rts_state); rts_err_ack(q, mp, TOUTSTATE, 0); return; } /* * Reallocate the message to make sure we have enough room for an * address and the protocol type. */ mp1 = reallocb(mp, sizeof (struct T_bind_ack) + sizeof (sin_t), 1); if (mp1 == NULL) { rts_err_ack(q, mp, TSYSERR, ENOMEM); return; } mp = mp1; tbr = (struct T_bind_req *)mp->b_rptr; if (tbr->ADDR_length != 0) { (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "rts_bind: bad ADDR_length %d", tbr->ADDR_length); rts_err_ack(q, mp, TBADADDR, 0); return; } /* Generic request */ tbr->ADDR_offset = (t_scalar_t)sizeof (struct T_bind_req); tbr->ADDR_length = 0; tbr->PRIM_type = T_BIND_ACK; rts->rts_state = TS_IDLE; qreply(q, mp); } static void rts_copy_info(struct T_info_ack *tap, rts_t *rts) { *tap = rts_g_t_info_ack; tap->CURRENT_state = rts->rts_state; tap->OPT_size = rts_max_optsize; } /* * This routine responds to T_CAPABILITY_REQ messages. It is called by * rts_wput. Much of the T_CAPABILITY_ACK information is copied from * rts_g_t_info_ack. The current state of the stream is copied from * rts_state. */ static void rts_capability_req(queue_t *q, mblk_t *mp) { rts_t *rts = (rts_t *)q->q_ptr; t_uscalar_t cap_bits1; struct T_capability_ack *tcap; cap_bits1 = ((struct T_capability_req *)mp->b_rptr)->CAP_bits1; mp = tpi_ack_alloc(mp, sizeof (struct T_capability_ack), mp->b_datap->db_type, T_CAPABILITY_ACK); if (mp == NULL) return; tcap = (struct T_capability_ack *)mp->b_rptr; tcap->CAP_bits1 = 0; if (cap_bits1 & TC1_INFO) { rts_copy_info(&tcap->INFO_ack, rts); tcap->CAP_bits1 |= TC1_INFO; } qreply(q, mp); } /* * This routine responds to T_INFO_REQ messages. It is called by rts_wput. * Most of the T_INFO_ACK information is copied from rts_g_t_info_ack. * The current state of the stream is copied from rts_state. */ static void rts_info_req(queue_t *q, mblk_t *mp) { rts_t *rts = (rts_t *)q->q_ptr; mp = tpi_ack_alloc(mp, sizeof (rts_g_t_info_ack), M_PCPROTO, T_INFO_ACK); if (mp == NULL) return; rts_copy_info((struct T_info_ack *)mp->b_rptr, rts); qreply(q, mp); } /* * This routine gets default values of certain options whose default * values are maintained by protcol specific code */ /* ARGSUSED */ int rts_opt_default(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr) { /* no default value processed by protocol specific code currently */ return (-1); } /* * This routine retrieves the current status of socket options. * It returns the size of the option retrieved. */ int rts_opt_get(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr) { int *i1 = (int *)ptr; rts_t *rts = (rts_t *)q->q_ptr; switch (level) { case SOL_SOCKET: switch (name) { case SO_DEBUG: *i1 = rts->rts_debug; break; case SO_REUSEADDR: *i1 = rts->rts_reuseaddr; break; case SO_TYPE: *i1 = SOCK_RAW; break; /* * The following three items are available here, * but are only meaningful to IP. */ case SO_DONTROUTE: *i1 = rts->rts_dontroute; break; case SO_USELOOPBACK: *i1 = rts->rts_useloopback; break; case SO_BROADCAST: *i1 = rts->rts_broadcast; break; case SO_PROTOTYPE: *i1 = rts->rts_proto; break; /* * The following two items can be manipulated, * but changing them should do nothing. */ case SO_SNDBUF: ASSERT(q->q_hiwat <= INT_MAX); *i1 = (int)(q->q_hiwat); break; case SO_RCVBUF: