-/* $Cambridge: exim/src/src/transport.c,v 1.3 2005/01/04 10:00:42 ph10 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2005 */
+/* Copyright (c) University of Cambridge 1995 - 2016 */
/* See the file NOTICE for conditions of use and distribution. */
/* General functions concerned with transportation, and generic options for all
#include "exim.h"
+#ifdef HAVE_LINUX_SENDFILE
+#include <sys/sendfile.h>
+#endif
/* Structure for keeping list of addresses that have been added to
Envelope-To:, in order to avoid duplication. */
(void *)offsetof(transport_instance, driver_name) },
{ "envelope_to_add", opt_bool|opt_public,
(void *)(offsetof(transport_instance, envelope_to_add)) },
+#ifndef DISABLE_EVENT
+ { "event_action", opt_stringptr | opt_public,
+ (void *)offsetof(transport_instance, event_action) },
+#endif
{ "group", opt_expand_gid|opt_public,
(void *)offsetof(transport_instance, gid) },
- { "headers_add", opt_stringptr|opt_public,
+ { "headers_add", opt_stringptr|opt_public|opt_rep_str,
(void *)offsetof(transport_instance, add_headers) },
{ "headers_only", opt_bool|opt_public,
(void *)offsetof(transport_instance, headers_only) },
- { "headers_remove", opt_stringptr|opt_public,
+ { "headers_remove", opt_stringptr|opt_public|opt_rep_str,
(void *)offsetof(transport_instance, remove_headers) },
{ "headers_rewrite", opt_rewrite|opt_public,
(void *)offsetof(transport_instance, headers_rewrite) },
(void *)offsetof(transport_instance, home_dir) },
{ "initgroups", opt_bool|opt_public,
(void *)offsetof(transport_instance, initgroups) },
+ { "max_parallel", opt_stringptr|opt_public,
+ (void *)offsetof(transport_instance, max_parallel) },
{ "message_size_limit", opt_stringptr|opt_public,
(void *)offsetof(transport_instance, message_size_limit) },
{ "rcpt_include_affixes", opt_bool|opt_public,
transport_write_block(int fd, uschar *block, int len)
{
int i, rc, save_errno;
+int local_timeout = transport_write_timeout;
+
+/* This loop is for handling incomplete writes and other retries. In most
+normal cases, it is only ever executed once. */
for (i = 0; i < 100; i++)
{
DEBUG(D_transport)
debug_printf("writing data block fd=%d size=%d timeout=%d\n",
- fd, len, transport_write_timeout);
- if (transport_write_timeout > 0) alarm(transport_write_timeout);
+ fd, len, local_timeout);
- #ifdef SUPPORT_TLS
- if (tls_active == fd) rc = tls_write(block, len); else
- #endif
+ /* This code makes use of alarm() in order to implement the timeout. This
+ isn't a very tidy way of doing things. Using non-blocking I/O with select()
+ provides a neater approach. However, I don't know how to do this when TLS is
+ in use. */
- rc = write(fd, block, len);
- save_errno = errno;
+ if (transport_write_timeout <= 0) /* No timeout wanted */
+ {
+ #ifdef SUPPORT_TLS
+ if (tls_out.active == fd) rc = tls_write(FALSE, block, len); else
+ #endif
+ rc = write(fd, block, len);
+ save_errno = errno;
+ }
- /* Cancel the alarm and deal with a timeout */
+ /* Timeout wanted. */
- if (transport_write_timeout > 0)
+ else
{
- alarm(0);
+ alarm(local_timeout);
+#ifdef SUPPORT_TLS
+ if (tls_out.active == fd)
+ rc = tls_write(FALSE, block, len);
+ else
+#endif
+ rc = write(fd, block, len);
+ save_errno = errno;
+ local_timeout = alarm(0);
if (sigalrm_seen)
{
errno = ETIMEDOUT;
if (rc == len) { transport_count += len; return TRUE; }
- /* A non-negative return code is an incomplete write. Try again. */
+ /* A non-negative return code is an incomplete write. Try again for the rest
+ of the block. If we have exactly hit the timeout, give up. */
if (rc >= 0)
{
block += rc;
transport_count += rc;
DEBUG(D_transport) debug_printf("write incomplete (%d)\n", rc);
- continue;
+ goto CHECK_TIMEOUT; /* A few lines below */
}
/* A negative return code with an EINTR error is another form of
{
DEBUG(D_transport)
debug_printf("write interrupted before anything written\n");
- continue;
+ goto CHECK_TIMEOUT; /* A few lines below */
}
/* A response of EAGAIN from write() is likely only in the case of writing
DEBUG(D_transport)
debug_printf("write temporarily locked out, waiting 1 sec\n");
sleep(1);
+
+ /* Before continuing to try another write, check that we haven't run out of
+ time. */
+
+ CHECK_TIMEOUT:
+ if (transport_write_timeout > 0 && local_timeout <= 0)
+ {
+ errno = ETIMEDOUT;
+ return FALSE;
+ }
continue;
}
*/
BOOL
-transport_write_string(int fd, char *format, ...)
+transport_write_string(int fd, const char *format, ...)
{
va_list ap;
va_start(ap, format);
fd file descript to write to
chunk pointer to data to write
len length of data to write
- usr_crlf TRUE if CR LF is wanted at the end of each line
+ tctx transport context - processing to be done during output
In addition, the static nl_xxx variables must be set as required.
*/
static BOOL
-write_chunk(int fd, uschar *chunk, int len, BOOL use_crlf)
+write_chunk(int fd, transport_ctx * tctx, uschar *chunk, int len)
{
uschar *start = chunk;
uschar *end = chunk + len;
-register uschar *ptr;
+uschar *ptr;
int mlen = DELIVER_OUT_BUFFER_SIZE - nl_escape_length - 2;
/* The assumption is made that the check string will never stretch over move
for (ptr = start; ptr < end; ptr++)
{
- register int ch;
+ int ch, len;
/* Flush the buffer if it has reached the threshold - we want to leave enough
room for the next uschar, plus a possible extra CR for an LF, plus the escape
string. */
- if (chunk_ptr - deliver_out_buffer > mlen)
+ if ((len = chunk_ptr - deliver_out_buffer) > mlen)
{
- if (!transport_write_block(fd, deliver_out_buffer,
- chunk_ptr - deliver_out_buffer))
+ /* If CHUNKING, prefix with BDAT (size) NON-LAST. Also, reap responses
+ from previous SMTP commands. */
+
+ if (tctx && tctx->options & topt_use_bdat && tctx->chunk_cb)
+ if (tctx->chunk_cb(fd, tctx, (unsigned)len, tc_reap_prev|tc_reap_one) != OK)
+ return FALSE;
+
+ if (!transport_write_block(fd, deliver_out_buffer, len))
return FALSE;
chunk_ptr = deliver_out_buffer;
}
/* Insert CR before NL if required */
- if (use_crlf) *chunk_ptr++ = '\r';
+ if (tctx && tctx->options & topt_use_crlf) *chunk_ptr++ = '\r';
*chunk_ptr++ = '\n';
+ transport_newlines++;
/* The check_string test (formerly "from hack") replaces the specific
string at the start of a line with an escape string (e.g. "From " becomes
pdlist address of anchor of the list of processed addresses
first TRUE if this is the first address; set it FALSE afterwards
fd the file descriptor to write to
- use_crlf to be passed on to write_chunk()
+ tctx transport context - processing to be done during output
Returns: FALSE if writing failed
*/
static BOOL
write_env_to(address_item *p, struct aci **pplist, struct aci **pdlist,
- BOOL *first, int fd, BOOL use_crlf)
+ BOOL *first, int fd, transport_ctx * tctx)
{
address_item *pp;
struct aci *ppp;
/* Do nothing if we have already handled this address. If not, remember it
so that we don't handle it again. */
-for (ppp = *pdlist; ppp != NULL; ppp = ppp->next)
- { if (p == ppp->ptr) return TRUE; }
+for (ppp = *pdlist; ppp; ppp = ppp->next) if (p == ppp->ptr) return TRUE;
ppp = store_get(sizeof(struct aci));
ppp->next = *pdlist;
for (pp = p;; pp = pp->parent)
{
address_item *dup;
- for (dup = addr_duplicate; dup != NULL; dup = dup->next)
- {
- if (dup->dupof != pp) continue; /* Not a dup of our address */
- if (!write_env_to(dup, pplist, pdlist, first, fd, use_crlf)) return FALSE;
- }
- if (pp->parent == NULL) break;
+ for (dup = addr_duplicate; dup; dup = dup->next)
+ if (dup->dupof == pp) /* a dup of our address */
+ if (!write_env_to(dup, pplist, pdlist, first, fd, tctx))
+ return FALSE;
+ if (!pp->parent) break;
}
/* Check to see if we have already output the progenitor. */
-for (ppp = *pplist; ppp != NULL; ppp = ppp->next)
- { if (pp == ppp->ptr) break; }
-if (ppp != NULL) return TRUE;
+for (ppp = *pplist; ppp; ppp = ppp->next) if (pp == ppp->ptr) break;
+if (ppp) return TRUE;
/* Remember what we have output, and output it. */
*pplist = ppp;
ppp->ptr = pp;
-if (!(*first) && !write_chunk(fd, US",\n ", 3, use_crlf)) return FALSE;
+if (!*first && !write_chunk(fd, tctx, US",\n ", 3)) return FALSE;
*first = FALSE;
-return write_chunk(fd, pp->address, Ustrlen(pp->address), use_crlf);
+return write_chunk(fd, tctx, pp->address, Ustrlen(pp->address));
}
+/* Add/remove/rewwrite headers, and send them plus the empty-line sparator.
