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pop3.c
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C/C++ Source or Header
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1996-10-22
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37KB
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1,419 lines
/*
* Program: Post Office Protocol 3 (POP3) client routines
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 6 June 1994
* Last Edited: 22 October 1996
*
* Copyright 1996 by the University of Washington
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notices appear in all copies and that both the
* above copyright notices and this permission notice appear in supporting
* documentation, and that the name of the University of Washington not be
* used in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. This software is made
* available "as is", and
* THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
* WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
* NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "mail.h"
#include "osdep.h"
#include <ctype.h>
#include <stdio.h>
#include <errno.h>
extern int errno; /* just in case */
#include "pop3.h"
#include "rfc822.h"
#include "misc.h"
/* POP3 mail routines */
/* Driver dispatch used by MAIL */
DRIVER pop3driver = {
"pop3", /* driver name */
(DRIVER *) NIL, /* next driver */
pop3_valid, /* mailbox is valid for us */
pop3_parameters, /* manipulate parameters */
pop3_find, /* find mailboxes */
pop3_find_bboards, /* find bboards */
pop3_find_all, /* find all mailboxes */
pop3_find_all_bboards, /* find all bboards */
pop3_subscribe, /* subscribe to mailbox */
pop3_unsubscribe, /* unsubscribe from mailbox */
pop3_subscribe_bboard, /* subscribe to bboard */
pop3_unsubscribe_bboard, /* unsubscribe from bboard */
pop3_create, /* create mailbox */
pop3_delete, /* delete mailbox */
pop3_rename, /* rename mailbox */
pop3_open, /* open mailbox */
pop3_close, /* close mailbox */
pop3_fetchfast, /* fetch message "fast" attributes */
pop3_fetchflags, /* fetch message flags */
pop3_fetchstructure, /* fetch message envelopes */
pop3_fetchheader, /* fetch message header only */
pop3_fetchtext, /* fetch message body only */
pop3_fetchbody, /* fetch message body section */
pop3_setflag, /* set message flag */
pop3_clearflag, /* clear message flag */
pop3_search, /* search for message based on criteria */
pop3_ping, /* ping mailbox to see if still alive */
pop3_check, /* check for new messages */
pop3_expunge, /* expunge deleted messages */
pop3_copy, /* copy messages to another mailbox */
pop3_move, /* move messages to another mailbox */
pop3_append, /* append string message to mailbox */
pop3_gc /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM pop3proto = {&pop3driver};
/* driver parameters */
static long pop3_maxlogintrials = MAXLOGINTRIALS;
static long pop3_port = 0;
static long pop3_loginfullname = NIL;
/* POP3 mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *pop3_valid (name)
char *name;
{
DRIVER *drv = NIL;
char mbx[MAILTMPLEN];
return ((*name != '*') && (drv = mail_valid_net (name,&pop3driver,NIL,mbx))
&& !strcmp (ucase (mbx),"INBOX")) ? drv : NIL;
}
/* News manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *pop3_parameters (function,value)
long function;
void *value;
{
switch ((int) function) {
case SET_MAXLOGINTRIALS:
pop3_maxlogintrials = (long) value;
break;
case GET_MAXLOGINTRIALS:
value = (void *) pop3_maxlogintrials;
break;
case SET_POP3PORT:
pop3_port = (long) value;
break;
case GET_POP3PORT:
value = (void *) pop3_port;
break;
case SET_LOGINFULLNAME:
pop3_loginfullname = (long) value;
break;
case GET_LOGINFULLNAME:
value = (void *) pop3_loginfullname;
break;
default:
value = NIL; /* error case */
break;
}
return value;
}
/* POP3 mail find list of mailboxes
* Accepts: mail stream
* pattern to search
*/
void pop3_find (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* POP3 mail find list of bboards
