task_net.cc File Reference

#include "xcom/xcom_profile.h"
#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <cassert>
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include "xcom/simset.h"
#include "xcom/task.h"
#include "xcom/task_debug.h"
#include "xcom/task_os.h"
#include "xcom/x_platform.h"
#include "xcom/xcom_memory.h"
#include "xdr_gen/xcom_vp.h"

Classes
struct	infonode

Macros
#define	STRING_PORT_SIZE   6
#define	NR_GETADDRINFO_ATTEMPTS   10

Typedefs
typedef struct infonode	infonode

Functions
int	checked_getaddrinfo (const char *nodename, const char *servname, const struct addrinfo *hints, struct addrinfo **res)
	Wrapper function which retries and checks errors from getaddrinfo. More...
int	checked_getaddrinfo_port (const char *nodename, xcom_port port, const struct addrinfo *hints, struct addrinfo **res)
	Wrapper function to checked_getaddrinfo that accepts a numeric port. More...
void	deinit_network_cache ()
int	init_net ()
int	deinit_net ()

Macro Definition Documentation

NR_GETADDRINFO_ATTEMPTS

#define NR_GETADDRINFO_ATTEMPTS   10

STRING_PORT_SIZE

#define STRING_PORT_SIZE   6

Typedef Documentation

infonode

typedef struct infonode infonode

Function Documentation

checked_getaddrinfo()

int checked_getaddrinfo	(	const char *	nodename,
		const char *	servname,
		const struct addrinfo *	hints,
		struct addrinfo **	res
	)

Wrapper function which retries and checks errors from getaddrinfo.

We have observed that getaddrinfo returns EAI_AGAIN when called with an unresolvable hostname on systems using systemd-resolved for DNS resolution. Therefore, we only attempt to resolve nodename up to NR_GETADDRINFO_ATTEMPTS times, to avoid getting stuck in an infinite loop.

checked_getaddrinfo_port()

int checked_getaddrinfo_port	(	const char *	nodename,
		xcom_port	port,
		const struct addrinfo *	hints,
		struct addrinfo **	res
	)

Wrapper function to checked_getaddrinfo that accepts a numeric port.

deinit_net()

int deinit_net

(

)

deinit_network_cache()

void deinit_network_cache

(

)

init_net()

int init_net

(

)