static void cleanup_service(VSTREAM *src, char *unused_service, char **argv)
{
VSTRING *buf = vstring_alloc(100);
CLEANUP_STATE *state;
int flags;
int type = 0;
int status;
/*
* Sanity check. This service takes no command-line arguments.
*/
if (argv[0])
msg_fatal("unexpected command-line argument: %s", argv[0]);
/*
* Open a queue file and initialize state.
*/
state = cleanup_open(src);
/*
* Send the queue id to the client. Read client processing options. If we
* can't read the client processing options we can pretty much forget
* about the whole operation.
*/
attr_print(src, ATTR_FLAG_NONE,
ATTR_TYPE_STR, MAIL_ATTR_QUEUEID, state->queue_id,
ATTR_TYPE_END);
if (attr_scan(src, ATTR_FLAG_STRICT,
ATTR_TYPE_INT, MAIL_ATTR_FLAGS, &flags,
ATTR_TYPE_END) != 1) {
state->errs |= CLEANUP_STAT_BAD;
flags = 0;
}
cleanup_control(state, flags);
/*
* XXX Rely on the front-end programs to enforce record size limits.
*
* First, copy the envelope records to the queue file. Then, copy the
* message content (headers and body). Finally, attach any information
* extracted from message headers.
*/
while (CLEANUP_OUT_OK(state)) {
if ((type = rec_get_raw(src, buf, 0, REC_FLAG_NONE)) < 0) {
state->errs |= CLEANUP_STAT_BAD;
break;
}
if (REC_GET_HIDDEN_TYPE(type)) {
msg_warn("%s: record type %d not allowed - discarding this message",
state->queue_id, type);
state->errs |= CLEANUP_STAT_BAD;
break;
}
CLEANUP_RECORD(state, type, vstring_str(buf), VSTRING_LEN(buf));
if (type == REC_TYPE_END)
break;
}
/*
* Keep reading in case of problems, until the sender is ready to receive
* our status report.
*/
if (CLEANUP_OUT_OK(state) == 0 && type > 0) {
while (type != REC_TYPE_END
&& (type = rec_get(src, buf, 0)) > 0)
/* void */ ;
}
/*
* Log something to make timeout errors easier to debug.
*/
if (vstream_ftimeout(src))
msg_warn("%s: read timeout on %s",
state->queue_id, VSTREAM_PATH(src));
/*
* Finish this message, and report the result status to the client.
*/
status = cleanup_flush(state); /* in case state is modified */
attr_print(src, ATTR_FLAG_NONE,
ATTR_TYPE_INT, MAIL_ATTR_STATUS, status,
ATTR_TYPE_STR, MAIL_ATTR_WHY,
(state->flags & CLEANUP_FLAG_SMTP_REPLY)
&& state->smtp_reply ? state->smtp_reply :
state->reason ? state->reason : "",
ATTR_TYPE_END);
cleanup_free(state);
/*
* Cleanup.
*/
vstring_free(buf);
}
static void postcat(VSTREAM *fp, VSTRING *buffer, int flags)
{
int prev_type = 0;
int rec_type;
struct timeval tv;
time_t time;
int ch;
off_t offset;
const char *error_text;
char *attr_name;
char *attr_value;
int rec_flags = (msg_verbose ? REC_FLAG_NONE : REC_FLAG_DEFAULT);
int state; /* state machine, input type */
int do_print; /* state machine, output control */
long data_offset; /* state machine, read optimization */
long data_size; /* state machine, read optimization */
#define TEXT_RECORD(rec_type) \
(rec_type == REC_TYPE_CONT || rec_type == REC_TYPE_NORM)
/*
* See if this is a plausible file.
*/
if ((ch = VSTREAM_GETC(fp)) != VSTREAM_EOF) {
if (!strchr(REC_TYPE_ENVELOPE, ch)) {
msg_warn("%s: input is not a valid queue file", VSTREAM_PATH(fp));
return;
}
vstream_ungetc(fp, ch);
}
/*
* Other preliminaries.
*/
if (flags & PC_FLAG_PRINT_ENV)
vstream_printf("*** ENVELOPE RECORDS %s ***\n",
VSTREAM_PATH(fp));
state = PC_STATE_ENV;
do_print = (flags & PC_FLAG_PRINT_ENV);
data_offset = data_size = -1;
/*
* Now look at the rest.
*/
for (;;) {
if (flags & PC_FLAG_PRINT_OFFSET)
offset = vstream_ftell(fp);
rec_type = rec_get_raw(fp, buffer, 0, rec_flags);
if (rec_type == REC_TYPE_ERROR)
msg_fatal("record read error");
if (rec_type == REC_TYPE_EOF)
break;
/*
* First inspect records that have side effects on the (envelope,
* header, body) state machine or on the record reading order.
*
* XXX Comments marked "Optimization:" identify subtle code that will
* likely need to be revised when the queue file organization is
* changed.
