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Fix ITS#2335, properly parse multiple CLDAP responses in a single datagram

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for both RFC1798 and MS CLDAP.
This commit is contained in:
Howard Chu 2003-02-28 12:57:28 +00:00
parent 2c98342192
commit 387a76934b
1 changed files with 85 additions and 3 deletions
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88
libraries/libldap/result.c
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@ -413,6 +413,9 @@ try_read1msg(
BerElement tmpber;
int rc, refer_cnt, hadref, simple_request;
ber_int_t lderr;
#ifdef LDAP_CONNECTIONLESS
int firstmsg = 1, moremsgs = 0, isv2 = 0;
#endif
/*
* v3ref = flag for V3 referral / search reference
* 0 = not a ref, 1 = sucessfully chased ref, -1 = pass ref to application
@ -446,7 +449,9 @@ retry:
if ( LDAP_IS_UDP(ld) ) {
struct sockaddr from;
ber_int_sb_read(sb, &from, sizeof(struct sockaddr));
if (ld->ld_options.ldo_version == LDAP_VERSION2) isv2=1;
}
nextresp3:
#endif
tag = ber_get_next( sb, &len, ber );
if ( tag == LDAP_TAG_MESSAGE ) {
@ -515,9 +520,8 @@ retry_ber:
goto retry_ber;
}
#ifdef LDAP_CONNECTIONLESS
if (LDAP_IS_UDP(ld) && ld->ld_options.ldo_version == LDAP_VERSION2) {
struct berval blank;
ber_scanf(ber, "m{", &blank);
if (LDAP_IS_UDP(ld) && isv2) {
ber_scanf(ber, "x{");
}
#endif
/* the message type */
@ -821,6 +825,84 @@ lr->lr_res_matched ? lr->lr_res_matched : "" );
new->lm_msgtype = tag;
new->lm_ber = ber;
#ifdef LDAP_CONNECTIONLESS
/* CLDAP replies all fit in a single datagram. In LDAPv2 RFC1798
* the responses are all a sequence wrapped in one message. In
* LDAPv3 each response is in its own message. The datagram must
* end with a SearchResult. We can't just parse each response in
* separate calls to try_read1msg because the header info is only
* present at the beginning of the datagram, not at the beginning
* of each response. So parse all the responses at once and queue
* them up, then pull off the first response to return to the
* caller when all parsing is complete.
*/
if ( LDAP_IS_UDP(ld) ) {
/* If not a result, look for more */
if ( tag != LDAP_RES_SEARCH_RESULT ) {
int ok = 0;
moremsgs = 1;
if (isv2) {
/* LDAPv2: dup the current ber, skip past the current
* response, and see if there are any more after it.
*/
ber = ber_dup( ber );
ber_scanf( ber, "x" );
if (ber_peek_tag(ber, &len) != LBER_DEFAULT) {
/* There's more - dup the ber buffer so they can all be
* individually freed by ldap_msgfree.
*/
struct berval bv;
ber_get_option(ber, LBER_OPT_BER_REMAINING_BYTES, &len);
bv.bv_val = LDAP_MALLOC(len);
if (bv.bv_val) {
ok=1;
ber_read(ber, bv.bv_val, len);
bv.bv_len = len;
ber_init2(ber, &bv, ld->ld_lberoptions );
}
}
} else {
/* LDAPv3: Just allocate a new ber. Since this is a buffered
* datagram, if the sockbuf is readable we still have data
* to parse.
*/
ber = ldap_alloc_ber_with_options(ld);
if (ber_sockbuf_ctrl(sb, LBER_SB_OPT_DATA_READY, NULL)) ok=1;
}
/* set up response chain */
if ( firstmsg ) {
firstmsg = 0;
new->lm_next = ld->ld_responses;
ld->ld_responses = new;
} else {
tmp->lm_chain = new;
}
tmp = new;
/* "ok" means there's more to parse */
if (ok) {
if (isv2) goto nextresp2;
else goto nextresp3;
} else {
/* got to end of datagram without a SearchResult. Free
* our dup'd ber, but leave any buffer alone. For v2 case,
* the previous response is still using this buffer. For v3,
* the new ber has no buffer to free yet.
*/
ber_free(ber, 0);
return -1;
}
} else if ( moremsgs ) {
/* got search result, and we had multiple responses in 1 datagram.
* stick the result onto the end of the chain, and then pull the
* first response off the head of the chain.
*/
tmp->lm_chain = new;
*result = chkResponseList( ld, msgid, all );
ld->ld_errno = LDAP_SUCCESS;
return( (*result)->lm_msgtype );
}
}
#endif
/* is this the one we're looking for? */
if ( msgid == LDAP_RES_ANY || id == msgid ) {