Net_apps.rar_Net_apps_ddns_nucleus_ucos_ucos mp3

/* * Copyright (c) 1998-2004 Sendmail, Inc. and its suppliers. * All rights reserved. * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved. * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * By using this file, you agree to the terms and conditions set * forth in the LICENSE file which can be found at the top level of * the sendmail distribution. * */ #include <sendmail.h> #if MILTER # include <libmilter/mfapi.h> # include <libmilter/mfdef.h> #endif /* MILTER */ SM_RCSID("@(#)$Id: srvrsmtp.c,v 8.900 2004/07/08 23:29:33 ca Exp $") #include <sys/time.h> #include <sm/fdset.h> #if SASL || STARTTLS # include "sfsasl.h" #endif /* SASL || STARTTLS */ #if SASL # define ENC64LEN(l) (((l) + 2) * 4 / 3 + 1) static int saslmechs __P((sasl_conn_t *, char **)); #endif /* SASL */ #if STARTTLS # include <sysexits.h> static SSL_CTX *srv_ctx = NULL; /* TLS server context */ static SSL *srv_ssl = NULL; /* per connection context */ static bool tls_ok_srv = false; extern void tls_set_verify __P((SSL_CTX *, SSL *, bool)); # define TLS_VERIFY_CLIENT() tls_set_verify(srv_ctx, srv_ssl, \ bitset(SRV_VRFY_CLT, features)) #endif /* STARTTLS */ /* server features */ #define SRV_NONE 0x0000 /* none... */ #define SRV_OFFER_TLS 0x0001 /* offer STARTTLS */ #define SRV_VRFY_CLT 0x0002 /* request a cert */ #define SRV_OFFER_AUTH 0x0004 /* offer AUTH */ #define SRV_OFFER_ETRN 0x0008 /* offer ETRN */ #define SRV_OFFER_VRFY 0x0010 /* offer VRFY (not yet used) */ #define SRV_OFFER_EXPN 0x0020 /* offer EXPN */ #define SRV_OFFER_VERB 0x0040 /* offer VERB */ #define SRV_OFFER_DSN 0x0080 /* offer DSN */ #if PIPELINING # define SRV_OFFER_PIPE 0x0100 /* offer PIPELINING */ # if _FFR_NO_PIPE # define SRV_NO_PIPE 0x0200 /* disable PIPELINING, sleep if used */ # endif /* _FFR_NO_PIPE */ #endif /* PIPELINING */ #define SRV_REQ_AUTH 0x0400 /* require AUTH */ #define SRV_REQ_SEC 0x0800 /* require security - equiv to AuthOptions=p */ #define SRV_TMP_FAIL 0x1000 /* ruleset caused a temporary failure */ static unsigned int srvfeatures __P((ENVELOPE *, char *, unsigned int)); #define STOP_ATTACK ((time_t) -1) static time_t checksmtpattack __P((volatile unsigned int *, unsigned int, bool, char *, ENVELOPE *)); static void mail_esmtp_args __P((char *, char *, ENVELOPE *)); static void printvrfyaddr __P((ADDRESS *, bool, bool)); static void rcpt_esmtp_args __P((ADDRESS *, char *, char *, ENVELOPE *)); static char *skipword __P((char *volatile, char *)); static void setup_smtpd_io __P((void)); #if SASL # if SASL >= 20000 static int reset_saslconn __P((sasl_conn_t **_conn, char *_hostname, char *_remoteip, char *_localip, char *_auth_id, sasl_ssf_t *_ext_ssf)); # define RESET_SASLCONN \ result = reset_saslconn(&conn, AuthRealm, remoteip, localip, auth_id, \ &ext_ssf); \ if (result != SASL_OK) \ { \ /* This is pretty fatal */ \ goto doquit; \ } # else /* SASL >= 20000 */ static int reset_saslconn __P((sasl_conn_t **_conn, char *_hostname, struct sockaddr_in *_saddr_r, struct sockaddr_in *_saddr_l, sasl_external_properties_t *_ext_ssf)); # define RESET_SASLCONN \ result = reset_saslconn(&conn, AuthRealm, &saddr_r, &saddr_l, &ext_ssf); \ if (result != SASL_OK) \ { \ /* This is pretty fatal */ \ goto doquit; \ } # endif /* SASL >= 20000 */ #endif /* SASL */ extern ENVELOPE BlankEnvelope; #define NBADRCPTS \ do \ { \ char buf[16]; \ (void) sm_snprintf(buf, sizeof buf, "%d", \ BadRcptThrottle > 0 && n_badrcpts > BadRcptThrottle \ ? n_badrcpts - 1 : n_badrcpts); \ macdefine(&e->e_macro, A_TEMP, macid("{nbadrcpts}"), buf); \ } while (0) #define SKIP_SPACE(s) while (isascii(*s) && isspace(*s)) \ (s)++ /* ** SMTP -- run the SMTP protocol. ** ** Parameters: ** nullserver -- if non-NULL, rejection message