[netwatch.git] / net / rfb.c

#include <stdint.h>
#include <minilib.h>
#include <output.h>
#include <fb.h>

#include "lwip/tcp.h"

#include "rfb.h"

#define SET_PIXEL_FORMAT	0
#define SET_ENCODINGS		2
#define FB_UPDATE_REQUEST	3
#define KEY_EVENT		4
#define POINTER_EVENT		5
#define CLIENT_CUT_TEXT		6

#define RFB_BUF_SIZE	64

struct pixel_format {
	uint8_t bpp;
	uint8_t depth;
	uint8_t big_endian;
	uint8_t true_color;
	uint16_t red_max;
	uint16_t green_max;
	uint16_t blue_max;
	uint8_t red_shift;
	uint8_t green_shift;
	uint8_t blue_shift;
	uint8_t padding[3];
};

struct server_init_message {
	uint16_t fb_width;
	uint16_t fb_height;
	struct pixel_format fmt;
	uint32_t name_length;
	char name_string[8];
};

struct fb_update_req {
	uint8_t msgtype;
	uint8_t incremental;
	uint16_t xpos;
	uint16_t ypos;
	uint16_t width;
	uint16_t height;
};

struct set_encs_req {
	uint8_t msgtype;
	uint8_t padding;
	uint16_t num;
	int32_t encodings[];
};

struct key_event_pkt {
	uint8_t msgtype;
	uint8_t downflag;
	uint8_t pad[2];
	uint32_t keysym;
};

struct pointer_event_pkt {
	uint8_t msgtype;
	uint8_t button_mask;
	uint16_t x;
	uint16_t y;
};

struct text_event_pkt {
	uint8_t msgtype;
	uint8_t padding[3];
	uint32_t length;
	char text[];
};

struct update_header {
	uint8_t msgtype;
	uint8_t padding;
	uint16_t nrects;
	uint16_t xpos;
	uint16_t ypos;
	uint16_t width;
	uint16_t height;
	int32_t enctype;
};

struct rfb_state {
	enum {
		ST_BEGIN,
		ST_CLIENTINIT,
		ST_MAIN
	} state;
	int version;
	int encs_remaining;

	char data[RFB_BUF_SIZE];
	int readpos;
	int writepos;

	char next_update_incremental;
	char update_requested;

	struct fb_update_req client_interest_area;

	enum {
		SST_IDLE,
		SST_NEEDS_UPDATE,
		SST_SENDING
	} send_state;

	uint32_t update_pos;
	uint32_t frame_bytes;
};

static struct server_init_message server_info;

static void init_server_info() {
	server_info.name_length = htonl(8);
	memcpy(server_info.name_string, "NetWatch", 8);
}

static void update_server_info() {
	if (fb != NULL) {
		outputf("RFB: setting fmt %d", fb->curmode.format);
		server_info.fb_width = htons(fb->curmode.xres);
		server_info.fb_height = htons(fb->curmode.yres);
		switch (fb->curmode.format) {
		case FB_RGB888:
			server_info.fmt.bpp = 32;
			server_info.fmt.depth = 24;
			server_info.fmt.big_endian = 0;
			server_info.fmt.true_color = 1;
			server_info.fmt.red_max = htons(255);
			server_info.fmt.green_max = htons(255);
			server_info.fmt.blue_max = htons(255);
			server_info.fmt.red_shift = 0;
			server_info.fmt.green_shift = 8;
			server_info.fmt.blue_shift = 16;
			break;
		default:
			outputf("RFB: unknown fb fmt %d", fb->curmode.format);
			break;
		}
	} else {
		outputf("RFB: fb null");
	}
}

static void send_fsm(struct tcp_pcb *pcb, struct rfb_state *state) {
	struct update_header hdr;
	int left, sndlength;
	err_t err;

	switch (state->send_state) {
	case SST_IDLE:
		/* Nothing to do */
		if (state->update_requested) {
			outputf("RFB send: update requested");
			state->update_requested = 0;
			state->send_state = SST_NEEDS_UPDATE;
		} else {
			break;
		}
	
