Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 502 insertions, 0 deletions

diff --git a/src/cleanup/cleanup_envelope.c b/src/cleanup/cleanup_envelope.c
new file mode 100644
index 0000000..a4b991d
--- /dev/null
+++ b/src/cleanup/cleanup_envelope.c
@@ -0,0 +1,502 @@
+/*++
+/* NAME
+/*	cleanup_envelope 3
+/* SUMMARY
+/*	process envelope segment
+/* SYNOPSIS
+/*	#include <cleanup.h>
+/*
+/*	void	cleanup_envelope(state, type, buf, len)
+/*	CLEANUP_STATE *state;
+/*	int	type;
+/*	const char *buf;
+/*	ssize_t	len;
+/* DESCRIPTION
+/*	This module processes envelope records and writes the result
+/*	to the queue file.  It validates the message structure, rewrites
+/*	sender/recipient addresses to canonical form, and expands recipients
+/*	according to entries in the virtual table. This routine absorbs but
+/*	does not emit the envelope to content boundary record.
+/*
+/*	Arguments:
+/* .IP state
+/*	Queue file and message processing state. This state is updated
+/*	as records are processed and as errors happen.
+/* .IP type
+/*	Record type.
+/* .IP buf
+/*	Record content.
+/* .IP len
+/*	Record content length.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>			/* ssscanf() */
+#include <ctype.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <mymalloc.h>
+#include <stringops.h>
+#include <nvtable.h>
+
+/* Global library. */
+
+#include <record.h>
+#include <rec_type.h>
+#include <cleanup_user.h>
+#include <qmgr_user.h>
+#include <mail_params.h>
+#include <verp_sender.h>
+#include <mail_proto.h>
+#include <dsn_mask.h>
+#include <rec_attr_map.h>
+#include <smtputf8.h>
+#include <deliver_request.h>
+
+/* Application-specific. */
+
+#include "cleanup.h"
+
+#define STR	vstring_str
+#define STREQ(x,y) (strcmp((x), (y)) == 0)
+
+static void cleanup_envelope_process(CLEANUP_STATE *, int, const char *, ssize_t);
+
+/* cleanup_envelope - initialize message envelope */
+
+void    cleanup_envelope(CLEANUP_STATE *state, int type,
+			         const char *str, ssize_t len)
+{
+
+    /*
+     * The message size and count record goes first, so it can easily be
+     * updated in place. This information takes precedence over any size
+     * estimate provided by the client. It's all in one record, data size
+     * first, for backwards compatibility reasons.
+     */
+    cleanup_out_format(state, REC_TYPE_SIZE, REC_TYPE_SIZE_FORMAT,
+		       (REC_TYPE_SIZE_CAST1) 0,	/* extra offs - content offs */
+		       (REC_TYPE_SIZE_CAST2) 0,	/* content offset */
+		       (REC_TYPE_SIZE_CAST3) 0,	/* recipient count */
+		       (REC_TYPE_SIZE_CAST4) 0,	/* qmgr options */
+		       (REC_TYPE_SIZE_CAST5) 0,	/* content length */
+		       (REC_TYPE_SIZE_CAST6) 0);	/* smtputf8 */
+
+    /*
+     * Pass control to the actual envelope processing routine.
+     */
+    state->action = cleanup_envelope_process;
+    cleanup_envelope_process(state, type, str, len);
+}
+
+/* cleanup_envelope_process - process one envelope record */
+
+static void cleanup_envelope_process(CLEANUP_STATE *state, int type,
+				             const char *buf, ssize_t len)
+{
+    const char *myname = "cleanup_envelope_process";
+    char   *attr_name;
+    char   *attr_value;
+    const char *error_text;
+    int     extra_opts;
+    int     junk;
+    int     mapped_type = type;
+    const char *mapped_buf = buf;
+    int     milter_count;
+
+#ifdef DELAY_ACTION
+    int     defer_delay;
+
+#endif
+
+    if (msg_verbose)
+	msg_info("initial envelope %c %.*s", type, (int) len, buf);
+
+    if (type == REC_TYPE_FLGS) {
+	/* Not part of queue file format. */
+	extra_opts = atoi(buf);
+	if (extra_opts & ~CLEANUP_FLAG_MASK_EXTRA)
+	    msg_warn("%s: ignoring bad extra flags: 0x%x",
+		     state->queue_id, extra_opts);
+	else
+	    state->flags |= extra_opts;
+	return;
+    }
+#ifdef DELAY_ACTION
+    if (type == REC_TYPE_DELAY) {
+	/* Not part of queue file format. */
+	defer_delay = atoi(buf);
+	if (defer_delay <= 0)
+	    msg_warn("%s: ignoring bad delay time: %s", state->queue_id, buf);
+	else
+	    state->defer_delay = defer_delay;
+	return;
+    }
+#endif
+
+    /*
+     * XXX We instantiate a MILTERS structure even when the filter count is
+     * zero (for example, all filters are in ACCEPT state, or the SMTP server
+     * sends a dummy MILTERS structure without any filters), otherwise the
+     * cleanup server would apply the non_smtpd_milters setting
+     * inappropriately.
