mms_pdu.c

来自「mms client」· C语言 代码 · 共 568 行 · 第 1/2 页

                    p->field = unpack_nul_string(context); \
                    break;
#define OCTSTRE(field, fieldnr, docstring) \
                case fieldnr: \
                    p->field = e_unpack_ ## field(context); \
                    break;
#define REST(field, docstring) \
                case 0: \
                    p->field = parse_get_octets(context, parse_octets_left(context)); \
                    octstr_dump(p->field, 0); \
                    break; 
#include "mms_pdu.def"
#undef REST
#undef ENCSTRVAL
#undef ENCSTRVALE
#undef ULONG
#undef ULONGABSREL
#undef OCTSTR
#undef OCTSTRE
#undef MMSVERSION
#undef UINT
#undef PDU
	default:
		warning(0, "MMS PDU with unknown type %d", pdu->type);
        parse_context_destroy(context);
		mms_pdu_destroy(pdu);
		return NULL;
	}

    parse_context_destroy(context);
	
    return pdu;
}





int pack_value_length(Octstr *data, unsigned long len) {
    if (len > 30) 
        octstr_append_uintvar(data, len);
    else
        octstr_append_char(data, (int)len);
}


void pack_absoluterelative(Octstr *data, unsigned long value, int absrelindication) {
    Octstr *intvalue = octstr_create("");
    pack_integer_value(data, value);

    pack_value_length(data, octstr_len(intvalue) + 1);
    octstr_append_char(data, absrelindication);
    octstr_append(data, intvalue);
}


void pack_encoded_string(Octstr *data, Octstr *value, unsigned long charset) {
    unsigned long len;
    Octstr *charencoding;
    
    if (charset == (unsigned long)128 || charset == (unsigned long)0) {
        /* normal text string encoding */
        pack_text(data, value);
    }
    else {
        len = octstr_len(value);
        charencoding = octstr_create("");
        pack_integer_value(charencoding, charset);
        /* combined length */
        pack_value_length(data, len + (unsigned long)octstr_len(charencoding));
        /* the character encoding */
        octstr_append(data, charencoding);
        pack_text(data, value);
    }
}


/* some MMS pdu's have a very specific coding */

void e_pack_from(Octstr *data, Octstr *value, unsigned long charset) {
    Octstr *esv;
    if (data == NULL) {
        pack_value_length(data, 1);
        octstr_append_char(data, MMS_FALSE_TOKEN);
    }
    else {
        esv = octstr_create("");
        pack_encoded_string (data, value, charset);
        pack_value_length(data, 1 + octstr_len(esv));
        octstr_append_char(data, MMS_TRUE_TOKEN);
        octstr_append(data, esv);
    }

}

void e_pack_content_type(Octstr *data, Octstr *field) {
    pack_content_type(data, field);
}



/* rely on mms_pdu.def to have the first three fields in the
   right order */
Octstr *mms_pdu_pack(MMS_PDU *pdu) {
	Octstr *data;
	
    data = octstr_create("");

	switch (pdu->type) {
#define PDU(name, pdutype, docstring, fields, is_valid) \
	case name: { \
		struct name *p = &pdu->u.name; \
        octstr_append_char(data, 140); \
        octstr_append_char(data, pdutype); \
		fields \
	} break;
#define UINT(field, fieldnr, docstring) \
    if (p->field > 0) \
    { \
        octstr_append_char(data, fieldnr + 128); \
        octstr_append_char(data, p->field); \
    }
#define MMSVERSION(field, fieldnr, docstring) \
    octstr_append_char(data, fieldnr + 128); \
    pack_version_value(data, p->field);
#define ULONG(field, fieldnr, docstring) \
    if (p->field >= 0) { \
        octstr_append_char(data, fieldnr + 128); \
        pack_integer_value(data, p->field); \
    }
#define ULONGABSREL(field, fieldnr, docstring) \
    if (p->field >= 0) { \
        octstr_append_char(data, fieldnr + 128); \
        pack_absoluterelative(data, p->field, p->field ## _absrelind); \
    }
#define ENCSTRVAL(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        octstr_append_char(data, fieldnr + 128); \
        pack_encoded_string(data, p->field, p->field ## _charset); \
    }
#define ENCSTRVALE(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        octstr_append_char(data, fieldnr + 128); \
        e_pack_ ## field(data, p->field, p->field ## _charset); \
    }
#define OCTSTR(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        octstr_append_char(data, fieldnr + 128); \
        pack_text(data, p->field); \
    }
#define OCTSTRE(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        octstr_append_char(data, fieldnr + 128); \
        e_pack_ ## field(data, p->field); \
    }
#define REST(field, docstring) \
    if (p->field != NULL) \
        octstr_append(data, p->field);
#include "mms_pdu.def"
#undef REST
#undef ENCSTRVAL
#undef ENCSTRVALE
#undef ULONG
#undef ULONGABSREL
#undef OCTSTR
#undef OCTSTRE
#undef MMSVERSION
#undef UINT
#undef PDU
	default:
		panic(0, "Packing unknown MMS PDU type %ld", (long) pdu->type);
	}