		/* potential FALL THROUGH */

	case SST_NEEDS_UPDATE:
		outputf("RFB send: sending header");
		/* Send a header */
		state->frame_bytes = fb->curmode.xres * fb->curmode.yres * 3; /* XXX */
		hdr.msgtype = 0;
		hdr.nrects = htons(1);
		hdr.xpos = htons(0);
		hdr.ypos = htons(0);
		hdr.width = htons(fb->curmode.xres);
		hdr.height = htons(fb->curmode.yres);
		hdr.enctype = htonl(0);
		tcp_write(pcb, &hdr, sizeof(hdr), 0);
		tcp_output(pcb);

		state->update_pos = 0;
		state->send_state = SST_SENDING;

		/* FALL THROUGH */

	case SST_SENDING:
		left = state->frame_bytes - state->update_pos;

		if (left > tcp_sndbuf(pcb)) {
			sndlength = tcp_sndbuf(pcb);
		} else {
			sndlength = left;
		}

		do {
			err = tcp_write(pcb, fb->fbaddr + state->update_pos, sndlength, 0);
			if (err == ERR_MEM) {
				outputf("RFB: ERR_MEM sending %d", sndlength);
				sndlength /= 2;
			}
		} while (err == ERR_MEM && sndlength > 1);

		if (err == ERR_OK) {
			outputf("RFB: sent %d", sndlength);
			state->update_pos += sndlength;
		} else {
			outputf("RFB: send error %d", err);
		}

		tcp_output(pcb);

		if (state->update_pos == state->frame_bytes) {
			state->send_state = SST_IDLE;
		}

		break;
	}
}

static err_t rfb_sent(void *arg, struct tcp_pcb *pcb, uint16_t len) {
	struct rfb_state *state = arg;
	send_fsm(pcb, state);
	return ERR_OK;
}

static void close_conn(struct tcp_pcb *pcb, struct rfb_state *state) {
	tcp_arg(pcb, NULL);
	tcp_sent(pcb, NULL);
	tcp_recv(pcb, NULL);
	mem_free(state);
	tcp_close(pcb);
}

enum fsm_result {
	NEEDMORE,
	OK,
	FAIL
};

static enum fsm_result recv_fsm(struct tcp_pcb *pcb, struct rfb_state *state) {
	int i;
	int pktsize;

	outputf("RFB FSM: st %d rp %d wp %d", state->state, state->readpos,
		state->writepos);

	switch(state->state) {
	case ST_BEGIN:
		if (state->writepos < 12) return NEEDMORE;

		if (!strncmp(state->data, "RFB 003.003\n", 12)) {
			state->version = 3;
		} else if (!strncmp(state->data, "RFB 003.005\n", 12)) {
			/* Spec states that "RFB 003.005", an incorrect value,
			 * should be treated by the server as 3.3. */
			state->version = 3;
		} else if (!strncmp(state->data, "RFB 003.007\n", 12)) {
			state->version = 7;
		} else if (!strncmp(state->data, "RFB 003.008\n", 12)) {
			state->version = 8;
		} else {
			outputf("RFB: Negotiation fail");
			return FAIL;
		}

		outputf("RFB: Negotiated v3.%d", state->version);

		state->readpos += 12;
		state->state = ST_CLIENTINIT;

		/* We support one security type, currently "none".
		 * Send that and SecurityResult. */
		if (state->version >= 7) {
			tcp_write(pcb, "\x01\x01\x00\x00\x00\x00", 6, 0);
		} else {
			tcp_write(pcb, "\x01\x00\x00\x00\x00", 5, 0);
		}

		tcp_output(pcb);

		return OK;

	case ST_CLIENTINIT:
		if (state->version >= 7) {
			/* Ignore the security type and ClientInit */
			if (state->writepos < 2) return NEEDMORE;
			state->readpos += 2;
		} else {
			/* Just ClientInit */
			if (state->writepos < 1) return NEEDMORE;
			state->readpos += 1;
		}

		state->state = ST_MAIN;

