2 * This file is part of DisOrder
3 * Copyright (C) 2007-2008 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/socket.h>
28 #include <netinet/in.h>
32 #include "configuration.h"
33 #include "inputline.h"
40 /** @brief Get a server response
41 * @param tag Server name
42 * @param in Input stream
43 * @return Response code 0-999 or -1 on error
45 static int getresponse(const char *tag
, FILE *in
) {
48 while(!inputline(tag
, in
, &line
, CRLF
)) {
49 if(line
[0] >= '0' && line
[0] <= '9'
50 && line
[1] >= '0' && line
[1] <= '9'
51 && line
[2] >= '0' && line
[2] <= '9') {
52 const int rc
= 10 * (10 * line
[0] + line
[1]) + line
[2] - 111 * '0';
53 if(rc
>= 400 && rc
<= 599)
54 error(0, "%s: %s", tag
, line
);
58 /* else go round for further response lines */
60 error(0, "%s: malformed response: %s", tag
, line
);
65 error(errno
, "%s: read error", tag
);
67 error(0, "%s: server closed connection", tag
);
71 /** @brief Send a command to the server
72 * @param tag Server name
73 * @param out stream to send commands to
74 * @param fmt Format string
75 * @return 0 on success, non-0 on error
77 static int sendcommand(const char *tag
, FILE *out
, const char *fmt
, ...) {
82 rc
= vfprintf(out
, fmt
, ap
);
85 rc
= fputs("\r\n", out
);
90 error(errno
, "%s: write error", tag
);
94 /** @brief Send a mail message
95 * @param tag Server name
96 * @param in Stream to read responses from
97 * @param out Stream to send commands to
98 * @param sender Sender address (can be "")
99 * @param pubsender Visible sender address (must not be "")
100 * @param recipient Recipient address
101 * @param subject Subject string
102 * @param encoding Body encoding
103 * @param content_type Content-type of body
104 * @param body Text of body (encoded, but \n for newline)
105 * @return 0 on success, non-0 on error
107 static int sendmailfp(const char *tag
, FILE *in
, FILE *out
,
109 const char *pubsender
,
110 const char *recipient
,
112 const char *encoding
,
113 const char *content_type
,
125 strftime(date
, sizeof date
, "%a, %d %b %Y %H:%M:%S +0000", &ut
);
126 gcry_create_nonce(idbuf
, sizeof idbuf
);
127 id
= mime_to_base64(idbuf
, sizeof idbuf
);
128 if((rc
= getresponse(tag
, in
)) / 100 != 2)
130 if(sendcommand(tag
, out
, "HELO %s", local_hostname()))
132 if((rc
= getresponse(tag
, in
)) / 100 != 2)
134 if(sendcommand(tag
, out
, "MAIL FROM:<%s>", sender
))
136 if((rc
= getresponse(tag
, in
)) / 100 != 2)
138 if(sendcommand(tag
, out
, "RCPT TO:<%s>", recipient
))
140 if((rc
= getresponse(tag
, in
)) / 100 != 2)
142 if(sendcommand(tag
, out
, "DATA", sender
))
144 if((rc
= getresponse(tag
, in
)) / 100 != 3)
146 if(fprintf(out
, "From: %s\r\n", pubsender
) < 0
147 || fprintf(out
, "To: %s\r\n", recipient
) < 0
148 || fprintf(out
, "Subject: %s\r\n", subject
) < 0
149 || fprintf(out
, "Message-ID: <%s@%s>\r\n", id
, local_hostname()) < 0
150 || fprintf(out
, "MIME-Version: 1.0\r\n") < 0
151 || fprintf(out
, "Content-Type: %s\r\n", content_type
) < 0
152 || fprintf(out
, "Content-Transfer-Encoding: %s\r\n", encoding
) < 0
153 || fprintf(out
, "Date: %s\r\n", date
) < 0
154 || fprintf(out
, "\r\n") < 0) {
156 error(errno
, "%s: write error", tag
);
159 for(ptr
= body
; *ptr
; ++ptr
) {
160 if(sol
&& *ptr
== '.')
