+++ /dev/null
-/*
- * $Id$
- *
- * This file contains functions which handle the mapping of Internet addresses
- * to users on the Citadel system.
- */
-
-#ifdef DLL_EXPORT
-#define IN_LIBCIT
-#endif
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <signal.h>
-#include <pwd.h>
-#include <errno.h>
-#include <sys/types.h>
-
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#include <sys/wait.h>
-#include <string.h>
-#include <limits.h>
-#include "citadel.h"
-#include "server.h"
-#include "serv_extensions.h"
-#include "sysdep_decls.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "tools.h"
-#include "msgbase.h"
-#include "internet_addressing.h"
-#include "user_ops.h"
-#include "room_ops.h"
-#include "parsedate.h"
-#include "database.h"
-
-
-#ifndef HAVE_SNPRINTF
-#include "snprintf.h"
-#endif
-
-
-struct trynamebuf {
- char buffer1[SIZ];
- char buffer2[SIZ];
-};
-
-char *inetcfg = NULL;
-struct spamstrings_t *spamstrings = NULL;
-
-
-/*
- * Return nonzero if the supplied name is an alias for this host.
- */
-int CtdlHostAlias(char *fqdn) {
- int config_lines;
- int i;
- char buf[SIZ];
- char host[SIZ], type[SIZ];
-
- if (!strcasecmp(fqdn, config.c_fqdn)) return(hostalias_localhost);
- if (!strcasecmp(fqdn, config.c_nodename)) return(hostalias_localhost);
- if (inetcfg == NULL) return(hostalias_nomatch);
-
- config_lines = num_tokens(inetcfg, '\n');
- for (i=0; i<config_lines; ++i) {
- extract_token(buf, inetcfg, i, '\n');
- extract_token(host, buf, 0, '|');
- extract_token(type, buf, 1, '|');
-
- if ( (!strcasecmp(type, "localhost"))
- && (!strcasecmp(fqdn, host)))
- return(hostalias_localhost);
-
- if ( (!strcasecmp(type, "gatewaydomain"))
- && (!strcasecmp(&fqdn[strlen(fqdn)-strlen(host)], host)))
- return(hostalias_gatewaydomain);
-
- if ( (!strcasecmp(type, "directory"))
- && (!strcasecmp(&fqdn[strlen(fqdn)-strlen(host)], host)))
- return(hostalias_directory);
-
- }
-
- return(hostalias_nomatch);
-}
-
-
-
-
-
-
-
-/*
- * Return 0 if a given string fuzzy-matches a Citadel user account
- *
- * FIXME ... this needs to be updated to handle aliases.
- */
-int fuzzy_match(struct usersupp *us, char *matchstring) {
- int a;
-
- if ( (!strncasecmp(matchstring, "cit", 3))
- && (atol(&matchstring[3]) == us->usernum)) {
- return 0;
- }
-
-
- for (a=0; a<strlen(us->fullname); ++a) {
- if (!strncasecmp(&us->fullname[a],
- matchstring, strlen(matchstring))) {
- return 0;
- }
- }
- return -1;
-}
-
-
-/*
- * Unfold a multi-line field into a single line, removing multi-whitespaces
- */
-void unfold_rfc822_field(char *field) {
- int i;
- int quote = 0;
-
- striplt(field); /* remove leading/trailing whitespace */
-
- /* convert non-space whitespace to spaces, and remove double blanks */
- for (i=0; i<strlen(field); ++i) {
- if (field[i]=='\"') quote = 1 - quote;
- if (!quote) {
- if (isspace(field[i])) field[i] = ' ';
- while (isspace(field[i]) && isspace(field[i+1])) {
- strcpy(&field[i+1], &field[i+2]);
- }
- }
- }
-}
-
-
-
-/*
- * Split an RFC822-style address into userid, host, and full name
- *
- */
-void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
-{
- int a;
-
- strcpy(user, "");
- strcpy(node, config.c_fqdn);
- strcpy(name, "");
-
- /* extract full name - first, it's From minus <userid> */
- strcpy(name, rfc822);
- stripout(name, '<', '>');
-
- /* strip anything to the left of a bang */
- while ((strlen(name) > 0) && (haschar(name, '!') > 0))
- strcpy(name, &name[1]);
-
- /* and anything to the right of a @ or % */
- for (a = 0; a < strlen(name); ++a) {
- if (name[a] == '@')
