* duplicate memreadline & bmstrcasestr to a const and non const version
[citadel.git] / citadel / internet_addressing.c
index 8661d70fa12cfae5f734e1affdb24dfd02d9530d..7a9f4b07816810967e106731f4e2781ddb675c36 100644 (file)
@@ -44,6 +44,7 @@
 #include "parsedate.h"
 #include "database.h"
 
+#include "ctdl_module.h"
 
 #ifndef HAVE_SNPRINTF
 #include "snprintf.h"
 #ifdef HAVE_ICONV
 #include <iconv.h>
 
-/*
- * Wrapper around iconv_open()
- * Our version adds aliases for non-standard Microsoft charsets
- * such as 'MS950', aliasing them to names like 'CP950'
- *
- * tocode      Target encoding
- * fromcode    Source encoding
- */
-iconv_t ctdl_iconv_open(const char *tocode, const char *fromcode)
-{
-       iconv_t ic = (iconv_t)(-1) ;
-       ic = iconv_open(tocode, fromcode);
-       if (ic == (iconv_t)(-1) ) {
-               char alias_fromcode[64];
-               if ( (strlen(fromcode) == 5) && (!strncasecmp(fromcode, "MS", 2)) ) {
-                       safestrncpy(alias_fromcode, fromcode, sizeof alias_fromcode);
-                       alias_fromcode[0] = 'C';
-                       alias_fromcode[1] = 'P';
-                       ic = iconv_open(tocode, alias_fromcode);
-               }
-       }
-       return(ic);
-}
-
 #if 0
 /* This is the non-define version in case of s.b. needing to debug */
 inline void FindNextEnd (char *bptr, char *end)
@@ -141,7 +118,7 @@ void utf8ify_rfc822_string(char *buf) {
        if (illegal_non_rfc2047_encoding) {
                const char *default_header_charset = "iso-8859-1";
                if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
-                       ic = ctdl_iconv_open("UTF-8", default_header_charset);
+                       ctdl_iconv_open("UTF-8", default_header_charset, &ic);
                        if (ic != (iconv_t)(-1) ) {
                                ibuf = malloc(1024);
                                isav = ibuf;
@@ -243,7 +220,7 @@ void utf8ify_rfc822_string(char *buf) {
                        ibuflen = strlen(istr);
                }
 
-               ic = ctdl_iconv_open("UTF-8", charset);
+               ctdl_iconv_open("UTF-8", charset, &ic);
                if (ic != (iconv_t)(-1) ) {
                        obuflen = 1024;
                        obuf = (char *) malloc(obuflen);
@@ -319,6 +296,7 @@ int CtdlHostAlias(char *fqdn) {
        int i;
        char buf[256];
        char host[256], type[256];
+       int found = 0;
 
        if (fqdn == NULL) return(hostalias_nomatch);
        if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
@@ -333,18 +311,23 @@ int CtdlHostAlias(char *fqdn) {
                extract_token(host, buf, 0, '|', sizeof host);
                extract_token(type, buf, 1, '|', sizeof type);
 
-               if ( (!strcasecmp(type, "localhost"))
-                  && (!strcasecmp(fqdn, host)))
-                       return(hostalias_localhost);
+               found = 0;
 
-               if ( (!strcasecmp(type, "directory"))
-                  && (!strcasecmp(fqdn, host)))
-                       return(hostalias_directory);
+               /* Process these in a specific order, in case there are multiple matches.
+                * We want directory to override masq, for example.
+                */
 
-               if ( (!strcasecmp(type, "masqdomain"))
-                  && (!strcasecmp(fqdn, host)))
-                       return(hostalias_masq);
+               if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
+                       found = hostalias_masq;
+               }
+               if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
+                       found = hostalias_localhost;
+               }
+               if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
+                       found = hostalias_directory;
+               }
 
