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 #define RCSID "$Id: s_common.c,v 1.0 2000/05/08 01:10:12 masputra Exp $"
20
21 #include <sys/types.h>
22 #include <sys/debug.h>
23 #include <sys/param.h>
24 #include <sys/stat.h>
25 #include <sys/stream.h>
26 #include <sys/stropts.h>
27 #include <sys/errno.h>
28 #include <sys/ioccom.h>
29 #include <sys/cmn_err.h>
30 #include <sys/ddi.h>
31 #include <sys/sunddi.h>
32 #include <sys/strsun.h>
33 #include <net/ppp_defs.h>
34 #include <net/pppio.h>
35 #include "s_common.h"
36
37 /*
38 * putctl4()
39 *
40 * Description:
41 * Create and send a 4-byte message.
42 */
43 int
putctl4(queue_t * q,uchar_t type,uchar_t code,uint16_t val)44 putctl4(queue_t *q, uchar_t type, uchar_t code, uint16_t val)
45 {
46 mblk_t *mp;
47
48 if ((mp = allocb(4, BPRI_HI)) == NULL) {
49 return (0);
50 }
51 MTYPE(mp) = type;
52 mp->b_wptr[0] = code;
53 ((uint16_t *)mp->b_wptr)[1] = val;
54 mp->b_wptr += 4;
55
56 putnext(q, mp);
57 return (1);
58 }
59
60 /*
61 * putctl8()
62 *
63 * Description:
64 * Create and send a 8-byte message.
65 */
66 int
putctl8(queue_t * q,uchar_t type,uchar_t code,uint32_t val)67 putctl8(queue_t *q, uchar_t type, uchar_t code, uint32_t val)
68 {
69 mblk_t *mp;
70
71 if ((mp = allocb(8, BPRI_HI)) == NULL) {
72 return (0);
73 }
74 MTYPE(mp) = type;
75 mp->b_wptr[0] = code;
76 ((uint32_t *)mp->b_wptr)[1] = val;
77 mp->b_wptr += 8;
78
79 putnext(q, mp);
80 return (1);
81 }
82
83 /*
84 * msg_byte()
85 *
86 * Description:
87 * Helper routine to return a specific byte off a data buffer.
88 */
89 int
msg_byte(mblk_t * mp,unsigned int i)90 msg_byte(mblk_t *mp, unsigned int i)
91 {
92 while (mp != NULL) {
93 if (i < MBLKL(mp)) {
94 break;
95 }
96 i -= MBLKL(mp);
97 mp = mp->b_cont;
98 }
99 if (mp == NULL) {
100 return (-1);
101 }
102 return (mp->b_rptr[i]);
103 }
104
105 /*
106 * sppp_create_lsmsg()
107 *
108 * Description:
109 * Create a PPP link status message.
110 */
111 mblk_t *
create_lsmsg(enum LSstat ls_type)112 create_lsmsg(enum LSstat ls_type)
113 {
114 mblk_t *mp;
115 struct ppp_ls *plt;
116
117 if ((mp = allocb(sizeof (*plt), BPRI_HI)) == NULL) {
118 return (NULL);
119 }
120 /*
121 * Make sure that this message is a control message, and contains
122 * a notification that the link has been terminated.
123 */
124 MTYPE(mp) = M_PROTO;
125 mp->b_wptr += sizeof (*plt);
126 plt = (struct ppp_ls *)mp->b_rptr;
127 plt->magic = PPPLSMAGIC;
128 plt->ppp_message = ls_type;
129
130 return (mp);
131 }
132