xref: /illumos-gate/usr/src/lib/libilb/common/ilb_nat.c (revision dbed73cb)
1*dbed73cbSSangeeta Misra /*
2*dbed73cbSSangeeta Misra  * CDDL HEADER START
3*dbed73cbSSangeeta Misra  *
4*dbed73cbSSangeeta Misra  * The contents of this file are subject to the terms of the
5*dbed73cbSSangeeta Misra  * Common Development and Distribution License (the "License").
6*dbed73cbSSangeeta Misra  * You may not use this file except in compliance with the License.
7*dbed73cbSSangeeta Misra  *
8*dbed73cbSSangeeta Misra  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*dbed73cbSSangeeta Misra  * or http://www.opensolaris.org/os/licensing.
10*dbed73cbSSangeeta Misra  * See the License for the specific language governing permissions
11*dbed73cbSSangeeta Misra  * and limitations under the License.
12*dbed73cbSSangeeta Misra  *
13*dbed73cbSSangeeta Misra  * When distributing Covered Code, include this CDDL HEADER in each
14*dbed73cbSSangeeta Misra  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*dbed73cbSSangeeta Misra  * If applicable, add the following below this CDDL HEADER, with the
16*dbed73cbSSangeeta Misra  * fields enclosed by brackets "[]" replaced with your own identifying
17*dbed73cbSSangeeta Misra  * information: Portions Copyright [yyyy] [name of copyright owner]
18*dbed73cbSSangeeta Misra  *
19*dbed73cbSSangeeta Misra  * CDDL HEADER END
20*dbed73cbSSangeeta Misra  */
21*dbed73cbSSangeeta Misra 
22*dbed73cbSSangeeta Misra /*
23*dbed73cbSSangeeta Misra  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24*dbed73cbSSangeeta Misra  * Use is subject to license terms.
25*dbed73cbSSangeeta Misra  */
26*dbed73cbSSangeeta Misra 
27*dbed73cbSSangeeta Misra #include <stdlib.h>
28*dbed73cbSSangeeta Misra #include <strings.h>
29*dbed73cbSSangeeta Misra #include <unistd.h>
30*dbed73cbSSangeeta Misra #include <stddef.h>
31*dbed73cbSSangeeta Misra #include <sys/types.h>
32*dbed73cbSSangeeta Misra #include <sys/socket.h>
33*dbed73cbSSangeeta Misra #include "libilb.h"
34*dbed73cbSSangeeta Misra #include "libilb_impl.h"
35*dbed73cbSSangeeta Misra 
36*dbed73cbSSangeeta Misra enum which_tbl {
37*dbed73cbSSangeeta Misra 	show_nat = 1,
38*dbed73cbSSangeeta Misra 	show_persist
39*dbed73cbSSangeeta Misra };
40*dbed73cbSSangeeta Misra 
41*dbed73cbSSangeeta Misra /* The common function to show kernel info. */
42*dbed73cbSSangeeta Misra static ilb_status_t ilb_show_info(ilb_handle_t, char *, size_t *, boolean_t *,
43*dbed73cbSSangeeta Misra     enum which_tbl);
44*dbed73cbSSangeeta Misra 
45*dbed73cbSSangeeta Misra /*
46*dbed73cbSSangeeta Misra  * To get the ILB NAT table.
47*dbed73cbSSangeeta Misra  *
48*dbed73cbSSangeeta Misra  * buf: The buffer to return the NAT table entries.
49*dbed73cbSSangeeta Misra  * num: The caller sets it to the number of ilb_nat_info_t entries buf can
50*dbed73cbSSangeeta Misra  *      hold.  On return, it contains the actual number of entries put in buf.
51*dbed73cbSSangeeta Misra  * end: The caller sets it to B_TRUE if it only wants at most num entries to
52*dbed73cbSSangeeta Misra  *      be returned.  The transaction to ilbd will be termianted when this
53*dbed73cbSSangeeta Misra  *      call returns.
54*dbed73cbSSangeeta Misra  *      The caller sets it to B_FALSE if it intends to get the whole table.
55*dbed73cbSSangeeta Misra  *      If the whole table has more than num entries, the caller can call
56*dbed73cbSSangeeta Misra  *      this function again to retrieve the rest of the table.
57*dbed73cbSSangeeta Misra  *      On return, end is set to B_TRUE if end of table is reached; B_FALSE
58*dbed73cbSSangeeta Misra  *      if there are still remaining entries.
59*dbed73cbSSangeeta Misra  */
60*dbed73cbSSangeeta Misra ilb_status_t
ilb_show_nat(ilb_handle_t h,ilb_nat_info_t buf[],size_t * num,boolean_t * end)61*dbed73cbSSangeeta Misra ilb_show_nat(ilb_handle_t h, ilb_nat_info_t buf[], size_t *num,
62*dbed73cbSSangeeta Misra     boolean_t *end)
63*dbed73cbSSangeeta Misra {
64*dbed73cbSSangeeta Misra 	return (ilb_show_info(h, (char *)buf, num, end, show_nat));
65*dbed73cbSSangeeta Misra }
66*dbed73cbSSangeeta Misra 
67*dbed73cbSSangeeta Misra /*
68*dbed73cbSSangeeta Misra  * To get the ILB persistent entry table.