*/
#define PRINT_MARKER(flags, fp, offset, type, text) do { \
if ((flags) & PC_FLAG_PRINT_OFFSET) \
vstream_printf("%9lu ", (unsigned long) (offset)); \
if (flags & PC_FLAG_PRINT_RTYPE_DEC) \
vstream_printf("%3d ", (type)); \
vstream_printf("*** %s %s ***\n", (text), VSTREAM_PATH(fp)); \
vstream_fflush(VSTREAM_OUT); \
} while (0)
#define PRINT_RECORD(flags, offset, type, value) do { \
if ((flags) & PC_FLAG_PRINT_OFFSET) \
vstream_printf("%9lu ", (unsigned long) (offset)); \
if (flags & PC_FLAG_PRINT_RTYPE_DEC) \
vstream_printf("%3d ", (type)); \
vstream_printf("%s: %s\n", rec_type_name(rec_type), (value)); \
vstream_fflush(VSTREAM_OUT); \
} while (0)
if (TEXT_RECORD(rec_type)) {
/* This is wrong when the message starts with whitespace. */
if (state == PC_STATE_HEADER && (flags & (PC_MASK_PRINT_TEXT))
&& prev_type != REC_TYPE_CONT && TEXT_RECORD(rec_type)
&& !(is_header(STR(buffer)) || IS_SPACE_TAB(STR(buffer)[0]))) {
/* Update the state machine. */
state = PC_STATE_BODY;
do_print = (flags & PC_FLAG_PRINT_BODY);
/* Optimization: terminate if nothing left to print. */
if (do_print == 0 && (flags & PC_FLAG_PRINT_ENV) == 0)
break;
/* Optimization: skip to extracted segment marker. */
if (do_print == 0 && (flags & PC_FLAG_PRINT_ENV)
&& data_offset >= 0 && data_size >= 0
&& vstream_fseek(fp, data_offset + data_size, SEEK_SET) < 0)
msg_fatal("seek error: %m");
}
/* Optional output happens further down below. */
} else if (rec_type == REC_TYPE_MESG) {
/* Sanity check. */
if (state != PC_STATE_ENV)
msg_warn("%s: out-of-order message content marker",
VSTREAM_PATH(fp));
/* Optional output. */
if (flags & PC_FLAG_PRINT_ENV)
PRINT_MARKER(flags, fp, offset, rec_type, "MESSAGE CONTENTS");
/* Optimization: skip to extracted segment marker. */
if ((flags & PC_MASK_PRINT_TEXT) == 0
&& data_offset >= 0 && data_size >= 0
&& vstream_fseek(fp, data_offset + data_size, SEEK_SET) < 0)
msg_fatal("seek error: %m");
/* Update the state machine, even when skipping. */
state = PC_STATE_HEADER;
do_print = (flags & PC_FLAG_PRINT_HEADER);
continue;
} else if (rec_type == REC_TYPE_XTRA) {
/* Sanity check. */
if (state != PC_STATE_HEADER && state != PC_STATE_BODY)
msg_warn("%s: out-of-order extracted segment marker",
VSTREAM_PATH(fp));
/* Optional output (terminate preceding header/body line). */
if (do_print && prev_type == REC_TYPE_CONT)
VSTREAM_PUTCHAR('\n');
if (flags & PC_FLAG_PRINT_ENV)
PRINT_MARKER(flags, fp, offset, rec_type, "HEADER EXTRACTED");
/* Update the state machine. */
state = PC_STATE_ENV;
do_print = (flags & PC_FLAG_PRINT_ENV);
/* Optimization: terminate if nothing left to print. */
if (do_print == 0)
break;
continue;
} else if (rec_type == REC_TYPE_END) {
/* Sanity check. */
if (state != PC_STATE_ENV)
msg_warn("%s: out-of-order message end marker",
VSTREAM_PATH(fp));
/* Optional output. */
if (flags & PC_FLAG_PRINT_ENV)
PRINT_MARKER(flags, fp, offset, rec_type, "MESSAGE FILE END");
/* Terminate the state machine. */
break;
} else if (rec_type == REC_TYPE_PTR) {
/* Optional output. */
/* This record type is exposed only with '-v'. */
if (do_print)
PRINT_RECORD(flags, offset, rec_type, STR(buffer));
/* Skip to the pointer's target record. */
if (rec_goto(fp, STR(buffer)) == REC_TYPE_ERROR)
msg_fatal("bad pointer record, or input is not seekable");
continue;
} else if (rec_type == REC_TYPE_SIZE) {
/* Optional output (here before we update the state machine). */
if (do_print)
PRINT_RECORD(flags, offset, rec_type, STR(buffer));
/* Read the message size/offset for the state machine optimizer. */
if (data_size >= 0 || data_offset >= 0) {
msg_warn("file contains multiple size records");
} else {
if (sscanf(STR(buffer), "%ld %ld", &data_size, &data_offset) != 2
|| data_offset <= 0 || data_size <= 0)
msg_fatal("invalid size record: %.100s", STR(buffer));
/* Optimization: skip to the message header. */
if ((flags & PC_FLAG_PRINT_ENV) == 0) {
if (vstream_fseek(fp, data_offset, SEEK_SET) < 0)
msg_fatal("seek error: %m");
/* Update the state machine. */
state = PC_STATE_HEADER;
do_print = (flags & PC_FLAG_PRINT_HEADER);
}
}
continue;
}
/*
* Don't inspect side-effect-free records that aren't printed.
