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2b2d30fb06
deb-mbse/mbnntp/commands.c
Michiel Broek 789058e28f First draft of chartran functions
2007-02-20 22:11:36 +00:00

625 lines
15 KiB
C
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/*****************************************************************************
*
* $Id$
*
*****************************************************************************
* Copyright (C) 1997-2007
*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*****************************************************************************/
#include "../config.h"
#include "../lib/mbselib.h"
#include "../lib/users.h"
#include "../lib/msg.h"
#include "../lib/msgtext.h"
#include "../lib/mbsedb.h"
#include "ttyio.h"
#include "mbnntp.h"
#include "rfc2ftn.h"
#include "commands.h"
#ifndef USE_NEWSGATE
unsigned int article = 0L; /* Current article */
char currentgroup[81]; /* Current newsgroup */
extern unsigned int sentbytes;
extern unsigned int rcvdbytes;
extern char *ttystat[];
void send_xlat(char *);
#define POST_MAXSIZE 10000
/*
* Safe sending to the client with charset translation.
*/
void send_xlat(char *inp)
{
char temp[1024];
memset(&temp, 0, sizeof(temp));
strncat(temp, chartran(inp), sizeof(temp) -1);
if (strcmp(inp, temp))
Syslog('n', "i \"%s\"", printable(inp, 0));
Syslog('n', "> \"%s\"", printable(temp, 0));
PUTSTR(temp);
PUTSTR((char *)"\r\n");
FLUSHOUT();
sentbytes += (strlen(temp) + 2);
}
/*
* Build a faked RFC msgid, use the CRC32 of the FTN msgid,
* the current group and the configured system's fqdn. This
* gives a unique string specific for the message.
*/
char *make_msgid(char *msgid)
{
static char buf[100];
snprintf(buf, 100, "<%08x$%s@%s>", StringCRC32(msgid), currentgroup, CFG.sysdomain);
return buf;
}
/*
* ARTICLE
* BODY
* HEADER
* STAT
*/
void command_abhs(char *buf)
{
char *p, *cmd, *opt, *subj, *charset = NULL;
unsigned int art = 0L;
int found, charindex;
Syslog('+', "%s", buf);
cmd = strtok(buf, " \0");
opt = strtok(NULL, " \0");
IsDoing("Retrieve");
if (opt == NULL) {
send_nntp("420 No current article has been selected");
return;
}
if (strlen(currentgroup) == 0) {
send_nntp("412 No newsgroup has been selected");
return;
}
if (opt[0] == '<') {
/*
* We have to read all headers in the area to retrieve the message using the msgid.
*/
found = FALSE;
Syslog('n', "Search from %lu to %lu for %s", MsgBase.Lowest, MsgBase.Highest, opt);
for (art = MsgBase.Lowest; art <= MsgBase.Highest; art++) {
if (Msg_ReadHeader(art)) {
if (strcmp(opt, make_msgid(Msg.Msgid)) == 0) {
Syslog('n', "Found message %lu", art);
found = TRUE;
break;
}
}
}
if (! found) {
send_nntp("430 No such article found");
return;
}
} else {
art = atoi(opt);
}
Syslog('n', "Article %lu", art);
if (art == 0L) {
send_nntp("420 No current article has been selected");
return;
}
if (! Msg_ReadHeader(art)) {
send_nntp("430 No such article found");
return;
}
if (strcasecmp(cmd, "STAT") == 0) {
send_nntp("223 %lu %s Article retrieved", art, make_msgid(Msg.Msgid));
return;
}
if (Msg_Read(art, 80)) {
if (strcasecmp(cmd, "ARTICLE") == 0)
send_nntp("220 %ld %s Article retrieved - Head and body follow", art, make_msgid(Msg.Msgid));
if (strcasecmp(cmd, "HEAD") == 0)
send_nntp("221 %ld %s Article retrieved - Head follows", art, make_msgid(Msg.Msgid));
