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urbit/v/ames.c
Christian Carter 3af3130bdc Cleaning up old code
2013-09-28 13:21:18 -07:00

365 lines
8.3 KiB
C
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/* v/http.c
**
** This file is in the public domain.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <setjmp.h>
#include <gmp.h>
#include <stdint.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <uv.h>
#include <errno.h>
#include <curses.h>
#include <termios.h>
#include <term.h>
#include "all.h"
#include "v/vere.h"
/* _ames_alloc(): libuv buffer allocator.
*/
static uv_buf_t
_ames_alloc(uv_handle_t* had_u, size_t len_i)
{
return uv_buf_init(malloc(len_i), len_i);
}
/* _ames_czar(): quasi-static route to emperor.
*/
static c3_w
_ames_czar(c3_y imp_y, c3_s* por_s)
{
u2_ames* sam_u = &u2_Host.sam_u;
if ( u2_yes == u2_Host.ops_u.loh ) {
*por_s = 31337 + imp_y;
return 0x7f000001;
}
else {
*por_s = 13337 + imp_y;
if ( 0xffffffff == sam_u->imp_w[imp_y] ) {
return 0;
}
else if ( 0 == sam_u->imp_w[imp_y] ) {
u2_noun nam = u2_dc("scot", 'p', imp_y);
c3_c* nam_c = u2_cr_string(nam);
c3_c dns_c[64];
sprintf(dns_c, "%s.urbit.org", nam_c + 1);
// uL(fprintf(uH, "czar %s, dns %s\n", nam_c, dns_c));
free(nam_c);
u2z(nam);
{
struct addrinfo* air_u;
if ( 0 != getaddrinfo(dns_c, 0, 0, &air_u) ) {
uL(fprintf(uH, "ames: czar at %s: not found (a)\n", dns_c));
sam_u->imp_w[imp_y] = 0xffffffff;
return 0;
}
{
struct addrinfo* rai_u = air_u;
while ( 1 ) {
if ( !rai_u ) {
uL(fprintf(uH, "ames: czar at %s: not found (b)\n", dns_c));
sam_u->imp_w[imp_y] = 0xffffffff;
return 0;
}
if ( (AF_INET == rai_u->ai_family) ) {
struct sockaddr_in* add_u = (struct sockaddr_in *)rai_u->ai_addr;
sam_u->imp_w[imp_y] = ntohl(add_u->sin_addr.s_addr);
#if 1
{
u2_noun wad = u2_ci_words(1, &sam_u->imp_w[imp_y]);
u2_noun nam = u2_dc("scot", c3__if, wad);
c3_c* nam_c = u2_cr_string(nam);
uL(fprintf(uH, "ames: czar %s: ip %s\n", dns_c, nam_c));
free(nam_c); u2z(nam);
}
#endif
break;
}
rai_u = rai_u->ai_next;
}
}
freeaddrinfo(air_u);
}
}
return sam_u->imp_w[imp_y];
}
}
/* _ames_lane_ipv4(): IPv4 address/ from lane.
*/
u2_bean
_ames_lane_ip(u2_noun lan, c3_s* por_s, c3_w* pip_w)
{
switch ( u2h(lan) ) {
case c3__if: {
*por_s= (c3_s) u2h(u2t(lan));
*pip_w = u2_cr_word(0, u2t(u2t(lan)));
return u2_yes;
} break;
case c3__is: {
u2_noun pq_lan = u2h(u2t(u2t(lan)));
if ( u2_nul == pq_lan ) return u2_no;
else return _ames_lane_ip(u2t(pq_lan), por_s, pip_w);
} break;
case c3__ix: {
*por_s = (c3_s) u2h(u2t(u2t(lan)));
*pip_w = u2_cr_word(0, u2t(u2t(u2t(lan))));
return u2_yes;
} break;
}
return u2_no;
}
/* An unusual lameness in libuv.
*/
typedef struct {
uv_udp_send_t snd_u;
c3_y* buf_y;
} _u2_udp_send_t;
/* _ames_send_cb(): send callback.
*/
static void
_ames_send_cb(uv_udp_send_t* req_u, c3_i sas_i)
{
_u2_udp_send_t* ruq_u = (void*)req_u;
if ( 0 != sas_i ) {
uL(fprintf(uH, "ames: send_cb: %s\n", uv_strerror(uv_last_error(u2L))));
}
// fprintf(stderr, "ames: tx\r\n");
free(ruq_u->buf_y);
free(ruq_u);
}
/* u2_ames_ef_send(): send packet to network (v4).
*/
void
u2_ames_ef_send(u2_noun lan, u2_noun pac)
{
u2_ames* sam_u = &u2_Host.sam_u;
c3_s por_s;
c3_w pip_w;
if ( u2_Host.ops_u.fuz_w && ((rand() % 100) < u2_Host.ops_u.fuz_w) ) {
u2z(pac);
return;
}
if ( u2_yes == _ames_lane_ip(lan, &por_s, &pip_w) ) {
c3_w len_w = u2_cr_met(3, pac);
c3_y* buf_y = malloc(len_w);
u2_cr_bytes(0, len_w, buf_y, pac);
if ( 0 == pip_w ) {
pip_w = 0x7f000001;
por_s = u2_Host.sam_u.por_s;
}
{
struct sockaddr_in add_u;
if ( (0 == (pip_w >> 16)) && (1 == (pip_w >> 8)) ) {
c3_y imp_y = (pip_w & 0xff);
pip_w = _ames_czar(imp_y, &por_s);
}
if ( 0 != pip_w ) {
uv_buf_t buf_u = uv_buf_init((c3_c*)buf_y, len_w);
_u2_udp_send_t* ruq_u = malloc(sizeof(_u2_udp_send_t));
ruq_u->buf_y = buf_y;
memset(&add_u, 0, sizeof(add_u));
add_u.sin_family = AF_INET;
add_u.sin_addr.s_addr = htonl(pip_w);
add_u.sin_port = htons(por_s);
if ( 0 != uv_udp_send(&ruq_u->snd_u,
&sam_u->wax_u,
&buf_u, 1,
add_u,
_ames_send_cb) ) {
uL(fprintf(uH, "ames: send: %s\n", uv_strerror(uv_last_error(u2L))));
}
// fprintf(stderr, "ames: send\r\n");
}
}
}
u2z(lan); u2z(pac);
}
/* _ames_time_cb(): timer callback.