+
+Globals:
+ header_list
+
+Arguments:
+ addr (chain of) addresses (for extra headers), or NULL;
+ only the first address is used
+ fd file descriptor to write the message to
+ sendfn function for output (transport or verify)
+ wck_flags
+ use_crlf turn NL into CR LF
+ use_bdat callback before chunk flush
+ rewrite_rules chain of header rewriting rules
+ rewrite_existflags flags for the rewriting rules
+ chunk_cb transport callback function for data-chunk commands
+
+Returns: TRUE on success; FALSE on failure.
+*/
+BOOL
+transport_headers_send(int fd, transport_ctx * tctx,
+ BOOL (*sendfn)(int fd, transport_ctx * tctx, uschar * s, int len))
+{
+header_line *h;
+const uschar *list;
+transport_instance * tblock = tctx ? tctx->tblock : NULL;
+address_item * addr = tctx ? tctx->addr : NULL;
+
+/* Then the message's headers. Don't write any that are flagged as "old";
+that means they were rewritten, or are a record of envelope rewriting, or
+were removed (e.g. Bcc). If remove_headers is not null, skip any headers that
+match any entries therein. It is a colon-sep list; expand the items
+separately and squash any empty ones.
+Then check addr->prop.remove_headers too, provided that addr is not NULL. */
+
+for (h = header_list; h; h = h->next) if (h->type != htype_old)
+ {
+ int i;
+ BOOL include_header = TRUE;
+
+ list = tblock ? tblock->remove_headers : NULL;
+ for (i = 0; i < 2; i++) /* For remove_headers && addr->prop.remove_headers */
+ {
+ if (list)
+ {
+ int sep = ':'; /* This is specified as a colon-separated list */
+ uschar *s, *ss;
+ while ((s = string_nextinlist(&list, &sep, NULL, 0)))
+ {
+ int len;
+
+ if (i == 0)
+ if (!(s = expand_string(s)) && !expand_string_forcedfail)
+ {
+ errno = ERRNO_CHHEADER_FAIL;
+ return FALSE;
+ }
+ len = s ? Ustrlen(s) : 0;
+ if (strncmpic(h->text, s, len) != 0) continue;
+ ss = h->text + len;
+ while (*ss == ' ' || *ss == '\t') ss++;
+ if (*ss == ':') break;
+ }
+ if (s) { include_header = FALSE; break; }
+ }
+ if (addr) list = addr->prop.remove_headers;
+ }
+
+ /* If this header is to be output, try to rewrite it if there are rewriting
+ rules. */
+
+ if (include_header)
+ {
+ if (tblock && tblock->rewrite_rules)
+ {
+ void *reset_point = store_get(0);
+ header_line *hh;
+
+ if ((hh = rewrite_header(h, NULL, NULL, tblock->rewrite_rules,
+ tblock->rewrite_existflags, FALSE)))
+ {
+ if (!sendfn(fd, tctx, hh->text, hh->slen)) return FALSE;
+ store_reset(reset_point);
+ continue; /* With the next header line */
+ }
+ }
+
+ /* Either no rewriting rules, or it didn't get rewritten */
+
+ if (!sendfn(fd, tctx, h->text, h->slen)) return FALSE;
+ }
+
+ /* Header removed */
+
+ else
+ {
+ DEBUG(D_transport) debug_printf("removed header line:\n%s---\n", h->text);
+ }
+ }
+
+/* Add on any address-specific headers. If there are multiple addresses,
+they will all have the same headers in order to be batched. The headers
+are chained in reverse order of adding (so several addresses from the
+same alias might share some of them) but we want to output them in the
+opposite order. This is a bit tedious, but there shouldn't be very many
+of them. We just walk the list twice, reversing the pointers each time,
+but on the second time, write out the items.
+
+Headers added to an address by a router are guaranteed to end with a newline.
+*/
+
+if (addr)
+ {
+ int i;
+ header_line *hprev = addr->prop.extra_headers;
+ header_line *hnext;
+ for (i = 0; i < 2; i++)
+ for (h = hprev, hprev = NULL; h; h = hnext)
+ {
+ hnext = h->next;
+ h->next = hprev;
+ hprev = h;
+ if (i == 1)
+ {
+ if (!sendfn(fd, tctx, h->text, h->slen)) return FALSE;
+ DEBUG(D_transport)
+ debug_printf("added header line(s):\n%s---\n", h->text);
+ }
+ }
+ }
+
+/* If a string containing additional headers exists it is a newline-sep
+list. Expand each item and write out the result. This is done last so that
+if it (deliberately or accidentally) isn't in header format, it won't mess
+up any other headers. An empty string or a forced expansion failure are
+noops. An added header string from a transport may not end with a newline;
+add one if it does not. */
+
+if (tblock && (list = CUS tblock->add_headers))
+ {
+ int sep = '\n';
+ uschar * s;
+
+ while ((s = string_nextinlist(&list, &sep, NULL, 0)))
+ if ((s = expand_string(s)))
+ {
+ int len = Ustrlen(s);
+ if (len > 0)
+ {
+ if (!sendfn(fd, tctx, s, len)) return FALSE;
+ if (s[len-1] != '\n' && !sendfn(fd, tctx, US"\n", 1))
+ return FALSE;
+ DEBUG(D_transport)
+ {
+ debug_printf("added header line:\n%s", s);
+ if (s[len-1] != '\n') debug_printf("\n");
+ debug_printf("---\n");
+ }
+ }
+ }
+ else if (!expand_string_forcedfail)
+ { errno = ERRNO_CHHEADER_FAIL; return FALSE; }
+ }
+
+/* Separate headers from body with a blank line */
+
+return sendfn(fd, tctx, US"\n", 1);
+}
+
+
/*************************************************
* Write the message *
*************************************************/
transport_write_timeout non-zero.
