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-rw-r--r--src/plugins/mail-log/Makefile.am24
-rw-r--r--src/plugins/mail-log/Makefile.in826
-rw-r--r--src/plugins/mail-log/mail-log-plugin.c546
-rw-r--r--src/plugins/mail-log/mail-log-plugin.h9
4 files changed, 1405 insertions, 0 deletions
diff --git a/src/plugins/mail-log/Makefile.am b/src/plugins/mail-log/Makefile.am
new file mode 100644
index 0000000..2f3fbc6
--- /dev/null
+++ b/src/plugins/mail-log/Makefile.am
@@ -0,0 +1,24 @@
+AM_CPPFLAGS = \
+ -I$(top_srcdir)/src/lib \
+ -I$(top_srcdir)/src/lib-mail \
+ -I$(top_srcdir)/src/lib-imap \
+ -I$(top_srcdir)/src/lib-index \
+ -I$(top_srcdir)/src/lib-storage \
+ -I$(top_srcdir)/src/plugins/notify
+
+NOPLUGIN_LDFLAGS =
+lib20_mail_log_plugin_la_LDFLAGS = -module -avoid-version
+
+module_LTLIBRARIES = \
+ lib20_mail_log_plugin.la
+
+if DOVECOT_PLUGIN_DEPS
+lib20_mail_log_plugin_la_LIBADD = \
+ ../notify/lib15_notify_plugin.la
+endif
+
+lib20_mail_log_plugin_la_SOURCES = \
+ mail-log-plugin.c
+
+noinst_HEADERS = \
+ mail-log-plugin.h
diff --git a/src/plugins/mail-log/Makefile.in b/src/plugins/mail-log/Makefile.in
new file mode 100644
index 0000000..3032360
--- /dev/null
+++ b/src/plugins/mail-log/Makefile.in
@@ -0,0 +1,826 @@
+# Makefile.in generated by automake 1.16.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/plugins/mail-log/mail-log-plugin.c b/src/plugins/mail-log/mail-log-plugin.c
new file mode 100644
index 0000000..f01cd0d
--- /dev/null
+++ b/src/plugins/mail-log/mail-log-plugin.c
@@ -0,0 +1,546 @@
+/* Copyright (c) 2007-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "array.h"
+#include "llist.h"
+#include "str.h"
+#include "str-sanitize.h"
+#include "imap-util.h"
+#include "mail-user.h"
+#include "mail-storage-private.h"
+#include "notify-plugin.h"
+#include "mail-log-plugin.h"
+
+
+#define MAILBOX_NAME_LOG_LEN 64
+#define HEADER_LOG_LEN 80
+
+#define MAIL_LOG_USER_CONTEXT(obj) \
+ MODULE_CONTEXT_REQUIRE(obj, mail_log_user_module)
+
+enum mail_log_field {
+ MAIL_LOG_FIELD_UID = 0x01,
+ MAIL_LOG_FIELD_BOX = 0x02,
+ MAIL_LOG_FIELD_MSGID = 0x04,
+ MAIL_LOG_FIELD_PSIZE = 0x08,
+ MAIL_LOG_FIELD_VSIZE = 0x10,
+ MAIL_LOG_FIELD_FLAGS = 0x20,
+ MAIL_LOG_FIELD_FROM = 0x40,
+ MAIL_LOG_FIELD_SUBJECT = 0x80
+};
+#define MAIL_LOG_DEFAULT_FIELDS \
+ (MAIL_LOG_FIELD_UID | MAIL_LOG_FIELD_BOX | \
+ MAIL_LOG_FIELD_MSGID | MAIL_LOG_FIELD_PSIZE)
+
+enum mail_log_event {
+ MAIL_LOG_EVENT_DELETE = 0x01,
+ MAIL_LOG_EVENT_UNDELETE = 0x02,
+ MAIL_LOG_EVENT_EXPUNGE = 0x04,
+ MAIL_LOG_EVENT_SAVE = 0x08,
+ MAIL_LOG_EVENT_COPY = 0x10,
+ MAIL_LOG_EVENT_MAILBOX_CREATE = 0x20,
+ MAIL_LOG_EVENT_MAILBOX_DELETE = 0x40,
+ MAIL_LOG_EVENT_MAILBOX_RENAME = 0x80,
+ MAIL_LOG_EVENT_FLAG_CHANGE = 0x100
+};
+#define MAIL_LOG_DEFAULT_EVENTS \
+ (MAIL_LOG_EVENT_DELETE | MAIL_LOG_EVENT_UNDELETE | \