* Accepts: mail stream
* pattern to search
*/
void pop3_find_bboards (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* POP3 mail find list of all mailboxes
* Accepts: mail stream
* pattern to search
*/
void pop3_find_all (stream,pat)
MAILSTREAM *stream;
char *pat;
{
char *t = NIL,tmp[MAILTMPLEN];
if (stream && LOCAL) { /* have a mailbox stream open? */
/* always include INBOX for consistency */
sprintf (tmp,"{%s/POP3}INBOX",LOCAL->host);
if (pmatch (((*pat == '{') && (t = strchr (pat,'}'))) ? ++t : pat,"INBOX"))
mm_mailbox (tmp);
}
}
/* POP3 mail find list of all bboards
* Accepts: mail stream
* pattern to search
*/
void pop3_find_all_bboards (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* POP3 mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long pop3_subscribe (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return sm_subscribe (mailbox);
}
/* POP3 mail unsubscribe to mailbox
* Accepts: mail stream
* mailbox to delete from subscription list
* Returns: T on success, NIL on failure
*/
long pop3_unsubscribe (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return sm_unsubscribe (mailbox);
}
/* POP3 mail subscribe to bboard
* Accepts: mail stream
* bboard to add to subscription list
* Returns: T on success, NIL on failure
*/
long pop3_subscribe_bboard (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for POP3 */
}
/* POP3 mail unsubscribe to bboard
* Accepts: mail stream
* bboard to delete from subscription list
* Returns: T on success, NIL on failure
*/
long pop3_unsubscribe_bboard (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for POP3 */
}
/* POP3 mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long pop3_create (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for POP3 */
}
/* POP3 mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long pop3_delete (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for POP3 */
}
/* POP3 mail rename mailbox
* Accepts: mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long pop3_rename (stream,old,new)
MAILSTREAM *stream;
char *old;
char *new;
{
return NIL; /* never valid for POP3 */
}
/* POP3 mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *pop3_open (stream)
MAILSTREAM *stream;
{
long i,nmsgs;
char *s,tmp[MAILTMPLEN],usrnam[MAILTMPLEN],pwd[MAILTMPLEN];
NETMBX mb;
MESSAGECACHE *elt;
struct hostent *host_name;
/* return prototype for OP_PROTOTYPE call */
if (!stream) return &pop3proto;
mail_valid_net_parse (stream->mailbox,&mb);
if (LOCAL) { /* if recycle stream */
sprintf (tmp,"Closing connection to %s",LOCAL->host);
if (!stream->silent) mm_log (tmp,(long) NIL);
pop3_close (stream); /* do close action */
stream->dtb = &pop3driver; /* reattach this driver */
mail_free_cache (stream); /* clean up cache */
}
/* in case /debug switch given */
if (mb.dbgflag) stream->debug = T;
/* set up host with port override */
if (mb.port || pop3_port) sprintf (s = tmp,"%s:%ld",mb.host,
mb.port ? mb.port : pop3_port);
else s = mb.host; /* simple host name */
stream->local = fs_get (sizeof (POP3LOCAL));
LOCAL->host = cpystr (mb.host);
stream->sequence++; /* bump sequence number */
LOCAL->response = LOCAL->reply = LOCAL->buf = NIL;
LOCAL->header = LOCAL->body = NIL;
/* try to open connection */
if (!((LOCAL->tcpstream = tcp_open (s,"pop3",POP3TCPPORT)) &&
pop3_reply (stream))) {
if (LOCAL->reply) mm_log (LOCAL->reply,ERROR);
pop3_close (stream); /* failed, clean up */
}
else { /* got connection */
mm_log (LOCAL->reply,NIL); /* give greeting */
/* only so many tries to login */
for (i = 0; i < pop3_maxlogintrials; ++i) {
*pwd = 0; /* get password */
mm_login (pop3_loginfullname ? stream->mailbox :
tcp_host (LOCAL->tcpstream),usrnam,pwd,i);
/* abort if he refuses to give a password */
if (*pwd == '\0') i = pop3_maxlogintrials;
else { /* send login sequence */
if (pop3_send (stream,"USER",usrnam) && pop3_send (stream,"PASS",pwd))
break; /* login successful */
