inntobbs.c

#include <stdio.h>
#include "innbbsconf.h"
#include "daemon.h"
#include "bbslib.h"
#include <time.h>

#define INNTOBBS
#include "inntobbs.h"
#include "lang.h"

typedef struct Header {
	char *name;
	int id;
} header_t;

/*enum HeaderValue {
SUBJECT_H, FROM_H, DATE_H, MID_H, NEWSGROUPS_H,
NNTPPOSTINGHOST_H, NNTPHOST_H, CONTROL_H, PATH_H,
ORGANIZATION_H, LASTHEADER,
};
*/

/*char *strchr ARG((char*,int));
char *strrchr ARG((char*,int));
char *strstr ARG((char*,char*));
*/

header_t headertable[] = {
	{"Subject", SUBJECT_H},
	{"From", FROM_H},
	{"Date", DATE_H},
	{"Message-ID", MID_H},
	{"Newsgroups", NEWSGROUPS_H},
	{"NNTP-Posting-Host", NNTPPOSTINGHOST_H},
	{"NNTP-Host", NNTPHOST_H},
	{"Control", CONTROL_H},
	{"Path", PATH_H},
	{"Organization", ORGANIZATION_H},
	{"X-Auth-From", X_Auth_From_H},
	{"Approved", APPROVED_H},
	{"Distribution", DISTRIBUTION_H},
	{"Keywords", KEYWORDS_H},
	{"Summary", SUMMARY_H},
	{"References", REFERENCES_H}
};

char *HEADER[LASTHEADER];
char *BODY;
char *FROM, *SUBJECT, *SITE, *DATE, *POSTHOST,
    *NNTPHOST, *PATH, *GROUPS, *MSGID, *CONTROL;

extern nodelist_t *search_nodelist_bynode(char *node);
extern int isfile(char *file);
extern char *fileglue(char *fmt, ...);
extern void bbslog(char *fmt, ...);

int headervalue(char *); 
void article_init();

int
isexcluded(path1, nl)
char *path1;
nodelist_t *nl;
{
	char path2[1024];
	/*path2 = (char*)mymalloc(strlen(nl->node) + 3); */
	sprintf(path2, "!%.*s!", sizeof path2 - 3, nl->node);
	if (strstr(path1, path2) != NULL)
		return 1;
	if (nl->exclusion && *nl->exclusion) {
		char *exclude, *ptr;
		for (exclude = nl->exclusion, ptr = strchr(exclude, ',');
		     exclude && *exclude; ptr = strchr(exclude, ',')) {
			if (ptr)
				*ptr = '\0';
			sprintf(path2, "!%.*s!", sizeof path2 - 3, exclude);
			if (strstr(path1, path2) != NULL)
				return 1;
			if (ptr) {
				*ptr = ',';
				exclude = ptr + 1;
			} else {
				break;
			}
		}
	}
	return 0;
}

