ne_set_server_auth, ne_set_proxy_auth, ne_forget_auth — register authentication callbacks
#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); |
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.
If you only wish to allow the user one attempt to enter
credentials, use the value of the attempt
parameter as the return value of the callback.
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.
/* 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);
/* ... */
}