+     */
+    if (type == REC_TYPE_MILT_COUNT) {
+	/* Not part of queue file format. */
+	if ((milter_count = atoi(buf)) >= 0)
+	    cleanup_milter_receive(state, milter_count);
+	return;
+    }
+
+    /*
+     * Map DSN attribute name to pseudo record type so that we don't have to
+     * pollute the queue file with records that are incompatible with past
+     * Postfix versions. Preferably, people should be able to back out from
+     * an upgrade without losing mail.
+     */
+    if (type == REC_TYPE_ATTR) {
+	vstring_strcpy(state->attr_buf, buf);
+	error_text = split_nameval(STR(state->attr_buf), &attr_name, &attr_value);
+	if (error_text != 0) {
+	    msg_warn("%s: message rejected: malformed attribute: %s: %.100s",
+		     state->queue_id, error_text, buf);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	/* Zero-length values are place holders for unavailable values. */
+	if (*attr_value == 0) {
+	    msg_warn("%s: spurious null attribute value for \"%s\" -- ignored",
+		     state->queue_id, attr_name);
+	    return;
+	}
+	if ((junk = rec_attr_map(attr_name)) != 0) {
+	    mapped_buf = attr_value;
+	    mapped_type = junk;
+	}
+    }
+
+    /*
+     * Sanity check.
+     */
+    if (strchr(REC_TYPE_ENVELOPE, type) == 0) {
+	msg_warn("%s: message rejected: unexpected record type %d in envelope",
+		 state->queue_id, type);
+	state->errs |= CLEANUP_STAT_BAD;
+	return;
+    }
+
+    /*
+     * Although recipient records appear at the end of the initial or
+     * extracted envelope, the code for processing recipient records is first
+     * because there can be lots of them.
+     * 
+     * Recipient records may be mixed with other information (such as FILTER or
+     * REDIRECT actions from SMTPD). In that case the queue manager needs to
+     * examine all queue file records before it can start delivery. This is
+     * not a problem when SMTPD recipient lists are small.
+     * 
+     * However, if recipient records are not mixed with other records
+     * (typically, mailing list mail) then we can make an optimization: the
+     * queue manager does not need to examine every envelope record before it
+     * can start deliveries. This can help with very large mailing lists.
+     */
+
+    /*
+     * On the transition from non-recipient records to recipient records,
+     * emit some records and do some sanity checks.
+     * 
+     * XXX Moving the envelope sender (and the test for its presence) to the
+     * extracted segment can reduce qmqpd memory requirements because it no
+     * longer needs to read the entire message into main memory.
+     */
+    if ((state->flags & CLEANUP_FLAG_INRCPT) == 0
+	&& strchr(REC_TYPE_ENV_RECIPIENT, type) != 0) {
+	if (state->sender == 0) {
+	    msg_warn("%s: message rejected: missing sender envelope record",
+		     state->queue_id);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	if (state->arrival_time.tv_sec == 0) {
+	    msg_warn("%s: message rejected: missing time envelope record",
+		     state->queue_id);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+
+	/*
+	 * XXX This works by accident, because the sender is recorded at the
+	 * beginning of the envelope segment.
+	 */
+	if ((state->flags & CLEANUP_FLAG_WARN_SEEN) == 0
+	    && state->sender && *state->sender
+	    && var_delay_warn_time > 0) {
+	    cleanup_out_format(state, REC_TYPE_WARN, REC_TYPE_WARN_FORMAT,
+			       REC_TYPE_WARN_ARG(state->arrival_time.tv_sec
+						 + var_delay_warn_time));
+	}
+	state->flags |= CLEANUP_FLAG_INRCPT;
+    }
+
+    /*
+     * Initial envelope recipient record processing.
