GETIPSECPROTOBYNAME(3NSL) Networking Services Library Functions


NAME


getipsecprotobyname, getipsecprotobynum - query IPsec protocols entries

SYNOPSIS


cc -flag ... file ...-lnsl [ -library ... ]
#include <netdb.h>


int getipsecprotobyname(const char *proto_name


char *getipsecprotobynum(int proto_nump


DESCRIPTION


Use the getipsecprotobyname() and getipsecprotobynum() functions to
obtain the IPsec algorithm mappings that are defined by ipsecalgs(1M).
You can also use the getipsecprotobyname() and getipsecprotobynum()
functions in conjunction with getipsecalgbyname(3NSL) and
getipsecalgbynum(3NSL) to obtain information about the supported IPsec
algorithms. The IPsec algorithms and associated protocol name spaces are
defined by RFC 2407.


getipsecprotobyname() takes as an argument the name of an IPsec protocol
and returns its assigned protocol number. The character string returned
by the getipsecprotobyname() function must be freed by the called when it
is no longer needed.


getipsecprotobynum() takes as an argument a protocol number and returns
the corresponding protocol name.


The following protocol numbers are pre-defined:

IPSEC_PROTO_ESP
Defines the encryption algorithms (transforms) that
can be used by IPsec to provide data confidentiality.


IPSEC_PROTO_AH
Defines the authentication algorithms (transforms)
that can be used by IPsec to provide authentication.


PARAMETERS


proto_name
A pointer to the name of an IPsec protocol.


proto_num
A pointer to a protocol number. conditions.


RETURN VALUES


The getipsecprotobyname() function returns a protocol number upon
success, or -1 if the protocol specified does not exist.


The getipsecprotobynum() function returns a protocol name upon success,
or the NULL value if the protocol number specified does not exist.

ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|MT Level | MT Safe |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+

SEE ALSO


ipsecalgs(1M), getipsecalgbyname(3NSL), getipsecalgbyname(3NSL),
attributes(5)


Piper, D. RFC 2407, The Internet IP Security Domain of Interpretation for
ISAKMP. Network Working Group. November, 1998.


August 13, 2003 GETIPSECPROTOBYNAME(3NSL)