/* * Program: IMAP4rev1 server * * 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: 5 November 1990 * Last Edited: 27 January 1999 * * Copyright 1999 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 notice appears in all copies and that both the * above copyright notice 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. * */ /* Primary I/O calls */ #define PBIN getchar /* primary byte input */ /* primary string input */ #define PSIN(s,n) fgets (s,n,stdin) #define PBOUT(c) putchar (c) /* primary byte output */ /* primary string output */ #define PSOUT(s) fputs (s,stdout) #define PFLUSH fflush (stdout) /* flush primary output */ #define CRLF PSOUT ("\015\012") /* primary output terpri */ /* Parameter files */ #include "mail.h" #include "osdep.h" #include "rfc822.h" #include #include #include extern int errno; /* just in case */ #include #include #include "misc.h" #define LOGINTIMEOUT 60*3 /* not logged in autologout timer */ #define TIMEOUT 60*30 /* logged in autologout timer */ #define ALERTTIMEOUT 60 /* alert check timer */ #define IDLETIMEOUT 60 /* IDLE command poll timer */ #define CHECKTIMEOUT 15*60 /* IDLE command last checkpoint timer */ #define LITSTKLEN 20 /* length of literal stack */ #define MAXCLIENTLIT 10000 /* maximum non-APPEND client literal size */ #define TMPLEN 8192 /* size of temporary buffers */ /* Server states */ #define LOGIN 0 #define SELECT 1 #define OPEN 2 #define LOGOUT 3 /* Body text fetching */ typedef struct text_args { char *section; /* body section */ STRINGLIST *lines; /* header lines */ unsigned long first; /* first octet to fetch */ unsigned long last; /* number of octets to fetch */ long flags; /* flags */ } TEXTARGS; /* Message pointer */ typedef struct msg_data { MAILSTREAM *stream; /* stream */ unsigned long msgno; /* message number */ } MSGDATA; /* Function prototypes */ int main (int argc,char *argv[]); void ping_mailbox (unsigned long uid); time_t palert (char *file,time_t oldtime); void msg_string_init (STRING *s,void *data,unsigned long size); char msg_string_next (STRING *s); void msg_string_setpos (STRING *s,unsigned long i); void new_flags (MAILSTREAM *stream); void clkint (void); void kodint (void); void hupint (void); void trmint (void); void slurp (char *s,int n); char inchar (void); char *flush (void); char *parse_astring (char **arg,unsigned long *i,char *del); char *snarf (char **arg); char *snarf_list (char **arg); STRINGLIST *parse_stringlist (char **s,int *list); long parse_criteria (SEARCHPGM *pgm,char **arg,unsigned long maxmsg, unsigned long maxuid); long parse_criterion (SEARCHPGM *pgm,char **arg,unsigned long msgmsg, unsigned long maxuid); long crit_date (unsigned short *date,char **arg); long crit_date_work (unsigned short *date,char **arg); long crit_set (SEARCHSET **set,char **arg,unsigned long maxima); long crit_number (unsigned long *number,char **arg); long crit_string (STRINGLIST **string,char **arg); void fetch (char *t,unsigned long uid); typedef void (*fetchfn_t) (unsigned long i,void *args); void fetch_work (char *t,unsigned long uid,fetchfn_t f[],void *fa[]); void fetch_bodystructure (unsigned long i,void *args); void fetch_body (unsigned long i,void *args); void fetch_body_part_mime (unsigned long i,void *args); void fetch_body_part_contents (unsigned long i,void *args); void fetch_body_part_header (unsigned long i,void *args); void fetch_body_part_text (unsigned long i,void *args); void remember (unsigned long uid,char *id,SIZEDTEXT *st); void fetch_envelope (unsigned long i,void *args); void fetch_encoding (unsigned long i,void *args); void changed_flags (unsigned long i,int f); void fetch_rfc822_header_lines (unsigned long i,void *args); void fetch_rfc822_header_lines_not (unsigned long i,void *args); void fetch_flags (unsigned long i,void *args); void put_flag (int *c,char *s); void fetch_internaldate (unsigned long i,void *args); void fetch_uid (unsigned long i,void *args); void fetch_rfc822 (unsigned long i,void *args); void fetch_rfc822_header (unsigned long i,void *args); void fetch_rfc822_size (unsigned long i,void *args); void fetch_rfc822_text (unsigned long i,void *args); void penv (ENVELOPE *env); void pbodystructure (BODY *body); void pbody (BODY *body); void pparam (PARAMETER *param); void paddr (ADDRESS *a); void pnum (unsigned long i); void pstring (char *s); void pnstring (char *label,SIZEDTEXT *st); void pastring (char *s); void pbodypartstring (unsigned long msgno,char *id,SIZEDTEXT *st,TEXTARGS *ta); void pstringorlist (STRINGLIST *s); void pstringlist (STRINGLIST *s); void psizedtext (SIZEDTEXT *s); void ptext (SIZEDTEXT *s); void pthread (THREADNODE *thr); long nameok (char *ref,char *name); char *bboardname (char *cmd,char *name); char *imap_responder (void *challenge,unsigned long clen,unsigned long *rlen); long proxycopy (MAILSTREAM *stream,char *sequence,char *mailbox,long options); void mm_list_work (char *what,int delimiter,char *name,long attributes); char *lasterror (void); /* Global storage */ char *version = "12.250"; /* version number of this server */ time_t alerttime = 0; /* time of last alert */ time_t sysalerttime = 0; /* time of last system alert */ time_t useralerttime = 0; /* time of last user alert */ time_t lastcheck = 0; /* time of last checkpoint */ int state = LOGIN; /* server state */ int trycreate = 0; /* saw a trycreate */ int finding = NIL; /* doing old FIND command */ int anonymous = 0; /* non-zero if anonymous */ int critical = NIL; /* non-zero if in critical code */ int quell_events = NIL; /* non-zero if in FETCH response */ int existsquelled = NIL; /* non-zero if an EXISTS was quelled */ MAILSTREAM *stream = NIL; /* mailbox stream */ DRIVER *curdriver = NIL; /* note current driver */ MAILSTREAM *tstream = NIL; /* temporary mailbox stream */ unsigned long nmsgs =0xffffffff;/* last reported # of messages and recent */ unsigned long recent = 0xffffffff; char *user = NIL; /* user name */ char *pass = NIL; /* password */ char cmdbuf[TMPLEN]; /* command buffer */ char *tag; /* tag portion of command */ char *cmd; /* command portion of command */ char *arg; /* pointer to current argument of command */ char *lstwrn = NIL; /* last warning message from c-client */ char *lsterr = NIL; /* last error message from c-client */ char *response = NIL; /* command response */ int litsp = 0; /* literal stack pointer */ char *litstk[LITSTKLEN]; /* stack to hold literals */ unsigned long lastuid = -1; /* last fetched uid */ char *lastid = NIL; /* last fetched body id for this message */ SIZEDTEXT lastst = {NIL,0}; /* last sizedtext */ /* Response texts which appear in multiple places */ char *win = "%.80s OK %.80s completed\015\012"; char *altwin = "%.80s OK %.900s\015\012"; char *lose = "%.80s NO %.80s failed: %.900s\015\012"; char *losetry = "%.80s NO [TRYCREATE] %.80s failed: %.900s\015\012"; char *misarg = "%.80s BAD Missing required argument to %.80s\015\012"; char *badarg = "%.80s BAD Argument given to %.80s when none expected\015\012"; char *badseq = "%.80s BAD Bogus sequence in %.80s\015\012"; char *badatt = "%.80s BAD Bogus attribute list in %.80s\015\012"; char *argrdy = "+ Ready for argument\015\012"; /* Message string driver for message stringstructs */ STRINGDRIVER msg_string = { msg_string_init, /* initialize string structure */ msg_string_next, /* get next byte in string structure */ msg_string_setpos /* set position in string structure */ }; /* Main program */ int main (int argc,char *argv[]) { unsigned long i,j,k,m,uid; long f; char *s,*t,*u,*v,tmp[MAILTMPLEN]; struct stat sbuf; /* initialize server */ server_init (argv[0],"imap","imaps","imap",clkint,kodint,hupint,trmint); #include "linkage.c" /* forbid automatic untagged expunge */ mail_parameters (NIL,SET_EXPUNGEATPING,NIL); s = myusername_full (&i); /* get user name and flags */ switch (i) { case MU_NOTLOGGEDIN: t = "OK"; /* not logged in, ordinary startup */ break; case MU_ANONYMOUS: anonymous = T; /* anonymous user, fall into default */ s = "ANONYMOUS"; case MU_LOGGEDIN: t = "PREAUTH"; /* already logged in, pre-authorized */ user = cpystr (s); /* copy user name */ pass = cpystr ("*"); /* set fake password */ state = SELECT; /* enter select state */ break; default: fatal ("Unknown state from myusername_full()"); } PSOUT ("* "); PSOUT (t); PBOUT (' '); PSOUT (tcp_serverhost ()); PSOUT (" IMAP4rev1 v"); PSOUT (version); PSOUT (" server ready\015\012"); PFLUSH; /* dump output buffer */ if (state == SELECT) /* do this after the banner */ syslog (LOG_INFO,"Preauthenticated user=%.80s host=%.80s", user,tcp_clienthost ()); mail_parameters (NIL,SET_MAILPROXYCOPY,(void *) proxycopy); do { /* command processing loop */ slurp (cmdbuf,TMPLEN); /* slurp command */ /* no more last error or literal */ if (lstwrn) fs_give ((void **) &lstwrn); if (lsterr) fs_give ((void **) &lsterr); while (litsp) fs_give ((void **) &litstk[--litsp]); /* find end of line */ if (!strchr (cmdbuf,'\012')) { if (t = strchr (cmdbuf,' ')) *t = '\0'; if ((t - cmdbuf) > 100) t = NIL; flush (); /* flush excess */ if (state == LOGIN) /* error if NLI */ syslog (LOG_INFO,"Line too long before authentication host=%.80s", tcp_clienthost ()); sprintf (tmp,response,t ? cmdbuf : "*"); PSOUT (tmp); } else if (!(tag = strtok (cmdbuf," \015\012"))) { if (state == LOGIN) /* error if NLI */ syslog (LOG_INFO,"Null command before authentication host=%.80s", tcp_clienthost ()); PSOUT ("* BAD Null command\015\012"); } else if (strlen (tag) > 50) PSOUT ("* BAD Excessively long tag\015\012"); else if (!(cmd = strtok (NIL," \015\012"))) { if (state == LOGIN) /* error if NLI */ syslog (LOG_INFO,"Missing command before authentication host=%.80s", tcp_clienthost ()); PSOUT (tag); PSOUT (" BAD Missing command\015\012"); } else { /* parse command */ response = win; /* set default response */ finding = NIL; /* no longer FINDing */ ucase (cmd); /* canonicalize command case */ /* UID command? */ if (!strcmp (cmd,"UID") && strtok (NIL," \015\012")) { uid = T; /* a UID command */ cmd[3] = ' '; /* restore the space delimiter */ ucase (cmd); /* make sure command all uppercase */ } else uid = NIL; /* not a UID command */ /* snarf argument */ arg = strtok (NIL,"\015\012"); /* these commands always valid */ if (!strcmp (cmd,"NOOP")) { if (arg) response = badarg; else if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } else if (!strcmp (cmd,"LOGOUT")) { if (arg) response = badarg; else { /* time to say farewell */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); if (state == OPEN) mail_close (stream); state = LOGOUT; stream = NIL; PSOUT ("* BYE "); PSOUT (mylocalhost ()); PSOUT (" IMAP4rev1 server terminating connection\015\012"); } } else if (!strcmp (cmd,"CAPABILITY")) { if (arg) response = badarg; else { AUTHENTICATOR *auth = mail_lookup_auth (1); THREADER *thr = (THREADER *) mail_parameters (NIL,GET_THREADERS,NIL); PSOUT ("* CAPABILITY IMAP4 IMAP4REV1 NAMESPACE IDLE SCAN SORT MAILBOX-REFERRALS LOGIN-REFERRALS"); #ifdef NETSCAPE_BRAIN_DAMAGE PSOUT (" X-NETSCAPE"); #endif while (auth) { if (auth->server) { PSOUT (" AUTH="); PSOUT (auth->name); } auth = auth->next; } if (!stat (ANOFILE,&sbuf)) PSOUT (" AUTH=ANONYMOUS"); while (thr) { PSOUT (" THREAD="); PSOUT (thr->name); thr = thr->next; } CRLF; } if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } #ifdef NETSCAPE_BRAIN_DAMAGE else if (!strcmp (cmd,"NETSCAPE")) { PSOUT ("* OK [NETSCAPE]\015\012* VERSION 1.0 UNIX\015\012* ACCOUNT-URL \""); PSOUT (NETSCAPE_BRAIN_DAMAGE); PBOUT ('"'); CRLF; } #endif else switch (state) { /* dispatch depending upon state */ case LOGIN: /* waiting to get logged in */ /* new style authentication */ if (!strcmp (cmd,"AUTHENTICATE")) { if (user) fs_give ((void **) &user); if (pass) fs_give ((void **) &pass); /* single argument */ if (!