+ MAIL_LOG_EVENT_EXPUNGE | MAIL_LOG_EVENT_SAVE | MAIL_LOG_EVENT_COPY | \
+ MAIL_LOG_EVENT_MAILBOX_DELETE | MAIL_LOG_EVENT_MAILBOX_RENAME)
+
+static const char *field_names[] = {
+ "uid",
+ "box",
+ "msgid",
+ "size",
+ "vsize",
+ "flags",
+ "from",
+ "subject",
+ NULL
+};
+
+static const char *event_names[] = {
+ "delete",
+ "undelete",
+ "expunge",
+ "save",
+ "copy",
+ "mailbox_create",
+ "mailbox_delete",
+ "mailbox_rename",
+ "flag_change",
+ NULL
+};
+
+struct mail_log_user {
+ union mail_user_module_context module_ctx;
+
+ enum mail_log_field fields;
+ enum mail_log_event events;
+ bool cached_only;
+};
+
+struct mail_log_message {
+ struct mail_log_message *prev, *next;
+
+ enum mail_log_event event;
+ bool ignore;
+ const char *pretext, *text;
+};
+
+struct mail_log_mail_txn_context {
+ pool_t pool;
+ struct mail_log_message *messages, *messages_tail;
+};
+
+static MODULE_CONTEXT_DEFINE_INIT(mail_log_user_module,
+ &mail_user_module_register);
+
+static enum mail_log_field mail_log_field_find(const char *name)
+{
+ unsigned int i;
+
+ for (i = 0; field_names[i] != NULL; i++) {
+ if (strcmp(name, field_names[i]) == 0)
+ return 1 << i;
+ }
+ return 0;
+}
+
+static enum mail_log_event mail_log_event_find(const char *name)
+{
+ unsigned int i;
+
+ if (strcmp(name, "append") == 0) {
+ /* v1.x backwards compatibility */
+ name = "save";
+ }
+ for (i = 0; event_names[i] != NULL; i++) {
+ if (strcmp(name, event_names[i]) == 0)
+ return 1 << i;
+ }
+ return 0;
+}
+
+static enum mail_log_field mail_log_parse_fields(const char *str)
+{
+ const char *const *tmp;
+ static enum mail_log_field field, fields = 0;
+
+ for (tmp = t_strsplit_spaces(str, ", "); *tmp != NULL; tmp++) {
+ field = mail_log_field_find(*tmp);
+ if (field == 0)
+ i_fatal("Unknown field in mail_log_fields: '%s'", *tmp);
+ fields |= field;
+ }
+ return fields;
+}
+
+static enum mail_log_event mail_log_parse_events(const char *str)
+{
+ const char *const *tmp;
+ static enum mail_log_event event, events = 0;
+
+ for (tmp = t_strsplit_spaces(str, ", "); *tmp != NULL; tmp++) {
+ event = mail_log_event_find(*tmp);
+ if (event == 0)
+ i_fatal("Unknown event in mail_log_events: '%s'", *tmp);
+ events |= event;
+ }
+ return events;
+}
+
+static void mail_log_mail_user_created(struct mail_user *user)
+{
+ struct mail_log_user *muser;
+ const char *str;
+
+ muser = p_new(user->pool, struct mail_log_user, 1);
+ MODULE_CONTEXT_SET(user, mail_log_user_module, muser);
+
+ str = mail_user_plugin_getenv(user, "mail_log_fields");
+ muser->fields = str == NULL ? MAIL_LOG_DEFAULT_FIELDS :
+ mail_log_parse_fields(str);
+
+ str = mail_user_plugin_getenv(user, "mail_log_events");
+ muser->events = str == NULL ? MAIL_LOG_DEFAULT_EVENTS :
+ mail_log_parse_events(str);
+
+ muser->cached_only =
+ mail_user_plugin_getenv_bool(user, "mail_log_cached_only");
