+/*
+ * _send_smtp_ensure_init
+ * Make sure the libESMTP support in mutt is initialized at some time.
+ */
+static void _send_smtp_ensure_init ()
+{
+ static int libesmtp_init = 0;
+
+ if (!libesmtp_init) {
+ if (SmtpAuthUser)
+ auth_client_init ();
+ libesmtp_init = 1;
+ }
+}
+
+/*
+ * _send_smtp_perror
+ * Prints 'msg', a colon, and then a string representation of the
+ * libesmtp errno as a mutt error.
+ */
+static void _send_smtp_perror (const char *msg)
+{
+ char buf[512];
+
+ mutt_error ("%s: %s", msg,
+ smtp_strerror (smtp_errno (), buf, sizeof (buf)));
+}
+
+/*
+ * _send_smtp_add_recipients
+ * Adds every address in 'addr' as a recipient to the smtp message
+ * 'message'. Note that this does not mean that they will necessarily
+ * show up in the mail headers (e.g., when bcc'ing). Returns 0 upon
+ * success, -1 upon failure (and prints an error message).
+ *
+ * Very similar to sendlib.c::add_args
+ */
+static int
+_send_smtp_add_recipients (smtp_message_t message, address_t * addr)
+{
+ int ret = 0;
+
+ for (; addr; addr = addr->next) {
+ /* weed out group mailboxes, since those are for display only */
+ if (addr->mailbox && !addr->group) {
+ if (!smtp_add_recipient (message, addr->mailbox))
+ SMTPFAIL ("smtp_add_recipient");
+ }
+ }
+
+Done:
+ return ret;
+}
+
+static int
+_send_smtp_auth_interact (auth_client_request_t request,
+ char **result, int fields,
+ void *arg __attribute__ ((unused)))
+{
+ int i;
+
+ for (i = 0; i < fields; i++) {
+ if (request[i].flags & AUTH_USER) {
+ result[i] = SmtpAuthUser;
+ } else if (request[i].flags & AUTH_PASS) {
+ if (SmtpAuthPass) {
+ result[i] = SmtpAuthPass;
+ } else {
+ if (authpass[0] == '\0') {
+ char prompt[STRING];
+
+ snprintf(prompt, sizeof(prompt), "%s%s: ", request[i].prompt,
+ request[i].flags & AUTH_CLEARTEXT ? " (not encrypted)" :
+ "");
+ mutt_get_field_unbuffered(prompt, authpass, sizeof(authpass),
+ M_PASS);
+ }
+ result[i] = authpass;
+ }
+ }
+ }
+
+ return 1;
+}
+
+#define BUFLEN 8192
+
+static const char *
+_send_smtp_messagefp_cb(void **buf, int *len, void *arg)
+{
+ int octets;
+
+ if (*buf == NULL)
+ *buf = xmalloc(BUFLEN);
+
+ if (len == NULL) {
+ rewind ((FILE *) arg);
+ return NULL;
+ }
+
+ if (fgets (*buf, BUFLEN - 2, (FILE *) arg) == NULL) {
+ octets = 0;
+ }
+ else {
+ char *p = strchr (*buf, '\0');
+
+ if (p[-1] == '\n' && p[-2] != '\r') {
+ m_strcpy(p - 1, (char *) *buf + BUFLEN - p + 1, "\r\n");
+ p++;
+ }
+ octets = p - (char *) *buf;
+ }
+
+ *len = octets;
+ return *buf;
+}
+
+static void event_cb (smtp_session_t session __attribute__ ((unused)),
+ int event_no, void *arg,...)
