diff options
Diffstat (limited to 'contrib/sendmail/src/udb.c')
| -rw-r--r-- | contrib/sendmail/src/udb.c | 1314 |
1 files changed, 0 insertions, 1314 deletions
diff --git a/contrib/sendmail/src/udb.c b/contrib/sendmail/src/udb.c deleted file mode 100644 index 29470e7..0000000 --- a/contrib/sendmail/src/udb.c +++ /dev/null @@ -1,1314 +0,0 @@ -/* - * Copyright (c) 1998-2003, 2006 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> -#include "map.h" - -#if USERDB -SM_RCSID("@(#)$Id: udb.c,v 8.164 2006/12/19 19:49:51 ca Exp $ (with USERDB)") -#else /* USERDB */ -SM_RCSID("@(#)$Id: udb.c,v 8.164 2006/12/19 19:49:51 ca Exp $ (without USERDB)") -#endif /* USERDB */ - -#if USERDB - -#include <sm/sendmail.h> -# if NEWDB -# include "sm/bdb.h" -# else /* NEWDB */ -# define DBT struct _data_base_thang_ -DBT -{ - void *data; /* pointer to data */ - size_t size; /* length of data */ -}; -# endif /* NEWDB */ - -/* -** UDB.C -- interface between sendmail and Berkeley User Data Base. -** -** This depends on the 4.4BSD db package. -*/ - - -struct udbent -{ - char *udb_spec; /* string version of spec */ - int udb_type; /* type of entry */ - pid_t udb_pid; /* PID of process which opened db */ - char *udb_default; /* default host for outgoing mail */ - union - { -# if NETINET || NETINET6 - /* type UE_REMOTE -- do remote call for lookup */ - struct - { - SOCKADDR _udb_addr; /* address */ - int _udb_timeout; /* timeout */ - } udb_remote; -# define udb_addr udb_u.udb_remote._udb_addr -# define udb_timeout udb_u.udb_remote._udb_timeout -# endif /* NETINET || NETINET6 */ - - /* type UE_FORWARD -- forward message to remote */ - struct - { - char *_udb_fwdhost; /* name of forward host */ - } udb_forward; -# define udb_fwdhost udb_u.udb_forward._udb_fwdhost - -# if NEWDB - /* type UE_FETCH -- lookup in local database */ - struct - { - char *_udb_dbname; /* pathname of database */ - DB *_udb_dbp; /* open database ptr */ - } udb_lookup; -# define udb_dbname udb_u.udb_lookup._udb_dbname -# define udb_dbp udb_u.udb_lookup._udb_dbp -# endif /* NEWDB */ - } udb_u; -}; - -# define UDB_EOLIST 0 /* end of list */ -# define UDB_SKIP 1 /* skip this entry */ -# define UDB_REMOTE 2 /* look up in remote database */ -# define UDB_DBFETCH 3 /* look up in local database */ -# define UDB_FORWARD 4 /* forward to remote host */ -# define UDB_HESIOD 5 /* look up via hesiod */ - -# define MAXUDBENT 10 /* maximum number of UDB entries */ - - -struct udb_option -{ - char *udbo_name; - char *udbo_val; -}; - -# if HESIOD -static int hes_udb_get __P((DBT *, DBT *)); -# endif /* HESIOD */ -static char *udbmatch __P((char *, char *, SM_RPOOL_T *)); -static int _udbx_init __P((ENVELOPE *)); -static int _udb_parsespec __P((char *, struct udb_option [], int)); - -/* -** UDBEXPAND -- look up user in database and expand -** -** Parameters: -** a -- address to expand. -** sendq -- pointer to head of sendq to put the expansions in. -** aliaslevel -- the current alias nesting depth. -** e -- the current envelope. -** -** Returns: -** EX_TEMPFAIL -- if something "odd" happened -- probably due -** to accessing a file on an NFS server that is down. -** EX_OK -- otherwise. -** -** Side Effects: -** Modifies sendq. -*/ - -static struct udbent UdbEnts[MAXUDBENT + 1]; -static bool UdbInitialized = false; - -int -udbexpand(a, sendq, aliaslevel, e) - register ADDRESS *a; - ADDRESS **sendq; - int aliaslevel; - register ENVELOPE *e; -{ - int i; - DBT key; - DBT info; - bool breakout; - register struct udbent *up; - int keylen; - int naddrs; - char *user; - char keybuf[MAXUDBKEY]; - - memset(&key, '\0', sizeof(key)); - memset(&info, '\0', sizeof(info)); - - if (tTd(28, 