*/
if (do_print == 0)
continue;
if (flags & PC_FLAG_PRINT_OFFSET)
vstream_printf("%9lu ", (unsigned long) offset);
if (flags & PC_FLAG_PRINT_RTYPE_DEC)
vstream_printf("%3d ", rec_type);
switch (rec_type) {
case REC_TYPE_TIME:
REC_TYPE_TIME_SCAN(STR(buffer), tv);
time = tv.tv_sec;
vstream_printf("%s: %s", rec_type_name(rec_type),
asctime(localtime(&time)));
break;
case REC_TYPE_WARN:
REC_TYPE_WARN_SCAN(STR(buffer), time);
vstream_printf("%s: %s", rec_type_name(rec_type),
asctime(localtime(&time)));
break;
case REC_TYPE_CONT: /* REC_TYPE_FILT collision */
if (state == PC_STATE_ENV)
vstream_printf("%s: ", rec_type_name(rec_type));
else if (msg_verbose)
vstream_printf("unterminated_text: ");
vstream_fwrite(VSTREAM_OUT, STR(buffer), LEN(buffer));
if (state == PC_STATE_ENV || msg_verbose
|| (flags & PC_FLAG_PRINT_OFFSET) != 0) {
rec_type = 0;
VSTREAM_PUTCHAR('\n');
}
break;
case REC_TYPE_NORM:
if (msg_verbose)
vstream_printf("%s: ", rec_type_name(rec_type));
vstream_fwrite(VSTREAM_OUT, STR(buffer), LEN(buffer));
VSTREAM_PUTCHAR('\n');
break;
case REC_TYPE_DTXT:
/* This record type is exposed only with '-v'. */
vstream_printf("%s: ", rec_type_name(rec_type));
vstream_fwrite(VSTREAM_OUT, STR(buffer), LEN(buffer));
VSTREAM_PUTCHAR('\n');
break;
case REC_TYPE_ATTR:
error_text = split_nameval(STR(buffer), &attr_name, &attr_value);
if (error_text != 0) {
msg_warn("%s: malformed attribute: %s: %.100s",
VSTREAM_PATH(fp), error_text, STR(buffer));
break;
}
if (strcmp(attr_name, MAIL_ATTR_CREATE_TIME) == 0) {
time = atol(attr_value);
vstream_printf("%s: %s", MAIL_ATTR_CREATE_TIME,
asctime(localtime(&time)));
} else {
vstream_printf("%s: %s=%s\n", rec_type_name(rec_type),
attr_name, attr_value);
}
break;
default:
vstream_printf("%s: %s\n", rec_type_name(rec_type), STR(buffer));
break;
}
prev_type = rec_type;
/*
* In case the next record is broken.
*/
vstream_fflush(VSTREAM_OUT);
}
}
static int qmgr_message_read(QMGR_MESSAGE *message)
{
VSTRING *buf;
int rec_type;
long curr_offset;
long save_offset = message->rcpt_offset; /* save a flag */
int save_unread = message->rcpt_unread; /* save a count */
char *start;
int recipient_limit;
const char *error_text;
char *name;
char *value;
char *orig_rcpt = 0;
int count;
int dsn_notify = 0;
char *dsn_orcpt = 0;
int n;
int have_log_client_attr = 0;
/*
* Initialize. No early returns or we have a memory leak.
*/
buf = vstring_alloc(100);
/*
* If we re-open this file, skip over on-file recipient records that we
* already looked at, and refill the in-core recipient address list.
*
* For the first time, the message recipient limit is calculated from the
* global recipient limit. This is to avoid reading little recipients
* when the active queue is near empty. When the queue becomes full, only
* the necessary amount is read in core. Such priming is necessary
* because there are no message jobs yet.
*
* For the next time, the recipient limit is based solely on the message
* jobs' positions in the job lists and/or job stacks.
*/
if (message->rcpt_offset) {
if (message->rcpt_list.len)
msg_panic("%s: recipient list not empty on recipient reload",
message->queue_id);
if (vstream_fseek(message->fp, message->rcpt_offset, SEEK_SET) < 0)
msg_fatal("seek file %s: %m", VSTREAM_PATH(message->fp));
message->rcpt_offset = 0;
recipient_limit = message->rcpt_limit - message->rcpt_count;
} else {
recipient_limit = var_qmgr_rcpt_limit - qmgr_recipient_count;
if (recipient_limit < message->rcpt_limit)
recipient_limit = message->rcpt_limit;
}
/* Keep interrupt latency in check. */
if (recipient_limit > 5000)
recipient_limit = 5000;
if (recipient_limit <= 0)
msg_panic("%s: no recipient slots available", message->queue_id);
if (msg_verbose)
msg_info("%s: recipient limit %d", message->queue_id, recipient_limit);
/*
* Read envelope records. XXX Rely on the front-end programs to enforce
* record size limits. Read up to recipient_limit recipients from the
* queue file, to protect against memory exhaustion. Recipient records
* may appear before or after the message content, so we keep reading
* from the queue file until we have enough recipients (rcpt_offset != 0)
* and until we know all the non-recipient information.
*
* Note that the total recipient count record is accurate only for fresh
* queue files. After some of the recipients are marked as done and the
* queue file is deferred, it can be used as upper bound estimate only.
* Fortunately, this poses no major problem on the scheduling algorithm,
* as the only impact is that the already deferred messages are not
* chosen by qmgr_job_candidate() as often as they could.
*
* On the first open, we must examine all non-recipient records.
*
* Optimization: when we know that recipient records are not mixed with
* non-recipient records, as is typical with mailing list mail, then we
* can avoid having to examine all the queue file records before we can
* start deliveries. This avoids some file system thrashing with huge
* mailing lists.
*/
for (;;) {
if ((curr_offset = vstream_ftell(message->fp)) < 0)
msg_fatal("vstream_ftell %s: %m", VSTREAM_PATH(message->fp));
if (curr_offset == message->data_offset && curr_offset > 0) {
if (vstream_fseek(message->fp, message->data_size, SEEK_CUR) < 0)
msg_fatal("seek file %s: %m", VSTREAM_PATH(message->fp));
curr_offset += message->data_size;
}
rec_type = rec_get_raw(message->fp, buf, 0, REC_FLAG_NONE);
start = vstring_str(buf);
if (msg_verbose > 1)
msg_info("record %c %s", rec_type, start);
if (rec_type == REC_TYPE_PTR) {
if ((rec_type = rec_goto(message->fp, start)) == REC_TYPE_ERROR)
break;
/* Need to update curr_offset after pointer jump. */
continue;
}
if (rec_type <= 0) {
msg_warn("%s: message rejected: missing end record",
message->queue_id);
break;
}
if (rec_type == REC_TYPE_END) {
message->rflags |= QMGR_READ_FLAG_SEEN_ALL_NON_RCPT;
break;
}
/*
* Map named attributes to pseudo record types, 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 (rec_type == REC_TYPE_ATTR) {
if ((error_text = split_nameval(start, &name, &value)) != 0) {
msg_warn("%s: ignoring bad attribute: %s: %.200s",
message->queue_id, error_text, start);
rec_type = REC_TYPE_ERROR;
break;
}
if ((n = rec_attr_map(name)) != 0) {
start = value;
rec_type = n;
}
}
/*
* Process recipient records.