		outputf("RFB: Sending server info", state->version);
		tcp_write(pcb, &server_info, sizeof(server_info), 0);
		tcp_output(pcb);

		return OK;

	case ST_MAIN:
		if (state->writepos < 1) return NEEDMORE;

		outputf("RFB: cmd %d", state->data[0]);
		switch (state->data[0]) {

		case SET_PIXEL_FORMAT:
			/* SetPixelFormat */
			if (state->writepos < (sizeof(struct pixel_format) + 4))
				return NEEDMORE;
			outputf("RFB: SetPixelFormat");
/*
			struct pixel_format * new_fmt =
				(struct pixel_format *)(&state->data[4]);
*/
			/* XXX ... */

			state->readpos += sizeof(struct pixel_format) + 4;
			return OK;

		case SET_ENCODINGS:
			if (state->writepos < 4) return NEEDMORE;

			struct set_encs_req * req = (struct set_encs_req *)state->data;

			pktsize = sizeof(struct set_encs_req) + (4 * ntohs(req->num));

			outputf("RFB: SetEncodings [%d]", ntohs(req->num));
			if (state->writepos < pktsize) return NEEDMORE;

			for (i = 0; i < ntohs(req->num); i++) {
				outputf("RFB: Encoding: %d", ntohl(req->encodings[i]));
				/* XXX ... */

			}

			state->readpos += pktsize;
			return OK;

		case FB_UPDATE_REQUEST:
			if (state->writepos < sizeof(struct fb_update_req))
				return NEEDMORE;
			outputf("RFB: UpdateRequest");

			state->update_requested = 1;
			memcpy(&state->client_interest_area, state->data,
			       sizeof(struct fb_update_req)); 

			state->readpos += sizeof(struct fb_update_req);
			return OK;

		case KEY_EVENT:
			if (state->writepos < sizeof(struct key_event_pkt))
				return NEEDMORE;
			outputf("RFB: Key");

			/* XXX stub */

			state->readpos += sizeof(struct key_event_pkt);
			return OK;

		case POINTER_EVENT:
			if (state->writepos < sizeof(struct pointer_event_pkt))
				return NEEDMORE;
			outputf("RFB: Pointer");

			/* XXX stub */

			state->readpos += sizeof(struct pointer_event_pkt);
			return OK;

		case CLIENT_CUT_TEXT:
			if (state->writepos < sizeof(struct text_event_pkt))
				return NEEDMORE;
			outputf("RFB: Cut Text");

			struct text_event_pkt * pkt =
				(struct text_event_pkt *)state->data;

			if (state->writepos < sizeof(struct text_event_pkt)
			                      + pkt->length)
				return NEEDMORE;

			/* XXX stub */

			state->readpos += sizeof(struct text_event_pkt)
			                  + pkt->length;
			return OK;

		default:
			outputf("RFB: Bad command: %d", state->data[0]);
		}
	default:
		outputf("RFB: Bad state");
		return FAIL;
	}
}

static err_t rfb_recv(void *arg, struct tcp_pcb *pcb,
                      struct pbuf *p, err_t err) {
	struct rfb_state *state = arg;

	if (state == NULL) 

	if (err != ERR_OK) {
		outputf("RFB: recv err %d", err);
		/* FIXME do something better here? */
		return ERR_OK;
	}

	if (p == NULL) {
		outputf("RFB: Connection closed");
		close_conn(pcb, state);
		return ERR_OK;
	}

	if (p->tot_len > (RFB_BUF_SIZE - state->writepos)) {
		/* Overflow! */
		outputf("RFB: Overflow!");
		close_conn(pcb, state);
		return ERR_OK;
	}

	outputf("RFB: Processing %d", p->tot_len);
	pbuf_copy_partial(p, state->data + state->writepos, p->tot_len, 0);
	state->writepos += p->tot_len;

	tcp_recved(pcb, p->tot_len);
	pbuf_free(p);

	while (1) {
		switch (recv_fsm(pcb, state)) {
		case NEEDMORE:
			outputf("RFB FSM: blocking");
			/* Need more data */
			return ERR_OK;

		case OK:
			outputf("RFB FSM: ok");

