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Winsock: How to send a struct?
October 28, 2002 12:13 PM
How do I get the send/recv functions to allow me to transfer an entire struct with Winsock?
Thx
[Piebert Entertainment] [Ask The All-Knowing Oracle A Question]------------------------------------------------------------GDSFUBY GameDev Society For UnBanning YodaTheCodaIf you want to see yoda unbanned then put this in your sig ------------------------------------------------------------DAIAGA Dave Astle is a God Association. To join, put this in your sig!Founder and High Priest of DAIAGA[edited by - YodaTheCoda on December 10, 2003 1:57:54 PM]
102
October 28, 2002 12:42 PM
send (char*)struct, sizeof(struct)-bytesyoudontneed
unsigned char buffer[sizeof(struct)]
recv buffer,bytespending
Then you can reason out how you go from there handling partial messages and multiple messages per packet.
Ben
IcarusIndie.com [ The Rabbit Hole | The Labyrinth | DevZone | Gang Wars | The Wall | Hosting | Tiberian Merchandise!!!! | GameShot ]
unsigned char buffer[sizeof(struct)]
recv buffer,bytespending
Then you can reason out how you go from there handling partial messages and multiple messages per packet.
Ben
IcarusIndie.com [ The Rabbit Hole | The Labyrinth | DevZone | Gang Wars | The Wall | Hosting | Tiberian Merchandise!!!! | GameShot ]
October 28, 2002 12:54 PM
quote:
Original post by KalvinB
send (char*)struct, sizeof(struct)-bytesyoudontneed
unsigned char buffer[sizeof(struct)]
recv buffer,bytespending
Then you can reason out how you go from there handling partial messages and multiple messages per packet.
Ben
IcarusIndie.com [ The Rabbit Hole | The Labyrinth | DevZone | Gang Wars | The Wall | Hosting | Tiberian Merchandise!!!! | GameShot ]
I get a typecasting error doing that though?
struct sendmsg{int hp;int mp;int str;};sendmsg msg;msg.hp=500;msg.mp=100;msg.str=10;ret = send(sClient, (char*)msg, sizeof(msg), 0); The error i get is:
C:\sockserver\main.cpp(150) : error C2440: ''type cast'' : cannot convert from ''struct sendmsg'' to ''char *''
Thx
[Piebert Entertainment] [Ask The All-Knowing Oracle A Question]------------------------------------------------------------GDSFUBY GameDev Society For UnBanning YodaTheCodaIf you want to see yoda unbanned then put this in your sig ------------------------------------------------------------DAIAGA Dave Astle is a God Association. To join, put this in your sig!Founder and High Priest of DAIAGA[edited by - YodaTheCoda on December 10, 2003 1:57:54 PM]
144
October 28, 2002 12:58 PM
ret = send(sClient, (char*)&msg, sizeof(msg), 0); Take a closer look at what you''re passing around. This is a basic, fundamental C/C++ programming concept that you haven''t grasped. Don''t walk before you can crawl.
---------------------http://www.stodge.net
October 28, 2002 01:02 PM
quote:
Original post by stodgeret = send(sClient, (char*)&msg, sizeof(msg), 0);
Take a closer look at what you''re passing around. This is a basic, fundamental C/C++ programming concept that you haven''t grasped. Don''t walk before you can crawl.
doh! ok thanks lol. I understand it, I just wasn''t thinking. I think my mind is just screwed up by thinking too hard over the last few days about WinSock.
Ok Great!
Thanks for the help.
Gotta love that.
[Piebert Entertainment] [Ask The All-Knowing Oracle A Question]------------------------------------------------------------GDSFUBY GameDev Society For UnBanning YodaTheCodaIf you want to see yoda unbanned then put this in your sig ------------------------------------------------------------DAIAGA Dave Astle is a God Association. To join, put this in your sig!Founder and High Priest of DAIAGA[edited by - YodaTheCoda on December 10, 2003 1:57:54 PM]
144
October 28, 2002 01:03 PM
We all have those days. 
[edited by - stodge on October 28, 2002 5:52:21 PM]
quote:
Original post by ktuluorionOriginal post by stodgeret = send(sClient, (char*)&msg, sizeof(msg), 0);
Take a closer look at what you're passing around. This is a basic, fundamental C/C++ programming concept that you haven't grasped. Don't walk before you can crawl.
[edited by - stodge on October 28, 2002 5:52:21 PM]
---------------------http://www.stodge.net
241
October 28, 2002 01:10 PM
struct sendmsg{int hp;int mp;int str;};
sendmsg msg;
int a;
char *s=(char*)&msg
try this
sendmsg msg;
int a;
char *s=(char*)&msg
try this
http://www.8ung.at/basiror/theironcross.html
October 28, 2002 01:12 PM
quote:
Original post by stodge
We all have those days.Original post by ktuluorionOriginal post by stodgeret = send(sClient, (char*)&msg, sizeof(msg), 0);
Take a closer look at what you''re passing around. This is a basic, fundamental C/C++ programming concept that you haven''t grasped. Don''t walk before you can crawl.
doh! ok thanks lol. I understand it, I just wasn''t thinking. I think my mind is just screwed up by thinking too hard over the last few days about WinSock.
Ok Great!
Thanks for the help.
Gotta love that.
OK wait.. only thing is.. I see how to typecast the struct to chars, but how do you turn the chars back into a struct?
Maybe this is a dumb question, but I don''t think I have ever run into a problem where I had to typecast a struct into an array of chars.
ret = recv(s, (char *)getmessage, sizeof(sendmsg), 0);
msg=(sendmsg)getmessage;
[Piebert Entertainment] [Ask The All-Knowing Oracle A Question]------------------------------------------------------------GDSFUBY GameDev Society For UnBanning YodaTheCodaIf you want to see yoda unbanned then put this in your sig ------------------------------------------------------------DAIAGA Dave Astle is a God Association. To join, put this in your sig!Founder and High Priest of DAIAGA[edited by - YodaTheCoda on December 10, 2003 1:57:54 PM]
October 28, 2002 01:16 PM
You know I feel like i''m going to have a problem here too.. because I need to have the recv function have an expected size, but i''m not going to have the exact size of the recieving structure on that end.
Hmm.
I could always have a send before that which indicates what the size is.
Hmm.
I could always have a send before that which indicates what the size is.
[Piebert Entertainment] [Ask The All-Knowing Oracle A Question]------------------------------------------------------------GDSFUBY GameDev Society For UnBanning YodaTheCodaIf you want to see yoda unbanned then put this in your sig ------------------------------------------------------------DAIAGA Dave Astle is a God Association. To join, put this in your sig!Founder and High Priest of DAIAGA[edited by - YodaTheCoda on December 10, 2003 1:57:54 PM]
241
October 28, 2002 01:16 PM
sendmsg msg;
msg.hp=111;
msg.mp=122;
msg.str=324234234;
char *sjz=(char*)&msg
printf("%s\n",sjz);
sendmsg *g;
g=(sendmsg*)sjz;
printf("%d %d %d",g->hp,g->mp,g->str);
thats how it works correct ^^^^
dudes
[edited by - Basiror on October 28, 2002 2:18:52 PM]
msg.hp=111;
msg.mp=122;
msg.str=324234234;
char *sjz=(char*)&msg
printf("%s\n",sjz);
sendmsg *g;
g=(sendmsg*)sjz;
printf("%d %d %d",g->hp,g->mp,g->str);
thats how it works correct ^^^^
dudes
[edited by - Basiror on October 28, 2002 2:18:52 PM]
http://www.8ung.at/basiror/theironcross.html
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