Arguments:
- addr (chain of) addresses (for extra headers), or NULL;
- only the first address is used
fd file descriptor to write the message to
- options bit-wise options:
- add_return_path if TRUE, add a "return-path" header
- add_envelope_to if TRUE, add a "envelope-to" header
- add_delivery_date if TRUE, add a "delivery-date" header
- use_crlf if TRUE, turn NL into CR LF
- end_dot if TRUE, send a terminating "." line at the end
- no_headers if TRUE, omit the headers
- no_body if TRUE, omit the body
- size_limit if > 0, this is a limit to the size of message written;
- it is used when returning messages to their senders,
- and is approximate rather than exact, owing to chunk
- buffering
- add_headers a string containing one or more headers to add; it is
- expanded, and must be in correct RFC 822 format as
- it is transmitted verbatim; NULL => no additions,
- and so does empty string or forced expansion fail
- remove_headers a colon-separated list of headers to remove, or NULL
- check_string a string to check for at the start of lines, or NULL
- escape_string a string to insert in front of any check string
- rewrite_rules chain of header rewriting rules
- rewrite_existflags flags for the rewriting rules
+ tctx
+ addr (chain of) addresses (for extra headers), or NULL;
+ only the first address is used
+ tblock optional transport instance block (NULL signifies NULL/0):
+ add_headers a string containing one or more headers to add; it is
+ expanded, and must be in correct RFC 822 format as
+ it is transmitted verbatim; NULL => no additions,
+ and so does empty string or forced expansion fail
+ remove_headers a colon-separated list of headers to remove, or NULL
+ rewrite_rules chain of header rewriting rules
+ rewrite_existflags flags for the rewriting rules
+ options bit-wise options:
+ add_return_path if TRUE, add a "return-path" header
+ add_envelope_to if TRUE, add a "envelope-to" header
+ add_delivery_date if TRUE, add a "delivery-date" header
+ use_crlf if TRUE, turn NL into CR LF
+ end_dot if TRUE, send a terminating "." line at the end
+ no_headers if TRUE, omit the headers
+ no_body if TRUE, omit the body
+ check_string a string to check for at the start of lines, or NULL
+ escape_string a string to insert in front of any check string
+ size_limit if > 0, this is a limit to the size of message written;
+ it is used when returning messages to their senders,
+ and is approximate rather than exact, owing to chunk
+ buffering
Returns: TRUE on success; FALSE (with errno) on failure.
In addition, the global variable transport_count
*/
static BOOL
-internal_transport_write_message(address_item *addr, int fd, int options,
- int size_limit, uschar *add_headers, uschar *remove_headers, uschar *check_string,
- uschar *escape_string, rewrite_rule *rewrite_rules, int rewrite_existflags)
+internal_transport_write_message(int fd, transport_ctx * tctx, int size_limit)
{
-int written = 0;
int len;
-header_line *h;
-BOOL use_crlf = (options & topt_use_crlf) != 0;
/* Initialize pointer in output buffer. */
/* Set up the data for start-of-line data checking and escaping */
nl_partial_match = -1;
-if (check_string != NULL && escape_string != NULL)
+if (tctx->check_string && tctx->escape_string)
{
- nl_check = check_string;
+ nl_check = tctx->check_string;
nl_check_length = Ustrlen(nl_check);
- nl_escape = escape_string;
+ nl_escape = tctx->escape_string;
nl_escape_length = Ustrlen(nl_escape);
}
-else nl_check_length = nl_escape_length = 0;
+else
+ nl_check_length = nl_escape_length = 0;
/* Whether the escaping mechanism is applied to headers or not is controlled by
an option (set for SMTP, not otherwise). Negate the length if not wanted till
after the headers. */
-if ((options & topt_escape_headers) == 0) nl_check_length = -nl_check_length;
+if (!(tctx->options & topt_escape_headers))
+ nl_check_length = -nl_check_length;
/* Write the headers if required, including any that have to be added. If there
are header rewriting rules, apply them. */
-if ((options & topt_no_headers) == 0)
+if (!(tctx->options & topt_no_headers))
{
/* Add return-path: if requested. */
- if ((options & topt_add_return_path) != 0)
+ if (tctx->options & topt_add_return_path)
{
uschar buffer[ADDRESS_MAXLENGTH + 20];
- sprintf(CS buffer, "Return-path: <%.*s>\n", ADDRESS_MAXLENGTH,
+ int n = sprintf(CS buffer, "Return-path: <%.*s>\n", ADDRESS_MAXLENGTH,
return_path);
- if (!write_chunk(fd, buffer, Ustrlen(buffer), use_crlf)) return FALSE;
+ if (!write_chunk(fd, tctx, buffer, n)) return FALSE;
}
/* Add envelope-to: if requested */
- if ((options & topt_add_envelope_to) != 0)
+ if (tctx->options & topt_add_envelope_to)
{
BOOL first = TRUE;
address_item *p;
struct aci *dlist = NULL;
void *reset_point = store_get(0);
- if (!write_chunk(fd, US"Envelope-to: ", 13, use_crlf)) return FALSE;
+ if (!write_chunk(fd, tctx, US"Envelope-to: ", 13)) return FALSE;
/* Pick up from all the addresses. The plist and dlist variables are
anchors for lists of addresses already handled; they have to be defined at
this level becuase write_env_to() calls itself recursively. */
- for (p = addr; p != NULL; p = p->next)
- {
- if (!write_env_to(p, &plist, &dlist, &first, fd, use_crlf)) return FALSE;
- }
+ for (p = tctx->addr; p; p = p->next)
+ if (!write_env_to(p, &plist, &dlist, &first, fd, tctx))
+ return FALSE;
/* Add a final newline and reset the store used for tracking duplicates */
- if (!write_chunk(fd, US"\n", 1, use_crlf)) return FALSE;
+ if (!write_chunk(fd, tctx, US"\n", 1)) return FALSE;
store_reset(reset_point);
}
/* Add delivery-date: if requested. */
- if ((options & topt_add_delivery_date) != 0)
+ if (tctx->options & topt_add_delivery_date)
{
uschar buffer[100];
- sprintf(CS buffer, "Delivery-date: %s\n", tod_stamp(tod_full));
- if (!write_chunk(fd, buffer, Ustrlen(buffer), use_crlf)) return FALSE;
+ int n = sprintf(CS buffer, "Delivery-date: %s\n", tod_stamp(tod_full));
+ if (!write_chunk(fd, tctx, buffer, n)) return FALSE;
}
/* Then the message's headers. Don't write any that are flagged as "old";
that means they were rewritten, or are a record of envelope rewriting, or
were removed (e.g. Bcc). If remove_headers is not null, skip any headers that
- match any entries therein. Then check addr->p.remove_headers too, provided that
+ match any entries therein. Then check addr->prop.remove_headers too, provided that
addr is not NULL. */
- if (remove_headers != NULL)
+ if (!transport_headers_send(fd, tctx, &write_chunk))
+ return FALSE;
+ }
+
+/* When doing RFC3030 CHUNKING output, work out how much data will be in the
+last BDAT, consisting of the current write_chunk() output buffer fill
+(optimally, all of the headers - but it does not matter if we already had to
+flush that buffer with non-last BDAT prependix) plus the amount of body data
+(as expanded for CRLF lines). Then create and write the BDAT, and ensure
+that further use of write_chunk() will not prepend BDATs.
+The first BDAT written will also first flush any outstanding MAIL and RCPT
+commands which were buffered thans to PIPELINING.