*/
if (rec_type == REC_TYPE_RCPT) {
/* See also below for code setting orig_rcpt etc. */
if (message->rcpt_offset == 0) {
message->rcpt_unread--;
recipient_list_add(&message->rcpt_list, curr_offset,
dsn_orcpt ? dsn_orcpt : "",
dsn_notify ? dsn_notify : 0,
orig_rcpt ? orig_rcpt : "", start);
if (dsn_orcpt) {
myfree(dsn_orcpt);
dsn_orcpt = 0;
}
if (orig_rcpt) {
myfree(orig_rcpt);
orig_rcpt = 0;
}
if (dsn_notify)
dsn_notify = 0;
if (message->rcpt_list.len >= recipient_limit) {
if ((message->rcpt_offset = vstream_ftell(message->fp)) < 0)
msg_fatal("vstream_ftell %s: %m",
VSTREAM_PATH(message->fp));
if (message->rflags & QMGR_READ_FLAG_SEEN_ALL_NON_RCPT)
/* We already examined all non-recipient records. */
break;
if (message->rflags & QMGR_READ_FLAG_MIXED_RCPT_OTHER)
/* Examine all remaining non-recipient records. */
continue;
/* Optimizations for "pure recipient" record sections. */
if (curr_offset > message->data_offset) {
/* We already examined all non-recipient records. */
message->rflags |= QMGR_READ_FLAG_SEEN_ALL_NON_RCPT;
break;
}
/* Examine non-recipient records in extracted segment. */
if (vstream_fseek(message->fp, message->data_offset
+ message->data_size, SEEK_SET) < 0)
msg_fatal("seek file %s: %m", VSTREAM_PATH(message->fp));
continue;
}
}
continue;
}
if (rec_type == REC_TYPE_DONE || rec_type == REC_TYPE_DRCP) {
if (message->rcpt_offset == 0) {
message->rcpt_unread--;
if (dsn_orcpt) {
myfree(dsn_orcpt);
dsn_orcpt = 0;
}
if (orig_rcpt) {
myfree(orig_rcpt);
orig_rcpt = 0;
}
if (dsn_notify)
dsn_notify = 0;
}
continue;
}
if (rec_type == REC_TYPE_DSN_ORCPT) {
/* See also above for code clearing dsn_orcpt. */
if (dsn_orcpt != 0) {
msg_warn("%s: ignoring out-of-order DSN original recipient address <%.200s>",
message->queue_id, dsn_orcpt);
myfree(dsn_orcpt);
dsn_orcpt = 0;
}
if (message->rcpt_offset == 0)
dsn_orcpt = mystrdup(start);
continue;
}
if (rec_type == REC_TYPE_DSN_NOTIFY) {
/* See also above for code clearing dsn_notify. */
if (dsn_notify != 0) {
msg_warn("%s: ignoring out-of-order DSN notify flags <%d>",
message->queue_id, dsn_notify);
dsn_notify = 0;
}
if (message->rcpt_offset == 0) {
if (!alldig(start) || (n = atoi(start)) == 0 || !DSN_NOTIFY_OK(n))
msg_warn("%s: ignoring malformed DSN notify flags <%.200s>",
message->queue_id, start);
else
dsn_notify = n;
continue;
}
}
if (rec_type == REC_TYPE_ORCP) {
/* See also above for code clearing orig_rcpt. */
if (orig_rcpt != 0) {
msg_warn("%s: ignoring out-of-order original recipient <%.200s>",
message->queue_id, orig_rcpt);
myfree(orig_rcpt);
orig_rcpt = 0;
}
if (message->rcpt_offset == 0)
orig_rcpt = mystrdup(start);
continue;
}
/*
* Process non-recipient records.
