/*
 *  uat.c
 *
 * $Id$
 *
 *  User Accessible Tables
 *  Mantain an array of user accessible data strucures
 *
 * (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 2001 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <stdarg.h>

#include <glib.h>

#include <wsutil/file_util.h>
#include <wsutil/str_util.h>

#include <epan/emem.h>
#include <epan/report_err.h>
#include <epan/filesystem.h>
#include <epan/packet.h>
#include <epan/range.h>

#include "uat-int.h"

static GPtrArray* all_uats = NULL;

void uat_init(void) {
    all_uats = g_ptr_array_new();
}

uat_t* uat_new(const char* name,
               size_t size,
               const char* filename,
               gboolean from_profile,
               void** data_ptr,
               guint* numitems_ptr,
               const char* category,
               const char* help,
               uat_copy_cb_t copy_cb,
               uat_update_cb_t update_cb,
               uat_free_cb_t free_cb,
               uat_post_update_cb_t post_update_cb,
               uat_field_t* flds_array) {
    /* Create new uat */
    uat_t* uat = g_malloc(sizeof(uat_t));
    guint i;

    /* Add to global array of uats */
    if (!all_uats)
        all_uats = g_ptr_array_new();

    g_ptr_array_add(all_uats,uat);

    /* Check params */
    g_assert(name && size && filename && data_ptr && numitems_ptr);

    /* Set uat values from inputs */
    uat->name = g_strdup(name);
    uat->record_size = size;
    uat->filename = g_strdup(filename);
    uat->from_profile = from_profile;
    uat->user_ptr = data_ptr;
    uat->nrows_p = numitems_ptr;
    uat->copy_cb = copy_cb;
    uat->update_cb = update_cb;
    uat->free_cb = free_cb;
    uat->post_update_cb = post_update_cb;
    uat->fields = flds_array;
    uat->user_data = g_array_new(FALSE,FALSE,(guint)uat->record_size);
    uat->changed = FALSE;
    uat->loaded = FALSE;
    uat->from_global = FALSE;
    uat->rep = NULL;
    uat->free_rep = NULL;
    uat->help = help;
    uat->category = category;

    for (i=0;flds_array[i].title;i++) {
        fld_data_t* f = g_malloc(sizeof(fld_data_t));

        f->colnum = i+1;
        f->rep = NULL;
        f->free_rep = NULL;

        flds_array[i].priv = f;
    }

    uat->ncols = i;

    *data_ptr = NULL;
    *numitems_ptr = 0;

    return uat;
}

void* uat_add_record(uat_t* uat, const void* data) {
    void* rec;

    g_array_append_vals (uat->user_data, data, 1);

    rec = uat->user_data->data + (uat->record_size * (uat->user_data->len-1));

    if (uat->copy_cb) {
        uat->copy_cb(rec, data, (unsigned int) uat->record_size);
    }

    UAT_UPDATE(uat);

    return rec;
}

void uat_swap(uat_t* uat, guint a, guint b) {
    size_t s = uat->record_size;
    void* tmp = ep_alloc(s);

    g_assert( a < uat->user_data->len && b < uat->user_data->len );

    if (a == b) return;

    memcpy(tmp, UAT_INDEX_PTR(uat,a), s);
    memcpy(UAT_INDEX_PTR(uat,a), UAT_INDEX_PTR(uat,b), s);
    memcpy(UAT_INDEX_PTR(uat,b), tmp, s);

}

void uat_remove_record_idx(uat_t* uat, guint idx) {

    g_assert( idx < uat->user_data->len );

    if (uat->free_cb) {
        uat->free_cb(UAT_INDEX_PTR(uat,idx));
    }

    g_array_remove_index(uat->user_data, idx);

    UAT_UPDATE(uat);

}

/* The returned filename was g_malloc()'d so the caller must free it */
gchar* uat_get_actual_filename(uat_t* uat, gboolean for_writing) {
    gchar *pers_fname = NULL;

    if (! uat->from_global) {
        pers_fname =  get_persconffile_path(uat->filename, uat->from_profile, for_writing);
    }

    if ((! for_writing ) && (! file_exists(pers_fname) )) {
        gchar* data_fname = get_datafile_path(uat->filename);

        if (file_exists(data_fname)) {
            g_free(pers_fname);
            return data_fname;
        }

        g_free(data_fname);
        g_free(pers_fname);
        return NULL;
    }

    return pers_fname;
}

uat_t* uat_get_table_by_name(const char* name) {
    guint i;