1)) - sm_dprintf("udbexpand(%s)\n", a->q_paddr); - - /* make certain we are supposed to send to this address */ - if (!QS_IS_SENDABLE(a->q_state)) - return EX_OK; - e->e_to = a->q_paddr; - - /* on first call, locate the database */ - if (!UdbInitialized) - { - if (_udbx_init(e) == EX_TEMPFAIL) - return EX_TEMPFAIL; - } - - /* short circuit the process if no chance of a match */ - if (UdbSpec == NULL || UdbSpec[0] == '\0') - return EX_OK; - - /* extract user to do userdb matching on */ - user = a->q_user; - - /* short circuit name begins with '\\' since it can't possibly match */ - /* (might want to treat this as unquoted instead) */ - if (user[0] == '\\') - return EX_OK; - - /* if name begins with a colon, it indicates our metadata */ - if (user[0] == ':') - return EX_OK; - - keylen = sm_strlcpyn(keybuf, sizeof(keybuf), 2, user, ":maildrop"); - - /* if name is too long, assume it won't match */ - if (keylen >= sizeof(keybuf)) - return EX_OK; - - /* build actual database key */ - - breakout = false; - for (up = UdbEnts; !breakout; up++) - { - int usersize; - int userleft; - char userbuf[MEMCHUNKSIZE]; -# if HESIOD && HES_GETMAILHOST - char pobuf[MAXNAME]; -# endif /* HESIOD && HES_GETMAILHOST */ -# if defined(NEWDB) && DB_VERSION_MAJOR > 1 - DBC *dbc = NULL; -# endif /* defined(NEWDB) && DB_VERSION_MAJOR > 1 */ - - user = userbuf; - userbuf[0] = '\0'; - usersize = sizeof(userbuf); - userleft = sizeof(userbuf) - 1; - - /* - ** Select action based on entry type. - ** - ** On dropping out of this switch, "class" should - ** explain the type of the data, and "user" should - ** contain the user information. - */ - - switch (up->udb_type) - { -# if NEWDB - case UDB_DBFETCH: - key.data = keybuf; - key.size = keylen; - if (tTd(28, 80)) - sm_dprintf("udbexpand: trying %s (%d) via db\n", - keybuf, keylen); -# if DB_VERSION_MAJOR < 2 - i = (*up->udb_dbp->seq)(up->udb_dbp, &key, &info, R_CURSOR); -# else /* DB_VERSION_MAJOR < 2 */ - i = 0; - if (dbc == NULL && -# if DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >= 6 - (errno = (*up->udb_dbp->cursor)(up->udb_dbp, - NULL, &dbc, 0)) != 0) -# else /* DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >= 6 */ - (errno = (*up->udb_dbp->cursor)(up->udb_dbp, - NULL, &dbc)) != 0) -# endif /* DB_VERSION_MAJOR > 2 || DB_VERSION_MINOR >= 6 */ - i = -1; - if (i != 0 || dbc == NULL || - (errno = dbc->c_get(dbc, &key, - &info, DB_SET)) != 0) - i = 1; -# endif /* DB_VERSION_MAJOR < 2 */ - if (i > 0 || info.size <= 0) - { - if (tTd(28, 2)) - sm_dprintf("udbexpand: no match on %s (%d)\n", - keybuf, keylen); -# if DB_VERSION_MAJOR > 1 - if (dbc != NULL) - { - (void) dbc->c_close(dbc); - dbc = NULL; - } -# endif /* DB_VERSION_MAJOR > 1 */ - break; - } - if (tTd(28, 80)) - sm_dprintf("udbexpand: match %.*s: %.*s\n", - (int) key.size, (char *) key.data, - (int) info.size, (char *) info.data); - - a->q_flags &= ~QSELFREF; - while (i == 0 && key.size == keylen && - memcmp(key.data, keybuf, keylen) == 0) - { - char *p; - - if (bitset(EF_VRFYONLY, e->e_flags)) - { - a->q_state = QS_VERIFIED; -# if DB_VERSION_MAJOR > 1 - if (dbc != NULL) - { - (void) dbc->c_close(dbc); - dbc = NULL; - } -# endif /* DB_VERSION_MAJOR > 1 */ - return EX_OK; - } - - breakout = true; - if (info.size >= userleft - 1) - { - char *nuser; - int size = MEMCHUNKSIZE; - - if (info.size > MEMCHUNKSIZE) - size = info.size; - nuser = sm_malloc_x(usersize + size); - - memmove(nuser, user, usersize); - if (user != userbuf) - sm_free(user); /* XXX */ - user = nuser; - usersize += size; - userleft += size; - } - p = &user[strlen(user)]; - if (p != user) - { - *p++ = ','; - userleft--; - } - memmove(p, info.data, info.size); - p[info.size] = '\0'; - userleft -= info.size; - - /* get the next record */ -# if DB_VERSION_MAJOR < 2 - i = (*up->udb_dbp->seq)(up->udb_dbp, &key, &info, R_NEXT); -# else /* DB_VERSION_MAJOR < 2 */ - i = 0; - if ((errno = dbc->c_get(dbc, &key, - &info, DB_NEXT)) != 0) - i = 1; -# endif /* DB_VERSION_MAJOR < 2 */ - } - -# if DB_VERSION_MAJOR > 1 - if (dbc != NULL) - { - (void) dbc->c_close(dbc); - dbc = NULL; - } -# endif /* DB_VERSION_MAJOR > 1 */ - - /* if nothing ever matched, try next database */ - if (!breakout) - break; - - message("expanded to %s", user); - if (LogLevel > 10) - sm_syslog(LOG_INFO, e->e_id, - "expand %.100s => %s", - e->e_to, - shortenstring(user, MAXSHORTSTR)); - naddrs = sendtolist(user, a, sendq, aliaslevel + 1, e); - if (naddrs > 0 && !bitset(QSELFREF, a->q_flags)) - { - if (tTd(28, 5)) - { - sm_dprintf("udbexpand: QS_EXPANDED "); - printaddr(sm_debug_file(), a, false); - } - a->q_state = QS_EXPANDED; - } - if (i < 0) - { - syserr("udbexpand: db-get %.*s stat %d", - (int) key.size, (char *) key.data, i); - return EX_TEMPFAIL; - } - - /* - ** If this address has a -request address, reflect - ** it into the envelope. - */ - - memset(&key, '\0', sizeof(key)); - memset(&info, '\0', sizeof(info)); - (void) sm_strlcpyn(keybuf, sizeof(keybuf), 2, a->q_user, - ":mailsender"); - keylen = strlen(keybuf); - key.data = keybuf; - key.size = keylen; - -# if DB_VERSION_MAJOR < 2 - i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); -# else /* DB_VERSION_MAJOR < 2 */ - i = errno = (*up->udb_dbp->get)(up->udb_dbp, NULL, - &key, &info, 0); -# endif /* DB_VERSION_MAJOR < 2 */ - if (i != 0 || info.size <= 0) - break; - a->q_owner = sm_rpool_malloc_x(e->e_rpool, - info.size + 1); - memmove(a->q_owner, info.data, info.size); - a->q_owner[info.size] = '\0'; - - /* announce delivery; NORECEIPT bit set later */ - if (e->e_xfp != NULL) - { - (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, - "Message delivered to mailing list %s\n", - a->q_paddr); - } - e->e_flags |= EF_SENDRECEIPT; - a->q_flags |= QDELIVERED|QEXPANDED; - break; -# endif /* NEWDB */ - -# if HESIOD - case UDB_HESIOD: - key.data = keybuf; - key.size = keylen; - if (tTd(28, 80)) - sm_dprintf("udbexpand: trying %s (%d) via hesiod\n", - keybuf, keylen); - /* look up the key via hesiod */ - i = hes_udb_get(&key, &info); - if (i < 0) - { - syserr("udbexpand: hesiod-get %.*s stat %d", - (int) key.size, (char *) key.data, i); - return EX_TEMPFAIL; - } - else if (i > 0 || info.size <= 0) - { -# if HES_GETMAILHOST - struct hes_postoffice *hp; -# endif /* HES_GETMAILHOST */ - - if (tTd(28, 2)) - sm_dprintf("udbexpand: no match on %s (%d)\n", - (char *) keybuf, (int) keylen); -# if HES_GETMAILHOST - if (tTd(28, 8)) - sm_dprintf(" ... trying hes_getmailhost(%s)\n", - a->q_user); - hp = hes_getmailhost(a->q_user); - if (hp == NULL) - { - if (hes_error() == HES_ER_NET) - { - syserr("udbexpand: hesiod-getmail %s stat %d", - a->q_user, hes_error()); - return EX_TEMPFAIL; - } - if (tTd(28, 2)) - sm_dprintf("hes_getmailhost(%s): %d\n", - a->q_user, hes_error()); - break; - } - if (strlen(hp->po_name) + strlen(hp->po_host) > - sizeof(pobuf) - 2) - { - if (tTd(28, 2)) - sm_dprintf("hes_getmailhost(%s): expansion too long: %.30s@%.30s\n", - a->q_user, - hp->po_name, - hp->po_host); - break; - } - info.data = pobuf; - (void) sm_snprintf(pobuf, sizeof(pobuf), - "%s@%s", hp->po_name, hp->po_host); - info.size = strlen(info.data); -# else /* HES_GETMAILHOST */ - break; -# endif /* HES_GETMAILHOST */ - } - if (tTd(28, 80)) - sm_dprintf("udbexpand: match %.*s: %.