How to get ip address from sock structure in c?

by

OK assuming you are using IPV4 then do the following:

struct sockaddr_in* pV4Addr = (struct sockaddr_in*)&client_addr;
struct in_addr ipAddr = pV4Addr->sin_addr;

If you then want the ip address as a string then do the following:

char str[INET_ADDRSTRLEN];
inet_ntop( AF_INET, &ipAddr, str, INET_ADDRSTRLEN );

IPV6 is pretty easy as well …

struct sockaddr_in6* pV6Addr = (struct sockaddr_in6*)&client_addr;
struct in6_addr ipAddr       = pV6Addr->sin6_addr;

and getting a string is almost identical to IPV4

char str[INET6_ADDRSTRLEN];
inet_ntop( AF_INET6, &ipAddr, str, INET6_ADDRSTRLEN );

More Related Contents:

  1. Connection refused – tcp socket in linux [closed]
  2. Are parallel calls to send/recv on the same socket valid?
  3. Passing a structure through Sockets in C
  4. Differ between header and content of http server response (sockets)
  5. close vs shutdown socket?
  6. How to set socket timeout in C when making multiple connections?
  7. Understanding INADDR_ANY for socket programming
  8. Why do we cast sockaddr_in to sockaddr when calling bind()?
  9. How to make an HTTP get request in C without libcurl?
  10. Linux: is there a read or recv from socket with timeout?
  11. How to signal select() to return immediately?
  12. Why changing value of SO_RCVBUF doesn’t work?
  13. Where to find the complete definition of off_t type?
  14. How do I use setsockopt(SO_REUSEADDR)?
  15. How large should my recv buffer be when calling recv in the socket library
  16. Cannot assign requested address – possible causes?
  17. Why is it assumed that send may return with less than requested data transmitted on a blocking socket?
  18. How do I find the current machine’s full hostname in C (hostname and domain information)?
  19. how to bind raw socket to specific interface
  20. How to use SO_KEEPALIVE option properly to detect that the client at the other end is down?
  21. Strange RAW Socket on Mac OS X
  22. What can cause a “Resource temporarily unavailable” on sock send() command
  23. Getting IPV4 address from a sockaddr structure
  24. Program received signal SIGPIPE, Broken pipe
  25. Integer to IP Address – C
  26. Understanding htonl() and ntohl()
  27. Bind error while recreating socket
  28. passing a struct over TCP (SOCK_STREAM) socket in C
  29. Using select() for non-blocking sockets
  30. What is the difference between AF_INET and PF_INET in socket programming?

Leave a Comment