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artiq/soc/runtime/moninj.c

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#include <generated/csr.h>
#ifdef CSR_ETHMAC_BASE
#include <netif/etharp.h>
#include <lwip/init.h>
#include <lwip/memp.h>
#include <lwip/ip4_addr.h>
#include <lwip/ip4.h>
#include <lwip/netif.h>
#include <lwip/sys.h>
#include <lwip/udp.h>
#include <lwip/timers.h>
#include "log.h"
#include "moninj.h"
enum {
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MONINJ_REQ_MONITOR = 1,
MONINJ_REQ_TTLSET = 2
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};
static struct udp_pcb *listen_pcb;
struct monitor_reply {
long long int ttl_levels;
long long int ttl_oes;
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long long int ttl_overrides;
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};
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static long long int ttl_overrides;
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static void moninj_monitor(const ip_addr_t *addr, u16_t port)
{
struct monitor_reply reply;
int i;
struct pbuf *reply_p;
reply.ttl_levels = 0;
reply.ttl_oes = 0;
for(i=0;i<RTIO_TTL_COUNT;i++) {
rtio_mon_chan_sel_write(i);
rtio_mon_probe_sel_write(0);
if(rtio_mon_probe_value_read())
reply.ttl_levels |= 1LL << i;
rtio_mon_probe_sel_write(1);
if(rtio_mon_probe_value_read())
reply.ttl_oes |= 1LL << i;
}
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reply.ttl_overrides = ttl_overrides;
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reply_p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct monitor_reply), PBUF_RAM);
if(!reply_p) {
log("Failed to allocate pbuf for monitor reply");
return;
}
memcpy(reply_p->payload, &reply, sizeof(struct monitor_reply));
udp_sendto(listen_pcb, reply_p, addr, port);
pbuf_free(reply_p);
}
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static void moninj_ttlset(int channel, int mode)
{
if(mode)
ttl_overrides |= (1LL << channel);
else
ttl_overrides &= ~(1LL << channel);
}
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static void moninj_recv(void *arg, struct udp_pcb *upcb, struct pbuf *req,
const ip_addr_t *addr, u16_t port)
{
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char *p = (char *)req->payload;
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if(req->len >= 1) {
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switch(p[0]) {
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case MONINJ_REQ_MONITOR:
moninj_monitor(addr, port);
break;
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case MONINJ_REQ_TTLSET:
if(req->len < 3)
break;
moninj_ttlset(p[1], p[2]);
break;
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default:
break;
}
}
pbuf_free(req); /* beware: addr may point into the req pbuf */
}
void moninj_init(void)
{
listen_pcb = udp_new();
if(!listen_pcb) {
log("Failed to create UDP listening PCB");
return;
}
udp_bind(listen_pcb, IP_ADDR_ANY, 3250);
udp_recv(listen_pcb, moninj_recv, NULL);
}
#endif /* CSR_ETHMAC_BASE */