161 if(fputc('.', out
) < 0)
164 if(fputc('\r', out
) < 0)
169 if(fputc(*ptr
, out
) < 0)
173 if(fputs("\r\n", out
) < 0)
175 if(fprintf(out
, ".\r\n") < 0
178 if((rc
= getresponse(tag
, in
)) / 100 != 2)
183 /** @brief Send a mail message
184 * @param sender Sender address (can be "")
185 * @param pubsender Visible sender address (must not be "")
186 * @param recipient Recipient address
187 * @param subject Subject string
188 * @param encoding Body encoding
189 * @param content_type Content-type of body
190 * @param body Text of body (encoded, but \n for newline)
191 * @return 0 on success, non-0 on error
193 * See mime_encode_text() for encoding of text bodies.
195 int sendmail(const char *sender
,
196 const char *pubsender
,
197 const char *recipient
,
199 const char *encoding
,
200 const char *content_type
,
210 static const struct addrinfo pref
= {
212 .ai_family
= PF_INET
,
213 .ai_socktype
= SOCK_STREAM
,
214 .ai_protocol
= IPPROTO_TCP
,
217 /* Find the SMTP server */
218 if(config
->sendmail
&& config
->sendmail
[0]) {
219 int inpipe
[2], outpipe
[2];
221 /* If it's a path name, use -bs mode. Exim, Postfix and Sendmail all claim
222 * to support this. */
223 xpipe(inpipe
); /* sendmail's stdin */
224 xpipe(outpipe
); /* sendmail's stdout */
225 if(!(pid
= xfork())) {
227 signal(SIGPIPE
, SIG_DFL
);
231 xdup2(outpipe
[1], 1);
232 execlp(config
->sendmail
,
233 config
->sendmail
, "-bs", (char *)0);
234 fatal(errno
, "executing %s", config
->sendmail
);
238 fdin
= outpipe
[0]; /* read from sendmail's stdout */
239 fdout
= inpipe
[1]; /* write to sendmail's stdin */
240 tag
= config
->sendmail
;
244 s
[0] = config
->smtp_server
;
245 s
[1] = (char *)"smtp";
246 if(!(ai
= get_address(&a
, &pref
, &tag
)))
248 fdin
= xsocket(ai
->ai_family
, ai
->ai_socktype
, ai
->ai_protocol
);
249 if(connect(fdin
, ai
->ai_addr
, ai
->ai_addrlen
) < 0) {
250 error(errno
, "error connecting to %s", tag
);
254 if((fdout
= dup(fdin
)) < 0)
255 fatal(errno
, "error calling dup2");
257 if(!(in
= fdopen(fdin
, "rb")))
258 fatal(errno
, "error calling fdopen");
259 if(!(out
= fdopen(fdout
, "wb")))
260 fatal(errno
, "error calling fdopen");
261 rc
= sendmailfp(tag
, in
, out
, sender
, pubsender
, recipient
, subject
,
262 encoding
, content_type
, body
);
268 while(waitpid(pid
, &w
, 0) < 0 && errno
== EINTR
)
271 fatal(errno
, "error calling waitpid");
273 info("warning: %s -bs: %s", config
->sendmail
, wstat(w
));
274 /* Not fatal - we determine success/failure from the SMTP conversation.
275 * Some MTAs exit nonzero if you don't QUIT, which is just stupidly
281 /** @brief Start a subproces to send a mail message
282 * @param sender Sender address (can be "")
283 * @param pubsender Visible sender address (must not be "")
284 * @param recipient Recipient address
285 * @param subject Subject string
286 * @param encoding Body encoding
287 * @param content_type Content-type of body
288 * @param body Text of body (encoded, but \n for newline)
289 * @return Subprocess PID on success, -1 on error
291 pid_t
sendmail_subprocess(const char *sender
,
292 const char *pubsender
,
293 const char *recipient
,
295 const char *encoding
,
296 const char *content_type
,
300 if(!(pid
= fork())) {
302 if(sendmail(sender
, pubsender
, recipient
, subject
,
303 encoding
, content_type
, body
))
308 error(errno
, "error calling fork");