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sockets: add hooks to implement additional socket options

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LWIP_HOOK_SOCKETS_SETSOCKOPT() and LWIP_HOOK_SOCKETS_GETSOCKOPT()
are introduced to implement additional socket options. The hooks
are always called first and report back if they handled the option
or not.

Signed-off-by: goldsimon <goldsimon@gmx.de>
This commit is contained in:
goldsimon 2018-01-24 14:35:17 +01:00
parent 61671d6df0
commit ce79811bce
2 changed files with 60 additions and 0 deletions
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16
src/api/sockets.c
View File

@ -64,6 +64,10 @@
#include <string.h>
#ifdef LWIP_HOOK_FILENAME
#include LWIP_HOOK_FILENAME
#endif
/* If the netconn API is not required publicly, then we include the necessary
files here to get the implementation */
#if !LWIP_NETCONN
@ -2835,6 +2839,12 @@ lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *opt
return EBADF;
}
#ifdef LWIP_HOOK_SOCKETS_GETSOCKOPT
if (LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, &err)) {
return err;
}
#endif
switch (level) {
/* Level: SOL_SOCKET */
@ -3250,6 +3260,12 @@ lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_
return EBADF;
}
#ifdef LWIP_HOOK_SOCKETS_SETSOCKOPT
if (LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, &err)) {
return err;
}
#endif
switch (level) {
/* Level: SOL_SOCKET */

44
src/include/lwip/opt.h
View File

@ -2935,6 +2935,50 @@
#define LWIP_HOOK_DHCP_PARSE_OPTION(netif, dhcp, state, msg, msg_type, option, len, pbuf, offset)
#endif
/**
* LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err)
* Called from socket API to implement setsockopt() for options not provided by lwIP.
* Core lock is held when this hook is called.
* Signature:
* int my_hook(int s, struct lwip_sock *sock, int level, int optname, const void *optval, socklen_t optlen, int *err)
* Arguments:
* - s: socket file descriptor
* - sock: internal socket descriptor (see lwip/priv/sockets_priv.h)
* - level: protocol level at which the option resides
* - optname: option to set
* - optval: value to set
* - optlen: size of optval
* - err: output error
* Return values:
* - 0: Hook has not consumed the option, code continues as normal (to internal options)
* - != 0: Hook has consumed the option, 'err' is returned
*/
#ifdef __DOXYGEN__
#define LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err)
#endif
/**
* LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, err)
* Called from socket API to implement getsockopt() for options not provided by lwIP.
* Core lock is held when this hook is called.
* Signature:
* int my_hook(int s, struct lwip_sock *sock, int level, int optname, void *optval, socklen_t *optlen, int *err)
* Arguments:
* - s: socket file descriptor
* - sock: internal socket descriptor (see lwip/priv/sockets_priv.h)
* - level: protocol level at which the option resides
* - optname: option to get
* - optval: value to get
* - optlen: size of optval
* - err: output error
* Return values:
* - 0: Hook has not consumed the option, code continues as normal (to internal options)
* - != 0: Hook has consumed the option, 'err' is returned
*/
#ifdef __DOXYGEN__
#define LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, err)
#endif
/**
* LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, addrtype, err)
* Called from netconn APIs (not usable with callback apps) allowing an