+Commands go out (using a send()) from a different buffer to data (using a
+write()). They might not end up in the same TCP segment, which is
+suboptimal. */
+
+if (tctx->options & topt_use_bdat)
+ {
+ off_t fsize;
+ int hsize, size;
+
+ if ((hsize = chunk_ptr - deliver_out_buffer) < 0)
+ hsize = 0;
+ if (!(tctx->options & topt_no_body))
{
- uschar *s = expand_string(remove_headers);
- if (s == NULL && !expand_string_forcedfail)
- {
- errno = ERRNO_CHHEADER_FAIL;
+ if ((fsize = lseek(deliver_datafile, 0, SEEK_END)) < 0) return FALSE;
+ fsize -= SPOOL_DATA_START_OFFSET;
+ if (size_limit > 0 && fsize > size_limit)
+ fsize = size_limit;
+ size = hsize + fsize;
+ if (tctx->options & topt_use_crlf)
+ size += body_linecount; /* account for CRLF-expansion */
+ }
+
+ /* If the message is large, emit first a non-LAST chunk with just the
+ headers, and reap the command responses. This lets us error out early
+ on RCPT rejects rather than sending megabytes of data. Include headers
+ on the assumption they are cheap enough and some clever implementations
+ might errorcheck them too, on-the-fly, and reject that chunk. */
+
+ if (size > DELIVER_OUT_BUFFER_SIZE && hsize > 0)
+ {
+ if ( tctx->chunk_cb(fd, tctx, hsize, 0) != OK
+ || !transport_write_block(fd, deliver_out_buffer, hsize)
+ || tctx->chunk_cb(fd, tctx, 0, tc_reap_prev) != OK
+ )
return FALSE;
- }
- remove_headers = s;
+ chunk_ptr = deliver_out_buffer;
+ size -= hsize;
}
- for (h = header_list; h != NULL; h = h->next)
+ /* Emit a LAST datachunk command. */
+
+ if (tctx->chunk_cb(fd, tctx, size, tc_chunk_last) != OK)
+ return FALSE;
+
+ tctx->options &= ~topt_use_bdat;
+ }
+
+/* If the body is required, ensure that the data for check strings (formerly
+the "from hack") is enabled by negating the length if necessary. (It will be
+negative in cases where it isn't to apply to the headers). Then ensure the body
+is positioned at the start of its file (following the message id), then write
+it, applying the size limit if required. */
+
+if (!(tctx->options & topt_no_body))
+ {
+ int size = size_limit;
+
+ nl_check_length = abs(nl_check_length);
+ nl_partial_match = 0;
+ if (lseek(deliver_datafile, SPOOL_DATA_START_OFFSET, SEEK_SET) < 0)
+ return FALSE;
+ while ( (len = MAX(DELIVER_IN_BUFFER_SIZE, size)) > 0
+ && (len = read(deliver_datafile, deliver_in_buffer, len)) > 0)
{
- int i;
- uschar *list = NULL;
- BOOL include_header;
+ if (!write_chunk(fd, tctx, deliver_in_buffer, len))
+ return FALSE;
+ size -= len;
+ }
- if (h->type == htype_old) continue;
+ /* A read error on the body will have left len == -1 and errno set. */
- include_header = TRUE;
- list = remove_headers;
+ if (len != 0) return FALSE;
+ }
- for (i = 0; i < 2; i++) /* For remove_headers && addr->p.remove_headers */
- {
- if (list != NULL)
- {
- int sep = ':'; /* This is specified as a colon-separated list */
- uschar *s, *ss;
- uschar buffer[128];
- while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer)))
- != NULL)
- {
- int len = Ustrlen(s);
- if (strncmpic(h->text, s, len) != 0) continue;
- ss = h->text + len;
- while (*ss == ' ' || *ss == '\t') ss++;
- if (*ss == ':') break;
- }
- if (s != NULL) { include_header = FALSE; break; }
- }
- if (addr != NULL) list = addr->p.remove_headers;
- }
+/* Finished with the check string */
- /* If this header is to be output, try to rewrite it if there are rewriting
- rules. */
+nl_check_length = nl_escape_length = 0;
- if (include_header)
- {
- if (rewrite_rules != NULL)
- {
- void *reset_point = store_get(0);
- header_line *hh =
- rewrite_header(h, NULL, NULL, rewrite_rules, rewrite_existflags,
- FALSE);
- if (hh != NULL)
- {
- if (!write_chunk(fd, hh->text, hh->slen, use_crlf)) return FALSE;
- store_reset(reset_point);
- continue; /* With the next header line */
- }
- }
+/* If requested, add a terminating "." line (SMTP output). */
- /* Either no rewriting rules, or it didn't get rewritten */
+if (tctx->options & topt_end_dot && !write_chunk(fd, tctx, US".\n", 2))
+ return FALSE;
- if (!write_chunk(fd, h->text, h->slen, use_crlf)) return FALSE;
- }
+/* Write out any remaining data in the buffer before returning. */
- /* Header removed */
+return (len = chunk_ptr - deliver_out_buffer) <= 0 ||
+ transport_write_block(fd, deliver_out_buffer, len);
+}
- else
- {
- DEBUG(D_transport) debug_printf("removed header line:\n%s---\n",
- h->text);
- }
- }
- /* Add on any address-specific headers. If there are multiple addresses,
- they will all have the same headers in order to be batched. The headers
- are chained in reverse order of adding (so several addresses from the
- same alias might share some of them) but we want to output them in the
- opposite order. This is a bit tedious, but there shouldn't be very many
- of them. We just walk the list twice, reversing the pointers each time,
- but on the second time, write out the items. */
+#ifndef DISABLE_DKIM
- if (addr != NULL)
- {
- int i;
- header_line *hprev = addr->p.extra_headers;
- header_line *hnext;
- for (i = 0; i < 2; i++)
- {
- for (h = hprev, hprev = NULL; h != NULL; h = hnext)
- {
- hnext = h->next;
- h->next = hprev;
- hprev = h;
- if (i == 1)
- {
- if (!write_chunk(fd, h->text, h->slen, use_crlf)) return FALSE;
- DEBUG(D_transport)
- debug_printf("added header line(s):\n%s---\n", h->text);
- }
- }
- }
- }
+/***************************************************************************************************
+* External interface to write the message, while signing it with DKIM and/or Domainkeys *
+***************************************************************************************************/
- /* If a string containing additional headers exists, expand it and write
- out the result. This is done last so that if it (deliberately or accidentally)
- isn't in header format, it won't mess up any other headers. An empty string
- or a forced expansion failure are noops. */
+/* This function is a wrapper around transport_write_message().
+ It is only called from the smtp transport if DKIM or Domainkeys support
+ is compiled in. The function sets up a replacement fd into a -K file,
+ then calls the normal function. This way, the exact bits that exim would
+ have put "on the wire" will end up in the file (except for TLS
+ encapsulation, which is the very very last thing). When we are done
+ signing the file, send the signed message down the original fd (or TLS fd).
- if (add_headers != NULL)
- {
- uschar *s = expand_string(add_headers);
- if (s == NULL)
- {
- if (!expand_string_forcedfail)
- {
- errno = ERRNO_CHHEADER_FAIL;
- return FALSE;
- }
- }
- else
- {
- int len = Ustrlen(s);
- if (len > 0)
- {
- if (!write_chunk(fd, s, len, use_crlf)) return FALSE;
- if (s[len-1] != '\n' && !write_chunk(fd, US"\n", 1, use_crlf))
- return FALSE;
- DEBUG(D_transport)
- debug_printf("added header line(s):\n%s---\n", s);
- }
- }
- }
+Arguments:
+ as for internal_transport_write_message() above, with additional arguments
+ for DKIM.
