#include "buffer.h"
#include "common.h"
-#include "epoll.h"
#include "policy_tokens.h"
#include "server.h"
-#include "query.h"
#include "config.h"
+#include "query.h"
#define DAEMON_NAME "postlicyd"
+#define DAEMON_VERSION "0.4"
#define DEFAULT_PORT 10000
#define RUNAS_USER "nobody"
#define RUNAS_GROUP "nogroup"
DECLARE_MAIN
-static void *query_starter(server_t* server)
+typedef struct query_context_t {
+ query_t query;
+ filter_context_t context;
+ client_t *client;
+} query_context_t;
+
+static config_t *config = NULL;
+static bool refresh = false;
+static PA(client_t) busy = ARRAY_INIT;
+
+static void *query_starter(listener_t* server)
{
- return query_new();
+ query_context_t *context = p_new(query_context_t, 1);
+ filter_context_prepare(&context->context, context);
+ return context;
}
-static bool config_refresh(void *config)
+static void query_stopper(void *data)
{
- return config_reload(config);
+ query_context_t **context = data;
+ if (*context) {
+ filter_context_wipe(&(*context)->context);
+ p_delete(context);
+ }
}
-__attribute__((format(printf,2,0)))
-static void policy_answer(server_t *pcy, const char *fmt, ...)
+static bool config_refresh(void *mconfig)
{
- va_list args;
- const query_t* query = pcy->data;
-
- buffer_addstr(&pcy->obuf, "action=");
- va_start(args, fmt);
- buffer_addvf(&pcy->obuf, fmt, args);
- va_end(args);
- buffer_addstr(&pcy->obuf, "\n\n");
- buffer_consume(&pcy->ibuf, query->eoq - pcy->ibuf.data);
- epoll_modify(pcy->fd, EPOLLIN | EPOLLOUT, pcy);
+ refresh = true;
+ if (filter_running > 0) {
+ return true;
+ }
+ bool ret = config_reload(mconfig);
+ foreach (client_t **server, busy) {
+ client_io_ro(*server);
+ }}
+ array_len(busy) = 0;
+ refresh = false;
+ return ret;
+}
+
+static void policy_answer(client_t *pcy, const char *message)
+{
+ query_context_t *context = client_data(pcy);
+ const query_t* query = &context->query;
+ buffer_t *buf = client_output_buffer(pcy);
+
+ /* Write reply "action=ACTION [text]" */
+ buffer_addstr(buf, "action=");
+ buffer_ensure(buf, m_strlen(message) + 64);
+
+ ssize_t size = array_size(*buf) - array_len(*buf);
+ ssize_t format_size = query_format(array_ptr(*buf, array_len(*buf)),
+ size, message, query);
+ if (format_size == -1) {
+ buffer_addstr(buf, message);
+ } else if (format_size > size) {
+ buffer_ensure(buf, format_size + 1);
+ query_format(array_ptr(*buf, array_len(*buf)),
+ array_size(*buf) - array_len(*buf),
+ message, query);
+ array_len(*buf) += format_size;
+ } else {
+ array_len(*buf) += format_size;
+ }
+ buffer_addstr(buf, "\n\n");
+
+ /* Finalize query. */
+ buf = client_input_buffer(pcy);
+ buffer_consume(buf, query->eoq - buf->data);
+ client_io_rw(pcy);
}
-static bool policy_process(server_t *pcy, const config_t *config)
+static const filter_t *next_filter(client_t *pcy, const filter_t *filter,
+ const query_t *query, const filter_hook_t *hook, bool *ok) {
+#define MESSAGE_FORMAT "request client=%s from=<%s> to=<%s> at %s: "
+#define MESSAGE_PARAMS query->client_name, \
+ query->sender == NULL ? "undefined" : query->sender, \
+ query->recipient == NULL ? "undefined" : query->recipient, \
+ smtp_state_names[query->state]
+
+ if (hook != NULL) {
+ query_context_t *context = client_data(pcy);