+     */
+    if (type == REC_TYPE_RCPT) {
+	if (state->sender == 0) {		/* protect showq */
+	    msg_warn("%s: message rejected: envelope recipient precedes sender",
+		     state->queue_id);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	if (state->orig_rcpt == 0)
+	    state->orig_rcpt = mystrdup(buf);
+	cleanup_addr_recipient(state, buf);
+	if (cleanup_milters != 0
+	    && state->milters == 0
+	    && CLEANUP_MILTER_OK(state))
+	    cleanup_milter_emul_rcpt(state, cleanup_milters, state->recip);
+	myfree(state->orig_rcpt);
+	state->orig_rcpt = 0;
+	if (state->dsn_orcpt != 0) {
+	    myfree(state->dsn_orcpt);
+	    state->dsn_orcpt = 0;
+	}
+	state->dsn_notify = 0;
+	return;
+    }
+    if (type == REC_TYPE_DONE || type == REC_TYPE_DRCP) {
+	if (state->orig_rcpt != 0) {
+	    myfree(state->orig_rcpt);
+	    state->orig_rcpt = 0;
+	}
+	if (state->dsn_orcpt != 0) {
+	    myfree(state->dsn_orcpt);
+	    state->dsn_orcpt = 0;
+	}
+	state->dsn_notify = 0;
+	return;
+    }
+    if (mapped_type == REC_TYPE_DSN_ORCPT) {
+	if (state->dsn_orcpt) {
+	    msg_warn("%s: ignoring out-of-order DSN original recipient record <%.200s>",
+		     state->queue_id, state->dsn_orcpt);
+	    myfree(state->dsn_orcpt);
+	}
+	state->dsn_orcpt = mystrdup(mapped_buf);
+	return;
+    }
+    if (mapped_type == REC_TYPE_DSN_NOTIFY) {
+	if (state->dsn_notify) {
+	    msg_warn("%s: ignoring out-of-order DSN notify record <%d>",
+		     state->queue_id, state->dsn_notify);
+	    state->dsn_notify = 0;
+	}
+	if (!alldig(mapped_buf) || (junk = atoi(mapped_buf)) == 0
+	    || DSN_NOTIFY_OK(junk) == 0)
+	    msg_warn("%s: ignoring malformed DSN notify record <%.200s>",
+		     state->queue_id, buf);
+	else
+	    state->qmgr_opts |=
+		QMGR_READ_FLAG_FROM_DSN(state->dsn_notify = junk);
+	return;
+    }
+    if (type == REC_TYPE_ORCP) {
+	if (state->orig_rcpt != 0) {
+	    msg_warn("%s: ignoring out-of-order original recipient record <%.200s>",
+		     state->queue_id, state->orig_rcpt);
+	    myfree(state->orig_rcpt);
+	}
+	state->orig_rcpt = mystrdup(buf);
+	return;
+    }
+    if (type == REC_TYPE_MESG) {
+	state->action = cleanup_message;
+	if (state->flags & CLEANUP_FLAG_INRCPT) {
+	    if (state->milters || cleanup_milters) {
+		/* Make room to append recipient. */
+		if ((state->append_rcpt_pt_offset = vstream_ftell(state->dst)) < 0)
+		    msg_fatal("%s: vstream_ftell %s: %m:", myname, cleanup_path);
+		cleanup_out_format(state, REC_TYPE_PTR, REC_TYPE_PTR_FORMAT, 0L);
+		if ((state->append_rcpt_pt_target = vstream_ftell(state->dst)) < 0)
+		    msg_fatal("%s: vstream_ftell %s: %m:", myname, cleanup_path);
+	    }
+	    state->flags &= ~CLEANUP_FLAG_INRCPT;
+	}
+	return;
+    }
+
+    /*
+     * Initial envelope non-recipient record processing.
+     * 
+     * If the message was requeued with "postsuper -r" use their
+     * SMTPUTF8_REQUESTED flag.
+     */
+    if (state->flags & CLEANUP_FLAG_INRCPT)
+	/* Tell qmgr that recipient records are mixed with other information. */
+	state->qmgr_opts |= QMGR_READ_FLAG_MIXED_RCPT_OTHER;
+    if (type == REC_TYPE_SIZE) {
+	/* Use our own SIZE record, except for the SMTPUTF8_REQUESTED flag. */
+	(void) sscanf(buf, "%*s $*s %*s %*s %*s %d", &state->smtputf8);
+	state->smtputf8 &= SMTPUTF8_FLAG_REQUESTED;
+	return;
+    }
+    if (mapped_type == REC_TYPE_CTIME)
+	/* Use our own expiration time base record instead. */
+	return;
+    if (type == REC_TYPE_TIME) {
+	/* First instance wins. */
+	if (state->arrival_time.tv_sec == 0) {
+	    REC_TYPE_TIME_SCAN(buf, state->arrival_time);
+	    cleanup_out(state, type, buf, len);
+	}
+	/* Generate our own expiration time base record. */
+	cleanup_out_format(state, REC_TYPE_ATTR, "%s=%ld",
+			   MAIL_ATTR_CREATE_TIME, (long) time((time_t *) 0));
+	return;
+    }
+    if (type == REC_TYPE_FULL) {
+	/* First instance wins. */
+	if (state->fullname == 0) {
+	    state->fullname = mystrdup(buf);