    for (i=0; i < all_uats->len; i++) {
        uat_t* u = g_ptr_array_index(all_uats,i);
        if ( g_str_equal(u->name,name) ) {
            return (u);
        }
    }

    return NULL;
}

static void putfld(FILE* fp, void* rec, uat_field_t* f) {
    guint fld_len;
    const char* fld_ptr;

    f->cb.tostr(rec,&fld_ptr,&fld_len,f->cbdata.tostr,f->fld_data);

    switch(f->mode){
        case PT_TXTMOD_ENUM:
        case PT_TXTMOD_FILENAME:
        case PT_TXTMOD_DIRECTORYNAME:
        case PT_TXTMOD_STRING: {
            guint i;

            putc('"',fp);

            for(i=0;i<fld_len;i++) {
                char c = fld_ptr[i];

                if (c == '"' || c == '\\' || ! isprint((guchar)c) ) {
                    fprintf(fp,"\\x%.2x",c);
                } else {
                    putc(c,fp);
                }
            }

            putc('"',fp);
            return;
        }
        case PT_TXTMOD_HEXBYTES: {
            guint i;

            for(i=0;i<fld_len;i++) {
                fprintf(fp,"%.2x",((guint8*)fld_ptr)[i]);
            }

            return;
        }
        default:
            g_assert_not_reached();
    }
}

gboolean uat_save(uat_t* uat, char** error) {
    guint i;
    gchar* fname = uat_get_actual_filename(uat,TRUE);
    FILE* fp;

    if (! fname ) return FALSE;

    fp = ws_fopen(fname,"w");

    if (!fp && errno == ENOENT) {
        /* Parent directory does not exist, try creating first */
        gchar *pf_dir_path = NULL;
        if (create_persconffile_dir(&pf_dir_path) != 0) {
            *error = ep_strdup_printf("uat_save: error creating '%s'", pf_dir_path);
            g_free (pf_dir_path);
            return FALSE;
        }
        fp = ws_fopen(fname,"w");
    }

    if (!fp) {
        *error = ep_strdup_printf("uat_save: error opening '%s': %s",fname,g_strerror(errno));
        return FALSE;
    }

    *error = NULL;
    g_free (fname);

    fprintf(fp,"# This file is automatically generated, DO NOT MODIFY.\n");

    for ( i = 0 ; i < uat->user_data->len ; i++ ) {
        void* rec = uat->user_data->data + (uat->record_size * i);
        uat_field_t* f;
        guint j;

        f = uat->fields;


        for( j=0 ; j < uat->ncols ; j++ ) {
            putfld(fp, rec, &(f[j]));
            fputs((j == uat->ncols - 1) ? "\n" : "," ,fp);
        }

    }

    fclose(fp);

    uat->changed = FALSE;

    return TRUE;
}

void uat_destroy(uat_t* uat) {
    /* XXX still missing a destructor */
    g_ptr_array_remove(all_uats,uat);

}

uat_t *uat_find(gchar *name) {
    guint i;

    for (i=0; i < all_uats->len; i++) {
        uat_t* u = g_ptr_array_index(all_uats,i);

        if (strcmp(u->name, name) == 0 || strcmp(u->filename, name) == 0) {
            return u;
        }
    }
    return NULL;
}

void uat_clear(uat_t* uat) {
    guint i;

    for ( i = 0 ; i < uat->user_data->len ; i++ ) {
        if (uat->free_cb) {
            uat->free_cb(UAT_INDEX_PTR(uat,i));
        }
    }

    g_array_set_size(uat->user_data,0);

    *((uat)->user_ptr) = NULL;
    *((uat)->nrows_p) = 0;
}

void* uat_dup(uat_t* uat, guint* len_p) {
    guint size = (guint) (uat->record_size * uat->user_data->len);
    *len_p = size;
    return size ? g_memdup(uat->user_data->data,size) : NULL ;
}

void* uat_se_dup(uat_t* uat, guint* len_p) {
    guint size = (guint) (uat->record_size * uat->user_data->len);
    *len_p = (guint) size;
    return size ? se_memdup(uat->user_data->data,size) : NULL ;
}

void uat_unload_all(void) {
    guint i;

    for (i=0; i < all_uats->len; i++) {
        uat_t* u = g_ptr_array_index(all_uats,i);
        /* Do not unload if not in profile */
        if (u->from_profile) {
            uat_clear(u);
            u->loaded = FALSE;
        }
    }
}

void uat_cleanup(void) {
    while( all_uats->len ) {
        uat_destroy((uat_t*)all_uats->pdata);
    }

    g_ptr_array_free(all_uats,TRUE);
}


void uat_foreach_table(uat_cb_t cb,void* user_data) {
    guint i;

    for (i=0; i < all_uats->len; i++)
        cb(g_ptr_array_index(all_uats,i), user_data);

