Artifact 58d5014510a6d8997b4e803fb61115d7549f205595db5cb62aa2d9d680cc0928:
- File
src/smtp.c
— part of check-in
[51740ce4]
at
2018-08-14 03:55:56
on branch trunk
— The blob-to-SMTP encoding logic was not strictly following RFC 5321 in that it was only dealing with the lone dot on the line case, doubling it to prevent the SMTP server from interpreting that as end-of-message. It missed the case where, if anything follows the dot, SMTP drops the leading dot, so you must also double the leading dot in that case. Basically, you always double a leading dot, regardless of line length.
This only affects Fossil's direct-to-SMTP email sending case, not those that send via a piped command or via DB. That is dealt with later in [8c0ec30bc3]. (user: wyoung size: 47366)
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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581/* ** Copyright (c) 2018 D. Richard Hipp ** ** This program is free software; you can redistribute it and/or ** modify it under the terms of the Simplified BSD License (also ** known as the "2-Clause License" or "FreeBSD License".) ** ** This program is distributed in the hope that it will be useful, ** but without any warranty; without even the implied warranty of ** merchantability or fitness for a particular purpose. ** ** Author contact information: ** drh@hwaci.com ** http://www.hwaci.com/drh/ ** ******************************************************************************* ** ** Implementation of SMTP (Simple Mail Transport Protocol) according ** to RFC 5321. */ #include "config.h" #include "smtp.h" #include <assert.h> #if defined(__linux__) && !defined(FOSSIL_OMIT_DNS) # include <sys/types.h> # include <netinet/in.h> # include <arpa/nameser.h> # include <resolv.h> # define FOSSIL_UNIX_STYLE_DNS 1 #endif #if defined(_WIN32) && !defined(__MINGW32__) && !defined(__MINGW64__) # include <windows.h> # include <windns.h> # define FOSSIL_WINDOWS_STYLE_DNS 1 #endif /* ** Find the hostname for receiving email for the domain given ** in zDomain. Return NULL if not found or not implemented. ** If multiple email receivers are advertized, pick the one with ** the lowest preference number. ** ** The returned string is obtained from fossil_malloc() ** and should be released using fossil_free(). */ char *smtp_mx_host(const char *zDomain){ #if defined(FOSSIL_UNIX_STYLE_DNS) int nDns; /* Length of the DNS reply */ int rc; /* Return code from various APIs */ int i; /* Loop counter */ int iBestPriority = 9999999; /* Best priority */ int nRec; /* Number of answers */ ns_msg h; /* DNS reply parser */ const unsigned char *pBest = 0; /* RDATA for the best answer */ unsigned char aDns[5000]; /* Raw DNS reply content */ char zHostname[5000]; /* Hostname for the MX */ nDns = res_query(zDomain, C_IN, T_MX, aDns, sizeof(aDns)); if( nDns<=0 ) return 0; res_init(); rc = ns_initparse(aDns,nDns,&h); if( rc ) return 0; nRec = ns_msg_count(h, ns_s_an); for(i=0; i<nRec; i++){ ns_rr x; int priority, sz; const unsigned char *p; rc = ns_parserr(&h, ns_s_an, i, &x); if( rc ) continue; p = ns_rr_rdata(x); sz = ns_rr_rdlen(x); if( sz>2 ){ priority = p[0]*256 + p[1]; if( priority<iBestPriority ){ pBest = p; iBestPriority = priority; } } } if( pBest ){ ns_name_uncompress(aDns, aDns+nDns, pBest+2, zHostname, sizeof(zHostname)); return fossil_strdup(zHostname); } return 0; #elif defined(FOSSIL_WINDOWS_STYLE_DNS) DNS_STATUS status; /* Return status */ PDNS_RECORDA pDnsRecord, p; /* Pointer to DNS_RECORD structure */ int iBestPriority = 9999999; /* Best priority */ char *pBest = 0; /* RDATA for the best answer */ status = DnsQuery_UTF8(zDomain, /* Domain name */ DNS_TYPE_MX, /* DNS record type */ DNS_QUERY_STANDARD, /* Query options */ NULL, /* List of DNS servers */ &pDnsRecord, /* Query results */ NULL); /* Reserved */ if( status ) return NULL; p = pDnsRecord; while( p ){ if( p->Data.MX.wPreference<iBestPriority ){ iBestPriority = p->Data.MX.wPreference; pBest = p->Data.MX.pNameExchange; } p = p->pNext; } if( pBest ){ pBest = fossil_strdup(pBest); } DnsRecordListFree(pDnsRecord, DnsFreeRecordListDeep); return pBest; #else return 0; #endif /* defined(FOSSIL_WINDOWS_STYLE_DNS) */ } /* ** COMMAND: test-find-mx ** ** Usage: %fossil test-find-mx DOMAIN ... ** ** Do a DNS MX lookup to find the hostname for sending email for ** DOMAIN. */ void test_find_mx(void){ int i; if( g.argc<=2 ){ usage("DOMAIN ..."); } for(i=2; i<g.argc; i++){ char *z = smtp_mx_host(g.argv[i]); fossil_print("%s: %s\n", g.argv[i], z); fossil_free(z); } } #if INTERFACE /* ** Information about a single SMTP connection. */ struct SmtpSession { const char *zFrom; /* Domain from which we are sending */ const char *zDest; /* Domain that will receive the email */ char *zHostname; /* Hostname of SMTP server for zDest */ u32 smtpFlags; /* Flags changing the operation */ FILE *logFile; /* Write session transcript to this log file */ Blob *pTranscript; /* Record session transcript here */ int atEof; /* True after connection closes */ char *zErr; /* Error message */ Blob inbuf; /* Input buffer */ }; /* Allowed values for SmtpSession.smtpFlags */ #define SMTP_TRACE_STDOUT 0x00001 /* Debugging info to console */ #define SMTP_TRACE_FILE 0x00002 /* Debugging