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bb6ae3fb | 1 | /* |
2 | * This file is part of DisOrder | |
5aff007d | 3 | * Copyright (C) 2007-2008 Richard Kettlewell |
bb6ae3fb | 4 | * |
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 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
24 | #include <stdio.h> | |
25 | #include <errno.h> | |
26 | #include <stdarg.h> | |
27 | #include <sys/socket.h> | |
28 | #include <netdb.h> | |
29 | #include <unistd.h> | |
30 | #include <gcrypt.h> | |
ab29cd16 | 31 | #include <time.h> |
edbd470f | 32 | #include <netinet/in.h> |
bb6ae3fb | 33 | |
34 | #include "syscalls.h" | |
35 | #include "log.h" | |
36 | #include "configuration.h" | |
37 | #include "inputline.h" | |
38 | #include "addr.h" | |
39 | #include "hostname.h" | |
40 | #include "sendmail.h" | |
41 | #include "base64.h" | |
42 | ||
43 | /** @brief Get a server response | |
44 | * @param tag Server name | |
45 | * @param in Input stream | |
46 | * @return Response code 0-999 or -1 on error | |
47 | */ | |
48 | static int getresponse(const char *tag, FILE *in) { | |
49 | char *line; | |
50 | ||
51 | while(!inputline(tag, in, &line, CRLF)) { | |
52 | if(line[0] >= '0' && line[0] <= '9' | |
53 | && line[1] >= '0' && line[1] <= '9' | |
54 | && line[2] >= '0' && line[2] <= '9') { | |
55 | const int rc = 10 * (10 * line[0] + line[1]) + line[2] - 111 * '0'; | |
56 | if(rc >= 400 && rc <= 599) | |
57 | error(0, "%s: %s", tag, line); | |
58 | if(line[3] != '-') { | |
59 | return rc; | |
60 | } | |
61 | /* else go round for further response lines */ | |
62 | } else { | |
63 | error(0, "%s: malformed response: %s", tag, line); | |
64 | return -1; | |
65 | } | |
66 | } | |
67 | if(ferror(in)) | |
68 | error(errno, "%s: read error", tag); | |
69 | else | |
70 | error(0, "%s: server closed connection", tag); | |
71 | return -1; | |
72 | } | |
73 | ||
74 | /** @brief Send a command to the server | |
75 | * @param tag Server name | |
76 | * @param out stream to send commands to | |
77 | * @param fmt Format string | |
78 | * @return 0 on success, non-0 on error | |
79 | */ | |
80 | static int sendcommand(const char *tag, FILE *out, const char *fmt, ...) { | |
81 | va_list ap; | |
82 | int rc; | |
83 | ||
84 | va_start(ap, fmt); | |
85 | rc = vfprintf(out, fmt, ap); | |
86 | va_end(ap); | |
87 | if(rc >= 0) | |
88 | rc = fputs("\r\n", out); | |
89 | if(rc >= 0) | |
90 | rc = fflush(out); | |
91 | if(rc >= 0) | |
92 | return 0; | |
93 | error(errno, "%s: write error", tag); | |
94 | return -1; | |
95 | } | |
96 | ||
97 | /** @brief Send a mail message | |
98 | * @param tag Server name | |
99 | * @param in Stream to read responses from | |
100 | * @param out Stream to send commands to | |
101 | * @param sender Sender address (can be "") | |
102 | * @param pubsender Visible sender address (must not be "") | |
103 | * @param recipient Recipient address | |
104 | * @param subject Subject string | |
105 | * @param encoding Body encoding | |
0590cedc | 106 | * @param content_type Content-type of body |
bb6ae3fb | 107 | * @param body Text of body (encoded, but \n for newline) |
108 | * @return 0 on success, non-0 on error | |
109 | */ | |
110 | static int sendmailfp(const char *tag, FILE *in, FILE *out, | |
111 | const char *sender, | |
112 | const char *pubsender, | |
113 | const char *recipient, | |
114 | const char *subject, | |
115 | const char *encoding, | |
116 | const char *content_type, | |
117 | const char *body) { | |
118 | int rc, sol = 1; | |
119 | const char *ptr; | |
120 | uint8_t idbuf[20]; | |
121 | char *id; | |
ab29cd16 | 122 | struct tm ut; |
123 | time_t now; | |
124 | char date[128]; | |
bb6ae3fb | 125 | |
ab29cd16 | 126 | time(&now); |
127 | gmtime_r(&now, &ut); | |
128 | strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S +0000", &ut); | |
bb6ae3fb | 129 | gcry_create_nonce(idbuf, sizeof idbuf); |
130 | id = mime_to_base64(idbuf, sizeof idbuf); | |
131 | if((rc = getresponse(tag, in)) / 100 != 2) | |
132 | return -1; | |
133 | if(sendcommand(tag, out, "HELO %s", local_hostname())) | |
134 | return -1; | |
135 | if((rc = getresponse(tag, in)) / 100 != 2) | |
136 | return -1; | |
137 | if(sendcommand(tag, out, "MAIL FROM:<%s>", sender)) | |
138 | return -1; | |
139 | if((rc = getresponse(tag, in)) / 100 != 2) | |
140 | return -1; | |
141 | if(sendcommand(tag, out, "RCPT TO:<%s>", recipient)) | |
142 | return -1; | |
143 | if((rc = getresponse(tag, in)) / 100 != 2) | |
144 | return -1; | |
145 | if(sendcommand(tag, out, "DATA", sender)) | |
146 | return -1; | |
147 | if((rc = getresponse(tag, in)) / 100 != 3) | |
148 | return -1; | |
149 | if(fprintf(out, "From: %s\r\n", pubsender) < 0 | |
