| 1 |
/* macnsmtp.c -- simple async SMTP client |
| 2 |
*/ |
| 3 |
/* (C) Copyright 1995 by Carnegie Mellon University |
| 4 |
* All Rights Reserved. |
| 5 |
* |
| 6 |
* Permission to use, copy, modify, distribute, and sell this software |
| 7 |
* and its documentation for any purpose is hereby granted without |
| 8 |
* fee, provided that the above copyright notice appear in all copies |
| 9 |
* and that both that copyright notice and this permission notice |
| 10 |
* appear in supporting documentation, and that the name of Carnegie |
| 11 |
* Mellon University not be used in advertising or publicity |
| 12 |
* pertaining to distribution of the software without specific, |
| 13 |
* written prior permission. Carnegie Mellon University makes no |
| 14 |
* representations about the suitability of this software for any |
| 15 |
* purpose. It is provided "as is" without express or implied |
| 16 |
* warranty. |
| 17 |
* |
| 18 |
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 19 |
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
| 20 |
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE |
| 21 |
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 22 |
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN |
| 23 |
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
| 24 |
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 25 |
* SOFTWARE. |
| 26 |
*/ |
| 27 |
/* (C) Copyright 1994-1995 by Christopher J. Newman |
| 28 |
* All Rights Reserved. |
| 29 |
* |
| 30 |
* Permission to use, copy, modify, distribute, and sell this software and its |
| 31 |
* documentation for any purpose is hereby granted without fee, provided that |
| 32 |
* the above copyright notice appear in all copies and that both that |
| 33 |
* copyright notice and this permission notice appear in supporting |
| 34 |
* documentation, and that the name of Christopher J. Newman not be used in |
| 35 |
* advertising or publicity pertaining to distribution of the software without |
| 36 |
* specific, written prior permission. Christopher J. Newman makes no |
| 37 |
* representations about the suitability of this software for any purpose. It |
| 38 |
* is provided "as is" without express or implied warranty. |
| 39 |
* |
| 40 |
* CHRISTOPHER J. NEWMAN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 41 |
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT |
| 42 |
* SHALL CHRISTOPHER J. NEWMAN BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 43 |
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 44 |
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 45 |
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 46 |
* OF THIS SOFTWARE. |
| 47 |
* |
| 48 |
* Author: Christopher J. Newman |
| 49 |
* Message: This is a nifty program. |
| 50 |
*/ |
| 51 |
|
| 52 |
#include "macnapp.h" |
| 53 |
|
| 54 |
#define SMTP_PORT 25 |
| 55 |
|
| 56 |
typedef struct { |
| 57 |
na_win w; |
| 58 |
void *context; /* user context */ |
| 59 |
short num, rcpt; /* recipient count (num), and sent (rcpt) */ |
| 60 |