+}
+
+static void mail_log_append_mailbox_name(string_t *str, struct mail *mail)
+{
+ const char *mailbox_str;
+
+ mailbox_str = mailbox_get_vname(mail->box);
+ str_printfa(str, "box=%s",
+ str_sanitize(mailbox_str, MAILBOX_NAME_LOG_LEN));
+}
+
+static void
+mail_log_append_mail_header(string_t *str, struct mail *mail,
+ const char *name, const char *header)
+{
+ const char *value;
+
+ if (mail_get_first_header_utf8(mail, header, &value) <= 0)
+ value = "";
+ str_printfa(str, "%s=%s", name, str_sanitize(value, HEADER_LOG_LEN));
+}
+
+static void
+mail_log_append_uid(struct mail_log_mail_txn_context *ctx,
+ struct mail_log_message *msg, string_t *str, uint32_t uid)
+{
+ if (uid != 0)
+ str_printfa(str, "uid=%u", uid);
+ else {
+ /* we don't know the uid yet, assign it later */
+ str_printfa(str, "uid=");
+ msg->pretext = p_strdup(ctx->pool, str_c(str));
+ str_truncate(str, 0);
+ }
+}
+
+static void
+mail_log_update_wanted_fields(struct mail *mail, enum mail_log_field fields)
+{
+ enum mail_fetch_field wanted_fields = 0;
+ struct mailbox_header_lookup_ctx *wanted_headers = NULL;
+ const char *headers[4];
+ unsigned int hdr_idx = 0;
+
+ if ((fields & MAIL_LOG_FIELD_MSGID) != 0)
+ headers[hdr_idx++] = "Message-ID";
+ if ((fields & MAIL_LOG_FIELD_FROM) != 0)
+ headers[hdr_idx++] = "From";
+ if ((fields & MAIL_LOG_FIELD_SUBJECT) != 0)
+ headers[hdr_idx++] = "Subject";
+ if (hdr_idx > 0) {
+ i_assert(hdr_idx < N_ELEMENTS(headers));
+ headers[hdr_idx] = NULL;
+ wanted_headers = mailbox_header_lookup_init(mail->box, headers);
+ }
+
+ if ((fields & MAIL_LOG_FIELD_PSIZE) != 0)
+ wanted_fields |= MAIL_FETCH_PHYSICAL_SIZE;
+ if ((fields & MAIL_LOG_FIELD_VSIZE) != 0)
+ wanted_fields |= MAIL_FETCH_VIRTUAL_SIZE;
+
+ mail_add_temp_wanted_fields(mail, wanted_fields, wanted_headers);
+ mailbox_header_lookup_unref(&wanted_headers);
+}
+
+static void
+mail_log_append_mail_message_real(struct mail_log_mail_txn_context *ctx,
+ struct mail *mail, enum mail_log_event event,
+ const char *desc)
+{
+ struct mail_log_user *muser =
+ MAIL_LOG_USER_CONTEXT(mail->box->storage->user);
+ struct mail_log_message *msg;
+ string_t *text;
+ uoff_t size;
+
+ msg = p_new(ctx->pool, struct mail_log_message, 1);
+
+ /* avoid parsing through the message multiple times */
+ mail_log_update_wanted_fields(mail, muser->fields);
+
+ text = t_str_new(128);
+ str_append(text, desc);
+ str_append(text, ": ");
+ if ((muser->fields & MAIL_LOG_FIELD_BOX) != 0) {
+ mail_log_append_mailbox_name(text, mail);
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_UID) != 0) {
+ if (event != MAIL_LOG_EVENT_SAVE &&
+ event != MAIL_LOG_EVENT_COPY)
+ mail_log_append_uid(ctx, msg, text, mail->uid);
+ else {
+ /* with mbox mail->uid contains the uid, but handle
+ this consistently with all mailbox formats */
+ mail_log_append_uid(ctx, msg, text, 0);