+ if (hook->counter >= 0 && hook->counter < MAX_COUNTERS && hook->cost > 0) {
+ context->context.counters[hook->counter] += hook->cost;
+ debug(MESSAGE_FORMAT "added %d to counter %d (now %u)", MESSAGE_PARAMS,
+ hook->cost, hook->counter, context->context.counters[hook->counter]);
+ }
+ }
+ if (hook == NULL) {
+ warn(MESSAGE_FORMAT "aborted", MESSAGE_PARAMS);
+ *ok = false;
+ return NULL;
+ } else if (hook->async) {
+ debug(MESSAGE_FORMAT "asynchronous filter from filter %s",
+ MESSAGE_PARAMS, filter->name);
+ *ok = true;
+ return NULL;
+ } else if (hook->postfix) {
+ info(MESSAGE_FORMAT "awswer %s from filter %s: \"%s\"", MESSAGE_PARAMS,
+ htokens[hook->type], filter->name, hook->value);
+ policy_answer(pcy, hook->value);
+ *ok = true;
+ return NULL;
+ } else {
+ debug(MESSAGE_FORMAT "awswer %s from filter %s: next filter %s",
+ MESSAGE_PARAMS, htokens[hook->type], filter->name,
+ (array_ptr(config->filters, hook->filter_id))->name);
+ return array_ptr(config->filters, hook->filter_id);
+ }
+#undef MESSAGE_PARAMS
+#undef MESSAGE_FORMAT
+}
+
+static bool policy_process(client_t *pcy, const config_t *mconfig)
{
- const query_t* query = pcy->data;
+ query_context_t *context = client_data(pcy);
+ const query_t* query = &context->query;
const filter_t *filter;
- if (config->entry_points[query->state] == -1) {
- syslog(LOG_WARNING, "no filter defined for current protocol_state (%d)", query->state);
+ if (mconfig->entry_points[query->state] == -1) {
+ warn("no filter defined for current protocol_state (%s)", smtp_state_names[query->state]);
return false;
}
- filter = array_ptr(config->filters, config->entry_points[query->state]);
+ if (context->context.current_filter != NULL) {
+ filter = context->context.current_filter;
+ } else {
+ filter = array_ptr(mconfig->filters, mconfig->entry_points[query->state]);
+ }
+ context->context.current_filter = NULL;
while (true) {
- const filter_hook_t *hook = filter_run(filter, query);
- if (hook == NULL) {
- syslog(LOG_WARNING, "request aborted");
- return false;
- } else if (hook->postfix) {
- policy_answer(pcy, "%s", hook->value);
- return true;
- } else {
- filter = array_ptr(config->filters, hook->filter_id);
+ bool ok = false;
+ const filter_hook_t *hook = filter_run(filter, query, &context->context);
+ filter = next_filter(pcy, filter, query, hook, &ok);
+ if (filter == NULL) {
+ return ok;
}
}
}
-static int policy_run(server_t *pcy, void* vconfig)
+static int policy_run(client_t *pcy, void* vconfig)
{
- ssize_t search_offs = MAX(0, (ssize_t)(pcy->ibuf.len - 1));
- int nb = buffer_read(&pcy->ibuf, pcy->fd, -1);
+ const config_t *mconfig = vconfig;
+ if (refresh) {
+ array_add(busy, pcy);
+ return 0;
+ }
+
+ query_context_t *context = client_data(pcy);
+ query_t *query = &context->query;
+ context->client = pcy;
+
+ buffer_t *buf = client_input_buffer(pcy);
+ int search_offs = MAX(0, (int)(buf->len - 1));
+ int nb = client_read(pcy);
const char *eoq;
- query_t *query = pcy->data;
- const config_t *config = vconfig;
if (nb < 0) {
if (errno == EAGAIN || errno == EINTR)
return -1;
}
if (nb == 0) {
- if (pcy->ibuf.len)
- syslog(LOG_ERR, "unexpected end of data");
+ if (buf->len)
+ err("unexpected end of data");
return -1;
}
- if (!(eoq = strstr(pcy->ibuf.data + search_offs, "\n\n")))
