#include "globals.h"

static int32_t radegast_send(struct s_client * client, uchar *buf)

{

int32_t l=buf[1]+2;

return(send(client->pfd, buf, l, 0));

}

static int32_t radegast_recv(struct s_client *client, uchar *buf, int32_t l)

{

int32_t n;

if (!client->pfd) return(-1);

if (client->typ == 'c') { // server code

if ((n=recv(client->pfd, buf, l, 0))>0)

client->last=time((time_t *) 0);

} else { // client code

if ((n=recv(client->pfd, buf, l, 0))>0) {

cs_ddump_mask(D_CLIENT, buf, n, "radegast: received %d bytes from %s", n, remote_txt());

client->last = time((time_t *) 0);

if (buf[0] == 2) { // dcw received

if (buf[3] != 0x10) { // dcw ok

cs_log("radegast: no dcw");

n = -1;

}

}

}

}

return(n);

}

static int32_t radegast_recv_chk(struct s_client *client, uchar *dcw, int32_t *rc, uchar *buf, int32_t UNUSED(n))

{

if ((buf[0] == 2) && (buf[1] == 0x12)) {

tmp_dbg(33);

memcpy(dcw, buf+4, 16);

cs_debug_mask(D_CLIENT, "radegast: recv chk - %s", cs_hexdump(0, dcw, 16, tmp_dbg, sizeof(tmp_dbg)));

*rc = 1;

return(client->reader->msg_idx);

}

return (-1);

}

static void radegast_auth_client(in_addr_t ip)

{

int32_t ok;

struct s_auth *account;

ok = check_ip(cfg.rad_allowed, ip);

if (!ok)

{

cs_auth_client(cur_client(), (struct s_auth *)0, NULL);

cs_exit(0);

}

for (ok=0, account=cfg.account; (cfg.rad_usr[0]) && (account) && (!ok); account=account->next)

{

ok=(!strcmp(cfg.rad_usr, account->usr));

if (ok && cs_auth_client(cur_client(), account, NULL))

cs_exit(0);

}

if (!ok)

cs_auth_client(cur_client(), (struct s_auth *)(-1), NULL);

}

static int32_t get_request(uchar *buf)

{

int32_t n, rc=0;

if ((n=process_input(buf, 2, cfg.cmaxidle))==2)

{

if ((n=process_input(buf+2, buf[1], 0))>=0)

n+=2;

if (n-2==buf[1])

rc=n;

else

cs_log("WARNING: protocol error (garbage)");

}

if (n>0)

{

cs_ddump_mask(D_CLIENT, buf, n, "received %d bytes from client", n);

}

return(rc);

}

static void radegast_send_dcw(struct s_client *client, ECM_REQUEST *er)

{

uchar mbuf[1024];

mbuf[0]=0x02; // DCW

if (er->rc < E_NOTFOUND)

{

mbuf[1]=0x12; // len (overall)

mbuf[2]=0x05; // ACCESS

mbuf[3]=0x10; // len

memcpy(mbuf+4, er->cw, 16);

}

else

{

mbuf[1]=0x02; // len (overall)

mbuf[2]=0x04; // NO ACCESS

mbuf[3]=0x00; // len

}

radegast_send(client, mbuf);

}

static void radegast_process_ecm(uchar *buf, int32_t l)

{

int32_t i, n, sl;

ECM_REQUEST *er;

if (!(er=get_ecmtask()))

return;

for (i=0; i<l; i+=(sl+2))

{

sl=buf[i+1];

switch(buf[i])

{

case 2: // CAID (upper byte only, oldstyle)

er->caid=buf[i+2]<<8;

break;

case 10: // CAID

er->caid=b2i(2, buf+i+2);

break;

case 3: // ECM DATA

er->l=sl;

memcpy(er->ecm, buf+i+2, er->l);

break;

case 6: // PROVID (ASCII)

n=(sl>6) ? 3 : (sl>>1);

er->prid=cs_atoi((char *) buf+i+2+sl-(n<<1), n, 0);

break;

case 7: // KEYNR (ASCII), not needed

break;

case 8: // ECM PROCESS PID ?? don't know, not needed

break;

}

}

if (l!=i)

cs_log("WARNING: ECM-request corrupt");

else

get_cw(cur_client(), er);

}

static void radegast_process_unknown(uchar *buf)

{

uchar answer[2]={0x81, 0x00};

radegast_send(cur_client(), answer);

cs_log("unknown request %02X, len=%d", buf[0], buf[1]);

}

static void * radegast_server(void *cli)

{

int32_t n;

uchar mbuf[1024];

struct s_client * client = (struct s_client *) cli;

client->thread=pthread_self();

pthread_setspecific(getclient, cli);

radegast_auth_client(cur_client()->ip);

while ((n=get_request(mbuf))>0)

{

switch(mbuf[0])

{

case 1:

radegast_process_ecm(mbuf+2, mbuf[1]);

break;

default:

radegast_process_unknown(mbuf);

}

}

cs_disconnect_client(client);

return NULL;

}

static int32_t radegast_send_ecm(struct s_client *client, ECM_REQUEST *er, uchar *UNUSED(buf))