+{
+ va_list alist;
+ int *ok;
+
+ va_start(alist, arg);
+ switch(event_no) {
+ case SMTP_EV_CONNECT:
+ case SMTP_EV_MAILSTATUS:
+ case SMTP_EV_RCPTSTATUS:
+ case SMTP_EV_MESSAGEDATA:
+ case SMTP_EV_MESSAGESENT:
+ case SMTP_EV_DISCONNECT: break;
+ case SMTP_EV_WEAK_CIPHER: {
+ int bits;
+ bits = va_arg(alist, long); ok = va_arg(alist, int*);
+ mutt_message (_("SMTP_EV_WEAK_CIPHER, bits=%d - accepted."), bits);
+ sleep(1);
+ *ok = 1; break;
+ }
+ case SMTP_EV_STARTTLS_OK:
+ mutt_message (_("Using TLS"));
+ sleep(1);
+ break;
+ case SMTP_EV_INVALID_PEER_CERTIFICATE: {
+ long vfy_result;
+ vfy_result = va_arg(alist, long); ok = va_arg(alist, int*);
+ mutt_error (_("Error verifying certificate. Error Code: %lu"), vfy_result);
+ sleep(2);
+ *ok = 1;
+ break;
+ }
+ case SMTP_EV_NO_PEER_CERTIFICATE: {
+ ok = va_arg(alist, int*);
+ mutt_message (_("SMTP_EV_NO_PEER_CERTIFICATE - accepted."));
+ sleep(1);
+ *ok = 1; break;
+ }
+ case SMTP_EV_WRONG_PEER_CERTIFICATE: {
+ ok = va_arg(alist, int*);
+ mutt_message (_("SMTP_EV_WRONG_PEER_CERTIFICATE - accepted."));
+ sleep(1);
+ *ok = 1; break;
+ }
+ case SMTP_EV_NO_CLIENT_CERTIFICATE: {
+ ok = va_arg(alist, int*);
+ mutt_message (_("SMTP_EV_NO_CLIENT_CERTIFICATE - accepted."));
+ sleep(1);
+ *ok = 1; break;
+ }
+ case SMTP_EV_EXTNA_DSN:
+ extna ("DSN");
+ break;
+ case SMTP_EV_EXTNA_STARTTLS:
+ extna ("StartTLS");
+ break;
+ case SMTP_EV_EXTNA_8BITMIME:
+ extna ("8BITMIME");
+ break;
+ default:
+ mutt_message(_("Got unhandled event ID = %d - ignored."), event_no);
+ sleep(1);
+ }
+ va_end(alist);
+}
+
+static void do_dsn_notify (smtp_message_t message, const char* from) {
+ int flags = Notify_NOTSET;
+ smtp_recipient_t self = NULL;
+
+ if (m_strisempty(MTransport.dsn_notify) || !message || m_strisempty(from) ||
+ strstr (MTransport.dsn_notify, "never") != NULL)
+ return;
+
+ if (strstr (MTransport.dsn_notify, "failure") != NULL)
+ flags |= Notify_FAILURE;
+ if (strstr (MTransport.dsn_notify, "delay") != NULL)
+ flags |= Notify_DELAY;
+ if (strstr (MTransport.dsn_notify, "success") != NULL)
+ flags |= Notify_SUCCESS;
+
+ if (flags != Notify_NOTSET) {
+ if (!(self = smtp_add_recipient (message, from)))
+ return;
+ smtp_dsn_set_notify (self, flags);
+ }
+}
+
+static void do_dsn_ret (smtp_message_t message) {
+ if (m_strisempty(MTransport.dsn_return) || !message)
+ return;
+ if (ascii_strncasecmp (MTransport.dsn_return, "hdrs", 4) == 0)
+ smtp_dsn_set_ret (message, Ret_HDRS);
+ else if (ascii_strncasecmp (MTransport.dsn_return, "full", 4) == 0)
+ smtp_dsn_set_ret (message, Ret_FULL);
+}
+
+int send_smtp_check_usetls (const char* option, unsigned long p,
+ char* errbuf, ssize_t errlen) {
+ char* val = (char*) p;
+ if (m_strisempty(val))
+ return (1);
+ if (m_strncmp(val, "enabled", 7) != 0 &&
+ m_strncmp(val, "required", 8) != 0) {
+ if (errbuf)
+ snprintf (errbuf, errlen, _("'%s' is invalid for %s"), val, option);
+ return (0);
+ }
+ return (1);
+}
+
+/*
+ * send_smtp_invoke
+ * Sends a mail message to the provided recipients using libesmtp.
+ * Returns 0 upon success, -1 upon failure (and prints an error
+ * message).
+ */
+static int
+send_smtp_invoke(address_t *from, address_t *to, address_t *cc,
+ address_t *bcc, const char *msg, int eightbit)
+{
+ int ret = 0;
+ smtp_session_t session;
+ smtp_message_t message;
+ char *hostportstr = NULL;
+ size_t hostportlen;
+ FILE *fp = NULL;
+ auth_context_t authctx = NULL;
+ const smtp_status_t *status;
+ char* envfrom = from->mailbox;
+
+ _send_smtp_ensure_init ();
+
+ if ((session = smtp_create_session ()) == NULL)
+ SMTPFAIL ("smtp_create_session");
+
+#ifdef HAVE_GNUTLS_OPENSSL_H
+ if (!ascii_strncasecmp("enabled", SmtpUseTLS, 7)) {
+ smtp_starttls_enable(session, Starttls_ENABLED);
+ } else if (!ascii_strncasecmp("required", SmtpUseTLS, 8)) {
+ smtp_starttls_enable(session, Starttls_REQUIRED);
+ }