static void
dissect_UDPExtStatus(tvbuff_t *tvb, proto_tree *adwin_tree)
{
const gchar *processor_type, *system_type;
if (! adwin_tree)
return;
proto_tree_add_item(adwin_tree, hf_adwin_config_mac, tvb, 0, 6, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 6, 2, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_pattern, tvb, 8, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_version, tvb, 12, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_description, tvb, 16, 16, ENC_ASCII|ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_timerresets, tvb, 32, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_socketshutdowns, tvb, 36, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_disk_free, tvb, 40, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_disk_size, tvb, 44, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_date, tvb, 48, 8, ENC_ASCII|ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_revision, tvb, 56, 8, ENC_ASCII|ENC_NA);
/* add the processor type raw values to the tree, to allow filtering */
proto_tree_add_item(adwin_tree, hf_adwin_config_processor_type, tvb, 64, 2, ENC_ASCII|ENC_NA);
/* add the processor type as a pretty printed string */
processor_type = tvb_get_string_enc(wmem_packet_scope(), tvb, 64, 2, ENC_ASCII|ENC_NA);
processor_type = str_to_str(processor_type, processor_type_mapping, "Unknown (%s)");
proto_tree_add_text(adwin_tree, tvb, 64, 2, "Processor Type: %s", processor_type);
/* add system type as raw value and pretty printed string */
proto_tree_add_item(adwin_tree, hf_adwin_config_system_type, tvb, 66, 2, ENC_ASCII|ENC_NA);
system_type = tvb_get_string_enc(wmem_packet_scope(), tvb, 66, 2, ENC_ASCII|ENC_NA);
system_type = str_to_str(system_type, system_type_mapping, "Unknown (%s)");
proto_tree_add_text(adwin_tree, tvb, 66, 2, "System Type: %s", system_type);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 68, 364, ENC_NA);
}
static void
dissect_UDPExtStatus(tvbuff_t *tvb, proto_tree *adwin_tree)
{
const gchar *processor_type, *system_type;
if (! adwin_tree)
return;
ADWIN_ADD_BE(adwin_tree, mac, 0, 6);
ADWIN_ADD_LE(adwin_tree, unused, 6, 2);
ADWIN_ADD_BE(adwin_tree, pattern, 8, 4);
ADWIN_ADD_BE(adwin_tree, version, 12, 4);
ADWIN_ADD_LE(adwin_tree, description, 16, 16);
ADWIN_ADD_BE(adwin_tree, timerresets, 32, 4);
ADWIN_ADD_BE(adwin_tree, socketshutdowns, 36, 4);
ADWIN_ADD_BE(adwin_tree, disk_free, 40, 4);
ADWIN_ADD_BE(adwin_tree, disk_size, 44, 4);
ADWIN_ADD_LE(adwin_tree, date, 48, 8);
ADWIN_ADD_LE(adwin_tree, revision, 56, 8);
/* add the processor type raw values to the tree, to allow filtering */
ADWIN_ADD_LE(adwin_tree, processor_type, 64, 2);
/* add the processor type as a pretty printed string */
processor_type = tvb_get_ephemeral_string(tvb, 64, 2);
processor_type = str_to_str(processor_type, processor_type_mapping, "Unknown (%s)");
proto_tree_add_text(adwin_tree, tvb, 64, 2, "Processor Type: %s", processor_type);
/* add system type as raw value and pretty printed string */
ADWIN_ADD_LE(adwin_tree, system_type, 66, 2);
system_type = tvb_get_ephemeral_string(tvb, 66, 2);
system_type = str_to_str(system_type, system_type_mapping, "Unknown (%s)");
proto_tree_add_text(adwin_tree, tvb, 66, 2, "System Type: %s", system_type);
ADWIN_ADD_LE(adwin_tree, unused, 68,364);
}
static bool test_str_to_str(void){
char dst[3];
// normal
memset( dst, 'x', 3 );
test( str_to_str( dst, 3, "12" ) );
test( 0 == memcmp( dst, "12\x00", 3 ) );
// dst size NOT enought
memset( dst, 'x', 3 );
test( !str_to_str( dst, 3, "123" ) );
test( 0 == memcmp( dst, "12\x00", 3 ) );
// dst size is 1
memset( dst, 'x', 3 );
test( !str_to_str( dst, 1, "12" ) );
test( 0 == memcmp( dst, "\x00xx", 3 ) );
// src len is 0
memset( dst, 'x', 3 );
test( str_to_str( dst, 3, "" ) );
test( 0 == memcmp( dst, "\x00xx", 3 ) );
return true;
}
static bool test_append_str(void){
char dst[10];
const int dst_size = sizeof(dst);
// 正常append
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( append_str( dst, dst_size, "123" ) );