- name[a] = 0;
- if (name[a] == '%')
- name[a] = 0;
- }
-
- /* but if there are parentheses, that changes the rules... */
- if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
- strcpy(name, rfc822);
- stripallbut(name, '(', ')');
- }
-
- /* but if there are a set of quotes, that supersedes everything */
- if (haschar(rfc822, 34) == 2) {
- strcpy(name, rfc822);
- while ((strlen(name) > 0) && (name[0] != 34)) {
- strcpy(&name[0], &name[1]);
- }
- strcpy(&name[0], &name[1]);
- for (a = 0; a < strlen(name); ++a)
- if (name[a] == 34)
- name[a] = 0;
- }
- /* extract user id */
- strcpy(user, rfc822);
-
- /* first get rid of anything in parens */
- stripout(user, '(', ')');
-
- /* if there's a set of angle brackets, strip it down to that */
- if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
- stripallbut(user, '<', '>');
- }
-
- /* strip anything to the left of a bang */
- while ((strlen(user) > 0) && (haschar(user, '!') > 0))
- strcpy(user, &user[1]);
-
- /* and anything to the right of a @ or % */
- for (a = 0; a < strlen(user); ++a) {
- if (user[a] == '@')
- user[a] = 0;
- if (user[a] == '%')
- user[a] = 0;
- }
-
-
- /* extract node name */
- strcpy(node, rfc822);
-
- /* first get rid of anything in parens */
- stripout(node, '(', ')');
-
- /* if there's a set of angle brackets, strip it down to that */
- if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
- stripallbut(node, '<', '>');
- }
-
- /* If no node specified, tack ours on instead */
- if (
- (haschar(node, '@')==0)
- && (haschar(node, '%')==0)
- && (haschar(node, '!')==0)
- ) {
- strcpy(node, config.c_nodename);
- }
-
- else {
-
- /* strip anything to the left of a @ */
- while ((strlen(node) > 0) && (haschar(node, '@') > 0))
- strcpy(node, &node[1]);
-
- /* strip anything to the left of a % */
- while ((strlen(node) > 0) && (haschar(node, '%') > 0))
- strcpy(node, &node[1]);
-
- /* reduce multiple system bang paths to node!user */
- while ((strlen(node) > 0) && (haschar(node, '!') > 1))
- strcpy(node, &node[1]);
-
- /* now get rid of the user portion of a node!user string */
- for (a = 0; a < strlen(node); ++a)
- if (node[a] == '!')
- node[a] = 0;
- }
-
- /* strip leading and trailing spaces in all strings */
- striplt(user);
- striplt(node);
- striplt(name);
-}
-
-
-
-/*
- * convert_field() is a helper function for convert_internet_message().
- * Given start/end positions for an rfc822 field, it converts it to a Citadel
- * field if it wants to, and unfolds it if necessary.
- *
- * Returns 1 if the field was converted and inserted into the Citadel message
- * structure, implying that the source field should be removed from the
- * message text.
- */
-int convert_field(struct CtdlMessage *msg, int beg, int end) {
- char *rfc822;
- char *key, *value;
- int i;
- int colonpos = (-1);
- int processed = 0;
- char buf[SIZ];
- char user[1024];
- char node[1024];
- char name[1024];
- char addr[1024];
- time_t parsed_date;
-
- rfc822 = msg->cm_fields['M']; /* M field contains rfc822 text */
- for (i = end; i >= beg; --i) {
- if (rfc822[i] == ':') colonpos = i;
- }
-
- if (colonpos < 0) return(0); /* no colon? not a valid header line */
-
- key = mallok((end - beg) + 2);
- safestrncpy(key, &rfc822[beg], (end-beg)+1);
- key[colonpos - beg] = 0;
- value = &key[(colonpos - beg) + 1];
- unfold_rfc822_field(value);
-
- /*
- * Here's the big rfc822-to-citadel loop.
- */
-
- /* Date/time is converted into a unix timestamp. If the conversion
- * fails, we replace it with the time the message arrived locally.