if (strcasecmp(cmd, "BODY") == 0)
send_nntp("222 %ld %s Article retrieved - Body follows", art, make_msgid(Msg.Msgid));
/*
* Find out the charset used in the Fido side of the message
*/
if ((p = (char *)MsgText_First()) != NULL) {
do {
if (strncmp(p, (char *)"\001CHRS: ", 7) == 0) {
charset = xstrcpy(p + 7);
} else if (strncmp(p, "\001CHARSET: ", 10) == 0) {
charset = xstrcpy(p + 10);
}
} while ((p = (char *)MsgText_Next()) != NULL);
}
Syslog('n', "1 charset=\"%s\"", printable(charset, 0));
if (charset == NULL) {
if (msgs.Charset != FTNC_NONE) {
charset = xstrcpy(getftnchrs(msgs.Charset));
} else if (usercharset != FTNC_NONE) {
charset = xstrcpy(getftnchrs(msgs.Charset));
} else {
charset = xstrcpy((char *)"CP437");
}
}
Syslog('n', "2 charset=\"%s\"", printable(charset, 0));
charindex = find_ftn_charset(charset);
if (charindex != FTNC_ERROR) {
chartran_init(charmap[charindex].ic_ftn, (char *)"UTF-8");
}
if ((strcasecmp(cmd, "ARTICLE") == 0) || (strcasecmp(cmd, "HEAD") == 0)) {
send_nntp("Path: MBNNTP!not-for-mail");
send_nntp("From: %s <%s>", Msg.From, Msg.FromAddress);
send_nntp("Newsgroups: %s", currentgroup);
asprintf(&subj,"Subject: %s", Msg.Subject);
send_xlat(subj);
free(subj);
send_nntp("Date: %s", rfcdate(Msg.Written + (gmt_offset((time_t)0) * 60)));
send_nntp("Message-ID: %s", make_msgid(Msg.Msgid));
if (strlen(Msg.Replyid))
send_nntp("References: %s", make_msgid(Msg.Replyid));
/*
* Send RFC 2045 Multipurpose Internet Mail Extensions (MIME) header.
* Order is: 1. Charset defined in the FTN message
* 2. Charset of the message area
* 3. Charset of the user
* 4. Default us-ascii.
*/
send_nntp("MIME-Version: 1.0");
send_nntp("Content-Type: text/plain; charset=utf-8");
send_nntp("X-FTN-From: %s <%s>", Msg.From, Msg.FromAddress);
if (strlen(Msg.To))
send_nntp("X-FTN-To: %s", Msg.To);
if ((p = (char *)MsgText_First()) != NULL) {
do {
if ((p[0] == '\001') || (!strncmp(p, "SEEN-BY:", 8)) || (!strncmp(p, "AREA:", 5))) {
if (p[0] == '\001') {
send_nntp("X-FTN-%s", p+1);
} else {
send_nntp("X-FTN-%s", p);
}
}
} while ((p = (char *)MsgText_Next()) != NULL);
}
}
if (charset)
free(charset);
charset = NULL;
if (strcasecmp(cmd, "ARTICLE") == 0)
send_nntp("");
if ((strcasecmp(cmd, "ARTICLE") == 0) || (strcasecmp(cmd, "BODY") == 0)) {
if ((p = (char *)MsgText_First()) != NULL) {
do {
if ((p[0] == '\001') || (!strncmp(p, "SEEN-BY:", 8)) || (!strncmp(p, "AREA:", 5))) {
/*
* Kludges, suppress
*/
} else {
if (strcmp(p, ".") == 0) /* Don't send a single dot */
send_nntp("..");
else
send_xlat(p);
}
} while ((p = (char *)MsgText_Next()) != NULL);
}
}
send_nntp(".");
chartran_close();
return;
} else {
send_nntp("503 Could not retrieve message");
return;
}
}
/*
* GROUP ggg
*/
void command_group(char *cmd)
{
FILE *fp;
char *temp, *opt;
IsDoing("Group");
Syslog('+', "%s", cmd);
opt = strtok(cmd, " \0");
opt = strtok(NULL, " \0");
if (opt == NULL) {
send_nntp("411 No such news group");
return;
}
temp = calloc(PATH_MAX, sizeof(char));
snprintf(temp, PATH_MAX, "%s/etc/mareas.data", getenv("MBSE_ROOT"));
if ((fp = fopen(temp, "r"))) {
fread(&msgshdr, sizeof(msgshdr), 1, fp);
while (fread(&msgs, msgshdr.recsize, 1, fp) == 1) {
/*
* Only echomail areas with a valid newsgroup name to which the user has access.
