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1.1 root 1: /* mime.c */
2:
3: /* Synchronet MIME functions */
4:
5: /* $Id: mime.c,v 1.7 2003/06/14 10:13:27 rswindell Exp $ */
6:
7: /****************************************************************************
8: * @format.tab-size 4 (Plain Text/Source Code File Header) *
9: * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) *
10: * *
11: * Copyright 2003 Rob Swindell - http://www.synchro.net/copyright.html *
12: * *
13: * This program is free software; you can redistribute it and/or *
14: * modify it under the terms of the GNU General Public License *
15: * as published by the Free Software Foundation; either version 2 *
16: * of the License, or (at your option) any later version. *
17: * See the GNU General Public License for more details: gpl.txt or *
18: * http://www.fsf.org/copyleft/gpl.html *
19: * *
20: * Anonymous FTP access to the most recent released source is available at *
21: * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net *
22: * *
23: * Anonymous CVS access to the development source and modification history *
24: * is available at cvs.synchro.net:/cvsroot/sbbs, example: *
25: * cvs -d :pserver:[email protected]:/cvsroot/sbbs login *
26: * (just hit return, no password is necessary) *
27: * cvs -d :pserver:[email protected]:/cvsroot/sbbs checkout src *
28: * *
29: * For Synchronet coding style and modification guidelines, see *
30: * http://www.synchro.net/source.html *
31: * *
32: * You are encouraged to submit any modifications (preferably in Unix diff *
33: * format) via e-mail to [email protected] *
34: * *
35: * Note: If this box doesn't appear square, then you need to fix your tabs. *
36: ****************************************************************************/
37:
38: /* See RFCs 1521,2045,2046,2047,2048,2049,1590 */
39:
40: #include <stdlib.h>
41: #include <stdio.h>
42: #include <time.h>
43:
44: #include "sbbs.h"
45: #include "mailsrvr.h"
46: #include "base64.h"
47:
48: #define SIZEOF_MIMEBOUNDARY 36
49:
50: char* mimegetboundary()
51: {
52: int i, num;
53: char* boundaryString = (char*)malloc(SIZEOF_MIMEBOUNDARY + 1);
54:
55: srand(time(NULL));
56: if (boundaryString == NULL)
57: return NULL;
58: for (i=0;i<SIZEOF_MIMEBOUNDARY;i++) {
59: num=(rand()%62);
60: if(num<10)
61: num+=48;
62: else if(num>=10 && num<36)
63: num+=55;
64: else
65: num+=61;
66: boundaryString[i]=(char)num;
67: }
68: boundaryString[i]='\0';
69: return boundaryString;
70: }
71:
72: void mimeheaders(SOCKET socket, char* boundary)
73: {
74: sockprintf(socket,"MIME-Version: 1.0");
75: sockprintf(socket,"Content-Type: multipart/mixed;");
76: sockprintf(socket," boundary=\"%s\"",boundary);
77: }
78:
79: void mimeblurb(SOCKET socket, char* boundary)
80: {
81: sockprintf(socket,"This is a multi-part message in MIME format.");
82: sockprintf(socket,"");
83: }
84:
85: void mimetextpartheader(SOCKET socket, char* boundary)
86: {
87: sockprintf(socket,"--%s",boundary);
88: sockprintf(socket,"Content-Type: text/plain;");
89: sockprintf(socket," charset=\"iso-8859-1\"");
90: sockprintf(socket,"Content-Transfer-Encoding: 7bit");
91: }
92:
93: BOOL base64out(SOCKET socket, char* pathfile)
94: {
95: FILE * fp;
96: char in[57];
97: char out[77];
98: int bytesread;
99:
100: if((fp=fopen(pathfile,"rb"))==NULL)
101: return(FALSE);
102: while(1) {
103: bytesread=fread(in,1,sizeof(in),fp);
104: if((b64_encode(out,sizeof(out),in,bytesread)==-1)
105: || !sockprintf(socket,out)) {
106: fclose(fp);
107: return(FALSE);
108: }
109: if(bytesread!=sizeof(in) || feof(fp))
110: break;
111: }
112: fclose(fp);
113: sockprintf(socket,"");
114: return(TRUE);
115: }
116:
117: BOOL mimeattach(SOCKET socket, char* boundary, char* pathfile)
118: {
119: char* fname = getfname(pathfile);
120:
121: sockprintf(socket,"--%s",boundary);
122: sockprintf(socket,"Content-Type: application/octet-stream;");
123: sockprintf(socket," name=\"%s\"",fname);
124: sockprintf(socket,"Content-Transfer-Encoding: base64");
125: sockprintf(socket,"Content-Disposition: attachment;");
126: sockprintf(socket," filename=\"%s\"",fname);
127: sockprintf(socket,"");
128: if(!base64out(socket,pathfile))
129: return(FALSE);
130: sockprintf(socket,"");
131: return(TRUE);
132: }
133:
134: void endmime(SOCKET socket, char* boundary)
135: {
136: /* last boundary */
137: sockprintf(socket,"--%s--",boundary);
138: sockprintf(socket,"");
139: }
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