/* output failure and try again */
mm_log (LOCAL->reply,WARN);
}
}
/* give up if too many failures */
if (i >= pop3_maxlogintrials) {
mm_log (*pwd ? "Too many login failures":"Login aborted",ERROR);
pop3_close (stream);
}
else if (pop3_send (stream,"STAT",NIL)) {
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
nmsgs = strtol (LOCAL->reply,NIL,10);
/* create caches */
LOCAL->header = (char **) fs_get (nmsgs * sizeof (char *));
LOCAL->body = (char **) fs_get (nmsgs * sizeof (char *));
for (i = 0; i < nmsgs;) { /* initialize caches */
LOCAL->header[i] = LOCAL->body[i] = NIL;
/* instantiate elt */
elt = mail_elt (stream,++i);
elt->valid = elt->recent = T;
}
mail_exists(stream,nmsgs);/* notify upper level that messages exist */
mail_recent (stream,nmsgs);
/* notify if empty */
if (!(nmsgs || stream->silent)) mm_log ("Mailbox is empty",WARN);
}
else { /* error in STAT */
mm_log (LOCAL->reply,ERROR);
pop3_close (stream); /* too bad */
}
}
return LOCAL ? stream : NIL; /* if stream is alive, return to caller */
}
/* POP3 mail close
* Accepts: MAIL stream
*/
void pop3_close (stream)
MAILSTREAM *stream;
{
if (LOCAL) { /* only if a file is open */
if (LOCAL->tcpstream) { /* close POP3 connection */
pop3_send (stream,"QUIT",NIL);
mm_notify (stream,LOCAL->reply,BYE);
}
/* close POP3 connection */
if (LOCAL->tcpstream) tcp_close (LOCAL->tcpstream);
if (LOCAL->host) fs_give ((void **) &LOCAL->host);
if (LOCAL->response) fs_give ((void **) &LOCAL->response);
/* free local scratch buffer */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
pop3_gc (stream,GC_TEXTS); /* free local cache */
if (LOCAL->header) fs_give ((void **) &LOCAL->header);
if (LOCAL->body) fs_give ((void **) &LOCAL->body);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
}
}
/* POP3 mail fetch fast information
* Accepts: MAIL stream
* sequence
*/
void pop3_fetchfast (stream,sequence)
MAILSTREAM *stream;
char *sequence;
{
long i;
BODY *b;
/* ugly and slow */
if (stream && LOCAL && mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if (mail_elt (stream,i)->sequence)
pop3_fetchstructure (stream,i,&b);
}
/* POP3 mail fetch flags
* Accepts: MAIL stream
* sequence
*/
void pop3_fetchflags (stream,sequence)
MAILSTREAM *stream;
char *sequence;
{
return; /* no-op for local mail */
}
/* POP3 mail fetch envelope
* Accepts: MAIL stream
* message # to fetch
* pointer to return body
* Returns: envelope of this message, body returned in body value
*
* Fetches the "fast" information as well
*/
ENVELOPE *pop3_fetchstructure (stream,msgno,body)
MAILSTREAM *stream;
long msgno;
BODY **body;
{
char *h,*t;
LONGCACHE *lelt;
ENVELOPE **env;
STRING bs;
BODY **b;
unsigned long hdrsize;
unsigned long textsize = 0;
MESSAGECACHE *elt = mail_elt (stream,msgno);
if (stream->scache) { /* short cache */
if (msgno != stream->msgno){/* flush old poop if a different message */
mail_free_envelope (&stream->env);
mail_free_body (&stream->body);
}
stream->msgno = msgno;
env = &stream->env; /* get pointers to envelope and body */
b = &stream->body;
}
else { /* long cache */
lelt = mail_lelt (stream,msgno);
env = &lelt->env; /* get pointers to envelope and body */
b = &lelt->body;
}
if ((body && !*b) || !*env) { /* have the poop we need? */
mail_free_envelope (env); /* flush old envelope and body */
mail_free_body (b);
hdrsize = strlen (h = pop3_fetchheader (stream,msgno));
if (body) { /* only if want to parse body */
textsize = strlen (t = pop3_fetchtext_work (stream,msgno));
/* calculate message size */
elt->rfc822_size = hdrsize + textsize;
INIT (&bs,mail_string,(void *) t,textsize);
}
/* parse envelope and body */
rfc822_parse_msg (env,body ? b : NIL,h,hdrsize,body ? &bs : NIL,
tcp_localhost (LOCAL->tcpstream),LOCAL->buf);
/* parse date */
if (*env && (*env)->date) mail_parse_date (elt,(*env)->date);
if (!elt->month) mail_parse_date (elt,"01-JAN-1969 00:00:00 GMT");
}
if (body) *body = *b; /* return the body */
return *env; /* return the envelope */