void
feedfplog(nf, filepath, type)
newsfeeds_t *nf;
char *filepath;
int type;
{
	char *path1;
	nodelist_t *nl;
	if (nf == NULL)
		return;
	if (nf->path != NULL) {
		char *ptr1, *ptr2;
		char savech;
		path1 = (char *) mymalloc(strlen(HEADER[PATH_H]) + 3);
		sprintf(path1, "!%s!", HEADER[PATH_H]);
		for (ptr1 = nf->path; ptr1 && *ptr1;) {
			for (; *ptr1 && isspace(*ptr1); ptr1++) ;
			if (!*ptr1)
				break;
			for (ptr2 = ptr1; *ptr2 && !isspace(*ptr2); ptr2++) ;
			savech = *ptr2;
			*ptr2 = '\0';
			/*
			   bbslog("search node %s\n",ptr1);
			 */
			nl = (nodelist_t *) search_nodelist_bynode(ptr1);
			/*
			   bbslog("search node node %s, host %s fp %d\n",nl->node, nl->host, nl->feedfp);
			 */
			*ptr2 = savech;
			ptr1 = ptr2++;
			if (nl == NULL)
				continue;
			if (nl->feedfp == NULL)
				continue;
			if (isexcluded(path1, nl))
				continue;
			/*path2 = (char*)mymalloc(strlen(nl->node) + 3);
			   sprintf(path2, "!%s!",nl->node);
			   free(path2);
			 */
			/*
			   bbslog("path1 %s path2 %s\n",path1, path2);
			 */
			/*if (strstr(path1, path2) != NULL) return; */
			/* to conform to the bntplink batch file */
			{
				char *slash = strrchr(filepath, '/');
				if (slash != NULL)
					*slash = '\t';
				fprintf(nl->feedfp,
					"%s\t%s\t\t%s\t%s\t%c\t%s\t%s!%s\n",
					filepath == NULL ? "" : filepath,
					GROUPS, FROM, SUBJECT, type, MSGID,
					MYBBSID, HEADER[PATH_H]);
				if (slash != NULL)
					*slash = '/';
			}
			fflush(nl->feedfp);
			if (savech == '\0')
				break;
		}
		free(path1);
	}
}

static FILE *bbsfeedsfp = NULL;
static int bbsfeedson = -1;

void 
init_bbsfeedsfp()
{
	if (bbsfeedsfp != NULL) {
		fclose(bbsfeedsfp);
		bbsfeedsfp = NULL;
	}
	bbsfeedson = -1;
}

void
bbsfeedslog(filepath, type)
char *filepath;
int type;
{

	char datebuf[40];
	time_t now;

	if (bbsfeedson == 0)
		return;
	if (bbsfeedson == -1) {
		if (!isfile(BBSFEEDS)) {
			bbsfeedson = 0;
			return;
		}
		bbsfeedson = 1;
	}

	if (bbsfeedsfp == NULL) {
		bbsfeedsfp = fopen(BBSFEEDS, "a");
	}
	time(&now);
	strftime(datebuf, sizeof (datebuf), "%b %d %X ", localtime(&now));

	if (bbsfeedsfp != NULL) {
		fprintf(bbsfeedsfp, "%s %c %s %s %s %s!%s %s\n", datebuf, type,
			REMOTEHOSTNAME, GROUPS, MSGID, MYBBSID, HEADER[PATH_H],
			filepath == NULL ? "" : filepath);
		fflush(bbsfeedsfp);
	}
}

static FILE *echomailfp = NULL;
static int echomaillogon = -1;

void
init_echomailfp()
{
	if (echomailfp != NULL) {
		fclose(echomailfp);
		echomailfp = NULL;
	}
	echomaillogon = -1;
}

void
echomaillog()
{

	if (echomaillogon == 0)
		return;
	if (echomaillogon == -1) {
		if (!isfile(ECHOMAIL)) {
			echomaillogon = 0;
			return;
		}
		echomaillogon = 1;
	}

	if (echomailfp == NULL) {
		echomailfp = fopen(ECHOMAIL, "a");
	}

	if (echomailfp != NULL) {
		fprintf(echomailfp, "\n");
		fprintf(echomailfp, "%s%s, %s%s\n", FromTxt, FROM, BoardTxt,
			GROUPS);
		fprintf(echomailfp, "%s%s\n", SubjectTxt, SUBJECT);
		fprintf(echomailfp, "%s%s (%s)\n", OrganizationTxt, SITE, DATE);
		fprintf(echomailfp, "%s%s (%s)\n", PathTxt, PATH,
			REMOTEHOSTNAME);
		fflush(echomailfp);
	}
}