na_smtpstat statf; /* callback */ |
| 61 |
na_tcp tcpid; /* TCP id */ |
| 62 |
short state; /* SMTP state (see below) */ |
| 63 |
short count; /* bytes used in linebuf */ |
| 64 |
short refnum; /* input file */ |
| 65 |
short crfound:1; /* found a CR in SMTP server data */ |
| 66 |
short crlf:1; /* found a CRLF in SMTP server data */ |
| 67 |
short crtrans:1; /* translate CR to CRLF in file */ |
| 68 |
long headsize; /* size of extra headers starting at data */ |
| 69 |
long fsize, fdone; /* file size & amount written */ |
| 70 |
long bufsize; /* usable buffer size */ |
| 71 |
Ptr buf; /* output buffer */ |
| 72 |
char linebuf[1024]; /* input line buffer */ |
| 73 |
char data[1]; /* header & envelope */ |
| 74 |
} na_smtpwin; |
| 75 |
|
| 76 |
#define sw ((na_smtpwin *) w) |
| 77 |
|
| 78 |
/* states: */ |
| 79 |
#define S_conn 0 /* connecting to server */ |
| 80 |
#define S_greet 1 /* waiting for greeting */ |
| 81 |
#define S_hello 2 /* waiting for local host lookup and HELO reply */ |
| 82 |
#define S_mailf 3 /* waiting for MAIL FROM reply */ |
| 83 |
#define S_rcpt 4 /* waiting for RCPT TO reply */ |
| 84 |
#define S_data 5 /* waiting for DATA continue reply */ |
| 85 |
#define S_send 6 /* transmitting data */ |
| 86 |
#define S_done 7 /* waiting for DATA success reply */ |
| 87 |
#define S_quit 8 /* waiting for QUIT reply */ |
| 88 |
#define S_wait 9 /* waiting for connection close */ |
| 89 |
#define S_close 10 /* closed */ |
| 90 |
|
| 91 |
/* generate and submit SMTP command line (put command & data together with CRLF ending) |
| 92 |
* returns NATCPwrite result code |
| 93 |
*/ |
| 94 |
static int SMTPsend(na_win *w, char *com, char *data) |
| 95 |
{ |
| 96 |
char buf[512]; |
| 97 |
char *dest = buf; |
| 98 |
int result = 0; |
| 99 |
|
| 100 |
while ((*dest = *com) != '\0') ++dest, ++com; |
| 101 |
if (data) { |
| 102 |
while ((*dest = *data++) != '\0') ++dest; |
| 103 |
if (com[-1] == '<') *dest++ = '>'; |
| 104 |
} |
| 105 |
*dest++ = '\r'; |
| 106 |
*dest++ = '\n'; |
| 107 |
result = NATCPwrite(sw->tcpid, buf, dest - buf, -1); |
| 108 |
|
| 109 |
return (result); |
| 110 |
} |
| 111 |
|
| 112 |
/* do final callback |
| 113 |
*/ |
| 114 |
static void smtpclose(na_win *w, short code, short err, long size, char *data) |
| 115 |
{ |
| 116 |
if (sw->state < S_wait) { |
| 117 |
NATCPclose(sw->tcpid); |
| 118 |
FSClose(sw->refnum); |
| 119 |
sw->state = S_wait; |
| 120 |
(*sw->statf)(sw->context, code, err, size, data); |
| 121 |
} |
| 122 |
} |
| 123 |
|
| 124 |
/* TCP read/write callback |
| 125 |
*/ |
| 126 |
static void readp(void *wh, na_tcp s, short status, long size, char *data) |
| 127 |
{ |
| 128 |
na_win *w, **taskh; |
| 129 |
char *dest; |
| 130 |
short major, count, smtpcode; |
| 131 |
|
| 132 |
/* make sure our SMTP task still exists */ |
| 133 |
for (taskh = NAtask; taskh && taskh != wh; taskh = (*taskh)->task); |
| 134 |
if (!taskh) return; |
| 135 |
|
| 136 |
/* handle TCP result */ |
| 137 |
w = NAlockWindow((na_win **) wh); |
| 138 |
if (status == NATCP_connect) { |
| 139 |
