+++ /dev/null
-/*
- * $Id$
- *
- * This file contains functions which handle the mapping of Internet addresses
- * to users on the Citadel system.
- */
-
-#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>
-#include <sys/time.h>
-#include <sys/wait.h>
-#include <string.h>
-#include <limits.h>
-#include "citadel.h"
-#include "server.h"
-#include <time.h>
-#include "sysdep_decls.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "tools.h"
-#include "internet_addressing.h"
-#include "user_ops.h"
-#include "parsedate.h"
-
-
-
-/*
- * Return 0 if a given string fuzzy-matches a Citadel user account
- *
- * FIX ... this needs to be updated to match any and all address syntaxes.
- */
-int fuzzy_match(struct usersupp *us, char *matchstring) {
- int a;
-
- 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
- * (Originally from citmail.c, and unchanged so far)
- *
- */
-void process_rfc822_addr(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);
- for (a = 0; a < strlen(name); ++a) {
- if (name[a] == '<') {
- do {
- strcpy(&name[a], &name[a + 1]);
- } while ((strlen(name) > 0) && (name[a] != '>'));
- strcpy(&name[a], &name[a + 1]);
- }
- }
- /* 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);
- while ((strlen(name) > 0) && (name[0] != '(')) {
- strcpy(&name[0], &name[1]);
- }
- strcpy(&name[0], &name[1]);
- for (a = 0; a < strlen(name); ++a) {
- if (name[a] == ')') {
- name[a] = 0;
- }
- }
- }
- /* 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 */
- for (a = 0; a < strlen(user); ++a)
- if (user[a] == '(') {
- do {
- strcpy(&user[a], &user[a + 1]);
- } while ((strlen(user) > 0) && (user[a] != ')'));
- strcpy(&user[a], &user[a + 1]);
- }
- /* if there's a set of angle brackets, strip it down to that */
- if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
- while ((strlen(user) > 0) && (user[0] != '<')) {
- strcpy(&user[0], &user[1]);
- }
- strcpy(&user[0], &user[1]);
- for (a = 0; a < strlen(user); ++a)
- if (user[a] == '>')
- user[a] = 0;
- }
- /* 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 */
- for (a = 0; a < strlen(node); ++a)
- if (node[a] == '(') {
- do {
- strcpy(&node[a], &node[a + 1]);
- } while ((strlen(node) > 0) && (node[a] != ')'));
- strcpy(&node[a], &node[a + 1]);
- }
- /* if there's a set of angle brackets, strip it down to that */
- if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
- while ((strlen(node) > 0) && (node[0] != '<')) {
- strcpy(&node[0], &node[1]);
- }
- strcpy(&node[0], &node[1]);
- for (a = 0; a < strlen(node); ++a)
- if (node[a] == '>')
- node[a] = 0;
- }
- /* 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);
-}
-
-
-
-/*
- * Back end for convert_internet_address()
- * (Compares an internet name [buffer1] and stores in [buffer2] if found)
- */
-void try_name(struct usersupp *us) {
-
- if (!strncasecmp(CC->buffer1, "cit", 3))
- if (atol(&CC->buffer1[3]) == us->usernum)
- strcpy(CC->buffer2, us->fullname);
-
- if (!collapsed_strcmp(CC->buffer1, us->fullname))
- strcpy(CC->buffer2, us->fullname);
-
- if (us->uid != BBSUID)
- if (!strcasecmp(CC->buffer1, getpwuid(us->uid)->pw_name))
- strcpy(CC->buffer2, us->fullname);
-}
-
-
-
-/*
- * Convert an Internet email address to a Citadel user/host combination
- */
-int convert_internet_address(char *destuser, char *desthost, char *source)
-{
- char user[256];
- char node[256];
- char name[256];
-
- /* Split it up */
- process_rfc822_addr(source, user, node, name);
-
- /* Map the FQDN to a Citadel node name
- * FIX ... we have to check for all known aliases for the local
- * system, and also handle gateway domains, etc. etc.
- */
- if (!strcasecmp(node, config.c_fqdn)) {
- strcpy(node, config.c_nodename);
- }
-
- /* Return an error condition if the node is not known.
- * FIX ... make this work for non-local systems
- */
- if (strcasecmp(node, config.c_nodename)) {
- return(rfc822_address_invalid);
- }
-
- /* Now try to resolve the name
- * FIX ... do the multiple-addresses thing
- */
- if (!strcasecmp(node, config.c_nodename)) {
- strcpy(destuser, user);
- strcpy(desthost, config.c_nodename);
- strcpy(CC->buffer1, user);
- strcpy(CC->buffer2, "");
- ForEachUser(try_name);
- if (strlen(CC->buffer2) == 0) return(rfc822_no_such_user);
- strcpy(destuser, CC->buffer2);
- return(rfc822_address_locally_validated);
- }
-
- return(rfc822_address_invalid); /* unknown error */
-}
-
-
-
-
-/*
- * 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[256];
- char *user, *node, *name;
-
- 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 */
-
- value = mallok((end - beg) + 2);
- safestrncpy(value, &rfc822[beg], (end-beg)+1);
- key = value;
- key[colonpos - beg] = 0;
- value = &key[(colonpos - beg) + 1];
- unfold_rfc822_field(value);
-
- /* Here's the big rfc822-to-citadel loop. */
-
- if (!strcasecmp(key, "Date")) {
- lprintf(9, "converting date <%s>\n", value);
- sprintf(buf, "%ld", parsedate(value) );
- lprintf(9, "parsed value is <%s>\n", buf);
- if (msg->cm_fields['T'] != NULL)
- msg->cm_fields['T'] = strdoop(buf);
- processed = 1;
- }
-
- else if (!strcasecmp(key, "From")) {
- user = mallok(strlen(value));
- node = mallok(strlen(value));
- name = mallok(strlen(value));
- process_rfc822_addr(value, user, node, name);
- if (msg->cm_fields['A'] != NULL)
- msg->cm_fields['A'] = strdoop(user);
- if (msg->cm_fields['N'] != NULL)
- msg->cm_fields['N'] = strdoop(node);
- if (msg->cm_fields['H'] != NULL)
- msg->cm_fields['H'] = strdoop(name);
- phree(user);
- phree(node);
- phree(name);
- processed = 1;
- }
-
- else if (!strcasecmp(key, "Subject")) {
- if (msg->cm_fields['U'] != NULL)
- msg->cm_fields['U'] = strdoop(key);
- processed = 1;
- }
-
- /* Clean up and move on. */
- lprintf(9, "Field: key=<%s> value=<%s> processed=%d\n",
- key, value, processed);
- phree(key); /* Don't free 'value', it's actually the same buffer */
- return(processed);
-}
-
-
-/*
- * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
- */
-struct CtdlMessage *convert_internet_message(char *rfc822) {
-
- struct CtdlMessage *msg;
- int pos, beg, end;
- int msglen;
- int done;
- char buf[256];
- 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 = 4; /* always MIME */
- msg->cm_fields['M'] = rfc822;
-
- /* FIX there's plenty to do here. */
- msglen = 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);
- 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. Are we interested in it? */
- converted = convert_field(msg, beg, end);
- 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) {
- sprintf(buf, "%ld", time(NULL));
- msg->cm_fields['T'] = strdoop(buf);
- }
-
- return msg;
-}
-
projects / citadel.git / blobdiff