-/* $Cambridge: exim/src/src/smtp_out.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2004 */
+/* Copyright (c) University of Cambridge 1995 - 2015 */
/* See the file NOTICE for conditions of use and distribution. */
/* A number of functions for driving outgoing SMTP calls. */
#include "exim.h"
+#include "transports/smtp.h"
smtp_get_interface(uschar *istring, int host_af, address_item *addr,
BOOL *changed, uschar **interface, uschar *msg)
{
-uschar *expint;
+const uschar * expint;
uschar *iface;
int sep = 0;
-/*************************************************
-* Connect to remote host *
-*************************************************/
-
-/* Create a socket, and connect it to a remote host. IPv6 addresses are
-detected by checking for a colon in the address. AF_INET6 is defined even on
-non-IPv6 systems, to enable the code to be less messy. However, on such systems
-host->address will always be an IPv4 address.
-
-The port field in the host item is used if it is set (usually router from SRV
-records). In other cases, the default passed as an argument is used.
-
-Arguments:
- host host item containing name and address (and sometimes port)
- host_af AF_INET or AF_INET6
- port default, remote port to connect to, in host byte order for those
- hosts whose port setting is PORT_NONE
- interface outgoing interface address or NULL
- timeout timeout value or 0
- keepalive TRUE to use keepalive
-
-Returns: connected socket number, or -1 with errno set
-*/
-
int
-smtp_connect(host_item *host, int host_af, int port, uschar *interface,
- int timeout, BOOL keepalive)
+smtp_sock_connect(host_item * host, int host_af, int port, uschar * interface,
+ transport_instance * tb, int timeout)
{
+smtp_transport_options_block * ob =
+ (smtp_transport_options_block *)tb->options_block;
+const uschar * dscp = ob->dscp;
+int dscp_value;
+int dscp_level;
+int dscp_option;
+int sock;
int on = 1;
int save_errno = 0;
-int sock;
-if (host->port != PORT_NONE)
- {
- HDEBUG(D_transport|D_acl|D_v)
- debug_printf("Transport port=%d replaced by host-specific port=%d\n", port,
- host->port);
- port = host->port;
- }
-
-HDEBUG(D_transport|D_acl|D_v)
- {
- if (interface == NULL)
- debug_printf("Connecting to %s [%s]:%d ... ",host->name,host->address,port);
- else
- debug_printf("Connecting to %s [%s]:%d from %s ... ", host->name,
- host->address, port, interface);
- }
-
-/* Create the socket */
+#ifdef EXPERIMENTAL_EVENT
+deliver_host_address = host->address;
+deliver_host_port = port;
+if (event_raise(tb->event_action, US"tcp:connect", NULL)) return -1;
+#endif
if ((sock = ip_socket(SOCK_STREAM, host_af)) < 0) return -1;
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (uschar *)(&on), sizeof(on));
+/* Set DSCP value, if we can. For now, if we fail to set the value, we don't
+bomb out, just log it and continue in default traffic class. */
+
+if (dscp && dscp_lookup(dscp, host_af, &dscp_level, &dscp_option, &dscp_value))
+ {
+ HDEBUG(D_transport|D_acl|D_v)
+ debug_printf("DSCP \"%s\"=%x ", dscp, dscp_value);
+ if (setsockopt(sock, dscp_level, dscp_option, &dscp_value, sizeof(dscp_value)) < 0)
+ HDEBUG(D_transport|D_acl|D_v)
+ debug_printf("failed to set DSCP: %s ", strerror(errno));
+ /* If the kernel supports IPv4 and IPv6 on an IPv6 socket, we need to set the
+ option for both; ignore failures here */
+ if (host_af == AF_INET6 &&
+ dscp_lookup(dscp, AF_INET, &dscp_level, &dscp_option, &dscp_value))
+ (void) setsockopt(sock, dscp_level, dscp_option, &dscp_value, sizeof(dscp_value));
+ }
+
/* Bind to a specific interface if requested. Caller must ensure the interface
is the same type (IPv4 or IPv6) as the outgoing address. */
-if (interface != NULL && ip_bind(sock, host_af, interface, 0) < 0)
+if (interface && ip_bind(sock, host_af, interface, 0) < 0)
{
save_errno = errno;
HDEBUG(D_transport|D_acl|D_v)
if (save_errno != 0)
{