/* deal with new connection */ |
| 140 |
sw->state = S_greet; |
| 141 |
} else if (status < 0) { |
| 142 |
/* deal with TCP errors */ |
| 143 |
smtpclose(w, NASMTP_tcpfail, status, size, NULL); |
| 144 |
if (status == NATCP_closed) sw->state = S_close; |
| 145 |
} else if (status & NATCP_closing) { |
| 146 |
/* deal with a closed connection */ |
| 147 |
if (sw->state < S_wait) { |
| 148 |
smtpclose(w, NASMTP_conclosed, 0, 0, NULL); |
| 149 |
} |
| 150 |
} else if (status & NATCP_data) { |
| 151 |
do { |
| 152 |
/* buffer SMTP line */ |
| 153 |
dest = sw->linebuf + sw->count; |
| 154 |
while (size && sw->count < sizeof (sw->linebuf)) { |
| 155 |
--size, ++sw->count; |
| 156 |
if (sw->crfound && *data == '\n') { |
| 157 |
*--dest = '\0'; |
| 158 |
--sw->count; |
| 159 |
++data; |
| 160 |
sw->crfound = 0; |
| 161 |
sw->crlf = 1; |
| 162 |
break; |
| 163 |
} |
| 164 |
sw->crfound = (*dest++ = *data++) == '\r'; |
| 165 |
} |
| 166 |
if (!sw->crlf) { |
| 167 |
if (sw->count == sizeof (sw->linebuf)) { |
| 168 |
sw->linebuf[sw->count - 1] = '\0'; |
| 169 |
smtpclose(w, NASMTP_badprot, 0, 0, sw->linebuf); |
| 170 |
} |
| 171 |
break; |
| 172 |
} |
| 173 |
sw->crlf = 0; |
| 174 |
/* parse SMTP result code */ |
| 175 |
dest = sw->linebuf; |
| 176 |
if (sw->count < 3 || !isdigit(dest[0]) |
| 177 |
|| !isdigit(dest[1]) || !isdigit(dest[2])) { |
| 178 |
smtpclose(w, NASMTP_badprot, 0, 0, dest); |
| 179 |
break; |
| 180 |
} |
| 181 |
sw->count = 0; |
| 182 |
major = dest[0] - '0'; |
| 183 |
smtpcode = major * 100 + (dest[1] - '0') * 10 + (dest[2] - '0'); |
| 184 |
/* handle reply continuation */ |
| 185 |
if (dest[3] == '-') continue; |
| 186 |
/* handle major errors */ |
| 187 |
if (major > 3) { |
| 188 |
if (sw->state != S_rcpt) { |
| 189 |
smtpclose(w, major == 4 ? NASMTP_temperr : NASMTP_permerr, |
| 190 |
smtpcode, sw->state, dest + 3); |
| 191 |
break; |
| 192 |
} |
| 193 |
(*sw->statf)(sw->context, NASMTP_badaddr, smtpcode, 0, sw->linebuf + 3); |
| 194 |
} |
| 195 |
dest = sw->data + sw->headsize; |
| 196 |
/* state changes */ |
| 197 |
switch (sw->state) { |
| 198 |
case S_greet: |
| 199 |
if (sw->buf) { |
| 200 |
SMTPsend(w, "HELO ", sw->buf); |
| 201 |
if (sw->buf) DisposPtr(sw->buf); |
| 202 |
} |
| 203 |
sw->state = S_hello; |
| 204 |
break; |
| 205 |
case S_hello: |
| 206 |
SMTPsend(w, "MAIL FROM:<", dest); |
| 207 |
(*sw->statf)(sw->context, NASMTP_progress, 5, 0, 0); |
| 208 |
sw->state = S_mailf; |
| 209 |
break; |
| 210 |
case S_mailf: |
| 211 |
case S_rcpt: |
| 212 |
count = ++sw->rcpt; |
| 213 |
if (count < sw->num + 1) { |
| 214 |
while (count--) { |
| 215 |
while (*dest++); |
| 216 |
} |
| 217 |
SMTPsend(w, "RCPT TO:<", dest); |
| 218 |
(*sw->statf)(sw->context, NASMTP_progress, 5 + 10 * sw->rcpt / sw->num, 0, 0); |
| 219 |
} else { |
| 220 |
sw->state = S_data; |
| 221 |
SMTPsend(w, "DATA", 0); |
| 222 |
(*sw->statf)(sw->context, NASMTP_progress, 20, 0, 0); |
| 223 |
} |
| 224 |
break; |
| 225 |
case S_data: |
| 226 |
if (major != 3) { |
| 227 |
smtpclose(w, NASMTP_badprot, 0, 0, dest); |