info to logFile */ #define SMTP_TRACE_BLOB 0x00004 /* Record transcript */ #define SMTP_DIRECT 0x00008 /* Skip the MX lookup */ #define SMTP_PORT 0x00010 /* Use an alternate port number */ #endif /* ** Shutdown an SmtpSession */ void smtp_session_free(SmtpSession *pSession){ socket_close(); blob_reset(&pSession->inbuf); fossil_free(pSession->zHostname); fossil_free(pSession->zErr); fossil_free(pSession); } /* ** Allocate a new SmtpSession object. ** ** Both zFrom and zDest must be specified. ** ** The ... arguments are in this order: ** ** SMTP_PORT: int ** SMTP_TRACE_FILE: FILE* ** SMTP_TRACE_BLOB: Blob* */ SmtpSession *smtp_session_new( const char *zFrom, /* Domain for the client */ const char *zDest, /* Domain of the server */ u32 smtpFlags, /* Flags */ ... /* Arguments depending on the flags */ ){ SmtpSession *p; va_list ap; UrlData url; p = fossil_malloc( sizeof(*p) ); memset(p, 0, sizeof(*p)); p->zFrom = zFrom; p->zDest = zDest; p->smtpFlags = smtpFlags; memset(&url, 0, sizeof(url)); url.port = 25; blob_init(&p->inbuf, 0, 0); va_start(ap, smtpFlags); if( smtpFlags & SMTP_PORT ){ url.port = va_arg(ap, int); } if( smtpFlags & SMTP_TRACE_FILE ){ p->logFile = va_arg(ap, FILE*); } if( smtpFlags & SMTP_TRACE_BLOB ){ p->pTranscript = va_arg(ap, Blob*); } va_end(ap); if( (smtpFlags & SMTP_DIRECT)!=0 ){ int i; p->zHostname = fossil_strdup(zDest); for(i=0; p->zHostname[i] && p->zHostname[i]!=':'; i++){} if( p->zHostname[i]==':' ){ p->zHostname[i] = 0; url.port = atoi(&p->zHostname[i+1]); } }else{ p->zHostname = smtp_mx_host(zDest); } if( p->zHostname==0 ){ p->atEof = 1; p->zErr = mprintf("cannot locate SMTP server for \"%s\"", zDest); return p; } url.name = p->zHostname; socket_global_init(); if( socket_open(&url) ){ p->atEof = 1; p->zErr = socket_errmsg(); socket_close(); } return p; } /* ** Send a single line of output the SMTP client to the server. */ static void smtp_send_line(SmtpSession *p, const char *zFormat, ...){ Blob b = empty_blob; va_list ap; char *z; int n; if( p->atEof ) return; va_start(ap, zFormat); blob_vappendf(&b, zFormat, ap); va_end(ap); z = blob_buffer(&b); n = blob_size(&b); assert( n>=2 ); assert( z[n-1]=='\n' ); assert( z[n-2]=='\r' ); if( p->smtpFlags & SMTP_TRACE_STDOUT ){ fossil_print("C: %.*s\n", n-2, z); } if( p->smtpFlags & SMTP_TRACE_FILE ){ fprintf(p->logFile, "C: %.*s\n", n-2, z); } if( p->smtpFlags & SMTP_TRACE_BLOB ){ blob_appendf(p->pTranscript, "C: %.*s\n", n-2, z); } socket_send(0, z, n); blob_reset(&b); } /* ** Read a line of input received from the SMTP server. Make in point ** to the next input line. ** ** Content is actually read into the p->in buffer. Then blob_line() ** is used to extract individual lines, passing each to "in". */ static void smtp_recv_line(SmtpSession *p, Blob *in){ int n = blob_size(&p->inbuf); char *z = blob_buffer(&p->inbuf); int i = blob_tell(&p->inbuf); int nDelay = 0; if( i<n && z[n-1]=='\n' ){ blob_line(&p->inbuf, in); }else if( p->atEof ){ blob_init(in, 0, 0); }else{ if( n>0 && i>=n ){ blob_truncate(&p->inbuf, 0); blob_rewind(&p->inbuf); n = 0; } do{ size_t got; blob_resize(&p->inbuf, n+1000); z = blob_buffer(&p->inbuf); got = socket_receive(0, z+n, 1000, 1); if( got>0 ){ in->nUsed += got; n += got; z[n] = 0; if( n>0 && z[n-1]=='\n' ) break; if( got==1000 ) continue; } nDelay++; if( nDelay>100 ){ blob_init(in, 0, 0); p->zErr = mprintf("timeout"); socket_close(); p->atEof = 1; return; }else{ sqlite3_sleep(100); } }while( n<1 || z[n-1]!='\n' ); blob_truncate(&p->inbuf, n); blob_line(&p->inbuf, in); } z = blob_buffer(in); n = blob_size(in); if( n && z[n-1]=='\n' ) n--; if( n && z[n-1]=='\r' ) n--; if( p->smtpFlags & SMTP_TRACE_STDOUT ){ fossil_print("S: %.*s\n", n, z); } if( p->smtpFlags & SMTP_TRACE_FILE ){ fprintf(p->logFile, "S: %.*s\n", n, z); } if( p->smtpFlags & SMTP_TRACE_BLOB ){ blob_appendf(p->pTranscript, "S: %.*s\n", n-2, z); } } /* ** Capture a single-line server reply. */ static void smtp_get_reply_from_server( SmtpSession *p, /* The SMTP connection */ Blob *in, /* Buffer used to hold the reply */ int *piCode, /* The return code */ int *pbMore, /* True if the reply is not complete */ char **pzArg /* Argument */ ){ int n; char *z; blob_truncate(in, 0); smtp_recv_line(p, in); z = blob_str(in); n = blob_size(in); if( z[0]=='#' ){ *piCode = 0; *pbMore = 1; *pzArg = z; }else{ *piCode = atoi(z); *pbMore = n>=4 && z[3]=='-'; *pzArg = n>=4 ? z+4 : ""; } } /* ** Have the client send a QUIT message. */ int smtp_client_quit(SmtpSession *p){ Blob in = BLOB_INITIALIZER; int iCode = 0; int bMore = 0; char *zArg = 0; smtp_send_line(p, "QUIT\r\n"); do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); p->atEof = 1; socket_close(); return 0; } /* ** Begin a client SMTP session. Wait for the initial 220 then send ** the EHLO and wait for a 250. ** ** Return 0 on success and non-zero for a failure. */ int smtp_client_startup(SmtpSession *p){ Blob in = BLOB_INITIALIZER; int iCode = 0; int bMore = 0; char *zArg = 0; do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); if( iCode!=220 ){ smtp_client_quit(p); return 1; } smtp_send_line(p, "EHLO %s\r\n", p->zFrom); do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); if( iCode!