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Merge pull request #1994 from hiura2023/master

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Fix Virtual DHCP Server: Correct IP reassignment
This commit is contained in:
Ilya Shipitsin 2024-05-27 13:13:40 +02:00 committed by GitHub
commit bfaff4fdb0
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2 changed files with 68 additions and 53 deletions
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58
src/Cedar/Virtual.c
View File

@ -9349,62 +9349,35 @@ UINT ServeDhcpDiscoverEx(VH *v, UCHAR *mac, UINT request_ip, bool is_static_ip)
// check whether it is a request from the same MAC address
if (Cmp(mac, d->MacAddress, 6) == 0)
{
// Examine whether the specified IP address is within the range of assignment
// Examine whether the specified IP address is within the range of static assignment
if (Endian32(v->DhcpIpStart) > Endian32(request_ip) ||
Endian32(request_ip) > Endian32(v->DhcpIpEnd))
{
// Accept if within the range
// Accept if within the range of static assignment
ret = request_ip;
}
}
else {
// Duplicated IPV4 address found. The DHCP server replies to DHCPREQUEST with DHCP NAK.
// Duplicated IPV4 address found. The specified IP address is not available for use
char ipstr[MAX_HOST_NAME_LEN + 1] = { 0 };
char macstr[128] = { 0 };
IPToStr32(ipstr, sizeof(ipstr), request_ip);
BinToStr(macstr, sizeof(macstr), d->MacAddress, 6);
Debug("Virtual DHC Server: Duplicated IP address detected. Static IP: %s, Used by MAC:%s\n", ipstr, macstr);
return ret;
MacToStr(macstr, sizeof(macstr), d->MacAddress);
Debug("Virtual DHC Server: Duplicated IP address detected. Static IP: %s, with the MAC: %s\n", ipstr, macstr);
}
}
else
{
// Examine whether the specified IP address is within the range of assignment
// Examine whether the specified IP address is within the range of static assignment
if (Endian32(v->DhcpIpStart) > Endian32(request_ip) ||
Endian32(request_ip) > Endian32(v->DhcpIpEnd))
{
// Accept if within the range
// Accept if within the range of static assignment
ret = request_ip;
}
else
{
// Propose an IP in the range since it's a Discover although It is out of range
}
}
if (ret == 0)
{
// If there is any entry with the same MAC address
// that are already registered, use it with priority
DHCP_LEASE *d = SearchDhcpLeaseByMac(v, mac);
if (d != NULL)
{
// Examine whether the found IP address is in the allocation region
if (Endian32(v->DhcpIpStart) > Endian32(d->IpAddress) ||
Endian32(d->IpAddress) > Endian32(v->DhcpIpEnd))
{
// Use the IP address if it's found within the range
ret = d->IpAddress;
}
}
}
if (ret == 0)
{
// For static IP, the requested IP address must NOT be within the range of the DHCP pool
if (Endian32(v->DhcpIpStart) > Endian32(request_ip) ||
Endian32(request_ip) > Endian32(v->DhcpIpEnd))
{
ret = request_ip;
// The specified IP address is not available for use
}
}
@ -9595,6 +9568,11 @@ void VirtualDhcpServer(VH *v, PKT *p)
{
ip = ServeDhcpRequestEx(v, p->MacAddressSrc, opt->RequestedIp, ip_static);
}
// If the IP address in user's note is changed, then reply to DHCP_REQUEST with DHCP_NAK
if (p->L3.IPv4Header->SrcIP && ip != p->L3.IPv4Header->SrcIP)
{
ip = 0;
}
}
if (ip != 0 || opt->Opcode == DHCP_INFORM)
@ -9607,6 +9585,14 @@ void VirtualDhcpServer(VH *v, PKT *p)
char client_mac[MAX_SIZE];
char client_ip[MAX_SIZE];
// If there is any entry with the same MAC address, then remove it
d = SearchDhcpLeaseByMac(v, p->MacAddressSrc);
if (d != NULL)
{
FreeDhcpLease(d);
Delete(v->DhcpLeaseList, d);
}
// Remove old records with the same IP address
d = SearchDhcpLeaseByIp(v, ip);
if (d != NULL)
@ -9765,7 +9751,7 @@ void VirtualDhcpServer(VH *v, PKT *p)
}
else
{
// Reply of DHCP_REQUEST must be either DHCP_ACK or DHCP_NAK.
// Reply of DHCP_REQUEST must be either DHCP_ACK or DHCP_NAK
if (opt->Opcode == DHCP_REQUEST)
{
// There is no IP address that can be provided