+ }
+ /* make sure UID is assigned to this mail */
+ mail->transaction->flags |= MAILBOX_TRANSACTION_FLAG_ASSIGN_UIDS;
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_MSGID) != 0) {
+ mail_log_append_mail_header(text, mail, "msgid", "Message-ID");
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_PSIZE) != 0) {
+ if (mail_get_physical_size(mail, &size) == 0)
+ str_printfa(text, "size=%"PRIuUOFF_T, size);
+ else
+ str_printfa(text, "size=error");
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_VSIZE) != 0) {
+ if (mail_get_virtual_size(mail, &size) == 0)
+ str_printfa(text, "vsize=%"PRIuUOFF_T, size);
+ else
+ str_printfa(text, "vsize=error");
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_FROM) != 0) {
+ mail_log_append_mail_header(text, mail, "from", "From");
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_SUBJECT) != 0) {
+ mail_log_append_mail_header(text, mail, "subject", "Subject");
+ str_append(text, ", ");
+ }
+ if ((muser->fields & MAIL_LOG_FIELD_FLAGS) != 0) {
+ str_printfa(text, "flags=(");
+ imap_write_flags(text, mail_get_flags(mail),
+ mail_get_keywords(mail));
+ str_append(text, "), ");
+ }
+ str_truncate(text, str_len(text)-2);
+
+ msg->event = event;
+ msg->text = p_strdup(ctx->pool, str_c(text));
+ DLLIST2_APPEND(&ctx->messages, &ctx->messages_tail, msg);
+}
+
+static void mail_log_add_dummy_msg(struct mail_log_mail_txn_context *ctx,
+ enum mail_log_event event)
+{
+ struct mail_log_message *msg;
+
+ msg = p_new(ctx->pool, struct mail_log_message, 1);
+ msg->event = event;
+ msg->ignore = TRUE;
+ DLLIST2_APPEND(&ctx->messages, &ctx->messages_tail, msg);
+}
+
+static void
+mail_log_append_mail_message(struct mail_log_mail_txn_context *ctx,
+ struct mail *mail, enum mail_log_event event,
+ const char *desc)
+{
+ struct mail_log_user *muser =
+ MAIL_LOG_USER_CONTEXT(mail->box->storage->user);
+
+ if ((muser->events & event) == 0) {
+ if (event == MAIL_LOG_EVENT_SAVE ||
+ event == MAIL_LOG_EVENT_COPY)
+ mail_log_add_dummy_msg(ctx, event);
+ return;
+ }
+
+ T_BEGIN {
+ enum mail_lookup_abort orig_lookup_abort = mail->lookup_abort;
+
+ if (event != MAIL_LOG_EVENT_SAVE && muser->cached_only)
+ mail->lookup_abort = MAIL_LOOKUP_ABORT_NOT_IN_CACHE;
+ mail_log_append_mail_message_real(ctx, mail, event, desc);
+ mail->lookup_abort = orig_lookup_abort;
+ } T_END;
+}
+
+static void *
+mail_log_mail_transaction_begin(struct mailbox_transaction_context *t ATTR_UNUSED)
+{
+ pool_t pool;
+ struct mail_log_mail_txn_context *ctx;
+
+ pool = pool_alloconly_create("mail-log", 2048);
+ ctx = p_new(pool, struct mail_log_mail_txn_context, 1);
+ ctx->pool = pool;
+ return ctx;
+}
+
+static void mail_log_mail_save(void *txn, struct mail *mail)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+
+ mail_log_append_mail_message(ctx, mail, MAIL_LOG_EVENT_SAVE, "save");