+ if (!(eoq = strstr(buf->data + search_offs, "\n\n"))) {
return 0;
+ }
- if (!query_parse(pcy->data, pcy->ibuf.data))
+ if (!query_parse(query, buf->data)) {
return -1;
+ }
query->eoq = eoq + strlen("\n\n");
- epoll_modify(pcy->fd, 0, pcy);
- return policy_process(pcy, config) ? 0 : -1;
+
+ /* The instance changed => reset the static context */
+ if (query->instance == NULL || strcmp(context->context.instance, query->instance) != 0) {
+ filter_context_clean(&context->context);
+ m_strcat(context->context.instance, 64, query->instance);
+ }
+ client_io_none(pcy);
+ return policy_process(pcy, mconfig) ? 0 : -1;
+}
+
+static void policy_async_handler(filter_context_t *context,
+ const filter_hook_t *hook)
+{
+ bool ok = false;
+ const filter_t *filter = context->current_filter;
+ query_context_t *qctx = context->data;
+ query_t *query = &qctx->query;
+ client_t *server = qctx->client;
+
+ context->current_filter = next_filter(server, filter, query, hook, &ok);
+ if (context->current_filter != NULL) {
+ ok = policy_process(server, config);
+ }
+ if (!ok) {
+ client_release(server);
+ }
+ if (refresh && filter_running == 0) {
+ config_refresh(config);
+ }
+}
+
+static int postlicyd_init(void)
+{
+ filter_async_handler_register(policy_async_handler);
+ return 0;
}
-int start_listener(int port)
+static void postlicyd_shutdown(void)
{
- return start_server(port, NULL, NULL);
+ array_deep_wipe(busy, client_delete);
}
+module_init(postlicyd_init);
+module_exit(postlicyd_shutdown);
/* administrivia {{{ */
" -l <port> port to listen to\n"
" -p <pidfile> file to write our pid to\n"
" -f stay in foreground\n"
+ " -d grow logging level\n"
+ " -u unsafe mode (don't drop privileges)\n"
, stderr);
}
int port = DEFAULT_PORT;
bool port_from_cli = false;
- for (int c = 0; (c = getopt(argc, argv, "hf" "l:p:")) >= 0; ) {
+ for (int c = 0; (c = getopt(argc, argv, "ufd" "l:p:")) >= 0; ) {
switch (c) {
case 'p':
pidfile = optarg;
case 'f':
daemonize = false;
break;
+ case 'd':
+ ++log_level;
+ break;
default:
usage();
return EXIT_FAILURE;
}
}
+ if (!daemonize) {
+ log_syslog = false;
+ }
+
if (argc - optind != 1) {
usage();
return EXIT_FAILURE;
}
+ info("%s v%s...", DAEMON_NAME, DAEMON_VERSION);
+
+ if (pidfile_open(pidfile) < 0) {
+ crit("unable to write pidfile %s", pidfile);
+ return EXIT_FAILURE;
+ }
+
if (drop_privileges(RUNAS_USER, RUNAS_GROUP) < 0) {
- syslog(LOG_CRIT, "unable to drop privileges");
+ crit("unable to drop privileges");
return EXIT_FAILURE;
}
- config_t *config = config_read(argv[optind]);
+ config = config_read(argv[optind]);
if (config == NULL) {
return EXIT_FAILURE;
}
config->port = port;
}
- if (common_setup(pidfile, true, NULL, NULL, daemonize) != EXIT_SUCCESS
- || start_listener(config->port) < 0) {
- config_delete(&config);
+ if (daemonize && daemon_detach() < 0) {
+ crit("unable to fork");
+ return EXIT_FAILURE;
+ }
+
+ pidfile_refresh();
+
+ if (start_listener(config->port) == NULL) {
return EXIT_FAILURE;
} else {
- int res = server_loop(query_starter, (delete_client_t)query_delete,
- policy_run, config_refresh, config);
- config_delete(&config);
- return res;
+ return server_loop(query_starter, query_stopper,
+ policy_run, config_refresh, config);
}
}
projects / apps / pfixtools.git / blobdiff