=250 ){ smtp_client_quit(p); return 1; } return 0; } /* ** COMMAND: test-smtp-probe ** ** Usage: %fossil test-smtp-probe DOMAIN [ME] ** ** Interact with the SMTP server for DOMAIN by setting up a connection ** and then immediately shutting it back down. Log all interaction ** on the console. Use ME as the domain name of the sender. ** ** Options: ** ** --direct Use DOMAIN directly without going through MX ** --port N Talk on TCP port N */ void test_smtp_probe(void){ SmtpSession *p; const char *zDomain; const char *zSelf; const char *zPort; int iPort = 25; u32 smtpFlags = SMTP_TRACE_STDOUT|SMTP_PORT; if( find_option("direct",0,0)!=0 ) smtpFlags |= SMTP_DIRECT; zPort = find_option("port",0,1); if( zPort ) iPort = atoi(zPort); verify_all_options(); if( g.argc!=3 && g.argc!=4 ) usage("DOMAIN [ME]"); zDomain = g.argv[2]; zSelf = g.argc==4 ? g.argv[3] : "fossil-scm.org"; p = smtp_session_new(zSelf, zDomain, smtpFlags, iPort); if( p->zErr ){ fossil_fatal("%s", p->zErr); } fossil_print("Connection to \"%s\"\n", p->zHostname); smtp_client_startup(p); smtp_client_quit(p); if( p->zErr ){ fossil_fatal("ERROR: %s\n", p->zErr); } smtp_session_free(p); } /* ** Send the content of an email message followed by a single ** "." line. All lines must be \r\n terminated. Any isolated ** \n line terminators in the input must be converted. Also, ** a line beginning with "." must have the dot doubled per ** https://tools.ietf.org/html/rfc5321#section-4.5.2 */ static void smtp_send_email_body( const char *zMsg, /* Message to send */ size_t (*xSend)(void*,const void*,size_t), /* Sender callback function */ void *pArg /* First arg to sender */ ){ Blob in; Blob out = BLOB_INITIALIZER; Blob line; blob_init(&in, zMsg, -1); while( blob_line(&in, &line) ){ char *z = blob_buffer(&line); int n = blob_size(&line); if( n==0 ) break; n--; if( n && z[n-1]=='\r' ) n--; if( z[0]=='.' ){ blob_append(&out, "..", 2); /* RFC 5321 ยง 4.5.2 */ blob_append(&out, z+1, n-1); }else{ blob_append(&out, z, n); } blob_append(&out, "\r\n", 2); } blob_append(&out, ".\r\n", 3); xSend(pArg, blob_buffer(&out), blob_size(&out)); blob_reset(&out); blob_reset(&line); } /* A sender function appropriate for use by smtp_send_email_body() to ** send all content to the console, for testing. */ static size_t smtp_test_sender(void *NotUsed, const void *pContent, size_t N){ return fwrite(pContent, 1, N, stdout); } /* ** COMMAND: test-smtp-senddata ** ** Usage: %fossil test-smtp-senddata FILE ** ** Read content from FILE, then send it to stdout encoded as if sent ** to the DATA portion of an SMTP session. This command is used to ** test the encoding logic. */ void test_smtp_senddata(void){ Blob f; if( g.argc!=3 ) usage("FILE"); blob_read_from_file(&f, g.argv[2], ExtFILE); smtp_send_email_body(blob_str(&f), smtp_test_sender, 0); blob_reset(&f); } /* ** Send a single email message to the SMTP server. ** ** All email addresses (zFrom and azTo) must be plain "local@domain" ** format without the surrounding "<..>". This routine will add the ** necessary "<..>". ** ** The body of the email should be well-structured. This routine will ** convert any \n line endings into \r\n and will escape lines containing ** just ".", but will not make any other alterations or corrections to ** the message content. ** ** Return 0 on success. Otherwise an error code. */ int smtp_send_msg( SmtpSession *p, /* The SMTP server to which the message is sent */ const char *zFrom, /* Who the message is from */ int nTo, /* Number of receipients */ const char **azTo, /* Email address of each recipient */ const char *zMsg /* Body of the message */ ){ int i; int iCode = 0; int bMore = 0; char *zArg = 0; Blob in; blob_init(&in, 0, 0); smtp_send_line(p, "MAIL FROM:<%s>\r\n", zFrom); do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); if( iCode!=250 ) return 1; for(i=0; i<nTo; i++){ smtp_send_line(p, "RCPT TO:<%s>\r\n", azTo[i]); do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); if( iCode!=250 ) return 1; } smtp_send_line(p, "DATA\r\n"); do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); if( iCode!=354 ) return 1; smtp_send_email_body(zMsg, socket_send, 0); if( p->smtpFlags & SMTP_TRACE_STDOUT ){ fossil_print("C: # message content\nC: .\n"); } if( p->smtpFlags & SMTP_TRACE_FILE ){ fprintf(p->logFile, "C: # message content\nC: .\n"); } if( p->smtpFlags & SMTP_TRACE_BLOB ){ blob_appendf(p->pTranscript, "C: # message content\nC: .\n"); } do{ smtp_get_reply_from_server(p, &in, &iCode, &bMore, &zArg); }while( bMore ); if( iCode!=250 ) return 1; return 0; } /* ** The input is a base email address of the form "local@domain". ** Return a pointer to just the "domain" part. */ static const char *domainOfAddr(const char *z){ while( z[0] && z[0]!='@' ) z++; if( z[0]==0 ) return 0; return z+1; } /* ** COMMAND: test-smtp-send ** ** Usage: %fossil test-smtp-send EMAIL FROM TO ... ** ** Use SMTP to send the email message contained in the file named EMAIL ** to the list of users TO. FROM is the sender of the email. ** ** Options: ** ** --direct Go directly to the TO domain. Bypass MX lookup ** --port N Use TCP port N instead of 25 ** --trace Show the SMTP conversation on the console */ void test_smtp_send(void){ SmtpSession *p; const char *zFrom; int nTo; const char *zToDomain; const char *zFromDomain; const char **azTo; int smtpPort = 25; const char *zPort; Blob body; u32 smtpFlags = SMTP_PORT; if( find_option("trace",0,0)!