*/
if (message->rflags & QMGR_READ_FLAG_SEEN_ALL_NON_RCPT)
/* We already examined all non-recipient records. */
continue;
if (rec_type == REC_TYPE_SIZE) {
if (message->data_offset == 0) {
if ((count = sscanf(start, "%ld %ld %d %d %ld %d",
&message->data_size, &message->data_offset,
&message->rcpt_unread, &message->rflags,
&message->cont_length,
&message->smtputf8)) >= 3) {
/* Postfix >= 1.0 (a.k.a. 20010228). */
if (message->data_offset <= 0 || message->data_size <= 0) {
msg_warn("%s: invalid size record: %.100s",
message->queue_id, start);
rec_type = REC_TYPE_ERROR;
break;
}
if (message->rflags & ~QMGR_READ_FLAG_USER) {
msg_warn("%s: invalid flags in size record: %.100s",
message->queue_id, start);
rec_type = REC_TYPE_ERROR;
break;
}
} else if (count == 1) {
/* Postfix < 1.0 (a.k.a. 20010228). */
qmgr_message_oldstyle_scan(message);
} else {
/* Can't happen. */
msg_warn("%s: message rejected: weird size record",
message->queue_id);
rec_type = REC_TYPE_ERROR;
break;
}
}
/* Postfix < 2.4 compatibility. */
if (message->cont_length == 0) {
message->cont_length = message->data_size;
} else if (message->cont_length < 0) {
msg_warn("%s: invalid size record: %.100s",
message->queue_id, start);
rec_type = REC_TYPE_ERROR;
break;
}
continue;
}
if (rec_type == REC_TYPE_TIME) {
if (message->arrival_time.tv_sec == 0)
REC_TYPE_TIME_SCAN(start, message->arrival_time);
continue;
}
if (rec_type == REC_TYPE_CTIME) {
if (message->create_time == 0)
message->create_time = atol(start);
continue;
}
if (rec_type == REC_TYPE_FILT) {
if (message->filter_xport != 0)
myfree(message->filter_xport);
message->filter_xport = mystrdup(start);
continue;
}
if (rec_type == REC_TYPE_INSP) {
if (message->inspect_xport != 0)
myfree(message->inspect_xport);
message->inspect_xport = mystrdup(start);
continue;
}
if (rec_type == REC_TYPE_RDR) {
if (message->redirect_addr != 0)
myfree(message->redirect_addr);
message->redirect_addr = mystrdup(start);
continue;
}
if (rec_type == REC_TYPE_FROM) {
if (message->sender == 0) {
message->sender = mystrdup(start);
opened(message->queue_id, message->sender,
message->cont_length, message->rcpt_unread,
"queue %s", message->queue_name);
}
continue;
}
if (rec_type == REC_TYPE_DSN_ENVID) {
if (message->dsn_envid == 0)
message->dsn_envid = mystrdup(start);
}
if (rec_type == REC_TYPE_DSN_RET) {
if (message->dsn_ret == 0) {
if (!alldig(start) || (n = atoi(start)) == 0 || !DSN_RET_OK(n))
msg_warn("%s: ignoring malformed DSN RET flags in queue file record:%.100s",
message->queue_id, start);
else
message->dsn_ret = n;
}
}
if (rec_type == REC_TYPE_ATTR) {
/* Allow extra segment to override envelope segment info. */
if (strcmp(name, MAIL_ATTR_ENCODING) == 0) {
if (message->encoding != 0)
myfree(message->encoding);
message->encoding = mystrdup(value);
}
/*
* Backwards compatibility. Before Postfix 2.3, the logging
* attributes were called client_name, etc. Now they are called
* log_client_name. etc., and client_name is used for the actual
* client information. To support old queue files we accept both
* names for the purpose of logging; the new name overrides the
* old one.
*
* XXX Do not use the "legacy" client_name etc. attribute values for
* initializing the logging attributes, when this file already
* contains the "modern" log_client_name etc. logging attributes.
* Otherwise, logging attributes that are not present in the
* queue file would be set with information from the real client.
*/
else if (strcmp(name, MAIL_ATTR_ACT_CLIENT_NAME) == 0) {
if (have_log_client_attr == 0 && message->client_name == 0)
message->client_name = mystrdup(value);
} else if (strcmp(name, MAIL_ATTR_ACT_CLIENT_ADDR) == 0) {
if (have_log_client_attr == 0 && message->client_addr == 0)
message->client_addr = mystrdup(value);
} else if (strcmp(name, MAIL_ATTR_ACT_CLIENT_PORT) == 0) {
if (have_log_client_attr == 0 && message->client_port == 0)
message->client_port = mystrdup(value);
} else if (strcmp(name, MAIL_ATTR_ACT_PROTO_NAME) == 0) {
if (have_log_client_attr == 0 && message->client_proto == 0)
message->client_proto = mystrdup(value);
} else if (strcmp(name, MAIL_ATTR_ACT_HELO_NAME) == 0) {
if (have_log_client_attr == 0 && message->client_helo == 0)
message->client_helo = mystrdup(value);
}
/* Original client attributes. */
else if (strcmp(name, MAIL_ATTR_LOG_CLIENT_NAME) == 0) {
if (message->client_name != 0)
myfree(message->client_name);
message->client_name = mystrdup(value);
have_log_client_attr = 1;
} else if (strcmp(name, MAIL_ATTR_LOG_CLIENT_ADDR) == 0) {
if (message->client_addr != 0)
myfree(message->client_addr);
message->client_addr = mystrdup(value);
have_log_client_attr = 1;
} else if (strcmp(name, MAIL_ATTR_LOG_CLIENT_PORT) == 0) {
if (message->client_port != 0)
myfree(message->client_port);
message->client_port = mystrdup(value);
have_log_client_attr = 1;
} else if (strcmp(name, MAIL_ATTR_LOG_PROTO_NAME) == 0) {
if (message->client_proto != 0)
myfree(message->client_proto);
message->client_proto = mystrdup(value);
have_log_client_attr = 1;
} else if (strcmp(name, MAIL_ATTR_LOG_HELO_NAME) == 0) {
if (message->client_helo != 0)
myfree(message->client_helo);
message->client_helo = mystrdup(value);
have_log_client_attr = 1;
} else if (strcmp(name, MAIL_ATTR_SASL_METHOD) == 0) {
if (message->sasl_method == 0)
message->sasl_method = mystrdup(value);
else
msg_warn("%s: ignoring multiple %s attribute: %s",
message->queue_id, MAIL_ATTR_SASL_METHOD, value);
} else if (strcmp(name, MAIL_ATTR_SASL_USERNAME) == 0) {
if (message->sasl_username == 0)
message->sasl_username = mystrdup(value);
else
msg_warn("%s: ignoring multiple %s attribute: %s",
message->queue_id, MAIL_ATTR_SASL_USERNAME, value);
} else if (strcmp(name, MAIL_ATTR_SASL_SENDER) == 0) {
if (message->sasl_sender == 0)
message->sasl_sender = mystrdup(value);
else
msg_warn("%s: ignoring multiple %s attribute: %s",
message->queue_id, MAIL_ATTR_SASL_SENDER, value);
} else if (strcmp(name, MAIL_ATTR_LOG_IDENT) == 0) {
if (message->log_ident == 0)
message->log_ident = mystrdup(value);
else
msg_warn("%s: ignoring multiple %s attribute: %s",
message->queue_id, MAIL_ATTR_LOG_IDENT, value);
} else if (strcmp(name, MAIL_ATTR_RWR_CONTEXT) == 0) {
if (message->rewrite_context == 0)
message->rewrite_context = mystrdup(value);
else
msg_warn("%s: ignoring multiple %s attribute: %s",
message->queue_id, MAIL_ATTR_RWR_CONTEXT, value);
}
/*
* Optional tracing flags (verify, sendmail -v, sendmail -bv).
