#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
+#include <ctype.h>
#include <signal.h>
#include <pwd.h>
#include <errno.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 ways of addressing
- * a user. It may even be appropriate to move this out of SMTP and
- * into the server core.
+ * FIX ... this needs to be updated to match any and all address syntaxes.
*/
int fuzzy_match(struct usersupp *us, char *matchstring) {
int a;
}
+/*
+ * 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 */
+
+ 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);
+
+ lprintf(9, "Key=<%s> Value=<%s>\n", key, value);
+
+ /* Here's the big rfc822-to-citadel loop. */
+
+ if (!strcasecmp(key, "Date")) {
+ sprintf(buf, "%ld", parsedate(value) );
+ 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);
+ lprintf(9, "Converted to <%s@%s> (%s)\n", user, node, name);
+ if (msg->cm_fields['A'] == NULL)
+ msg->cm_fields['A'] = user;
+ else
+ phree(user);
+ if (msg->cm_fields['N'] == NULL)
+ msg->cm_fields['N'] = node;
+ else
+ phree(node);
+ if (msg->cm_fields['H'] == NULL)
+ msg->cm_fields['H'] = name;
+ else
+ phree(name);
+ processed = 1;
+ }
+
+ else if (!strcasecmp(key, "Subject")) {
+ if (msg->cm_fields['U'] == NULL)
+ msg->cm_fields['U'] = strdoop(value);
+ 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.
+ */
+struct CtdlMessage *convert_internet_message(char *rfc822) {
+
+ struct CtdlMessage *msg;
+ int pos, beg, end;
+ 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 = FMT_RFC822; /* internet message */
+ msg->cm_fields['M'] = rfc822;
+
+ lprintf(9, "Unconverted RFC822 message length = %d\n", 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);
+ }
+
+ lprintf(9, "RFC822 length remaining after conversion = %d\n",
+ strlen(rfc822));
+ return msg;
+}
+
projects / citadel.git / blobdiff