(s = snarf (&arg))) response = misarg; else if (arg) response = badarg; else if (!strcmp (ucase (s),"ANONYMOUS") && !stat (ANOFILE,&sbuf)) { if ((s = imap_responder ("",0,NIL)) && anonymous_login (argc,argv)) { anonymous = T; /* note we are anonymous */ user = cpystr ("ANONYMOUS"); state = SELECT; /* make select */ syslog (LOG_INFO,"Authenticated anonymous=%.80s host=%.80s",s, tcp_clienthost ()); fs_give ((void **) &s); } else response ="%.80s NO AUTHENTICATE ANONYMOUS cancelled\015\012"; } else if (user = cpystr (mail_auth (s,imap_responder,argc,argv))) { state = SELECT; syslog (LOG_INFO,"Authenticated user=%.80s host=%.80s", user,tcp_clienthost ()); } else { lsterr = cpystr (s); response = "%.80s NO %.80s %.80s failed\015\012"; syslog (LOG_INFO,"AUTHENTICATE %.80s failure host=%.80s",s, tcp_clienthost ()); } } /* plaintext login with password */ else if (!strcmp (cmd,"LOGIN")) { if (user) fs_give ((void **) &user); if (pass) fs_give ((void **) &pass); /* two arguments */ if (!((user = cpystr (snarf (&arg))) && (pass = cpystr (snarf (&arg))))) response = misarg; else if (arg) response = badarg; /* see if we allow anonymous */ else if (((user[0] == 'a') || (user[0] == 'A')) && ((user[1] == 'n') || (user[1] == 'N')) && ((user[2] == 'o') || (user[2] == 'O')) && ((user[3] == 'n') || (user[3] == 'N')) && ((user[4] == 'y') || (user[4] == 'Y')) && ((user[5] == 'm') || (user[5] == 'M')) && ((user[6] == 'o') || (user[6] == 'O')) && ((user[7] == 'u') || (user[7] == 'U')) && ((user[8] == 's') || (user[8] == 'S')) && !user[9] && !stat (ANOFILE,&sbuf) && anonymous_login (argc,argv)) { anonymous = T; /* note we are anonymous */ ucase (user); /* make all uppercase for consistency */ state = SELECT; /* make select */ syslog (LOG_INFO,"Login anonymous=%.80s host=%.80s",pass, tcp_clienthost ()); } /* see if username and password are OK */ else if (server_login (user,pass,argc,argv)) { state = SELECT; syslog (LOG_INFO,"Login user=%.80s host=%.80s",user, tcp_clienthost ()); } else response = "%.80s NO %.80s failed\015\012"; } else response = "%.80s BAD Command unrecognized/login please: %.80s\015\012"; break; case OPEN: /* valid only when mailbox open */ /* fetch mailbox attributes */ if (!strcmp (cmd,"FETCH") || !strcmp (cmd,"UID FETCH")) { if (!(arg && (s = strtok (arg," ")) && (t = strtok(NIL,"\015\012")))) response = misarg; else if (uid ? mail_uid_sequence (stream,s) : mail_sequence (stream,s)) fetch (t,uid); else response = badseq; } /* store mailbox attributes */ else if (!strcmp (cmd,"STORE") || !strcmp (cmd,"UID STORE")) { /* must have three arguments */ if (arg && (s = strtok (arg," ")) && (v = strtok (NIL," ")) && (t = strtok (NIL,"\015\012"))) { f = ST_SET | (uid ? ST_UID : NIL)|((v[5]&&v[6]) ? ST_SILENT : NIL); if (!strcmp (ucase (v),"FLAGS") || !strcmp (v,"FLAGS.SILENT")) { strcpy (tmp,"\\Answered \\Flagged \\Deleted \\Draft \\Seen"); for (i = 0, u = tmp; (i < NUSERFLAGS) && (v = stream->user_flags[i]); i++) if (strlen (v) < ((size_t) (MAILTMPLEN - ((u += strlen (u)) + 2 - tmp)))) { *u++ = ' '; /* write next flag */ strcpy (u,v); } mail_flag (stream,s,tmp,f & ~ST_SET); } else if (!strcmp (v,"-FLAGS") || !strcmp (v,"-FLAGS.SILENT")) f &= ~ST_SET; /* clear flags */ else if (strcmp (v,"+FLAGS") && strcmp (v,"+FLAGS.SILENT")) { response = badatt; break; } /* find last keyword */ for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; i++); mail_flag (stream,s,t,f); /* any new keywords appeared? */ if (i < NUSERFLAGS && stream->user_flags[i]) new_flags (stream); /* return flags if silence not wanted */ if (!(f & ST_SILENT) && (uid ? mail_uid_sequence (stream,s) : mail_sequence(stream,s))) for (i = 1; i <= nmsgs; i++) if (mail_elt(stream,i)->sequence) mail_elt (stream,i)->spare2 = T; } else response = misarg; } /* fetch partial mailbox attributes */ else if (!strcmp (cmd,"PARTIAL")) { SIZEDTEXT st; if (!(arg && (m = strtoul (arg,&s,10)) && (t = strtok (s," ")) && (s = strtok (NIL,"\015\012")) && (j = strtoul (s,&s,10)) && (k = strtoul (s,&s,10)))) response = misarg; else if (s && *s) response = badarg; else if (m > nmsgs) response = badseq; else { /* looks good */ int sf = mail_elt (stream,m)->seen; if (!strcmp (ucase (t),"RFC822")) st.data = (unsigned char *) mail_fetch_message (stream,m,&st.size,NIL); else if (!strcmp (t,"RFC822.PEEK")) st.data = (unsigned char *) mail_fetch_message (stream,m,&st.size,FT_PEEK); else if (!strcmp (t,"RFC822.HEADER")) st.data = (unsigned char *) mail_fetch_header (stream,m,NIL,NIL,&st.size,FT_PEEK); else if (!strcmp (t,"RFC822.TEXT")) st.data = (unsigned char *) mail_fetch_text (stream,m,NIL,&st.size,NIL); else if (!strcmp (t,"RFC822.TEXT.PEEK")) st.data = (unsigned char *) mail_fetch_text (stream,m,NIL,&st.size,FT_PEEK); else if (!strncmp (t,"BODY[",5) && (v = strchr(t+5,']')) && !v[1]){ strncpy (tmp,t+5,i = v - (t+5)); tmp[i] = '\0'; /* tie off body part */ st.data = (unsigned char *) mail_fetch_body (stream,m,tmp,&st.size,NIL); } else if (!strncmp (t,"BODY.PEEK[",10) && (v = strchr (t+10,']')) && !v[1]) { strncpy (tmp,t+10,i = v - (t+10)); tmp[i] = '\0'; /* tie off body part */ st.data = (unsigned char *) mail_fetch_body (stream,m,tmp,&st.size,FT_PEEK); } else response = badatt, st.data = NIL; if (st.data) { /* got a string? */ PSOUT ("* "); pnum (m); PSOUT (" FETCH ("); PSOUT (t); PBOUT (' '); /* start position larger than text size */ if (st.size <= --j) PSOUT ("NIL"); else { /* output as sized text */ st.data += j; if ((st.size -= j) > k) st.size = k; psizedtext (&st); } changed_flags (m,sf); PSOUT (")\015\012"); } } } /* check for new mail */ else if (!strcmp (cmd,"CHECK")) { /* no arguments */ if (arg) response = badarg; else if (!anonymous) { mail_check (stream); /* remember last check time */ lastcheck = time (0); } } /* expunge deleted messages */ else if (!(anonymous || strcmp (cmd,"EXPUNGE"))) { /* no arguments */ if (arg) response = badarg; else { mail_expunge (stream); /* remember last checkpoint */ lastcheck = time (0); } } /* close mailbox */ else if (!strcmp (cmd,"CLOSE")) { /* no arguments */ if (arg) response = badarg; else { lastuid = -1; /* no last uid */ if (lastid) fs_give ((void **) &lastid); if (lastst.data) fs_give ((void **) &lastst.data); stream = mail_close_full (stream,anonymous ? NIL : CL_EXPUNGE); state = SELECT; /* no longer opened */ lastcheck = 0; /* no last checkpoint */ } } else if (!anonymous && /* copy message(s) */ (!strcmp (cmd,"COPY") || !strcmp (cmd,"UID COPY"))) { trycreate = NIL; /* no trycreate status */ if (!(arg && (s = strtok (arg," ")) && (arg = strtok(NIL,"\015\012")) && (t = snarf (&arg)))) response = misarg; else if (arg) response = badarg; else if (!nmsgs) response = "%.80s NO Mailbox is empty\015\012"; /* try copy */ if (!(stream->dtb->copy) (stream,s,t,uid ? CP_UID : NIL)) { response = trycreate ? losetry : lose; if (!lsterr) lsterr = cpystr ("No such destination mailbox"); } } /* sort mailbox */ else if (!strcmp (cmd,"SORT") || !strcmp (cmd,"UID SORT")) { /* must have four arguments */ if (!(arg && (*arg == '(') && (t = strchr (s = arg + 1,')')) && (t[1] == ' ') && (*(arg = t + 2)))) response = misarg; else { /* read criteria */ SEARCHPGM *spg = NIL; char *cs = NIL; SORTPGM *pgm = NIL,*pg = NIL; unsigned long *slst,*sl; *t = NIL; /* tie off criteria list */ s = strtok (ucase (s)," "); do { /* parse sort attributes */ if (pg) pg = pg->next = mail_newsortpgm (); else pgm = pg = mail_newsortpgm (); if (!strcmp (s,"REVERSE")) { pg->reverse = T; if (!(s = strtok (NIL," "))) { s = ""; /* end of attributes */ break; } } if (!strcmp (s,"DATE")) pg->function = SORTDATE; else if (!strcmp (s,"ARRIVAL")) pg->function = SORTARRIVAL; else if (!strcmp (s,"FROM")) pg->function = SORTFROM; else if (!strcmp (s,"SUBJECT")) pg->function = SORTSUBJECT; else if (!strcmp (s,"TO")) pg->function = SORTTO; else if (!strcmp (s,"CC")) pg->function = SORTCC; else if (!strcmp (s,"SIZE")) pg->function = SORTSIZE; else break; } while (s = strtok (NIL," ")); /* bad SORT attribute */ if (s) response = badatt; else if (!((t = snarf (&arg)) && (cs = cpystr (t)) && arg && *arg)) response = misarg;/* missing search attributes */ else if (!parse_criteria (spg = mail_newsearchpgm (),&arg,nmsgs, nmsgs ? mail_uid (stream,nmsgs) : 0)) response = badatt;/* bad search attribute */ else if (arg && *arg) response = badarg; else if (slst = mail_sort (stream,cs,spg,pgm,uid ? SE_UID : NIL)) { PSOUT ("* SORT"); for (sl = slst; *sl; sl++) { PBOUT (' '); pnum (*sl); } CRLF; fs_give ((void **) &slst); } if (pgm) mail_free_sortpgm (&pgm); if (spg) mail_free_searchpgm (&spg); if (cs) fs_give ((void **) &cs); } } /* thread mailbox */ else if (!strcmp (cmd,"THREAD") || !strcmp (cmd,"UID THREAD")) { THREADNODE *thr; SEARCHPGM *spg; char *cs = NIL; /* must have four arguments */ if (!(arg && (s = strtok (arg," ")) && (cs = strtok (NIL," ")) && (cs = cpystr (cs)) && (arg = strtok (NIL,"\015\012")))) response = misarg; else if (!parse_criteria (spg = mail_newsearchpgm (),&arg,nmsgs, nmsgs ? mail_uid (stream,nmsgs) : 0)) response = badatt;/* bad thread attribute */ else if (arg && *arg) response = badarg; else if (thr = mail_thread (stream,ucase (s),cs,spg, uid ? SE_UID : NIL)) { PSOUT ("* THREAD "); pthread (thr); CRLF; mail_free_threadnode (&thr); } if (spg) mail_free_searchpgm (&spg); if (cs) fs_give ((void **) &cs); } /* search mailbox */ else if (!strcmp (cmd,"SEARCH") || !strcmp (cmd,"UID SEARCH")) { char *charset = NIL; SEARCHPGM *pgm; /* one or more arguments required */ if (!arg) response = misarg; /* character set specified? */ else if ((arg[0] == 'C' || arg[0] == 'c') && (arg[1] == 'H' || arg[1] == 'h') && (arg[2] == 'A' || arg[2] == 'a') && (arg[3] == 'R' || arg[3] == 'r') && (arg[4] == 'S' || arg[4] == 's') && (arg[5] == 'E' || arg[5] == 'e') && (arg[6] == 'T' || arg[6] == 't') && (arg[7] == ' ' || arg[7] == ' ')) { arg += 8; /* yes, skip over CHARSET token */ if (s = snarf (&arg)) charset = cpystr (s); else { /* missing character set */ response = misarg; break; } } /* must have arguments here */ if (!(arg && *arg)) response = misarg; else if (parse_criteria (pgm = mail_newsearchpgm (),&arg,nmsgs, nmsgs ? mail_uid (stream,nmsgs):0)&&!*arg) { mail_search_full (stream,charset,pgm,SE_FREE); if (response == win || response == altwin) { /* output search results */ PSOUT ("* SEARCH"); for (i = 1; i <= nmsgs; ++i) if (mail_elt (stream,i)->searched) { PBOUT (' '); pnum (uid ? mail_uid (stream,i) : i); } CRLF; } } else { response = "%.80s BAD Bogus criteria list in %.80s\015\012"; mail_free_searchpgm (&pgm); } if (charset) fs_give ((void **) &charset); } else /* fall into select case */ case SELECT: /* valid whenever logged in */ /* select new mailbox */ if (!(strcmp (cmd,"SELECT") && strcmp (cmd,"EXAMINE") && strcmp (cmd,"BBOARD"))) { /* single argument */ if (!(s = snarf (&arg))) response = misarg; else if (arg) response = badarg; else if (nameok (NIL,s = bboardname (cmd,s))) { DRIVER *factory = mail_valid (NIL,s,NIL); f = (anonymous ? OP_ANONYMOUS + OP_READONLY : NIL) | ((*cmd == 'S') ? NIL : OP_READONLY); curdriver = NIL; /* no drivers known */ lastuid = -1; /* no last uid */ if (lastid) fs_give ((void **) &lastid); if (lastst.data) fs_give ((void **) &lastst.data); /* force update */ nmsgs = recent = 0xffffffff; if (factory && !strcmp (factory->name,"phile") && (stream = mail_open (stream,s,f | OP_SILENT)) && ((response == win) || (response == altwin))) { BODY *b; /* see if proxy open */ if ((mail_elt (stream,1)->rfc822_size < 400) && mail_fetchstructure (stream,1,&b) && (b->type == TYPETEXT) && (s = mail_fetch_text (stream,1,NIL,&i,NIL)) && (i < MAILTMPLEN) && (s[0] == '{')) { /* copy and tie off */ strncpy (tmp,s,i)[i] = '\0'; /* nuke any trailing newline */ if (s = strpbrk (tmp,"\r\n")) *s = '\0'; /* try to open proxy */ if ((tstream = mail_open (NIL,tmp,f | OP_SILENT)) && ((response == win) || (response == altwin)) && tstream->nmsgs) { /* got it, close the link */ mail_close (stream); stream = tstream; tstream = NIL; } } /* now give the exists event */ stream->silent = NIL; mm_exists (stream,stream->nmsgs); } /* open stream normally then */ else stream = mail_open (stream,s,f); if (stream && ((response == win) || (response == altwin))) { state = OPEN; /* note state open */ /* note readonly/readwrite */ response = stream->rdonly ? "%.80s OK [READ-ONLY] %.80s completed\015\012" : "%.80s OK [READ-WRITE] %.80s completed\015\012"; if (anonymous) syslog (LOG_INFO,"Anonymous select of %.80s host=%.80s", stream->mailbox,tcp_clienthost ()); lastcheck = 0; /* no last check */ } else { /* failed */ state = SELECT; /* no mailbox open now */ response = lose; /* open failed */ } } } /* APPEND message to mailbox */ else if (!