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https://github.com/SoftEtherVPN/SoftEtherVPN.git
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src/Mayaqua/TcpIp: remove dead code, unused variables and fuctions
found by coverity, cppcheck [src/Mayaqua/TcpIp.c:578]: (style) Variable 'tcp_size' is assigned a value that is never used. [src/Mayaqua/TcpIp.c:1034]: (style) Variable 'has_vlan_tag' is assigned a value that is never used. [src/Mayaqua/TcpIp.c:1996]: (style) Variable 'tcp_header_size' is assigned a value that is never used. [src/Mayaqua/TcpIp.c:127]: (style) The function 'IcmpEchoSend' is never used. [src/Mayaqua/TcpIp.c:2194]: (style) The function 'ParsePacketL2' is never used. [src/Mayaqua/TcpIp.c:251]: (style) The function 'IcmpEchoSendBySocket' is never used.
This commit is contained in:
Ilya Shipitsin
parent
b029676b67
commit
8ca0ce3efc
@ -122,30 +122,6 @@
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#include <errno.h>
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#include <Mayaqua/Mayaqua.h>
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// Send an ICMP Echo
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ICMP_RESULT *IcmpEchoSend(IP *dest_ip, UCHAR ttl, UCHAR *data, UINT size, UINT timeout)
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{
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// Validate arguments
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if (dest_ip == NULL || IsIP4(dest_ip) == false || (size != 0 && data == NULL))
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{
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return NULL;
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}
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if (ttl == 0)
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{
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ttl = 127;
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}
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if (IsIcmpApiSupported())
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{
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return IcmpApiEchoSend(dest_ip, ttl, data, size, timeout);
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}
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else
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{
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return IcmpEchoSendBySocket(dest_ip, ttl, data, size, timeout);
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}
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}
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// Release the memory for the ICMP response
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void IcmpFreeResult(ICMP_RESULT *r)
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{
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@ -271,138 +247,6 @@ ICMP_RESULT *IcmpParseResult(IP *dest_ip, USHORT src_id, USHORT src_seqno, UCHAR
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return ret;
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}
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// Send the ICMP Echo (by a socket)
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ICMP_RESULT *IcmpEchoSendBySocket(IP *dest_ip, UCHAR ttl, UCHAR *data, UINT size, UINT timeout)
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{
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SOCK *s;
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ICMP_RESULT *ret = NULL;
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USHORT id;
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USHORT seq;
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UINT64 sent_tick;
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UINT64 recv_tick;
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// Validate arguments
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if (dest_ip == NULL || IsIP4(dest_ip) == false || (size != 0 && data == NULL))
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{
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return NULL;
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}
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if (ttl == 0)
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{
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ttl = 127;
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}
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s = NewUDP4(MAKE_SPECIAL_PORT(IP_PROTO_ICMPV4), NULL);
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if (s != NULL)
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{
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// Construction of the ICMP packet
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UCHAR *send_buffer;
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UINT send_buffer_size = sizeof(ICMP_HEADER) + sizeof(ICMP_ECHO) + size;
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ICMP_HEADER *send_icmp_header;
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ICMP_ECHO *send_icmp_echo;
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UINT i;
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id = Rand16();
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if (id == 0)
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{
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id = 1;
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}
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seq = Rand16();
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if (seq == 0)
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{
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seq = 1;
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}
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send_buffer = ZeroMalloc(send_buffer_size);
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send_icmp_header = (ICMP_HEADER *)send_buffer;
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send_icmp_header->Type = ICMP_TYPE_ECHO_REQUEST;
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send_icmp_echo = (ICMP_ECHO *)(send_buffer + sizeof(ICMP_HEADER));
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send_icmp_echo->Identifier = Endian16(id);
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send_icmp_echo->SeqNo = Endian16(seq);
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Copy(send_buffer + sizeof(ICMP_HEADER) + sizeof(ICMP_ECHO), data, size);
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send_icmp_header->Checksum = IpChecksum(send_buffer, send_buffer_size);
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// Send an ICMP
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SetTtl(s, ttl);
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sent_tick = TickHighres64();
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i = SendTo(s, dest_ip, MAKE_SPECIAL_PORT(IP_PROTO_ICMPV4), send_buffer, send_buffer_size);
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if (i != 0 && i != INFINITE)
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{
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// ICMP response received
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INTERRUPT_MANAGER *interrupt = NewInterruptManager();
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UINT64 giveup_time = Tick64() + (UINT64)timeout;
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UINT recv_buffer_size = (sizeof(IPV4_HEADER) + sizeof(ICMP_HEADER) + sizeof(ICMP_ECHO) + size + 64) * 2;
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UCHAR *recv_buffer = Malloc(recv_buffer_size);
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AddInterrupt(interrupt, giveup_time);
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while (true)
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{
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UINT interval = GetNextIntervalForInterrupt(interrupt);
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IP src_ip;
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UINT src_port;
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SOCKSET set;
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InitSockSet(&set);