}


void uat_load_all(void) {
    guint i;
    gchar* err;

    for (i=0; i < all_uats->len; i++) {
        uat_t* u = g_ptr_array_index(all_uats,i);
        err = NULL;

        if (!u->loaded)
            uat_load(u, &err);

        if (err) {
            report_failure("Error loading table '%s': %s",u->name,err);
        }
    }
}


gboolean uat_fld_chk_str(void* u1 _U_, const char* strptr, unsigned len _U_, const void* u2 _U_, const void* u3 _U_, const char** err) {
    if (strptr == NULL) {
        *err = "NULL pointer";
        return FALSE;
    }

    *err = NULL;
    return TRUE;
}

gboolean uat_fld_chk_oid(void* u1 _U_, const char* strptr, unsigned len, const void* u2 _U_, const void* u3 _U_, const char** err) {
  unsigned int i;
    *err = NULL;

    if (strptr == NULL) {
      *err = "NULL pointer";
      return FALSE;
    }

    for(i = 0; i < len; i++)
      if(!(isdigit(strptr[i]) || strptr[i] == '.')) {
        *err = "Only digits [0-9] and \".\" allowed in an OID";
        break;
      }

    if(strptr[len-1] == '.')
      *err = "OIDs must not be terminated with a \".\"";

    if(!((*strptr == '0' || *strptr == '1' || *strptr =='2') && (len > 1 && strptr[1] == '.')))
      *err = "OIDs must start with \"0.\" (ITU-T assigned), \"1.\" (ISO assigned) or \"2.\" (joint ISO/ITU-T assigned)";

    /* should also check that the second arc is in the range 0-39 */

    return *err == NULL;
}

gboolean uat_fld_chk_proto(void* u1 _U_, const char* strptr, unsigned len, const void* u2 _U_, const void* u3 _U_, const char** err) {
    if (len) {
        char* name = ep_strndup(strptr,len);
        ascii_strdown_inplace(name);
        g_strchug(name);

        if (find_dissector(name)) {
            *err = NULL;
            return TRUE;
        } else {
            *err = "dissector not found";
            return FALSE;
        }
    } else {
        *err = NULL;
        return TRUE;
    }
}

gboolean uat_fld_chk_num_dec(void* u1 _U_, const char* strptr, unsigned len, const void* u2 _U_, const void* u3 _U_, const char** err) {
    if (len > 0) {
        char* str = ep_strndup(strptr,len);
        long i = strtol(str,&str,10);

        if ( ( i == 0) && (errno == ERANGE || errno == EINVAL) ) {
            *err = g_strerror(errno);
            return FALSE;
        }
    }

    *err = NULL;
    return TRUE;
}

gboolean uat_fld_chk_num_hex(void* u1 _U_, const char* strptr, unsigned len, const void* u2 _U_, const void* u3 _U_, const char** err) {
    if (len > 0) {
        char* str = ep_strndup(strptr,len);
        long i = strtol(str,&str,16);

        if ( ( i == 0) && (errno == ERANGE || errno == EINVAL) ) {
            *err = g_strerror(errno);
            return FALSE;
        }
    }

    *err = NULL;
    return TRUE;
}

gboolean uat_fld_chk_enum(void* u1 _U_, const char* strptr, unsigned len, const void* v, const void* u3 _U_, const char** err) {
    char* str = ep_strndup(strptr,len);
    guint i;
    const value_string* vs = v;

    for(i=0;vs[i].strptr;i++) {
        if (g_str_equal(vs[i].strptr,str)) {
            *err = NULL;
            return TRUE;
        }
    }