69*dbed73cbSSangeeta Misra  *
70*dbed73cbSSangeeta Misra  * buf: The buffer to return the persistent table entries.
71*dbed73cbSSangeeta Misra  * num: The caller sets it to the number of ilb_persist_info_t entries buf can
72*dbed73cbSSangeeta Misra  *      hold.  On return, it contains the actual number of entries put in buf.
73*dbed73cbSSangeeta Misra  * end: The caller sets it to B_TRUE if it only wants at most num entries to
74*dbed73cbSSangeeta Misra  *      be returned.  The transaction to ilbd will be termianted when this
75*dbed73cbSSangeeta Misra  *      call returns.
76*dbed73cbSSangeeta Misra  *      The caller sets it to B_FALSE if it intends to get the whole table.
77*dbed73cbSSangeeta Misra  *      If the whole table has more than num entries, the caller can call
78*dbed73cbSSangeeta Misra  *      this function again to retrieve the rest of the table.
79*dbed73cbSSangeeta Misra  *      On return, end is set to B_TRUE if end of table is reached; B_FALSE
80*dbed73cbSSangeeta Misra  *      if there are still remaining entries.
81*dbed73cbSSangeeta Misra  */
82*dbed73cbSSangeeta Misra ilb_status_t
ilb_show_persist(ilb_handle_t h,ilb_persist_info_t buf[],size_t * num,boolean_t * end)83*dbed73cbSSangeeta Misra ilb_show_persist(ilb_handle_t h, ilb_persist_info_t buf[], size_t *num,
84*dbed73cbSSangeeta Misra     boolean_t *end)
85*dbed73cbSSangeeta Misra {
86*dbed73cbSSangeeta Misra 	return (ilb_show_info(h, (char *)buf, num, end, show_persist));
87*dbed73cbSSangeeta Misra }
88*dbed73cbSSangeeta Misra 
89*dbed73cbSSangeeta Misra /*
90*dbed73cbSSangeeta Misra  * The function doing the work...  The tbl parameter determines whith table
91*dbed73cbSSangeeta Misra  * to show.
92*dbed73cbSSangeeta Misra  */
93*dbed73cbSSangeeta Misra static ilb_status_t
ilb_show_info(ilb_handle_t h,char * buf,size_t * num,boolean_t * end,enum which_tbl tbl)94*dbed73cbSSangeeta Misra ilb_show_info(ilb_handle_t h, char *buf, size_t *num, boolean_t *end,
95*dbed73cbSSangeeta Misra     enum which_tbl tbl)
96*dbed73cbSSangeeta Misra {
97*dbed73cbSSangeeta Misra 	ilb_comm_t	*req, *rbuf;
98*dbed73cbSSangeeta Misra 	ilb_show_info_t	*req_si, *tmp_si;
99*dbed73cbSSangeeta Misra 	size_t		reqsz, rbufsz, tmp_rbufsz, cur_num;
100*dbed73cbSSangeeta Misra 	size_t		entry_sz;
101*dbed73cbSSangeeta Misra 	ilb_status_t	rc;
102*dbed73cbSSangeeta Misra 
103*dbed73cbSSangeeta Misra 	if (*num == 0)
104*dbed73cbSSangeeta Misra 		return (ILB_STATUS_EINVAL);
105*dbed73cbSSangeeta Misra 
106*dbed73cbSSangeeta Misra 	reqsz = sizeof (ilb_comm_t) + sizeof (ilb_show_info_t);
107*dbed73cbSSangeeta Misra 	if ((req = malloc(reqsz)) == NULL)
108*dbed73cbSSangeeta Misra 		return (ILB_STATUS_ENOMEM);
109*dbed73cbSSangeeta Misra 	req_si = (ilb_show_info_t *)&req->ic_data;
110*dbed73cbSSangeeta Misra 
111*dbed73cbSSangeeta Misra 	/*
112*dbed73cbSSangeeta Misra 	 * Need to allocate a receive buffer and then copy the buffer
113*dbed73cbSSangeeta Misra 	 * content to the passed in buf.  The reason is that the
114*dbed73cbSSangeeta Misra 	 * communication to ilbd is message based and the protocol
115*dbed73cbSSangeeta Misra 	 * includes a header in the reply.  We need to remove this header
116*dbed73cbSSangeeta Misra 	 * from the message, hence the copying...