* This record is killed after a trace logfile report is sent and
* after the logfile is deleted.
*/
else if (strcmp(name, MAIL_ATTR_TRACE_FLAGS) == 0) {
message->tflags = DEL_REQ_TRACE_FLAGS(atoi(value));
if (message->tflags == DEL_REQ_FLAG_RECORD)
message->tflags_offset = curr_offset;
else
message->tflags_offset = 0;
}
continue;
}
if (rec_type == REC_TYPE_WARN) {
if (message->warn_offset == 0) {
message->warn_offset = curr_offset;
REC_TYPE_WARN_SCAN(start, message->warn_time);
}
continue;
}
if (rec_type == REC_TYPE_VERP) {
if (message->verp_delims == 0) {
if (message->sender == 0 || message->sender[0] == 0) {
msg_warn("%s: ignoring VERP request for null sender",
message->queue_id);
} else if (verp_delims_verify(start) != 0) {
msg_warn("%s: ignoring bad VERP request: \"%.100s\"",
message->queue_id, start);
} else {
if (msg_verbose)
msg_info("%s: enabling VERP for sender \"%.100s\"",
message->queue_id, message->sender);
message->single_rcpt = 1;
message->verp_delims = mystrdup(start);
}
}
continue;
}
}
/*
* Grr.
*/
if (dsn_orcpt != 0) {
if (rec_type > 0)
msg_warn("%s: ignoring out-of-order DSN original recipient <%.200s>",
message->queue_id, dsn_orcpt);
myfree(dsn_orcpt);
}
if (orig_rcpt != 0) {
if (rec_type > 0)
msg_warn("%s: ignoring out-of-order original recipient <%.200s>",
message->queue_id, orig_rcpt);
myfree(orig_rcpt);
}
/*
* After sending a "delayed" warning, request sender notification when
* message delivery is completed. While "mail delayed" notifications are
* bad enough because they multiply the amount of email traffic, "delay
* cleared" notifications are even worse because they come in a sudden
* burst when the queue drains after a network outage.
*/
if (var_dsn_delay_cleared && message->warn_time < 0)
message->tflags |= DEL_REQ_FLAG_REC_DLY_SENT;
/*
* Remember when we have read the last recipient batch. Note that we do
* it here after reading as reading might have used considerable amount
* of time.
*/
message->refill_time = sane_time();
/*
* Avoid clumsiness elsewhere in the program. When sending data across an
* IPC channel, sending an empty string is more convenient than sending a
* null pointer.
*/
if (message->dsn_envid == 0)
message->dsn_envid = mystrdup("");
if (message->encoding == 0)
message->encoding = mystrdup(MAIL_ATTR_ENC_NONE);
if (message->client_name == 0)
message->client_name = mystrdup("");
if (message->client_addr == 0)
message->client_addr = mystrdup("");
if (message->client_port == 0)
message->client_port = mystrdup("");
if (message->client_proto == 0)
message->client_proto = mystrdup("");
if (message->client_helo == 0)
message->client_helo = mystrdup("");
if (message->sasl_method == 0)
message->sasl_method = mystrdup("");
if (message->sasl_username == 0)
message->sasl_username = mystrdup("");
if (message->sasl_sender == 0)
message->sasl_sender = mystrdup("");
if (message->log_ident == 0)
message->log_ident = mystrdup("");
if (message->rewrite_context == 0)
message->rewrite_context = mystrdup(MAIL_ATTR_RWR_LOCAL);
/* Postfix < 2.3 compatibility. */
if (message->create_time == 0)
message->create_time = message->arrival_time.tv_sec;
/*
* Clean up.
*/
vstring_free(buf);
/*
* Sanity checks. Verify that all required information was found,
* including the queue file end marker.
*/
if (message->rcpt_unread < 0
|| (message->rcpt_offset == 0 && message->rcpt_unread != 0)) {
msg_warn("%s: rcpt count mismatch (%d)",
message->queue_id, message->rcpt_unread);
message->rcpt_unread = 0;
}
if (rec_type <= 0) {
/* Already logged warning. */
} else if (message->arrival_time.tv_sec == 0) {
msg_warn("%s: message rejected: missing arrival time record",
message->queue_id);
} else if (message->sender == 0) {
msg_warn("%s: message rejected: missing sender record",
message->queue_id);
} else if (message->data_offset == 0) {
msg_warn("%s: message rejected: missing size record",
message->queue_id);
} else {
return (0);
}
message->rcpt_offset = save_offset; /* restore flag */
message->rcpt_unread = save_unread; /* restore count */
recipient_list_free(&message->rcpt_list);
recipient_list_init(&message->rcpt_list, RCPT_LIST_INIT_QUEUE);
return (-1);
}
int main(int argc, char **argv)
{
struct stat st;
int fd;
int c;
VSTRING *buf;
int status;
MAIL_STREAM *dst;
int rec_type;
static char *segment_info[] = {
REC_TYPE_POST_ENVELOPE, REC_TYPE_POST_CONTENT, REC_TYPE_POST_EXTRACT, ""
};
char **expected;
uid_t uid = getuid();
ARGV *import_env;
const char *error_text;
char *attr_name;
char *attr_value;
const char *errstr;
char *junk;
struct timeval start;
int saved_errno;
int from_count = 0;
int rcpt_count = 0;
int validate_input = 1;
/*
* Fingerprint executables and core dumps.