- /* Separate headers from body with a blank line */
+Returns: TRUE on success; FALSE (with errno) for any failure
+*/
- if (!write_chunk(fd, US"\n", 1, use_crlf)) return FALSE;
+BOOL
+dkim_transport_write_message(int out_fd, transport_ctx * tctx,
+ struct ob_dkim * dkim)
+{
+int dkim_fd;
+int save_errno = 0;
+BOOL rc;
+uschar * dkim_spool_name;
+int sread = 0;
+int wwritten = 0;
+uschar *dkim_signature = NULL;
+int siglen = 0;
+off_t k_file_size;
+int options;
+
+/* If we can't sign, just call the original function. */
+
+if (!(dkim->dkim_private_key && dkim->dkim_domain && dkim->dkim_selector))
+ return transport_write_message(out_fd, tctx, 0);
+
+dkim_spool_name = spool_fname(US"input", message_subdir, message_id,
+ string_sprintf("-%d-K", (int)getpid()));
+
+if ((dkim_fd = Uopen(dkim_spool_name, O_RDWR|O_CREAT|O_TRUNC, SPOOL_MODE)) < 0)
+ {
+ /* Can't create spool file. Ugh. */
+ rc = FALSE;
+ save_errno = errno;
+ goto CLEANUP;
}
-/* If the body is required, ensure that the data for check strings (formerly
-the "from hack") is enabled by negating the length if necessary. (It will be
-negative in cases where it isn't to apply to the headers). Then ensure the body
-is positioned at the start of its file (following the message id), then write
-it, applying the size limit if required. */
+/* Call original function to write the -K file; does the CRLF expansion */
-if ((options & topt_no_body) == 0)
+options = tctx->options;
+tctx->options &= ~topt_use_bdat;
+rc = transport_write_message(dkim_fd, tctx, 0);
+tctx->options = options;
+
+/* Save error state. We must clean up before returning. */
+if (!rc)
{
- nl_check_length = abs(nl_check_length);
- nl_partial_match = 0;
- lseek(deliver_datafile, SPOOL_DATA_START_OFFSET, SEEK_SET);
- while ((len = read(deliver_datafile, deliver_in_buffer,
- DELIVER_IN_BUFFER_SIZE)) > 0)
- {
- if (!write_chunk(fd, deliver_in_buffer, len, use_crlf)) return FALSE;
- if (size_limit > 0)
+ save_errno = errno;
+ goto CLEANUP;
+ }
+
+/* Rewind file and feed it to the goats^W DKIM lib */
+lseek(dkim_fd, 0, SEEK_SET);
+dkim_signature = dkim_exim_sign(dkim_fd,
+ dkim->dkim_private_key,
+ dkim->dkim_domain,
+ dkim->dkim_selector,
+ dkim->dkim_canon,
+ dkim->dkim_sign_headers);
+if (dkim_signature)
+ siglen = Ustrlen(dkim_signature);
+else if (dkim->dkim_strict)
+ {
+ uschar *dkim_strict_result = expand_string(dkim->dkim_strict);
+ if (dkim_strict_result)
+ if ( (strcmpic(dkim->dkim_strict,US"1") == 0) ||
+ (strcmpic(dkim->dkim_strict,US"true") == 0) )
{
- written += len;
- if (written > size_limit)
- {
- len = 0; /* Pretend EOF */
- break;
- }
+ /* Set errno to something halfway meaningful */
+ save_errno = EACCES;
+ log_write(0, LOG_MAIN, "DKIM: message could not be signed,"
+ " and dkim_strict is set. Deferring message delivery.");
+ rc = FALSE;
+ goto CLEANUP;
}
+ }
+
+#ifndef HAVE_LINUX_SENDFILE
+if (options & topt_use_bdat)
+#endif
+ k_file_size = lseek(dkim_fd, 0, SEEK_END); /* Fetch file size */
+
+if (options & topt_use_bdat)
+ {
+
+ /* On big messages output a precursor chunk to get any pipelined
+ MAIL & RCPT commands flushed, then reap the responses so we can
+ error out on RCPT rejects before sending megabytes. */
+
+ if (siglen + k_file_size > DELIVER_OUT_BUFFER_SIZE && siglen > 0)
+ {
+ if ( tctx->chunk_cb(out_fd, tctx, siglen, 0) != OK
+ || !transport_write_block(out_fd, dkim_signature, siglen)
+ || tctx->chunk_cb(out_fd, tctx, 0, tc_reap_prev) != OK
+ )
+ goto err;
+ siglen = 0;
}
- /* Finished with the check string */
+ if (tctx->chunk_cb(out_fd, tctx, siglen + k_file_size, tc_chunk_last) != OK)
+ goto err;
+ }
- nl_check_length = nl_escape_length = 0;
+if(siglen > 0 && !transport_write_block(out_fd, dkim_signature, siglen))
+ goto err;
- /* A read error on the body will have left len == -1 and errno set. */
+#ifdef HAVE_LINUX_SENDFILE
+/* We can use sendfile() to shove the file contents
+ to the socket. However only if we don't use TLS,
+ as then there's another layer of indirection
+ before the data finally hits the socket. */
+if (tls_out.active != out_fd)
+ {
+ ssize_t copied = 0;
+ off_t offset = 0;
- if (len != 0) return FALSE;
+ /* Rewind file */
+ lseek(dkim_fd, 0, SEEK_SET);
- /* If requested, add a terminating "." line (SMTP output). */
+ while(copied >= 0 && offset < k_file_size)
+ copied = sendfile(out_fd, dkim_fd, &offset, k_file_size - offset);
+ if (copied < 0)
+ goto err;
+ }
+else
- if ((options & topt_end_dot) != 0 && !write_chunk(fd, US".\n", 2, use_crlf))
- return FALSE;
+#endif
+
+ {
+ /* Rewind file */
+ lseek(dkim_fd, 0, SEEK_SET);
+
+ /* Send file down the original fd */
+ while((sread = read(dkim_fd, deliver_out_buffer, DELIVER_OUT_BUFFER_SIZE)) >0)
+ {
+ char *p = deliver_out_buffer;
+ /* write the chunk */
+
+ while (sread)
+ {
+#ifdef SUPPORT_TLS
+ wwritten = tls_out.active == out_fd
+ ? tls_write(FALSE, US p, sread)
+ : write(out_fd, p, sread);
+#else
+ wwritten = write(out_fd, p, sread);
+#endif
+ if (wwritten == -1)
+ goto err;
+ p += wwritten;
+ sread -= wwritten;
+ }
+ }
+
+ if (sread == -1)
+ {
+ save_errno = errno;
+ rc = FALSE;
+ }
}
-/* Write out any remaining data in the buffer before returning. */
+CLEANUP:
+ /* unlink -K file */
+ (void)close(dkim_fd);
+ Uunlink(dkim_spool_name);
+ errno = save_errno;
+ return rc;
-return (len = chunk_ptr - deliver_out_buffer) <= 0 ||
- transport_write_block(fd, deliver_out_buffer, len);
+err:
+ save_errno = errno;
+ rc = FALSE;
+ goto CLEANUP;
}
+#endif
*/
BOOL
-transport_write_message(address_item *addr, int fd, int options,
- int size_limit, uschar *add_headers, uschar *remove_headers,
- uschar *check_string, uschar *escape_string, rewrite_rule *rewrite_rules,
- int rewrite_existflags)
+transport_write_message(int fd, transport_ctx * tctx, int size_limit)
{
-BOOL use_crlf;
+unsigned wck_flags;
BOOL last_filter_was_NL = TRUE;
int rc, len, yield, fd_read, fd_write, save_errno;
-int pfd[2];
+int pfd[2] = {-1, -1};
pid_t filter_pid, write_pid;
+static transport_ctx dummy_tctx = {0};
+
+if (!tctx) tctx = &dummy_tctx;
+
+transport_filter_timed_out = FALSE;
/* If there is no filter command set up, call the internal function that does
the actual work, passing it the incoming fd, and return its result. */
-if (transport_filter_argv == NULL)
- return internal_transport_write_message(addr, fd, options, size_limit,
- add_headers, remove_headers, check_string, escape_string,
- rewrite_rules, rewrite_existflags);
+if ( !transport_filter_argv
+ || !*transport_filter_argv
+ || !**transport_filter_argv
+ )
+ return internal_transport_write_message(fd, tctx, size_limit);
/* Otherwise the message must be written to a filter process and read back
before being written to the incoming fd. First set up the special processing to
be done during the copying. */
-use_crlf = (options & topt_use_crlf) != 0;
+wck_flags = tctx->options & topt_use_crlf;
nl_partial_match = -1;
-if (check_string != NULL && escape_string != NULL)
+if (tctx->check_string && tctx->escape_string)
{
- nl_check = check_string;
+ nl_check = tctx->check_string;
nl_check_length = Ustrlen(nl_check);