*/
if (msgs.Active && (msgs.Type == ECHOMAIL) && strlen(msgs.Newsgroup) &&
(strcasecmp(opt, msgs.Newsgroup) == 0) && Access(usrconfig.Security, msgs.RDSec)) {
if (Msg_Open(msgs.Base)) {
Msg_Number();
Msg_Highest();
Msg_Lowest();
send_nntp("211 %lu %lu %lu %s", MsgBase.Total, MsgBase.Lowest, MsgBase.Highest, msgs.Newsgroup);
snprintf(currentgroup, 81, "%s", msgs.Newsgroup);
} else {
send_nntp("411 No such news group");
}
fclose(fp);
free(temp);
return;
}
fseek(fp, msgshdr.syssize, SEEK_CUR);
}
fclose(fp);
} else {
WriteError("$Can't open %s", temp);
}
free(temp);
send_nntp("411 No such news group");
}
/*
* LIST
* LIST ACTIVE
* LIST NEWSGROUPS
* LIST OVERVIEW.FMT
*/
void command_list(char *cmd)
{
FILE *fp;
char *temp, *opt;
int rw;
IsDoing("List");
Syslog('+', "%s", cmd);
opt = strtok(cmd, " \0");
opt = strtok(NULL, " \0");
if ((opt == NULL) || (strcasecmp(opt, "ACTIVE") == 0) || (strcasecmp(opt, "NEWSGROUPS") == 0)) {
send_nntp("215 Information follows");
temp = calloc(PATH_MAX, sizeof(char));
snprintf(temp, PATH_MAX, "%s/etc/mareas.data", getenv("MBSE_ROOT"));
if ((fp = fopen(temp, "r"))) {
fread(&msgshdr, sizeof(msgshdr), 1, fp);
while (fread(&msgs, msgshdr.recsize, 1, fp) == 1) {
/*
* Only list echomail areas. If a user wants news, he should get that from
* a real newsserver to prevent problems.
*/
if (msgs.Active && (msgs.Type == ECHOMAIL) && strlen(msgs.Newsgroup) && Access(usrconfig.Security, msgs.RDSec)) {
if (Access(usrconfig.Security, msgs.WRSec))
rw = 'y';
else
rw = 'n';
if (msgs.MsgKinds == RONLY)
rw = 'n';
if (Msg_Open(msgs.Base)) {
if (opt && (strcasecmp(opt, "NEWSGROUPS") == 0))
send_nntp("%s %s", msgs.Newsgroup, msgs.Name);
else
send_nntp("%s %lu %lu %c", msgs.Newsgroup, Msg_Lowest(), Msg_Highest(), rw);
Msg_Close();
}
}
fseek(fp, msgshdr.syssize, SEEK_CUR);
}
fclose(fp);
} else {
WriteError("$Can't open %s", temp);
}
free(temp);
send_nntp(".");
return;
}
/*
* Standard list, most clients don't need it, but it's adviced to have.
*/
if (opt && (strcasecmp(opt, "OVERVIEW.FMT") == 0)) {
send_nntp("215 Order of fields in overview database");
send_nntp("Subject:");
send_nntp("From:");
send_nntp("Date:");
send_nntp("Message-ID:");
send_nntp("References:");
send_nntp("Bytes:");
send_nntp("Lines:");
send_nntp(".");
return;
}
/*
* No recognized LIST command
*/
send_nntp("503 Function not available");
}
/*
* POST
*/
int get_post(char *buf, int max)
{
int c, len;
len = 0;
memset(buf, 0, sizeof(buf));
while (TRUE) {
c = tty_getc(180);
if (c <= 0) {
if (c == -2) {
/*
* Timeout
*/
send_nntp("400 Service discontinued, timeout");
}
Syslog('+', "Receiver status %s", ttystat[- c]);
return c;
}
if (c != '\n') {
buf[len] = c;
len++;
buf[len] = '\0';
if (c == '\r') {
rcvdbytes += len;
return len;
}
}
if (len >= max) {
WriteError("Input buffer full");
return len;
}
}
return 0; /* Not reached */
}
/*
* POST
*/
void command_post(char *cmd)
{
FILE *fp = NULL;
int i, rc, maxrc, Done = FALSE, nrofgroups;
char buf[1024], *group, *groups[25];
IsDoing("Post");
Syslog('+', "%s", cmd);
if ((fp = tmpfile()) == NULL) {
WriteError("$Can't create tmpfile");
send_nntp("503 Out of memory");
return;
}