(anonymous || strcmp (cmd,"APPEND"))) { u = v = NIL; /* init flags/date */ /* parse mailbox name */ if ((s = snarf (&arg)) && arg) { if (*arg == '(') { /* parse optional flag list */ u = ++arg; /* pointer to flag list contents */ while (*arg && (*arg != ')')) arg++; if (*arg) *arg++ = '\0'; if (*arg == ' ') arg++; } /* parse optional date */ if (*arg == '"') v = snarf (&arg); /* parse message */ if (!arg || (*arg != '{')) response = "%.80s BAD Missing literal in %.80s\015\012"; else if (!isdigit (arg[1])) response = "%.80s BAD Missing message to %.80s\015\012"; else if (!(i = strtoul (arg+1,&t,10))) response = "%.80s No Empty message to %.80s\015\012"; else if ((*t != '}') || t[1]) response = badarg; else { /* append the data */ STRING st; PSOUT (argrdy); /* tell client ready for argument */ PFLUSH; /* dump output buffer */ /* get a literal buffer */ t = (char *) fs_get (i+1); alarm (TIMEOUT); /* get data under timeout */ for (j = 0; j < i; j++) t[j] = inchar (); alarm (0); /* stop timeout */ t[i] = '\0'; /* make sure tied off */ /* get new command tail */ if ((j = inchar ()) == '\015') j = inchar (); if (j == '\012') {/* must be end of command */ INIT (&st,mail_string,(void *) t,i); trycreate = NIL; /* no trycreate status */ if (!mail_append_full (NIL,s,u,v,&st)) { response = trycreate ? losetry : lose; if (!lsterr) lsterr = cpystr ("Unexpected APPEND failure"); } } else { /* junk after literal */ while (inchar () != '\012'); response = badarg; } fs_give ((void **) &t); } } else response = misarg; if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* list mailboxes */ else if (!strcmp (cmd,"LIST") || !strcmp (cmd,"RLIST")) { /* get reference and mailbox argument */ if (!((s = snarf (&arg)) && (t = snarf_list (&arg)))) response = misarg; else if (arg) response = badarg; /* make sure anonymous can't do bad things */ else if (nameok (s,t)) mail_list (NIL,s,t); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* scan mailboxes */ else if (!strcmp (cmd,"SCAN")) { /* get arguments */ if (!((s = snarf (&arg)) && (t = snarf_list (&arg)) && (u = snarf (&arg)))) response = misarg; else if (arg) response = badarg; /* make sure anonymous can't do bad things */ else if (nameok (s,t)) mail_scan (NIL,s,t,u); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* list subscribed mailboxes */ else if (!(anonymous || (strcmp(cmd,"LSUB") && strcmp(cmd,"RLSUB")))) { /* get reference and mailbox argument */ if (!((s = snarf (&arg)) && (t = snarf_list (&arg)))) response = misarg; else if (arg) response = badarg; /* make sure anonymous can't do bad things */ else if (nameok (s,t)) mail_lsub (NIL,s,t); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* find mailboxes */ else if (!strcmp (cmd,"FIND")) { response = "%.80s OK FIND %.80s completed\015\012"; /* get subcommand and true argument */ if (!(arg && (s = strtok (arg," \015\012")) && (cmd = ucase (s)) && (arg = strtok (NIL,"\015\012")) && (s = snarf_list (&arg)))) response = misarg; /* missing required argument */ else if (arg) response = badarg; /* punt on single-char wildcards */ else if (strpbrk (s,"%?")) response = "%.80s NO FIND %.80s ? or %% wildcard not supported\015\012"; else if (nameok (NIL,s)) { finding = T; /* note that we are FINDing */ /* dispatch based on type */ if (!strcmp (cmd,"MAILBOXES") && !anonymous) mail_lsub (NIL,NIL,s); else if (!strcmp (cmd,"ALL.MAILBOXES")) { /* convert * to % for compatible behavior */ for (t = s; *t; t++) if (*t == '*') *t = '%'; mail_list (NIL,NIL,s); } else response="%.80s BAD Command unrecognized: FIND %.80s\015\012"; } if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* status of mailbox */ else if (!strcmp (cmd,"STATUS")) { if (!((s = snarf (&arg)) && arg && (*arg++ == '(') && (t = strchr (arg,')')) && (t - arg) && !t[1])) response = misarg; else { f = NIL; /* initially no flags */ *t = '\0'; /* tie off flag string */ /* read flags */ t = strtok (ucase (arg)," "); do { /* parse each one; unknown generate warning */ if (!strcmp (t,"MESSAGES")) f |= SA_MESSAGES; else if (!strcmp (t,"RECENT")) f |= SA_RECENT; else if (!strcmp (t,"UNSEEN")) f |= SA_UNSEEN; else if (!strcmp (t,"UIDNEXT")) f |= SA_UIDNEXT; else if (!strcmp (t,"UIDVALIDITY")) f |= SA_UIDVALIDITY; else { PSOUT ("* NO Unknown status flag "); PSOUT (t); CRLF; } } while (t = strtok (NIL," ")); ping_mailbox (uid); /* in case the fool did STATUS on open mbx */ /* get mailbox status */ if ((state == LOGOUT) || !mail_status (NIL,s,f)) response = lose; } if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* subscribe to mailbox */ else if (!(anonymous || strcmp (cmd,"SUBSCRIBE"))) { /* get or MAILBOX */ if (!(s = snarf (&arg))) response = misarg; else if (arg) { sprintf (tmp,"%.30s",s); if (strcmp (ucase (tmp),"MAILBOX")) response = badarg; else if (!(s = snarf (&arg))) response = misarg; else if (arg) response = badarg; else mail_subscribe (NIL,s); } else mail_subscribe (NIL,s); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* unsubscribe to mailbox */ else if (!(anonymous || strcmp (cmd,"UNSUBSCRIBE"))) { /* get or MAILBOX */ if (!(s = snarf (&arg))) response = misarg; else if (arg) { sprintf (tmp,"%.30s",s); if (strcmp (ucase (tmp),"MAILBOX")) response = badarg; else if (!(s = snarf (&arg))) response = misarg; else if (arg) response = badarg; else mail_unsubscribe (NIL,s); } else mail_unsubscribe (NIL,s); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } else if (!strcmp (cmd,"NAMESPACE")) { if (arg) response = badarg; else { NAMESPACE **ns = (NAMESPACE **) mail_parameters(NIL,GET_NAMESPACE, NIL); NAMESPACE *n; PARAMETER *p; PSOUT ("* NAMESPACE"); if (ns) for (i = 0; i < 3; i++) { if (n = ns[i]) { PSOUT (" ("); do { PBOUT ('('); pstring (n->name); switch (n->delimiter) { case '\\': /* quoted delimiter */ case '"': PSOUT (" \"\\\\\""); break; case '\0': /* no delimiter */ PSOUT (" NIL"); break; default: /* unquoted delimiter */ PSOUT (" \""); PBOUT (n->delimiter); PBOUT ('"'); break; } if (p = n->param) do { PBOUT (' '); pstring (p->attribute); PBOUT (' '); pstring (p->value); } while (p = p->next); PBOUT (')'); } while (n = n->next); PBOUT (')'); } else PSOUT (" NIL"); } else PSOUT (" NIL NIL NIL"); CRLF; } if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* create mailbox */ else if (!(anonymous || strcmp (cmd,"CREATE"))) { if (!(s = snarf (&arg))) response = misarg; else if (arg) response = badarg; else mail_create (NIL,s); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* delete mailbox */ else if (!(anonymous || strcmp (cmd,"DELETE"))) { if (!(s = snarf (&arg))) response = misarg; else if (arg) response = badarg; else mail_delete (NIL,s); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* rename mailbox */ else if (!(anonymous || strcmp (cmd,"RENAME"))) { if (!((s = snarf (&arg)) && (t = snarf (&arg)))) response = misarg; else if (arg) response = badarg; else mail_rename (NIL,s,t); if (stream) /* allow untagged EXPUNGE */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream); } /* idle mode */ else if (!strcmp (cmd,"IDLE")) { /* no arguments */ if (arg) response = badarg; else { /* tell client ready for argument */ PSOUT (argrdy); PFLUSH; /* dump output buffer */ /* maybe do a checkpoint if not anonymous */ if (!anonymous && stream && (time (0) > lastcheck + CHECKTIMEOUT)){ mail_check (stream); /* cancel likely altwin from mail_check() */ if (response == altwin) response = win; /* remember last checkpoint */ lastcheck = time (0); } do { /* main idle loop */ mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *)stream); ping_mailbox (uid); if (lstwrn) { /* have a warning? */ PSOUT ("* NO "); PSOUT (lstwrn); CRLF; fs_give ((void **) &lstwrn); } PFLUSH; /* dump output buffer */ } while ((state != LOGOUT) && !server_input_wait (IDLETIMEOUT)); if (state != LOGOUT) { slurp (tmp,MAILTMPLEN); if (((tmp[0] != 'D') && (tmp[0] != 'd')) || ((tmp[1] != 'O') && (tmp[1] != 'o')) || ((tmp[2] != 'N') && (tmp[2] != 'n')) || ((tmp[3] != 'E') && (tmp[3] != 'e')) || (((tmp[4] != '\015') || (tmp[5] != '\012')) && (tmp[4] != '\012'))) response = "%.80s BAD Bogus IDLE continuation\015\012"; } } } else response = "%.80s BAD Command unrecognized: %.80s\015\012"; break; default: response = "%.80s BAD Server in unknown state for %.80s command\015\012"; break; } if (lstwrn) { /* output most recent warning */ PSOUT ("* NO "); PSOUT (lstwrn); CRLF; } /* get text for alternative win message now */ if (response == altwin) cmd = lsterr; /* build response */ sprintf (tmp,response,tag,cmd,lasterror ()); ping_mailbox (uid); /* update mailbox status before response */ PSOUT (tmp); /* output response */ } PFLUSH; /* make sure output blatted */ } while (state != LOGOUT); /* until logged out */ syslog (LOG_INFO,"Logout user=%.80s host=%.80s",user ? user : "???", tcp_clienthost ()); return 0; /* all done */ } /* Ping mailbox during each cycle. Also check alerts * Accepts: last command was UID flag */ void ping_mailbox (unsigned long uid) { unsigned long i; char tmp[MAILTMPLEN]; if (state == OPEN) { if (!mail_ping (stream)) { /* make sure stream still alive */ PSOUT ("* BYE "); PSOUT (mylocalhost ()); PSOUT (" Fatal mailbox error: "); PSOUT (lasterror ()); CRLF; state = LOGOUT; /* go away */ syslog (LOG_INFO, "Fatal mailbox error user=%.80s host=%.80s mbx=%.80s: %.80s", user ? user : "???",tcp_clienthost (), (stream && stream->mailbox) ? stream->mailbox : "???", lasterror ()); return; } /* change in number of messages? */ if (existsquelled || (nmsgs != stream->nmsgs)) { PSOUT ("* "); pnum (nmsgs = stream->nmsgs); PSOUT (" EXISTS\015\012"); } /* change in recent messages? */ if (existsquelled || (recent != stream->recent)) { PSOUT ("* "); pnum (recent = stream->recent); PSOUT (" RECENT\015\012"); } existsquelled = NIL; /* don't do this until asked again */ /* don't bother if driver changed */ if (curdriver == stream->dtb) { for (i = 1; i <= nmsgs; i++) if (mail_elt (stream,i)->spare2) { PSOUT ("* "); pnum (i); PSOUT (" FETCH ("); fetch_flags (i,NIL); /* output changed flags */ if (uid) { /* need to include UIDs in response? */ PBOUT (' '); fetch_uid (i,NIL); } PSOUT (")\015\012"); } } else { /* driver changed */ PSOUT ("* OK [UIDVALIDITY "); pnum (stream->uid_validity); PSOUT ("] UID validity status\015\012* OK [UIDNEXT "); pnum (stream->uid_last + 1); PSOUT ("] Predicted next UID\015\012"); if (stream->uid_nosticky) { PSOUT ("* NO [UIDNOTSTICKY] Non-permanent unique identifiers: "); PSOUT (stream->mailbox); CRLF; } new_flags (stream); /* send mailbox flags */ if (curdriver) { /* note readonly/write if possible change */ PSOUT ("* OK [READ-"); PSOUT (stream->rdonly ? "ONLY" : "WRITE"); PSOUT ("] Mailbox status\015\012"); } curdriver = stream->dtb; if (nmsgs) { /* get flags for all messages */ sprintf (tmp,"1:%lu",nmsgs); mail_fetch_flags (stream,tmp,NIL); /* don't do this if newsrc already did */ if (!