- HDEBUG(D_transport|D_acl|D_v) debug_printf("failed\n");
- close(sock);
+ HDEBUG(D_transport|D_acl|D_v)
+ {
+ debug_printf("failed: %s", CUstrerror(save_errno));
+ if (save_errno == ETIMEDOUT)
+ debug_printf(" (timeout=%s)", readconf_printtime(timeout));
+ debug_printf("\n");
+ }
+ (void)close(sock);
errno = save_errno;
return -1;
}
else
{
+ union sockaddr_46 interface_sock;
+ EXIM_SOCKLEN_T size = sizeof(interface_sock);
HDEBUG(D_transport|D_acl|D_v) debug_printf("connected\n");
- if (keepalive) ip_keepalive(sock, host->address, TRUE);
+ if (getsockname(sock, (struct sockaddr *)(&interface_sock), &size) == 0)
+ sending_ip_address = host_ntoa(-1, &interface_sock, NULL, &sending_port);
+ else
+ {
+ log_write(0, LOG_MAIN | ((errno == ECONNRESET)? 0 : LOG_PANIC),
+ "getsockname() failed: %s", strerror(errno));
+ close(sock);
+ return -1;
+ }
+ if (ob->keepalive) ip_keepalive(sock, host->address, TRUE);
return sock;
}
}
+/*************************************************
+* Connect to remote host *
+*************************************************/
+
+/* Create a socket, and connect it to a remote host. IPv6 addresses are
+detected by checking for a colon in the address. AF_INET6 is defined even on
+non-IPv6 systems, to enable the code to be less messy. However, on such systems
+host->address will always be an IPv4 address.
+
+The port field in the host item is used if it is set (usually router from SRV
+records or elsewhere). In other cases, the default passed as an argument is
+used, and the host item is updated with its value.
+
+Arguments:
+ host host item containing name and address (and sometimes port)
+ host_af AF_INET or AF_INET6
+ port default remote port to connect to, in host byte order, for those
+ hosts whose port setting is PORT_NONE
+ interface outgoing interface address or NULL
+ timeout timeout value or 0
+ tb transport
+
+Returns: connected socket number, or -1 with errno set
+*/
+
+int
+smtp_connect(host_item *host, int host_af, int port, uschar *interface,
+ int timeout, transport_instance * tb)
+{
+smtp_transport_options_block * ob =
+ (smtp_transport_options_block *)tb->options_block;
+
+if (host->port != PORT_NONE)
+ {
+ HDEBUG(D_transport|D_acl|D_v)
+ debug_printf("Transport port=%d replaced by host-specific port=%d\n", port,
+ host->port);
+ port = host->port;
+ }
+else host->port = port; /* Set the port actually used */
+
+HDEBUG(D_transport|D_acl|D_v)
+ {
+ uschar * s = US" ";
+ if (interface) s = string_sprintf(" from %s ", interface);
+#ifdef EXPERIMENTAL_SOCKS
+ if (ob->socks_proxy) s = string_sprintf("%svia proxy ", s);
+#endif
+ debug_printf("Connecting to %s [%s]:%d%s... ",
+ host->name, host->address, port, s);
+ }
+
+/* Create and connect the socket */
+
+#ifdef EXPERIMENTAL_SOCKS
+if (ob->socks_proxy)
+ return socks_sock_connect(host, host_af, port, interface, tb, timeout);
+#endif
+
+return smtp_sock_connect(host, host_af, port, interface, tb, timeout);
+}
+
/*************************************************
* Flush outgoing command buffer *
int rc;
#ifdef SUPPORT_TLS
-if (tls_active == outblock->sock)
- rc = tls_write(outblock->buffer, outblock->ptr - outblock->buffer);
+if (tls_out.active == outblock->sock)
+ rc = tls_write(FALSE, outblock->buffer, outblock->ptr - outblock->buffer);
else
#endif
*/
int
-smtp_write_command(smtp_outblock *outblock, BOOL noflush, char *format, ...)
+smtp_write_command(smtp_outblock *outblock, BOOL noflush, const char *format, ...)
{
int count;
int rc = 0;
va_end(ap);
count = Ustrlen(big_buffer);
+if (count > outblock->buffersize)
+ log_write(0, LOG_MAIN|LOG_PANIC_DIE, "overlong write_command in outgoing "
+ "SMTP");
+
if (count > outblock->buffersize - (outblock->ptr - outblock->buffer))
{
rc = outblock->cmd_count; /* flush resets */
}
/* End of smtp_out.c */
+/* vi: aw ai sw=2
+*/
git://git.exim.org / users / heiko / exim.git / blobdiff