conn.c File Reference

functions for establishing connection to remote SMTP server More...

#include <qremote/conn.h>
#include <control.h>
#include <log.h>
#include <netio.h>
#include <qdns.h>
#include <qremote/client.h>
#include <qremote/qremote.h>
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <string.h>
#include <sys/socket.h>
#include <syslog.h>
#include <unistd.h>

Macros
#define	SOCK_CLOEXEC   0

Functions
static int	conn (const struct in6_addr remoteip, const struct in6_addr *outip)
	create a socket and connect to the given ip More...
int	tryconn (struct ips *mx, const struct in6_addr *outip4, const struct in6_addr *outip6)
void	getmxlist (char *remhost, struct ips **mx)

Variables
unsigned int	targetport = 25

Detailed Description

functions for establishing connection to remote SMTP server

Function Documentation

static int conn ( const struct in6_addr  remoteip, const struct in6_addr *  outip  )

static

create a socket and connect to the given ip

Parameters

remoteip	the target address
outip	the local IP the connection should originate from

Returns

the socket descriptor or a negative error code

void getmxlist	(	char *	remhost,
		struct ips **	mx
	)

get all IPs for the MX entries of target address

Parameters

remhost	target address
mx	list of MX entries will be stored here, memory will be malloced

int tryconn	(	struct ips *	mx,
		const struct in6_addr *	outip4,
		const struct in6_addr *	outip6
	)

try to estabish an SMTP connection to one of the hosts in the ip list

Parameters

mx	list of IP adresses to try
outip4	local IPv4 to bind
outip6	local IPv6 to bind

Returns

the socket descriptor of the open connection

Return values

-ENOENT

no IP address left to connect to

Every entry where a connection attempt was made is marked with a priority of MX_PRIORITY_USED, the last one tried with MX_PRIORITY_CURRENT.

Variable Documentation

unsigned int targetport = 25

the port on the destination host to connect to