Re: UDP Broadcast
"'Bill Auerbach' bill-N8kN8kpsG2dWk0Htik3J/[email protected] [rabbit-semi]" <[email protected]> Sat, 03 Nov 2018 14:55:59 +0000
| Newsgroups | gmane.comp.hardware.rabbit-semiconductor |
|---|---|
| Message-ID | <em2e82835e-08f1-4c06-b154-d60878bca59a@bill-win7> |
--------=_MB7845B4E4-7953-4DCD-B286-5035C1C65EB6 Content-Type: text/plain; format=flowed; charset=utf-8 Content-Transfer-Encoding: quoted-printable You would have to include that as part of the UDP payload (or know from=20 other data contained in the datagram). The broadcast address is lost=20 when it's mapped to every IP address that gets targeted. Unless there's=20 a way I've not seen but I've done a lot of broadcast and=20 subnet-broadcast to devices and I needed to embed in the payload how it=20 was sent. I'd like to know this as well if it exists. :-) ------ Original Message ------ From: "Steve Trigero seecwriter-/[email protected] [rabbit-semi]"=20 <[email protected]> To: "[email protected]" <[email protected]> Sent: 11/2/2018 5:21:12 PM Subject: [rabbit-semi] UDP Broadcast > > >In my R6k application I use UDP protocol. I open several socket to=20 >received datagrams from any IP. >Is there a way to determine if a datagram was received as a Broadcast=20 >datagram? Neither udp_recvfrom >nor udp_recv seem to provide that information. > --------=_MB7845B4E4-7953-4DCD-B286-5035C1C65EB6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/htm= l4/strict.dtd"> <html> <head> </head> =20 <body style=3D"background-color: #fff;"> <span style=3D"display:none"> </span> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id=3D"ygrp-mlmsg" style=3D"position:relative;"> <div id=3D"ygrp-msg" style=3D"z-index: 1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id=3D"ygrp-text" > =20=20=20=20=20=20 =20=20=20=20=20=20 <p> =20 <div>You would have to include that as part of the UDP payload (or know fro= m other data contained in the datagram). =C2=A0The broadcast address is los= t when it's mapped to every IP address that gets targeted. =C2=A0Unless the= re's a way I've not seen but I've done a lot of broadcast and subnet-broadc= ast to devices and I needed to embed in the payload how it was sent. =C2=A0= I'd like to know this as well if it exists. :-)</div> <div><br></div> <div>------ Original Message ------</div> <div>From: "Steve Trigero seecwriter-/[email protected] [rabbit-semi]" <<a href= =3D"mailto:[email protected]">[email protected]</a>>= </div> <div>To: "[email protected]" <<a href=3D"mailto:rabbit-semi@ya= hoogroups.com">[email protected]</a>></div> <div>Sent: 11/2/2018 5:21:12 PM</div> <div>Subject: [rabbit-semi] UDP Broadcast</div><div><br></div> <div id=3D"x6daebc7e0649454" style=3D"background-color: #fff;"><blockquote = cite=3D"159774395.21441129.1541193672344-sAHhhX/[email protected]" type=3D"cite" clas= s=3D"cite2"> =C2=A0 <div id=3D"ygrp-text"> =20=20=20=20=20=20 =20=20=20=20=20=20 <p></p><div style=3D"color:#000;background-color:#fff;font-family:tim= es new roman, new york, times, serif;font-size:16px;"><div id=3D"yui_3_16_0= _ym19_1_1541169934064_6446"> In my R6k application I use UDP protocol. I o= pen several socket to received datagrams from any IP.</div><div id=3D"yui_3= _16_0_ym19_1_1541169934064_6445" dir=3D"ltr">Is there a way to determine if= a datagram was received as=C2=A0a Broadcast datagram?=C2=A0=C2=A0Neither u= dp_recvfrom</div><div id=3D"yui_3_16_0_ym19_1_1541169934064_6459" dir=3D"lt= r">nor udp_recv seem to provide that information.