}
/* POP3 mail fetch message header
* Accepts: MAIL stream
* message # to fetch
* Returns: message header in RFC822 format
*/
char *pop3_fetchheader (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
char *s,*t;
unsigned long i;
unsigned long bufpos = 0;
long m = msgno - 1;
if (!LOCAL->header[m]) { /* fetch header if don't have already */
if (pop3_send_num (stream,"RETR",msgno)) {
while (s = tcp_getline (LOCAL->tcpstream)) {
if (*s == '.') { /* possible end of text? */
if (s[1]) t = s + 1; /* pointer to true start of line */
else break; /* end of data */
}
else t = s; /* want the entire line */
/* ensure have enough room */
if (LOCAL->buflen < (bufpos + (i = strlen (t)) + 5))
fs_resize ((void **) &LOCAL->buf,
LOCAL->buflen += (MAXMESSAGESIZE + 1));
/* copy the text */
strncpy (LOCAL->buf + bufpos,t,i);
bufpos += i; /* set new buffer position */
LOCAL->buf[bufpos++] = '\015';
LOCAL->buf[bufpos++] = '\012';
/* found end of header? */
if (!(i || LOCAL->header[m])) {
LOCAL->buf[bufpos++] = '\0';
LOCAL->header[m] = cpystr (LOCAL->buf);
bufpos = 0; /* restart buffer collection */
}
fs_give ((void **) &s); /* free the line */
}
/* add final newline */
LOCAL->buf[bufpos++] = '\015';
LOCAL->buf[bufpos++] = '\012';
/* tie off string with NUL */
LOCAL->buf[bufpos++] = '\0';
if (LOCAL->header[m]) LOCAL->body[m] = cpystr (LOCAL->buf);
else LOCAL->header[m] = cpystr (LOCAL->buf);
}
else mail_elt (stream,msgno)->deleted = T;
}
return LOCAL->header[m] ? LOCAL->header[m] : "";
}
/* POP3 mail fetch message text (only)
body only;
* Accepts: MAIL stream
* message # to fetch
* Returns: message text in RFC822 format
*/
char *pop3_fetchtext (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
/* mark as seen */
mail_elt (stream,msgno)->seen = T;
return pop3_fetchtext_work (stream,msgno);
}
/* POP3 mail fetch message text work routine
* Accepts: MAIL stream
* message # to fetch
* Returns: message text in RFC822 format
*/
char *pop3_fetchtext_work (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
long m = msgno - 1;
/* fetch body if don't have already */
if (!LOCAL->header[m]) pop3_fetchheader (stream,msgno);
return LOCAL->body[m] ? LOCAL->body[m] : "";
}
/* POP3 fetch message body as a structure
* Accepts: Mail stream
* message # to fetch
* section specifier
* pointer to length
* Returns: pointer to section of message body
*/
char *pop3_fetchbody (stream,m,s,len)
MAILSTREAM *stream;
long m;
char *s;
unsigned long *len;
{
BODY *b;
PART *pt;
unsigned long i;
char *base;
unsigned long offset = 0;
MESSAGECACHE *elt = mail_elt (stream,m);
/* make sure have a body */
if (!(pop3_fetchstructure (stream,m,&b) && b && s && *s &&
((i = strtol (s,&s,10)) > 0) &&
(base = pop3_fetchtext_work (stream,m))))
return NIL;
do { /* until find desired body part */
/* multipart content? */
if (b->type == TYPEMULTIPART) {
pt = b->contents.part; /* yes, find desired part */
while (--i && (pt = pt->next));
if (!pt) return NIL; /* bad specifier */
/* note new body, check valid nesting */
if (((b = &pt->body)->type == TYPEMULTIPART) && !*s) return NIL;
offset = pt->offset; /* get new offset */
}
else if (i != 1) return NIL;/* otherwise must be section 1 */
/* need to go down further? */
if (i = *s) switch (b->type) {
case TYPEMESSAGE: /* embedded message, calculate new base */
offset = b->contents.msg.offset;
b = b->contents.msg.body; /* get its body, drop into multipart case */
case TYPEMULTIPART: /* multipart, get next section */
if ((*s++ == '.') && (i = strtol (s,&s,10)) > 0) break;
default: /* bogus subpart specification */
return NIL;
}
} while (i);
/* lose if body bogus */
if ((!b) || b->type == TYPEMULTIPART) return NIL;
elt->seen = T; /* mark as seen */
return rfc822_contents (&LOCAL->buf,&LOCAL->buflen,len,base + offset,
b->size.ibytes,b->encoding);
}
/* POP3 mail set flag
* Accepts: MAIL stream
* sequence
* flag(s)
*/
void pop3_setflag (stream,sequence,flag)
MAILSTREAM *stream;