150 | || fprintf(out, "To: %s\r\n", recipient) < 0 | |
151 | || fprintf(out, "Subject: %s\r\n", subject) < 0 | |
152 | || fprintf(out, "Message-ID: <%s@%s>\r\n", id, local_hostname()) < 0 | |
153 | || fprintf(out, "MIME-Version: 1.0\r\n") < 0 | |
154 | || fprintf(out, "Content-Type: %s\r\n", content_type) < 0 | |
155 | || fprintf(out, "Content-Transfer-Encoding: %s\r\n", encoding) < 0 | |
ab29cd16 | 156 | || fprintf(out, "Date: %s\r\n", date) < 0 |
bb6ae3fb | 157 | || fprintf(out, "\r\n") < 0) { |
158 | write_error: | |
159 | error(errno, "%s: write error", tag); | |
160 | return -1; | |
161 | } | |
162 | for(ptr = body; *ptr; ++ptr) { | |
163 | if(sol && *ptr == '.') | |
164 | if(fputc('.', out) < 0) | |
165 | goto write_error; | |
166 | if(*ptr == '\n') { | |
167 | if(fputc('\r', out) < 0) | |
168 | goto write_error; | |
169 | sol = 1; | |
170 | } else | |
171 | sol = 0; | |
172 | if(fputc(*ptr, out) < 0) | |
173 | goto write_error; | |
174 | } | |
175 | if(!sol) | |
176 | if(fputs("\r\n", out) < 0) | |
177 | goto write_error; | |
178 | if(fprintf(out, ".\r\n") < 0 | |
179 | || fflush(out) < 0) | |
180 | goto write_error; | |
181 | if((rc = getresponse(tag, in)) / 100 != 2) | |
182 | return -1; | |
183 | return 0; | |
184 | } | |
185 | ||
186 | /** @brief Send a mail message | |
187 | * @param sender Sender address (can be "") | |
188 | * @param pubsender Visible sender address (must not be "") | |
189 | * @param recipient Recipient address | |
190 | * @param subject Subject string | |
191 | * @param encoding Body encoding | |
192 | * @param content_type Content-type of body | |
193 | * @param body Text of body (encoded, but \n for newline) | |
194 | * @return 0 on success, non-0 on error | |
195 | * | |
196 | * See mime_encode_text() for encoding of text bodies. | |
197 | */ | |
198 | int sendmail(const char *sender, | |
199 | const char *pubsender, | |
200 | const char *recipient, | |
201 | const char *subject, | |
202 | const char *encoding, | |
203 | const char *content_type, | |
204 | const char *body) { | |
205 | struct stringlist a; | |
206 | char *s[2]; | |
207 | struct addrinfo *ai; | |
208 | char *tag; | |
209 | int fdin, fdout, rc; | |
210 | FILE *in, *out; | |
211 | ||
212 | static const struct addrinfo pref = { | |
66613034 RK |
213 | .ai_flags = 0, |
214 | .ai_family = PF_INET, | |
215 | .ai_socktype = SOCK_STREAM, | |
216 | .ai_protocol = IPPROTO_TCP, | |
bb6ae3fb | 217 | }; |
218 | ||
219 | /* Find the SMTP server */ | |
220 | a.n = 2; | |
221 | a.s = s; | |
222 | s[0] = config->smtp_server; | |
223 | s[1] = (char *)"smtp"; | |
224 | if(!(ai = get_address(&a, &pref, &tag))) | |
225 | return -1; | |
226 | fdin = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
227 | if(connect(fdin, ai->ai_addr, ai->ai_addrlen) < 0) { | |
228 | error(errno, "error connecting to %s", tag); | |
229 | xclose(fdin); | |
230 | return -1; | |
231 | } | |
232 | if((fdout = dup(fdin)) < 0) | |
233 | fatal(errno, "error calling dup2"); | |
234 | if(!(in = fdopen(fdin, "rb"))) | |
235 | fatal(errno, "error calling fdopen"); | |
236 | if(!(out = fdopen(fdout, "wb"))) | |
237 | fatal(errno, "error calling fdopen"); | |
238 | rc = sendmailfp(tag, in, out, sender, pubsender, recipient, subject, | |
239 | encoding, content_type, body); | |
240 | fclose(in); | |
241 | fclose(out); | |
242 | return rc; | |
243 | } | |
244 | ||
6207d2f3 | 245 | /** @brief Start a subproces to send a mail message |
246 | * @param sender Sender address (can be "") | |
247 | * @param pubsender Visible sender address (must not be "") | |
248 | * @param recipient Recipient address | |
249 | * @param subject Subject string | |
250 | * @param encoding Body encoding | |
251 | * @param content_type Content-type of body | |
252 | * @param body Text of body (encoded, but \n for newline) | |
253 | * @return Subprocess PID on success, -1 on error | |
254 | */ | |
255 | pid_t sendmail_subprocess(const char *sender, | |
256 | const char *pubsender, | |
257 | const char *recipient, | |
258 | const char *subject, | |
259 | const char *encoding, | |
260 | const char *content_type, | |
261 | const char *body) { | |
262 | pid_t pid; | |
263 | ||
264 | if(!(pid = fork())) { | |
265 | exitfn = _exit; | |
266 | if(sendmail(sender, pubsender, recipient, subject, | |
267 | encoding, content_type, body)) | |
268 | _exit(1); | |
269 | _exit(0); | |
270 | } | |
271 | if(pid < 0) | |
272 | error(errno, "error calling fork"); | |
273 | return pid; | |
274 | } | |
275 | ||
bb6ae3fb | 276 | /* |
277 | Local Variables: | |
278 | c-basic-offset:2 | |
279 | comment-column:40 | |
280 | fill-column:79 | |
281 | indent-tabs-mode:nil | |
282 | End: | |
283 | */ |