+               if (found) return(found);
        }
 
        return(hostalias_nomatch);
@@ -384,22 +367,53 @@ int fuzzy_match(struct ctdluser *us, char *matchstring) {
 /*
  * Unfold a multi-line field into a single line, removing multi-whitespaces
  */
-void unfold_rfc822_field(char *field) {
-       int i;
+void unfold_rfc822_field(char **field, char **FieldEnd) 
+{
        int quote = 0;
+       char *pField = *field;
+       char *sField;
+       char *pFieldEnd = *FieldEnd;
 
-       striplt(field);         /* remove leading/trailing whitespace */
+       while (isspace(*pField))
+               pField++;
+       /* remove leading/trailing whitespace */
+       ;
 
+       while (isspace(*pFieldEnd))
+               pFieldEnd --;
+
+       *FieldEnd = pFieldEnd;
        /* 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]);
+       for (sField = *field = pField; 
+            sField < pFieldEnd; 
+            pField++, sField++)
+       {
+               if ((*sField=='\r') || (*sField=='\n')) {
+                       while (isspace(*sField))
+                               sField++;
+                       *pField = *sField;
+               }
+               else {
+                       if (*sField=='\"') quote = 1 - quote;
+                       if (!quote) {
+                               if (isspace(*sField))
+                               {
+                                       *pField = ' ';
+                                       pField++;
+                                       sField++;
+                                       
+                                       while ((sField < pFieldEnd) && 
+                                              isspace(*sField))
+                                               sField++;
+                                       *pField = *sField;
+                               }
+                               else *pField = *sField;
                        }
+                       else *pField = *sField;
                }
        }
+       *pField = '\0';
+       *FieldEnd = pField - 1;
 }
 
 
@@ -540,11 +554,12 @@ void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
  * 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 convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
+       char *key, *value, *valueend;
+       long len;
+       const char *pos;
        int i;
-       int colonpos = (-1);
+       const char *colonpos = NULL;
        int processed = 0;
        char buf[SIZ];
        char user[1024];
@@ -552,19 +567,25 @@ int convert_field(struct CtdlMessage *msg, int beg, int end) {
        char name[1024];
        char addr[1024];
        time_t parsed_date;
+       long valuelen;
 
-       rfc822 = msg->cm_fields['M'];   /* M field contains rfc822 text */
-       for (i = end; i >= beg; --i) {
-               if (rfc822[i] == ':') colonpos = i;
+       for (pos = end; pos >= beg; pos--) {
+               if (*pos == ':') colonpos = pos;
        }
 
-       if (colonpos < 0) return(0);    /* no colon? not a valid header line */
+       if (colonpos == NULL) return(0);        /* no colon? not a valid header line */
 
-       key = malloc((end - beg) + 2);
-       safestrncpy(key, &rfc822[beg], (end-beg)+1);
-       key[colonpos - beg] = 0;
+       len = end - beg;
+       key = malloc(len + 2);
+       memcpy(key, beg, len + 1);
+       key[len] = '\0';
+       valueend = key + len;
+       * ( key + (colonpos - beg) ) = '\0';
        value = &key[(colonpos - beg) + 1];
-       unfold_rfc822_field(value);
+/*     printf("Header: [%s]\nValue: [%s]\n", key, value); */
+       unfold_rfc822_field(&value, &valueend);
+       valuelen = valueend - value + 1;
+/*     printf("UnfoldedValue: [%s]\n", value); */
 
        /*
         * Here's the big rfc822-to-citadel loop.
@@ -596,25 +617,25 @@ int convert_field(struct CtdlMessage *msg, int beg, int end) {
 
        else if (!strcasecmp(key, "Subject")) {
                if (msg->cm_fields['U'] == NULL)
-                       msg->cm_fields['U'] = strdup(value);
+                       msg->cm_fields['U'] = strndup(value, valuelen);
                processed = 1;
        }
 
        else if (!strcasecmp(key, "List-ID")) {
                if (msg->cm_fields['L'] == NULL)
-                       msg->cm_fields['L'] = strdup(value);
+                       msg->cm_fields['L'] = strndup(value, valuelen);
                processed = 1;
        }
 
        else if (!strcasecmp(key, "To")) {
                if (msg->cm_fields['R'] == NULL)
-                       msg->cm_fields['R'] = strdup(value);
+                       msg->cm_fields['R'] = strndup(value, valuelen);
                processed = 1;
        }
 
        else if (!strcasecmp(key, "CC")) {
                if (msg->cm_fields['Y'] == NULL)
-                       msg->cm_fields['Y'] = strdup(value);
+                       msg->cm_fields['Y'] = strndup(value, valuelen);
                processed = 1;
        }
 