(curdriver->flags & DR_NEWS)) { /* find first unseen message */ for (i = 1; i <= nmsgs && mail_elt (stream,i)->seen; i++); if (i <= nmsgs) { PSOUT ("* OK [UNSEEN "); pnum (i); PSOUT ("] first unseen message in "); PSOUT (stream->mailbox); CRLF; } } } } } /* don't do these stat()s every cycle */ if (time (0) > alerttime + ALERTTIMEOUT) { /* output any new alerts */ sysalerttime = palert (ALERTFILE,sysalerttime); useralerttime = palert (mailboxfile (tmp,USERALERTFILE),useralerttime); } } /* Print an alert file * Accepts: path of alert file * time of last printed alert file * Returns: updated time of last printed alert file */ time_t palert (char *file,time_t oldtime) { FILE *alf; struct stat sbuf; int c,lc = '\012'; /* have a new alert file? */ if (stat (file,&sbuf) || (sbuf.st_mtime <= oldtime) || !(alf = fopen (file,"r"))) return oldtime; /* yes, display it */ while ((c = getc (alf)) != EOF) { if (lc == '\012') PSOUT ("* OK [ALERT] "); switch (c) { /* output character */ case '\012': /* newline means do CRLF */ CRLF; case '\015': /* flush CRs */ case '\0': /* flush nulls */ break; default: PBOUT (c); /* output all other characters */ break; } lc = c; /* note previous character */ } fclose (alf); if (lc != '\012') CRLF; /* final terminating CRLF */ return sbuf.st_mtime; /* return updated last alert time */ } /* Initialize file string structure for file stringstruct * Accepts: string structure * pointer to message data structure * size of string */ void msg_string_init (STRING *s,void *data,unsigned long size) { MSGDATA *md = (MSGDATA *) data; s->data = data; /* note stream/msgno and header length */ mail_fetchheader_full (md->stream,md->msgno,NIL,&s->data1,FT_PREFETCHTEXT); #if 0 s->size = size; /* message size */ #else /* This kludge is necessary because of broken IMAP servers (sigh!) */ mail_fetchtext_full (md->stream,md->msgno,&s->size,NIL); s->size += s->data1; /* header + body size */ #endif SETPOS (s,0); } /* Get next character from file stringstruct * Accepts: string structure * Returns: character, string structure chunk refreshed */ char msg_string_next (STRING *s) { char c = *s->curpos++; /* get next byte */ SETPOS (s,GETPOS (s)); /* move to next chunk */ return c; /* return the byte */ } /* Set string pointer position for file stringstruct * Accepts: string structure * new position */ void msg_string_setpos (STRING *s,unsigned long i) { MSGDATA *md = (MSGDATA *) s->data; if (i < s->data1) { /* want header? */ s->chunk = mail_fetchheader (md->stream,md->msgno); s->chunksize = s->data1; /* header length */ s->offset = 0; /* offset is start of message */ } else if (i < s->size) { /* want body */ s->chunk = mail_fetchtext (md->stream,md->msgno); s->chunksize = s->size - s->data1; s->offset = s->data1; /* offset is end of header */ } else { /* off end of message */ s->chunk = NIL; /* make sure that we crack on this then */ s->chunksize = 1; /* make sure SNX cracks the right way... */ s->offset = i; } /* initial position and size */ s->curpos = s->chunk + (i -= s->offset); s->cursize = s->chunksize - i; } /* Send flags for stream * Accepts: MAIL stream * scratch buffer */ void new_flags (MAILSTREAM *stream) { int i,c; PSOUT ("* FLAGS ("); for (i = 0; i < NUSERFLAGS; i++) if (stream->user_flags[i]) { PSOUT (stream->user_flags[i]); PBOUT (' '); } PSOUT ("\\Answered \\Flagged \\Deleted \\Draft \\Seen)\015\012* OK [PERMANENTFLAGS ("); for (i = c = 0; i < NUSERFLAGS; i++) if ((stream->perm_user_flags & (1 << i)) && stream->user_flags[i]) put_flag (&c,stream->user_flags[i]); if (stream->kwd_create) put_flag (&c,"\\*"); if (stream->perm_answered) put_flag (&c,"\\Answered"); if (stream->perm_flagged) put_flag (&c,"\\Flagged"); if (stream->perm_deleted) put_flag (&c,"\\Deleted"); if (stream->perm_draft) put_flag (&c,"\\Draft"); if (stream->perm_seen) put_flag (&c,"\\Seen"); PSOUT (")] Permanent flags\015\012"); } /* Clock interrupt */ void clkint (void) { alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); if (!quell_events) PSOUT ("* BYE Autologout; idle for too long\015\012"); syslog (LOG_INFO,"Autologout user=%.80s host=%.80s",user ? user : "???", tcp_clienthost ()); PFLUSH; /* make sure output blatted */ if (critical) state = LOGOUT; /* badly hosed if in critical code */ else { /* try to gracefully close the stream */ if ((state == OPEN) && !stream->lock) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); /* die die die */ } } /* Kiss Of Death interrupt */ void kodint (void) { alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); if (!quell_events) PSOUT ("* BYE Lost mailbox lock\015\012"); PFLUSH; /* make sure output blatted */ syslog (LOG_INFO,"Killed (lost mailbox lock) user=%.80s host=%.80s", user ? user : "???",tcp_clienthost ()); if (critical) state = LOGOUT; /* must defer if in critical code */ else { /* try to gracefully close the stream */ if ((state == OPEN) && !stream->lock) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); /* die die die */ } } /* Hangup interrupt */ void hupint (void) { alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); syslog (LOG_INFO,"Hangup user=%.80s host=%.80s",user ? user : "???", tcp_clienthost ()); if (critical) state = LOGOUT; /* must defer if in critical code */ else { /* try to gracefully close the stream */ if ((state == OPEN) && !stream->lock) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); /* die die die */ } } /* Termination interrupt */ void trmint (void) { alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); if (!quell_events) PSOUT ("* BYE Killed\015\012"); syslog (LOG_INFO,"Killed user=%.80s host=%.80s",user ? user : "???", tcp_clienthost ()); if (critical) state = LOGOUT; /* must defer if in critical code */ else { /* try to gracefully close the stream */ if ((state == OPEN) && !stream->lock) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); /* die die die */ } } /* Slurp a command line * Accepts: buffer pointer * buffer size */ void slurp (char *s,int n) { s[--n] = '\0'; /* last buffer character is guaranteed NUL */ /* get a command under timeout */ alarm ((state != LOGIN) ? TIMEOUT : LOGINTIMEOUT); errno = 0; /* clear error */ while (!PSIN (s,n)) { /* read buffer */ if (errno==EINTR) errno = 0;/* ignore if some interrupt */ else { char *e = errno ? strerror (errno) : "command stream end of file"; alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); syslog (LOG_INFO,"%.80s, while reading line user=%.80s host=%.80s", e,user ? user : "???",tcp_clienthost ()); /* try to gracefully close the stream */ if (state == OPEN) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); } } alarm (0); /* make sure timeout disabled */ } /* Read a character * Returns: character */ char inchar (void) { int c; while ((c = PBIN ()) == EOF) { if (errno==EINTR) errno = 0;/* ignore if some interrupt */ else { char *e = errno ? strerror (errno) : "command stream end of file"; alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); syslog (LOG_INFO,"%.80s, while reading char user=%.80s host=%.80s", e,user ? user : "???",tcp_clienthost ()); /* try to gracefully close the stream */ if (state == OPEN) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); } } return c; } /* Flush until newline seen * Returns: NIL, always */ char *flush (void) { while (inchar () != '\012'); /* slurp until we find newline */ response = "%.80s BAD Command line too long\015\012"; return NIL; } /* Parse an IMAP astring * Accepts: pointer to argument text pointer * pointer to returned size * pointer to returned delimiter * Returns: argument */ char *parse_astring (char **arg,unsigned long *size,char *del) { unsigned long i; char c,*s,*t,*v; if (!*arg) return NIL; /* better be an argument */ switch (**arg) { /* see what the argument is */ default: /* atom */ for (s = t = *arg, i = 0; (*t > ' ') && (*t < 0x7f) && (*t != '(') && (*t != ')') && (*t != '{') && (*t != '%') && (*t != '*') && (*t != '"') && (*t != '\\'); ++t,++i); if (*size = i) break; /* got atom if non-empty */ case ')': case '%': case '*': case '\\': case '\0': case ' ': return NIL; /* empty atom is a bogon */ case '"': /* hunt for trailing quote */ for (s = t = v = *arg + 1; (c = *t++) != '"'; *v++ = c) { if (c == '\\') c = *t++; /* quote next character */ /* else must be a CHAR */ if (!c || (c & 0x80)) return NIL; } *v = '\0'; /* tie off string */ *size = v - s; /* return size */ break; case '{': /* literal string */ s = *arg + 1; /* get size */ if (!isdigit (*s)) return NIL; if ((*size = i = strtoul (s,&t,10)) > MAXCLIENTLIT) { mm_notify (NIL,"Absurdly long client literal",ERROR); syslog (LOG_INFO,"Absurdly long client literal user=%.80s host=%.80s", user ? user : "???",tcp_clienthost ()); return NIL; } /* validate end of literal */ if (!t || (*t != '}') || t[1]) return NIL; if (litsp >= LITSTKLEN) { /* make sure don't overflow stack */ mm_notify (NIL,"Too many literals in command",ERROR); return NIL; } PSOUT (argrdy); /* tell client ready for argument */ PFLUSH; /* dump output buffer */ /* get a literal buffer */ s = v = litstk[litsp++] = (char *) fs_get (i+1); /* get literal under timeout */ alarm ((state != LOGIN) ? TIMEOUT : LOGINTIMEOUT); while (i--) *v++ = inchar (); alarm (0); /* stop timeout */ *v++ = NIL; /* make sure string tied off */ /* get new command tail */ slurp ((*arg = v = t),TMPLEN - (t - cmdbuf)); if (!strchr (t,'\012')) return flush (); /* reset strtok mechanism, tie off if done */ if (!strtok (t,"\015\012")) *t = '\0'; break; } if (*del = *t) { /* have a delimiter? */ *t++ = '\0'; /* yes, stomp on it */ *arg = t; /* update argument pointer */ } else *arg = NIL; /* no more arguments */ return s; } /* Snarf a command argument (simple jacket into parse_astring()) * Accepts: pointer to argument text pointer * Returns: argument */ char *snarf (char **arg) { unsigned long i; char c; char *s = parse_astring (arg,&i,&c); return ((c == ' ') || !c) ? s : NIL; } /* Snarf a list command argument (simple jacket into parse_astring()) * Accepts: pointer to argument text pointer * Returns: argument */ char *snarf_list (char **arg) { unsigned long i; char c; char *s,*t; if (!*arg) return NIL; /* better be an argument */ switch (**arg) { default: /* atom and/or wildcard chars */ for (s = t = *arg, i = 0; (*t > ' ') && (*t != '(') && (*t != ')') && (*t != '{') && (*t != '"') && (*t != '\\'); ++t,++i); if (c = *t) { /* have a delimiter? */ *t++ = '\0'; /* stomp on it */ *arg = t; /* update argument pointer */ } else *arg = NIL; break; case ')': case '\\': case '\0': case ' ': return NIL; /* empty name is bogus */ case '"': /* quoted string? */ case '{': /* or literal? */ s = parse_astring (arg,&i,&c); break; } return ((c == ' ') || !c) ? s : NIL; } /* Get a list of header lines * Accepts: pointer to string pointer * pointer to list flag * Returns: string list */ STRINGLIST *parse_stringlist (char **s,int *list) { char c = ' ',*t; unsigned long i; STRINGLIST *ret = NIL,*cur = NIL; if (*s && **s == '(') { /* proper list? */ ++*s; /* for each item in list */ while ((c == ' ') && (t = parse_astring (s,&i,&c))) { /* get new block */ if (cur) cur = cur->next = mail_newstringlist (); else cur = ret = mail_newstringlist (); /* note text */ cur->text.data = (unsigned char *) fs_get (i + 1); memcpy (cur->text.data,t,i); cur->text.size = i; /* and size */ } /* must be end of list */ if (c != ')') mail_free_stringlist (&ret); } if (t = *s) { /* need to reload strtok() state? */ /* end of a list? */ if (*list && (*t == ')') && !t[1]) *list = NIL; else { *--t = ' '; /* patch a space back in */ *--t = 'x'; /* and a hokey character before that */ t = strtok (t," "); /* reset to *s */ } } return ret; } /* Parse search criteria * Accepts: search program to write criteria into * pointer to argument text pointer * maximum message number * maximum UID * Returns: T if success, NIL if error */ long parse_criteria (SEARCHPGM *pgm,char **arg,unsigned long maxmsg, unsigned long maxuid) { if (arg && *arg) { /* must be an argument */ /* parse criteria */ do if (!parse_criterion (pgm,arg,maxmsg,maxuid)) return NIL; /* as long as a space delimiter */ while (**arg == ' ' && (*arg)++); /* failed if not end of criteria */ if (**arg && **arg != ')') return NIL; } return T; /* success */ } /* Parse a search criterion * Accepts: search program to write criterion into * pointer to argument text pointer * maximum message number * maximum UID * Returns: T if success, NIL if error */ long parse_criterion (SEARCHPGM *pgm,char **arg,unsigned long maxmsg, unsigned long maxuid) { unsigned long i; char c = NIL,*s,*t,*v,*tail,*del; SEARCHSET **set; SEARCHPGMLIST **not; SEARCHOR **or; SEARCHHEADER **hdr; long ret = NIL; if (!