- nl_escape = escape_string;
+ nl_escape = tctx->escape_string;
nl_escape_length = Ustrlen(nl_escape);
}
else nl_check_length = nl_escape_length = 0;
yield = FALSE;
write_pid = (pid_t)(-1);
-fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
-filter_pid = child_open(transport_filter_argv, NULL, 077, &fd_write, &fd_read,
- FALSE);
-fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) & ~FD_CLOEXEC);
+(void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+filter_pid = child_open(USS transport_filter_argv, NULL, 077,
+ &fd_write, &fd_read, FALSE);
+(void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) & ~FD_CLOEXEC);
if (filter_pid < 0) goto TIDY_UP; /* errno set */
DEBUG(D_transport)
- debug_printf("process %d running as transport filter: write=%d read=%d\n",
+ debug_printf("process %d running as transport filter: fd_write=%d fd_read=%d\n",
(int)filter_pid, fd_write, fd_read);
/* Fork subprocess to write the message to the filter, and return the result
if ((write_pid = fork()) == 0)
{
BOOL rc;
- close(fd_read);
- close(pfd[pipe_read]);
+ (void)close(fd_read);
+ (void)close(pfd[pipe_read]);
nl_check_length = nl_escape_length = 0;
- rc = internal_transport_write_message(addr, fd_write,
- (options & ~(topt_use_crlf | topt_end_dot)),
- size_limit, add_headers, remove_headers, NULL, NULL,
- rewrite_rules, rewrite_existflags);
+
+ tctx->check_string = tctx->escape_string = NULL;
+ tctx->options &= ~(topt_use_crlf | topt_end_dot | topt_use_bdat);
+
+ rc = internal_transport_write_message(fd_write, tctx, size_limit);
+
save_errno = errno;
- write(pfd[pipe_write], (void *)&rc, sizeof(BOOL));
- write(pfd[pipe_write], (void *)&save_errno, sizeof(int));
- write(pfd[pipe_write], (void *)&(addr->more_errno), sizeof(int));
+ if ( write(pfd[pipe_write], (void *)&rc, sizeof(BOOL))
+ != sizeof(BOOL)
+ || write(pfd[pipe_write], (void *)&save_errno, sizeof(int))
+ != sizeof(int)
+ || write(pfd[pipe_write], (void *)&tctx->addr->more_errno, sizeof(int))
+ != sizeof(int)
+ )
+ rc = FALSE; /* compiler quietening */
_exit(0);
}
save_errno = errno;
/* Parent process: close our copy of the writing subprocess' pipes. */
-close(pfd[pipe_write]);
-close(fd_write);
+(void)close(pfd[pipe_write]);
+(void)close(fd_write);
fd_write = -1;
/* Writing process creation failed */
if (sigalrm_seen)
{
errno = ETIMEDOUT;
+ transport_filter_timed_out = TRUE;
goto TIDY_UP;
}
if (len > 0)
{
- if (!write_chunk(fd, deliver_in_buffer, len, use_crlf)) goto TIDY_UP;
+ if (!write_chunk(fd, tctx, deliver_in_buffer, len)) goto TIDY_UP;
last_filter_was_NL = (deliver_in_buffer[len-1] == '\n');
}
TIDY_UP:
save_errno = errno;
-close(fd_read);
-if (fd_write > 0) close(fd_write);
+(void)close(fd_read);
+if (fd_write > 0) (void)close(fd_write);
if (!yield)
{
{
yield = FALSE;
save_errno = ERRNO_FILTER_FAIL;
- addr->more_errno = rc;
+ tctx->addr->more_errno = rc;
DEBUG(D_transport) debug_printf("filter process returned %d\n", rc);
}
/* Wait for the writing process to complete. If it ends successfully,
-read the results from its pipe, provided we haven't already had a filter
+read the results from its pipe, provided we haven't already had a filter
process failure. */
DEBUG(D_transport) debug_printf("waiting for writing process\n");
rc = child_close(write_pid, 30);
if (yield)
{
- if (rc == 0)
+ if (rc == 0)
{
BOOL ok;
- read(pfd[pipe_read], (void *)&ok, sizeof(BOOL));
+ int dummy = read(pfd[pipe_read], (void *)&ok, sizeof(BOOL));
if (!ok)
{
- read(pfd[pipe_read], (void *)&save_errno, sizeof(int));
- read(pfd[pipe_read], (void *)&(addr->more_errno), sizeof(int));
+ dummy = read(pfd[pipe_read], (void *)&save_errno, sizeof(int));
+ dummy = read(pfd[pipe_read], (void *)&(tctx->addr->more_errno), sizeof(int));
yield = FALSE;
}
}
{
yield = FALSE;
save_errno = ERRNO_FILTER_FAIL;
- addr->more_errno = rc;
+ tctx->addr->more_errno = rc;
DEBUG(D_transport) debug_printf("writing process returned %d\n", rc);
}
- }
+ }
}
-close(pfd[pipe_read]);
+(void)close(pfd[pipe_read]);
/* If there have been no problems we can now add the terminating "." if this is
SMTP output, turning off escaping beforehand. If the last character from the
if (yield)
{
nl_check_length = nl_escape_length = 0;
- if ((options & topt_end_dot) != 0 && (last_filter_was_NL?
- !write_chunk(fd, US".\n", 2, use_crlf) :
- !write_chunk(fd, US"\n.\n", 3, use_crlf)))
- {
+ if ( tctx->options & topt_end_dot
+ && ( last_filter_was_NL
+ ? !write_chunk(fd, tctx, US".\n", 2)
+ : !write_chunk(fd, tctx, US"\n.\n", 3)
+ ) )
yield = FALSE;
- }
/* Write out any remaining data in the buffer. */
else
- {
- yield = (len = chunk_ptr - deliver_out_buffer) <= 0 ||
- transport_write_block(fd, deliver_out_buffer, len);
- }
+ yield = (len = chunk_ptr - deliver_out_buffer) <= 0
+ || transport_write_block(fd, deliver_out_buffer, len);
}
-else errno = save_errno; /* From some earlier error */
+else
+ errno = save_errno; /* From some earlier error */
DEBUG(D_transport)
{
debug_printf("end of filtering transport writing: yield=%d\n", yield);
if (!yield)
- debug_printf("errno=%d more_errno=%d\n", errno, addr->more_errno);
+ debug_printf("errno=%d more_errno=%d\n", errno, tctx->addr->more_errno);
}
return yield;
Old records should eventually get swept up by the exim_tidydb utility.
Arguments:
- hostlist list of hosts that this message could be sent to;
- the update_waiting flag is set if a host is to be noted
+ hostlist list of hosts that this message could be sent to
tpname name of the transport
Returns: nothing
transport_update_waiting(host_item *hostlist, uschar *tpname)
{
uschar buffer[256];
-uschar *prevname = US"";
+const uschar *prevname = US"";
host_item *host;
open_db dbblock;
open_db *dbm_file;
+DEBUG(D_transport) debug_printf("updating wait-%s database\n", tpname);
+
/* Open the database for this transport */
sprintf(CS buffer, "wait-%.200s", tpname);
if (dbm_file == NULL) return;
/* Scan the list of hosts for which this message is waiting, and ensure
-that the message id is in each host record for those that have the
-update_waiting flag set. */
+that the message id is in each host record. */
for (host = hostlist; host!= NULL; host = host->next)
{
uschar *s;
int i, host_length;
- /* Skip if the update_waiting flag is not set. */
-
- if (!host->update_waiting) continue;
-
/* Skip if this is the same host as we just processed; otherwise remember
the name for next time. */
/* If this message is already in a record, no need to update. */
- if (already) continue;
+ if (already)
+ {
+ DEBUG(D_transport) debug_printf("already listed for %s\n", host->name);
+ continue;
+ }
/* If this record is full, write it out with a new name constructed
/* Update the database */
dbfn_write(dbm_file, host->name, host_record, sizeof(dbdata_wait) + host_length);
+ DEBUG(D_transport) debug_printf("added to list for %s\n", host->name);
}
/* All now done */
as set by the caller transport
new_message_id set to the message id of a waiting message
more set TRUE if there are yet more messages waiting
+ oicf_func function to call to validate if it is ok to send
+ to this message_id from the current instance.