+	    cleanup_out(state, type, buf, len);
+	}
+	return;
+    }
+    if (type == REC_TYPE_FROM) {
+	off_t after_sender_offs;
+
+	/* Allow only one instance. */
+	if (state->sender != 0) {
+	    msg_warn("%s: message rejected: multiple envelope sender records",
+		     state->queue_id);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	if (state->milters || cleanup_milters) {
+	    /* Remember the sender record offset. */
+	    if ((state->sender_pt_offset = vstream_ftell(state->dst)) < 0)
+		msg_fatal("%s: vstream_ftell %s: %m:", myname, cleanup_path);
+	}
+	after_sender_offs = cleanup_addr_sender(state, buf);
+	if (state->milters || cleanup_milters) {
+	    /* Remember the after-sender record offset. */
+	    state->sender_pt_target = after_sender_offs;
+	}
+	if (cleanup_milters != 0
+	    && state->milters == 0
+	    && CLEANUP_MILTER_OK(state))
+	    cleanup_milter_emul_mail(state, cleanup_milters, state->sender);
+	return;
+    }
+    if (mapped_type == REC_TYPE_DSN_ENVID) {
+	/* Don't break "postsuper -r" after Milter overrides ENVID. */
+	if (!allprint(mapped_buf)) {
+	    msg_warn("%s: message rejected: bad DSN envelope ID record",
+		     state->queue_id);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	if (state->dsn_envid != 0)
+	    myfree(state->dsn_envid);
+	state->dsn_envid = mystrdup(mapped_buf);
+	cleanup_out(state, type, buf, len);
+	return;
+    }
+    if (mapped_type == REC_TYPE_DSN_RET) {
+	/* Don't break "postsuper -r" after Milter overrides RET. */
+	if (!alldig(mapped_buf) || (junk = atoi(mapped_buf)) == 0
+	    || DSN_RET_OK(junk) == 0) {
+	    msg_warn("%s: message rejected: bad DSN RET record <%.200s>",
+		     state->queue_id, buf);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	state->dsn_ret = junk;
+	cleanup_out(state, type, buf, len);
+	return;
+    }
+    if (type == REC_TYPE_WARN) {
+	/* First instance wins. */
+	if ((state->flags & CLEANUP_FLAG_WARN_SEEN) == 0) {
+	    state->flags |= CLEANUP_FLAG_WARN_SEEN;
+	    cleanup_out(state, type, buf, len);
+	}
+	return;
+    }
+    /* XXX Needed for cleanup_bounce(); sanity check usage. */
+    if (type == REC_TYPE_VERP) {
+	if (state->verp_delims == 0) {
+	    if (state->sender == 0 || state->sender[0] == 0) {
+		msg_warn("%s: ignoring VERP request for null sender",
+			 state->queue_id);
+	    } else if (verp_delims_verify(buf) != 0) {
+		msg_warn("%s: ignoring bad VERP request: \"%.100s\"",
+			 state->queue_id, buf);
+	    } else {
+		state->verp_delims = mystrdup(buf);
+		cleanup_out(state, type, buf, len);
+	    }
+	}
+	return;
+    }
+    if (type == REC_TYPE_ATTR) {
+	if (state->attr->used >= var_qattr_count_limit) {
+	    msg_warn("%s: message rejected: attribute count exceeds limit %d",
+		     state->queue_id, var_qattr_count_limit);
+	    state->errs |= CLEANUP_STAT_BAD;
+	    return;
+	}
+	if (strcmp(attr_name, MAIL_ATTR_RWR_CONTEXT) == 0) {
+	    /* Choose header rewriting context. See also cleanup_addr.c. */
+	    if (STREQ(attr_value, MAIL_ATTR_RWR_LOCAL)) {
+		state->hdr_rewrite_context = MAIL_ATTR_RWR_LOCAL;
+	    } else if (STREQ(attr_value, MAIL_ATTR_RWR_REMOTE)) {
+		state->hdr_rewrite_context =
+		    (*var_remote_rwr_domain ? MAIL_ATTR_RWR_REMOTE : 0);
+	    } else {
+		msg_warn("%s: message rejected: bad rewriting context: %.100s",
+			 state->queue_id, attr_value);
+		state->errs |= CLEANUP_STAT_BAD;
+		return;
+	    }
+	}
+	if (strcmp(attr_name, MAIL_ATTR_TRACE_FLAGS) == 0) {
+	    if (!alldig(attr_value)) {
+		msg_warn("%s: message rejected: bad TFLAG record <%.200s>",
+			 state->queue_id, buf);
+		state->errs |= CLEANUP_STAT_BAD;
+		return;
+	    }
+	    if (state->tflags == 0)
+		state->tflags = DEL_REQ_TRACE_FLAGS(atoi(attr_value));
+	}
+	nvtable_update(state->attr, attr_name, attr_value);
+	cleanup_out(state, type, buf, len);
+	return;
+    } else {
+	cleanup_out(state, type, buf, len);
+	return;
+    }
+}