test( 0 == memcmp( dst, "ab123\x00xxxx", 10 ) );
// 边界条件，buff长度正好容纳
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( append_str( dst, 6, "123" ) );
test( 0 == memcmp( dst, "ab123\x00xxxx", 10 ) );
// 边界条件， buff长度比完整拷贝少一个字节
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( !append_str( dst, 5, "123" ) );
test( 0 == memcmp( dst, "ab12\x00xxxxx", 10 ) );
// 边界条件，buff长度比dst字符串长度小
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( !append_str( dst, 1, "123" ) );
// 'b' = 0x62
test( 0 == memcmp( dst, "\x00\x62\x00xxxxxxx", 10 ) );
// 边界条件，buff长度即dst字符串长度
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( !append_str( dst, 2, "123" ) );
test( 0 == memcmp( dst, "a\x00\x00xxxxxxx", 10 ) );
// 边界条件，buff长度即dst字符串长度+1
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( !append_str( dst, 3, "123" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
// 特殊条件，src字符串为空
memset( dst, 'x', dst_size );
test( str_to_str( dst, dst_size, "ab" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
test( append_str( dst, 5, "" ) );
test( 0 == memcmp( dst, "ab\x00xxxxxxx", 10 ) );
memset( dst, 'x', dst_size );
test( str_to_str( dst, 3, "" ) );
test( 0 == memcmp( dst, "\x00xx", 3 ) );
return true;
}
static void
dissect_UDPMessage(tvbuff_t *tvb, proto_tree *adwin_tree)
{
const gchar *processor_type, *system_type;
if (! adwin_tree)
return;
ADWIN_ADD_LE(adwin_tree, command, 0, 4);
ADWIN_ADD_LE(adwin_tree, version, 4, 4);
ADWIN_ADD_LE(adwin_tree, mac, 8, 6);
ADWIN_ADD_LE(adwin_tree, unused, 14, 2);
ADWIN_ADD_LE(adwin_tree, server_ip, 16, 4);
ADWIN_ADD_LE(adwin_tree, unused, 20, 4);
ADWIN_ADD_LE(adwin_tree, netmask, 24, 4);
ADWIN_ADD_LE(adwin_tree, unused, 28, 4);
ADWIN_ADD_LE(adwin_tree, gateway, 32, 4);
ADWIN_ADD_LE(adwin_tree, unused, 36, 4);
ADWIN_ADD_LE(adwin_tree, dhcp, 40, 4);
ADWIN_ADD_LE(adwin_tree, port32, 44, 4);
ADWIN_ADD_LE(adwin_tree, password, 48, 10);
ADWIN_ADD_LE(adwin_tree, bootloader, 58, 1);
ADWIN_ADD_LE(adwin_tree, unused, 59, 5);
ADWIN_ADD_LE(adwin_tree, description, 64, 16);
ADWIN_ADD_LE(adwin_tree, date, 80, 8);
ADWIN_ADD_LE(adwin_tree, revision, 88, 8);
/* add the processor type raw values to the tree, to allow filtering */
ADWIN_ADD_LE(adwin_tree, processor_type, 96, 2);
/* add the processor type as a pretty printed string */
processor_type = tvb_get_ephemeral_string(tvb, 96, 2);
processor_type = str_to_str(processor_type, processor_type_mapping, "Unknown");
proto_tree_add_text(adwin_tree, tvb, 96, 2, "Processor Type: %s", processor_type);
/* add system type as raw value and pretty printed string */
ADWIN_ADD_LE(adwin_tree, system_type, 98, 2);
system_type = tvb_get_ephemeral_string(tvb, 98, 2);
system_type = str_to_str(system_type, system_type_mapping, "Unknown");
proto_tree_add_text(adwin_tree, tvb, 98, 2, "System Type: %s", system_type);
}
static void
dissect_UDPMessage(tvbuff_t *tvb, proto_tree *adwin_tree)
{
const gchar *processor_type, *system_type;
if (! adwin_tree)
return;
proto_tree_add_item(adwin_tree, hf_adwin_config_command, tvb, 0, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_version, tvb, 4, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_mac, tvb, 8, 6, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 14, 2, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_server_ip, tvb, 16, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 20, 4, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_netmask, tvb, 24, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 28, 4, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_gateway, tvb, 32, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 36, 4, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_dhcp, tvb, 40, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_port32, tvb, 44, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_password, tvb, 48, 10, ENC_ASCII|ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_bootloader, tvb, 58, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(adwin_tree, hf_adwin_config_unused, tvb, 59, 5, ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_description, tvb, 64, 16, ENC_ASCII|ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_date, tvb, 80, 8, ENC_ASCII|ENC_NA);