*/
MAIL_VERSION_STAMP_ALLOCATE;
/*
* Be consistent with file permissions.
*/
umask(022);
/*
* To minimize confusion, make sure that the standard file descriptors
* are open before opening anything else. XXX Work around for 44BSD where
* fstat can return EBADF on an open file descriptor.
*/
for (fd = 0; fd < 3; fd++)
if (fstat(fd, &st) == -1
&& (close(fd), open("/dev/null", O_RDWR, 0)) != fd)
msg_fatal("open /dev/null: %m");
/*
* Set up logging. Censor the process name: it is provided by the user.
*/
argv[0] = "postdrop";
msg_vstream_init(argv[0], VSTREAM_ERR);
msg_syslog_init(mail_task("postdrop"), LOG_PID, LOG_FACILITY);
set_mail_conf_str(VAR_PROCNAME, var_procname = mystrdup(argv[0]));
/*
* Check the Postfix library version as soon as we enable logging.
*/
MAIL_VERSION_CHECK;
/*
* Parse JCL. This program is set-gid and must sanitize all command-line
* arguments. The configuration directory argument is validated by the
* mail configuration read routine. Don't do complex things until we have
* completed initializations.
*/
while ((c = GETOPT(argc, argv, "c:rv")) > 0) {
switch (c) {
case 'c':
if (setenv(CONF_ENV_PATH, optarg, 1) < 0)
msg_fatal("out of memory");
break;
case 'r': /* forward compatibility */
break;
case 'v':
if (geteuid() == 0)
msg_verbose++;
break;
default:
msg_fatal("usage: %s [-c config_dir] [-v]", argv[0]);
}
}
/*
* Read the global configuration file and extract configuration
* information. Some claim that the user should supply the working
* directory instead. That might be OK, given that this command needs
* write permission in a subdirectory called "maildrop". However we still
* need to reliably detect incomplete input, and so we must perform
* record-level I/O. With that, we should also take the opportunity to
* perform some sanity checks on the input.
*/
mail_conf_read();
/* Re-evaluate mail_task() after reading main.cf. */
msg_syslog_init(mail_task("postdrop"), LOG_PID, LOG_FACILITY);
get_mail_conf_str_table(str_table);
/*
* Mail submission access control. Should this be in the user-land gate,
* or in the daemon process?
*/
mail_dict_init();
if ((errstr = check_user_acl_byuid(VAR_SUBMIT_ACL, var_submit_acl,
uid)) != 0)
msg_fatal("User %s(%ld) is not allowed to submit mail",
errstr, (long) uid);
/*
* Stop run-away process accidents by limiting the queue file size. This
* is not a defense against DOS attack.
*/
if (var_message_limit > 0 && get_file_limit() > var_message_limit)
set_file_limit((off_t) var_message_limit);
/*
* This program is installed with setgid privileges. Strip the process
* environment so that we don't have to trust the C library.
*/
import_env = mail_parm_split(VAR_IMPORT_ENVIRON, var_import_environ);
clean_env(import_env->argv);
argv_free(import_env);
if (chdir(var_queue_dir))
msg_fatal("chdir %s: %m", var_queue_dir);
if (msg_verbose)
msg_info("chdir %s", var_queue_dir);
/*
* Set up signal handlers and a runtime error handler so that we can
* clean up incomplete output.
*
* postdrop_sig() uses the in-kernel SIGINT handler address as an atomic
* variable to prevent nested postdrop_sig() calls. For this reason, the
* SIGINT handler must be configured before other signal handlers are
* allowed to invoke postdrop_sig().
*/
signal(SIGPIPE, SIG_IGN);
signal(SIGXFSZ, SIG_IGN);
signal(SIGINT, postdrop_sig);
signal(SIGQUIT, postdrop_sig);
if (signal(SIGTERM, SIG_IGN) == SIG_DFL)
signal(SIGTERM, postdrop_sig);
if (signal(SIGHUP, SIG_IGN) == SIG_DFL)
signal(SIGHUP, postdrop_sig);
msg_cleanup(postdrop_cleanup);
/* End of initializations. */
/*
* Don't trust the caller's time information.
*/
GETTIMEOFDAY(&start);
/*
* Create queue file. mail_stream_file() never fails. Send the queue ID
* to the caller. Stash away a copy of the queue file name so we can
* clean up in case of a fatal error or an interrupt.
*/
dst = mail_stream_file(MAIL_QUEUE_MAILDROP, MAIL_CLASS_PUBLIC,
var_pickup_service, 0444);
attr_print(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_STR(MAIL_ATTR_QUEUEID, dst->id),
ATTR_TYPE_END);
vstream_fflush(VSTREAM_OUT);
postdrop_path = mystrdup(VSTREAM_PATH(dst->stream));
/*
* Copy stdin to file. The format is checked so that we can recognize
* incomplete input and cancel the operation. With the sanity checks
* applied here, the pickup daemon could skip format checks and pass a
* file descriptor to the cleanup daemon. These are by no means all
* sanity checks - the cleanup service and queue manager services will
* reject messages that lack required information.
*
* If something goes wrong, slurp up the input before responding to the
* client, otherwise the client will give up after detecting SIGPIPE.
*
* Allow attribute records if the attribute specifies the MIME body type
* (sendmail -B).
*/
vstream_control(VSTREAM_IN, CA_VSTREAM_CTL_PATH("stdin"), CA_VSTREAM_CTL_END);
buf = vstring_alloc(100);
expected = segment_info;
/* Override time information from the untrusted caller. */
rec_fprintf(dst->stream, REC_TYPE_TIME, REC_TYPE_TIME_FORMAT,
REC_TYPE_TIME_ARG(start));
for (;;) {
/* Don't allow PTR records. */
rec_type = rec_get_raw(VSTREAM_IN, buf, var_line_limit, REC_FLAG_NONE);
if (rec_type == REC_TYPE_EOF) { /* request cancelled */
mail_stream_cleanup(dst);
if (remove(postdrop_path))
msg_warn("uid=%ld: remove %s: %m", (long) uid, postdrop_path);
else if (msg_verbose)
msg_info("remove %s", postdrop_path);
myfree(postdrop_path);
postdrop_path = 0;
exit(0);
}
if (rec_type == REC_TYPE_ERROR)
msg_fatal("uid=%ld: malformed input", (long) uid);
if (strchr(*expected, rec_type) == 0)
msg_fatal("uid=%ld: unexpected record type: %d", (long) uid, rec_type);
if (rec_type == **expected)
expected++;
/* Override time information from the untrusted caller. */
if (rec_type == REC_TYPE_TIME)
continue;
/* Check these at submission time instead of pickup time. */
if (rec_type == REC_TYPE_FROM)
from_count++;
if (rec_type == REC_TYPE_RCPT)
rcpt_count++;
/* Limit the attribute types that users may specify. */
if (rec_type == REC_TYPE_ATTR) {
if ((error_text = split_nameval(vstring_str(buf), &attr_name,
&attr_value)) != 0) {
msg_warn("uid=%ld: ignoring malformed record: %s: %.200s",
(long) uid, error_text, vstring_str(buf));
continue;
}
#define STREQ(x,y) (strcmp(x,y) == 0)
if ((STREQ(attr_name, MAIL_ATTR_ENCODING)
&& (STREQ(attr_value, MAIL_ATTR_ENC_7BIT)
|| STREQ(attr_value, MAIL_ATTR_ENC_8BIT)
|| STREQ(attr_value, MAIL_ATTR_ENC_NONE)))
|| STREQ(attr_name, MAIL_ATTR_DSN_ENVID)
|| STREQ(attr_name, MAIL_ATTR_DSN_NOTIFY)
|| rec_attr_map(attr_name)
|| (STREQ(attr_name, MAIL_ATTR_RWR_CONTEXT)
&& (STREQ(attr_value, MAIL_ATTR_RWR_LOCAL)
|| STREQ(attr_value, MAIL_ATTR_RWR_REMOTE)))
|| STREQ(attr_name, MAIL_ATTR_TRACE_FLAGS)) { /* XXX */
rec_fprintf(dst->stream, REC_TYPE_ATTR, "%s=%s",
attr_name, attr_value);
} else {
msg_warn("uid=%ld: ignoring attribute record: %.200s=%.200s",
(long) uid, attr_name, attr_value);
}
continue;
}
if (REC_PUT_BUF(dst->stream, rec_type, buf) < 0) {
/* rec_get() errors must not clobber errno. */
saved_errno = errno;
while ((rec_type = rec_get_raw(VSTREAM_IN, buf, var_line_limit,
REC_FLAG_NONE)) != REC_TYPE_END
&& rec_type != REC_TYPE_EOF)
if (rec_type == REC_TYPE_ERROR)
msg_fatal("uid=%ld: malformed input", (long) uid);
validate_input = 0;
errno = saved_errno;
break;
}
if (rec_type == REC_TYPE_END)
break;
}
vstring_free(buf);
/*
* As of Postfix 2.7 the pickup daemon discards mail without recipients.
* Such mail may enter the maildrop queue when "postsuper -r" is invoked
* before the queue manager deletes an already delivered message. Looking
* at file ownership is not a good way to make decisions on what mail to
* discard. Instead, the pickup server now requires that new submissions
* always have at least one recipient record.
*
* The Postfix sendmail command already rejects mail without recipients.
* However, in the future postdrop may receive mail via other programs,
* so we add a redundant recipient check here for future proofing.
*
* The test for the sender address is just for consistency of error
* reporting (report at submission time instead of pickup time). Besides
* the segment terminator records, there aren't any other mandatory
* records in a Postfix submission queue file.
*/
if (validate_input && (from_count == 0 || rcpt_count == 0)) {
status = CLEANUP_STAT_BAD;
mail_stream_cleanup(dst);
}
/*
* Finish the file.
*/
else if ((status = mail_stream_finish(dst, (VSTRING *) 0)) != 0) {
msg_warn("uid=%ld: %m", (long) uid);
postdrop_cleanup();
}
/*
* Disable deletion on fatal error before reporting success, so the file
* will not be deleted after we have taken responsibility for delivery.
*/
if (postdrop_path) {
junk = postdrop_path;
postdrop_path = 0;
myfree(junk);
}
/*
* Send the completion status to the caller and terminate.
*/
attr_print(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_INT(MAIL_ATTR_STATUS, status),
SEND_ATTR_STR(MAIL_ATTR_WHY, ""),
ATTR_TYPE_END);
vstream_fflush(VSTREAM_OUT);
exit(status);
}
