help with socket programming in c


 
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# 8  
Old 04-06-2010
Then I would say you must change the data structures to use an array of structure which should also include the connection fd and use select() to handling multiple connections. select() will tell you which of connection is having data in their socket buffer.
Code:
struct conn {
  int fd;
  int svbuf_len;
  int clbuf_len;
  char srvbuf[1024];
  char cl_buf[1024];
  // put more thing if need.
};

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select.h(3HEAD) 						      Headers							   select.h(3HEAD)

NAME
select.h, select - select types SYNOPSIS
#include <sys/select.h> DESCRIPTION
The <sys/select.h> header defines the timeval structure, which includes the following members: time_t tv_sec /* seconds */ suseconds_t tv_usec /* microseconds */ The time_t and suseconds_t types are defined as described in <sys/types.h>. See types.h(3HEAD). The sigset_t type is defined as described in signal.h(3HEAD). The timespec structure is defined as described in <time.h>. See time.h(3HEAD). The <sys/select.h> header defines the fd_set type as a structure. The following is defined as a macro: FD_SETSIZE Maximum number of file descriptors in an fd_set structure. Inclusion of the <sys/select.h> header can make visible all symbols from the headers <signal.h>, <sys/time.h>, and <time.h>. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
select(3C), signal.h(3HEAD), time.h(3HEAD), types.h(3HEAD), attributes(5), standards(5) SunOS 5.10 10 Sep 2004 select.h(3HEAD)