ASSERT(q->q_hiwat <= INT_MAX); *i1 = (int)(RD(q)->q_hiwat); break; case SO_DOMAIN: *i1 = PF_ROUTE; break; default: return (-1); } break; default: return (-1); } return ((int)sizeof (int)); } /* * This routine sets socket options. */ /*ARGSUSED*/ int rts_opt_set(queue_t *q, uint_t optset_context, int level, int name, uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, void *thisdg_attrs, cred_t *cr, mblk_t *mblk) { int *i1 = (int *)invalp; rts_t *rts = (rts_t *)q->q_ptr; boolean_t checkonly; rts_stack_t *rtss = rts->rts_rtss; switch (optset_context) { case SETFN_OPTCOM_CHECKONLY: checkonly = B_TRUE; /* * Note: Implies T_CHECK semantics for T_OPTCOM_REQ * inlen != 0 implies value supplied and * we have to "pretend" to set it. * inlen == 0 implies that there is no * value part in T_CHECK request and just validation * done elsewhere should be enough, we just return here. */ if (inlen == 0) { *outlenp = 0; return (0); } break; case SETFN_OPTCOM_NEGOTIATE: checkonly = B_FALSE; break; case SETFN_UD_NEGOTIATE: case SETFN_CONN_NEGOTIATE: checkonly = B_FALSE; /* * Negotiating local and "association-related" options * through T_UNITDATA_REQ or T_CONN_{REQ,CON} * Not allowed in this module. */ return (EINVAL); default: /* * We should never get here */ *outlenp = 0; return (EINVAL); } ASSERT((optset_context != SETFN_OPTCOM_CHECKONLY) || (optset_context == SETFN_OPTCOM_CHECKONLY && inlen != 0)); /* * For rts, we should have no ancillary data sent down * (rts_wput doesn't handle options). */ ASSERT(thisdg_attrs == NULL); /* * For fixed length options, no sanity check * of passed in length is done. It is assumed *_optcom_req() * routines do the right thing. */ switch (level) { case SOL_SOCKET: switch (name) { case SO_REUSEADDR: if (!checkonly) rts->rts_reuseaddr = *i1; break; /* goto sizeof (int) option return */ case SO_DEBUG: if (!checkonly) rts->rts_debug = *i1; break; /* goto sizeof (int) option return */ /* * The following three items are available here, * but are only meaningful to IP. */ case SO_DONTROUTE: if (!checkonly) rts->rts_dontroute = *i1; break; /* goto sizeof (int) option return */ case SO_USELOOPBACK: if (!checkonly) rts->rts_useloopback = *i1; break; /* goto sizeof (int) option return */ case SO_BROADCAST: if (!checkonly) rts->rts_broadcast = *i1; break; /* goto sizeof (int) option return */ case SO_PROTOTYPE: /* * Routing socket applications that call socket() with * a third argument can filter which messages will be * sent upstream thanks to sockfs. so_socket() sends * down the SO_PROTOTYPE and rts_queue_input() * implements the filtering. */ if (*i1 != AF_INET && *i1 != AF_INET6) return (EPROTONOSUPPORT); if (!checkonly) rts->rts_proto = *i1; break; /* goto sizeof (int) option return */ /* * The following two items can be manipulated, * but changing them should do nothing. */ case SO_SNDBUF: if (*i1 > rtss->rtss_max_buf) { *outlenp = 0; return (ENOBUFS); } if (!checkonly) { q->q_hiwat = *i1; q->q_next->q_hiwat = *i1; } break; /* goto sizeof (int) option return */ case SO_RCVBUF: if (*i1 > rtss->rtss_max_buf) { *outlenp = 0; return (ENOBUFS); } if (!checkonly) { RD(q)->q_hiwat = *i1; (void) mi_set_sth_hiwat(RD(q), *i1); } break; /* goto sizeof (int) option return */ default: *outlenp = 0; return (EINVAL); } break; default: *outlenp = 0; return (EINVAL); } /* * Common case of return from an option that is sizeof (int) */ *(int *)outvalp = *i1; *outlenp = (t_uscalar_t)sizeof (int); return (0); } /* * This routine frees the ND table if all streams have been closed. * It is called by rts_close and rts_open. */ static void rts_param_cleanup(IDP *ndp) { nd_free(ndp); } /* * This routine retrieves the value of an ND variable in a rtsparam_t * structure. It is called through nd_getset when a user reads the * variable. */ /* ARGSUSED */ static int rts_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) { rtsparam_t *rtspa = (rtsparam_t *)cp; (void) mi_mpprintf(mp, "%u", rtspa->rts_param_value); return (0); } /* * Walk through the param array specified registering each element with the * named dispatch (ND) handler. */ static boolean_t rts_param_register(IDP *ndp, rtsparam_t *rtspa, int cnt) { for (; cnt-- > 0; rtspa++) { if (rtspa->rts_param_name != NULL && rtspa->rts_param_name[0]) { if (!nd_load(ndp, rtspa->rts_param_name, rts_param_get, rts_param_set, (caddr_t)rtspa)) { nd_free(ndp); return (B_FALSE); } } } return (B_TRUE); } /* This routine sets an ND variable in a rtsparam_t structure. */ /* ARGSUSED */ static int rts_param_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr) { ulong_t new_value; rtsparam_t *rtspa = (rtsparam_t *)cp; /* * Fail the request if the new value does not lie within the * required bounds. */ if (ddi_strtoul(value, NULL, 10, &new_value) != 0 || new_value < rtspa->rts_param_min || new_value > rtspa->rts_param_max) { return (EINVAL); } /* Set the new value */ rtspa->rts_param_value = new_value; return (0); } /* * This routine handles synchronous messages passed downstream. It either * consumes the message or passes it downstream; it never queues a * a message. The data messages that go down are wrapped in an IOCTL * message. * * Since it is synchronous, it waits for the M_IOCACK/M_IOCNAK so that * it can return an immediate error (such as ENETUNREACH when adding a route). * It uses the RTS_WRW_PENDING to ensure that each rts instance has only * one M_IOCTL outstanding at any given time. */ static int rts_wrw(queue_t *q, struiod_t *dp) { mblk_t *mp = dp->d_mp; mblk_t *mp1; int error; rt_msghdr_t *rtm; rts_t *rts; rts = (rts_t *)q->q_ptr; while (rts->rts_flag & RTS_WRW_PENDING) { if (qwait_rw(q)) { rts->rts_error = EINTR; goto err_ret; } } rts->rts_flag |= RTS_WRW_PENDING; if (isuioq(q) && (error = struioget(q, mp, dp, 0))) { /* * Uio error of some sort, so just return the error. */ rts->rts_error = error; goto err_ret; } /* * Pass the mblk (chain) onto wput(). */ dp->d_mp = 0; switch (mp->b_datap->db_type) { case M_PROTO: case M_PCPROTO: /* Expedite other than T_DATA_REQ to below the switch */ if (((mp->b_wptr - mp->b_rptr) != sizeof (struct T_data_req)) || (((union T_primitives *)mp->b_rptr)->type != T_DATA_REQ)) break; if ((mp1 = mp->b_cont) == NULL) { rts->rts_error = EINVAL; goto err_ret; } freeb(mp); mp = mp1; /* FALLTHRU */ case M_DATA: /* * The semantics of the routing socket is such that the rtm_pid * field is automatically filled in during requests with the * current process' pid. We do this here (where we still have * user context) after checking we have at