void
u_new (void)
{
int i = 0, j = 0, len = 0;
struct udpclient *x = NULL;
static char *q = 0;
char qtype[2], qclass[2];
for (j = 0; j < MAXUDP; j++)
if (!u[j].active)
break;
if (j >= MAXUDP)
{
j = 0;
for (i = 1; i < MAXUDP; i++)
if (taia_less (&u[i].start, &u[j].start))
j = i;
errno = error_timeout;
u_drop (j);
}
x = u + j;
taia_now (&x->start);
len = socket_recv4 (udp53, buf, sizeof (buf), x->ip, &x->port, &odst);
if (len == -1)
return;
if ((unsigned)len >= sizeof buf)
return;
if (x->port < 1024 && x->port != 53)
return;
if (!okclient (x->ip))
return;
if (!packetquery (buf, len, &q, qtype, qclass, x->id))
return;
x->active = ++numqueries;
++uactive;
if (debug_level)
log_query (x->active, x->ip, x->port, x->id, q, qtype);
switch (query_start (&x->q, q, qtype, qclass, myipoutgoing))
{
case -1:
u_drop (j);
return;
case 1:
u_respond (j);
}
}
void u_new(void)
{
int j;
int i;
struct udpclient *x;
int len;
static char *q = 0;
char qtype[2];
char qclass[2];
for (j = 0;j < MAXUDP;++j)
if (!u[j].active)
break;
if (j >= MAXUDP) {
j = 0;
for (i = 1;i < MAXUDP;++i)
if (taia_less(&u[i].start,&u[j].start))
j = i;
errno = error_timeout;
u_drop(j);
}
x = u + j;
taia_now(&x->start);
len = socket_recv6(udp53,buf,sizeof buf,x->ip,&x->port,&x->scope_id);
if (len == -1) return;
if (len >= sizeof buf) return;
if (x->port < 1024) if (x->port != 53) return;
if (!okclient(x->ip)) return;
if (!packetquery(buf,len,&q,qtype,qclass,x->id)) return;
x->active = ++numqueries; ++uactive;
log_query(&x->active,x->ip,x->port,x->id,q,qtype);
switch(query_start(&x->q,q,qtype,qclass,myipoutgoing,interface)) {
case -1:
u_drop(j);
return;
case 1:
u_respond(j);
}
}
void
t_rw (int j)
{
int r;
char ch;
static char *q = 0;
char qtype[2], qclass[2];
struct tcpclient *x = NULL;
x = t + j;
if (x->state == -1)
{
r = write (x->tcp, x->buf + x->pos, x->len - x->pos);
if (r <= 0)
{
t_close (j);
return;
}
x->pos += r;
if (x->pos == x->len)
{
t_free (j);
x->state = 1; /* could drop connection immediately */
}
return;
}
r = read (x->tcp, &ch, 1);
if (r == 0)
{
errno = error_pipe;
t_close (j);
return;
}
if (r < 0)
{
t_close (j);
return;
}
if (x->state == 1)
{
x->len = (unsigned char)ch;
x->len <<= 8;
x->state = 2;
return;
}
if (x->state == 2)
{
x->len += (unsigned char)ch;
if (!x->len)
{
errno = error_proto;
t_close (j);
return;
}
x->buf = alloc (x->len);
if (!x->buf)
{
t_close(j);
return;
}
x->pos = 0;
x->state = 3;
return;
}
if (x->state != 3)
return; /* impossible */
x->buf[x->pos++] = ch;
if (x->pos < x->len)
return;
if (!packetquery (x->buf, x->len, &q, qtype, qclass, x->id))
{
t_close(j);
return;
}
x->active = ++numqueries;
if (debug_level)
log_query (x->active, x->ip, x->port, x->id, q, qtype);
switch (query_start (&x->q, q, qtype, qclass, myipoutgoing))
{
case -1:
t_drop (j);
return;
case 1:
t_respond (j);
return;
}
t_free (j);
x->state = 0;
}