@@ -624,7 +645,7 @@ int convert_field(struct CtdlMessage *msg, int beg, int end) {
                }
 
                if (msg->cm_fields['I'] == NULL) {
-                       msg->cm_fields['I'] = strdup(value);
+                       msg->cm_fields['I'] = strndup(value, valuelen);
 
                        /* Strip angle brackets */
                        while (haschar(msg->cm_fields['I'], '<') > 0) {
@@ -641,13 +662,13 @@ int convert_field(struct CtdlMessage *msg, int beg, int end) {
 
        else if (!strcasecmp(key, "Return-Path")) {
                if (msg->cm_fields['P'] == NULL)
-                       msg->cm_fields['P'] = strdup(value);
+                       msg->cm_fields['P'] = strndup(value, valuelen);
                processed = 1;
        }
 
        else if (!strcasecmp(key, "Envelope-To")) {
                if (msg->cm_fields['V'] == NULL)
-                       msg->cm_fields['V'] = strdup(value);
+                       msg->cm_fields['V'] = strndup(value, valuelen);
                processed = 1;
        }
 
@@ -655,13 +676,13 @@ int convert_field(struct CtdlMessage *msg, int beg, int end) {
                if (msg->cm_fields['W'] != NULL) {
                        free(msg->cm_fields['W']);
                }
-               msg->cm_fields['W'] = strdup(value);
+               msg->cm_fields['W'] = strndup(value, valuelen);
                processed = 1;
        }
 
        else if (!strcasecmp(key, "In-reply-to")) {
                if (msg->cm_fields['W'] == NULL) {              /* References: supersedes In-reply-to: */
-                       msg->cm_fields['W'] = strdup(value);
+                       msg->cm_fields['W'] = strndup(value, valuelen);
                }
                processed = 1;
        }
@@ -717,12 +738,21 @@ void convert_references_to_wefewences(char *str) {
  * again.
  */
 struct CtdlMessage *convert_internet_message(char *rfc822) {
+       StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
+       free (rfc822);
+       return convert_internet_message_buf(&RFCBuf);
+}
+
 
+
+struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
+{
        struct CtdlMessage *msg;
-       int pos, beg, end, msglen;
-       int done;
+       const char *pos, *beg, *end, *totalend;
+       int done, alldone = 0;
        char buf[SIZ];
        int converted;
+       StrBuf *OtherHeaders;
 
        msg = malloc(sizeof(struct CtdlMessage));
        if (msg == NULL) return msg;
@@ -731,36 +761,40 @@ struct CtdlMessage *convert_internet_message(char *rfc822) {
        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;
 
-       pos = 0;
+       pos = ChrPtr(*rfc822);
+       totalend = pos + StrLength(*rfc822);
        done = 0;
+       OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
 
-       while (!done) {
+       while (!alldone) {
 
                /* Locate beginning and end of field, keeping in mind that
                 * some fields might be multiline
                 */
-               beg = pos;
-               end = (-1);
+               end = beg = pos;
 
-               msglen = strlen(rfc822);        
-               while ( (end < 0) && (done == 0) ) {
+               while ((end < totalend) && 
+                      (end == beg) && 
+                      (done == 0) ) 
+               {
 
-                       if ((rfc822[pos]=='\n')
-                          && (!isspace(rfc822[pos+1]))) {
+                       if ((*pos=='\n') &&
+                           (!isspace(*(pos+1)))) 
+                       {
                                end = pos;
                        }
 