			/* Might as well send now... */
			if (state->send_state == SST_IDLE
			    && state->update_requested) {
				send_fsm(pcb, state);
			}

			if (state->readpos == state->writepos) {
				state->readpos = 0;
				state->writepos = 0;
				return ERR_OK;
			} else {
				memmove(state->data,
				        state->data + state->readpos,
				        state->writepos - state->readpos);
			}
			break;
		case FAIL:
			/* Shit */
			outputf("RFB: Protocol error");
			close_conn(pcb, state);
			return ERR_OK;
		}
	}
}	
		
static err_t rfb_accept(void *arg, struct tcp_pcb *pcb, err_t err) {
	struct rfb_state *state;

	LWIP_UNUSED_ARG(arg);
	LWIP_UNUSED_ARG(err);

	state = (struct rfb_state *)mem_malloc(sizeof(struct rfb_state));

	state->state = ST_BEGIN;
	state->readpos = 0;
	state->writepos = 0;
	state->update_requested = 0;
	state->send_state = SST_IDLE;

	/* XXX: update_server_info() should be called from the 64ms timer, and deal
	 * with screen resizes appropriately. */
	update_server_info();

	if (!state)
	{
		outputf("rfb_accept: out of memory\n");
		return ERR_MEM;
	}

	tcp_arg(pcb, state);
	tcp_recv(pcb, rfb_recv);
	tcp_sent(pcb, rfb_sent);
/*
	tcp_err(pcb, rfb_err);
	tcp_poll(pcb, rfb_poll, 2);
*/
	tcp_write(pcb, "RFB 003.008\n", 12, 0);
	tcp_output(pcb);

	return ERR_OK;
}

void rfb_init() {
	struct tcp_pcb *pcb;

	init_server_info();