=0 ) smtpFlags |= SMTP_TRACE_STDOUT; if( find_option("direct",0,0)!=0 ) smtpFlags |= SMTP_DIRECT; zPort = find_option("port",0,1); if( zPort ) smtpPort = atoi(zPort); verify_all_options(); if( g.argc<5 ) usage("EMAIL FROM TO ..."); blob_read_from_file(&body, g.argv[2], ExtFILE); zFrom = g.argv[3]; nTo = g.argc-4; azTo = (const char**)g.argv+4; zFromDomain = domainOfAddr(zFrom); zToDomain = domainOfAddr(azTo[0]); p = smtp_session_new(zFromDomain, zToDomain, smtpFlags, smtpPort); if( p->zErr ){ fossil_fatal("%s", p->zErr); } fossil_print("Connection to \"%s\"\n", p->zHostname); smtp_client_startup(p); smtp_send_msg(p, zFrom, nTo, azTo, blob_str(&body)); smtp_client_quit(p); if( p->zErr ){ fossil_fatal("ERROR: %s\n", p->zErr); } smtp_session_free(p); blob_reset(&body); } /***************************************************************************** ** Server implementation *****************************************************************************/ /* ** Schema used by the email processing system. */ static const char zEmailSchema[] = @ -- bulk storage is in a separate table. This table can store either @ -- the body of email messages or transcripts of smtp sessions. @ CREATE TABLE IF NOT EXISTS repository.emailblob( @ emailid INTEGER PRIMARY KEY AUTOINCREMENT, -- numeric idea for the entry @ enref INT, -- Number of references to this blob @ ets INT, -- Corresponding transcript, or NULL @ etime INT, -- insertion time, secs since 1970 @ esz INT, -- uncompressed content size @ etxt TEXT -- content of this entry @ ); @ @ -- One row for each mailbox entry. All users emails are stored in @ -- this same table. @ CREATE TABLE IF NOT EXISTS repository.emailbox( @ ebid INTEGER PRIMARY KEY, -- Unique id for each mailbox entry @ euser TEXT, -- User who received this email @ edate INT, -- Date received. Seconds since 1970 @ efrom TEXT, -- Who is the email from @ emsgid INT, -- Raw email text @ estate INT, -- 0: Unread, 1: read, 2: trash 3: sent @ esubject TEXT, -- Subject line for display @ etags TEXT -- zero or more tags @ ); @ @ -- Information on how to deliver incoming email. @ CREATE TABLE IF NOT EXISTS repository.emailroute( @ eaddr TEXT PRIMARY KEY, -- Email address @ epolicy TEXT -- How to handle email sent to this address @ ) WITHOUT ROWID; @ @ -- Outgoing email queue @ CREATE TABLE IF NOT EXISTS repository.emailoutq( @ edomain TEXT, -- Destination domain. (ex: "fossil-scm.org") @ efrom TEXT, -- Sender email address @ eto TEXT, -- Recipient email address @ emsgid INT, -- Message body in the emailblob table @ ectime INT, -- Time enqueued. Seconds since 1970 @ emtime INT, -- Time of last send attempt. Sec since 1970 @ ensend INT, -- Number of send attempts @ ets INT -- Transcript of last failed attempt @ ); @ @ -- Triggers to automatically keep the emailblob.enref field up to date @ -- as entries in the emailblob, emailbox, and emailoutq tables are @ -- deleted. @ CREATE TRIGGER IF NOT EXISTS repository.emailblob_d1 @ AFTER DELETE ON emailblob BEGIN @ UPDATE emailblob SET enref=enref-1 WHERE emailid=old.ets; @ END; @ CREATE TRIGGER IF NOT EXISTS repository.emailbox_d1 @ AFTER DELETE ON emailbox BEGIN @ UPDATE emailblob SET enref=enref-1 WHERE emailid=old.emsgid; @ END; @ CREATE TRIGGER IF NOT EXISTS repository.emailoutq_d1 @ AFTER DELETE ON emailoutq BEGIN @ UPDATE emailblob SET enref=enref-1 WHERE emailid IN (old.ets,old.emsgid); @ END; @ @ -- An index on the emailblob entries which are unreferenced. @ CREATE INDEX IF NOT EXISTS repository.emailblob_nref ON emailblob(enref) @ WHERE enref<=0; ; /* ** Code used to delete the email tables. */ static const char zEmailDrop[] = @ DROP TABLE IF EXISTS emailblob; @ DROP TABLE IF EXISTS emailbox; @ DROP TABLE IF EXISTS emailroute; @ DROP TABLE IF EXISTS emailqueue; ; #if INTERFACE /* ** Mailbox message states */ #define MSG_UNREAD 0 #define MSG_READ 1 #define MSG_TRASH 2 #endif /* INTERFACE */ /* ** Populate the schema of a database. ** ** eForce==0 Fast ** eForce==1 Run CREATE TABLE statements every time ** eForce==2 DROP then rerun CREATE TABLE */ void smtp_server_schema(int eForce){ if( eForce==2 ){ db_multi_exec(zEmailDrop/*works-like:""*/); } if( eForce==1 || !db_table_exists("repository","emailblob") ){ db_multi_exec(zEmailSchema/*works-like:""*/); } } /* ** Process POST change requests from the setup_smtp page */ static void handle_smtp_setup_edit(char **pzErr, int *piErr){ *piErr = 0; *pzErr = 0; if( !cgi_csrf_safe(1) ) return; if( P("new")!=0 ){ const char *zEAddr = PDT("eaddr",""); const char *zEPolicy = PDT("epolicy",""); smtp_server_schema(0); if( db_exists("SELECT 1 FROM emailroute WHERE eaddr=%Q", zEAddr) ){ *pzErr = mprintf("\"%s\" already exists", zEAddr); *piErr = 100; return; } db_multi_exec("INSERT INTO emailroute(eaddr,epolicy)" "VALUES(%Q,%Q)", zEAddr, zEPolicy); return; } if( P("delete")!=0 ){ const char *zEAddr = PDT("eaddr",""); const char *zEPolicy = PDT("epolicy",""); smtp_server_schema(0); if( zEPolicy[0] ){ *pzErr = mprintf("Erase routing information to delete"); *piErr = 200; return; } db_multi_exec("DELETE FROM emailroute WHERE eaddr=%Q", zEAddr); return; } if( P("change")!