char *sequence;
char *flag;
{
MESSAGECACHE *elt;
long i;
short f = pop3_getflags (stream,flag);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if (mail_sequence (stream,sequence)) for (i = 0; i < stream->nmsgs; i++)
if ((elt = mail_elt (stream,i + 1))->sequence) {
if (f&fSEEN) elt->seen=T; /* set all requested flags */
if (f&fDELETED) { /* deletion also purges the cache */
elt->deleted = T; /* mark deleted */
if (LOCAL->header[i]) fs_give ((void **) &LOCAL->header[i]);
LOCAL->body[i] = NIL;
}
if (f&fFLAGGED) elt->flagged = T;
if (f&fANSWERED) elt->answered = T;
}
}
/* POP3 mail clear flag
* Accepts: MAIL stream
* sequence
* flag(s)
*/
void pop3_clearflag (stream,sequence,flag)
MAILSTREAM *stream;
char *sequence;
char *flag;
{
MESSAGECACHE *elt;
long i;
short f = pop3_getflags (stream,flag);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if (mail_sequence (stream,sequence)) for (i = 0; i < stream->nmsgs; i++)
if ((elt = mail_elt (stream,i + 1))->sequence) {
/* clear all requested flags */
if (f&fSEEN) elt->seen = NIL;
if (f&fDELETED) elt->deleted = NIL;
if (f&fFLAGGED) elt->flagged = NIL;
if (f&fANSWERED) elt->answered = NIL;
}
}
/* POP3 mail search for messages
* Accepts: MAIL stream
* search criteria
*/
void pop3_search (stream,criteria)
MAILSTREAM *stream;
char *criteria;
{
long i,n;
char *d;
search_t f;
/* initially all searched */
for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->searched = T;
/* get first criterion */
if (criteria && (criteria = strtok (criteria," "))) {
/* for each criterion */
for (; criteria; (criteria = strtok (NIL," "))) {
f = NIL; d = NIL; n = 0; /* init then scan the criterion */
switch (*ucase (criteria)) {
case 'A': /* possible ALL, ANSWERED */
if (!strcmp (criteria+1,"LL")) f = pop3_search_all;
else if (!strcmp (criteria+1,"NSWERED")) f = pop3_search_answered;
break;
case 'B': /* possible BCC, BEFORE, BODY */
if (!strcmp (criteria+1,"CC"))
f = pop3_search_string (pop3_search_bcc,&d,&n);
else if (!strcmp (criteria+1,"EFORE"))
f = pop3_search_date (pop3_search_before,&n);
else if (!strcmp (criteria+1,"ODY"))
f = pop3_search_string (pop3_search_body,&d,&n);
break;
case 'C': /* possible CC */
if (!strcmp (criteria+1,"C"))
f = pop3_search_string (pop3_search_cc,&d,&n);
break;
case 'D': /* possible DELETED */
if (!strcmp (criteria+1,"ELETED")) f = pop3_search_deleted;
break;
case 'F': /* possible FLAGGED, FROM */
if (!strcmp (criteria+1,"LAGGED")) f = pop3_search_flagged;
else if (!strcmp (criteria+1,"ROM"))
f = pop3_search_string (pop3_search_from,&d,&n);
break;
case 'K': /* possible KEYWORD */
if (!strcmp (criteria+1,"EYWORD"))
f = pop3_search_flag (pop3_search_keyword,&d);
break;
case 'N': /* possible NEW */
if (!strcmp (criteria+1,"EW")) f = pop3_search_new;
break;
case 'O': /* possible OLD, ON */
if (!strcmp (criteria+1,"LD")) f = pop3_search_old;
else if (!strcmp (criteria+1,"N"))
f = pop3_search_date (pop3_search_on,&n);
break;
case 'R': /* possible RECENT */
if (!strcmp (criteria+1,"ECENT")) f = pop3_search_recent;
break;
case 'S': /* possible SEEN, SINCE, SUBJECT */
if (!strcmp (criteria+1,"EEN")) f = pop3_search_seen;
else if (!strcmp (criteria+1,"INCE"))
f = pop3_search_date (pop3_search_since,&n);
else if (!strcmp (criteria+1,"UBJECT"))
f = pop3_search_string (pop3_search_subject,&d,&n);
break;
case 'T': /* possible TEXT, TO */
if (!strcmp (criteria+1,"EXT"))
f = pop3_search_string (pop3_search_text,&d,&n);
else if (!strcmp (criteria+1,"O"))
f = pop3_search_string (pop3_search_to,&d,&n);
break;
case 'U': /* possible UN* */
if (criteria[1] == 'N') {
if (!strcmp (criteria+2,"ANSWERED")) f = pop3_search_unanswered;
else if (!strcmp (criteria+2,"DELETED")) f = pop3_search_undeleted;
else if (!strcmp (criteria+2,"FLAGGED")) f = pop3_search_unflagged;
else if (!strcmp (criteria+2,"KEYWORD"))
f = pop3_search_flag (pop3_search_unkeyword,&d);
else if (!strcmp (criteria+2,"SEEN")) f = pop3_search_unseen;
}
break;