43
src/Mayaqua/Network.c
View File

@ -12288,6 +12288,11 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
ret = SSL_peek(ssl, &c, sizeof(c));
}
Unlock(sock->ssl_lock);
#if OPENSSL_VERSION_NUMBER < 0x30000000L
// 2021/09/10: After OpenSSL 3.x.x, both 0 and negative values might mean retryable.
// See: https://github.com/openssl/openssl/blob/435981cbadad2c58c35bacd30ca5d8b4c9bea72f/doc/man3/SSL_read.pod
// > Old documentation indicated a difference between 0 and -1, and that -1 was retryable.
// > You should instead call SSL_get_error() to find out if it's retryable.
if (ret == 0)
{
// The communication have been disconnected
@ -12295,7 +12300,8 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
Debug("%s %u SecureRecv() Disconnect\n", __FILE__, __LINE__);
return 0;
}
if (ret < 0)
#endif
if (ret <= 0)
{
// An error has occurred
e = SSL_get_error(ssl, ret);
@ -12310,7 +12316,9 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
#endif
)
{
Debug("%s %u SSL Fatal Error on ASYNC socket !!!\n", __FILE__, __LINE__);
UINT ssl_err_no = ERR_get_error();
Debug("%s %u SSL_ERROR_SSL on ASYNC socket !!! ssl_err_no = %u: '%s'\n", __FILE__, __LINE__, ssl_err_no, ERR_error_string(ssl_err_no, NULL));
Disconnect(sock);
return 0;
}
@ -12337,14 +12345,14 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
}
#endif // OS_UNIX
// Run the time-out thread for SOLARIS
// Run the time-out thread for SOLARIS
#ifdef UNIX_SOLARIS
ttparam = NewSocketTimeout(sock);
#endif // UNIX_SOLARIS
ret = SSL_read(ssl, data, size);
// Stop the timeout thread
// Stop the timeout thread
#ifdef UNIX_SOLARIS
FreeSocketTimeout(ttparam);
#endif // UNIX_SOLARIS
@ -12357,7 +12365,11 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
}
#endif // OS_UNIX
if (ret < 0)
#if OPENSSL_VERSION_NUMBER < 0x30000000L
if (ret < 0) // OpenSSL version < 3.0.0
#else
if (ret <= 0) // OpenSSL version >= 3.0.0
#endif
{
e = SSL_get_error(ssl, ret);
}
@ -12380,6 +12392,12 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
return (UINT)ret;
}
#if OPENSSL_VERSION_NUMBER < 0x30000000L
// 2021/09/10: After OpenSSL 3.x.x, both 0 and negative values might mean retryable.
// See: https://github.com/openssl/openssl/blob/435981cbadad2c58c35bacd30ca5d8b4c9bea72f/doc/man3/SSL_read.pod
// > Old documentation indicated a difference between 0 and -1, and that -1 was retryable.
// > You should instead call SSL_get_error() to find out if it's retryable.
if (ret == 0)
{
// Disconnect the communication
@ -12387,6 +12405,8 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
//Debug("%s %u SecureRecv() Disconnect\n", __FILE__, __LINE__);
return 0;
}
#endif
if (sock->AsyncMode)
{
if (e == SSL_ERROR_WANT_READ || e == SSL_ERROR_WANT_WRITE || e == SSL_ERROR_SSL)
@ -12400,7 +12420,9 @@ UINT SecureRecv(SOCK *sock, void *data, UINT size)
#endif
)
{
Debug("%s %u SSL Fatal Error on ASYNC socket !!!\n", __FILE__, __LINE__);
UINT ssl_err_no = ERR_get_error();
Debug("%s %u SSL_ERROR_SSL on ASYNC socket !!! ssl_err_no = %u: '%s'\n", __FILE__, __LINE__, ssl_err_no, ERR_error_string(ssl_err_no, NULL));
Disconnect(sock);
return 0;
}
@ -12438,7 +12460,11 @@ UINT SecureSend(SOCK *sock, void *data, UINT size)
}
ret = SSL_write(ssl, data, size);
if (ret < 0)
#if OPENSSL_VERSION_NUMBER < 0x30000000L
if (ret < 0) // OpenSSL version < 3.0.0
#else
if (ret <= 0) // OpenSSL version >= 3.0.0
#endif
{
e = SSL_get_error(ssl, ret);
}
@ -12460,6 +12486,8 @@ UINT SecureSend(SOCK *sock, void *data, UINT size)
sock->WriteBlocked = false;
return (UINT)ret;
}
#if OPENSSL_VERSION_NUMBER < 0x30000000L
if (ret == 0)
{
// Disconnect
@ -12467,6 +12495,7 @@ UINT SecureSend(SOCK *sock, void *data, UINT size)
Disconnect(sock);
return 0;
}
#endif
if (sock->AsyncMode)
{