	return data;
}



//* packing to xml format (for delivery to client software */

/* rely on mms_pdu.def to have the first three fields in the
   right order
   TODO need to escape stuff */
Octstr *mms_pdu_to_xml(MMS_PDU *pdu) {
	Octstr *data, *temp;
	
    data = octstr_create("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n");
    octstr_append(data, octstr_imm("<mms>\n"));

	switch (pdu->type) {

#define PDU(name, pdutype, docstring, fields, is_valid) \
	case name: { \
		struct name *p = &pdu->u.name; \
        octstr_append(data, octstr_format("    <x_mms_message_type>%ld</x_mms_message_type>\n", pdutype)); \
		fields \
	} break;
#define TYPE(fields, value) \
    octstr_append_char(data, 12); \
    octstr_append_char(data, value);
#define UINT(field, fieldnr, docstring) \
    if (p->field > 0) \
        octstr_append(data, octstr_format("    <" #field ">%d</" #field ">\n", p->field));
#define MMSVERSION(field, fieldnr, docstring) \
    if (p->field >= 0) \
        octstr_append(data, octstr_format("    <" #field ">%s</" #field ">\n", octstr_get_cstr(p->field)));
#define ULONG(field, fieldnr, docstring) \
    if (p->field >= 0) \
        octstr_append(data, octstr_format("    <" #field ">%ld</" #field ">\n", p->field)); 
#define ULONGABSREL(field, fieldnr, docstring) \
    if (p->field >= 0) { \
        octstr_append(data, octstr_format("    <" #field ">%ld</" #field ">\n", p->field)); \
         if (p->field ## _absrelind == MMS_TRUE_TOKEN) \
             octstr_append(data, octstr_imm("    <" #field "_absolute>true<" #field "_absolute\n>")); \
         else \
            octstr_append(data, octstr_imm("    <" #field "_absolute>false<" #field "_absolute\n>")); \
    }
#define ENCSTRVAL(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        octstr_append(data, octstr_format("    <" #field "_charset>%ld</" #field "_charset>\n", p->field ## _charset)); \
        if (p->field ## _charset == 0 || p->field ## _charset == 128) \
            octstr_append(data, octstr_format("    <" #field ">%s</" #field ">\n", octstr_get_cstr(p->field))); \
        else { \
            temp = octstr_duplicate(p->field); octstr_binary_to_base64(temp); \
            octstr_append(data, octstr_format("    <" #field " encoding=\"base64\">%s</" #field ">\n", octstr_get_cstr(temp))); \
            octstr_destroy(temp); \
        } \
    }
#define ENCSTRVALE(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        octstr_append(data, octstr_format("    <" #field "_charset>%ld</" #field "_charset>\n", p->field ## _charset)); \
        if (p->field ## _charset == 0 || p->field ## _charset == 128) \
            octstr_append(data, octstr_format("    <" #field ">%s</" #field ">\n", octstr_get_cstr(p->field))); \
        else { \
            temp = octstr_duplicate(p->field); octstr_binary_to_base64(temp); \
            octstr_append(data, octstr_format("    <" #field " encoding=\"base64\">%s</" #field ">\n", octstr_get_cstr(temp))); \
            octstr_destroy(temp); \
        } \
    }
#define OCTSTR(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        temp = octstr_duplicate(p->field); \
        simple_xml_escape(temp); \
        octstr_append(data, octstr_format("    <" #field ">%s</" #field ">\n", octstr_get_cstr(temp))); \
        octstr_destroy(temp); \
    }
#define OCTSTRE(field, fieldnr, docstring) \
    if (p->field != NULL) { \
        temp = octstr_duplicate(p->field); \
        simple_xml_escape(temp); \
        octstr_append(data, octstr_format("    <" #field ">%s</" #field ">\n", octstr_get_cstr(temp))); \
        octstr_destroy(temp); \
    }
#define REST(field, docstring) \
    if (p->field != NULL) { \
        temp = octstr_duplicate(p->field); octstr_binary_to_base64(temp); \
        octstr_append(data, octstr_format("    <" #field " encoding=\"base64\">%s</" #field ">\n", octstr_get_cstr(temp))); \
        octstr_destroy(temp); \
    }
#include "mms_pdu.def"
#undef REST
#undef ENCSTRVAL
#undef ENCSTRVALE
#undef ULONG
#undef ULONGABSREL
#undef OCTSTR
#undef OCTSTRE
#undef MMSVERSION
#undef UINT
#undef PDU
	default:
		panic(0, "Packing unknown MMS PDU type %ld", (long) pdu->type);
	}


    octstr_append(data, octstr_imm("</mms>\n"));
	return data;
}