1 /*
2 * s_common.c - common utilities for Solaris PPP
3 *
4 * Copyright (c) 2000 by Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies.
10 *
11 * SUN MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY OF
12 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
13 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
14 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
15 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
16 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
17 */
18
19 #pragma ident "%Z%%M% %I% %E% SMI"
20 #define RCSID "$Id: s_common.c,v 1.0 2000/05/08 01:10:12 masputra Exp $"
21
22 #include <sys/types.h>
23 #include <sys/debug.h>
24 #include <sys/param.h>
25 #include <sys/stat.h>
26 #include <sys/stream.h>
27 #include <sys/stropts.h>
28 #include <sys/errno.h>
29 #include <sys/ioccom.h>
30 #include <sys/cmn_err.h>
31 #include <sys/ddi.h>
32 #include <sys/sunddi.h>
33 #include <sys/strsun.h>
34 #include <net/ppp_defs.h>
35 #include <net/pppio.h>
36 #include "s_common.h"
37
38 /*
39 * putctl4()
40 *
41 * Description:
42 * Create and send a 4-byte message.
43 */
44 int
putctl4(queue_t * q,uchar_t type,uchar_t code,uint16_t val)45 putctl4(queue_t *q, uchar_t type, uchar_t code, uint16_t val)
46 {
47 mblk_t *mp;
48
49 if ((mp = allocb(4, BPRI_HI)) == NULL) {
50 return (0);
51 }
52 MTYPE(mp) = type;
53 mp->b_wptr[0] = code;
54 ((uint16_t *)mp->b_wptr)[1] = val;
55 mp->b_wptr += 4;
56
57 putnext(q, mp);
58 return (1);
59 }
60
61 /*
62 * putctl8()
63 *
64 * Description:
65 * Create and send a 8-byte message.
66 */
67 int
putctl8(queue_t * q,uchar_t type,uchar_t code,uint32_t val)68 putctl8(queue_t *q, uchar_t type, uchar_t code, uint32_t val)
69 {
70 mblk_t *mp;
71
72 if ((mp = allocb(8, BPRI_HI)) == NULL) {
73 return (0);
74 }
75 MTYPE(mp) = type;
76 mp->b_wptr[0] = code;
77 ((uint32_t *)mp->b_wptr)[1] = val;
78 mp->b_wptr += 8;
79
80 putnext(q, mp);
81 return (1);
82 }
83
84 /*
85 * msg_byte()
86 *
87 * Description:
88 * Helper routine to return a specific byte off a data buffer.
89 */
90 int
msg_byte(mblk_t * mp,unsigned int i)91 msg_byte(mblk_t *mp, unsigned int i)
92 {
93 while (mp != NULL) {
94 if (i < MBLKL(mp)) {
95 break;
96 }
97 i -= MBLKL(mp);
98 mp = mp->b_cont;
99 }
100 if (mp == NULL) {
101 return (-1);
102 }
103 return (mp->b_rptr[i]);
104 }
105
106 /*
107 * sppp_create_lsmsg()
108 *
109 * Description:
110 * Create a PPP link status message.
111 */
112 mblk_t *
create_lsmsg(enum LSstat ls_type)113 create_lsmsg(enum LSstat ls_type)
114 {
115 mblk_t *mp;
116 struct ppp_ls *plt;
117
118 if ((mp = allocb(sizeof (*plt), BPRI_HI)) == NULL) {
119 return (NULL);
120 }
121 /*
122 * Make sure that this message is a control message, and contains
123 * a notification that the link has been terminated.
124 */
125 MTYPE(mp) = M_PROTO;
126 mp->b_wptr += sizeof (*plt);
127 plt = (struct ppp_ls *)mp->b_rptr;
128 plt->magic = PPPLSMAGIC;
129 plt->ppp_message = ls_type;
130
131 return (mp);
132 }
133