*/
static void
_ames_time_cb(uv_timer_t* tim_u, c3_i sas_i)
{
u2_lo_open();
{
u2_reck_plan
(u2A,
u2nt(c3__gold, c3__ames, u2_nul),
u2nc(c3__wake, u2_nul));
}
u2_lo_shut(u2_no);
}
/* _ames_recv_cb(): receive callback.
*/
static void
_ames_recv_cb(uv_udp_t* wax_u,
ssize_t nrd_i,
uv_buf_t buf_u,
struct sockaddr* adr_u,
unsigned flg_i)
{
// fprintf(stderr, "ames: rx\r\n");
if ( 0 == nrd_i ) {
free(buf_u.base);
}
else {
u2_lo_open();
{
struct sockaddr_in* add_u = (struct sockaddr_in *)adr_u;
u2_noun msg = u2_ci_bytes((c3_w)nrd_i, (c3_y*)buf_u.base);
c3_s por_s = ntohs(add_u->sin_port);
c3_w pip_w = ntohl(add_u->sin_addr.s_addr);
// fprintf(stderr, "ames: plan\r\n");
u2_reck_plan
(u2A,
u2nt(c3__gold, c3__ames, u2_nul),
u2nt(c3__hear, u2nt(c3__if, por_s, u2_ci_words(1, &pip_w)), msg));
}
u2_lo_shut(u2_yes);
}
}
/* u2_ames_io_init(): initialize ames I/O.
*/
void
u2_ames_io_init()
{
u2_ames* sam_u = &u2_Host.sam_u;
c3_s por_s;
srand(time(0)); // don't panic, only for fuzz testing
por_s = 0;
if ( 0 != u2_Host.ops_u.imp_c ) {
u2_noun imp = u2_ci_string(u2_Host.ops_u.imp_c);
u2_noun num = u2_dc("slaw", 'p', imp);
c3_y num_y;
if ( u2_no == u2du(num) ) {
uL(fprintf(uH, "malformed emperor: %s\n", u2_Host.ops_u.imp_c));
exit(1);
}
num_y = u2_cr_byte(0, u2t(num));
_ames_czar(num_y, &por_s);
// uL(fprintf(uH, "ames: czar: %s on %d\n", u2_Host.ops_u.imp_c, por_s));
u2z(num);
}
if ( 0 != uv_udp_init(u2L, &sam_u->wax_u) ) {
uL(fprintf(uH, "ames: init: %s\n", uv_strerror(uv_last_error(u2L))));
c3_assert(0);
}
// Bind and stuff.
{
struct sockaddr_in add_u;
c3_i add_i = sizeof(add_u);
memset(&add_u, 0, sizeof(add_u));
add_u.sin_family = AF_INET;
add_u.sin_addr.s_addr = htonl(INADDR_ANY);
add_u.sin_port = htons(por_s);
if ( uv_udp_bind(&sam_u->wax_u, add_u, 0) != 0 ) {
uL(fprintf(uH, "ames: init: %s\n",
uv_strerror(uv_last_error(u2L))));
c3_assert(0);
}
uv_udp_getsockname(&sam_u->wax_u, (struct sockaddr *)&add_u, &add_i);
c3_assert(add_u.sin_port);
por_s = ntohs(add_u.sin_port);
sam_u->por_s = por_s;
fprintf(stderr, "ames: on localhost, UDP %d.\n", por_s);
uv_udp_recv_start(&sam_u->wax_u, _ames_alloc, _ames_recv_cb);
}
// Timer too.
{
uv_timer_init(u2L, &sam_u->tim_u);
}
}
/* u2_ames_io_exit(): terminate ames I/O.
*/
void
u2_ames_io_exit()
{
u2_ames* sam_u = &u2_Host.sam_u;
uv_close((uv_handle_t*)&sam_u->wax_u, 0);
}
/* u2_ames_io_poll(): update ames IO state.
*/
void
u2_ames_io_poll()
{
u2_ames* sam_u = &u2_Host.sam_u;
u2_noun wen = u2_reck_keep(u2A, u2nt(c3__gold, c3__ames, u2_nul));
if ( (u2_nul != wen) &&
(u2_yes == u2du(wen)) &&
(u2_yes == u2ud(u2t(wen))) )
{
c3_d gap_d = u2_time_gap_ms(u2k(u2A->now), u2k(u2t(wen)));
if ( u2_yes == sam_u->alm ) {
uv_timer_stop(&sam_u->tim_u);
}
else sam_u->alm = u2_yes;
uv_timer_start(&sam_u->tim_u, _ames_time_cb, gap_d, 0);
}
else {
if ( u2_yes == sam_u->alm ) {
uv_timer_stop(&sam_u->tim_u);
}
sam_u->alm = u2_no;
}
u2z(wen);
}
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