{

int32_t n;

uchar provid_buf[8];

uchar header[22] = "\x02\x01\x00\x06\x08\x30\x30\x30\x30\x30\x30\x30\x30\x07\x04\x30\x30\x30\x38\x08\x01\x02";

uchar *ecmbuf;

if(!cs_malloc(&ecmbuf,er->l + 30, -1)) return -1;

ecmbuf[0] = 1;

ecmbuf[1] = er->l + 30 - 2;

memcpy(ecmbuf + 2, header, sizeof(header));

for(n = 0; n < 4; n++) {

snprintf((char*)provid_buf+(n*2), sizeof(provid_buf)-(n*2), "%02X", ((uchar *)(&er->prid))[4 - 1 - n]);

}

ecmbuf[7] = provid_buf[0];

ecmbuf[8] = provid_buf[1];

ecmbuf[9] = provid_buf[2];

ecmbuf[10] = provid_buf[3];

ecmbuf[11] = provid_buf[4];

ecmbuf[12] = provid_buf[5];

ecmbuf[13] = provid_buf[6];

ecmbuf[14] = provid_buf[7];

ecmbuf[2 + sizeof(header)] = 0xa;

ecmbuf[3 + sizeof(header)] = 2;

ecmbuf[4 + sizeof(header)] = er->caid >> 8;

ecmbuf[5 + sizeof(header)] = er->caid & 0xff;

ecmbuf[6 + sizeof(header)] = 3;

ecmbuf[7 + sizeof(header)] = er->l;

memcpy(ecmbuf + 8 + sizeof(header), er->ecm, er->l);

ecmbuf[4] = er->caid >> 8;

client->reader->msg_idx = er->idx;

n = send(client->pfd, ecmbuf, er->l + 30, 0);

cs_log("radegast: sending ecm");

cs_ddump_mask(D_CLIENT, ecmbuf, er->l + 30, "ecm:");

free(ecmbuf);

return 0;

}

int32_t radegast_cli_init(struct s_client *cl)

{

*cl = *cl; //prevent compiler warning

struct sockaddr_in loc_sa;

int32_t handle;

cur_client()->pfd=0;

if (cur_client()->reader->r_port<=0)

{

cs_log("radegast: invalid port %d for server %s", cur_client()->reader->r_port, cur_client()->reader->device);

return(1);

}

cur_client()->ip=0;

memset((char *)&loc_sa,0,sizeof(loc_sa));

loc_sa.sin_family = AF_INET;

#ifdef LALL

if (cfg.serverip[0])

loc_sa.sin_addr.s_addr = inet_addr(cfg.serverip);

else

#endif

loc_sa.sin_addr.s_addr = INADDR_ANY;

loc_sa.sin_port = htons(cur_client()->reader->l_port);

if ((cur_client()->udp_fd=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))<0)

{

cs_log("radegast: Socket creation failed (errno=%d %s)", errno, strerror(errno));

cs_exit(1);

}

#ifdef SO_PRIORITY

if (cfg.netprio)

setsockopt(cur_client()->udp_fd, SOL_SOCKET, SO_PRIORITY,

(void *)&cfg.netprio, sizeof(uintptr_t));

#endif

if (!cur_client()->reader->tcp_ito) {

uint32_t keep_alive = cur_client()->reader->tcp_ito?1:0;

setsockopt(cur_client()->udp_fd, SOL_SOCKET, SO_KEEPALIVE,

(void *)&keep_alive, sizeof(uintptr_t));

}

memset((char *)&cur_client()->udp_sa,0,sizeof(cur_client()->udp_sa));

cur_client()->udp_sa.sin_family = AF_INET;

cur_client()->udp_sa.sin_port = htons((uint16_t)cur_client()->reader->r_port);

cs_log("radegast: proxy %s:%d (fd=%d)",

cur_client()->reader->device, cur_client()->reader->r_port, cur_client()->udp_fd);

handle = network_tcp_connection_open();

if(handle < 0) return -1;

cur_client()->reader->tcp_connected = 2;

cur_client()->reader->card_status = CARD_INSERTED;

cur_client()->reader->last_g = cur_client()->reader->last_s = time((time_t *)0);

cs_debug_mask(D_CLIENT, "radegast: last_s=%d, last_g=%d", cur_client()->reader->last_s, cur_client()->reader->last_g);

cur_client()->pfd=cur_client()->udp_fd;

return(0);

}

void module_radegast(struct s_module *ph)

{

static PTAB ptab; //since there is always only 1 radegast server running, this is threadsafe

ptab.ports[0].s_port = cfg.rad_port;

ph->ptab = &ptab;

ph->ptab->nports = 1;

cs_strncpy(ph->desc, "radegast", sizeof(ph->desc));

ph->type=MOD_CONN_TCP;

ph->listenertype = LIS_RADEGAST;

ph->multi=0;

ph->watchdog=1;

ph->s_ip=cfg.rad_srvip;

ph->s_handler=radegast_server;

ph->recv=radegast_recv;

ph->send_dcw=radegast_send_dcw;

ph->c_multi=0;

ph->c_init=radegast_cli_init;

ph->c_recv_chk=radegast_recv_chk;

ph->c_send_ecm=radegast_send_ecm;

ph->num=R_RADEGAST;

}