                        /* done with headers? */
-                       if (   (rfc822[pos]=='\n')
-                          && ( (rfc822[pos+1]=='\n')
-                             ||(rfc822[pos+1]=='\r')) ) {
-                               end = pos;
-                               done = 1;
+                       if ((*pos=='\n') &&
+                           ( (*(pos+1)=='\n') ||
+                             (*(pos+1)=='\r')) ) 
+                       {
+                               alldone = 1;
                        }
 
-                       if (pos >= (msglen-1) ) {
+                       if (pos >= (totalend - 1) )
+                       {
                                end = pos;
                                done = 1;
                        }
@@ -773,14 +807,20 @@ struct CtdlMessage *convert_internet_message(char *rfc822) {
                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 (!converted) {
+                       StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
+                       StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
                }
 
                /* If we've hit the end of the message, bail out */
-               if (pos > strlen(rfc822)) done = 1;
+               if (pos >= totalend)
+                       alldone = 1;
        }
+       StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
+       if (pos < totalend)
+               StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
+       FreeStrBuf(rfc822);
+       msg->cm_fields['M'] = SmashStrBuf(&OtherHeaders);
 
        /* Follow-up sanity checks... */
 
@@ -809,11 +849,11 @@ struct CtdlMessage *convert_internet_message(char *rfc822) {
  * 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) {
+char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
        char *fieldbuf = NULL;
-       char *end_of_headers;
-       char *field_start;
-       char *ptr;
+       const char *end_of_headers;
+       const char *field_start;
+       const char *ptr;
        char *cont;
        char fieldhdr[SIZ];
 
@@ -824,13 +864,13 @@ char *rfc822_fetch_field(char *rfc822, char *fieldname) {
        snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
 
        /* Locate the end of the headers, so we don't run past that point */
-       end_of_headers = bmstrcasestr(rfc822, "\n\r\n");
+       end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
        if (end_of_headers == NULL) {
-               end_of_headers = bmstrcasestr(rfc822, "\n\n");
+               end_of_headers = cbmstrcasestr(rfc822, "\n\n");
        }
        if (end_of_headers == NULL) return (NULL);
 
-       field_start = bmstrcasestr(rfc822, fieldhdr);
+       field_start = cbmstrcasestr(rfc822, fieldhdr);
        if (field_start == NULL) return(NULL);
        if (field_start > end_of_headers) return(NULL);
 
@@ -838,11 +878,11 @@ char *rfc822_fetch_field(char *rfc822, char *fieldname) {
        strcpy(fieldbuf, "");
 
        ptr = field_start;
-       ptr = memreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
+       ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
        while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
                strcat(fieldbuf, " ");
                cont = &fieldbuf[strlen(fieldbuf)];
-               ptr = memreadline(ptr, cont, SIZ-strlen(fieldbuf) );
+               ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
                striplt(cont);
        }
 
@@ -916,14 +956,10 @@ void CtdlDirectoryInit(void) {
 void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
        char key[SIZ];
 
-       CtdlLogPrintf(CTDL_DEBUG, "Dir: %s --> %s\n",
-               internet_addr, citadel_addr);
        if (IsDirectory(internet_addr, 0) == 0) return;
-
+       CtdlLogPrintf(CTDL_DEBUG, "Create directory entry: %s --> %s\n", internet_addr, citadel_addr);
        directory_key(key, internet_addr);
-
-       cdb_store(CDB_DIRECTORY, key, strlen(key),
-               citadel_addr, strlen(citadel_addr)+1 );
+       cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
 }
 
 
@@ -936,6 +972,7 @@ void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
 void CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
        char key[SIZ];
 
+       CtdlLogPrintf(CTDL_DEBUG, "Delete directory entry: %s --> %s\n", internet_addr, citadel_addr);
        directory_key(key, internet_addr);
        cdb_delete(CDB_DIRECTORY, key, strlen(key) );
 }