- */
- if (!strcasecmp(key, "Date")) {
- parsed_date = parsedate(value);
- if (parsed_date < 0L) parsed_date = time(NULL);
- snprintf(buf, sizeof buf, "%ld", (long)parsed_date );
- if (msg->cm_fields['T'] == NULL)
- msg->cm_fields['T'] = strdoop(buf);
- processed = 1;
- }
-
- else if (!strcasecmp(key, "From")) {
- process_rfc822_addr(value, user, node, name);
- lprintf(9, "Converted to <%s@%s> (%s)\n", user, node, name);
- snprintf(addr, sizeof addr, "%s@%s", user, node);
- if (msg->cm_fields['A'] == NULL)
- msg->cm_fields['A'] = strdoop(name);
- processed = 1;
- if (msg->cm_fields['F'] == NULL)
- msg->cm_fields['F'] = strdoop(addr);
- processed = 1;
- }
-
- else if (!strcasecmp(key, "Subject")) {
- if (msg->cm_fields['U'] == NULL)
- msg->cm_fields['U'] = strdoop(value);
- processed = 1;
- }
-
- else if (!strcasecmp(key, "Message-ID")) {
- if (msg->cm_fields['I'] != NULL) {
- lprintf(5, "duplicate message id\n");
- }
-
- if (msg->cm_fields['I'] == NULL) {
- msg->cm_fields['I'] = strdoop(value);
-
- /* Strip angle brackets */
- while (haschar(msg->cm_fields['I'], '<') > 0) {
- strcpy(&msg->cm_fields['I'][0],
- &msg->cm_fields['I'][1]);
- }
- for (i = 0; i<strlen(msg->cm_fields['I']); ++i)
- if (msg->cm_fields['I'][i] == '>')
- msg->cm_fields['I'][i] = 0;
- }
-
- processed = 1;
- }
-
- /* Clean up and move on. */
- phree(key); /* Don't free 'value', it's actually the same buffer */
- return(processed);
-}
-
-
-/*
- * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
- * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
- * will be deallocated when CtdlFreeMessage() is called. Therefore, the
- * supplied buffer should be DEREFERENCED. It should not be freed or used
- * again.
- */
-struct CtdlMessage *convert_internet_message(char *rfc822) {
-
- struct CtdlMessage *msg;
- int pos, beg, end, msglen;
- int done;
- char buf[SIZ];
- int converted;
-
- msg = mallok(sizeof(struct CtdlMessage));
- if (msg == NULL) return msg;
-
- memset(msg, 0, sizeof(struct CtdlMessage));
- msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
- msg->cm_anon_type = 0; /* never anonymous */
- msg->cm_format_type = FMT_RFC822; /* internet message */
- msg->cm_fields['M'] = rfc822;
-
- lprintf(9, "Unconverted RFC822 message length = %ld\n", (long)strlen(rfc822));
- pos = 0;
- done = 0;
-
- while (!done) {
-
- /* Locate beginning and end of field, keeping in mind that
- * some fields might be multiline
- */
- beg = pos;
- end = (-1);
-
- msglen = strlen(rfc822);
- while ( (end < 0) && (done == 0) ) {
-
- if ((rfc822[pos]=='\n')
- && (!isspace(rfc822[pos+1]))) {
- end = pos;
- }
-
- /* done with headers? (commented out; see below)
- if ( ((rfc822[pos]=='\n')
- ||(rfc822[pos]=='\r') )
- && ( (rfc822[pos+1]=='\n')
- ||(rfc822[pos+1]=='\r')) ) {
- end = pos;
- done = 1;
- }
- */
-
- /* done with headers? (try this way instead) */
- if ( (rfc822[pos]=='\n')
- && ( (rfc822[pos+1]=='\n')
- ||(rfc822[pos+1]=='\r')) ) {
- end = pos;
- done = 1;
- }
-
- if (pos >= (msglen-1) ) {
- end = pos;
- done = 1;
- }
-
- ++pos;
-
- }
-
- /* At this point we have a field. Are we interested in it? */
- converted = convert_field(msg, beg, end);
-
- /* Strip the field out of the RFC822 header if we used it */
- if (converted) {
- strcpy(&rfc822[beg], &rfc822[pos]);
- pos = beg;
- }
-
- /* If we've hit the end of the message, bail out */
- if (pos > strlen(rfc822)) done = 1;
- }
-
- /* Follow-up sanity checks... */
-
- /* If there's no timestamp on this message, set it to now. */
- if (msg->cm_fields['T'] == NULL) {
- snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
- msg->cm_fields['T'] = strdoop(buf);
- }
-
- lprintf(9, "RFC822 length remaining after conversion = %ld\n",
- (long)strlen(rfc822));
- return msg;
-}
-
-
-
-/*
- * Look for a particular header field in an RFC822 message text. If the
- * requested field is found, it is unfolded (if necessary) and returned to
- * the caller. The field name is stripped out, leaving only its contents.
- * The caller is responsible for freeing the returned buffer. If the requested
- * field is not present, or anything else goes wrong, it returns NULL.
