length of client and server structure

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hey,
this is a trivial question but I shall be really grateful if somebody answers this,

server_length = sizeof(struct sockaddr_in);//On client side

client_length = (int)sizeof(struct sockaddr_in); //On server side

I do know that the above statements return the length of the client and server respectively but I am having a hard time understanding as to why do we need these....:(

I would really appreciate your help...

Posted 11-Apr-13 1:58am

Aayman Khalid

Updated 11-Apr-13 1:59am

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KarstenK · Answer 1 · 2013-04-11T02:05:00

Solution 1

the size of a struct is often used as flag of the version of the struct. It is common use to add new members at the end of the struct.

check this sample

struct V1
{
  int h;
};

struct V2
{
  int h;
  int v;
};

Posted 11-Apr-13 2:05am

KarstenK