	pcb = tcp_new();
	tcp_bind(pcb, IP_ADDR_ANY, RFB_PORT);
	pcb = tcp_listen(pcb);
	tcp_accept(pcb, rfb_accept);
}
Commit	Line	Data
7da36fbd JP	1	#include <stdint.h>
	2	#include <minilib.h>
	3	#include <output.h>
	4	#include <fb.h>
	5
	6	#include "lwip/tcp.h"
	7
	8	#include "rfb.h"
	9
	10	#define SET_PIXEL_FORMAT 0
	11	#define SET_ENCODINGS 2
	12	#define FB_UPDATE_REQUEST 3
	13	#define KEY_EVENT 4
	14	#define POINTER_EVENT 5
	15	#define CLIENT_CUT_TEXT 6
	16
80726808	17	#define RFB_BUF_SIZE 64
7da36fbd JP	18
	19	struct pixel_format {
	20	uint8_t bpp;
	21	uint8_t depth;
	22	uint8_t big_endian;
	23	uint8_t true_color;
	24	uint16_t red_max;
	25	uint16_t green_max;
	26	uint16_t blue_max;
	27	uint8_t red_shift;
	28	uint8_t green_shift;
	29	uint8_t blue_shift;
	30	uint8_t padding[3];
	31	};
	32
	33	struct server_init_message {
	34	uint16_t fb_width;
	35	uint16_t fb_height;
	36	struct pixel_format fmt;
	37	uint32_t name_length;
	38	char name_string[8];
	39	};
	40
	41	struct fb_update_req {
	42	uint8_t msgtype;
	43	uint8_t incremental;
	44	uint16_t xpos;
	45	uint16_t ypos;
	46	uint16_t width;
	47	uint16_t height;
	48	};
	49
	50	struct set_encs_req {
	51	uint8_t msgtype;
	52	uint8_t padding;
	53	uint16_t num;
	54	int32_t encodings[];
	55	};
	56
	57	struct key_event_pkt {
	58	uint8_t msgtype;
	59	uint8_t downflag;
	60	uint8_t pad[2];
	61	uint32_t keysym;
	62	};
	63
	64	struct pointer_event_pkt {
	65	uint8_t msgtype;
	66	uint8_t button_mask;
	67	uint16_t x;
	68	uint16_t y;
	69	};
	70
	71	struct text_event_pkt {
	72	uint8_t msgtype;
	73	uint8_t padding[3];
	74	uint32_t length;
	75	char text[];
	76	};
	77
8ceb0515 JP	78	struct update_header {
	79	uint8_t msgtype;
	80	uint8_t padding;
	81	uint16_t nrects;
	82	uint16_t xpos;
	83	uint16_t ypos;
	84	uint16_t width;
	85	uint16_t height;
	86	int32_t enctype;
	87	};
	88
7da36fbd JP	89	struct rfb_state {
	90	enum {
	91	ST_BEGIN,
	92	ST_CLIENTINIT,
	93	ST_MAIN
	94	} state;
	95	int version;
	96	int encs_remaining;
	97
	98	char data[RFB_BUF_SIZE];
	99	int readpos;
	100	int writepos;
	101
	102	char next_update_incremental;
8ceb0515 JP	103	char update_requested;
8ceb0515 JP	104
7da36fbd JP	105	struct fb_update_req client_interest_area;
7da36fbd JP	106
8ceb0515 JP	107	enum {
	108	SST_IDLE,
	109	SST_NEEDS_UPDATE,
	110	SST_SENDING
	111	} send_state;
	112
	113	uint32_t update_pos;
	114	uint32_t frame_bytes;
7da36fbd JP	115	};
	116
	117	static struct server_init_message server_info;
	118
	119	static void init_server_info() {
80726808	120	server_info.name_length = htonl(8);
7da36fbd JP	121	memcpy(server_info.name_string, "NetWatch", 8);
	122	}
	123
	124	static void update_server_info() {
	125	if (fb != NULL) {
80726808 JP	126	outputf("RFB: setting fmt %d", fb->curmode.format);
	127	server_info.fb_width = htons(fb->curmode.xres);
	128	server_info.fb_height = htons(fb->curmode.yres);
7da36fbd JP	129	switch (fb->curmode.format) {
	130	case FB_RGB888:
	131	server_info.fmt.bpp = 32;
	132	server_info.fmt.depth = 24;
	133	server_info.fmt.big_endian = 0;
	134	server_info.fmt.true_color = 1;
80726808 JP	135	server_info.fmt.red_max = htons(255);
	136	server_info.fmt.green_max = htons(255);
	137	server_info.fmt.blue_max = htons(255);
7da36fbd JP	138	server_info.fmt.red_shift = 0;
	139	server_info.fmt.green_shift = 8;
	140	server_info.fmt.blue_shift = 16;
	141	break;
