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/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "llist.h"
#include "ioloop.h"
#include "istream.h"
#include "ostream.h"
#include "master-service.h"
#include "ipc-group.h"
#include "ipc-connection.h"
#include "client.h"
#include <unistd.h>
struct client {
struct client *prev, *next;
int fd;
struct io *io;
struct istream *input;
struct ostream *output;
};
static struct client *clients;
static void client_input(struct client *client);
static void
client_cmd_input(enum ipc_cmd_status status, const char *line, void *context)
{
struct client *client = context;
char chr = '\0';
switch (status) {
case IPC_CMD_STATUS_REPLY:
chr = ':';
break;
case IPC_CMD_STATUS_OK:
chr = '+';
break;
case IPC_CMD_STATUS_ERROR:
chr = '-';
break;
}
T_BEGIN {
o_stream_nsend_str(client->output,
t_strdup_printf("%c%s\n", chr, line));
} T_END;
if (status != IPC_CMD_STATUS_REPLY && client->io == NULL) {
client->io = io_add(client->fd, IO_READ, client_input, client);
client_input(client);
}
}
static void client_input(struct client *client)
{
struct ipc_group *group;
struct ipc_connection *conn;
char *line, *id, *data;
unsigned int id_num;
bool ret;
while ((line = i_stream_read_next_line(client->input)) != NULL) {
/* <ipc name> *|<id> <command> */
id = strchr(line, '\t');
if (id == NULL)
data = NULL;
else {
*id++ = '\0';
data = strchr(id, '\t');
}
if (data == NULL || data[1] == '\0') {
o_stream_nsend_str(client->output, "-Invalid input\n");
continue;
}
*data++ = '\0';
group = ipc_group_lookup_name(line);
ret = FALSE;
if (strcmp(id, "*") == 0) {
/* send to everyone */
if (group == NULL) {
client_cmd_input(IPC_CMD_STATUS_OK, "", client);
} else {
ret = ipc_group_cmd(group, data,
client_cmd_input, client);
}
} else if (str_to_uint(id, &id_num) < 0) {
o_stream_nsend_str(client->output,
t_strdup_printf("-Invalid IPC connection id: %s\n", id));
continue;
} else if (group == NULL) {
o_stream_nsend_str(client->output,
t_strdup_printf("-Unknown IPC group: %s\n", line));
} else if ((conn = ipc_connection_lookup_id(group, id_num)) == NULL) {
o_stream_nsend_str(client->output,
t_strdup_printf("-Unknown IPC connection id: %u\n", id_num));
continue;
} else {
ipc_connection_cmd(conn, data, client_cmd_input, client);
ret = TRUE;
}
if (ret) {
/* we'll handle commands one at a time. stop reading
input until this command is finished. */
io_remove(&client->io);
break;
}
}
if (client->input->eof || client->input->stream_errno != 0)
client_destroy(&client);
}
struct client *client_create(int fd)
{
struct client *client;
client = i_new(struct client, 1);
client->fd = fd;
client->io = io_add(fd, IO_READ, client_input, client);
client->input = i_stream_create_fd(fd, SIZE_MAX);
client->output = o_stream_create_fd(fd, SIZE_MAX);
o_stream_set_no_error_handling(client->output, TRUE);
DLLIST_PREPEND(&clients, client);
return client;
}
void client_destroy(struct client **_client)
{
struct client *client = *_client;
*_client = NULL;
DLLIST_REMOVE(&clients, client);
io_remove(&client->io);
i_stream_destroy(&client->input);
o_stream_destroy(&client->output);
if (close(client->fd) < 0)
i_error("close(client) failed: %m");
i_free(client);
master_service_client_connection_destroyed(master_service);
}
void clients_destroy_all(void)
{
while (clients != NULL) {
struct client *client = clients;
client_destroy(&client);
}
}
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