=0 ){ const char *zEAddr = PDT("eaddr",""); const char *zEPolicy = PDT("epolicy",""); smtp_server_schema(0); db_multi_exec("UPDATE emailroute SET epolicy=%Q WHERE eaddr=%Q", zEPolicy, zEAddr); return; } } /* ** WEBPAGE: setup_smtp ** ** Administrative page for configuring and controlling inbound email and ** output email queuing. This page is available to administrators ** only via the /Admin/EmailServer menu. */ void setup_smtp(void){ Stmt q; char *zErr = 0; int iErr = 0; login_check_credentials(); if( !g.perm.Setup ){ login_needed(0); return; } db_begin_transaction(); style_header("Email Server Setup"); handle_smtp_setup_edit(&zErr, &iErr); if( db_table_exists("repository","emailroute") ){ db_prepare(&q, "SELECT eaddr, epolicy FROM emailroute ORDER BY 1"); }else{ db_prepare(&q, "SELECT null, null WHERE false"); } @ <table class="emailroutetab"> @ <thead> @ <tr><th>Email Address @ <th>Routing @ <th></th> @ </thead><tbody> while( db_step(&q)==SQLITE_ROW ){ const char *zEAddr = db_column_text(&q, 0); const char *zEPolicy = db_column_text(&q, 1); @ <tr><form action="%R/setup_smtp" method="POST"> @ <td valign="top">%h(zEAddr)\ @ <input type="hidden" name="eaddr" value="%h(zEAddr)"></td> @ <td valign="top">\ @ <textarea name="epolicy" rows="3" cols="40">%h(zEPolicy)</textarea>\ @ </td> @ <td valign="top">\ @ <input type="submit" name="change" value="Apply Changes"><br>\ @ <input type="submit" name="delete" value="Delete"></td> @ </form></tr> } db_finalize(&q); @ <tr><form action="%R/setup_smtp" method="POST"> @ <td valign="top"> @ <input type="text" name="eaddr" width="30"></td> @ <td valign="top">\ @ <textarea name="epolicy" rows="3" cols="40"></textarea>\ @ </td> @ <td valign="top"><input type="submit" name="new" value="New"></td> @ </form></tr> style_footer(); fossil_free(zErr); db_end_transaction(0); } #if LOCAL_INTERFACE /* ** State information for the server */ struct SmtpServer { sqlite3_int64 idTranscript; /* Transcript ID number */ sqlite3_int64 idMsg; /* Message ID number */ const char *zIpAddr; /* Remote IP address */ char *zEhlo; /* Client domain on the EHLO line */ char *zFrom; /* MAIL FROM: argument */ int nTo; /* Number of RCPT TO: lines seen */ struct SmtpTo { char *z; /* Address in each RCPT TO line */ int okRemote; /* zTo can be in another domain */ } *aTo; u32 srvrFlags; /* Control flags */ int nEts; /* Number of references to the transcript */ int nRef; /* Number of references to idMsg */ Blob msg; /* Content following DATA */ Blob transcript; /* Session transcript */ }; #define SMTPSRV_CLEAR_MSG 1 /* smtp_server_clear() last message only */ #define SMTPSRV_CLEAR_ALL 2 /* smtp_server_clear() everything */ #define SMTPSRV_LOG 0x001 /* Record a transcript of the interaction */ #define SMTPSRV_STDERR 0x002 /* Transcription written to stderr */ #define SMTPSRV_DRYRUN 0x004 /* Do not record anything in database */ #endif /* LOCAL_INTERFACE */ /* ** Clear the SmtpServer object. Deallocate resources. ** How much to clear depends on eHowMuch */ static void smtp_server_clear(SmtpServer *p, int eHowMuch){ int i; if( eHowMuch>=SMTPSRV_CLEAR_MSG ){ fossil_free(p->zFrom); p->zFrom = 0; for(i=0; i<p->nTo; i++) fossil_free(p->aTo[i].z); fossil_free(p->aTo); p->aTo = 0; p->nTo = 0; blob_reset(&p->msg); p->idMsg = 0; } if( eHowMuch>=SMTPSRV_CLEAR_ALL ){ blob_reset(&p->transcript); p->idTranscript = 0; fossil_free(p->zEhlo); p->zEhlo = 0; } } /* ** Turn raw memory into an SmtpServer object. */ static void smtp_server_init(SmtpServer *p){ memset(p, 0, sizeof(*p)); blob_init(&p->msg, 0, 0); blob_init(&p->transcript, 0, 0); } /* ** Append a new TO entry to the SmtpServer object. Do not do the ** append if the same entry is already on the list. ** ** The zAddr argument is obtained from fossil_malloc(). This ** routine assumes ownership of the allocation. */ static void smtp_append_to(SmtpServer *p, char *zAddr, int okRemote){ int i; for(i=0; zAddr[i]; i++){ zAddr[i] = fossil_tolower(zAddr[i]); } for(i=0; i<p->nTo; i++){ if( strcmp(zAddr, p->aTo[i].z)==0 ){ fossil_free(zAddr); if( p->aTo[i].okRemote==0 ) p->aTo[i].okRemote = okRemote; return; } } p->aTo = fossil_realloc(p->aTo, (p->nTo+1)*sizeof(p->aTo[0])); p->aTo[p->nTo].z = zAddr; p->aTo[p->nTo].okRemote = okRemote; p->nTo++; } /* ** Send a single line of output from the server to the client. */ static void smtp_server_send(SmtpServer *p, const char *zFormat, ...){ Blob b = empty_blob; va_list ap; char *z; int n; va_start(ap, zFormat); blob_vappendf(&b, zFormat, ap); va_end(ap); z = blob_buffer(&b); n = blob_size(&b); assert( n>=2 ); assert( z[n-1]=='\n' ); assert( z[n-2]=='\r' ); if( p->srvrFlags & SMTPSRV_LOG ){ blob_appendf(&p->transcript, "S: %.*s\n", n-2, z); } if( p->srvrFlags & SMTPSRV_STDERR ){ fprintf(stderr, "S: %.*s\n", n-2, z); } fwrite(z, n, 1, stdout); fflush(stdout); blob_reset(&b); } /* ** Read a single line from the client. */ static int smtp_server_gets(SmtpServer *p, char *aBuf, int nBuf){ int rc = fgets(aBuf, nBuf, stdin)!=0; if( rc ){ if( (p->srvrFlags & SMTPSRV_LOG)!=0 ){ blob_appendf(&p->transcript, "C: %s", aBuf); } if( (p->srvrFlags & SMTPSRV_STDERR)!