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/** @file libradsec-minimal.h
@brief Low level API for libradsec. */
/* FIXME: License blurb goes here. */
#include "libevent.h"
/* Example usage. */
#if 0
{
fd = rs_connect (address, 0, NULL);
if (!fd)
/* check errno */ ;
n = read (fd, buf, buflen);
struct rs_packet *p = rs_packet_new (buf, buflen, &count);
if (!p)
{
if (count < 0)
/* check errno */ ;
else
/* need another COUNT octets */ ;
}
else
/* next unused octet is at buf+count */
n = rs_packet_serialize (p, buf, buflen);
if (n < 0)
/* invalid packet */ ;
else if (n == 0)
/* out of buffer space */ ;
else
write (fd, buf, n);
if (p)
rs_packet_free(p);
if (fd)
rs_disconnect(fd);
}
#endif
/* Function prototypes. */
/** Establish a connection.
@param type Connection type.
@param addr Network address to connect to.
@param cred Credentials, or NULL.
@return A file descriptor or -1 if an error occurred, in which
case errno is set appropriately. */
int rs_connect(const struct sockaddr_storage *addr,
enum rs_conn_type type,
const struct rs_credentials *cred);
/** Disconnect.
@param fd File descriptor to close.
@return 0 on success or -1 if an error occurred, in which case
errno is set appropriately. */
int rs_disconnect(int fd);
/** Allocate and initialize a packet from a buffer containing a packet
as seen on the wire. Free the packet using @a rs_packet_free().
@param buf Buffer with on-the-wire data with packet.
@param buflen Number of octets in @a buf.
@param count Number of octets used in buffer, in case of
successful construction of a packet (return !NULL) or number of
octets needed for a complete packet (return NULL).
@return Packet or NULL on error or not enough data in @a buf. If
return value is NULL and @a count is < 0, an error has occurred
and errno is set appropriately. If return value is NULL and @a
count is > 0 it shows the number of bytes needed to complete the
packet. */
struct rs_packet *rs_packet_new(const uint8_t *buf,
size_t buflen,
ssize_t *count);
/** Free a packet that has been allocated by @a rs_packet_new().
@param packet Packet to free. */
void rs_packet_free(struct rs_packet *packet);
/** Serialize a packet.
@param packet Packet to serialize.
@param buf Buffer to store the serialized packet in.
@param buflen Length of buffer.
@return Number of bytes written to buf or 0 if the buffer wasn't
large enough to hold the packet or < 0 in case the packet couldn't
be serialized for some other eason (FIXME: elaborate) */
ssize_t rs_packet_serialize(const struct rs_packet *packet,
uint8_t *buf,
size_t buflen);
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