=C2=A0</div></div> </div> =20=20=20=20=20 =20=20=20=20 </blockquote></div> <!-- end group email --> </p> </div> =20=20=20=20=20 <!--~-|**|PrettyHtmlStart|**|-~--> <div style=3D"color: #fff; height: 0;">__._,_.___</div> =20=20=20=20=20=20=20=20=20=20 =20=20 =20 =20=20=20=20 <div style=3D"clear:both"> </div> <div id=3D"fromDMARC" style=3D"margin-top: 10px;"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; background= -color:#E3E3E3;"> Posted by: "Bill Auerbach" <bill-N8kN8kpsG2dWk0Htik3J/[email protected]> = <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; background-colo= r:#E3E3E3;"> </div> <div style=3D"clear:both"> </div> <table cellspacing=3D4px style=3D"margin-top: 10px; margin-bottom: 10px= ; color: #2D50FD;"> <tbody> <tr> <td style=3D"font-size: 12px; font-family: arial; font-weight: bo= ld; padding: 7px 5px 5px;" > <a style=3D"text-decoration: none; color: #2D50FD= " href=3D"https://groups.yahoo.com/neo/groups/rabbit-semi/conversations/mes= sages/42501;_ylc=3DX3oDMTJxc2VvNHBzBF9TAzk3MzU5NzE0BGdycElkAzIzMDczMTYEZ3Jw= c3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQyNTAxBHNlYwNmdHIEc2xrA3JwbHkEc3RpbWUDMTU0MTI= 1Njk2NA--?act=3Dreply&messageNum=3D42501">Reply via web post</a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;" > <a href=3D"mailto:bill-N8kN8kpsG2dWk0Htik3J/[email protected]?subject=3DRe%3A%20%5Brabbit= -semi%5D%20UDP%20Broadcast" style=3D"text-decoration: none; color: #2D50FD;= "> Reply to sender </a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;"> <a href=3D"mailto:[email protected]?subject=3DRe%3A%2= 0%5Brabbit-semi%5D%20UDP%20Broadcast" style=3D"text-decoration: none; color= : #2D50FD"> Reply to group </a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;" > <a href=3D"https://groups.yahoo.com/neo/groups/rabbit-semi/conv= ersations/newtopic;_ylc=3DX3oDMTJldTdwdmdjBF9TAzk3MzU5NzE0BGdycElkAzIzMDczM= TYEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTU0MTI1Njk2NA--= " style=3D"text-decoration: none; color: #2D50FD">Start a New Topic</a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;color: #2D50FD;" > <a href=3D"https://groups.yahoo.com/neo/groups/= rabbit-semi/conversations/topics/42500;_ylc=3DX3oDMTM2NHZyaDYxBF9TAzk3MzU5N= zE0BGdycElkAzIzMDczMTYEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQyNTAxBHNlYwNmdHIE= c2xrA3Z0cGMEc3RpbWUDMTU0MTI1Njk2NAR0cGNJZAM0MjUwMA--" style=3D"text-decorat= ion: none; color: #2D50FD;">Messages in this topic</a> (2) </td> </tr> </tbody> </table> =20=20=20=20=20=20=20=20 <div id=3D"megaphoneModule"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; backgr= ound-color:#E3E3E3;"> <div> <div class=3D"stream" style=3D"margin-bottom:10px;"> <div style=3D"background-color:white;"> <div class=3D"sn-img" style=3D"display:inline;"><img name=3D"tn= _file" style=3D"padding:0px 10px;vertical-align:top;margin-top:5px;" src=3D= "https://s.yimg.com/ru/static/images/yg/img/megaphone/1464031581_phpFA8bON"= height=3D"82" width=3D"82"></div> <div class=3D"mod-txt" style=3D"display:inline-block;"> <a rel=3D"nofollow" name=3D"sub_url" target=3D"_blank" href= =3D"https://yho.com/1wwmgg" style=3D"color:#0000FF;display:block;margin-lef= t:5px;text-decoration:none;"><span style=3D"font-size:15px;">Have you tried= the highest rated email app?</span></a> <div style=3D"max-width:530px;padding:2px 5px;">With 4.5 st= ars in iTunes, the Yahoo Mail app is the highest rated email app on the mar= ket. 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