default: /* we will barf below */
break;
}
if (!f) { /* if can't determine any criteria */
sprintf (LOCAL->buf,"Unknown search criterion: %.80s",criteria);
mm_log (LOCAL->buf,ERROR);
return;
}
/* run the search criterion */
for (i = 1; i <= stream->nmsgs; ++i)
if (mail_elt (stream,i)->searched && !(*f) (stream,i,d,n))
mail_elt (stream,i)->searched = NIL;
}
/* report search results to main program */
for (i = 1; i <= stream->nmsgs; ++i)
if (mail_elt (stream,i)->searched) mail_searched (stream,i);
}
}
/* POP3 mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
long pop3_ping (stream)
MAILSTREAM *stream;
{
return pop3_send (stream,"NOOP",NIL);
}
/* POP3 mail check mailbox
* Accepts: MAIL stream
*/
void pop3_check (stream)
MAILSTREAM *stream;
{
if (pop3_ping (stream)) mm_log ("Check completed",NIL);
}
/* POP3 mail expunge mailbox
* Accepts: MAIL stream
*/
void pop3_expunge (stream)
MAILSTREAM *stream;
{
MESSAGECACHE *elt;
unsigned long i,n = 0;
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->deleted && !elt->data1 &&
(elt->data1 = pop3_send_num (stream,"DELE",i))) n++;
if (!stream->silent) { /* only if not silent */
if (n) { /* did we expunge anything? */
sprintf (LOCAL->buf,"Expunged %ld messages",n);
mm_log (LOCAL->buf,(long) NIL);
}
else mm_log ("No messages deleted, so no update needed",(long) NIL);
}
}
/* POP3 mail copy message(s)
s;
* Accepts: MAIL stream
* sequence
* destination mailbox
* Returns: T if copy successful, else NIL
*/
long pop3_copy (stream,sequence,mailbox)
MAILSTREAM *stream;
char *sequence;
char *mailbox;
{
mm_log ("Copy not valid for POP3",ERROR);
return NIL;
}
/* POP3 mail move message(s)
s;
* Accepts: MAIL stream
* sequence
* destination mailbox
* Returns: T if move successful, else NIL
*/
long pop3_move (stream,sequence,mailbox)
MAILSTREAM *stream;
char *sequence;
char *mailbox;
{
mm_log ("Move not valid for POP3",ERROR);
return NIL;
}
/* POP3 mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* stringstruct of messages to append
* Returns: T if append successful, else NIL
*/
long pop3_append (stream,mailbox,flags,date,message)
MAILSTREAM *stream;
char *mailbox;
char *flags;
char *date;
STRING *message;
{
mm_log ("Append not valid for POP3",ERROR);
return NIL;
}
/* POP3 garbage collect stream
* Accepts: Mail stream
* garbage collection flags
*/
void pop3_gc (stream,gcflags)
MAILSTREAM *stream;
long gcflags;
{
unsigned long i;
if (!stream->halfopen) /* never on half-open stream */
if (gcflags & GC_TEXTS) /* garbage collect texts? */
/* flush texts from cache */
for (i = 0; i < stream->nmsgs; i++) {
if (LOCAL->header[i]) fs_give ((void **) &LOCAL->header[i]);
LOCAL->body[i] = NIL;
}
}
/* Internal routines */
/* Post Office Protocol 3 send command with number argument
* Accepts: MAIL stream
* command
* number
* Returns: T if successful, NIL if failure
*/
long pop3_send_num (stream,command,n)
MAILSTREAM *stream;
char *command;
unsigned long n;
{
char tmp[MAILTMPLEN];
sprintf (tmp,"%ld",n);
return pop3_send (stream,command,tmp);
}
/* Post Office Protocol 3 send command
* Accepts: MAIL stream
* command
* command argument
* Returns: T if successful, NIL if failure
*/
long pop3_send (stream,command,args)
MAILSTREAM *stream;
char *command;
char *args;
{
char tmp[MAILTMPLEN];
if (!LOCAL->tcpstream) return pop3_fake (stream,"No-op dead stream");
/* build the complete command */
if (args) sprintf (tmp,"%s %s",command,args);
else strcpy (tmp,command);
if (stream->debug) mm_dlog (tmp);
strcat (tmp,"\015\012");
/* send the command */
return tcp_soutr (LOCAL->tcpstream,tmp) ? pop3_reply (stream) :
pop3_fake (stream,"POP3 connection broken in command");
}
/* Post Office Protocol 3 get reply
* Accepts: MAIL stream
* Returns: T if success reply, NIL if error reply
*/
long pop3_reply (stream)
MAILSTREAM *stream;
{
char *s;
if (!LOCAL->tcpstream) return pop3_fake (stream,"No-op dead stream");
/* flush old reply */
if (LOCAL->response) fs_give ((void **) &LOCAL->response);