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AddSockSet(&set, s);
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Select(&set, interval, NULL, NULL);
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while (true)
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{
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Zero(recv_buffer, recv_buffer_size);
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i = RecvFrom(s, &src_ip, &src_port, recv_buffer, recv_buffer_size);
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recv_tick = TickHighres64();
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if (i != 0 && i != SOCK_LATER)
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{
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ret = IcmpParseResult(dest_ip, id, seq, recv_buffer, i);
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if (ret != NULL)
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{
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break;
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}
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}
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else
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{
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break;
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}
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}
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if (interval == 0)
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{
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break;
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}
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if (ret != NULL)
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{
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break;
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}
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}
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FreeInterruptManager(interrupt);
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Free(recv_buffer);
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if (ret == NULL)
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{
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ret = ZeroMalloc(sizeof(ICMP_RESULT));
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ret->Timeout = true;
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}
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}
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Free(send_buffer);
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ReleaseSock(s);
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}
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return ret;
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}
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// Get whether the packet is a DHCP packet associated with the specified MAC address
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bool IsDhcpPacketForSpecificMac(UCHAR *data, UINT size, UCHAR *mac_address)
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{
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@ -575,7 +419,6 @@ UINT GetIpHeaderSize(UCHAR *src, UINT src_size)
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{
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UCHAR ip_ver;
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TCP_HEADER *tcp = NULL;
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UINT tcp_size = 0;
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IPV4_HEADER *ip = NULL;
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IPV6_HEADER *ip6 = NULL;
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// Validate arguments
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@ -1031,7 +874,6 @@ void VLanInsertTag(void **packet_data, UINT *packet_size, UINT vlan_id, UINT vla
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// Remove the VLAN tag from the packet
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bool VLanRemoveTag(void **packet_data, UINT *packet_size, UINT vlan_id, UINT vlan_tpid)
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{
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bool has_vlan_tag = false;
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UCHAR *src_data;
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UINT src_size;
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USHORT vlan_tpid_ushort;
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@ -1993,7 +1835,6 @@ void CorrectChecksum(PKT *p)
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if (tcp != NULL)
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{
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UINT tcp_header_size = TCP_GET_HEADER_SIZE(tcp) * 4;
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USHORT tcp_offloading_checksum1 = CalcChecksumForIPv6(&v6->SrcAddress, &v6->DestAddress, IP_PROTO_TCP, NULL, 0, v6info->PayloadSize);
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USHORT tcp_offloading_checksum2 = ~tcp_offloading_checksum1;
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@ -2191,10 +2032,6 @@ HTTPLOG *ParseHttpAccessLog(PKT *pkt)
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// Layer-2 parsing
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bool ParsePacketL2(PKT *p, UCHAR *buf, UINT size)
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{
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return ParsePacketL2Ex(p, buf, size, false);
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}
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bool ParsePacketL2Ex(PKT *p, UCHAR *buf, UINT size, bool no_l3)
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{
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UINT i;
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@ -4062,11 +3899,6 @@ void DhcpParseClasslessRouteData(DHCP_CLASSLESS_ROUTE_TABLE *t, void *data, UINT
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}
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data_len = (subnet_mask_len + 7) / 8;
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if (data_len > 4)
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{
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// Invalid data
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break;
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}
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Zero(tmp, sizeof(tmp));
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if (ReadBuf(b, tmp, data_len) != data_len)
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@ -860,7 +860,6 @@ void FreePacketUDPv4(PKT *p);
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void FreePacketTCPv4(PKT *p);
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void FreePacketICMPv4(PKT *p);
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void FreePacketDHCPv4(PKT *p);
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bool ParsePacketL2(PKT *p, UCHAR *buf, UINT size);
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bool ParsePacketL2Ex(PKT *p, UCHAR *buf, UINT size, bool no_l3);
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bool ParsePacketARPv4(PKT *p, UCHAR *buf, UINT size);
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bool ParsePacketIPv4(PKT *p, UCHAR *buf, UINT size);
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@ -909,8 +908,6 @@ UCHAR GetNextByte(BUF *b);
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bool IsDhcpPacketForSpecificMac(UCHAR *data, UINT size, UCHAR *mac_address);
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ICMP_RESULT *IcmpEchoSendBySocket(IP *dest_ip, UCHAR ttl, UCHAR *data, UINT size, UINT timeout);
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ICMP_RESULT *IcmpEchoSend(IP *dest_ip, UCHAR ttl, UCHAR *data, UINT size, UINT timeout);
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ICMP_RESULT *IcmpParseResult(IP *dest_ip, USHORT src_id, USHORT src_seqno, UCHAR *recv_buffer, UINT recv_buffer_size);
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void IcmpFreeResult(ICMP_RESULT *r);
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