#ifdef FILTER

char *
cmdfilter(indata, filterbuffer, cmd)
char *indata, **filterbuffer;
FuncPtr cmd;
{
	int len = strlen(indata);
	if (*filterbuffer != NULL)
		*filterbuffer = (char *) myrealloc(*filterbuffer, len + 4096);
	else
		*filterbuffer = (char *) mymalloc(len + 4096);
	if (filterbuffer == NULL)
		return NULL;
	bcopy(indata, *filterbuffer, len);
	(*cmd) (*filterbuffer, &len, 0);
	(*filterbuffer)[len] = '\0';
	return *filterbuffer;
}

char *
externfilter(indata, filterbuffer, cmd)
char *indata, **filterbuffer, *cmd;
{
	FILE *fp;
	int fd;
	char *tmpfile;

	int len = strlen(indata);
	struct stat st;

	fp = (FILE *) popen((char *)
			    fileglue("%s > /tmp/.innbbsdfilter%d%d", cmd,
				     getpid(), getuid()), "w");
	if (fp == NULL) {
		bbslog("Err: can't popen %s\n", cmd);
		return NULL;
	}
	if (fwrite(indata, 1, len, fp) != len) {
		bbslog("Err: fwrite to %s failed, len %d\n", cmd, len);
		return NULL;
	}
	pclose(fp);

	tmpfile =
	    (char *) fileglue("/tmp/.innbbsdfilter%d%d", getpid(), getuid());
	if (stat(tmpfile, &st) != 0)
		return NULL;

	if (*filterbuffer != NULL)
		*filterbuffer = myrealloc(*filterbuffer, st.st_size + 1);
	else
		*filterbuffer = mymalloc(st.st_size + 1);
	(*filterbuffer)[st.st_size] = '\0';
	if (*filterbuffer == NULL)
		return NULL;

	fd = open(tmpfile, O_RDONLY);
	if (fd < 0)
		return NULL;
	read(fd, *filterbuffer, st.st_size);
	close(fd);
	unlink(tmpfile);
	return *filterbuffer;
}

char *
filterdata(arp, direction, indata, filterdata)
newsfeeds_t *arp;
int direction;
char *indata, **filterdata;
{
	char *outdata;
	FuncPtr fptr = NULL;
	char *cmdptr = NULL;
	if (direction) {
		fptr = arp->sfilter;
		cmdptr = arp->scmdfilter;
	} else {
		fptr = arp->rfilter;
		cmdptr = arp->rcmdfilter;
	}
	if (fptr)
		outdata = cmdfilter(indata, filterdata, fptr);
	else if (cmdptr)
		outdata = externfilter(indata, filterdata, cmdptr);
	else
		outdata = NULL;
	return outdata;
}

char *
processfilter(indata, filterbuffer, direction)
char *indata, **filterbuffer;
int direction;
{
	char *front = indata, *ptr, *hptr;
	char *outdata = indata;
	int filterflag = 0;

	for (ptr = (char *) strchr(indata, '\n'); ptr != NULL && *ptr != '\0';
	     front = ptr + 1, ptr = (char *) strchr(front, '\n')) {
		*ptr = '\0';
		if (front[0] == '\r' || front[1] == '\n') {
			*ptr = '\n';
			break;
		}
		hptr = (char *) strchr(front, ':');
		if (hptr != NULL && hptr[1] == ' ') {
			*hptr = '\0';
			if (strcmp(front, "Newsgroups") == 0) {
				char *ngp, *ongp;
				newsfeeds_t *arp;
				char *tp;
				if ((tp = (char *) strchr(hptr + 2, '\r')) !=
				    NULL) *tp = '\0';
				for (ngp = hptr + 2, ongp = strchr(ngp, ',');
				     ngp && *ngp; ongp = strchr(ngp, ',')) {
					if (ongp)
						*ongp = '\0';
					arp = search_group(ngp);
					if (arp) {
						if (ongp)
							*ongp = ',';
						if (tp != NULL)
							*tp = '\r';
						if (hptr)
							*hptr = ':';
						if (ptr)
							*ptr = '\n';
						outdata =
						    filterdata(arp, direction,
							       indata,
							       filterbuffer);
						if (outdata)
							filterflag = 1;
						if (ongp)
							*ongp = '\0';
						if (tp != NULL)
							tp = '\0';
						if (hptr)
							*hptr = '\0';
						if (ptr)
							*ptr = '\0';
					}
					if (ongp) {
						*ongp = ',';
						ngp = ongp + 1;
					} else {
						break;
					}
					if (filterflag)
						break;
				}
				if (tp != NULL)
					*tp = '\r';
				filterflag = 1;
			}
			*hptr = ':';
		}
		*ptr = '\n';
		if (filterflag)
			break;
	}
	if (outdata)
		return outdata;
	else
		return indata;
}
#endif