least a message the * size of a routing message header. */ if ((mp->b_wptr - mp->b_rptr) < sizeof (rt_msghdr_t)) { if (!pullupmsg(mp, sizeof (rt_msghdr_t))) { rts->rts_error = EINVAL; goto err_ret; } } rtm = (rt_msghdr_t *)mp->b_rptr; rtm->rtm_pid = curproc->p_pid; break; default: break; } rts->rts_flag |= RTS_WPUT_PENDING; rts_wput(q, mp); while (rts->rts_flag & RTS_WPUT_PENDING) if (qwait_rw(q)) { /* RTS_WPUT_PENDING will be cleared below */ rts->rts_error = EINTR; break; } err_ret: rts->rts_flag &= ~(RTS_WPUT_PENDING | RTS_WRW_PENDING); return (rts->rts_error); } /* * This routine handles all messages passed downstream. It either * consumes the message or passes it downstream; it never queues a * a message. The data messages that go down are wrapped in an IOCTL * message. */ static void rts_wput(queue_t *q, mblk_t *mp) { uchar_t *rptr = mp->b_rptr; mblk_t *mp1; switch (mp->b_datap->db_type) { case M_DATA: break; case M_PROTO: case M_PCPROTO: if ((mp->b_wptr - rptr) == sizeof (struct T_data_req)) { /* Expedite valid T_DATA_REQ to below the switch */ if (((union T_primitives *)rptr)->type == T_DATA_REQ) { mp1 = mp->b_cont; freeb(mp); if (mp1 == NULL) return; mp = mp1; break; } } /* FALLTHRU */ default: rts_wput_other(q, mp); return; } mp1 = rts_ioctl_alloc(mp, DB_CRED(mp)); if (mp1 == NULL) { rts_t *rts = (rts_t *)q->q_ptr; ASSERT(rts != NULL); freemsg(mp); if (rts->rts_flag & RTS_WPUT_PENDING) { rts->rts_error = ENOMEM; rts->rts_flag &= ~RTS_WPUT_PENDING; } return; } putnext(q, mp1); } /* * Handles all the control message, if it * can not understand it, it will * pass down stream. */ static void rts_wput_other(queue_t *q, mblk_t *mp) { uchar_t *rptr = mp->b_rptr; rts_t *rts; struct iocblk *iocp; cred_t *cr; rts_stack_t *rtss; rts = (rts_t *)q->q_ptr; rtss = rts->rts_rtss; cr = DB_CREDDEF(mp, rts->rts_credp); switch (mp->b_datap->db_type) { case M_PROTO: case M_PCPROTO: if ((mp->b_wptr - rptr) < sizeof (t_scalar_t)) { /* * If the message does not contain a PRIM_type, * throw it away. */ freemsg(mp); return; } switch (((union T_primitives *)rptr)->type) { case T_BIND_REQ: case O_T_BIND_REQ: rts_bind(q, mp); return; case T_UNBIND_REQ: rts_unbind(q, mp); return; case T_CAPABILITY_REQ: rts_capability_req(q, mp); return; case T_INFO_REQ: rts_info_req(q, mp); return; case T_SVR4_OPTMGMT_REQ: (void) svr4_optcom_req(q, mp, cr, &rts_opt_obj); return; case T_OPTMGMT_REQ: (void) tpi_optcom_req(q, mp, cr, &rts_opt_obj); return; case O_T_CONN_RES: case T_CONN_RES: case T_DISCON_REQ: /* Not supported by rts. */ rts_err_ack(q, mp, TNOTSUPPORT, 0); return; case T_DATA_REQ: case T_EXDATA_REQ: case T_ORDREL_REQ: /* Illegal for rts. */ freemsg(mp); (void) putnextctl1(RD(q), M_ERROR, EPROTO); return; default: break; } break; case M_IOCTL: iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { case ND_SET: case ND_GET: if (nd_getset(q, rtss->rtss_g_nd, mp)) { qreply(q, mp); return; } break; case TI_GETPEERNAME: mi_copyin(q, mp, NULL, SIZEOF_STRUCT(strbuf, iocp->ioc_flag)); return; default: break; } case M_IOCDATA: rts_wput_iocdata(q, mp); return; default: break; } putnext(q, mp); } /* * Called by rts_wput_other to handle all M_IOCDATA messages. */ static void rts_wput_iocdata(queue_t *q, mblk_t *mp) { struct sockaddr *rtsaddr; mblk_t *mp1; STRUCT_HANDLE(strbuf, sb); struct iocblk *iocp = (struct iocblk *)mp->b_rptr; /* Make sure it is one of ours. */ switch (iocp->ioc_cmd) { case TI_GETPEERNAME: break; default: putnext(q, mp); return; } switch (mi_copy_state(q, mp, &mp1)) { case -1: return; case MI_COPY_CASE(MI_COPY_IN, 1): break; case MI_COPY_CASE(MI_COPY_OUT, 1): /* Copy out the strbuf. */ mi_copyout(q, mp); return; case MI_COPY_CASE(MI_COPY_OUT, 2): /* All done. */ mi_copy_done(q, mp, 0); return; default: mi_copy_done(q, mp, EPROTO); return; } STRUCT_SET_HANDLE(sb, iocp->ioc_flag, (void *)mp1->b_rptr); if (STRUCT_FGET(sb, maxlen) < (int)sizeof (sin_t)) { mi_copy_done(q, mp, EINVAL); return; } switch (iocp->ioc_cmd) { case TI_GETPEERNAME: break; default: mi_copy_done(q, mp, EPROTO); return; } mp1 = mi_copyout_alloc(q, mp, STRUCT_FGETP(sb, buf), sizeof (sin_t), B_TRUE); if (mp1 == NULL) return; STRUCT_FSET(sb, len, (int)sizeof (sin_t)); rtsaddr = (struct sockaddr *)mp1->b_rptr; mp1->b_wptr = (uchar_t *)&rtsaddr[1]; bzero(rtsaddr, sizeof (struct sockaddr)); rtsaddr->sa_family = AF_ROUTE; /* Copy out the address */ mi_copyout(q, mp); } static void rts_rput(queue_t *q, mblk_t *mp) { rts_t *rts; struct iocblk *iocp; mblk_t *mp1; struct T_data_ind *tdi; rts = (rts_t *)q->q_ptr; switch (mp->b_datap->db_type) { case M_IOCACK: case M_IOCNAK: iocp = (struct iocblk *)mp->b_rptr; if (rts->rts_flag & (RTS_WPUT_PENDING|RTS_OPEN_PENDING)) { if (rts->rts_flag & RTS_WPUT_PENDING) rts->rts_flag &= ~RTS_WPUT_PENDING; else rts->rts_flag &= ~RTS_OPEN_PENDING; rts->rts_error = iocp->ioc_error; freemsg(mp); return; } break; case M_DATA: /* * Prepend T_DATA_IND to prevent the stream head from * consolidating multiple messages together. * If the allocation fails just send up the M_DATA. */ mp1 = allocb(sizeof (*tdi), BPRI_MED); if (mp1 != NULL) { mp1->b_cont = mp; mp = mp1; mp->b_datap->db_type = M_PROTO; mp->b_wptr += sizeof (*tdi); tdi = (struct T_data_ind *)mp->b_rptr; tdi->PRIM_type = T_DATA_IND; tdi->MORE_flag = 0; } break; default: break; } putnext(q, mp); } void rts_ddi_init(void) { rts_max_optsize = optcom_max_optsize(rts_opt_obj.odb_opt_des_arr, rts_opt_obj.odb_opt_arr_cnt); /* * We want to be informed each time a stack is created or * destroyed in the kernel, so we can maintain the * set of rts_stack_t's. */ netstack_register(NS_RTS, rts_stack_init, NULL, rts_stack_fini); } void rts_ddi_destroy(void) { netstack_unregister(NS_RTS); } /* * Initialize the RTS stack instance. */ /* ARGSUSED */ static void * rts_stack_init(netstackid_t stackid, netstack_t *ns) { rts_stack_t *rtss; rtsparam_t *pa; rtss = (rts_stack_t *)kmem_zalloc(sizeof (*rtss), KM_SLEEP); rtss->rtss_netstack = ns; pa = (rtsparam_t *)kmem_alloc(sizeof (lcl_param_arr), KM_SLEEP); rtss->rtss_params = pa; bcopy(lcl_param_arr, rtss->rtss_params, sizeof (lcl_param_arr)); (void) rts_param_register(&rtss->rtss_g_nd, rtss->rtss_params, A_CNT(lcl_param_arr)); return (rtss); } /* * Free the RTS stack instance. */ /* ARGSUSED */ static void rts_stack_fini(netstackid_t stackid, void *arg) { rts_stack_t *rtss = (rts_stack_t *)arg; rts_param_cleanup(&rtss->rtss_g_nd); kmem_free(rtss->rtss_params, sizeof (lcl_param_arr)); rtss->rtss_params = NULL; kmem_free(rtss, sizeof (*rtss)); }