| 228 |
break; |
| 229 |
} |
| 230 |
sw->state = S_send; |
| 231 |
if (sw->headsize) { |
| 232 |
sw->buf = NewPtr(sw->bufsize = sw->headsize); |
| 233 |
if (!sw->buf) { |
| 234 |
smtpclose(w, NASMTP_nomem, 0, 0, NULL); |
| 235 |
break; |
| 236 |
} |
| 237 |
memcpy(sw->buf, sw->data, sw->headsize); |
| 238 |
} |
| 239 |
case S_send: |
| 240 |
/* NOTE: this case should never happen */ |
| 241 |
break; |
| 242 |
case S_done: |
| 243 |
sw->state = S_quit; |
| 244 |
SMTPsend(w, "QUIT", NULL); |
| 245 |
(*sw->statf)(sw->context, NASMTP_progress, 95, 0, 0); |
| 246 |
break; |
| 247 |
case S_quit: |
| 248 |
smtpclose(w, NASMTP_completed, 0, 0, 0); |
| 249 |
break; |
| 250 |
} |
| 251 |
} while (size); |
| 252 |
} |
| 253 |
NAunlockWindowh((na_win **) wh, w) |
| 254 |
} |
| 255 |
|
| 256 |
/* TCP gethost callback |
| 257 |
*/ |
| 258 |
static void hostp(void *wh, na_tcp s, short status, long size, char *data) |
| 259 |
{ |
| 260 |
na_win *w, **taskh; |
| 261 |
|
| 262 |
/* make sure our task still exists */ |
| 263 |
for (taskh = NAtask; taskh && taskh != wh; taskh = (*taskh)->task); |
| 264 |
if (!taskh) return; |
| 265 |
|
| 266 |
/* store host/error */ |
| 267 |
w = NAlockWindow((na_win **) wh); |
| 268 |
if (status == NATCP_connect) { |
| 269 |
if (sw->state == S_hello) { |
| 270 |
SMTPsend(w, "HELO ", data); |
| 271 |
} else { |
| 272 |
sw->buf = NewPtr(size + 1); |
| 273 |
if (sw->buf == NULL) { |
| 274 |
smtpclose(w, NASMTP_nomem, 0, 0, NULL); |
| 275 |
} else { |
| 276 |
memcpy(sw->buf, data, size + 1); |
| 277 |
} |
| 278 |
} |
| 279 |
} else { |
| 280 |
smtpclose(w, NASMTP_tcpfail, status, size, NULL); |
| 281 |
} |
| 282 |
NAunlockWindowh((na_win **) wh, w); |
| 283 |
} |
| 284 |
|
| 285 |
/* translate CR to CRLF |
| 286 |
*/ |
| 287 |
static void crtocrlf(char *buf, long *size) |
| 288 |
{ |
| 289 |
long crcount = 0; |
| 290 |
char *src, *dst, *end = buf + *size; |
| 291 |
|
| 292 |
for (src = buf; src < end; ++src) { |
| 293 |
if (src[0] == '\r') ++crcount; |
| 294 |
} |
| 295 |
src = end - 1; |
| 296 |
for (dst = src + crcount; dst > src; *dst-- = *src--) { |
| 297 |
if (*src == '\r') *dst-- = '\n'; |
| 298 |
} |
| 299 |
*size += crcount; |
| 300 |
} |
| 301 |
|
| 302 |
/* SMTP task |
| 303 |
*/ |
| 304 |
static short taskp(na_win *w) |
| 305 |
{ |
| 306 |
OSErr oserr; |
| 307 |
|
| 308 |
if (sw->state == S_send || sw->state == S_done) { |
| 309 |
/*XXX: could be generous with NewPtr() failure if a NATCPwritePending() */ |
| 310 |
if (!sw->bufsize) { |
| 311 |
if ((sw->buf = NewPtr(8192)) == NULL) { |
| 312 |
smtpclose(w, NASMTP_nomem, 0, 0, NULL); |
| 313 |
return (NA_NOTPROCESSED); |
| 314 |
} |
| 315 |
sw->bufsize = sw->crtrans ? 4096 : 8192; |
| 316 |
oserr = FSRead(sw->refnum, &sw->bufsize, sw->buf); |
| 317 |
if (oserr != noErr && oserr != eofErr) sw->bufsize = 0; |
| 318 |
if (!sw->bufsize) { |
| 319 |
if (oserr == eofErr && sw->state == S_send) { |
| 320 |
memcpy(sw->buf, "\r\n.\r\n", 5); |
| 321 |
sw->bufsize = 5; |
| 322 |
sw->state = S_done; |
| 323 |
} else { |
| 324 |