117*dbed73cbSSangeeta Misra 	 */
118*dbed73cbSSangeeta Misra 	if (tbl == show_nat)
119*dbed73cbSSangeeta Misra 		entry_sz = sizeof (ilb_nat_info_t);
120*dbed73cbSSangeeta Misra 	else
121*dbed73cbSSangeeta Misra 		entry_sz = sizeof (ilb_persist_info_t);
122*dbed73cbSSangeeta Misra 	rbufsz = *num * entry_sz + sizeof (ilb_comm_t) +
123*dbed73cbSSangeeta Misra 	    sizeof (ilb_show_info_t);
124*dbed73cbSSangeeta Misra 	if ((rbuf = malloc(rbufsz)) == NULL) {
125*dbed73cbSSangeeta Misra 		free(req);
126*dbed73cbSSangeeta Misra 		return (ILB_STATUS_ENOMEM);
127*dbed73cbSSangeeta Misra 	}
128*dbed73cbSSangeeta Misra 
129*dbed73cbSSangeeta Misra 	if (tbl == show_nat)
130*dbed73cbSSangeeta Misra 		req->ic_cmd = ILBD_SHOW_NAT;
131*dbed73cbSSangeeta Misra 	else
132*dbed73cbSSangeeta Misra 		req->ic_cmd = ILBD_SHOW_PERSIST;
133*dbed73cbSSangeeta Misra 	req->ic_flags = 0;
134*dbed73cbSSangeeta Misra 	req_si->sn_num = *num;
135*dbed73cbSSangeeta Misra 	cur_num = 0;
136*dbed73cbSSangeeta Misra 
137*dbed73cbSSangeeta Misra 	do {
138*dbed73cbSSangeeta Misra 		tmp_rbufsz = rbufsz;
139*dbed73cbSSangeeta Misra 		rc = i_ilb_do_comm(h, req, reqsz, rbuf, &tmp_rbufsz);
140*dbed73cbSSangeeta Misra 		if (rc != ILB_STATUS_OK)
141*dbed73cbSSangeeta Misra 			goto out;
142*dbed73cbSSangeeta Misra 		if (rbuf->ic_cmd != ILBD_CMD_OK) {
143*dbed73cbSSangeeta Misra 			rc = *(ilb_status_t *)&rbuf->ic_data;
144*dbed73cbSSangeeta Misra 			goto out;
145*dbed73cbSSangeeta Misra 		}
146*dbed73cbSSangeeta Misra 
147*dbed73cbSSangeeta Misra 		tmp_si = (ilb_show_info_t *)&rbuf->ic_data;
148*dbed73cbSSangeeta Misra 
149*dbed73cbSSangeeta Misra 		cur_num += tmp_si->sn_num;
150*dbed73cbSSangeeta Misra 		bcopy(&tmp_si->sn_data, buf, tmp_si->sn_num * entry_sz);
151*dbed73cbSSangeeta Misra 		buf += tmp_si->sn_num * entry_sz;
152*dbed73cbSSangeeta Misra 
153*dbed73cbSSangeeta Misra 		/*
154*dbed73cbSSangeeta Misra 		 * Buffer is filled, regardless of this is the end of table or
155*dbed73cbSSangeeta Misra 		 * not, we need to stop.
156*dbed73cbSSangeeta Misra 		 */
157*dbed73cbSSangeeta Misra 		if (cur_num == *num)
158*dbed73cbSSangeeta Misra 			break;
159*dbed73cbSSangeeta Misra 		/* Try to fill in the rest. */
160*dbed73cbSSangeeta Misra 		req_si->sn_num = *num - cur_num;
161*dbed73cbSSangeeta Misra 	} while (!(rbuf->ic_flags & ILB_COMM_END));
162*dbed73cbSSangeeta Misra 
163*dbed73cbSSangeeta Misra 	*num = cur_num;
164*dbed73cbSSangeeta Misra 
165*dbed73cbSSangeeta Misra 	/* End of transaction, let the caller know. */
166*dbed73cbSSangeeta Misra 	if (rbuf->ic_flags & ILB_COMM_END) {
167*dbed73cbSSangeeta Misra 		*end = B_TRUE;
168*dbed73cbSSangeeta Misra 	} else {
169*dbed73cbSSangeeta Misra 		/* The user wants to terminate the transaction */
170*dbed73cbSSangeeta Misra 		if (*end) {
171*dbed73cbSSangeeta Misra 			req->ic_flags = ILB_COMM_END;
172*dbed73cbSSangeeta Misra 			tmp_rbufsz = rbufsz;
173*dbed73cbSSangeeta Misra 			rc = i_ilb_do_comm(h, req, reqsz, rbuf, &tmp_rbufsz);
174*dbed73cbSSangeeta Misra 		}
175*dbed73cbSSangeeta Misra 	}
176*dbed73cbSSangeeta Misra out:
177*dbed73cbSSangeeta Misra 	free(req);
178*dbed73cbSSangeeta Misra 	free(rbuf);
179*dbed73cbSSangeeta Misra 	return (rc);
180*dbed73cbSSangeeta Misra }
181