(arg && *arg)); /* better be an argument */ else if (**arg == '(') { /* list of criteria? */ (*arg)++; /* yes, parse the criteria */ if (parse_criteria (pgm,arg,maxmsg,maxuid) && **arg == ')') { (*arg)++; /* skip closing paren */ ret = T; /* successful parse of list */ } } else { /* find end of criterion */ if (!(tail = strpbrk ((s = *arg)," )"))) tail = *arg + strlen (*arg); c = *(del = tail); /* remember the delimiter */ *del = '\0'; /* tie off criterion */ switch (*ucase (s)) { /* dispatch based on character */ case '*': /* sequence */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (*(set = &pgm->msgno)){/* already a sequence? */ /* silly, but not as silly as the client! */ for (not = &pgm->not; *not; not = &(*not)->next); *not = mail_newsearchpgmlist (); set = &((*not)->pgm->not = mail_newsearchpgmlist ())->pgm->msgno; } ret = crit_set (set,&s,maxmsg) && (tail == s); break; case 'A': /* possible ALL, ANSWERED */ if (!strcmp (s+1,"LL")) ret = T; else if (!strcmp (s+1,"NSWERED")) ret = pgm->answered = T; break; case 'B': /* possible BCC, BEFORE, BODY */ if (!strcmp (s+1,"CC") && c == ' ' && *++tail) ret = crit_string (&pgm->bcc,&tail); else if (!strcmp (s+1,"EFORE") && c == ' ' && *++tail) ret = crit_date (&pgm->before,&tail); else if (!strcmp (s+1,"ODY") && c == ' ' && *++tail) ret = crit_string (&pgm->body,&tail); break; case 'C': /* possible CC */ if (!strcmp (s+1,"C") && c == ' ' && *++tail) ret = crit_string (&pgm->cc,&tail); break; case 'D': /* possible DELETED */ if (!strcmp (s+1,"ELETED")) ret = pgm->deleted = T; if (!strcmp (s+1,"RAFT")) ret = pgm->draft = T; break; case 'F': /* possible FLAGGED, FROM */ if (!strcmp (s+1,"LAGGED")) ret = pgm->flagged = T; else if (!strcmp (s+1,"ROM") && c == ' ' && *++tail) ret = crit_string (&pgm->from,&tail); break; case 'H': /* possible HEADER */ if (!strcmp (s+1,"EADER") && c == ' ' && *(v = tail + 1) && (s = parse_astring (&v,&i,&c)) && i && c == ' ' && (t = parse_astring (&v,&i,&c))) { for (hdr = &pgm->header; *hdr; hdr = &(*hdr)->next); *hdr = mail_newsearchheader (s,t); /* update tail, restore delimiter */ *(tail = v ? v - 1 : t + i) = c; ret = T; /* success */ } break; case 'K': /* possible KEYWORD */ if (!strcmp (s+1,"EYWORD") && c == ' ' && *++tail) ret = crit_string (&pgm->keyword,&tail); break; case 'L': if (!strcmp (s+1,"ARGER") && c == ' ' && *++tail) ret = crit_number (&pgm->larger,&tail); break; case 'N': /* possible NEW, NOT */ if (!strcmp (s+1,"EW")) ret = pgm->recent = pgm->unseen = T; else if (!strcmp (s+1,"OT") && c == ' ' && *++tail) { for (not = &pgm->not; *not; not = &(*not)->next); *not = mail_newsearchpgmlist (); ret = parse_criterion ((*not)->pgm,&tail,maxmsg,maxuid); } break; case 'O': /* possible OLD, ON */ if (!strcmp (s+1,"LD")) ret = pgm->old = T; else if (!strcmp (s+1,"N") && c == ' ' && *++tail) ret = crit_date (&pgm->on,&tail); else if (!strcmp (s+1,"R") && c == ' ') { for (or = &pgm->or; *or; or = &(*or)->next); *or = mail_newsearchor (); ret = *++tail && parse_criterion ((*or)->first,&tail,maxmsg,maxuid) && *tail == ' ' && *++tail && parse_criterion ((*or)->second,&tail,maxmsg,maxuid); } break; case 'R': /* possible RECENT */ if (!strcmp (s+1,"ECENT")) ret = pgm->recent = T; break; case 'S': /* possible SEEN, SINCE, SUBJECT */ if (!strcmp (s+1,"EEN")) ret = pgm->seen = T; else if (!strcmp (s+1,"ENTBEFORE") && c == ' ' && *++tail) ret = crit_date (&pgm->sentbefore,&tail); else if (!strcmp (s+1,"ENTON") && c == ' ' && *++tail) ret = crit_date (&pgm->senton,&tail); else if (!strcmp (s+1,"ENTSINCE") && c == ' ' && *++tail) ret = crit_date (&pgm->sentsince,&tail); else if (!strcmp (s+1,"INCE") && c == ' ' && *++tail) ret = crit_date (&pgm->since,&tail); else if (!strcmp (s+1,"MALLER") && c == ' ' && *++tail) ret = crit_number (&pgm->smaller,&tail); else if (!strcmp (s+1,"UBJECT") && c == ' ' && *++tail) ret = crit_string (&pgm->subject,&tail); break; case 'T': /* possible TEXT, TO */ if (!strcmp (s+1,"EXT") && c == ' ' && *++tail) ret = crit_string (&pgm->text,&tail); else if (!strcmp (s+1,"O") && c == ' ' && *++tail) ret = crit_string (&pgm->to,&tail); break; case 'U': /* possible UID, UN* */ if (!strcmp (s+1,"ID") && c== ' ' && *++tail) { if (*(set = &pgm->uid)){/* already a sequence? */ /* silly, but not as silly as the client! */ for (not = &pgm->not; *not; not = &(*not)->next); *not = mail_newsearchpgmlist (); set = &((*not)->pgm->not = mail_newsearchpgmlist ())->pgm->uid; } ret = crit_set (set,&tail,maxuid); } else if (!strcmp (s+1,"NANSWERED")) ret = pgm->unanswered = T; else if (!strcmp (s+1,"NDELETED")) ret = pgm->undeleted = T; else if (!strcmp (s+1,"NDRAFT")) ret = pgm->undraft = T; else if (!strcmp (s+1,"NFLAGGED")) ret = pgm->unflagged = T; else if (!strcmp (s+1,"NKEYWORD") && c == ' ' && *++tail) ret = crit_string (&pgm->unkeyword,&tail); else if (!strcmp (s+1,"NSEEN")) ret = pgm->unseen = T; break; default: /* oh dear */ break; } if (ret) { /* only bother if success */ *del = c; /* restore delimiter */ *arg = tail; /* update argument pointer */ } } return ret; /* return more to come */ } /* Parse a search date criterion * Accepts: date to write into * pointer to argument text pointer * Returns: T if success, NIL if error */ long crit_date (unsigned short *date,char **arg) { /* handle quoted form */ if (**arg != '"') return crit_date_work (date,arg); (*arg)++; /* skip past opening quote */ if (!(crit_date_work (date,arg) && (**arg == '"'))) return NIL; (*arg)++; /* skip closing quote */ return T; } /* Worker routine to parse a search date criterion * Accepts: date to write into * pointer to argument text pointer * Returns: T if success, NIL if error */ long crit_date_work (unsigned short *date,char **arg) { int d,m,y; /* day */ if (isdigit (d = *(*arg)++) || ((d == ' ') && isdigit (**arg))) { if (d == ' ') d = 0; /* leading space */ else d -= '0'; /* first digit */ if (isdigit (**arg)) { /* if a second digit */ d *= 10; /* slide over first digit */ d += *(*arg)++ - '0'; /* second digit */ } if ((**arg == '-') && (y = *++(*arg))) { m = (y >= 'a' ? y - 'a' : y - 'A') * 1024; if ((y = *++(*arg))) { m += (y >= 'a' ? y - 'a' : y - 'A') * 32; if ((y = *++(*arg))) { m += (y >= 'a' ? y - 'a' : y - 'A'); switch (m) { /* determine the month */ case (('J'-'A') * 1024) + (('A'-'A') * 32) + ('N'-'A'): m = 1; break; case (('F'-'A') * 1024) + (('E'-'A') * 32) + ('B'-'A'): m = 2; break; case (('M'-'A') * 1024) + (('A'-'A') * 32) + ('R'-'A'): m = 3; break; case (('A'-'A') * 1024) + (('P'-'A') * 32) + ('R'-'A'): m = 4; break; case (('M'-'A') * 1024) + (('A'-'A') * 32) + ('Y'-'A'): m = 5; break; case (('J'-'A') * 1024) + (('U'-'A') * 32) + ('N'-'A'): m = 6; break; case (('J'-'A') * 1024) + (('U'-'A') * 32) + ('L'-'A'): m = 7; break; case (('A'-'A') * 1024) + (('U'-'A') * 32) + ('G'-'A'): m = 8; break; case (('S'-'A') * 1024) + (('E'-'A') * 32) + ('P'-'A'): m = 9; break; case (('O'-'A') * 1024) + (('C'-'A') * 32) + ('T'-'A'): m = 10;break; case (('N'-'A') * 1024) + (('O'-'A') * 32) + ('V'-'A'): m = 11;break; case (('D'-'A') * 1024) + (('E'-'A') * 32) + ('C'-'A'): m = 12;break; default: return NIL; } if ((*++(*arg) == '-') && isdigit (*++(*arg))) { y = 0; /* init year */ do { y *= 10; /* add this number */ y += *(*arg)++ - '0'; } while (isdigit (**arg)); /* minimal validity check of date */ if (d < 1 || d > 31 || m < 1 || m > 12 || y < 0) return NIL; /* Tenex/ARPAnet began in 1969 */ if (y < 100) y += (y >= (BASEYEAR - 1900)) ? 1900 : 2000; /* return value */ *date = ((y - BASEYEAR) << 9) + (m << 5) + d; return T; /* success */ } } } } } return NIL; /* else error */ } /* Parse a search set criterion * Accepts: set to write into * pointer to argument text pointer * maximum value permitted * Returns: T if success, NIL if error */ long crit_set (SEARCHSET **set,char **arg,unsigned long maxima) { unsigned long i; *set = mail_newsearchset (); /* instantiate a new search set */ if (**arg == '*') { /* maxnum? */ (*arg)++; /* skip past that number */ (*set)->first = maxima; } else if (crit_number (&i,arg) && i) (*set)->first = i; else return NIL; /* bogon */ switch (**arg) { /* decide based on delimiter */ case ':': /* sequence range */ if (*++(*arg) == '*') { /* maxnum? */ (*arg)++; /* skip past that number */ (*set)->last -= maxima; } else if (crit_number (&i,arg) && i) { if (i < (*set)->first) { /* backwards range */ (*set)->last = (*set)->first; (*set)->first = i; } else (*set)->last = i; /* set last number */ } else return NIL; /* bogon */ if (**arg != ',') break; /* drop into comma case if comma seen */ case ',': (*arg)++; /* skip past delimiter */ return crit_set (&(*set)->next,arg,maxima); default: break; } return T; /* return success */ } /* Parse a search number criterion * Accepts: number to write into * pointer to argument text pointer * Returns: T if success, NIL if error */ long crit_number (unsigned long *number,char **arg) { if (!isdigit (**arg)) return NIL; *number = 0; while (isdigit (**arg)) { /* found a digit? */ *number *= 10; /* add a decade */ *number += *(*arg)++ - '0'; /* add number */ } return T; } /* Parse a search string criterion * Accepts: date to write into * pointer to argument text pointer * Returns: T if success, NIL if error */ long crit_string (STRINGLIST **string,char **arg) { unsigned long i; char c; char *s = parse_astring (arg,&i,&c); if (!s) return NIL; /* find tail of list */ while (*string) string = &(*string)->next; *string = mail_newstringlist (); (*string)->text.data = (unsigned char *) fs_get (i + 1); memcpy ((*string)->text.data,s,i); (*string)->text.data[i] = '\0'; (*string)->text.size = i; /* if end of arguments, wrap it up here */ if (!