for ** (almost) all SMTP commands. ** d_flags -- daemon flags ** e -- the envelope. ** ** Returns: ** never. ** ** Side Effects: ** Reads commands from the input channel and processes them. */ /* ** Notice: The smtp server doesn't have a session context like the client ** side has (mci). Therefore some data (session oriented) is allocated ** or assigned to the "wrong" structure (esp. STARTTLS, AUTH). ** This should be fixed in a successor version. */ struct cmd { char *cmd_name; /* command name */ int cmd_code; /* internal code, see below */ }; /* values for cmd_code */ #define CMDERROR 0 /* bad command */ #define CMDMAIL 1 /* mail -- designate sender */ #define CMDRCPT 2 /* rcpt -- designate recipient */ #define CMDDATA 3 /* data -- send message text */ #define CMDRSET 4 /* rset -- reset state */ #define CMDVRFY 5 /* vrfy -- verify address */ #define CMDEXPN 6 /* expn -- expand address */ #define CMDNOOP 7 /* noop -- do nothing */ #define CMDQUIT 8 /* quit -- close connection and die */ #define CMDHELO 9 /* helo -- be polite */ #define CMDHELP 10 /* help -- give usage info */ #define CMDEHLO 11 /* ehlo -- extended helo (RFC 1425) */ #define CMDETRN 12 /* etrn -- flush queue */ #if SASL # define CMDAUTH 13 /* auth -- SASL authenticate */ #endif /* SASL */ #if STARTTLS # define CMDSTLS 14 /* STARTTLS -- start TLS session */ #endif /* STARTTLS */ /* non-standard commands */ #define CMDVERB 17 /* verb -- go into verbose mode */ /* unimplemented commands from RFC 821 */ #define CMDUNIMPL 19 /* unimplemented rfc821 commands */ /* use this to catch and log "door handle" attempts on your system */ #define CMDLOGBOGUS 23 /* bogus command that should be logged */ /* debugging-only commands, only enabled if SMTPDEBUG is defined */ #define CMDDBGQSHOW 24 /* showq -- show send queue */ #define CMDDBGDEBUG 25 /* debug -- set debug mode */ /* ** Note: If you change this list, remember to update 'helpfile' */ static struct cmd CmdTab[] = { { "mail", CMDMAIL }, { "rcpt", CMDRCPT }, { "data", CMDDATA }, { "rset", CMDRSET }, { "vrfy", CMDVRFY }, { "expn", CMDEXPN }, { "help", CMDHELP }, { "noop", CMDNOOP }, { "quit", CMDQUIT }, { "helo", CMDHELO }, { "ehlo", CMDEHLO }, { "etrn", CMDETRN }, { "verb", CMDVERB }, { "send", CMDUNIMPL }, { "saml", CMDUNIMPL }, { "soml", CMDUNIMPL }, { "turn", CMDUNIMPL }, #if SASL { "auth", CMDAUTH, }, #endif /* SASL */ #if STARTTLS { "starttls", CMDSTLS, }, #endif /* STARTTLS */ /* remaining commands are here only to trap and log attempts to use them */ { "showq", CMDDBGQSHOW }, { "debug", CMDDBGDEBUG }, { "wiz", CMDLOGBOGUS }, { NULL, CMDERROR } }; static char *CurSmtpClient; /* who's at the other end of channel */ #ifndef MAXBADCOMMANDS # define MAXBADCOMMANDS 25 /* maximum number of bad commands */ #endif /* ! MAXBADCOMMANDS */ #ifndef MAXNOOPCOMMANDS # define MAXNOOPCOMMANDS 20 /* max "noise" commands before slowdown */ #endif /* ! MAXNOOPCOMMANDS */ #ifndef MAXHELOCOMMANDS # define MAXHELOCOMMANDS 3 /* max HELO/EHLO commands before slowdown */ #endif /* ! MAXHELOCOMMANDS */ #ifndef MAXVRFYCOMMANDS # define MAXVRFYCOMMANDS 6 /* max VRFY/EXPN commands before slowdown */ #endif /* ! MAXVRFYCOMMANDS */ #ifndef MAXETRNCOMMANDS # define MAXETRNCOMMANDS 8 /* max ETRN commands before slowdown */ #endif /* ! MAXETRNCOMMANDS */ #ifndef MAXTIMEOUT # define MAXTIMEOUT (4 * 60) /* max timeout for bad commands */ #endif /* ! MAXTIMEOUT */ /* ** Maximum shift value to compute timeout for bad commands. ** This introduces an upper limit of 2^MAXSHIFT for the timeout. */ #ifndef MAXSHIFT # define MAXSHIFT 8 #endif /* ! MAXSHIFT */ #if MAXSHIFT > 31 ERROR _MAXSHIFT > 31 is invalid #endif /* MAXSHIFT */ #if MAXBADCOMMANDS > 0 # define STOP_IF_ATTACK(r) do \ { \ if ((r) == STOP_ATTACK) \ goto