    *err = ep_strdup_printf("invalid value: %s",str);
    return FALSE;
}

gboolean uat_fld_chk_range(void* u1 _U_, const char* strptr, unsigned len, const void* v _U_, const void* u3, const char** err) {
    char* str = ep_strndup(strptr,len);
    range_t* r = NULL;
    convert_ret_t ret = range_convert_str(&r, str,GPOINTER_TO_UINT(u3));

    switch (  ret ) {
        case CVT_NO_ERROR:
            *err = NULL;
            return TRUE;
        case CVT_SYNTAX_ERROR:
            *err = ep_strdup_printf("syntax error in range: %s",str);
            return FALSE;
        case CVT_NUMBER_TOO_BIG:
            *err = ep_strdup_printf("value too large in range: '%s' (max = %u)",str,GPOINTER_TO_UINT(u3));
            return FALSE;
        default:
            *err = "This should not happen, it is a bug in wireshark! please report to wireshark-dev@wireshark.org";
            return FALSE;
    }
}

static int xton(char d) {
    switch(d) {
        case '0': return 0;
        case '1': return 1;
        case '2': return 2;
        case '3': return 3;
        case '4': return 4;
        case '5': return 5;
        case '6': return 6;
        case '7': return 7;
        case '8': return 8;
        case '9': return 9;
        case 'a':  case 'A': return 10;
        case 'b':  case 'B': return 11;
        case 'c':  case 'C': return 12;
        case 'd':  case 'D': return 13;
        case 'e':  case 'E': return 14;
        case 'f':  case 'F': return 15;
        default: return -1;
    }
}

char* uat_unbinstring(const char* si, guint in_len, guint* len_p) {
    guint8* buf;
    guint len = in_len/2;
    int i = 0;
    int d0, d1;

    if (in_len%2) {
        return NULL;
    }

    buf= g_malloc0(len+1);
    if (len_p) *len_p = len;

    while(in_len) {
        d1 = xton(*(si++));
        d0 = xton(*(si++));

        buf[i++] = (d1 * 16) + d0;

        in_len -= 2;
    }

    return (char*)buf;
}

char* uat_unesc(const char* si, guint in_len, guint* len_p) {
    char* buf = g_malloc0(in_len+1);
    char* p = buf;
    guint len = 0;
    const char* s;
    const char* in_end = si+in_len;

    for (s = (void*)si; s < in_end; s++) {
        switch(*s) {
            case '\\':
                switch(*(++s)) {
                    case 'a': *(p++) = '\a'; len++; break;
                    case 'b': *(p++) = '\b'; len++; break;
                    case 'e': *(p++) = '\033' /* '\e' is non ANSI-C */; len++; break;
                    case 'f': *(p++) = '\f'; len++; break;
                    case 'n': *(p++) = '\n'; len++; break;
                    case 'r': *(p++) = '\r'; len++; break;
                    case 't': *(p++) = '\t'; len++; break;
                    case 'v': *(p++) = '\v'; len++; break;

                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    {
                        int c0 = 0;
                        int c1 = 0;
                        int c2 = 0;
                        int c = 0;

                        c0 = (*s) - '0';

                        if ( s[1] >= '0' && s[1] <= '7' ) {
                            c1 = c0;
                            c0 = (*++s) - '0';

                            if ( s[1] >= '0' && s[1] <= '7' ) {
                                c2 = c1;
                                c1 = c0;
                                c0 = (*++s) - '0';
                            }
                        }
                        c = (64 * c2) + (8 * c1) + c0;
                        *(p++) = (char) (c > 255 ? 255 : c);
                        len++;
                        break;
                    }

                    case 'x':
                    {
                        char c1 = *(s+1);
                        char c0 = *(s+2);

                        if (isxdigit((guchar)c1) && isxdigit((guchar)c0)) {
                            *(p++) = (xton(c1) * 0x10) + xton(c0);
                            s += 2;
                        } else {
                            *(p++) = *s;
                        }
                        len++;
                        break;
                    }
                    default:
                        *p++ = *s;
                        break;
                }
                break;
            default:
                *(p++) = *s;
                len++;
                break;
        }
    }

    if (len_p) *len_p = len;
    return buf;
}

char* uat_undquote(const char* si, guint in_len, guint* len_p) {
    return uat_unesc(si+1,in_len-2,len_p);
}


char* uat_esc(const char* buf, guint len) {
    const guint8* end = ((guint8*)buf)+len;
    char* out = ep_alloc0((4*len)+1);
    const guint8* b;
    char* s = out;

    for (b = (void*)buf; b < end; b++) {
        if (isprint(*b) ) {
            *(s++) = (*b);
        } else {
            g_snprintf(s,5,"\\x%.2x",((guint)*b));
            s+=4;
        }
    }

    return out;

}

CHK_STR_IS_DEF(isprint)
CHK_STR_IS_DEF(isalpha)
CHK_STR_IS_DEF(isalnum)
CHK_STR_IS_DEF(isdigit)
CHK_STR_IS_DEF(isxdigit)

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */