diff options
Diffstat (limited to 'pigeonhole/src/managesieve/main.c')
| -rw-r--r-- | pigeonhole/src/managesieve/main.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/pigeonhole/src/managesieve/main.c b/pigeonhole/src/managesieve/main.c new file mode 100644 index 0000000..340b7b6 --- /dev/null +++ b/pigeonhole/src/managesieve/main.c @@ -0,0 +1,400 @@ +/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file + */ + +#include "lib.h" +#include "buffer.h" +#include "ioloop.h" +#include "istream.h" +#include "istream-concat.h" +#include "ostream.h" +#include "path-util.h" +#include "str.h" +#include "base64.h" +#include "process-title.h" +#include "restrict-access.h" +#include "settings-parser.h" +#include "master-interface.h" +#include "master-service.h" +#include "master-login.h" +#include "mail-user.h" +#include "mail-storage-service.h" + +#include "managesieve-common.h" +#include "managesieve-commands.h" +#include "managesieve-capabilities.h" + +#include <stdio.h> +#include <unistd.h> + +#define IS_STANDALONE() \ + (getenv(MASTER_IS_PARENT_ENV) == NULL) + +#define MANAGESIEVE_DIE_IDLE_SECS 10 + +static bool verbose_proctitle = FALSE; +static struct mail_storage_service_ctx *storage_service; +static struct master_login *master_login = NULL; + +void (*hook_client_created)(struct client **client) = NULL; + +struct event_category event_category_managesieve = { + .name = "managesieve", +}; + +void managesieve_refresh_proctitle(void) +{ +#define MANAGESIEVE_PROCTITLE_PREFERRED_LEN 80 + struct client *client; + string_t *title = t_str_new(128); + + if (!verbose_proctitle) + return; + + str_append_c(title, '['); + switch (managesieve_client_count) { + case 0: + str_append(title, "idling"); + break; + case 1: + client = managesieve_clients; + str_append(title, client->user->username); + if (client->user->conn.remote_ip != NULL) { + str_append_c(title, ' '); + str_append(title, + net_ip2addr(client->user->conn.remote_ip)); + } + + if (client->cmd.name != NULL && + str_len(title) <= MANAGESIEVE_PROCTITLE_PREFERRED_LEN) { + str_append_c(title, ' '); + str_append(title, client->cmd.name); + } + break; + default: + str_printfa(title, "%u connections", managesieve_client_count); + break; + } + str_append_c(title, ']'); + process_title_set(str_c(title)); +} + +static void client_kill_idle(struct client *client) +{ + mail_storage_service_io_activate_user(client->service_user); + client_send_bye(client, "Server shutting down."); + client_destroy(client, "Server shutting down."); +} + +static void managesieve_die(void) +{ + struct client *client, *next; + time_t last_io, now = time(NULL); + time_t stop_timestamp = now - MANAGESIEVE_DIE_IDLE_SECS; + unsigned int stop_msecs; + + for (client = managesieve_clients; client != NULL; client = next) { + next = client->next; + + last_io = I_MAX(client->last_input, client->last_output); + if (last_io <= stop_timestamp) + client_kill_idle(client); + else { + timeout_remove(&client->to_idle); + stop_msecs = (last_io - stop_timestamp) * 1000; + client->to_idle = timeout_add(stop_msecs, + client_kill_idle, client); + } + } +} + +static void client_add_istream_prefix(struct client *client, + const buffer_t *input) +{ + struct istream *inputs[] = { + i_stream_create_copy_from_data(input->data, input->used), + client->input, + NULL + }; + client->input = i_stream_create_concat(inputs); + i_stream_copy_fd(client->input, inputs[1]); + i_stream_unref(&inputs[0]); + i_stream_unref(&inputs[1]); + + i_stream_set_input_pending(client->input, TRUE); +} + +static void client_logged_in(struct client *client) +{ + struct ostream *output; + + output = client->output; + o_stream_ref(output); + o_stream_cork(output); + if (!IS_STANDALONE()) + client_send_ok(client, "Logged in."); + (void)client_input(client); + o_stream_uncork(output); + o_stream_unref(&output); +} + +static int +client_create_from_input(const struct mail_storage_service_input *input, + int fd_in, int fd_out, const buffer_t *input_buf, + const char **error_r) +{ + struct mail_storage_service_input service_input; + struct mail_storage_service_user *user; + struct mail_user *mail_user; + struct client *client; + struct managesieve_settings *set; + struct event *event; + const char *error; + + event = event_create(NULL); + event_add_category(event, &event_category_managesieve); + event_add_fields(event, (const struct event_add_field []){ + { .key = "user", .value = input->username }, + { .key = "session", .value = input->session_id }, + { .key = NULL } + }); + + service_input = *input; + service_input.event_parent = event; + if (mail_storage_service_lookup_next(storage_service, &service_input, + &user, &mail_user, error_r) <= 0) { + event_unref(&event); + return -1; + } + restrict_access_allow_coredumps(TRUE); + + set = mail_storage_service_user_get_set(user)[1]; + if (set->verbose_proctitle) + verbose_proctitle = TRUE; + + if (settings_var_expand(&managesieve_setting_parser_info, set, + mail_user->pool, + mail_user_var_expand_table(mail_user), + &error) <= 0) { + i_error("Failed to expand settings: %s", error); + mail_storage_service_user_unref(&user); + mail_user_unref(&mail_user); + event_unref(&event); + return -1; + } + + client = client_create(fd_in, fd_out, input->session_id, + event, mail_user, user, set); + if (input_buf != NULL && input_buf->used > 0) + client_add_istream_prefix(client, input_buf); + client_create_finish(client); + T_BEGIN { + client_logged_in(client); + } T_END; + event_unref(&event); + return 0; +} + +static void main_stdio_run(const char *username) +{ + struct mail_storage_service_input input; + const char *value, *error, *input_base64; + buffer_t *input_buf; + + i_zero(&input); + input.module = "managesieve"; + input.service = "sieve"; + input.username = username != NULL ? username : getenv("USER"); + if (input.username == NULL && IS_STANDALONE()) + input.username = getlogin(); + if (input.username == NULL) + i_fatal("USER environment missing"); + if ((value = getenv("IP")) != NULL) + net_addr2ip(value, &input.remote_ip); + if ((value = getenv("LOCAL_IP")) != NULL) + net_addr2ip(value, &input.local_ip); + + input_base64 = getenv("CLIENT_INPUT"); + input_buf = (input_base64 == NULL ? + NULL : t_base64_decode_str(input_base64)); + + if (client_create_from_input(&input, STDIN_FILENO, STDOUT_FILENO, + input_buf, &error) < 0) + i_fatal("%s", error); +} + +static void +login_client_connected(const struct master_login_client *client, + const char *username, const char *const *extra_fields) +{ +#define MSG_BYE_INTERNAL_ERROR "BYE \""CRITICAL_MSG"\"\r\n" + struct mail_storage_service_input input; + enum mail_auth_request_flags flags = client->auth_req.flags; + const char *error; + buffer_t input_buf; + + i_zero(&input); + input.module = "managesieve"; + input.service = "sieve"; + input.local_ip = client->auth_req.local_ip; + input.remote_ip = client->auth_req.remote_ip; + input.local_port = client->auth_req.local_port; + input.remote_port = client->auth_req.remote_port; + input.username = username; + input.userdb_fields = extra_fields; + input.session_id = client->session_id; + if ((flags & MAIL_AUTH_REQUEST_FLAG_CONN_SECURED) != 0) + input.conn_secured = TRUE; + if ((flags & MAIL_AUTH_REQUEST_FLAG_CONN_SSL_SECURED) != 0) + input.conn_ssl_secured = TRUE; + + buffer_create_from_const_data(&input_buf, client->data, + client->auth_req.data_size); + if (client_create_from_input(&input, client->fd, client->fd, + &input_buf, &error) < 0) { + int fd = client->fd; + + if (write(fd, MSG_BYE_INTERNAL_ERROR, + strlen(MSG_BYE_INTERNAL_ERROR)) < 0) { + if (errno != EAGAIN && errno != EPIPE) + i_error("write(client) failed: %m"); + } + i_error("%s", error); + i_close_fd(&fd); + master_service_client_connection_destroyed(master_service); + } +} + +static void +login_client_failed(const struct master_login_client *client, + const char *errormsg) +{ + const char *msg; + + msg = t_strdup_printf("NO \"%s\"\r\n", errormsg); + if (write(client->fd, msg, strlen(msg)) < 0) { + /* ignored */ + } +} + +static void client_connected(struct master_service_connection *conn) +{ + /* when running standalone, we shouldn't even get here */ + i_assert(master_login != NULL); + + master_service_client_connection_accept(conn); + master_login_add(master_login, conn->fd); +} + +int main(int argc, char *argv[]) +{ + static const struct setting_parser_info *set_roots[] = { + &managesieve_setting_parser_info, + NULL + }; + struct master_login_settings login_set; + enum master_service_flags service_flags = 0; + enum mail_storage_service_flags storage_service_flags = 0; + const char *username = NULL, *error = NULL; + int c; + + i_zero(&login_set); + login_set.postlogin_timeout_secs = MASTER_POSTLOGIN_TIMEOUT_DEFAULT; + + if (IS_STANDALONE() && getuid() == 0 && + net_getpeername(1, NULL, NULL) == 0) { + printf("NO \"managesieve binary must not be started from " + "inetd, use managesieve-login instead.\"\n"); + return 1; + } + + if (IS_STANDALONE() || getenv("DUMP_CAPABILITY") != NULL) { + service_flags |= MASTER_SERVICE_FLAG_STANDALONE | + MASTER_SERVICE_FLAG_STD_CLIENT; + } else { + service_flags |= MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN; + } + if (getenv("DUMP_CAPABILITY") != NULL) { + service_flags |= MASTER_SERVICE_FLAG_DONT_SEND_STATS | + MASTER_SERVICE_FLAG_DISABLE_SSL_SET; + } + + master_service = master_service_init("managesieve", service_flags, + &argc, &argv, "t:u:"); + while ((c = master_getopt(master_service)) > 0) { + switch (c) { + case 't': + if (str_to_uint(optarg, + &login_set.postlogin_timeout_secs) < 0 || + login_set.postlogin_timeout_secs == 0) + i_fatal("Invalid -t parameter: %s", optarg); + break; + case 'u': + storage_service_flags |= + MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP; + username = optarg; + break; + default: + return FATAL_DEFAULT; + } + } + + master_service_set_die_callback(master_service, managesieve_die); + + /* plugins may want to add commands, so this needs to be called early */ + commands_init(); + + /* Dump capabilities if requested */ + if (getenv("DUMP_CAPABILITY") != NULL) { + managesieve_capabilities_dump(); + commands_deinit(); + master_service_deinit(&master_service); + exit(0); + } + + if (t_abspath("auth-master", &login_set.auth_socket_path, &error) < 0) + i_fatal("t_abspath(%s) failed: %s", "auth-master", error); + + if (argv[optind] != NULL && + t_abspath(argv[optind], &login_set.postlogin_socket_path, + &error) < 0) { + i_fatal("t_abspath(%s) failed: %s", argv[optind], error); + } + + login_set.callback = login_client_connected; + login_set.failure_callback = login_client_failed; + + if (!IS_STANDALONE()) + master_login = master_login_init(master_service, &login_set); + + storage_service = + mail_storage_service_init(master_service, + set_roots, storage_service_flags); + master_service_init_finish(master_service); + /* NOTE: login_set.*_socket_path are now invalid due to data stack + having been freed */ + + /* fake that we're running, so we know if client was destroyed + while handling its initial input */ + io_loop_set_running(current_ioloop); + + if (IS_STANDALONE()) { + T_BEGIN { + main_stdio_run(username); + } T_END; + } else { + io_loop_set_running(current_ioloop); + } + + if (io_loop_is_running(current_ioloop)) + master_service_run(master_service, client_connected); + clients_destroy_all(); + + if (master_login != NULL) + master_login_deinit(&master_login); + mail_storage_service_deinit(&storage_service); + + commands_deinit(); + + master_service_deinit(&master_service); + return 0; +} |