1 /* $NetBSD: rcpt_buf.c,v 1.4 2022/10/08 16:12:45 christos Exp $ */
2
3 /*++
4 /* NAME
5 /* rcpt_buf
6 /* SUMMARY
7 /* recipient buffer manager
8 /* SYNOPSIS
9 /* #include <rcpt_buf.h>
10 /*
11 /* typedef struct {
12 /* RECIPIENT rcpt; /* convenience */
13 /* .in +4
14 /* VSTRING *address; /* final recipient */
15 /* VSTRING *orig_addr; /* original recipient */
16 /* VSTRING *dsn_orcpt; /* dsn original recipient */
17 /* int dsn_notify; /* DSN notify flags */
18 /* long offset; /* REC_TYPE_RCPT byte */
19 /* .in -4
20 /* } RCPT_BUF;
21 /*
22 /* RECIPIENT *RECIPIENT_FROM_RCPT_BUF(rcpb)
23 /* RCPT_BUF *rcpb;
24 /*
25 /* RCPT_BUF *rcpb_create(void)
26 /*
27 /* void rcpb_reset(rcpb)
28 /* RCPT_BUF *rcpb;
29 /*
30 /* void rcpb_free(rcpb)
31 /* RCPT_BUF *rcpb;
32 /*
33 /* int rcpb_scan(scan_fn, stream, flags, ptr)
34 /* ATTR_SCAN_COMMON_FN scan_fn;
35 /* VSTREAM *stream;
36 /* int flags;
37 /* void *ptr;
38 /* DESCRIPTION
39 /* RECIPIENT_FROM_RCPT_BUF() populates the rcpt member with
40 /* a shallow copy of the contents of the other fields.
41 /*
42 /* rcpb_scan() reads a recipient buffer from the named stream
43 /* using the specified attribute scan routine. rcpb_scan()
44 /* is meant to be passed as a call-back to attr_scan(), thusly:
45 /*
46 /* ... ATTR_TYPE_FUNC, rcpb_scan, (void *) rcpt_buf, ...
47 /*
48 /* rcpb_create(), rcpb_reset() and rcpb_free() create, wipe
49 /* and destroy recipient buffer instances.
50 /* DIAGNOSTICS
51 /* Fatal: out of memory.
52 /* LICENSE
53 /* .ad
54 /* .fi
55 /* The Secure Mailer license must be distributed with this software.
56 /* AUTHOR(S)
57 /* Wietse Venema
58 /* IBM T.J. Watson Research
59 /* P.O. Box 704
60 /* Yorktown Heights, NY 10598, USA
61 /*
62 /* Wietse Venema
63 /* Google, Inc.
64 /* 111 8th Avenue
65 /* New York, NY 10011, USA
66 /*--*/
67
68 /* System library. */
69
70 #include <sys_defs.h>
71
72 /* Utility library. */
73
74 #include <mymalloc.h>
75 #include <vstring.h>
76 #include <vstream.h>
77
78 /* Global library. */
79
80 #include <mail_proto.h>
81 #include <rcpt_buf.h>
82
83 /* Application-specific. */
84
85 /* rcpb_create - create recipient buffer */
86
rcpb_create(void)87 RCPT_BUF *rcpb_create(void)
88 {
89 RCPT_BUF *rcpt;
90
91 rcpt = (RCPT_BUF *) mymalloc(sizeof(*rcpt));
92 rcpt->offset = 0;
93 rcpt->dsn_orcpt = vstring_alloc(10);
94 rcpt->dsn_notify = 0;
95 rcpt->orig_addr = vstring_alloc(10);
96 rcpt->address = vstring_alloc(10);
97 return (rcpt);
98 }
99
100 /* rcpb_reset - reset recipient buffer */
101
rcpb_reset(RCPT_BUF * rcpt)102 void rcpb_reset(RCPT_BUF *rcpt)
103 {
104 #define BUF_TRUNCATE(s) (vstring_str(s)[0] = 0)
105
106 rcpt->offset = 0;
107 BUF_TRUNCATE(rcpt->dsn_orcpt);
108 rcpt->dsn_notify = 0;
109 BUF_TRUNCATE(rcpt->orig_addr);
110 BUF_TRUNCATE(rcpt->address);
111 }
112
113 /* rcpb_free - destroy recipient buffer */
114
rcpb_free(RCPT_BUF * rcpt)115 void rcpb_free(RCPT_BUF *rcpt)
116 {
117 vstring_free(rcpt->dsn_orcpt);
118 vstring_free(rcpt->orig_addr);
119 vstring_free(rcpt->address);
120 myfree((void *) rcpt);
121 }
122
123 /* rcpb_scan - receive recipient buffer */
124
rcpb_scan(ATTR_SCAN_COMMON_FN scan_fn,VSTREAM * fp,int flags,void * ptr)125 int rcpb_scan(ATTR_SCAN_COMMON_FN scan_fn, VSTREAM *fp,
126 int flags, void *ptr)
127 {
128 RCPT_BUF *rcpt = (RCPT_BUF *) ptr;
129 int ret;
130
131 /*
132 * The order of attributes is determined by historical compatibility and
133 * can be fixed after all the ad-hoc read/write code is replaced.
134 */
135 ret = scan_fn(fp, flags | ATTR_FLAG_MORE,
136 RECV_ATTR_STR(MAIL_ATTR_ORCPT, rcpt->orig_addr),
137 RECV_ATTR_STR(MAIL_ATTR_RECIP, rcpt->address),
138 RECV_ATTR_LONG(MAIL_ATTR_OFFSET, &rcpt->offset),
139 RECV_ATTR_STR(MAIL_ATTR_DSN_ORCPT, rcpt->dsn_orcpt),
140 RECV_ATTR_INT(MAIL_ATTR_DSN_NOTIFY, &rcpt->dsn_notify),
141 ATTR_TYPE_END);
142 return (ret == 5 ? 1 : -1);
143 }
144