+}
+
+static void mail_log_mail_copy(void *txn, struct mail *src, struct mail *dst)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+ struct mail_private *src_pmail = (struct mail_private *)src;
+ struct mailbox *src_box = src->box;
+ const char *desc;
+
+ if (src_pmail->vmail != NULL) {
+ /* copying a mail from virtual storage. src points to the
+ backend mail, but we want to log the virtual mailbox name. */
+ src_box = src_pmail->vmail->box;
+ }
+ desc = t_strdup_printf("copy from %s",
+ str_sanitize(mailbox_get_vname(src_box),
+ MAILBOX_NAME_LOG_LEN));
+ mail_log_append_mail_message(ctx, dst,
+ MAIL_LOG_EVENT_COPY, desc);
+}
+
+static void mail_log_mail_expunge(void *txn, struct mail *mail)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+ struct mail_private *p = (struct mail_private*)mail;
+
+ mail_log_append_mail_message(ctx, mail, MAIL_LOG_EVENT_EXPUNGE,
+ p->autoexpunged ? "autoexpunge" : "expunge");
+}
+
+static void mail_log_mail_update_flags(void *txn, struct mail *mail,
+ enum mail_flags old_flags)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+ enum mail_flags new_flags = mail_get_flags(mail);
+
+ if (((old_flags ^ new_flags) & MAIL_DELETED) == 0) {
+ mail_log_append_mail_message(ctx, mail,
+ MAIL_LOG_EVENT_FLAG_CHANGE,
+ "flag_change");
+ } else if ((old_flags & MAIL_DELETED) == 0) {
+ mail_log_append_mail_message(ctx, mail, MAIL_LOG_EVENT_DELETE,
+ "delete");
+ } else {
+ mail_log_append_mail_message(ctx, mail, MAIL_LOG_EVENT_UNDELETE,
+ "undelete");
+ }
+}
+
+static void
+mail_log_mail_update_keywords(void *txn, struct mail *mail,
+ const char *const *old_keywords ATTR_UNUSED)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+
+ mail_log_append_mail_message(ctx, mail, MAIL_LOG_EVENT_FLAG_CHANGE,
+ "flag_change");
+}
+
+static void mail_log_save(const struct mail_log_message *msg, uint32_t uid)
+{
+ if (msg->ignore) {
+ /* not logging this save/copy */
+ } else if (msg->pretext == NULL)
+ i_info("%s", msg->text);
+ else if (uid != 0)
+ i_info("%s%u%s", msg->pretext, uid, msg->text);
+ else
+ i_info("%serror%s", msg->pretext, msg->text);
+}
+
+static void
+mail_log_mail_transaction_commit(void *txn,
+ struct mail_transaction_commit_changes *changes)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+ struct mail_log_message *msg;
+ struct seq_range_iter iter;
+ unsigned int n = 0;
+ uint32_t uid;
+
+ seq_range_array_iter_init(&iter, &changes->saved_uids);
+ for (msg = ctx->messages; msg != NULL; msg = msg->next) {
+ if (msg->event == MAIL_LOG_EVENT_SAVE ||
+ msg->event == MAIL_LOG_EVENT_COPY) {
+ if (!seq_range_array_iter_nth(&iter, n++, &uid))
+ uid = 0;
+ mail_log_save(msg, uid);
+ } else {
+ i_assert(msg->pretext == NULL);
+ i_info("%s", msg->text);
+ }
+ }
+ i_assert(!seq_range_array_iter_nth(&iter, n, &uid));
+
+ pool_unref(&ctx->pool);