+ oicf_data opaque data for oicf_func
Returns: TRUE if new_message_id set; FALSE otherwise
*/
+typedef struct msgq_s
+{
+ uschar message_id [MESSAGE_ID_LENGTH + 1];
+ BOOL bKeep;
+} msgq_t;
+
BOOL
-transport_check_waiting(uschar *transport_name, uschar *hostname,
- int local_message_max, uschar *new_message_id, BOOL *more)
+transport_check_waiting(const uschar *transport_name, const uschar *hostname,
+ int local_message_max, uschar *new_message_id, BOOL *more, oicf oicf_func, void *oicf_data)
{
dbdata_wait *host_record;
-int host_length, path_len;
+int host_length;
open_db dbblock;
open_db *dbm_file;
uschar buffer[256];
+int i;
+struct stat statbuf;
+
*more = FALSE;
DEBUG(D_transport)
/* See if there is a record for this host; if not, there's nothing to do. */
-host_record = dbfn_read(dbm_file, hostname);
-if (host_record == NULL)
+if (!(host_record = dbfn_read(dbm_file, hostname)))
{
dbfn_close(dbm_file);
DEBUG(D_transport) debug_printf("no messages waiting for %s\n", hostname);
emptied, delete it and continue with any continuation records that may exist.
*/
-host_length = host_record->count * MESSAGE_ID_LENGTH;
+/* For Bug 1141, I refactored this major portion of the routine, it is risky
+but the 1 off will remain without it. This code now allows me to SKIP over
+a message I do not want to send out on this run. */
-/* Loop to handle continuation host records in the database */
+host_length = host_record->count * MESSAGE_ID_LENGTH;
-for (;;)
+while (1)
{
- BOOL found = FALSE;
+ msgq_t *msgq;
+ int msgq_count = 0;
+ int msgq_actual = 0;
+ BOOL bFound = FALSE;
+ BOOL bContinuation = FALSE;
+
+ /* create an array to read entire message queue into memory for processing */
- sprintf(CS buffer, "%s/input/", spool_directory);
- path_len = Ustrlen(buffer);
+ msgq = (msgq_t*) malloc(sizeof(msgq_t) * host_record->count);
+ msgq_count = host_record->count;
+ msgq_actual = msgq_count;
- for (host_length -= MESSAGE_ID_LENGTH; host_length >= 0;
- host_length -= MESSAGE_ID_LENGTH)
+ for (i = 0; i < host_record->count; ++i)
{
- struct stat statbuf;
- Ustrncpy(new_message_id, host_record->text + host_length,
+ msgq[i].bKeep = TRUE;
+
+ Ustrncpy(msgq[i].message_id, host_record->text + (i * MESSAGE_ID_LENGTH),
MESSAGE_ID_LENGTH);
- new_message_id[MESSAGE_ID_LENGTH] = 0;
+ msgq[i].message_id[MESSAGE_ID_LENGTH] = 0;
+ }
- if (split_spool_directory)
- sprintf(CS(buffer + path_len), "%c/%s-D", new_message_id[5], new_message_id);
- else
- sprintf(CS(buffer + path_len), "%s-D", new_message_id);
+ /* first thing remove current message id if it exists */
+
+ for (i = 0; i < msgq_count; ++i)
+ if (Ustrcmp(msgq[i].message_id, message_id) == 0)
+ {
+ msgq[i].bKeep = FALSE;
+ break;
+ }
- /* The listed message may be the one we are currently processing. If
- so, we want to remove it from the list without doing anything else.
- If not, do a stat to see if it is an existing message. If it is, break
- the loop to handle it. No need to bother about locks; as this is all
- "hint" processing, it won't matter if it doesn't exist by the time exim
- actually tries to deliver it. */
+ /* now find the next acceptable message_id */
- if (Ustrcmp(new_message_id, message_id) != 0 &&
- Ustat(buffer, &statbuf) == 0)
+ for (i = msgq_count - 1; i >= 0; --i) if (msgq[i].bKeep)
+ {
+ uschar subdir[2];
+
+ subdir[0] = split_spool_directory ? msgq[i].message_id[5] : 0;
+ subdir[1] = 0;
+
+ if (Ustat(spool_fname(US"input", subdir, msgq[i].message_id, US"-D"),
+ &statbuf) != 0)
+ msgq[i].bKeep = FALSE;
+ else if (!oicf_func || oicf_func(msgq[i].message_id, oicf_data))
{
- found = TRUE;
+ Ustrcpy(new_message_id, msgq[i].message_id);
+ msgq[i].bKeep = FALSE;
+ bFound = TRUE;
break;
}
}
- /* If we have removed all the message ids from the record delete the record.
- If there is a continuation record, fetch it and remove it from the file,
- as it will be rewritten as the main record. Repeat in the case of an
- empty continuation. */
+ /* re-count */
+ for (msgq_actual = 0, i = 0; i < msgq_count; ++i)
+ if (msgq[i].bKeep)
+ msgq_actual++;
+
+ /* reassemble the host record, based on removed message ids, from in
+ memory queue */
+
+ if (msgq_actual <= 0)
+ {
+ host_length = 0;
+ host_record->count = 0;
+ }
+ else
+ {
+ host_length = msgq_actual * MESSAGE_ID_LENGTH;
+ host_record->count = msgq_actual;
+
+ if (msgq_actual < msgq_count)
+ {
+ int new_count;
+ for (new_count = 0, i = 0; i < msgq_count; ++i)
+ if (msgq[i].bKeep)
+ Ustrncpy(&host_record->text[new_count++ * MESSAGE_ID_LENGTH],
+ msgq[i].message_id, MESSAGE_ID_LENGTH);
+
+ host_record->text[new_count * MESSAGE_ID_LENGTH] = 0;
+ }
+ }
+
+/* Jeremy: check for a continuation record, this code I do not know how to
+test but the code should work */
while (host_length <= 0)
{
int i;
- dbdata_wait *newr = NULL;
+ dbdata_wait * newr = NULL;
/* Search for a continuation */
- for (i = host_record->sequence - 1; i >= 0 && newr == NULL; i--)
+ for (i = host_record->sequence - 1; i >= 0 && !newr; i--)
{
sprintf(CS buffer, "%.200s:%d", hostname, i);
newr = dbfn_read(dbm_file, buffer);
/* If no continuation, delete the current and break the loop */
- if (newr == NULL)
+ if (!newr)
{
dbfn_delete(dbm_file, hostname);
break;
dbfn_delete(dbm_file, buffer);
host_record = newr;
host_length = host_record->count * MESSAGE_ID_LENGTH;
- }
- /* If we found an existing message, break the continuation loop. */
+ bContinuation = TRUE;
+ }
- if (found) break;
+ if (bFound) /* Usual exit from main loop */
+ {
+ free (msgq);
+ break;
+ }
/* If host_length <= 0 we have emptied a record and not found a good message,
and there are no continuation records. Otherwise there is a continuation
DEBUG(D_transport) debug_printf("waiting messages already delivered\n");
return FALSE;
}
- }
+
+ /* we were not able to find an acceptable message, nor was there a
+ * continuation record. So bug out, outer logic will clean this up.