*arg) *arg = (char *) (*string)->text.data + i; else (*--(*arg) = c); /* back up pointer, restore delimiter */ return T; } /* Fetch message data * Accepts: string of data items to be fetched (must be writeable) * UID fetch flag */ #define MAXFETCH 100 void fetch (char *t,unsigned long uid) { fetchfn_t f[MAXFETCH +2]; void *fa[MAXFETCH + 2]; int k; memset ((void *) f,NIL,sizeof (f)); memset ((void *) fa,NIL,sizeof (fa)); fetch_work (t,uid,f,fa); /* do the work */ /* clean up arguments */ for (k = 1; f[k]; k++) if (fa[k]) (*f[k]) (0,fa[k]); } /* Fetch message data worker routine * Accepts: string of data items to be fetched (must be writeable) * UID fetch flag * function dispatch vector * function argument vector */ void fetch_work (char *t,unsigned long uid,fetchfn_t f[],void *fa[]) { char *s,*v; unsigned long i; unsigned long k = 0; BODY *b; int list = NIL; int parse_envs = NIL; int parse_bodies = NIL; if (uid) { /* need to fetch UIDs? */ fa[k] = NIL; /* no argument */ f[k++] = fetch_uid; /* push a UID fetch on the stack */ } /* process macros */ if (!strcmp (ucase (t),"ALL")) strcpy (t,"(FLAGS INTERNALDATE RFC822.SIZE ENVELOPE)"); else if (!strcmp (t,"FULL")) strcpy (t,"(FLAGS INTERNALDATE RFC822.SIZE ENVELOPE BODY)"); else if (!strcmp (t,"FAST")) strcpy (t,"(FLAGS INTERNALDATE RFC822.SIZE)"); if (list = (*t == '(')) t++; /* skip open paren */ if (s = strtok (t," ")) do { /* parse attribute list */ if (list && (i = strlen (s)) && (s[i-1] == ')')) { list = NIL; /* done with list */ s[i-1] = '\0'; /* tie off last item */ } fa[k] = NIL; /* default to no argument */ if (!strcmp (s,"UID")) { /* no-op if implicit */ if (!uid) f[k++] = fetch_uid; } else if (!strcmp (s,"FLAGS")) f[k++] = fetch_flags; else if (!strcmp (s,"INTERNALDATE")) f[k++] = fetch_internaldate; else if (!strcmp (s,"RFC822.SIZE")) f[k++] = fetch_rfc822_size; else if (!strcmp (s,"ENVELOPE")) { parse_envs = T; /* we will need to parse envelopes */ f[k++] = fetch_envelope; } else if (!strcmp (s,"BODY")) { parse_envs = parse_bodies = T; f[k++] = fetch_body; } else if (!strcmp (s,"BODYSTRUCTURE")) { parse_envs = parse_bodies = T; f[k++] = fetch_bodystructure; } else if (!strcmp (s,"RFC822") || !strcmp (s,"RFC822.PEEK")) { fa[k] = s[6] ? (void *) FT_PEEK : NIL; f[k++] = fetch_rfc822; } else if (!strcmp (s,"RFC822.HEADER")) f[k++] = fetch_rfc822_header; else if (!strcmp (s,"RFC822.TEXT") || !strcmp (s,"RFC822.TEXT.PEEK")) { fa[k] = s[11] ? (void *) FT_PEEK : NIL; f[k++] = fetch_rfc822_text; } else if (!strcmp (s,"RFC822.HEADER.LINES") && (v = strtok (NIL,"\015\012")) && (fa[k] = (void *) parse_stringlist (&v,&list))) f[k++] = fetch_rfc822_header_lines; else if (!strcmp (s,"RFC822.HEADER.LINES.NOT") && (v = strtok (NIL,"\015\012")) && (fa[k] = (void *) parse_stringlist (&v,&list))) f[k++] = fetch_rfc822_header_lines_not; else if (!strncmp (s,"BODY[",5) || !strncmp (s,"BODY.PEEK[",10)) { TEXTARGS *ta = (TEXTARGS *) memset (fs_get (sizeof (TEXTARGS)),0,sizeof (TEXTARGS)); if (s[4] == '.') { /* wanted peek? */ ta->flags = FT_PEEK; s += 10; /* skip to section specifier */ } else s += 5; /* skip to section specifier */ f[k] = fetch_body_part_contents; if (*(v = s) != ']') { /* non-empty section specifier? */ if (isdigit (*v)) { /* have section specifier? */ /* need envelopes and bodies */ parse_envs = parse_bodies = T; while (isdigit (*v)) /* scan to end of section specifier */ if ((*++v == '.') && isdigit (v[1])) v++; /* any IMAP4rev1 stuff following? */ if ((*v == '.') && isalpha (v[1])) { *v++ = '\0'; /* yes, tie off section specifier */ if (!strncmp (v,"MIME",4)) { v += 4; /* found
.MIME */ f[k] = fetch_body_part_mime; } } else if (*v != ']') { /* better be the end if no IMAP4rev1 stuff */ fs_give ((void **) &ta);/* clean up */ response = "%.80s BAD Syntax error in section specifier\015\012"; return; } } if (*v != ']') { /* IMAP4rev1 stuff here? */ if (!strncmp (v,"HEADER",6)) { *v = '\0'; /* tie off in case top level */ v += 6; /* found [
.]HEADER */ f[k] = fetch_body_part_header; /* partial headers wanted? */ if (!strncmp (v,".FIELDS",7)) { v += 7; /* yes */ if (!strncmp (v,".NOT",4)) { v += 4; /* want to exclude named headers */ ta->flags |= FT_NOT; } if (*v || !(v = strtok (NIL,"\015\012")) || !(ta->lines = parse_stringlist (&v,&list))) { fs_give ((void **) &ta);/* clean up */ response = "%.80s BAD Syntax error in header fields\015\012"; return; } } } else if (!strncmp (v,"TEXT",4)) { *v = '\0'; /* tie off in case top level */ v += 4; /* found [
.]TEXT */ f[k] = fetch_body_part_text; } else { fs_give ((void **) &ta);/* clean up */ response = "%.80s BAD Unknown section text specifier\015\012"; return; } } } /* tie off section */ if (*v == ']') *v++ = '\0'; else { /* bogon */ if (ta->lines) mail_free_stringlist (&ta->lines); fs_give ((void **) &ta);/* clean up */ response = "%.80s BAD Section specifier not terminated\015\012"; return; } if (*v == '<') { /* partial specifier? */ ta->first = strtoul (v+1,&v,10); if ((*v++ != '.') || !(ta->last = strtoul (v,&v,10)) || (*v++ != '>')){ if (ta->lines) mail_free_stringlist (&ta->lines); fs_give ((void **) &ta); response ="%.80s BAD Syntax error in partial text specifier\015\012"; return; } } switch (*v) { /* what's there now? */ case ' ': /* more follows */ *--v = ' '; /* patch a space back in */ *--v = 'x'; /* and a hokey character before that */ strtok (v," "); /* reset strtok mechanism */ break; case '\0': /* none */ break; case ')': /* end of list */ if (list && !v[1]) { /* make sure of that */ list = NIL; strtok (v," "); /* reset strtok mechanism */ break; /* all done */ } /* otherwise it's a bogon, drop in */ default: /* bogon */ if (ta->lines) mail_free_stringlist (&ta->lines); fs_give ((void **) &ta); response = "%.80s BAD Syntax error after section specifier\015\012"; return; } /* make copy of section specifier */ if (s && *s) ta->section = cpystr (s); fa[k++] = (void *) ta; /* set argument */ } else { /* unknown attribute */ response = badatt; return; } } while ((s = strtok (NIL," ")) && (k < MAXFETCH) && list); else { response = misarg; /* missing attribute list */ return; } if (s) { /* too many attributes? */ response = "%.80s BAD Excessively complex FETCH attribute list\015\012"; return; } if (list) { /* too many attributes? */ response = "%.80s BAD Unterminated FETCH attribute list\015\012"; return; } f[k] = NIL; /* tie off attribute list */ /* c-client clobbers sequence, use spare */ for (i = 1; i <= nmsgs; i++) mail_elt (stream,i)->spare = mail_elt (stream,i)->sequence; /* for each requested message */ for (i = 1; i <= nmsgs; i++) if (mail_elt (stream,i)->spare) { /* parse envelope, set body, do warnings */ if (parse_envs) mail_fetchstructure (stream,i,parse_bodies ? &b : NIL); quell_events = T; /* can't do any events now */ PSOUT ("* "); /* leader */ pnum (i); PSOUT (" FETCH ("); (*f[0]) (i,fa[0]); /* do first attribute */ for (k = 1; f[k]; k++) { /* for each subsequent attribute */ PBOUT (' '); /* delimit with space */ (*f[k]) (i,fa[k]); /* do that attribute */ } PSOUT (")\015\012"); /* trailer */ quell_events = NIL; /* events alright now */ } } /* Fetch message body structure (extensible) * Accepts: message number * extra argument */ void fetch_bodystructure (unsigned long i,void *args) { BODY *body; mail_fetchstructure (stream,i,&body); PSOUT ("BODYSTRUCTURE "); pbodystructure (body); /* output body */ } /* Fetch message body structure (non-extensible) * Accepts: message number * extra argument */ void fetch_body (unsigned long i,void *args) { BODY *body; mail_fetchstructure (stream,i,&body); PSOUT ("BODY "); /* output attribute */ pbody (body); /* output body */ } /* Fetch body part MIME header * Accepts: message number * extra argument */ void fetch_body_part_mime (unsigned long i,void *args) { TEXTARGS *ta = (TEXTARGS *) args; if (i) { /* do work? */ SIZEDTEXT st; unsigned long uid = mail_uid (stream,i); char *tmp = (char *) fs_get (100 + strlen (ta->section)); sprintf (tmp,"BODY[%s.MIME]",ta->section); /* try to use remembered text */ if ((uid == lastuid) && !strcmp (tmp,lastid)) st = lastst; else { /* get data */ st.data = (unsigned char *) mail_fetch_mime (stream,i,ta->section,&st.size,ta->flags); if (ta->first || ta->last) remember (uid,tmp,&st); } pbodypartstring (i,tmp,&st,ta); fs_give ((void **) &tmp); } else { /* clean up the arguments */ fs_give ((void **) &ta->section); fs_give ((void **) &args); } } /* Fetch body part contents * Accepts: message number * extra argument */ void fetch_body_part_contents (unsigned long i,void *args) { TEXTARGS *ta = (TEXTARGS *) args; if (i) { /* do work? */ SIZEDTEXT st; char *tmp = (char *) fs_get (100+(ta->section ? strlen (ta->section) : 0)); unsigned long uid = mail_uid (stream,i); sprintf (tmp,"BODY[%s]",ta->section ? ta->section : ""); /* try to use remembered text */ if ((uid == lastuid) && !strcmp (tmp,lastid)) st = lastst; else { /* get data */ st.data = (unsigned char *) mail_fetch_body (stream,i,ta->section,&st.size,ta->flags); if (ta->first || ta->last) remember (uid,tmp,&st); } pbodypartstring (i,tmp,&st,ta); fs_give ((void **) &tmp); } else { /* clean up the arguments */ fs_give ((void **) &ta->section); fs_give ((void **) &args); } } /* Fetch MESSAGE/RFC822 body part header * Accepts: message number * extra argument */ void fetch_body_part_header (unsigned long i,void *args) { TEXTARGS *ta = (TEXTARGS *) args; unsigned long len = 100 + (ta->section ? strlen (ta->section) : 0); STRINGLIST *s; for (s = ta->lines; s; s = s->next) len += s->text.size + 1; if (i) { /* do work? */ SIZEDTEXT st; char *tmp = (char *) fs_get (len); PSOUT ("BODY["); /* output attribute */ if (ta->section && *ta->section) { PSOUT (ta->section); PBOUT ('.'); } PSOUT ("HEADER"); if (ta->lines) { PSOUT ((ta->flags & FT_NOT) ? ".FIELDS.NOT " : ".FIELDS "); pstringlist (ta->lines); } strcpy (tmp,"]"); /* close section specifier */ st.data = (unsigned char *) /* get data (no hope in using remember here) */ mail_fetch_header (stream,i,ta->section,ta->lines,&st.size,ta->flags); pbodypartstring (i,tmp,&st,ta); fs_give ((void **) &tmp); } else { /* clean up the arguments */ if (ta->lines) mail_free_stringlist (&ta->lines); if (ta->section) fs_give ((void **) &ta->section); fs_give ((void **) &args); } } /* Fetch MESSAGE/RFC822 body part text * Accepts: message number * extra argument */ void fetch_body_part_text (unsigned long i,void *args) { TEXTARGS *ta = (TEXTARGS *) args; if (i) { /* do work? */ SIZEDTEXT st; char *tmp = (char *) fs_get (100+(ta->section ? strlen (ta->section) : 0)); unsigned long uid = mail_uid (stream,i); /* output attribute */ if (ta->section && *ta->section) sprintf (tmp,"BODY[%s.TEXT]",ta->section); else strcpy (tmp,"BODY[TEXT]"); /* try to use remembered text */ if ((uid == lastuid) && !strcmp (tmp,lastid)) st = lastst; else { /* get data */ st.data = (unsigned char *) mail_fetch_text (stream,i,ta->section,&st.size,ta->flags); if (ta->first || ta->last) remember (uid,tmp,&st); } pbodypartstring (i,tmp,&st,ta); fs_give ((void **) &tmp); } else { /* clean up the arguments */ if (ta->section) fs_give ((void **) &ta->section); fs_give ((void **) &args); } } /* Remember body part text for subsequent partial fetching * Accepts: message UID * body part id * text */ void remember (unsigned long uid,char *id,SIZEDTEXT *st) { lastuid = uid; /* remember UID */ if (lastid) fs_give ((void **) &lastid); lastid = cpystr (id); /* remember body part id */ if (lastst.data) fs_give ((void **) &lastst.data); /* remember text */ lastst.data = (unsigned char *) cpystr ((char *) st->data); lastst.size = st->size; } /* Fetch envelope * Accepts: message number * extra argument */ void fetch_envelope (unsigned long i,void *args) { ENVELOPE *env = mail_fetchenvelope (stream,i); PSOUT ("ENVELOPE "); /* output attribute */ penv (env); /* output envelope */ } /* Fetch matching header lines * Accepts: message number * extra argument */ void fetch_rfc822_header_lines (unsigned long i,void *args) { STRINGLIST *sa = (STRINGLIST *) args; if (i) { /* do work? */ SIZEDTEXT st; st.data = (unsigned char *) mail_fetch_header (stream,i,NIL,sa,&st.size,FT_PEEK); /* output literal */ pnstring ("RFC822.HEADER",&st); } else mail_free_stringlist (&sa); } /* Fetch not-matching header lines * Accepts: message number * extra argument */ void fetch_rfc822_header_lines_not (unsigned long i,void *args) { STRINGLIST *sa = (STRINGLIST *) args; if (i) { /* do work? */ SIZEDTEXT st; st.data = (unsigned char *) mail_fetch_header (stream,i,NIL,sa,&st.size,FT_NOT | FT_PEEK); /* output literal */ pnstring ("RFC822.HEADER",&st); } else mail_free_stringlist (&sa); } /* Fetch flags * Accepts: message number * extra argument */ void fetch_flags (unsigned long i,void *args) { unsigned long u; char *t,tmp[MAILTMPLEN]; int c = NIL; MESSAGECACHE *elt = mail_elt (stream,i); if (!elt->valid) { /* have valid flags yet? */ sprintf (tmp,"%lu",i); mail_fetch_flags (stream,tmp,NIL); } PSOUT ("FLAGS ("); /* output attribute */ /* output system flags */ if (elt->recent) put_flag (&c,"\\Recent"); if (elt->seen) put_flag (&c,"\\Seen"); if (elt->deleted) put_flag (&c,"\\Deleted"); if (elt->flagged) put_flag (&c,"\\Flagged"); if (elt->answered) put_flag (&c,"\\Answered"); if (elt->draft) put_flag (&c,"\\Draft"); if (u = elt->user_flags) do /* any user flags? */ if (t = stream->user_flags[find_rightmost_bit (&u)]) put_flag (&c,t); while (u); /* until no more user flags */ PBOUT (')'); /* end of flags */ elt->spare2 = NIL; /* we've sent the update */ } /* Output a flag * Accepts: pointer to current delimiter character * flag to output * Changes delimiter character to space */ void put_flag (int *c,char *s) { if (*c) PBOUT (*c); /* put delimiter */ PSOUT (s); /* dump flag */ *c = ' '; /* change delimiter if necessary */ } /* Output flags if was unseen * Accepts: message number * prior value of Seen flag */ void changed_flags (unsigned long i,int f) { /* was unseen, now seen? */ if (!f && mail_elt (stream,i)->seen) { PBOUT (' '); /* yes, delimit with space */ fetch_flags (i,NIL); /* output flags */ } } /* Fetch message internal date * Accepts: message number * extra argument */ void fetch_internaldate (unsigned long i,void *args) { char tmp[MAILTMPLEN]; MESSAGECACHE *elt = mail_elt (stream,i); if (!elt->day) { /* have internal date yet? */ sprintf (tmp,"%lu",i); mail_fetch_fast (stream,tmp,NIL); } PSOUT ("INTERNALDATE \""); PSOUT (mail_date (tmp,elt)); PBOUT ('"'); } /* Fetch unique identifier * Accepts: message number * extra argument */ void fetch_uid (unsigned long i,void *args) { PSOUT ("UID "); pnum (mail_uid (stream,i)); } /* Fetch complete RFC-822 format message * Accepts: message number * extra argument */ void fetch_rfc822 (unsigned long i,void *args) { if (i) { /* do work? */ int f = mail_elt (stream,i)->seen; #if 0 SIZEDTEXT st; st.data = (unsigned char *) mail_fetch_message (stream,i,&st.size,(long) args); pnstring ("RFC822",st); #else /* Yes, this version is bletcherous, but mail_fetch_message() requires too much memory */ SIZEDTEXT txt,hdr; char *s = mail_fetch_header (stream,i,NIL,NIL,&hdr.size,FT_PEEK); hdr.data = (unsigned char *) memcpy (fs_get (hdr.size),s,hdr.size); txt.data = (unsigned char *) mail_fetch_text (stream,i,NIL,&txt.size,(long) args); PSOUT ("RFC822 {"); pnum (hdr.size + txt.size); PSOUT ("}\015\012"); ptext (&hdr); ptext (&txt); fs_give ((void **) &hdr.data); #endif changed_flags (i,f); /* output changed flags */ } } /* Fetch RFC-822 header * Accepts: message number * extra argument */ void fetch_rfc822_header (unsigned long i,void *args) { SIZEDTEXT st; st.data = (unsigned char *) mail_fetch_header (stream,i,NIL,NIL,&st.size,FT_PEEK); pnstring ("RFC822.HEADER",&st); } /* Fetch RFC-822 message length * Accepts: message number * extra argument */ void fetch_rfc822_size (unsigned long i,void *args) { char tmp[MAILTMPLEN]; MESSAGECACHE *elt = mail_elt (stream,i); if (!elt->rfc822_size) { /* have message size yet? */ sprintf (tmp,"%lu",i); mail_fetch_fast (stream,tmp,NIL); } PSOUT ("RFC822.SIZE "); pnum (elt->rfc822_size); } /* Fetch RFC-822 text only * Accepts: message number * extra argument */ void fetch_rfc822_text (unsigned long i,void *args) { if (i) { /* do work? */ int f = mail_elt (stream,i)->seen; SIZEDTEXT st; st.data = (unsigned char *) mail_fetch_text (stream,i,NIL,&st.size,(long) args); pnstring ("RFC822.TEXT",&st); changed_flags (i,f); /* output changed flags */ } } /* Print envelope * Accepts: body */ void penv (ENVELOPE *env) { PBOUT ('('); /* delimiter */ if (env) { /* only if there is an envelope */ pstring (env->date); /* output envelope fields */ PBOUT (' '); pstring (env->subject); PBOUT (' '); paddr (env->from); PBOUT (' '); paddr (env->sender); PBOUT (' '); paddr (env->reply_to); PBOUT (' '); paddr (env->to); PBOUT (' '); paddr (env->cc); PBOUT (' '); paddr (env->bcc); PBOUT (' '); pstring (env->in_reply_to); PBOUT (' '); pstring (env->message_id); } /* no envelope */ else PSOUT ("NIL NIL NIL NIL NIL NIL NIL NIL NIL NIL"); PBOUT (')'); /* end of envelope */ } /* Print body structure (extensible) * Accepts: body */ void pbodystructure (BODY *body) { PBOUT ('('); /* delimiter */ if (body) { /* only if there is a body */ PART *part; /* multipart type? */ if (body->type == TYPEMULTIPART) { /* print each part */ if (part = body->nested.part) for (; part; part = part->next) pbodystructure (&(part->body)); else pbodystructure (NIL); PBOUT (' '); /* space delimiter */ pstring (body->subtype); /* subtype */ PBOUT (' '); pparam (body->parameter); /* multipart body extension data */ PBOUT (' '); if (body->disposition.type) { PBOUT ('('); pstring (body->disposition.type); PBOUT (' '); pparam (body->disposition.parameter); PBOUT (')'); } else PSOUT ("NIL"); PBOUT (' '); pstringorlist (body->language); } else { /* non-multipart body type */ pstring ((char *) body_types[body->type]); PBOUT (' '); pstring (body->subtype); PBOUT (' '); pparam (body->parameter); PBOUT (' '); pstring (body->id); PBOUT (' '); pstring (body->description); PBOUT (' '); pstring ((char *) body_encodings[body->encoding]); PBOUT (' '); pnum (body->size.bytes); switch (body->type) { /* extra stuff depends upon body type */ case TYPEMESSAGE: /* can't do this if not RFC822 */ if (strcmp (body->subtype,"RFC822")) break; PBOUT (' '); penv (body->nested.msg->env); PBOUT (' '); pbodystructure (body->nested.msg->body); case TYPETEXT: PBOUT (' '); pnum (body->size.lines); break; default: break; } PBOUT (' '); pstring (body->md5); PBOUT (' '); if (body->disposition.type) { PBOUT ('('); pstring (body->disposition.type); PBOUT (' '); pparam (body->disposition.parameter); PBOUT (')'); } else PSOUT ("NIL"); PBOUT (' '); pstringorlist (body->language); } } /* no body */ else PSOUT ("\"TEXT\" \"PLAIN\" (\"CHARSET\" \"US-ASCII\") NIL NIL \"7BIT\" 0 0 NIL NIL NIL"); PBOUT (')'); /* end of body */ } /* Print body (non-extensible) * Accepts: body */ void pbody (BODY *body) { PBOUT ('('); /* delimiter */ if (body) { /* only if there is a body */ PART *part; /* multipart type? */ if (body->type == TYPEMULTIPART) { /* print each part */ if (part = body->nested.part) for (; part; part = part->next) pbody (&(part->body)); else pbody (NIL); PBOUT (' '); /* space delimiter */ pstring (body->subtype); /* and finally the subtype */ } else { /* non-multipart body type */ pstring ((char *) body_types[body->type]); PBOUT (' '); pstring (body->subtype); PBOUT (' '); pparam (body->parameter); PBOUT (' '); pstring (body->id); PBOUT (' '); pstring (body->description); PBOUT (' '); pstring ((char *) body_encodings[body->encoding]); PBOUT (' '); pnum (body->size.bytes); switch (body->type) { /* extra stuff depends upon body type */ case TYPEMESSAGE: /* can't do this if not RFC822 */ if (strcmp (body->subtype,"RFC822")) break; PBOUT (' '); penv (body->nested.msg->env); PBOUT (' '); pbody (body->nested.msg->body); case TYPETEXT: PBOUT (' '); pnum (body->size.lines); break; default: break; } } } /* no body */ else PSOUT ("\"TEXT\" \"PLAIN\" (\"CHARSET\" \"US-ASCII\") NIL NIL \"7BIT\" 0 0"); PBOUT (')'); /* end of body */ } /* Print parameter list * Accepts: paramter */ void pparam (PARAMETER *param) { if (param) { /* one specified? */ PBOUT ('('); do { pstring (param->attribute); PBOUT (' '); pstring (param->value); if (param = param->next) PBOUT (' '); } while (param); PBOUT (')'); /* end of parameters */ } else PSOUT ("NIL"); } /* Print address list * Accepts: address list */ void paddr (ADDRESS *a) { if (a) { /* have anything in address? */ PBOUT ('('); /* open the address list */ do { /* for each address */ PBOUT ('('); /* open the address */ pstring (a->personal); /* personal name */ PBOUT (' '); pstring (a->adl); /* at-domain-list */ PBOUT (' '); pstring (a->mailbox); /* mailbox */ PBOUT (' '); pstring (a->host); /* domain name of mailbox's host */ PBOUT (')'); /* terminate address */ } while (a = a->next); /* until end of address */ PBOUT (')'); /* close address list */ } else PSOUT ("NIL"); /* empty address */ } /* Print number * Accepts: number */ void pnum (unsigned long i) { char tmp[MAILTMPLEN]; sprintf (tmp,"%lu",i); PSOUT (tmp); } /* Print null-terminated string * Accepts: string */ void pstring (char *s) { SIZEDTEXT st; st.data = (unsigned char *) s;/* set up sized text */ st.size = s ? strlen (s) : 0; /* NIL text is zero size */ pnstring (NIL,&st); /* print nstring */ } /* Print NIL or string * Accepts: label to be output before nstring * pointer to sized text or NIL */ void pnstring (char *label,SIZEDTEXT *st) { if (label) { PSOUT (label); PBOUT (' '); } if (st && st->data) psizedtext (st); else PSOUT ("NIL"); } /* Print atom or string * Accepts: astring */ void pastring (char *s) { char *t; if (!*s) PSOUT ("\"\""); /* empty string */ else { /* see if atom */ for (t = s; (*t > ' ') && !(*t & 0x80) && (*t != '"') && (*t != '\\') && (*t != '(') && (*t != ')') && (*t != '{') && (*t != '%') && (*t != '*'); t++); if (*t) pstring (s); /* not an atom */ else PSOUT (s); /* else plop down as atomic */ } } /* Print body part string * Accepts: message number * body part id (note: must have space at end to append stuff) * sized text of string * text printing arguments */ void pbodypartstring (unsigned long msgno,char *id,SIZEDTEXT *st,TEXTARGS *ta) { int f = mail_elt (stream,msgno)->seen; if (st->data) { /* only if have useful data */ /* partial specifier */ if (ta->first || ta->last) sprintf (id + strlen (id),"<%lu>",ta->first); /* in case first byte beyond end of text */ if (st->size <= ta->first) st->size = ta->first = 0; else { /* offset and truncate */ st->data += ta->first; /* move to desired position */ st->size -= ta->first; /* reduced size */ if (ta->last && (st->size > ta->last)) st->size = ta->last; } } pnstring (id,st); /* output nstring */ changed_flags (msgno,f); /* and changed flags */ } /* Print string or string listlist * Accepts: string / string list list */ void pstringorlist (STRINGLIST *s) { if (!s) PSOUT ("NIL"); /* no argument given */ /* output list as list */ else if (s->next) pstringlist (s); else psizedtext (&s->text); /* and single-element list as atom */ } /* Print string list * Accepts: string list */ void pstringlist (STRINGLIST *s) { PBOUT ('('); /* start list */ do { psizedtext (&s->text); /* output list member */ if (s->next) PBOUT (' '); } while (s = s->next); PBOUT (')'); /* terminate list */ } /* Print sized text as literal or quoted string * Accepts: sized text */ void psizedtext (SIZEDTEXT *s) { unsigned long i; for (i = 0; i < s->size; i++) /* check if must use literal */ if (!(s->data[i] & 0xe0) || (s->data[i] & 0x80) || (s->data[i] == '"') || (s->data[i] == '\\')) { PBOUT ('{'); pnum (s->size); PSOUT ("}\015\012"); ptext (s); return; } PBOUT ('"'); /* use quoted string */ ptext (s); PBOUT ('"'); } /* Print text * Accepts: pointer to text * pointer to size of text */ void ptext (SIZEDTEXT *txt) { unsigned long i; for (i = 0; ((i < txt->size) && ((PBOUT (txt->data[i])) != EOF)); i++); if (i < txt->size) { /* failed to complete? */ alarm (0); /* disable all interrupts */ server_init (NIL,NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN); syslog (LOG_INFO,"%.80s, while writing text user=%.80s host=%.80s", strerror (errno),user ? user : "???",tcp_clienthost ()); if (state == OPEN) mail_close (stream); state = LOGOUT; stream = NIL; _exit (1); } } /* Print thread * Accepts: thread */ void pthread (THREADNODE *thr) { THREADNODE *t; while (thr) { /* for each branch */ PBOUT ('('); /* open branch */ pnum (thr->num); /* first first node message number */ for (t = thr->next; t;) { /* any subsequent nodes? */ PBOUT (' '); /* yes, delimit */ if (t->branch) { /* branches? */ pthread (t); /* yes, recurse to do branch */ t = NIL; /* done */ } else { /* just output this number */ pnum (t->num); t = t->next; /* and do next message */ } } PBOUT (')'); /* done with this branch */ thr = thr->branch; /* do next branch */ } } /* Anonymous users may only use these mailboxes in these namespaces */ char *oktab[] = {"#news.", "#ftp/", "#public/", 0}; /* Check if mailbox name is OK * Accepts: reference name * mailbox name */ long nameok (char *ref,char *name) { int i; char *s,*t; if (!name) return NIL; /* failure if missing name */ if (!anonymous) return T; /* otherwise OK if not anonymous */ /* validate reference */ if (ref && ((*ref == '#') || (*ref == '{'))) for (i = 0; oktab[i]; i++) { for (s = ref, t = oktab[i]; *t && (*s + (isupper (*s) ? 