=0 ){ fprintf(stderr, "C: %s", aBuf); } } return rc; } /* ** RFC-5321 requires certain content be prepended to an email header ** as that email is received. */ static void smtp_server_prepend_header_lines(SmtpServer *p){ blob_appendf(&p->msg, "Received: from %s by Fossil-smtp\r\n", p->zIpAddr); } /* ** Capture the incoming email data into the p->msg blob. Dequote ** lines of "..\r\n" into just ".\r\n". */ static void smtp_server_capture_data(SmtpServer *p, char *z, int n){ int nLine = 0; while( fgets(z, n, stdin) ){ if( strncmp(z, ".\r\n", 3)==0 || strncmp(z, ".\n",2)==0 ) break; nLine++; if( strncmp(z, "..\r\n", 4)==0 || strncmp(z, "..\n",3)==0 ){ memmove(z, z+1, 4); } blob_append(&p->msg, z, -1); } if( p->srvrFlags & SMTPSRV_LOG ){ blob_appendf(&p->transcript, "C: # %d lines, %d bytes of content\n", nLine, blob_size(&p->msg)); } if( p->srvrFlags & SMTPSRV_STDERR ){ fprintf(stderr, "C: # %d lines, %d bytes of content\n", nLine, blob_size(&p->msg)); } } /* ** Send an email to a single email addess that is registered with ** this system, according to the instructions in emailroute. If ** zAddr is not in the emailroute table, then this routine is a ** no-op. Or if zAddr has already been processed, then this ** routine is a no-op. */ static void smtp_server_send_one_user( SmtpServer *p, /* The current inbound email */ const char *zAddr, /* Who to forward this to */ int okRemote /* True if ok to foward to another domain */ ){ char *zPolicy; Blob policy, line, token, tail; zPolicy = db_text(0, "SELECT epolicy FROM emailroute WHERE eaddr=%Q", zAddr); if( zPolicy==0 ){ if( okRemote ){ int i; for(i=0; zAddr[i] && zAddr[i]!='@'; i++){} if( zAddr[i]=='@' && zAddr[i+1]!=0 ){ db_multi_exec( "INSERT INTO emailoutq(edomain,efrom,eto,emsgid,ectime," "emtime,ensend)" "VALUES(%Q,%Q,%Q,%lld,now(),0,0)", zAddr+i+1, p->zFrom, zAddr, p->idMsg ); p->nRef++; } } return; } blob_init(&policy, zPolicy, -1); while( blob_line(&policy, &line) ){ blob_trim(&line); blob_token(&line, &token); blob_tail(&line, &tail); if( blob_size(&tail)==0 ) continue; if( blob_eq_str(&token, "mbox", 4) ){ Blob subj; email_header_value(&p->msg, "subject", &subj); db_multi_exec( "INSERT INTO emailbox(euser,edate,efrom,emsgid,estate,esubject)" " VALUES(%Q,now(),%Q,%lld,0,%Q)", blob_str(&tail), p->zFrom, p->idMsg, blob_str(&subj) ); blob_reset(&subj); p->nRef++; } if( blob_eq_str(&token, "forward", 7) ){ smtp_append_to(p, fossil_strdup(blob_str(&tail)), 1); } blob_reset(&tail); } } /* ** The SmtpServer object contains a complete incoming email. ** Add this email to the database. */ static void smtp_server_route_incoming(SmtpServer *p, int bFinish){ Stmt s; int i; int nEtsStart = p->nEts; if( p->zFrom && p->nTo && blob_size(&p->msg) && (p->srvrFlags & SMTPSRV_DRYRUN)==0 ){ db_begin_write(); if( p->idTranscript==0 ) smtp_server_schema(0); p->nRef = 0; db_prepare(&s, "INSERT INTO emailblob(ets,etime,etxt,enref,esz)" " VALUES(:ets,now(),compress(:etxt),0,:esz)" ); p->nEts++; if( !bFinish && p->idTranscript==0 ){ db_bind_null(&s, ":ets"); db_bind_null(&s, ":etxt"); db_bind_null(&s, ":esz"); db_step(&s); db_reset(&s); p->idTranscript = db_last_insert_rowid(); }else if( bFinish ){ if( p->idTranscript ){ db_multi_exec( "UPDATE emailblob SET etxt=compress(%Q), enref=%d, esz=%d" " WHERE emailid=%lld", blob_str(&p->transcript), p->nEts, blob_size(&p->transcript), p->idTranscript); }else{ db_bind_null(&s, ":ets"); db_bind_str(&s, ":etxt", &p->transcript); db_bind_int(&s, ":esz", blob_size(&p->transcript)); db_step(&s); db_reset(&s); p->idTranscript = db_last_insert_rowid(); db_multi_exec( "UPDATE emailblob SET enref=%d WHERE emailid=%lld", p->nEts, p->idTranscript); } /* smtp_server_send(p, "221-Transcript id %lld nref %d\r\n", ** p->idTranscript, p->nEts); */ } db_bind_int64(&s, ":ets", p->idTranscript); db_bind_str(&s, ":etxt", &p->msg); db_bind_int(&s, ":esz", blob_size(&p->msg)); db_step(&s); db_finalize(&s); p->idMsg = db_last_insert_rowid(); /* make entries in emailbox and emailoutq */ for(i=0; i<p->nTo; i++){ int okRemote = p->aTo[i].okRemote; p->aTo[i].okRemote = 1; smtp_server_send_one_user(p, p->aTo[i].z, okRemote); } /* Fix up the emailblob.enref field of the email message body */ if( p->nRef ){ db_multi_exec( "UPDATE emailblob SET enref=%d WHERE emailid=%lld", p->nRef, p->idMsg ); }else{ db_multi_exec( "DELETE FROM emailblob WHERE emailid=%lld", p->idMsg ); p->nEts = nEtsStart; } /* Clean out legacy entries */ if( bFinish ){ db_multi_exec("DELETE FROM emailblob WHERE enref<=0"); } /* Finish the transaction after all changes are implemented */ db_commit_transaction(); } smtp_server_clear(p, SMTPSRV_CLEAR_MSG); } /* ** COMMAND: test-emailblob-refcheck ** ** Usage: %fossil test-emailblob-refcheck [--repair] [--full] [--clean] ** ** Verify that the emailblob.enref field is correct. Report any errors. ** Use the --repair command to fix up the enref field. The --full option ** gives a full report showing the enref value on all entries in the ** emailblob table. If the --clean flags is used together with --repair, ** then emailblob table entires with enref==0 are removed. */ void test_refcheck_emailblob(void){ int doRepair; int fullReport; int doClean; Blob sql; Stmt q; int nErr = 0; db_find_and_open_repository(0, 0); fullReport = find_option("full",0,0)!