static int ol_tcp_acc_set_opts(outlet_t *ol, uint8_t *data, int dlen)
{
uint8_t *p = data;
int left = dlen;
while (left > 0)
{
int opt = *p++;
left--;
if (left < 4)
return -BAD_ARG;
uint32_t val = GET_UINT_32(p);
p += 4;
left -= 4;
switch (opt)
{
case INET_OPT_PRIORITY:
//
// There is a priority setting in a PCB. It is always set to high
// value to avoid closing of open connections when the stack runs
// out of memory. Thus the option is ignored.
//
//printk("tcp_set_opts: unsupported option SO_PRIORITY ignored\n");
break;
#if LING_WITH_LWIP
case INET_OPT_TOS:
ol->tcp->tos = (uint8_t)val;
break;
#endif
case TCP_OPT_NODELAY:
//
// Nagle's algo fights silly window syndrome. What is its
// relationship to not delaying send?
//
ol_tcp_set_nodelay(ol, val);
break;
default:
if (inet_set_opt(ol, opt, val) < 0)
return -BAD_ARG;
}
}
return 0;
}
static int ol_tcp_set_opts(outlet_t *ol, uint8_t *data, int dlen)
{
uint8_t *p = data;
int left = dlen;
int saved_active = ol->active;
while (left > 0)
{
int opt = *p++;
left--;
if (left < 4)
return -BAD_ARG;
uint32_t val = GET_UINT_32(p);
p += 4;
left -= 4;
switch (opt)
{
case INET_OPT_RCVBUF:
if (val >= 0x80000000)
return -BAD_ARG;
if (val > ol->max_recv_bufsize)
{
memnode_t *node = nalloc_N(val);
if (node == 0)
{
// We may return -NO_MEMORY here; a more conservative
// approach is to ignore the option and continue
printk("ol_tcp_set_opts: cannot expand recv_buffer to %d byte(s)\n", val);
continue;
}
ol->recv_bufsize = val;
assert(ol->recv_buf_off <= ol->recv_bufsize); // no truncation
memcpy(node->starts, ol->recv_buffer, ol->recv_buf_off);
ol->max_recv_bufsize = (void *)node->ends -(void *)node->starts;
ol->recv_buffer = (uint8_t *)node->starts;
nfree(ol->recv_buf_node);
ol->recv_buf_node = node;
// ol->recv_buf_off stays the same
}
else
ol->recv_bufsize = val;
break;
case INET_OPT_PRIORITY:
//
// There is a priority setting in a PCB. It is always set to high
// value to avoid closing of open connections when the stack runs
// out of memory. Thus the option is ignored.
//
//printk("tcp_set_opts: unsupported option SO_PRIORITY ignored\n");
break;
case INET_OPT_TOS:
ol->tcp->tos = (uint8_t)val;
break;
case TCP_OPT_NODELAY:
//
// Nagle's algo fights silly window syndrome. What is its
// relationship to not delaying send?
//
if (val)
tcp_nagle_disable(ol->tcp);
else
tcp_nagle_enable(ol->tcp);
break;
default:
if (inet_set_opt(ol, opt, val) < 0)
return -BAD_ARG;
}
}
//
// If 'active' option was set among other options, then act immediately to
// deliver a buffered packet, if any.
//
if (saved_active == INET_PASSIVE && ol->active != INET_PASSIVE)
{
proc_t *cont_proc = scheduler_lookup(ol->owner);
assert(cont_proc != 0);
recv_bake_packets(ol, cont_proc);
}
return 0;
}