	142	default:
	143	outputf("RFB: unknown fb fmt %d", fb->curmode.format);
	144	break;
	145	}
80726808 JP	146	} else {
80726808 JP	147	outputf("RFB: fb null");
7da36fbd JP	148	}
	149	}
	150
8ceb0515 JP	151	static void send_fsm(struct tcp_pcb pcb, struct rfb_state state) {
	152	struct update_header hdr;
	153	int left, sndlength;
	154	err_t err;
	155
	156	switch (state->send_state) {
	157	case SST_IDLE:
	158	/* Nothing to do */
	159	if (state->update_requested) {
	160	outputf("RFB send: update requested");
	161	state->update_requested = 0;
	162	state->send_state = SST_NEEDS_UPDATE;
	163	} else {
	164	break;
	165	}
	166
	167	/* potential FALL THROUGH */
	168
	169	case SST_NEEDS_UPDATE:
	170	outputf("RFB send: sending header");
	171	/* Send a header */
	172	state->frame_bytes = fb->curmode.xres * fb->curmode.yres * 3; /* XXX */
	173	hdr.msgtype = 0;
	174	hdr.nrects = htons(1);
	175	hdr.xpos = htons(0);
	176	hdr.ypos = htons(0);
	177	hdr.width = htons(fb->curmode.xres);
	178	hdr.height = htons(fb->curmode.yres);
	179	hdr.enctype = htonl(0);
	180	tcp_write(pcb, &hdr, sizeof(hdr), 0);
	181	tcp_output(pcb);
	182
	183	state->update_pos = 0;
	184	state->send_state = SST_SENDING;
	185
	186	/* FALL THROUGH */
	187
	188	case SST_SENDING:
	189	left = state->frame_bytes - state->update_pos;
	190
	191	if (left > tcp_sndbuf(pcb)) {
	192	sndlength = tcp_sndbuf(pcb);
	193	} else {
	194	sndlength = left;
	195	}
	196
	197	do {
	198	err = tcp_write(pcb, fb->fbaddr + state->update_pos, sndlength, 0);
	199	if (err == ERR_MEM) {
	200	outputf("RFB: ERR_MEM sending %d", sndlength);
	201	sndlength /= 2;
	202	}
	203	} while (err == ERR_MEM && sndlength > 1);
	204
	205	if (err == ERR_OK) {
	206	outputf("RFB: sent %d", sndlength);
	207	state->update_pos += sndlength;
	208	} else {
	209	outputf("RFB: send error %d", err);
	210	}
	211
	212	tcp_output(pcb);
	213
	214	if (state->update_pos == state->frame_bytes) {
215	state->send_state = SST_IDLE;
216	}
217
218	break;
219	}
220	}
221
222	static err_t rfb_sent(void arg, struct tcp_pcb pcb, uint16_t len) {
223	struct rfb_state *state = arg;
224	send_fsm(pcb, state);
225	return ERR_OK;
80726808 JP	226	}
80726808 JP	227
7da36fbd JP	228	static void close_conn(struct tcp_pcb pcb, struct rfb_state state) {
	229	tcp_arg(pcb, NULL);
	230	tcp_sent(pcb, NULL);
	231	tcp_recv(pcb, NULL);
	232	mem_free(state);
	233	tcp_close(pcb);
	234	}
	235
	236	enum fsm_result {
	237	NEEDMORE,
	238	OK,
	239	FAIL
	240	};
	241
	242	static enum fsm_result recv_fsm(struct tcp_pcb pcb, struct rfb_state state) {
80726808 JP	243	int i;
	244	int pktsize;
	245
	246	outputf("RFB FSM: st %d rp %d wp %d", state->state, state->readpos,
	247	state->writepos);
7da36fbd JP	248
	249	switch(state->state) {
	250	case ST_BEGIN:
	251	if (state->writepos < 12) return NEEDMORE;
	252
	253	if (!strncmp(state->data, "RFB 003.003\n", 12)) {
	254	state->version = 3;
	255	} else if (!strncmp(state->data, "RFB 003.005\n", 12)) {
	256	/* Spec states that "RFB 003.005", an incorrect value,
	257	* should be treated by the server as 3.3. */
	258	state->version = 3;
	259	} else if (!strncmp(state->data, "RFB 003.007\n", 12)) {
	260	state->version = 7;
	261	} else if (!strncmp(state->data, "RFB 003.008\n", 12)) {
	262	state->version = 8;
	263	} else {
	264	outputf("RFB: Negotiation fail");
	265	return FAIL;
	266	}