=0; doRepair = find_option("repair",0,0)!=0; doClean = find_option("clean",0,0)!=0; verify_all_options(); if( !db_table_exists("repository","emailblob") ){ fossil_print("emailblob table is not configured - nothing to check\n"); return; } db_multi_exec( "CREATE TEMP TABLE refcnt(id INTEGER PRIMARY KEY, n);" "INSERT INTO refcnt SELECT ets, count(*) FROM (" " SELECT ets FROM emailblob" " UNION ALL" " SELECT emsgid FROM emailbox" " UNION ALL" " SELECT emsgid FROM emailoutq" ") WHERE ets IS NOT NULL GROUP BY 1;" "INSERT OR IGNORE INTO refcnt(id,n) SELECT emailid, 0 FROM emailblob;" ); if( doRepair ){ db_multi_exec( "UPDATE emailblob SET enref=(SELECT n FROM refcnt WHERE id=emailid)" ); if( doClean ){ db_multi_exec( "UPDATE emailblob SET ets=NULL WHERE enref<=0;" "DELETE FROM emailblob WHERE enref<=0;" ); } } blob_init(&sql, 0, 0); blob_append_sql(&sql, "SELECT a.emailid, a.enref, b.n" " FROM emailblob AS a JOIN refcnt AS b ON a.emailid=b.id" ); if( !fullReport ){ blob_append_sql(&sql, " WHERE a.enref!=b.n"); } db_prepare_blob(&q, &sql); blob_reset(&sql); while( db_step(&q)==SQLITE_ROW ){ sqlite3_int64 id = db_column_int64(&q,0); int n1 = db_column_int(&q, 1); int n2 = db_column_int(&q, 2); if( n1!=n2 ) nErr++; fossil_print("%12lld %4d %4d%s\n", id, n1, n2, n1!=n2 ? " ERROR" : ""); } db_finalize(&q); if( nErr ){ fossil_print("Number of incorrect emailblob.enref values: %d\n",nErr); } } /* ** COMMAND: smtpd ** ** Usage: %fossil smtpd [OPTIONS] REPOSITORY ** ** Begin a SMTP conversation with a client using stdin/stdout. The ** received email is stored in REPOSITORY. ** ** Options: ** ** --dryrun Do not record any emails in the database ** ** --trace Print a transcript of the conversation on stderr ** for debugging and analysis ** ** --ipaddr ADDR The SMTP connection originates at ADDR. Or if ADDR ** is the name of an environment variable, the address ** is taken from that environment variable. */ void smtp_server(void){ char *zDbName; const char *zDomain; SmtpServer x; char z[5000]; smtp_server_init(&x); zDomain = find_option("domain",0,1); if( zDomain==0 ) zDomain = ""; x.srvrFlags = SMTPSRV_LOG; if( find_option("trace",0,0)!=0 ) x.srvrFlags |= SMTPSRV_STDERR; if( find_option("dryrun",0,0)!=0 ) x.srvrFlags |= SMTPSRV_DRYRUN; x.zIpAddr = find_option("ipaddr",0,1); if( x.zIpAddr ){ const char *zNew = fossil_getenv(x.zIpAddr); if( zNew && zNew[0] ) x.zIpAddr = zNew; } if( x.zIpAddr==0 ){ x.zIpAddr = cgi_remote_ip(0); if( x.zIpAddr==0 ) x.zIpAddr = "?.?.?.?"; } verify_all_options(); if( g.argc!=3 ) usage("DBNAME"); zDbName = g.argv[2]; zDbName = enter_chroot_jail(zDbName, 0); db_open_repository(zDbName); add_content_sql_commands(g.db); smtp_server_send(&x, "220 %s ESMTP https://fossil-scm.org/ %s\r\n", zDomain, MANIFEST_VERSION); while( smtp_server_gets(&x, z, sizeof(z)) ){ if( strncmp(z, "EHLO", 4)==0 && fossil_isspace(z[4]) ){ smtp_server_send(&x, "250 ok\r\n"); }else if( strncmp(z, "HELO", 4)==0 && fossil_isspace(z[4]) ){ smtp_server_send(&x, "250 ok\r\n"); }else if( strncmp(z, "MAIL FROM:<", 11)==0 ){ smtp_server_route_incoming(&x, 0); smtp_server_clear(&x, SMTPSRV_CLEAR_MSG); x.zFrom = email_copy_addr(z+11,'>'); if( x.zFrom==0 ){ smtp_server_send(&x, "500 unacceptable email address\r\n"); }else{ smtp_server_send(&x, "250 ok\r\n"); } }else if( strncmp(z, "RCPT TO:<", 9)==0 ){ char *zAddr; if( x.zFrom==0 ){ smtp_server_send(&x, "500 missing MAIL FROM\r\n"); continue; } zAddr = email_copy_addr(z+9, '>'); if( zAddr==0 ){ smtp_server_send(&x, "505 no such user\r\n"); continue; } smtp_append_to(&x, zAddr, 0); if( x.nTo>=100 ){ smtp_server_send(&x, "452 too many recipients\r\n"); continue; } smtp_server_send(&x, "250 ok\r\n"); }else if( strncmp(z, "DATA", 4)==0 && fossil_isspace(z[4]) ){ if( x.zFrom==0 || x.nTo==0 ){ smtp_server_send(&x, "500 missing RCPT TO\r\n"); continue; } smtp_server_send(&x, "354 ready\r\n"); smtp_server_prepend_header_lines(&x); smtp_server_capture_data(&x, z, sizeof(z)); smtp_server_send(&x, "250 ok\r\n"); }else if( strncmp(z, "QUIT", 4)==0 && fossil_isspace(z[4]) ){ smtp_server_route_incoming(&x, 1); smtp_server_send(&x, "221 closing connection\r\n"); break; }else { smtp_server_send(&x, "500 unknown command\r\n"); } } smtp_server_clear(&x, SMTPSRV_CLEAR_ALL); } /* ** Zero-terminate the argument. Return a pointer the start of the ** next argument, or to NULL if there are no more arguments. */ static char *pop3d_arg(char *z){ if( z[0]==0 || fossil_isspace(z[0]) ){ return 0; } z++; while( z[0] && !fossil_isspace(z[0]) ){ z++; } if( z[0]==0 ) return 0; z[0] = 0; z++; if( z[0]==0 || fossil_isspace(z[0]) ) return 0; return z; } /* ** Write formatted output back to the pop3 client, and also to the ** log file, if there is a log file. */ static void pop3_print(FILE *pLog, const char *zFormat, ...){ va_list ap; char zLine[500]; va_start(ap, zFormat); sqlite3_vsnprintf(sizeof(zLine),zLine,zFormat,ap); va_end(ap); printf("%s\r\n", zLine); fflush(stdout); if( pLog ) fprintf(pLog, "S: %s\n", zLine); } /* ** Try to log in for zUser and zPass. ** ** zUser can either point to a Fossil user name or to an email address ** found in the user table's info field, in angle brackets. */ static int