/* get reply */
if (!(LOCAL->response = tcp_getline (LOCAL->tcpstream)))
return pop3_fake (stream,"POP3 connection broken in response");
if (stream->debug) mm_dlog (LOCAL->response);
LOCAL->reply = (s = strchr (LOCAL->response,' ')) ? s + 1 : LOCAL->response;
/* return success or failure */
return (*LOCAL->response =='+') ? T : NIL;
}
/* Post Office Protocol 3 set fake error
* Accepts: MAIL stream
* error text
* Returns: NIL, always
*/
long pop3_fake (stream,text)
MAILSTREAM *stream;
char *text;
{
mm_notify (stream,text,BYE); /* send bye alert */
if (LOCAL->tcpstream) tcp_close (LOCAL->tcpstream);
LOCAL->tcpstream = NIL; /* farewell, dear TCP stream */
/* flush any old reply */
if (LOCAL->response) fs_give ((void **) &LOCAL->response);
LOCAL->reply = text; /* set up pseudo-reply string */
return NIL; /* return error code */
}
/* Parse flag list
* Accepts: MAIL stream
* flag list as a character string
* Returns: flag command list
*/
short pop3_getflags (stream,flag)
MAILSTREAM *stream;
char *flag;
{
char *t,tmp[MAILTMPLEN],err[MAILTMPLEN];
short f = 0;
short i,j;
if (flag && *flag) { /* no-op if no flag string */
/* check if a list and make sure valid */
if ((i = (*flag == '(')) ^ (flag[strlen (flag)-1] == ')')) {
mm_log ("Bad flag list",ERROR);
return NIL;
}
/* copy the flag string w/o list construct */
strncpy (tmp,flag+i,(j = strlen (flag) - (2*i)));
tmp[j] = '\0';
t = ucase (tmp); /* uppercase only from now on */
while (t && *t) { /* parse the flags */
if (*t == '\\') { /* system flag? */
switch (*++t) { /* dispatch based on first character */
case 'S': /* possible \Seen flag */
if (t[1] == 'E' && t[2] == 'E' && t[3] == 'N') i = fSEEN;
t += 4; /* skip past flag name */
break;
case 'D': /* possible \Deleted flag */
if (t[1] == 'E' && t[2] == 'L' && t[3] == 'E' && t[4] == 'T' &&
t[5] == 'E' && t[6] == 'D') i = fDELETED;
t += 7; /* skip past flag name */
break;
case 'F': /* possible \Flagged flag */
if (t[1] == 'L' && t[2] == 'A' && t[3] == 'G' && t[4] == 'G' &&
t[5] == 'E' && t[6] == 'D') i = fFLAGGED;
t += 7; /* skip past flag name */
break;
case 'A': /* possible \Answered flag */
if (t[1] == 'N' && t[2] == 'S' && t[3] == 'W' && t[4] == 'E' &&
t[5] == 'R' && t[6] == 'E' && t[7] == 'D') i = fANSWERED;
t += 8; /* skip past flag name */
break;
default: /* unknown */
i = 0;
break;
}
/* add flag to flags list */
if (i && ((*t == '\0') || (*t++ == ' '))) f |= i;
}
else { /* no user flags yet */
t = strtok (t," "); /* isolate flag name */
sprintf (err,"Unknown flag: %.80s",t);
t = strtok (NIL," "); /* get next flag */
mm_log (err,ERROR);
}
}
}
return f;
}
/* Search support routines
* Accepts: MAIL stream
* message number
* pointer to additional data
* pointer to temporary buffer
* Returns: T if search matches, else NIL
*/
char pop3_search_all (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return T; /* ALL always succeeds */
}
char pop3_search_answered (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->answered ? T : NIL;
}
char pop3_search_deleted (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->deleted ? T : NIL;
}
char pop3_search_flagged (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->flagged ? T : NIL;
}
char pop3_search_keyword (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return NIL; /* keywords not supported yet */
}
char pop3_search_new (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
MESSAGECACHE *elt = mail_elt (stream,msgno);
return (elt->recent && !elt->seen) ? T : NIL;
}
char pop3_search_old (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->recent ? NIL : T;
}
char pop3_search_recent (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->recent ? T : NIL;
}
char pop3_search_seen (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->seen ? T : NIL;
}
char pop3_search_unanswered (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->answered ? NIL : T;
}