*s\n", - (int) key.size, (char *) key.data, - (int) info.size, (char *) info.data); - a->q_flags &= ~QSELFREF; - - if (bitset(EF_VRFYONLY, e->e_flags)) - { - a->q_state = QS_VERIFIED; - return EX_OK; - } - - breakout = true; - if (info.size >= usersize) - user = sm_malloc_x(info.size + 1); - memmove(user, info.data, info.size); - user[info.size] = '\0'; - - message("hesioded to %s", user); - if (LogLevel > 10) - sm_syslog(LOG_INFO, e->e_id, - "hesiod %.100s => %s", - e->e_to, - shortenstring(user, MAXSHORTSTR)); - naddrs = sendtolist(user, a, sendq, aliaslevel + 1, e); - - if (naddrs > 0 && !bitset(QSELFREF, a->q_flags)) - { - if (tTd(28, 5)) - { - sm_dprintf("udbexpand: QS_EXPANDED "); - printaddr(sm_debug_file(), a, false); - } - a->q_state = QS_EXPANDED; - } - - /* - ** If this address has a -request address, reflect - ** it into the envelope. - */ - - (void) sm_strlcpyn(keybuf, sizeof(keybuf), 2, a->q_user, - ":mailsender"); - keylen = strlen(keybuf); - key.data = keybuf; - key.size = keylen; - i = hes_udb_get(&key, &info); - if (i != 0 || info.size <= 0) - break; - a->q_owner = sm_rpool_malloc_x(e->e_rpool, - info.size + 1); - memmove(a->q_owner, info.data, info.size); - a->q_owner[info.size] = '\0'; - break; -# endif /* HESIOD */ - - case UDB_REMOTE: - /* not yet implemented */ - break; - - case UDB_FORWARD: - if (bitset(EF_VRFYONLY, e->e_flags)) - { - a->q_state = QS_VERIFIED; - return EX_OK; - } - i = strlen(up->udb_fwdhost) + strlen(a->q_user) + 1; - if (i >= usersize) - { - usersize = i + 1; - user = sm_malloc_x(usersize); - } - (void) sm_strlcpyn(user, usersize, 3, - a->q_user, "@", up->udb_fwdhost); - message("expanded to %s", user); - a->q_flags &= ~QSELFREF; - naddrs = sendtolist(user, a, sendq, aliaslevel + 1, e); - if (naddrs > 0 && !bitset(QSELFREF, a->q_flags)) - { - if (tTd(28, 5)) - { - sm_dprintf("udbexpand: QS_EXPANDED "); - printaddr(sm_debug_file(), a, false); - } - a->q_state = QS_EXPANDED; - } - breakout = true; - break; - - case UDB_EOLIST: - breakout = true; - break; - - default: - /* unknown entry type */ - break; - } - /* XXX if an exception occurs, there is a storage leak */ - if (user != userbuf) - sm_free(user); /* XXX */ - } - return EX_OK; -} -/* -** UDBSENDER -- return canonical external name of sender, given local name -** -** Parameters: -** sender -- the name of the sender on the local machine. -** rpool -- resource pool from which to allocate result -** -** Returns: -** The external name for this sender, if derivable from the -** database. Storage allocated from rpool. -** NULL -- if nothing is changed from the database. -** -** Side Effects: -** none. -*/ - -char * -udbsender(sender, rpool) - char *sender; - SM_RPOOL_T *rpool; -{ - return udbmatch(sender, "mailname", rpool); -} -/* -** UDBMATCH -- match user in field, return result of lookup. -** -** Parameters: -** user -- the name of the user. -** field -- the field to lookup. -** rpool -- resource pool from which to allocate result -** -** Returns: -** The external name for this sender, if derivable from the -** database. Storage allocated from rpool. -** NULL -- if nothing is changed from the database. -** -** Side Effects: -** none. -*/ - -static char * -udbmatch(user, field, rpool) - char *user; - char *field; - SM_RPOOL_T *rpool; -{ - register char *p; - register struct udbent *up; - int i; - int keylen; - DBT key, info; - char keybuf[MAXUDBKEY]; - - if (tTd(28, 1)) - sm_dprintf("udbmatch(%s, %s)\n", user, field); - - if (!UdbInitialized) - { - if (_udbx_init(CurEnv) == EX_TEMPFAIL) - return NULL; - } - - /* short circuit if no spec */ - if (UdbSpec == NULL || UdbSpec[0] == '\0') - return NULL; - - /* short circuit name begins with '\\' since it can't possibly match */ - if (user[0] == '\\') - return NULL; - - /* long names can never