pop3_login(const char *zUser, char *zPass){ return login_search_uid(&zUser, zPass) != 0; } /* ** COMMAND: pop3d ** ** Usage: %fossil pop3d [OPTIONS] REPOSITORY ** ** Begin a POP3 conversation with a client using stdin/stdout using ** the mailboxes stored in REPOSITORY. ** ** If launched as root, the process first enters a chroot jail using ** the directory of REPOSITORY as root, then drops all privileges and ** assumes the user and group of REPOSITORY before reading any content ** off of the wire. ** ** --logdir DIR Each pop3d session creates a new logfile ** in the directory DIR and records a transcript ** of the session there. The logfile is opened ** before entering the chroot jail. */ void pop3d_command(void){ char *zDbName; char *zA1, *zA2, *zCmd, *z; int inAuth = 1; int i; FILE *pLog = 0; const char *zDir; Stmt q; char zIn[1000]; char zUser[100]; zDir = find_option("logdir",0,1); if( zDir ){ char *zFile = file_time_tempname(zDir, ".txt"); pLog = fossil_fopen(zFile, "w"); fossil_free(zFile); } verify_all_options(); if( g.argc!=3 ) usage("DBNAME"); zDbName = g.argv[2]; zDbName = enter_chroot_jail(zDbName, 0); db_open_repository(zDbName); add_content_sql_commands(g.db); pop3_print(pLog, "+OK POP3 server ready"); while( fgets(zIn, sizeof(zIn), stdin) ){ if( pLog ) fprintf(pLog, "C: %s", zIn); zCmd = zIn; zA1 = pop3d_arg(zCmd); zA2 = zA1 ? pop3d_arg(zA1) : 0; for(i=0; zCmd[i]; i++){ zCmd[i] = fossil_tolower(zCmd[i]); } if( strcmp(zCmd,"quit")==0 ){ if( !inAuth ){ db_multi_exec( "UPDATE emailbox SET estate=2" " WHERE estate<2 AND ebid IN (SELECT ebid FROM pop3 WHERE isDel);" ); } pop3_print(pLog, "+OK"); break; } if( strcmp(zCmd,"capa")==0 ){ static const char *azCap[] = { "TOP", "USER", "UIDL", }; int i; pop3_print(pLog, "+OK"); for(i=0; i<sizeof(azCap)/sizeof(azCap[0]); i++){ pop3_print(pLog, azCap[i]); } pop3_print(pLog, "."); continue; } if( inAuth ){ if( strcmp(zCmd,"user")==0 ){ if( zA1==0 || zA2!=0 ) goto cmd_error; sqlite3_snprintf(sizeof(zUser),zUser,"%s",zA1); goto cmd_ok; } if( strcmp(zCmd,"pass")==0 ){ if( zA1==0 || zA2!=0 ) goto cmd_error; if( pop3_login(zUser,zA1)==0 ){ goto cmd_error; }else{ inAuth = 0; db_multi_exec( "CREATE TEMP TABLE pop3(" " id INTEGER PRIMARY KEY," " emailid INT," " ebid INT," " isDel INT," " esz INT" ");" "INSERT INTO pop3(id,emailid,ebid,isDel,esz)" " SELECT NULL, emailid, ebid, 0, esz FROM emailblob, emailbox" " WHERE emailid=emsgid AND euser=%Q AND estate<=1" " ORDER BY edate;", zUser ); goto cmd_ok; } } /* Fossil cannot process APOP since the users clear-text password is ** unknown. */ goto cmd_error; }else{ if( strcmp(zCmd,"stat")==0 ){ db_prepare(&q, "SELECT count(*), sum(esz) FROM pop3 WHERE NOT isDel"); if( db_step(&q)==SQLITE_ROW ){ pop3_print(pLog, "+OK %d %d", db_column_int(&q,0), db_column_int(&q,1)); }else{ pop3_print(pLog,"-ERR"); } db_finalize(&q); continue; } if( strcmp(zCmd,"list")==0 ){ if( zA1 ){ db_prepare(&q, "SELECT id, esz FROM pop3" " WHERE id=%d AND NOT isDel", atoi(zA1)); if( db_step(&q)==SQLITE_ROW ){ pop3_print(pLog, "+OK %d %d", db_column_int(&q,0), db_column_int(&q,1)); }else{ pop3_print(pLog, "-ERR"); } }else{ pop3_print(pLog, "+OK"); db_prepare(&q, "SELECT id, esz FROM pop3 WHERE NOT isDel"); while( db_step(&q)==SQLITE_ROW ){ pop3_print(pLog, "%d %d", db_column_int(&q,0), db_column_int(&q,1)); } pop3_print(pLog, "."); } db_finalize(&q); continue; } if( strcmp(zCmd,"retr")==0 || strcmp(zCmd,"top")==0 ){ Blob all, line; int nLine = 0; int iLimit; int hdrPending = 1; if( zA1==0 ) goto cmd_error; iLimit = zA2 ? atoi(zA2) : 2147483647; if( iLimit<0 ) goto cmd_error; z = db_text(0, "SELECT decompress(emailblob.etxt) " " FROM emailblob, pop3" " WHERE emailblob.emailid=pop3.emailid" " AND pop3.id=%d AND NOT pop3.isDel", atoi(zA1)); if( z==0 ) goto cmd_error; pop3_print(pLog, "+OK"); blob_init(&all, z, -1); while( (hdrPending || iLimit>0) && blob_line(&all, &line) ){ char c = blob_buffer(&line)[0]; if( c=='.' ){ fputc('.', stdout); }else if( c=='\r' || c=='\n' ){ hdrPending = 0; } fwrite(blob_buffer(&line), 1, blob_size(&line), stdout); nLine++; if( !hdrPending ) iLimit--; } if( pLog ) fprintf(pLog, "S: # %d lines of content\n", nLine); pop3_print(pLog, "."); fossil_free(z); blob_reset(&all); blob_reset(&line); fflush(stdout); continue; } if( strcmp(zCmd,"dele")==0 ){ if( zA1==0 ) goto cmd_error; db_multi_exec("UPDATE pop3 SET isDel=1 WHERE id=%d",atoi(zA1)); goto cmd_ok; } if( strcmp(zCmd,"rset")==0 ){ db_multi_exec("UPDATE pop3 SET isDel=0"); goto cmd_ok; } if( strcmp(zCmd,"uidl")==0 ){ if( zA1 ){ db_prepare(&q, "SELECT id, emailid FROM pop3" " WHERE id=%d AND NOT isDel", atoi(zA1)); if( db_step(&q)==SQLITE_ROW ){ pop3_print(pLog, "+OK %d %d", db_column_int(&q,0), db_column_int(&q,1)); }else{ pop3_print(pLog,"-ERR"); } }else{ pop3_print(pLog, "+OK"); db_prepare(&q, "SELECT id, emailid FROM pop3 WHERE NOT isDel"); while( db_step(&q)==SQLITE_ROW ){ pop3_print(pLog, "%d %d", db_column_int(&q,0), db_column_int(&q,1)); } pop3_print(pLog, "."); } db_finalize(&q); continue; } if( strcmp(zCmd,"noop")==0 ){ goto cmd_ok; } /* Else, fall through into cmd_error */ } cmd_error: pop3_print(pLog, "-ERR"); continue; cmd_ok: pop3_print(pLog, "+OK"); continue; } if( pLog ) fclose(pLog); }