How can i use multiple ethernet card for data transfer in my program( in C language)?
I have two ethernet card(NIC)im my computer .Their
characteristics are:
name:rl0
ip:128.128.64.235
netmask:255.255.0.0
broadcast:128.128.255.255
name:rl1
ip:128.128.65.235
netmask:255.255.0.0
broadcast:128.128.255.255
Both of them is up when i use ifconfig command.
I want develop a program that can use rl0 and rl1 for
data communication.My code is similar as flow:
main(){
...
for(i=0;i3,i++){
sd[i]=socket(...);//create DGRAM sockets
if (sd[i]==-1) return -1;
}
bind(sd[0],...);//bind sd0 to ip address of rl0
bind(sd[1],...);//bind sd1 to ip address of rl0
bind(sd[2],...);//bind sd2 to ip address of rl1
bind(sd[3],...);//bind sd3 to ip address of rl1
sendto(sd[0],...);//send form rl0 to remout host1
sendto(sd[2],...);//send from rl1 to remout host2
recvfrom(sd[1],...);//receive in rl0
recvfrom(sd[3],...);//receive in rl1
return 1;
}
In the first time when i executed my program all data
sent form rl0 ,in other word packets of rl1 and
packets of rl0 were sent by rl0;
So i use the route command as flow:
#route add [remout host2]-interface rl1
In this case data of rl1 weren't sent by rl0 but
rl1 didn't send data too.
please guide me .Thanks.
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How can i use multiple ethernet card for data transfer in my program( in C language)?
I have 2 ethernet card {rl0 with inet 128.128.64.235
and rl1 with inet128.128.65.235).I wrote a program
that creates DGREAM sockets and bind them into valid
addresses then sending packets and receiving their
acks from another program.My code operates as below:
main(){
sd1=socket(...);
sd2=socket(...);
rd1=socket(...);
rd2=socket(...);
bind(..sd1.);/*sd1 bind in 128.128.64.235 for sending
data*/
bind(..sd2.);/*sd2 bind in 128.128.65.235 for sending
data*/
bind(..rd1.);/*rd1 bind in 128.128.64.235 for
receiving data*/
bind(..rd2.);/*rd2 bind in 128.128.65.235 for
receiving data*/
sendto(..sd1..);
sendto(..sd2..);
recvfrom(..rd1..);
recvfrom(..rd2..);
...
}
As you see above i wanty send data from rl0 and rl1
but when i execute my code data only send from rl0 and
ther is not any data for outgoing from rl1.
please guide me what i must do?
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How can i use multiple ethernet card for data transfer?
I have two ethernet interface that installed with varient ips(rl0 , rl1) .I want send data from one ofthem that i like but data sent to outside of my computer from rl0. I bind ip address of rl1 and use sendto function in my program but data go out from rl0 to the remout address.please guide me. Thanks. __ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.com/ To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
How can i use multiple ethernet card for data transfer?
I have two ethernet card(lan card)in my system. they have varient IPs.My OS(FreeBSD 4.4) known them as rl0 ,rl1. I want send data from the card that i like but data only sent from rl0. In my program i act as below: ... bind();//bind in rl1 sendto();//send from a socket that bind at rl1 ... but my packets are sent from the rl0. Note: I use DGRAM socket for my program. please guide me for this problem. __ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.com/ To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
how can i use two child for sending and receiving data with minimum delay?
Hello
I am Alireza .I develop a program for sending and
receiving data via two child as below:
main(){//parent
if(!fork()){
sendto(sd1,...);
recvfrom(rd1,...);
exit(0);
}
if(!fork()){
sendto(sd2,...);
recvfrom(rd2,...);
exit(0);
}
while(waitpid(-1,NULL,WUNTRACED));//wait for childs
}
In above solution time of waiting for childs is
about milisecond but when i wrote program without any
child (as below),program execution time is about
microsecond.
main(){
sendto(sd1,...);
recvfrom(rd1,...);
exit(0);
sendto(sd2,...);
recvfrom(rd2,...);
}
Note :sd1,rd1,sd2,rd2 are DGRAM sockets;
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How can i use the socket that created by a child in parent?
I create a stream socket in a child process and i want
to use it outside of child.
main(){
int sd;
int fd[2];
char buf[20];
pipe(fd));
if(!fork()){
sd=socket();
...
...
write(fd[1]);//write sd to the pipe
}
read(fd[0],...)//read sd from pipe
send(sd,);//error is occured in this line at
executing the program
...
}
I understand that the descriptors don't send via pipe
to the outside of childs so guide me please.
///Alireza
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Is there any way that i can listening ,accepting and handeling two or more sockets at the same time?
I want to accepting and handeling(sending to and receiving from) two sockets(STREAM socket)at the same time please guide me and send me a sample code written in c++ about this title for me. Thanks for your attention. __ Do you Yahoo!? Faith Hill - Exclusive Performances, Videos More http://faith.yahoo.com To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
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