NAME

ne_set_server_auth, ne_set_proxy_auth, ne_forget_auth - register authentication callbacks

SYNOPSIS

#include <ne_auth.h>

typedef int (*ne_auth_creds)(void *userdata, const char *realm, int attempt, char *username, char *password);

void ne_set_server_auth(ne_session *session, ne_auth_creds callback, void *userdata);

void ne_set_proxy_auth(ne_session *session, ne_auth_creds callback, void *userdata);

void ne_forget_auth(ne_session *session);

DESCRIPTION

The ne_auth_creds function type defines a callback which is invoked when a server or proxy server requires user authentication for a particular request. The realm string is supplied by the server. The attempt is a counter giving the number of times the request has been retried with different authentication credentials. The first time the callback is invoked for a particular request, attempt will be zero.

To retry the request using new authentication credentials, the callback should return zero, and the username and password buffers must contain NUL-terminated strings. The NE_ABUFSIZ constant gives the size of these buffers.

To abort the request, the callback should return a non-zero value; in which case the contents of the username and password buffers are ignored.

The ne_forget_auth function can be used to discard the cached authentication credentials.

EXAMPLES

/* Function which prompts for a line of user input: */
extern char *prompt_for(const char *prompt);
static int
my_auth(void *userdata, const char *realm, int attempts,


        char *username, char *password)
{


   strncpy(username, prompt_for("Username: "), NE_ABUFSIZ);


   strncpy(password, prompt_for("Password: "), NE_ABUFSIZ);


   return attempts;
}
int main(...)
{


   ne_session *sess = ne_session_create(...);


   ne_set_server_auth(sess, my_auth, NULL);


   /* ... */
}

AUTHOR

Joe Orton <neon@lists.manyfish.co.uk>

COPYRIGHT