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cwTcpSocket.h/cpp : Added get_mac()

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This commit is contained in:
kpl 2020-02-01 10:12:51 -05:00
parent 7d2fb0d234
commit 5927fcb43b
2 changed files with 56 additions and 2 deletions
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53
cwTcpSocket.cpp
View File

@ -4,6 +4,8 @@
#include "cwMem.h"
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
@ -471,7 +473,9 @@ cw::rc_t cw::net::socket::recieve( handle_t h, char* data, unsigned dataByteCnt,
// if the read 0 bytes but did not time out this probably means that it was disconnected
if( retVal == 0 )
p->flags = cwClrFlag(p->flags,kIsConnectedFl);
{
//p->flags = cwClrFlag(p->flags,kIsConnectedFl);
}
if( recvByteCntRef != NULL )
*recvByteCntRef = retVal;
@ -575,6 +579,53 @@ cw::rc_t cw::net::socket::recv_from(handle_t h, char* buf, unsigned bufByteCnt,
return rc;
}
cw::rc_t cw::net::socket::get_mac( handle_t h, unsigned char outBuf[6], const char* interfaceName )
{
cw::rc_t rc = kOkRC;
socket_t* p = _handleToPtr(h);
struct ifreq ifr;
struct ifconf ifc;
char buf[1024];
ifc.ifc_len = sizeof(buf);
ifc.ifc_buf = buf;
if (ioctl(p->sockH, SIOCGIFCONF, &ifc) == -1)
{
rc = cwLogSysError(kOpFailRC,errno,"ioctl(SIOCGIFCONF) failed.");
return rc;
}
struct ifreq* it = ifc.ifc_req;
const struct ifreq* const end = it + (ifc.ifc_len / sizeof(struct ifreq));
for (; it != end; ++it)
{
if( strcmp(it->ifr_name,interfaceName ) == 0 )
{
strcpy(ifr.ifr_name, it->ifr_name);
if (ioctl(p->sockH, SIOCGIFFLAGS, &ifr) != 0)
{
rc = cwLogSysError(kOpFailRC,errno,"ioctl(SIOCGIFCONF) failed.");
}
else
{
if (! (ifr.ifr_flags & IFF_LOOPBACK))
{
// don't count loopback
if (ioctl(p->sockH, SIOCGIFHWADDR, &ifr) == 0)
{
memcpy(outBuf, ifr.ifr_hwaddr.sa_data, 6);
return kOkRC;
}
}
}
}
}
return cwLogError(kInvalidArgRC,"The MAC address of interface '%s' could not be found.", interfaceName);
}
cw::rc_t cw::net::socket::initAddr( handle_t h, const char* addrStr, portNumber_t portNumber, struct sockaddr_in* retAddrPtr )
{

3
cwTcpSocket.h
View File

@ -85,6 +85,9 @@ namespace cw
//
rc_t recv_from(handle_t h, char* buf, unsigned bufByteCnt, unsigned* recvByteCntRef=nullptr, struct sockaddr_in* fromAddr=nullptr );
// Note that
rc_t get_mac( handle_t h, unsigned char buf[6], const char* interfaceName=nullptr );
// Prepare a struct sockadddr_in for use with send()
rc_t initAddr( handle_t h, const char* addrStr, portNumber_t portNumber, struct sockaddr_in* retAddrPtr );