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#include <assert.h>
#include <stdlib.h>
#include <limits.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "inputstream.h"
#include "outputstream.h"
#include "protocol-simple.h"
#include "client.h"
struct connection {
struct protocol_simple *protocol;
struct iochannel *io;
struct input_stream *istream;
struct output_stream *ostream;
struct client *client;
};
struct protocol_simple {
struct core *core;
struct socket_server*server;
struct idxset *connections;
enum protocol_simple_mode mode;
};
#define BUFSIZE PIPE_BUF
static void free_connection(void *data, void *userdata) {
struct connection *c = data;
assert(data);
if (c->istream)
input_stream_free(c->istream);
if (c->ostream)
output_stream_free(c->ostream);
client_free(c->client);
iochannel_free(c->io);
free(c);
}
static void io_callback(struct iochannel*io, void *userdata) {
struct connection *c = userdata;
assert(io && c);
if (c->istream && iochannel_is_readable(io)) {
struct memchunk chunk;
ssize_t r;
chunk.memblock = memblock_new(BUFSIZE);
assert(chunk.memblock);
if ((r = iochannel_read(io, chunk.memblock->data, BUFSIZE)) <= 0) {
fprintf(stderr, "read(): %s\n", r == 0 ? "EOF" : strerror(errno));
memblock_unref(chunk.memblock);
goto fail;
}
chunk.memblock->length = r;
chunk.length = r;
chunk.index = 0;
memblockq_push(c->istream->memblockq, &chunk, 0);
input_stream_notify(c->istream);
memblock_unref(chunk.memblock);
}
if (c->ostream && iochannel_is_writable(io)) {
struct memchunk chunk;
ssize_t r;
memblockq_peek(c->ostream->memblockq, &chunk);
assert(chunk.memblock && chunk.length);
if ((r = iochannel_write(io, chunk.memblock->data+chunk.index, chunk.length)) < 0) {
fprintf(stderr, "write(): %s\n", strerror(errno));
memblock_unref(chunk.memblock);
goto fail;
}
memblockq_drop(c->ostream->memblockq, r);
memblock_unref(chunk.memblock);
}
return;
fail:
idxset_remove_by_data(c->protocol->connections, c, NULL);
free_connection(c, NULL);
}
static void on_connection(struct socket_server*s, struct iochannel *io, void *userdata) {
struct protocol_simple *p = userdata;
struct connection *c = NULL;
assert(s && io && p);
c = malloc(sizeof(struct connection));
assert(c);
c->io = io;
c->istream = NULL;
c->ostream = NULL;
c->protocol = p;
if (p->mode & PROTOCOL_SIMPLE_RECORD) {
struct source *source;
if (!(source = core_get_default_source(p->core))) {
fprintf(stderr, "Failed to get default source.\n");
goto fail;
}
c->ostream = output_stream_new(source, &DEFAULT_SAMPLE_SPEC, c->client->name);
assert(c->ostream);
}
if (p->mode & PROTOCOL_SIMPLE_PLAYBACK) {
struct sink *sink;
if (!(sink = core_get_default_sink(p->core))) {
fprintf(stderr, "Failed to get default sink.\n");
goto fail;
}
c->istream = input_stream_new(sink, &DEFAULT_SAMPLE_SPEC, c->client->name);
assert(c->istream);
}
c->client = client_new(p->core, "SIMPLE", "Client");
assert(c->client);
iochannel_set_callback(c->io, io_callback, c);
idxset_put(p->connections, c, NULL);
return;
fail:
if (c) {
if (c->istream)
input_stream_free(c->istream);
if (c->ostream)
output_stream_free(c->ostream);
iochannel_free(c->io);
free(c);
}
}
struct protocol_simple* protocol_simple_new(struct core *core, struct socket_server *server, enum protocol_simple_mode mode) {
struct protocol_simple* p;
assert(core && server && mode <= PROTOCOL_SIMPLE_DUPLEX && mode > 0);
p = malloc(sizeof(struct protocol_simple));
assert(p);
p->core = core;
p->server = server;
p->connections = idxset_new(NULL, NULL);
p->mode = mode;
socket_server_set_callback(p->server, on_connection, p);
return p;
}
void protocol_simple_free(struct protocol_simple *p) {
assert(p);
idxset_free(p->connections, free_connection, NULL);
socket_server_free(p->server);
free(p);
}
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