int
headercmp(a, b)
header_t *a, *b;
{
	return strcasecmp(a->name, b->name);
}

int
readlines(client)
ClientType *client;
{
	buffer_t *in = &client->in;
	char *indata = in->data;
	char *front = in->data, *ptr, *hptr;
	int i;

	for (i = 0; i < LASTHEADER; i++)
		HEADER[i] = NULL;

#ifdef FILTER
	indata = processfilter(in->data, &client->filter_buffer, 0);
#endif

	if (indata != NULL) {
		front = indata;
	} else {
		front = indata = in->data;
	}

	for (ptr = (char *) strchr(indata, '\n'); ptr != NULL && *ptr != '\0';
	     front = ptr + 1, ptr = (char *) strchr(front, '\n')) {
		*ptr = '\0';
		if (front[0] == '\r' || front[1] == '\n') {
			BODY = front + 2;
			break;
		}
		hptr = (char *) strchr(front, ':');
		if (hptr != NULL && hptr[1] == ' ') {
			int value;
			*hptr = '\0';
			value = headervalue(front);
			if (value != -1) {
				char *tp;
				HEADER[value] = hptr + 2;
				if ((tp = (char *) strchr(HEADER[value], '\r'))
				    != NULL)
					*tp = '\0';
			}
			*hptr = ':';
		}
	/**ptr = '\n';*/
	}
	NNTPHOST = HEADER[NNTPHOST_H];
	PATH = HEADER[PATH_H];
	FROM = HEADER[FROM_H];
	GROUPS = HEADER[NEWSGROUPS_H];
	SUBJECT = HEADER[SUBJECT_H];
	DATE = HEADER[DATE_H];
	SITE = HEADER[ORGANIZATION_H];
	MSGID = HEADER[MID_H];
	CONTROL = HEADER[CONTROL_H];
	POSTHOST = HEADER[NNTPPOSTINGHOST_H];
	if (POSTHOST == NULL) {
		if (HEADER[X_Auth_From_H] != NULL) {
			POSTHOST = HEADER[X_Auth_From_H];
			HEADER[NNTPPOSTINGHOST_H] = POSTHOST;
		}
	}
	return 0;
}

int
headervalue(inputheader)
char *inputheader;
{
	header_t key, *findkey;
	static int hasinit = 0;

	if (hasinit == 0) {
		article_init();
		hasinit = 1;
	}

	key.name = inputheader;
	findkey = (header_t *) bsearch(
				       (char *) &key, (char *) headertable,
				       sizeof (headertable) / sizeof (header_t),
				       sizeof (key), headercmp);
	if (findkey != NULL)
		return findkey->id;
	return -1;
}

void
article_init()
{
	int i;
	static int article_inited = 0;

	if (article_inited)
		return;
	article_inited = 1;

	qsort(headertable, sizeof (headertable) / sizeof (header_t),
	      sizeof (header_t), headercmp);
	for (i = 0; i < LASTHEADER; i++)
		HEADER[i] = NULL;
}

#ifdef INNTOBBS_MAIN
main()
{
	int i, j, k, l, m, n, o, p, q;
	article_init();
	i = headervalue("Subject");
	j = headervalue("From");
	k = headervalue("Date");
	l = headervalue("NNTP-Posting-Host");
	m = headervalue("Newsgroups");
	n = headervalue("Message-ID");
}
#endif