match and are a pain to deal with */ - i = strlen(field); - if (i < sizeof("maildrop")) - i = sizeof("maildrop"); - if ((strlen(user) + i) > sizeof(keybuf) - 4) - return NULL; - - /* names beginning with colons indicate metadata */ - if (user[0] == ':') - return NULL; - - /* build database key */ - (void) sm_strlcpyn(keybuf, sizeof(keybuf), 3, user, ":", field); - keylen = strlen(keybuf); - - for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) - { - /* - ** Select action based on entry type. - */ - - switch (up->udb_type) - { -# if NEWDB - case UDB_DBFETCH: - memset(&key, '\0', sizeof(key)); - memset(&info, '\0', sizeof(info)); - key.data = keybuf; - key.size = keylen; -# if DB_VERSION_MAJOR < 2 - i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); -# else /* DB_VERSION_MAJOR < 2 */ - i = errno = (*up->udb_dbp->get)(up->udb_dbp, NULL, - &key, &info, 0); -# endif /* DB_VERSION_MAJOR < 2 */ - if (i != 0 || info.size <= 0) - { - if (tTd(28, 2)) - sm_dprintf("udbmatch: no match on %s (%d) via db\n", - keybuf, keylen); - continue; - } - - p = sm_rpool_malloc_x(rpool, info.size + 1); - memmove(p, info.data, info.size); - p[info.size] = '\0'; - if (tTd(28, 1)) - sm_dprintf("udbmatch ==> %s\n", p); - return p; -# endif /* NEWDB */ - -# if HESIOD - case UDB_HESIOD: - key.data = keybuf; - key.size = keylen; - i = hes_udb_get(&key, &info); - if (i != 0 || info.size <= 0) - { - if (tTd(28, 2)) - sm_dprintf("udbmatch: no match on %s (%d) via hesiod\n", - keybuf, keylen); - continue; - } - - p = sm_rpool_malloc_x(rpool, info.size + 1); - memmove(p, info.data, info.size); - p[info.size] = '\0'; - if (tTd(28, 1)) - sm_dprintf("udbmatch ==> %s\n", p); - return p; -# endif /* HESIOD */ - } - } - - if (strcmp(field, "mailname") != 0) - return NULL; - - /* - ** Nothing yet. Search again for a default case. But only - ** use it if we also have a forward (:maildrop) pointer already - ** in the database. - */ - - /* build database key */ - (void) sm_strlcpyn(keybuf, sizeof(keybuf), 2, user, ":maildrop"); - keylen = strlen(keybuf); - - for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) - { - switch (up->udb_type) - { -# if NEWDB - case UDB_DBFETCH: - /* get the default case for this database */ - if (up->udb_default == NULL) - { - memset(&key, '\0', sizeof(key)); - memset(&info, '\0', sizeof(info)); - key.data = ":default:mailname"; - key.size = strlen(key.data); -# if DB_VERSION_MAJOR < 2 - i = (*up->udb_dbp->get)(up->udb_dbp, - &key, &info, 0); -# else /* DB_VERSION_MAJOR < 2 */ - i = errno = (*up->udb_dbp->get)(up->udb_dbp, - NULL, &key, - &info, 0); -# endif /* DB_VERSION_MAJOR < 2 */ - if (i != 0 || info.size <= 0) - { - /* no default case */ - up->udb_default = ""; - continue; - } - - /* save the default case */ - up->udb_default = sm_pmalloc_x(info.size + 1); - memmove(up->udb_default, info.data, info.size); - up->udb_default[info.size] = '\0'; - } - else if (up->udb_default[0] == '\0') - continue; - - /* we have a default case -- verify user:maildrop */ - memset(&key, '\0', sizeof(key)); - memset(&info, '\0', sizeof(info)); - key.data = keybuf; - key.size = keylen; -# if DB_VERSION_MAJOR < 2 - i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); -# else /* DB_VERSION_MAJOR < 2 */ - i = errno = (*up->udb_dbp->get)(up->udb_dbp, NULL, - &key, &info, 0); -# endif /* DB_VERSION_MAJOR < 2 */ - if (i != 0 || info.size <= 0) - { - /* nope -- no aliasing for this user */ - continue; - } - - /* they exist -- build the actual address */ - i = strlen(user) + strlen(up->udb_default) + 2; - p = sm_rpool_malloc_x(rpool, i); - (void) sm_strlcpyn(p, i, 3, user, "@", up->udb_default); - if (tTd(28, 1)) - sm_dprintf("udbmatch ==> %s\n", p); - return p; -# endif /* NEWDB */ - -# if HESIOD - case UDB_HESIOD: - /* get the default case for this database */ - if (up->udb_default == NULL) - { - key.data = ":default:mailname"; - key.size = strlen(key.data); - i = hes_udb_get(&key, &info); - - if (i != 0 || info.size <= 0) - { - /* no default case */ - up->udb_default = ""; - continue; - } - - /* save the default case */ - up->udb_default = sm_pmalloc_x(info.size + 1); - memmove(up->udb_default, info.data, info.size); - up->udb_default[info.size] = '\0'; - } - else if (up->udb_default[0] == '\0') - continue; - - /* we have a default case -- verify user:maildrop */ - key.data = keybuf; - key.size = keylen; - i = hes_udb_get(&key, &info); - if (i != 0 || info.size <= 0) - { - /* nope -- no aliasing for this user */ - continue; - } - - /* they exist -- build the actual address */ - i = strlen(user) + strlen(up->udb_default) + 2; - p = sm_rpool_malloc_x(rpool, i); - (void) sm_strlcpyn(p, i, 3, user, "@", up->udb_default); - if (tTd(28, 1)) - sm_dprintf("udbmatch ==> %s\n", p); - return p; - break; -# endif /* HESIOD */ - } - } - - /* still nothing.... too bad */ - return NULL; -} -/* -** UDB_MAP_LOOKUP -- look up arbitrary entry in user database map -** -** Parameters: -** map -- the map being queried. -** name -- the name to look up. -** av -- arguments to the map lookup. -** statp -- to get any error status. -** -** Returns: -** NULL if name not found in map. -** The rewritten name otherwise. -*/ - -/* ARGSUSED3 */ -char * -udb_map_lookup(map, name, av, statp) - MAP *map; - char *name; - char **av; - int *statp; -{ - char *val; - char *key; - char *SM_NONVOLATILE result = NULL; - char keybuf[MAXNAME + 1]; - - if (tTd(28, 20) || tTd(38, 20)) - sm_dprintf("udb_map_lookup(%s, %s)\n", map->map_mname, name); - - if (bitset(MF_NOFOLDCASE, map->map_mflags)) - { - key = name; - } - else - { - int keysize = strlen(name); - - if (keysize > sizeof(keybuf) - 1) - keysize = sizeof(keybuf) - 1; - memmove(keybuf, name, keysize); - keybuf[keysize] = '\0'; - makelower(keybuf); - key = keybuf; - } - val = udbmatch(key, map->map_file, NULL); - if (val == NULL) - return NULL; - SM_TRY - if (bitset(MF_MATCHONLY, map->map_mflags)) - result = map_rewrite(map, name, strlen(name), NULL); - else - result = map_rewrite(map, val, strlen(val), av); - SM_FINALLY - sm_free(val); - SM_END_TRY - return result; -} -/* -** _UDBX_INIT -- parse the UDB specification, opening any valid entries. -** -** Parameters: -** e -- the current envelope. -** -** Returns: -** EX_TEMPFAIL -- if it appeared it couldn't get hold of a -** database due to a host being down or some similar -** (recoverable) situation. -** EX_OK -- otherwise. -** -** Side Effects: -** Fills in the UdbEnts structure from UdbSpec. -*/ - -# define MAXUDBOPTS 27 - -static int -_udbx_init(e) - ENVELOPE *e; -{ - int ents = 0; - register char *p; - register struct udbent *up; - - if (UdbInitialized) - return EX_OK; - -# ifdef UDB_DEFAULT_SPEC - if (UdbSpec == NULL) - UdbSpec = UDB_DEFAULT_SPEC; -# endif /* UDB_DEFAULT_SPEC */ - - p = UdbSpec; - up = UdbEnts; - while (p != NULL) - { - char *spec; - int l; - struct udb_option opts[MAXUDBOPTS + 1]; - - while (*p == ' ' || *p == '\t' || *p == ',') - p++; - if (*p == '\0') - break; - spec = p; - p = strchr(p, ','); - if (p != NULL) - *p++ = '\0'; - - if (ents >= MAXUDBENT) - { - syserr("Maximum number of UDB entries exceeded"); - break; - } - - /* extract options */ - (void) _udb_parsespec(spec, opts, MAXUDBOPTS); - - /* - ** Decode database specification. - ** - ** In the sendmail tradition, the leading character - ** defines the semantics of the rest of the entry. - ** - ** @hostname -- forward email to the indicated host. - ** This should be the last in the list, - ** since it always matches the input. - ** /dbname -- search the named database on the local - ** host using the Berkeley db package. - ** Hesiod -- search the named database with BIND - ** using the MIT Hesiod package. - */ - - switch (*spec) - { - case '@': /* forward to remote host */ - up->udb_type = UDB_FORWARD; - up->udb_pid = CurrentPid; - up->udb_fwdhost = spec + 1; - ents++; - up++; - break; - -# if HESIOD - case 'h': /* use hesiod */ - case 'H': - if (sm_strcasecmp(spec, "hesiod") != 0) - goto badspec; - up->udb_type = UDB_HESIOD; - up->udb_pid = CurrentPid; - ents++; - up++; - break; -# endif /* HESIOD */ - -# if NEWDB - case '/': /* look up remote name */ - l = strlen(spec); - if (l > 3 && strcmp(&spec[l - 3], ".db") == 0) - { - up->udb_dbname = spec; - } - else - { - up->udb_dbname = sm_pmalloc_x(l + 4); - (void) sm_strlcpyn(up->udb_dbname, l + 4, 2, - spec, ".db"); - } - errno = 0; -# if DB_VERSION_MAJOR < 2 - up->udb_dbp = dbopen(up->udb_dbname, O_RDONLY, - 0644, DB_BTREE, NULL); -# else /* DB_VERSION_MAJOR < 2 */ - { - int flags = DB_RDONLY; -# if DB_VERSION_MAJOR > 2 - int ret; -# endif /* DB_VERSION_MAJOR > 2 */ - - SM_DB_FLAG_ADD(flags); - up->udb_dbp = NULL; -# if DB_VERSION_MAJOR > 2 - ret = db_create(&up->udb_dbp, NULL, 0); - if (ret != 0) - { - (void) up->udb_dbp->close(up->udb_dbp, - 0); - up->udb_dbp = NULL; - } - else - { - ret = up->udb_dbp->open(up->udb_dbp, - DBTXN - up->udb_dbname, - NULL, - DB_BTREE, - flags, - 0644); - if (ret != 0) - { -#ifdef DB_OLD_VERSION - if (ret == DB_OLD_VERSION) - ret = EINVAL; -#endif /* DB_OLD_VERSION */ - (void) up->udb_dbp->close(up->udb_dbp, 0); - up->udb_dbp = NULL; - } - } - errno = ret; -# else /* DB_VERSION_MAJOR > 2 */ - errno = db_open(up->udb_dbname, DB_BTREE, - flags, 0644, NULL, - NULL, &up->udb_dbp); -# endif /* DB_VERSION_MAJOR > 2 */ - } -# endif /* DB_VERSION_MAJOR < 2 */ - if (up->udb_dbp == NULL) - { - if (tTd(28, 1)) - { - int save_errno = errno; - -# if DB_VERSION_MAJOR < 2 - sm_dprintf("dbopen(%s): %s\n", -# else /* DB_VERSION_MAJOR < 2 */ - sm_dprintf("db_open(%s): %s\n", -# endif /* DB_VERSION_MAJOR < 2 */ - up->udb_dbname, - sm_errstring(errno)); - errno = save_errno; - } - if (errno != ENOENT && errno != EACCES) - { - if (LogLevel > 2) - sm_syslog(LOG_ERR, e->e_id, -# if DB_VERSION_MAJOR < 2 - "dbopen(%s): %s", -# else /* DB_VERSION_MAJOR < 2 */ - "db_open(%s): %s", -# endif /* DB_VERSION_MAJOR < 2 */ - up->udb_dbname, - sm_errstring(errno)); - up->udb_type = UDB_EOLIST; - if (up->udb_dbname != spec) - sm_free(up->udb_dbname); /* XXX */ - goto tempfail; - } - if (up->udb_dbname != spec) - sm_free(up->udb_dbname); /* XXX */ - break; - } - if (tTd(28, 1)) - { -# if DB_VERSION_MAJOR < 2 - sm_dprintf("_udbx_init: dbopen(%s)\n", -# else /* DB_VERSION_MAJOR < 2 */ - sm_dprintf("_udbx_init: db_open(%s)\n", -# endif /* DB_VERSION_MAJOR < 2 */ - up->udb_dbname); - } - up->udb_type = UDB_DBFETCH; - up->udb_pid = CurrentPid; - ents++; - up++; - break; -# endif /* NEWDB */ - - default: -# if HESIOD -badspec: -# endif /* HESIOD */ - syserr("Unknown UDB spec %s", spec); - break; - } - } - up->udb_type = UDB_EOLIST; - - if (tTd(28, 4)) - { - for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) - { - switch (up->udb_type) - { - case UDB_REMOTE: - sm_dprintf("REMOTE: addr %s, timeo %d\n", - anynet_ntoa((SOCKADDR *) &up->udb_addr), - up->udb_timeout); - break; - - case UDB_DBFETCH: -# if NEWDB - sm_dprintf("FETCH: file %s\n", - up->udb_dbname); -# else /* NEWDB */ - sm_dprintf("FETCH\n"); -# endif /* NEWDB */ - break; - - case UDB_FORWARD: - sm_dprintf("FORWARD: host %s\n", - up->udb_fwdhost); - break; - - case UDB_HESIOD: - sm_dprintf("HESIOD\n"); - break; - - default: - sm_dprintf("UNKNOWN\n"); - break; - } - } - } - - UdbInitialized = true; - errno = 0; - return EX_OK; - - /* - ** On temporary failure, back out anything we've already done - */ - - tempfail: -# if NEWDB - for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) - { - if (up->udb_type == UDB_DBFETCH) - { -# if DB_VERSION_MAJOR < 2 - (*up->udb_dbp->close)(up->udb_dbp); -# else /* DB_VERSION_MAJOR < 2 */ - errno = (*up->udb_dbp->close)(up->udb_dbp, 0); -# endif /* DB_VERSION_MAJOR < 2 */ - if (tTd(28, 1)) - sm_dprintf("_udbx_init: db->close(%s)\n", - up->udb_dbname); - } - } -# endif /* NEWDB */ - return EX_TEMPFAIL; -} - -static int -_udb_parsespec(udbspec, opt, maxopts) - char *udbspec; - struct udb_option opt[]; - int maxopts; -{ - register char *spec; - register char *spec_end; - register int optnum; - - spec_end = strchr(udbspec, ':'); - for (optnum = 0; optnum < maxopts && (spec = spec_end) != NULL; optnum++) - { - register char *p; - - while (isascii(*spec) && isspace(*spec)) - spec++; - spec_end = strchr(spec, ':'); - if (spec_end != NULL) - *spec_end++ = '\0'; - - opt[optnum].udbo_name = spec; - opt[optnum].udbo_val = NULL; - p = strchr(spec, '='); - if (p != NULL) - opt[optnum].udbo_val = ++p; - } - return optnum; -} -/* -** _UDBX_CLOSE -- close all file based UDB entries. -** -** Parameters: -** none -** -** Returns: -** none -*/ -void -_udbx_close() -{ - struct udbent *up; - - if (!UdbInitialized) - return; - - for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) - { - if (up->udb_pid != CurrentPid) - continue; - -# if NEWDB - if (up->udb_type == UDB_DBFETCH) - { -# if DB_VERSION_MAJOR < 2 - (*up->udb_dbp->close)(up->udb_dbp); -# else /* DB_VERSION_MAJOR < 2 */ - errno = (*up->udb_dbp->close)(up->udb_dbp, 0); -# endif /* DB_VERSION_MAJOR < 2 */ - } - if (tTd(28, 1)) - sm_dprintf("_udbx_init: db->close(%s)\n", - up->udb_dbname); -# endif /* NEWDB */ - } -} - -# if HESIOD - -static int -hes_udb_get(key, info) - DBT *key; - DBT *info; -{ - char *name, *type; - char **hp; - char kbuf[MAXUDBKEY + 1]; - - if (sm_strlcpy(kbuf, key->data, sizeof(kbuf)) >= sizeof(kbuf)) - return 0; - name = kbuf; - type = strrchr(name, ':'); - if (type == NULL) - return 1; - *type++ = '\0'; - if (strchr(name, '@') != NULL) - return 1; - - if (tTd(28, 1)) - sm_dprintf("hes_udb_get(%s, %s)\n", name, type); - - /* make the hesiod query */ -# ifdef HESIOD_INIT - if (HesiodContext == NULL && hesiod_init(&HesiodContext) != 0) - return -1; - hp = hesiod_resolve(HesiodContext, name, type); -# else /* HESIOD_INIT */ - hp = hes_resolve(name, type); -# endif /* HESIOD_INIT */ - *--type = ':'; -# ifdef HESIOD_INIT - if (hp == NULL) - return 1; - if (*hp == NULL) - { - hesiod_free_list(HesiodContext, hp); - if (errno == ECONNREFUSED || errno == EMSGSIZE) - return -1; - return 1; - } -# else /* HESIOD_INIT */ - if (hp == NULL || hp[0] == NULL) - { - /* network problem or timeout */ - if (hes_error() == HES_ER_NET) - return -1; - - return 1; - } -# endif /* HESIOD_INIT */ - else - { - /* - ** If there are multiple matches, just return the - ** first one. - ** - ** XXX These should really be returned; for example, - ** XXX it is legal for :maildrop to be multi-valued. - */ - - info->data = hp[0]; - info->size = (size_t) strlen(info->data); - } - - if (tTd(28, 80)) - sm_dprintf("hes_udb_get => %s\n", *hp); - - return 0; -} -# endif /* HESIOD */ - -#else /* USERDB */ - -int -udbexpand(a, sendq, aliaslevel, e) - ADDRESS *a; - ADDRESS **sendq; - int aliaslevel; - ENVELOPE *e; -{ - return EX_OK; -} - -#endif /* USERDB */ |