+}
+
+static void mail_log_mail_transaction_rollback(void *txn)
+{
+ struct mail_log_mail_txn_context *ctx =
+ (struct mail_log_mail_txn_context *)txn;
+
+ pool_unref(&ctx->pool);
+}
+
+static void
+mail_log_mailbox_create(struct mailbox *box)
+{
+ struct mail_log_user *muser = MAIL_LOG_USER_CONTEXT(box->storage->user);
+
+ if ((muser->events & MAIL_LOG_EVENT_MAILBOX_CREATE) == 0)
+ return;
+
+ i_info("Mailbox created: %s",
+ str_sanitize(mailbox_get_vname(box), MAILBOX_NAME_LOG_LEN));
+}
+
+static void
+mail_log_mailbox_delete_commit(void *txn ATTR_UNUSED, struct mailbox *box)
+{
+ struct mail_log_user *muser = MAIL_LOG_USER_CONTEXT(box->storage->user);
+
+ if ((muser->events & MAIL_LOG_EVENT_MAILBOX_DELETE) == 0)
+ return;
+
+ i_info("Mailbox deleted: %s",
+ str_sanitize(mailbox_get_vname(box), MAILBOX_NAME_LOG_LEN));
+}
+
+static void
+mail_log_mailbox_rename(struct mailbox *src, struct mailbox *dest)
+{
+ struct mail_log_user *muser = MAIL_LOG_USER_CONTEXT(src->storage->user);
+
+ if ((muser->events & MAIL_LOG_EVENT_MAILBOX_RENAME) == 0)
+ return;
+
+ i_info("Mailbox renamed: %s -> %s",
+ str_sanitize(mailbox_get_vname(src), MAILBOX_NAME_LOG_LEN),
+ str_sanitize(mailbox_get_vname(dest), MAILBOX_NAME_LOG_LEN));
+}
+
+static const struct notify_vfuncs mail_log_vfuncs = {
+ .mail_transaction_begin = mail_log_mail_transaction_begin,
+ .mail_save = mail_log_mail_save,
+ .mail_copy = mail_log_mail_copy,
+ .mail_expunge = mail_log_mail_expunge,
+ .mail_update_flags = mail_log_mail_update_flags,
+ .mail_update_keywords = mail_log_mail_update_keywords,
+ .mail_transaction_commit = mail_log_mail_transaction_commit,
+ .mail_transaction_rollback = mail_log_mail_transaction_rollback,
+ .mailbox_create = mail_log_mailbox_create,
+ .mailbox_delete_commit = mail_log_mailbox_delete_commit,
+ .mailbox_rename = mail_log_mailbox_rename
+};
+
+static struct notify_context *mail_log_ctx;
+
+static struct mail_storage_hooks mail_log_mail_storage_hooks = {
+ .mail_user_created = mail_log_mail_user_created
+};
+
+void mail_log_plugin_init(struct module *module)
+{
+ mail_log_ctx = notify_register(&mail_log_vfuncs);
+ mail_storage_hooks_add(module, &mail_log_mail_storage_hooks);
+}
+
+void mail_log_plugin_deinit(void)
+{
+ mail_storage_hooks_remove(&mail_log_mail_storage_hooks);
+ notify_unregister(mail_log_ctx);
+}
+
+const char *mail_log_plugin_dependencies[] = { "notify", NULL };
diff --git a/src/plugins/mail-log/mail-log-plugin.h b/src/plugins/mail-log/mail-log-plugin.h
new file mode 100644
index 0000000..0af47ac
--- /dev/null
+++ b/src/plugins/mail-log/mail-log-plugin.h
@@ -0,0 +1,9 @@
+#ifndef MAIL_LOG_PLUGIN_H
+#define MAIL_LOG_PLUGIN_H
+
+extern const char *mail_log_plugin_dependencies[];
+
+void mail_log_plugin_init(struct module *module);
+void mail_log_plugin_deinit(void);
+
+#endif