proto_tree_add_item(adwin_tree, hf_adwin_config_revision, tvb, 88, 8, ENC_ASCII|ENC_NA);
/* add the processor type raw values to the tree, to allow filtering */
proto_tree_add_item(adwin_tree, hf_adwin_config_processor_type, tvb, 96, 2, ENC_ASCII|ENC_NA);
/* add the processor type as a pretty printed string */
processor_type = tvb_get_string_enc(wmem_packet_scope(), tvb, 96, 2, ENC_ASCII|ENC_NA);
processor_type = str_to_str(processor_type, processor_type_mapping, "Unknown");
proto_tree_add_text(adwin_tree, tvb, 96, 2, "Processor Type: %s", processor_type);
/* add system type as raw value and pretty printed string */
proto_tree_add_item(adwin_tree, hf_adwin_config_system_type, tvb, 98, 2, ENC_ASCII|ENC_NA);
system_type = tvb_get_string_enc(wmem_packet_scope(), tvb, 98, 2, ENC_ASCII|ENC_NA);
system_type = str_to_str(system_type, system_type_mapping, "Unknown");
proto_tree_add_text(adwin_tree, tvb, 98, 2, "System Type: %s", system_type);
}
// dst中原为字符串，本函数尽量将src append在dst尾部，并判断append是否成功。
// 保证操作不会超过dst_size，而且，一定会在dst后添加'\0'
// return: 是否src完全append进dst中
bool append_str( char *dst, int dst_size, const char* src ){
const int dst_len = strlen(dst);
const int src_len = strlen(src);
char* const p = dst + dst_len; // 指向要拷贝的起始地址
const int buff_len_for_copy = dst_size - dst_len;
uverify( NULL != dst );
uverify( NULL != src );
uverify( 0 != dst_size );
if( (dst_len+1) > dst_size ){
// 如果dst字符串超过了缓冲区长度，认为系统发生错误，
// 按照缓冲区长度值进行截断。
dst[dst_size-1] = '\0';
return false;
}
str_to_str( p, buff_len_for_copy, src );
return (dst_len + src_len) == strlen(dst);
}
static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg)
{
char *str;
switch (arg->type) {
case FILTER_ARG_BOOLEAN:
str = malloc_or_die(6);
if (arg->boolean.value)
strcpy(str, "TRUE");
else
strcpy(str, "FALSE");
return str;
case FILTER_ARG_OP:
return op_to_str(filter, arg);
case FILTER_ARG_NUM:
return num_to_str(filter, arg);
case FILTER_ARG_STR:
return str_to_str(filter, arg);
case FILTER_ARG_VALUE:
return val_to_str(filter, arg);
case FILTER_ARG_FIELD:
return field_to_str(filter, arg);
case FILTER_ARG_EXP:
return exp_to_str(filter, arg);
default:
/* ?? */
return NULL;
}
}
/* ---------------------------------------------- */
static void
dissect_fix_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *fix_tree;
int pdu_len;
int offset = 0;
int field_offset, ctrla_offset;
int tag_value;
char *value;
char *tag_str;
fix_parameter *tag;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FIX");
col_clear(pinfo->cinfo, COL_INFO);
/* get at least the fix version: 8=FIX.x.x */
if (fix_marker(tvb, 0) != 0) {
/* not a fix packet start but it's a fix packet */
col_set_str(pinfo->cinfo, COL_INFO, "[FIX continuation]");
ti = proto_tree_add_item(tree, proto_fix, tvb, 0, -1, ENC_NA);
fix_tree = proto_item_add_subtree(ti, ett_fix);
proto_tree_add_item(fix_tree, hf_fix_data, tvb, 0, -1, ENC_NA);
return;
}
pdu_len = tvb_reported_length(tvb);
ti = proto_tree_add_item(tree, proto_fix, tvb, 0, -1, ENC_NA);
fix_tree = proto_item_add_subtree(ti, ett_fix);
/* begin string */
ctrla_offset = tvb_find_guint8(tvb, offset, -1, 0x01);
if (ctrla_offset == -1) {
return;
}
offset = ctrla_offset + 1;
/* msg length */
ctrla_offset = tvb_find_guint8(tvb, offset, -1, 0x01);
if (ctrla_offset == -1) {
return;
}
offset = ctrla_offset + 1;
/* msg type */
if (!(tag = fix_param(tvb, offset)) || tag->value_len < 1) {
return;
}
if (check_col(pinfo->cinfo, COL_INFO)) {
const char *msg_type;
value = tvb_get_ephemeral_string(tvb, tag->value_offset, tag->value_len);
msg_type = str_to_str(value, messages_val, "FIX Message (%s)");
col_add_str(pinfo->cinfo, COL_INFO, msg_type);
}
/* In the interest of speed, if "tree" is NULL, don't do any work not
* necessary to generate protocol tree items.