- */
-char *rfc822_fetch_field(char *rfc822, char *fieldname) {
- int pos = 0;
- int beg, end;
- int done = 0;
- int colonpos, i;
- char *fieldbuf = NULL;
-
- /* Should never happen, but sometimes we get stupid */
- if (rfc822 == NULL) return(NULL);
- if (fieldname == NULL) return(NULL);
-
- while (!done) {
-
- /* Locate beginning and end of field, keeping in mind that
- * some fields might be multiline
- */
- beg = pos;
- end = (-1);
- for (pos=beg; ((pos<=strlen(rfc822))&&(end<0)); ++pos) {
- if ((rfc822[pos]=='\n')
- && (!isspace(rfc822[pos+1]))) {
- end = pos;
- }
- if ( (rfc822[pos]=='\n') /* done w. headers? */
- && ( (rfc822[pos+1]=='\n')
- ||(rfc822[pos+1]=='\r'))) {
- end = pos;
- done = 1;
- }
-
- }
-
- /* At this point we have a field. Is it The One? */
- if (end > beg) {
- fieldbuf = mallok((end-beg)+3);
- if (fieldbuf == NULL) return(NULL);
- safestrncpy(fieldbuf, &rfc822[beg], (end-beg)+1);
- unfold_rfc822_field(fieldbuf);
- colonpos = (-1);
- for (i = strlen(fieldbuf); i >= 0; --i) {
- if (fieldbuf[i] == ':') colonpos = i;
- }
- if (colonpos > 0) {
- fieldbuf[colonpos] = 0;
- if (!strcasecmp(fieldbuf, fieldname)) {
- strcpy(fieldbuf, &fieldbuf[colonpos+1]);
- striplt(fieldbuf);
- return(fieldbuf);
- }
- }
- phree(fieldbuf);
- }
-
- /* If we've hit the end of the message, bail out */
- if (pos > strlen(rfc822)) done = 1;
- }
- return(NULL);
-}
-
-
-
-/*****************************************************************************
- * DIRECTORY MANAGEMENT FUNCTIONS *
- *****************************************************************************/
-
-/*
- * Generate the index key for an Internet e-mail address to be looked up
- * in the database.
- */
-void directory_key(char *key, char *addr) {
- int i;
- int keylen = 0;
-
- for (i=0; i<strlen(addr); ++i) {
- if (!isspace(addr[i])) {
- key[keylen++] = tolower(addr[i]);
- }
- }
- key[keylen++] = 0;
-
- lprintf(9, "Directory key is <%s>\n", key);
-}
-
-
-
-/* Return nonzero if the supplied address is in a domain we keep in
- * the directory
- */
-int IsDirectory(char *addr) {
- char domain[SIZ];
- int h;
-
- extract_token(domain, addr, 1, '@');
- striplt(domain);
-
- h = CtdlHostAlias(domain);
- lprintf(9, "IsDirectory(%s)\n", domain);
-
- if ( (h == hostalias_localhost) || (h == hostalias_directory) ) {
- lprintf(9, " ...yes\n");
- return(1);
- }
- else {
- lprintf(9, " ...no\n");
- return(0);
- }
-}
-
-
-/*
- * Initialize the directory database (erasing anything already there)
- */
-void CtdlDirectoryInit(void) {
- cdb_trunc(CDB_DIRECTORY);
-}
-
-
-/*
- * Add an Internet e-mail address to the directory for a user
- */
-void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
- char key[SIZ];
-
- lprintf(9, "Dir: %s --> %s\n",
- internet_addr, citadel_addr);
- if (IsDirectory(internet_addr) == 0) return;
-
- directory_key(key, internet_addr);
-
- cdb_store(CDB_DIRECTORY, key, strlen(key),
- citadel_addr, strlen(citadel_addr)+1 );
-}
-
-
-/*
- * Delete an Internet e-mail address from the directory.
- *
- * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
- * here because the callback API expects to be able to send it.)
- */
-void CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
- char key[SIZ];
-
- directory_key(key, internet_addr);
- cdb_delete(CDB_DIRECTORY, key, strlen(key) );
-}
-
-
-/*
- * Look up an Internet e-mail address in the directory.
- * On success: returns 0, and Citadel address stored in 'target'
- * On failure: returns nonzero
- */
-int CtdlDirectoryLookup(char *target, char *internet_addr) {
- struct cdbdata *cdbrec;
- char key[SIZ];
-
- if (IsDirectory(internet_addr) == 0) return(-1);
-
- directory_key(key, internet_addr);
- cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
- if (cdbrec != NULL) {
- safestrncpy(target, cdbrec->ptr, SIZ);
- cdb_free(cdbrec);
- return(0);
- }
-
- return(-1);
-}
projects / citadel.git / blobdiff