	267
	268	outputf("RFB: Negotiated v3.%d", state->version);
	269
	270	state->readpos += 12;
	271	state->state = ST_CLIENTINIT;
	272
80726808 JP	273	/* We support one security type, currently "none".
80726808 JP	274	* Send that and SecurityResult. */
7da36fbd	275	if (state->version >= 7) {
80726808	276	tcp_write(pcb, "\x01\x01\x00\x00\x00\x00", 6, 0);
7da36fbd	277	} else {
80726808	278	tcp_write(pcb, "\x01\x00\x00\x00\x00", 5, 0);
7da36fbd JP	279	}
7da36fbd JP	280
7da36fbd JP	281	tcp_output(pcb);
	282
	283	return OK;
	284
	285	case ST_CLIENTINIT:
80726808 JP	286	if (state->version >= 7) {
	287	/* Ignore the security type and ClientInit */
	288	if (state->writepos < 2) return NEEDMORE;
	289	state->readpos += 2;
	290	} else {
	291	/* Just ClientInit */
	292	if (state->writepos < 1) return NEEDMORE;
	293	state->readpos += 1;
	294	}
	295
7da36fbd JP	296	state->state = ST_MAIN;
7da36fbd JP	297
80726808	298	outputf("RFB: Sending server info", state->version);
7da36fbd JP	299	tcp_write(pcb, &server_info, sizeof(server_info), 0);
	300	tcp_output(pcb);
	301
	302	return OK;
	303
	304	case ST_MAIN:
	305	if (state->writepos < 1) return NEEDMORE;
	306
80726808	307	outputf("RFB: cmd %d", state->data[0]);
7da36fbd JP	308	switch (state->data[0]) {
	309
	310	case SET_PIXEL_FORMAT:
	311	/* SetPixelFormat */
	312	if (state->writepos < (sizeof(struct pixel_format) + 4))
	313	return NEEDMORE;
80726808	314	outputf("RFB: SetPixelFormat");
7da36fbd JP	315	/*
	316	struct pixel_format * new_fmt =
	317	(struct pixel_format *)(&state->data[4]);
	318	*/
	319	/* XXX ... */
	320
	321	state->readpos += sizeof(struct pixel_format) + 4;
	322	return OK;
	323
	324	case SET_ENCODINGS:
	325	if (state->writepos < 4) return NEEDMORE;
	326
	327	struct set_encs_req * req = (struct set_encs_req *)state->data;
	328
80726808	329	pktsize = sizeof(struct set_encs_req) + (4 * ntohs(req->num));
7da36fbd	330
80726808 JP	331	outputf("RFB: SetEncodings [%d]", ntohs(req->num));
	332	if (state->writepos < pktsize) return NEEDMORE;
	333
	334	for (i = 0; i < ntohs(req->num); i++) {
	335	outputf("RFB: Encoding: %d", ntohl(req->encodings[i]));
	336	/* XXX ... */
7da36fbd	337
80726808 JP	338	}
	339
	340	state->readpos += pktsize;
7da36fbd JP	341	return OK;
	342
	343	case FB_UPDATE_REQUEST:
	344	if (state->writepos < sizeof(struct fb_update_req))
	345	return NEEDMORE;
80726808	346	outputf("RFB: UpdateRequest");
7da36fbd	347
8ceb0515	348	state->update_requested = 1;
7da36fbd JP	349	memcpy(&state->client_interest_area, state->data,
	350	sizeof(struct fb_update_req));
	351
	352	state->readpos += sizeof(struct fb_update_req);
	353	return OK;
	354
	355	case KEY_EVENT:
	356	if (state->writepos < sizeof(struct key_event_pkt))
	357	return NEEDMORE;
80726808	358	outputf("RFB: Key");
7da36fbd JP	359
	360	/* XXX stub */
	361
	362	state->readpos += sizeof(struct key_event_pkt);
	363	return OK;
	364
	365	case POINTER_EVENT:
	366	if (state->writepos < sizeof(struct pointer_event_pkt))
	367	return NEEDMORE;
80726808	368	outputf("RFB: Pointer");
7da36fbd JP	369
	370	/* XXX stub */
	371
	372	state->readpos += sizeof(struct pointer_event_pkt);
	373	return OK;
	374
	375	case CLIENT_CUT_TEXT:
	376	if (state->writepos < sizeof(struct text_event_pkt))
	377	return NEEDMORE;
80726808	378	outputf("RFB: Cut Text");
7da36fbd JP	379
	380	struct text_event_pkt * pkt =