*/
field_offset = 0;
while(field_offset < pdu_len && (tag = fix_param(tvb, field_offset)) ) {
int i, found;
if (tag->tag_len < 1) {
field_offset = tag->ctrla_offset + 1;
continue;
}
tag_str = tvb_get_ephemeral_string(tvb, field_offset, tag->tag_len);
tag_value = atoi(tag_str);
if (tag->value_len < 1) {
proto_tree *field_tree;
/* XXX - put an error indication here. It's too late
to return FALSE; we've already started dissecting,
and if a heuristic dissector starts dissecting
(either updating the columns or creating a protocol
tree) and then gives up, it leaves crud behind that
messes up other dissectors that might process the
packet. */
ti = proto_tree_add_text(fix_tree, tvb, field_offset, tag->field_len, "%i: <missing value>", tag_value);
field_tree = proto_item_add_subtree(ti, ett_badfield);
proto_tree_add_uint(field_tree, hf_fix_field_tag, tvb, field_offset, tag->tag_len, tag_value);
field_offset = tag->ctrla_offset + 1;
continue;
}
/* fix_fields array is sorted by tag_value */
found = 0;
if ((i = tag_search(tag_value)) >= 0) {
found = 1;
}
value = tvb_get_ephemeral_string(tvb, tag->value_offset, tag->value_len);
if (found) {
if (fix_fields[i].table) {
if (tree) {
switch (fix_fields[i].type) {
case 1: /* strings */
proto_tree_add_string_format_value(fix_tree, fix_fields[i].hf_id, tvb, field_offset, tag->field_len, value,
"%s (%s)", value, str_to_str(value, fix_fields[i].table, "unknown %s"));
break;
case 2: /* char */
proto_tree_add_string_format_value(fix_tree, fix_fields[i].hf_id, tvb, field_offset, tag->field_len, value,
"%s (%s)", value, val_to_str(*value, fix_fields[i].table, "unknown %d"));
break;
default:
proto_tree_add_string_format_value(fix_tree, fix_fields[i].hf_id, tvb, field_offset, tag->field_len, value,
"%s (%s)", value, val_to_str(atoi(value), fix_fields[i].table, "unknown %d"));
break;
}
}
}
else {
proto_item *item;
/* checksum */
switch(tag_value) {
case 10:
{
proto_tree *checksum_tree;
guint8 sum = 0;
const guint8 *data = tvb_get_ptr(tvb, 0, field_offset);
gboolean sum_ok;
int j;
for (j = 0; j < field_offset; j++, data++) {
sum += *data;
}
sum_ok = (atoi(value) == sum);
if (sum_ok) {
item = proto_tree_add_string_format_value(fix_tree, fix_fields[i].hf_id, tvb, field_offset, tag->field_len,
value, "%s [correct]", value);
}
else {
item = proto_tree_add_string_format_value(fix_tree, fix_fields[i].hf_id, tvb, field_offset, tag->field_len,
value, "%s [incorrect should be %d]", value, sum);
}
checksum_tree = proto_item_add_subtree(item, ett_checksum);
item = proto_tree_add_boolean(checksum_tree, hf_fix_checksum_good, tvb, field_offset, tag->field_len, sum_ok);
PROTO_ITEM_SET_GENERATED(item);
item = proto_tree_add_boolean(checksum_tree, hf_fix_checksum_bad, tvb, field_offset, tag->field_len, !sum_ok);
PROTO_ITEM_SET_GENERATED(item);
if (!sum_ok)
expert_add_info_format(pinfo, item, PI_CHECKSUM, PI_ERROR, "Bad checksum");
}
break;
default:
proto_tree_add_string(fix_tree, fix_fields[i].hf_id, tvb, field_offset, tag->field_len, value);
break;
}
}
}
else if (tree) {
proto_tree *field_tree;
/* XXX - it could be -1 if the tag isn't a number */
ti = proto_tree_add_text(fix_tree, tvb, field_offset, tag->field_len, "%i: %s", tag_value, value);
field_tree = proto_item_add_subtree(ti, ett_unknow);
proto_tree_add_uint(field_tree, hf_fix_field_tag, tvb, field_offset, tag->tag_len, tag_value);
proto_tree_add_item(field_tree, hf_fix_field_value, tvb, tag->value_offset, tag->value_len, ENC_ASCII|ENC_NA);
}
field_offset = tag->ctrla_offset + 1;
tag_str = NULL;
}
return;
}