send_nntp("340 Send article to be posted. End with <CR-LF>.<CR-LF>");
while (Done == FALSE) {
rc = get_post(buf, sizeof(buf) -1);
/*
* Strip CR/LF
*/
if (buf[strlen(buf)-1] == '\n') {
buf[strlen(buf)-1] = '\0';
rc--;
}
if (buf[strlen(buf)-1] == '\r') {
buf[strlen(buf)-1] = '\0';
rc--;
}
Syslog('n', "%02d \"%s\"", rc, printable(buf, 0));
if (rc < 0) {
WriteError("nntp_get failed, abort");
return;
}
if ((rc == 1) && (buf[0] == '.')) {
Done = TRUE;
} else {
fwrite(&buf, strlen(buf), 1, fp);
fputc('\n', fp);
}
}
/*
* Make a list of newsgroups to post in
*/
rewind(fp);
nrofgroups = 0;
while (fgets(buf, sizeof(buf) -1, fp)) {
if (!strncasecmp(buf, "Newsgroups: ", 12)) {
if (buf[strlen(buf)-1] == '\n')
buf[strlen(buf)-1] = '\0';
if (buf[strlen(buf)-1] == '\r')
buf[strlen(buf)-1] = '\0';
strtok(buf, " \0");
while ((group = strtok(NULL, ",\0"))) {
Syslog('f', "group: \"%s\"", printable(group, 0));
if (SearchMsgsNews(group)) {
Syslog('n', "Add group \"%s\" (%s)", msgs.Newsgroup, msgs.Tag);
groups[nrofgroups] = xstrcpy(group);
nrofgroups++;
} else {
Syslog('+', "Newsgroup \"%s\" doesn't exist", group);
}
}
}
}
if (nrofgroups == 0) {
Syslog('+', "No newsgroups found for POST");
send_nntp("441 Posting failed");
fclose(fp);
return;
}
maxrc = 0;
for (i = 0; i < nrofgroups; i++) {
Syslog('+', "Posting in newsgroup %s", groups[i]);
if (SearchMsgsNews(groups[i])) {
rc = rfc2ftn(fp);
if (rc > maxrc)
maxrc = rc;
}
free(groups[i]);
}
fclose(fp);
if (maxrc)
send_nntp("441 Posting failed");
else
send_nntp("240 Article posted OK");
}
/*
* XOVER
*/
void command_xover(char *cmd)
{
char *opt, *p, msgid[100], reply[100];
unsigned int i, start, end;
int bytecount, linecount;
IsDoing("Xover");
opt = strtok(cmd, " \0");
opt = strtok(NULL, " \0");
if (MsgBase.Open == FALSE) {
send_nntp("411 No news group current selected");
return;
}
if ((opt == NULL) && (article == 0L)) {
send_nntp("420 No article selected");
return;
}
start = MsgBase.Lowest;
end = MsgBase.Highest;
Syslog('n', "Start %ld, end %ld", start, end);
if (opt != NULL) {
if (strchr(opt, '-')) {
/*
* We have a dash, format 12- or 12-16
*/
p = strtok(opt, "-");
start = atoi(p);
p = strtok(NULL, "\0");
if (p != NULL)
end = atoi(p);
} else {
/*
* Must be a single digit
*/
start = end = atoi(opt);
}
}
Syslog('n', "Start %ld, end %ld", start, end);
send_nntp("224 Overview information follows");
for (i = start; i <= end; i++) {
if (Msg_ReadHeader(i)) {
bytecount = linecount = 0;
if (Msg_Read(i, 80)) {
if ((p = (char *)MsgText_First()) != NULL) {
do {
if ((p[0] != '\001') && (strncmp(p, "SEEN-BY:", 8)) && (strncmp(p, "AREA:", 5))) {
/*
* Only count lines and bytes we should send
*/
linecount++;
bytecount += strlen(p);
}
} while ((p = (char *)MsgText_Next()) != NULL);
}
}
snprintf(msgid, 100, "%s", make_msgid(Msg.Msgid));
reply[0] = 0;
if (strlen(Msg.Replyid))
snprintf(reply, 100, "%s", make_msgid(Msg.Replyid));
send_nntp("%lu\t%s\t%s <%s>\t%s\t%s\t%s\t%d\t%d", i, Msg.Subject, Msg.From, Msg.FromAddress,
rfcdate(Msg.Written + (gmt_offset((time_t)0) * 60)), msgid, reply, bytecount, linecount);
}
}
send_nntp(".");
}
#endif
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