DisposPtr(sw->buf); |
| 325 |
} |
| 326 |
} else { |
| 327 |
if (sw->crtrans) { |
| 328 |
crtocrlf(sw->buf, &sw->bufsize); |
| 329 |
} |
| 330 |
(*sw->statf)(sw->context, NASMTP_progress, 20 |
| 331 |
+ 70 * (sw->fdone += sw->bufsize) / sw->fsize, 0, 0); |
| 332 |
} |
| 333 |
} |
| 334 |
if (sw->bufsize && NATCPwrite(sw->tcpid, sw->buf, sw->bufsize, 1) == NATCP_data) { |
| 335 |
sw->bufsize = 0; |
| 336 |
} |
| 337 |
} |
| 338 |
|
| 339 |
return (sw->state == S_close ? NA_REQCLOSE : NA_NOTPROCESSED); |
| 340 |
} |
| 341 |
|
| 342 |
/* SMTP close procedure |
| 343 |
* IMPORTANT: if the user quits during mail transmission, we want to |
| 344 |
* warn the user that mail will be lost. |
| 345 |
*/ |
| 346 |
static short closep(na_win *w) |
| 347 |
{ |
| 348 |
if (sw->state < S_wait) { |
| 349 |
/*XXX: put modal dialog here, allow abort of close */ |
| 350 |
if (sw->tcpid >= 0) NATCPclose(sw->tcpid); |
| 351 |
FSClose(sw->refnum); |
| 352 |
} |
| 353 |
|
| 354 |
return (NA_CLOSED); |
| 355 |
} |
| 356 |
|
| 357 |
/* submit file to SMTP: |
| 358 |
* creates SMTP task, initializes data, starts TCP connection |
| 359 |
* copies from & dest addresses, so they don't need to persist |
| 360 |
* task is not completed until statf() is called |
| 361 |
*/ |
| 362 |
void NASMTPsubmit(na_smtpstat statf, char *server, FSSpec *fspec, Handle headers, |
| 363 |
Handle envelope, short flags, void *context) |
| 364 |
{ |
| 365 |
long size; |
| 366 |
na_win **wh, *w; |
| 367 |
char *src, *dst; |
| 368 |
OSErr oserr; |
| 369 |
|
| 370 |
/* create task */ |
| 371 |
size = sizeof (na_smtpwin); |
| 372 |
if (headers) size += GetHandleSize(headers); |
| 373 |
size += GetHandleSize(envelope); |
| 374 |
wh = NAaddtask(taskp, size); |
| 375 |
if (!wh) { |
| 376 |
(*statf)(context, NASMTP_nomem, 0, 0, 0); |
| 377 |
return; |
| 378 |
} |
| 379 |
|
| 380 |
/* init task */ |
| 381 |
w = NAlockWindow(wh); |
| 382 |
w->type = NA_SMTPTYPE; |
| 383 |
w->closep = closep; |
| 384 |
sw->context = context; |
| 385 |
sw->statf = statf; |
| 386 |
if (headers && (sw->headsize = GetHandleSize(headers))) { |
| 387 |
memcpy(sw->data, (char *) *headers, sw->headsize); |
| 388 |
} |
| 389 |
size = GetHandleSize(envelope); |
| 390 |
sw->num = -1; |
| 391 |
dst = sw->data + sw->headsize; |
| 392 |
for (src = (char *) *envelope; size; --size) { |
| 393 |
if ((*dst++ = *src++) == '\0') ++sw->num; |
| 394 |
} |
| 395 |
if (flags & NASMTP_crtrans) sw->crtrans = 1; |
| 396 |
|
| 397 |
/* open file */ |
| 398 |
if ((oserr = HOpen(fspec->vRefNum, fspec->parID, fspec->name, |
| 399 |
fsRdPerm, &sw->refnum)) != noErr) { |
| 400 |
(*statf)(context, NASMTP_oserr, 0, oserr, 0); |
| 401 |
NAcloseWindow(w, NA_CLOSED); |
| 402 |
return; |
| 403 |
} |
| 404 |
GetEOF(sw->refnum, &sw->fsize); |
| 405 |
|
| 406 |
/* open MacTCP */ |
| 407 |
sw->tcpid = NATCPopen(readp, (void *) wh, server, SMTP_PORT, 0); |
| 408 |
if (sw->tcpid != -1) NATCPgethost(hostp, (void *) wh); |
| 409 |
NAunlockWindowh(wh, w); |
| 410 |
} |
Parent Directory
| 
Revision Log
| 
Revision Graph