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Flock: telnet request sends the request

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This commit is contained in:
Maria Matejka 2024-09-10 20:43:55 +02:00
parent 7fd40d34b2
commit 115f07e6f2
3 changed files with 96 additions and 3 deletions
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3
flock/ctl.c
View File

@ -184,9 +184,12 @@ hcs_parse(struct cbor_parser_context *ctx, const byte *buf, s64 size)
case 3: /* telnet listener open */
if ((ctx->type != 7) || (ctx->value != 22))
CBOR_PARSER_ERROR("Expected null, got %u-%u", ctx->type, ctx->value);
/* TODO: allow this also for machines */
log(L_INFO "Requested telnet open");
hexp_get_telnet(ctx->sock, NULL);
ctx->major_state = 1;
break;

2
flock/flock.h
View File

@ -25,6 +25,8 @@ void hcs_parser_cleanup(struct cbor_parser_context *ctx);
const char *hcs_error(struct cbor_parser_context *ctx);
bool hcs_complete(struct cbor_parser_context *ctx);
void hexp_get_telnet(sock *, const char *name);
extern event reboot_event, poweroff_event;
extern event_list shutdown_event_list;

94
flock/hypervisor.c
View File

@ -1,7 +1,9 @@
#include "lib/birdlib.h"
#include "lib/resource.h"
#include "lib/cbor.h"
#include "lib/hash.h"
#include "lib/io-loop.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "flock/flock.h"
@ -149,8 +151,18 @@ hypervisor_exposed_parent_err(sock *sk UNUSED, int e UNUSED)
static int
hypervisor_exposed_child_rx(sock *sk, uint size UNUSED)
{
log(L_INFO "HV EC RX");
recvmsg(sk->fd, NULL, 0);
byte buf[128];
struct iovec v = {
.iov_base = buf,
.iov_len = sizeof buf,
};
struct msghdr m = {
.msg_iov = &v,
.msg_iovlen = 1,
};
int e = recvmsg(sk->fd, &m, 0);
log(L_INFO "HV EC RX %d", e);
return 0;
}
@ -211,3 +223,79 @@ hypervisor_exposed_fork(void)
/* Wait for Godot */
birdloop_minimalist_main();
}
/**
* Hypervisor's mapping between external ports and names
*/
#define HEXP_TELNET_KEY(tp) tp->name, tp->hash
#define HEXP_TELNET_NEXT(tp) tp->next
#define HEXP_TELNET_EQ(a,h,b,i) ((h) == (i)) && (!(a) && !(b) || !strcmp(a,b))
#define HEXP_TELNET_FN(a,h) h
struct hexp_telnet_port {
struct hexp_telnet_port *next;
const char *name;
uint hash;
uint port;
};
static struct hexp_telnet {
pool *pool;
HASH(struct hexp_telnet_port) port_hash;
} hexp_telnet;
static void
hexp_init_telnet(void)
{
pool *p = rp_new(hcs_pool, hcs_pool->domain, "Hypervisor exposed telnets");
hexp_telnet.pool = p;
HASH_INIT(hexp_telnet.port_hash, p, 6);
}
static void
hexp_have_telnet(sock *s, struct hexp_telnet_port *p)
{
struct linpool *lp = lp_new(s->pool);
struct cbor_writer *cw = cbor_init(s->tbuf, s->tbsize, lp);
cbor_open_block_with_length(cw, 1);
cbor_add_int(cw, -2);
cbor_add_int(cw, p->port);
sk_send(s, cw->pt);
rfree(lp);
}
void
hexp_get_telnet(sock *s, const char *name)
{
if (!hexp_telnet.pool)
hexp_init_telnet();
uint h = name ? mem_hash(name, strlen(name)) : 0;
struct hexp_telnet_port *p = HASH_FIND(hexp_telnet.port_hash, HEXP_TELNET, name, h);
if (p)
return hexp_have_telnet(s, p);
uint8_t buf[64];
linpool *lp = lp_new(s->pool);
struct cbor_writer *cw = cbor_init(buf, sizeof buf, lp);
cbor_open_block_with_length(cw, 1);
cbor_add_int(cw, 1);
cw->cbor[cw->pt++] = 0xf6;
struct iovec v = {
.iov_base = buf,
.iov_len = cw->pt,
};
struct msghdr m = {
.msg_iov = &v,
.msg_iovlen = 1,
};
int e = sendmsg(he.s->fd, &m, 0);
if (e != cw->pt)
bug("sendmsg error handling not implemented, got %d (%m)", e);
rfree(lp);
}