char pop3_search_undeleted (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->deleted ? NIL : T;
}
char pop3_search_unflagged (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->flagged ? NIL : T;
}
char pop3_search_unkeyword (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return T; /* keywords not supported yet */
}
char pop3_search_unseen (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->seen ? NIL : T;
}
char pop3_search_before (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return (char) (pop3_msgdate (stream,msgno) < n);
}
char pop3_search_on (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return (char) (pop3_msgdate (stream,msgno) == n);
}
char pop3_search_since (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
/* everybody interprets "since" as .GE. */
return (char) (pop3_msgdate (stream,msgno) >= n);
}
unsigned long pop3_msgdate (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
MESSAGECACHE *elt = mail_elt (stream,msgno);
/* get date if don't have it yet */
if (!elt->day) pop3_fetchstructure (stream,msgno,NIL);
return (long) (elt->year << 9) + (elt->month << 5) + elt->day;
}
char pop3_search_body (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = pop3_fetchtext_work (stream,msgno);
return (t && search (t,(unsigned long) strlen (t),d,n));
}
char pop3_search_subject (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = pop3_fetchstructure (stream,msgno,NIL)->subject;
return t ? search (t,strlen (t),d,n) : NIL;
}
char pop3_search_text (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = pop3_fetchheader (stream,msgno);
return (t && search (t,strlen (t),d,n)) ||
pop3_search_body (stream,msgno,d,n);
}
char pop3_search_bcc (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = pop3_fetchstructure (stream,msgno,NIL)->bcc;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
char pop3_search_cc (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = pop3_fetchstructure (stream,msgno,NIL)->cc;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
char pop3_search_from (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = pop3_fetchstructure (stream,msgno,NIL)->from;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
char pop3_search_to (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = pop3_fetchstructure (stream,msgno,NIL)->to;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
/* Search parsers */
/* Parse a date
* Accepts: function to return
* pointer to date integer to return
* Returns: function to return
*/
search_t pop3_search_date (f,n)
search_t f;
long *n;
{
long i;
char *s;
MESSAGECACHE elt;
/* parse the date and return fn if OK */
return (pop3_search_string (f,&s,&i) && mail_parse_date (&elt,s) &&
(*n = (elt.year << 9) + (elt.month << 5) + elt.day)) ? f : NIL;
}
/* Parse a flag
* Accepts: function to return
* pointer to string to return
* Returns: function to return
*/
search_t pop3_search_flag (f,d)
search_t f;
char **d;
{
/* get a keyword, return if OK */
return (*d = strtok (NIL," ")) ? f : NIL;
}
/* Parse a string
* Accepts: function to return
* pointer to string to return
* pointer to string length to return
* Returns: function to return
*/
search_t pop3_search_string (f,d,n)
search_t f;
char **d;
long *n;
{
char *end = " ";
char *c = strtok (NIL,""); /* remainder of criteria */
if (!c) return NIL; /* missing argument */
switch (*c) { /* see what the argument is */
case '{': /* literal string */
*n = strtol (c+1,d,10); /* get its length */
if ((*(*d)++ == '}') && (*(*d)++ == '\015') && (*(*d)++ == '\012') &&
(!(*(c = *d + *n)) || (*c == ' '))) {
char e = *--c;
*c = DELIM; /* make sure not a space */
strtok (c," "); /* reset the strtok mechanism */
*c = e; /* put character back */
break;
}
case '\0': /* catch bogons */
case ' ':
return NIL;
case '"': /* quoted string */
if (strchr (c+1,'"')) end = "\"";
else return NIL;
default: /* atomic string */
if (*d = strtok (c,end)) *n = strlen (*d);
else return NIL;
break;
}
return f;
}