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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "log.h"
#include "radius_p.h"
static int urandom_fd;
static int rad_req_read(struct triton_md_handler_t *h);
static void rad_req_timeout(struct triton_timer_t *t);
struct rad_req_t *rad_req_alloc(struct radius_pd_t *rpd, int code, const char *username)
{
struct rad_req_t *req = malloc(sizeof(*req));
if (!req)
return NULL;
memset(req, 0, sizeof(*req));
req->rpd = rpd;
req->hnd.fd = -1;
req->ctx.before_switch = log_switch;
req->server_name = conf_auth_server;
req->server_port = conf_auth_server_port;
while (1) {
if (read(urandom_fd, req->RA, 16) != 16) {
if (errno == EINTR)
continue;
log_ppp_error("radius:req:read urandom: %s\n", strerror(errno));
goto out_err;
}
break;
}
req->pack = rad_packet_alloc(code);
if (!req->pack)
goto out_err;
if (rad_packet_add_str(req->pack, "User-Name", username, strlen(username)))
goto out_err;
if (conf_nas_identifier)
if (rad_packet_add_str(req->pack, "NAS-Identifier", conf_nas_identifier, strlen(conf_nas_identifier)))
goto out_err;
if (rad_packet_add_int(req->pack, "NAS-Port", rpd->ppp->unit_idx))
goto out_err;
if (rad_packet_add_val(req->pack, "NAS-Port-Type", "Virtual"))
goto out_err;
if (rad_packet_add_val(req->pack, "Service-Type", "Framed-User"))
goto out_err;
if (rad_packet_add_val(req->pack, "Framed-Protocol", "PPP"))
goto out_err;
return req;
out_err:
rad_req_free(req);
return NULL;
}
int rad_req_acct_fill(struct rad_req_t *req)
{
req->server_name = conf_acct_server;
req->server_port = conf_acct_server_port;
memset(req->RA, 0, sizeof(req->RA));
if (rad_packet_add_val(req->pack, "Acct-Authentic", "RADIUS"))
return -1;
if (rad_packet_add_val(req->pack, "Acct-Status-Type", "Start"))
return -1;
if (rad_packet_add_str(req->pack, "Acct-Session-Id", req->rpd->ppp->sessionid, PPP_SESSIONID_LEN))
return -1;
if (rad_packet_add_int(req->pack, "Acct-Session-Time", 0))
return -1;
if (rad_packet_add_int(req->pack, "Acct-Input-Octets", 0))
return -1;
if (rad_packet_add_int(req->pack, "Acct-Output-Octets", 0))
return -1;
if (rad_packet_add_int(req->pack, "Acct-Input-Packets", 0))
return -1;
if (rad_packet_add_int(req->pack, "Acct-Output-Packets", 0))
return -1;
return 0;
}
void rad_req_free(struct rad_req_t *req)
{
if (req->hnd.fd >= 0 )
close(req->hnd.fd);
if (req->pack)
rad_packet_free(req->pack);
if (req->reply)
rad_packet_free(req->reply);
free(req);
}
static int make_socket(struct rad_req_t *req)
{
struct sockaddr_in addr;
req->hnd.fd = socket(PF_INET, SOCK_DGRAM, 0);
if (req->hnd.fd < 0) {
log_ppp_error("radius:socket: %s\n", strerror(errno));
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
if (conf_nas_ip_address) {
addr.sin_addr.s_addr = inet_addr(conf_nas_ip_address);
if (bind(req->hnd.fd, (struct sockaddr *) &addr, sizeof(addr))) {
log_ppp_error("radius:bind: %s\n", strerror(errno));
goto out_err;
}
}
addr.sin_addr.s_addr = inet_addr(req->server_name);
addr.sin_port = htons(req->server_port);
if (connect(req->hnd.fd, (struct sockaddr *) &addr, sizeof(addr))) {
log_ppp_error("radius:connect: %s\n", strerror(errno));
goto out_err;
}
if (fcntl(req->hnd.fd, F_SETFL, O_NONBLOCK)) {
log_ppp_error("radius: failed to set nonblocking mode: %s\n", strerror(errno));
goto out_err;
}
return 0;
out_err:
close(req->hnd.fd);
req->hnd.fd = -1;
return -1;
}
int rad_req_send(struct rad_req_t *req)
{
if (req->hnd.fd == -1 && make_socket(req))
return -1;
if (!req->pack->buf && rad_packet_build(req->pack, req->RA))
goto out_err;
if (conf_verbose) {
log_ppp_debug("send ");
rad_packet_print(req->pack, log_ppp_debug);
}
rad_packet_send(req->pack, req->hnd.fd, NULL);
return 0;
out_err:
close(req->hnd.fd);
req->hnd.fd = -1;
return -1;
}
static void req_wakeup(struct rad_req_t *req)
{
triton_context_wakeup(req->rpd->ppp->ctrl->ctx);
triton_timer_del(&req->timeout);
triton_md_unregister_handler(&req->hnd);
triton_context_unregister(&req->ctx);
}
static int rad_req_read(struct triton_md_handler_t *h)
{
struct rad_req_t *req = container_of(h, typeof(*req), hnd);
req->reply = rad_packet_recv(h->fd, NULL);
req_wakeup(req);
return 0;
}
static void rad_req_timeout(struct triton_timer_t *t)
{
struct rad_req_t *req = container_of(t, typeof(*req), timeout);
req_wakeup(req);
}
int rad_req_wait(struct rad_req_t *req, int timeout)
{
req->hnd.read = rad_req_read;
req->timeout.expire = rad_req_timeout;
triton_context_register(&req->ctx, req->rpd->ppp);
triton_md_register_handler(&req->ctx, &req->hnd);
if (triton_md_enable_handler(&req->hnd, MD_MODE_READ))
return -1;
req->timeout.period = timeout * 1000;
if (triton_timer_add(&req->ctx, &req->timeout, 0))
return -1;
triton_context_schedule(req->rpd->ppp->ctrl->ctx);
if (conf_verbose && req->reply) {
log_ppp_debug("recv ");
rad_packet_print(req->reply, log_ppp_debug);
}
return 0;
}
void __init req_init(void)
{
urandom_fd = open("/dev/urandom", O_RDONLY);
if (!urandom_fd) {
perror("radius:req: open /dev/urandom");
_exit(EXIT_FAILURE);
}
}
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