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khan: cue, remove obsolete read_cb

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This commit is contained in:
Jōshin 2021-10-03 18:23:54 +00:00
parent f1fee9e1d0
commit f51137d663
1 changed files with 17 additions and 54 deletions
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71
pkg/urbit/vere/io/khan.c
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@ -33,6 +33,7 @@
u3_auto car_u; // driver
c3_l sev_l; // instance number
struct _u3_shan* san_u; // server reference
u3_cue_xeno* sil_u; // cue handle
} u3_khan;
static const c3_c URB_SOCK_PATH[] = ".urb/khan.sock";
@ -45,63 +46,27 @@ _khan_close_cb(uv_handle_t* had_u)
c3_free(had_u);
}
/* _khan_read_cb(): socket read callback.
*/
static void
_khan_read_cb(uv_stream_t* cli_u, ssize_t red_i, const uv_buf_t* buf_u)
_khan_moor_bail(void* ptr_v, ssize_t err_i, const c3_c* err_c)
{
u3l_log("khan: read %zd\n", red_i);
// TODO interact
//
// There are four cases to think about here:
//
// 1. peek, runtime
// 2. poke, runtime
// 3. peek, arvo
// 4. poke, arvo
//
// For 1, the driver itself parses and responds to a few basic text-mode
// commands:
// `ok`: driver responds with "ok\n" (basic health test)
// `dump`: dumps runtime stat counters in simple machine/human-readable format
//
// There is not yet a use case for 2.
//
// For 3 and 4, we speak a binary protocol using jammed nouns, as (to be)
// documented in pkg/arvo/sys/vane/khan.hoon.
//
// The transition to arvo is signalled by a 0x80 (i.e. byte with MSB high) at
// the start of a line (i.e. as first character, or immediately following a
// '\n'.) Everything after that is simply forwarded to arvo, and responses
// forwarded back, for the rest of the duration of the connection.
//
// Some alternate protocol designs:
//
// a. Forward everything to arvo.
// b. Add a command that sends a single-shot jammed noun, which receives a
// single-shot response.
// c. Listen on two or more different sockets.
//
// (a) is undesirable since we don't want to sync the runtime stats with
// arvo. Continuous sync would add unnecessary load, and on-demand sync would
// add unnecessary implementation complexity in the form of extra round-trips
// between arvo and the runtime. (b) is probably fine, but I'm not smart
// enough to know how to tell from the runtime when a jammed noun has
// finished sending without base64-encoding it or something. (c) is tedious;
// the same effect can be achieved by just opening two connections to the
// socket, keeping one in text mode, and sending a 0x80 over the other.
u3l_log("khan: bail called %p %zd %s\n", ptr_v, err_i, err_c);
}
static void
_khan_moor_poke(void* ptr_v, c3_d len_d, c3_y* byt_y)
{
u3l_log("khan: poke called %p %" PRIu64 " %s\n", ptr_v, len_d, byt_y);
}
u3_weak jar;
u3_chan* can_u = (u3_chan*)ptr_v;
u3_khan* kan_u = can_u->san_u->kan_u;
static void
_khan_moor_bail(void* ptr_v, ssize_t err_i, const c3_c* err_c)
{
u3l_log("khan: bail called %p %zd %s\n", ptr_v, err_i, err_c);
u3l_log("khan: poke called %p %" PRIu64 " %s\n", ptr_v, len_d, byt_y);
jar = u3s_cue_xeno_with(kan_u->sil_u, len_d, byt_y);
if ( u3_none == jar ) {
_khan_moor_bail(ptr_v, -1, "bad jar");
// TODO handle runtime peek/poke
// TODO send noun to %khan
}
}
/* _khan_conn_cb(): socket connection callback.
@ -273,11 +238,7 @@ _khan_io_exit(u3_auto* car_u)
{
u3_khan* kan_u = (u3_khan*)car_u;
if ( car_u->liv_o == c3n ) {
c3_free(car_u);
return;
}
else {
if ( car_u->liv_o == c3y ) {
c3_c* pax_c = u3_Host.dir_c;
c3_w len_w = strlen(pax_c) + 1 + sizeof(URB_SOCK_PATH);
c3_c* paf_c = c3_malloc(len_w);
@ -306,6 +267,7 @@ _khan_io_exit(u3_auto* car_u)
}
}
u3s_cue_xeno_done(kan_u->sil_u);
c3_free(kan_u);
}
@ -317,6 +279,7 @@ u3_khan_io_init(u3_pier* pir_u)
u3_khan* kan_u = c3_calloc(sizeof(*kan_u));
u3_auto* car_u = &kan_u->car_u;
kan_u->sil_u = u3s_cue_xeno_init();
car_u->nam_m = c3__khan;
car_u->liv_o = c3n;
car_u->io.talk_f = _khan_io_talk;