	381	(struct text_event_pkt *)state->data;
	382
	383	if (state->writepos < sizeof(struct text_event_pkt)
	384	+ pkt->length)
	385	return NEEDMORE;
	386
	387	/* XXX stub */
	388
	389	state->readpos += sizeof(struct text_event_pkt)
	390	+ pkt->length;
	391	return OK;
	392
	393	default:
	394	outputf("RFB: Bad command: %d", state->data[0]);
	395	}
	396	default:
	397	outputf("RFB: Bad state");
	398	return FAIL;
	399	}
	400	}
	401
	402	static err_t rfb_recv(void arg, struct tcp_pcb pcb,
	403	struct pbuf *p, err_t err) {
	404	struct rfb_state *state = arg;
	405
	406	if (state == NULL)
	407
	408	if (err != ERR_OK) {
	409	outputf("RFB: recv err %d", err);
	410	/* FIXME do something better here? */
	411	return ERR_OK;
	412	}
	413
	414	if (p == NULL) {
	415	outputf("RFB: Connection closed");
	416	close_conn(pcb, state);
	417	return ERR_OK;
	418	}
	419
	420	if (p->tot_len > (RFB_BUF_SIZE - state->writepos)) {
	421	/* Overflow! */
	422	outputf("RFB: Overflow!");
	423	close_conn(pcb, state);
	424	return ERR_OK;
	425	}
	426
	427	outputf("RFB: Processing %d", p->tot_len);
	428	pbuf_copy_partial(p, state->data + state->writepos, p->tot_len, 0);
80726808 JP	429	state->writepos += p->tot_len;
80726808 JP	430
7da36fbd JP	431	tcp_recved(pcb, p->tot_len);
	432	pbuf_free(p);
	433
	434	while (1) {
	435	switch (recv_fsm(pcb, state)) {
	436	case NEEDMORE:
80726808	437	outputf("RFB FSM: blocking");
7da36fbd JP	438	/* Need more data */
	439	return ERR_OK;
	440
	441	case OK:
80726808 JP	442	outputf("RFB FSM: ok");
	443
	444	/* Might as well send now... */
8ceb0515 JP	445	if (state->send_state == SST_IDLE
	446	&& state->update_requested) {
	447	send_fsm(pcb, state);
80726808 JP	448	}
80726808 JP	449
7da36fbd JP	450	if (state->readpos == state->writepos) {
	451	state->readpos = 0;
	452	state->writepos = 0;
	453	return ERR_OK;
	454	} else {
	455	memmove(state->data,
	456	state->data + state->readpos,
	457	state->writepos - state->readpos);
	458	}
	459	break;
	460	case FAIL:
	461	/* Shit */
	462	outputf("RFB: Protocol error");
	463	close_conn(pcb, state);
	464	return ERR_OK;
	465	}
	466	}
	467	}
	468
	469	static err_t rfb_accept(void arg, struct tcp_pcb pcb, err_t err) {
	470	struct rfb_state *state;
	471
	472	LWIP_UNUSED_ARG(arg);
	473	LWIP_UNUSED_ARG(err);
	474
	475	state = (struct rfb_state *)mem_malloc(sizeof(struct rfb_state));
	476
80726808 JP	477	state->state = ST_BEGIN;
	478	state->readpos = 0;
	479	state->writepos = 0;
8ceb0515 JP	480	state->update_requested = 0;
8ceb0515 JP	481	state->send_state = SST_IDLE;
80726808	482
7da36fbd JP	483	/* XXX: update_server_info() should be called from the 64ms timer, and deal
	484	* with screen resizes appropriately. */
	485	update_server_info();
	486
	487	if (!state)
	488	{
	489	outputf("rfb_accept: out of memory\n");
	490	return ERR_MEM;
	491	}
	492
	493	tcp_arg(pcb, state);
	494	tcp_recv(pcb, rfb_recv);
8ceb0515	495	tcp_sent(pcb, rfb_sent);
7da36fbd JP	496	/*
	497	tcp_err(pcb, rfb_err);
	498	tcp_poll(pcb, rfb_poll, 2);
	499	*/
	500	tcp_write(pcb, "RFB 003.008\n", 12, 0);
	501	tcp_output(pcb);
	502
	503	return ERR_OK;
	504	}
	505
	506	void rfb_init() {
	507	struct tcp_pcb *pcb;
	508
	509	init_server_info();
	510
	511	pcb = tcp_new();
	512	tcp_bind(pcb, IP_ADDR_ANY, RFB_PORT);
	513	pcb = tcp_listen(pcb);
	514	tcp_accept(pcb, rfb_accept);
	515	}