Wireshark mailing list archives
Re: getting the time
From: philippe alarcon <philippe.alarcon () live fr>
Date: Thu, 21 Jan 2010 22:06:32 +0100
Hello Brian, May be you could implement something like the following : static gint hf_time = 0; /* Protocol fields description */ static hf_register_info hf[] = { ... { &hf_time, { "Date & time ", "melodhy.time", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }}, ... }; /* Add time value in the tree. Displayed as date + time */ d_d.val_time = tvb_get_ntohl( tvb, d_d.val_data_offset ); proto_tree_add_string_format_value( melodhy_tree, hf_time, tvb, d_d.val_data_offset, L_UINT32, "%s", abs_time_secs_to_str((time_t)d_d.val_time, FALSE) ); d_d is a structure that I use to memorise some variables. You have to replace d_d.val_data_offset by your offset, and to add the field description in your hf structure. Philippe
Date: Thu, 21 Jan 2010 14:59:01 -0500 From: oleksab () darkcornersoftware com To: wireshark-dev () wireshark org Subject: Re: [Wireshark-dev] getting the time Guy I am not sure I follow you. Basically all I do is count packets based on what I know is in the packet. Here is the whole packet that I am dissecting: (See below) So when I get to Time.. I check for if ((fieldsAvail & 2) != 0) Then I look at the pointer (which will point me to the right set of bytes). But how I start the initial counting process is I do the following: guint8 * ptr = (guint8*) tvb->real_data; Actually..... maybe you can see your answer better in the code. I have attached the packet-helen.c file. Any help on how I can get and format the time is greatly appreciated. Thanks, Brian Field Size Notes Meaning Fields Available 1 Each bit of this byte indicates that a particular field is available in this message. See table below. Status 1/0 GPS status. 0 = Good, 1 = No Fix, 2 = Bad GPS Read Time 8/0 GPS Time of the transmitting system. This may be different than the system time. Longitude 4/0 Longitude in decimal degrees (float) Latitude 4/0 Latitude in decimal degrees (float) Altitude 4/0 Altitude in decimal meters (float) Bearing 4/0 Bearing in decimal degrees from north (float) Speed 4/0 Speed in decimal m/s (float) Number of Satellites 1/0 Number of satellites current fix is based on *Note:* Check *Fields Available* to determine if each field is present. For floating point fields, the floating point number is written in network byte order as if it were a four byte integer. Bit Mask Field Referenced 1 Status 2 Time 4 Longitude 8 Latitude 16 Altitude 32 Bearing 64 Speed 128 Number of Satellites Guy Harris wrote:On Jan 21, 2010, at 11:25 AM, Brian Oleksa wrote:It is a pointer into the data that I have constructed based on the data in the packet.So what do you have to do to the raw data in the packet to construct that buffer? ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
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Current thread:
- Re: getting the time, (continued)
- Re: getting the time Guy Harris (Jan 21)
- Re: getting the time Brian Oleksa (Jan 21)
- Re: getting the time Guy Harris (Jan 21)
- string manipulation Brian Oleksa (Jan 25)
- Re: string manipulation Guy Harris (Jan 25)
- Re: string manipulation Gerald Combs (Jan 25)
- Re: string manipulation Guy Harris (Jan 25)
- Re: string manipulation Brian Oleksa (Jan 25)
- Re: string manipulation Guy Harris (Jan 25)
- Re: string manipulation Anders Broman (Jan 25)
- Re: getting the time philippe alarcon (Jan 21)
- Re: getting the time Guy Harris (Jan 21)
- Re: getting the time Guy Harris (Jan 21)
- Re: getting the time philippe alarcon (Jan 21)
- Re: getting the time Guy Harris (Jan 21)