+ */
+
+ if (!bContinuation)
+ {
+ Ustrcpy(new_message_id, message_id);
+ dbfn_close(dbm_file);
+ return FALSE;
+ }
+
+ free(msgq);
+ } /* we need to process a continuation record */
/* Control gets here when an existing message has been encountered; its
id is in new_message_id, and host_length is the revised length of the
if (host_length > 0)
{
host_record->count = host_length/MESSAGE_ID_LENGTH;
+
dbfn_write(dbm_file, hostname, host_record, (int)sizeof(dbdata_wait) + host_length);
*more = TRUE;
}
return TRUE;
}
-
-
/*************************************************
* Deliver waiting message down same socket *
*************************************************/
*/
BOOL
-transport_pass_socket(uschar *transport_name, uschar *hostname,
- uschar *hostaddress, uschar *id, int socket_fd)
+transport_pass_socket(const uschar *transport_name, const uschar *hostname,
+ const uschar *hostaddress, uschar *id, int socket_fd)
{
pid_t pid;
int status;
if ((pid = fork()) == 0)
{
- int i = 16;
- uschar **argv;
+ int i = 17;
+ const uschar **argv;
/* Disconnect entirely from the parent process. If we are running in the
test harness, wait for a bit to allow the previous process time to finish,
automatic comparison. */
if ((pid = fork()) != 0) _exit(EXIT_SUCCESS);
- if (running_in_test_harness) millisleep(500);
+ if (running_in_test_harness) sleep(1);
/* Set up the calling arguments; use the standard function for the basics,
but we have a number of extras that may be added. */
- argv = child_exec_exim(CEE_RETURN_ARGV, TRUE, &i, FALSE, 0);
+ argv = CUSS child_exec_exim(CEE_RETURN_ARGV, TRUE, &i, FALSE, 0);
if (smtp_authenticated) argv[i++] = US"-MCA";
- #ifdef SUPPORT_TLS
- if (tls_offered) argv[i++] = US"-MCT";
- #endif
-
- if (smtp_use_size) argv[i++] = US"-MCS";
- if (smtp_use_pipelining) argv[i++] = US"-MCP";
+ if (smtp_peer_options & PEER_OFFERED_CHUNKING) argv[i++] = US"-MCK";
+ if (smtp_peer_options & PEER_OFFERED_DSN) argv[i++] = US"-MCD";
+ if (smtp_peer_options & PEER_OFFERED_PIPE) argv[i++] = US"-MCP";
+ if (smtp_peer_options & PEER_OFFERED_SIZE) argv[i++] = US"-MCS";
+#ifdef SUPPORT_TLS
+ if (smtp_peer_options & PEER_OFFERED_TLS) argv[i++] = US"-MCT";
+#endif
if (queue_run_pid != (pid_t)0)
{
}
argv[i++] = US"-MC";
- argv[i++] = transport_name;
- argv[i++] = hostname;
- argv[i++] = hostaddress;
+ argv[i++] = US transport_name;
+ argv[i++] = US hostname;
+ argv[i++] = US hostaddress;
argv[i++] = string_sprintf("%d", continue_sequence + 1);
argv[i++] = id;
argv[i++] = NULL;
if (socket_fd != 0)
{
- dup2(socket_fd, 0);
- close(socket_fd);
+ (void)dup2(socket_fd, 0);
+ (void)close(socket_fd);
}
DEBUG(D_exec) debug_print_argv(argv);
Arguments:
argvptr pointer to anchor for argv vector
- cmd points to the command string
+ cmd points to the command string (modified IN PLACE)
expand_arguments true if expansion is to occur
expand_failed error value to set if expansion fails; not relevant if
addr == NULL
*/
BOOL
-transport_set_up_command(uschar ***argvptr, uschar *cmd, BOOL expand_arguments,
- int expand_failed, address_item *addr, uschar *etext, uschar **errptr)
+transport_set_up_command(const uschar ***argvptr, uschar *cmd,
+ BOOL expand_arguments, int expand_failed, address_item *addr,
+ uschar *etext, uschar **errptr)
{
address_item *ad;
-uschar **argv;
+const uschar **argv;
uschar *s, *ss;
int address_count = 0;
int argcount = 0;
if (*s != 0) s++;
*ss++ = 0;
}
- else argv[argcount++] = string_dequote(&s);
+ else argv[argcount++] = string_copy(string_dequote(CUSS &s));
while (isspace(*s)) s++;
}
memmove(argv + i + 1 + additional, argv + i + 1,
(argcount - i)*sizeof(uschar *));
- for (ad = addr; ad != NULL; ad = ad->next) argv[i++] = ad->address;
+ for (ad = addr; ad != NULL; ad = ad->next) {
+ argv[i++] = ad->address;
+ argcount++;
+ }
+
+ /* Subtract one since we replace $pipe_addresses */
+ argcount--;
+ i--;
+ }
+
+ /* Handle special case of $address_pipe when af_force_command is set */
+
+ else if (addr != NULL && testflag(addr,af_force_command) &&
+ (Ustrcmp(argv[i], "$address_pipe") == 0 ||
+ Ustrcmp(argv[i], "${address_pipe}") == 0))
+ {
+ int address_pipe_i;
+ int address_pipe_argcount = 0;
+ int address_pipe_max_args;
+ uschar **address_pipe_argv;
+
+ /* We can never have more then the argv we will be loading into */
+ address_pipe_max_args = max_args - argcount + 1;
+
+ DEBUG(D_transport)
+ debug_printf("address_pipe_max_args=%d\n", address_pipe_max_args);
+
+ /* We allocate an additional for (uschar *)0 */
+ address_pipe_argv = store_get((address_pipe_max_args+1)*sizeof(uschar *));
+
+ /* +1 because addr->local_part[0] == '|' since af_force_command is set */
+ s = expand_string(addr->local_part + 1);
+
+ if (s == NULL || *s == '\0')
+ {
+ addr->transport_return = FAIL;
+ addr->message = string_sprintf("Expansion of \"%s\" "
+ "from command \"%s\" in %s failed: %s",
+ (addr->local_part + 1), cmd, etext, expand_string_message);
+ return FALSE;
+ }
+
+ while (isspace(*s)) s++; /* strip leading space */
+
+ while (*s != 0 && address_pipe_argcount < address_pipe_max_args)
+ {
+ if (*s == '\'')
+ {
+ ss = s + 1;
+ while (*ss != 0 && *ss != '\'') ss++;
+ address_pipe_argv[address_pipe_argcount++] = ss = store_get(ss - s++);
+ while (*s != 0 && *s != '\'') *ss++ = *s++;
+ if (*s != 0) s++;
+ *ss++ = 0;
+ }
+ else address_pipe_argv[address_pipe_argcount++] =
+ string_copy(string_dequote(CUSS &s));
+ while (isspace(*s)) s++; /* strip space after arg */
+ }
+
+ address_pipe_argv[address_pipe_argcount] = (uschar *)0;
+
+ /* If *s != 0 we have run out of argument slots. */
+ if (*s != 0)
+ {
+ uschar *msg = string_sprintf("Too many arguments in $address_pipe "
+ "\"%s\" in %s", addr->local_part + 1, etext);
+ if (addr != NULL)
+ {
+ addr->transport_return = FAIL;
+ addr->message = msg;
+ }
+ else *errptr = msg;
+ return FALSE;
+ }
+
+ /* address_pipe_argcount - 1
+ * because we are replacing $address_pipe in the argument list
+ * with the first thing it expands to */
+ if (argcount + address_pipe_argcount - 1 > max_args)
+ {
+ addr->transport_return = FAIL;
+ addr->message = string_sprintf("Too many arguments to command "
+ "\"%s\" after expanding $address_pipe in %s", cmd, etext);
+ return FALSE;
+ }
+
+ /* If we are not just able to replace the slot that contained
+ * $address_pipe (address_pipe_argcount == 1)
+ * We have to move the existing argv by address_pipe_argcount - 1
+ * Visually if address_pipe_argcount == 2:
+ * [argv 0][argv 1][argv 2($address_pipe)][argv 3][0]
+ * [argv 0][argv 1][ap_arg0][ap_arg1][old argv 3][0]
+ */
+ if (address_pipe_argcount > 1)
+ memmove(
+ /* current position + additonal args */
+ argv + i + address_pipe_argcount,
+ /* current position + 1 (for the (uschar *)0 at the end) */
+ argv + i + 1,
+ /* -1 for the (uschar *)0 at the end)*/
+ (argcount - i)*sizeof(uschar *)
+ );
+
+ /* Now we fill in the slots we just moved argv out of
+ * [argv 0][argv 1][argv 2=pipeargv[0]][argv 3=pipeargv[1]][old argv 3][0]
+ */
+ for (address_pipe_i = 0;
+ address_pipe_argv[address_pipe_i] != (uschar *)0;
+ address_pipe_i++)
+ {
+ argv[i++] = address_pipe_argv[address_pipe_i];
+ argcount++;
+ }
+
+ /* Subtract one since we replace $address_pipe */
+ argcount--;
i--;
}
else
{
- uschar *expanded_arg;
+ const uschar *expanded_arg;
enable_dollar_recipients = allow_dollar_recipients;
- expanded_arg = expand_string(argv[i]);
+ expanded_arg = expand_cstring(argv[i]);
enable_dollar_recipients = FALSE;
if (expanded_arg == NULL)
return TRUE;
}
+/* vi: aw ai sw=2
+*/
/* End of transport.c */
git://git.exim.org / exim.git / blobdiff