'a'-'A' : 0)) == *t; *s++, *t++); if (!*t) { /* reference OK */ if (*name == '#') break;/* check name if override */ else return T; /* otherwise done */ } } /* ordinary names are OK */ if ((*name != '#') && (*name != '{')) return T; for (i = 0; oktab[i]; i++) { /* validate mailbox */ for (s = name, t = oktab[i]; *t && (*s + (isupper (*s) ? 'a'-'A' : 0)) == *t; *s++, *t++); if (!*t) return T; /* name is OK */ } response = "%.80s NO Anonymous may not %.80s this name\015\012"; return NIL; } /* Convert possible BBoard name to actual name * Accepts: command * mailbox name * Returns: maibox name */ char *bboardname (char *cmd,char *name) { if (cmd[0] == 'B') { /* want bboard? */ char *s = litstk[litsp++] = (char *) fs_get (strlen (name) + 9); sprintf (s,"#public/%s",(*name == '/') ? name+1 : name); name = s; } return name; } /* IMAP4rev1 Authentication responder * Accepts: challenge * length of challenge * pointer to response length return location if non-NIL * Returns: response */ #define RESPBUFLEN 8*MAILTMPLEN char *imap_responder (void *challenge,unsigned long clen,unsigned long *rlen) { unsigned long i,j; unsigned char *t,resp[RESPBUFLEN]; PSOUT ("+ "); for (t = rfc822_binary ((void *) challenge,clen,&i),j = 0; j < i; j++) if (t[j] > ' ') PBOUT (t[j]); fs_give ((void **) &t); CRLF; PFLUSH; /* dump output buffer */ /* slurp response buffer */ slurp ((char *) resp,RESPBUFLEN); if (!(t = (unsigned char *) strchr ((char *) resp,'\012'))) return flush (); if (t[-1] == '\015') --t; /* remove CR */ *t = '\0'; /* tie off buffer */ return (resp[0] != '*') ? (char *) rfc822_base64 (resp,t-resp,rlen ? rlen : &i) : NIL; } /* Proxy copy across mailbox formats * Accepts: mail stream * sequence to copy on this stream * destination mailbox * option flags * Returns: T if success, else NIL */ long proxycopy (MAILSTREAM *stream,char *sequence,char *mailbox,long options) { MAILSTREAM *ts; MESSAGECACHE *elt; STRING st; MSGDATA md; unsigned long i,j; char *s,*t,tmp[MAILTMPLEN],date[MAILTMPLEN]; md.stream = stream; if (!((options & CP_UID) ? /* validate sequence */ mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence))) return NIL; response = win; /* cancel previous errors */ if (lsterr) fs_give ((void **) &lsterr); /* c-client clobbers sequence, use spare */ for (i = 1; i <= nmsgs; i++) mail_elt (stream,i)->spare = mail_elt (stream,i)->sequence; for (j = 0,md.msgno = 1; md.msgno <= nmsgs; j++,md.msgno++) if ((elt = mail_elt (stream,md.msgno))->spare) { if (!(elt->valid && elt->day)) { sprintf (tmp,"%lu",md.msgno); mail_fetch_fast (stream,tmp,NIL); } memset (s = tmp,0,MAILTMPLEN); /* copy flags */ if (elt->seen) strcat (s," \\Seen"); if (elt->deleted) strcat (s," \\Deleted"); if (elt->flagged) strcat (s," \\Flagged"); if (elt->answered) strcat (s," \\Answered"); if (elt->draft) strcat (s," \\Draft"); if (i = elt->user_flags) do if ((t = stream->user_flags[find_rightmost_bit (&i)]) && *t && (strlen (t) < ((size_t) (MAILTMPLEN-((s += strlen (s))+2-tmp))))) { *s++ = ' '; /* space delimiter */ strcpy (s,t); } while (i); /* until no more user flags */ INIT (&st,msg_string,(void *) &md,elt->rfc822_size); if (!mail_append_full (NIL,mailbox,tmp+1,mail_date (date,elt),&st)) { s = lsterr ? lsterr : "Unexpected APPEND failure"; if (j) { sprintf (tmp,"%.80s after %lu messages",s,j); mm_log (tmp,ERROR); } else mm_log (s,ERROR); return NIL; } } response = win; /* stomp any previous babble */ /* get new driver name if was dummy */ sprintf (tmp,"Cross-format (%.80s -> %.80s) COPY completed", stream->dtb->name,(ts = mail_open (NIL,mailbox,OP_PROTOTYPE)) ? ts->dtb->name : "unknown"); mm_log (tmp,NIL); return T; } /* Co-routines from MAIL library */ /* Message matches a search * Accepts: MAIL stream * message number */ void mm_searched (MAILSTREAM *s,unsigned long msgno) { /* nothing to do here */ } /* Message exists (i.e. there are that many messages in the mailbox) * Accepts: MAIL stream * message number */ void mm_exists (MAILSTREAM *s,unsigned long number) { /* note change in number of messages */ if ((s != tstream) && (nmsgs != number)) { nmsgs = number; /* always update number of messages */ if (quell_events) existsquelled = T; else { PSOUT ("* "); pnum (nmsgs); PSOUT (" EXISTS\015\012"); } recent = 0xffffffff; /* make sure update recent too */ } } /* Message expunged * Accepts: MAIL stream * message number */ void mm_expunged (MAILSTREAM *s,unsigned long number) { if (quell_events) fatal ("Impossible EXPUNGE event"); if (s != tstream) { PSOUT ("* "); pnum (number); PSOUT (" EXPUNGE\015\012"); } nmsgs--; existsquelled = T; /* do EXISTS when command done */ } /* Message status changed * Accepts: MAIL stream * message number */ void mm_flags (MAILSTREAM *s,unsigned long number) { if (s != tstream) mail_elt (s,number)->spare2 = T; } /* Mailbox found * Accepts: hierarchy delimiter * mailbox name * attributes */ void mm_list (MAILSTREAM *stream,int delimiter,char *name,long attributes) { mm_list_work ("LIST",delimiter,name,attributes); } /* Subscribed mailbox found * Accepts: hierarchy delimiter * mailbox name * attributes */ void mm_lsub (MAILSTREAM *stream,int delimiter,char *name,long attributes) { mm_list_work ("LSUB",delimiter,name,attributes); } /* Mailbox status * Accepts: MAIL stream * mailbox name * mailbox status */ void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status) { if (!quell_events) { char tmp[MAILTMPLEN]; tmp[0] = tmp[1] = '\0'; if (status->flags & SA_MESSAGES) sprintf (tmp + strlen (tmp)," MESSAGES %lu",status->messages); if (status->flags & SA_RECENT) sprintf (tmp + strlen (tmp)," RECENT %lu",status->recent); if (status->flags & SA_UNSEEN) sprintf (tmp + strlen (tmp)," UNSEEN %lu",status->unseen); if (status->flags & SA_UIDNEXT) sprintf (tmp + strlen (tmp)," UIDNEXT %lu",status->uidnext); if (status->flags & SA_UIDVALIDITY) sprintf (tmp + strlen(tmp)," UIDVALIDITY %lu",status->uidvalidity); PSOUT ("* STATUS "); pastring (mailbox); PSOUT (" ("); PSOUT (tmp+1); PBOUT (')'); CRLF; } } /* Worker routine for LIST and LSUB * Accepts: name of response * hierarchy delimiter * mailbox name * attributes */ void mm_list_work (char *what,int delimiter,char *name,long attributes) { if (!quell_events) { char tmp[MAILTMPLEN]; if (finding) { PSOUT ("* MAILBOX "); PSOUT (name); } /* new form */ else if ((cmd[0] == 'R') || !(attributes & LATT_REFERRAL)) { PSOUT ("* "); PSOUT (what); PSOUT (" ("); tmp[0] = tmp[1] = '\0'; if (attributes & LATT_NOINFERIORS) strcat (tmp," \\NoInferiors"); if (attributes & LATT_NOSELECT) strcat (tmp," \\NoSelect"); if (attributes & LATT_MARKED) strcat (tmp," \\Marked"); if (attributes & LATT_UNMARKED) strcat (tmp," \\UnMarked"); PSOUT (tmp+1); switch (delimiter) { case '\\': /* quoted delimiter */ case '"': PSOUT (") \"\\"); PBOUT (delimiter); PBOUT ('"'); break; case '\0': /* no delimiter */ PSOUT (") NIL"); break; default: /* unquoted delimiter */ PSOUT (") \""); PBOUT (delimiter); PBOUT ('"'); break; } PBOUT (' '); pastring (name); /* output mailbox name */ } CRLF; } } /* Notification event * Accepts: MAIL stream * string to log * error flag */ void mm_notify (MAILSTREAM *s,char *string,long errflg) { char *code; if (!quell_events && (!tstream || (s != tstream))) { switch (errflg) { case NIL: /* information message, set as OK response */ if ((string[0] == '[') && ((string[1] == 'T') || (string[1] == 't')) && ((string[2] == 'R') || (string[2] == 'r')) && ((string[3] == 'Y') || (string[3] == 'y')) && ((string[4] == 'C') || (string[4] == 'c')) && ((string[5] == 'R') || (string[5] == 'r')) && ((string[6] == 'E') || (string[6] == 'e')) && ((string[7] == 'A') || (string[7] == 'a')) && ((string[8] == 'T') || (string[8] == 't')) && ((string[9] == 'E') || (string[9] == 'e')) && (string[10] == ']')) trycreate = T; case BYE: /* some other server signing off */ case PARSE: /* parse glitch, output unsolicited OK */ code = "* OK "; break; case WARN: /* warning, output unsolicited NO (kludge!) */ code = "* NO "; break; case ERROR: /* error that broke command */ default: /* default should never happen */ code = "* BAD "; break; } PSOUT (code); PSOUT (string); CRLF; } } /* Log an event for the user to see * Accepts: string to log * error flag */ void mm_log (char *string,long errflg) { if (!quell_events) switch (errflg) { case NIL: /* information message, set as OK response */ if (response == win) { /* only if no other response yet */ response = altwin; /* switch to alternative win message */ if (lsterr) fs_give ((void **) &lsterr); lsterr = cpystr (string); /* copy string for later use */ } break; case PARSE: /* parse glitch, output unsolicited OK */ PSOUT ("* OK [PARSE] "); PSOUT (string); CRLF; break; case WARN: /* warning, output unsolicited NO */ /* ignore "Mailbox is empty" (KLUDGE!) */ if (strcmp (string,"Mailbox is empty")) { if (lstwrn) { /* have previous warning? */ PSOUT ("* NO "); PSOUT (lstwrn); CRLF; fs_give ((void **) &lstwrn); } lstwrn = cpystr (string); /* note last warning */ } break; case ERROR: /* error that broke command */ default: /* default should never happen */ response = lose; /* set fatality */ if (lsterr) fs_give ((void **) &lsterr); lsterr = cpystr (string); /* note last error */ break; } } /* Return last error */ char *lasterror (void) { if (lsterr) return lsterr; if (lstwrn) return lstwrn; return ""; } /* Log an event to debugging telemetry * Accepts: string to log */ void mm_dlog (char *string) { mm_log (string,WARN); /* shouldn't happen normally */ } /* Get user name and password for this host * Accepts: parse of network user name * where to return user name * where to return password * trial count */ void mm_login (NETMBX *mb,char *username,char *password,long trial) { /* set user name */ strncpy (username,*mb->user ? mb->user : user,NETMAXUSER); strncpy (password,pass,256); /* and password */ } /* About to enter critical code * Accepts: stream */ void mm_critical (MAILSTREAM *s) { critical = T; } /* About to exit critical code * Accepts: stream */ void mm_nocritical (MAILSTREAM *s) { critical = NIL; } /* Disk error found * Accepts: stream * system error code * flag indicating that mailbox may be clobbered * Returns: abort flag */ long mm_diskerror (MAILSTREAM *s,long errcode,long serious) { if (serious) { /* try your damnest if clobberage likely */ mm_notify (s,"Retrying to fix probable mailbox damage!",ERROR); PFLUSH; /* dump output buffer */ syslog (LOG_ALERT, "Retrying after disk error user=%.80s host=%.80s mbx=%.80s: %.80s", user ? user : "???",tcp_clienthost (), (stream && stream->mailbox) ? stream->mailbox : "???", strerror (errcode)); alarm (0); /* make damn sure timeout disabled */ sleep (60); /* give it some time to clear up */ return NIL; } if (!quell_events) { /* otherwise die before more damage is done */ PSOUT ("* BYE Aborting due to disk error: "); PSOUT (strerror (errcode)); CRLF; } syslog (LOG_ALERT,"Fatal disk error user=%.80s host=%.80s mbx=%.80s: %.80s", user ? user : "???",tcp_clienthost (), (stream && stream->mailbox) ? stream->mailbox : "???", strerror (errcode)); return T; } /* Log a fatal error event * Accepts: string to log */ void mm_fatal (char *string) { if (!quell_events) { PSOUT ("* BYE [ALERT] IMAP4rev1 server crashing: "); PSOUT (string); CRLF; } syslog (LOG_ALERT,"Fatal error user=%.80s host=%.80s mbx=%.80s: %.80s", user ? user : "???",tcp_clienthost (), (stream && stream->mailbox) ? stream->mailbox : "???",string); }