Include dependency graph for proto.h:
This graph shows which files directly or indirectly include this file:
Go to the source code of this file.
Data Structures | |
| struct | openvpn_ethhdr |
| struct | openvpn_8021qhdr |
| struct | openvpn_arp |
| struct | openvpn_iphdr |
| struct | openvpn_ipv6hdr |
| struct | openvpn_icmp6hdr |
| struct | openvpn_udphdr |
| struct | openvpn_tcphdr |
| struct | ip_tcp_udp_hdr |
Macros | |
| #define | DEV_TYPE_UNDEF 0 |
| #define | DEV_TYPE_NULL 1 |
| #define | DEV_TYPE_TUN 2 /* point-to-point IP tunnel */ |
| #define | DEV_TYPE_TAP 3 /* ethernet (802.3) tunnel */ |
| #define | TOP_UNDEF 0 |
| #define | TOP_NET30 1 |
| #define | TOP_P2P 2 |
| #define | TOP_SUBNET 3 |
| #define | OPENVPN_ETH_ALEN 6 /* ethernet address length */ |
| #define | OPENVPN_ETH_P_IPV4 0x0800 /* IPv4 protocol */ |
| #define | OPENVPN_ETH_P_IPV6 0x86DD /* IPv6 protocol */ |
| #define | OPENVPN_ETH_P_ARP 0x0806 /* ARP protocol */ |
| #define | OPENVPN_ETH_P_8021Q 0x8100 /* 802.1Q protocol */ |
| #define | OPENVPN_8021Q_MASK_PCP htons(0xE000) /* mask PCP out of pcp_cfi_vid */ |
| #define | OPENVPN_8021Q_MASK_CFI htons(0x1000) /* mask CFI out of pcp_cfi_vid */ |
| #define | OPENVPN_8021Q_MASK_VID htons(0x0FFF) /* mask VID out of pcp_cfi_vid */ |
| #define | SIZE_ETH_TO_8021Q_HDR |
| #define | ARP_MAC_ADDR_TYPE 0x0001 |
| #define | ARP_REQUEST 0x0001 |
| #define | ARP_REPLY 0x0002 |
| #define | OPENVPN_IPH_GET_VER(v) (((v) >> 4) & 0x0F) |
| #define | OPENVPN_IPH_GET_LEN(v) (((v) & 0x0F) << 2) |
| #define | OPENVPN_IP_OFFMASK 0x1fff |
| #define | OPENVPN_IPPROTO_IGMP 2 /* IGMP protocol */ |
| #define | OPENVPN_IPPROTO_TCP 6 /* TCP protocol */ |
| #define | OPENVPN_IPPROTO_UDP 17 /* UDP protocol */ |
| #define | OPENVPN_IPPROTO_ICMPV6 58 /* ICMPV6 protocol */ |
| #define | OPENVPN_ICMP6_DESTINATION_UNREACHABLE 1 |
| #define | OPENVPN_ND_ROUTER_SOLICIT 133 |
| #define | OPENVPN_ND_ROUTER_ADVERT 134 |
| #define | OPENVPN_ND_NEIGHBOR_SOLICIT 135 |
| #define | OPENVPN_ND_NEIGHBOR_ADVERT 136 |
| #define | OPENVPN_ND_INVERSE_SOLICIT 141 |
| #define | OPENVPN_ND_INVERSE_ADVERT 142 |
| #define | OPENVPN_ICMP6_DU_NOROUTE 0 |
| #define | OPENVPN_ICMP6_DU_COMMUNICATION_PROHIBTED 1 |
| #define | OPENVPN_TCPH_GET_DOFF(d) (((d) & 0xF0) >> 2) |
| #define | OPENVPN_TCPH_FIN_MASK (1<<0) |
| #define | OPENVPN_TCPH_SYN_MASK (1<<1) |
| #define | OPENVPN_TCPH_RST_MASK (1<<2) |
| #define | OPENVPN_TCPH_PSH_MASK (1<<3) |
| #define | OPENVPN_TCPH_ACK_MASK (1<<4) |
| #define | OPENVPN_TCPH_URG_MASK (1<<5) |
| #define | OPENVPN_TCPH_ECE_MASK (1<<6) |
| #define | OPENVPN_TCPH_CWR_MASK (1<<7) |
| #define | OPENVPN_TCPOPT_EOL 0 |
| #define | OPENVPN_TCPOPT_NOP 1 |
| #define | OPENVPN_TCPOPT_MAXSEG 2 |
| #define | OPENVPN_TCPOLEN_MAXSEG 4 |
| #define | ADJUST_CHECKSUM(acc, cksum) |
| #define | ADD_CHECKSUM_32(acc, u32) |
| #define | SUB_CHECKSUM_32(acc, u32) |
| #define | OPENVPN_8021Q_MIN_VID 1 |
| #define | OPENVPN_8021Q_MAX_VID 4094 |
Functions | |
| static int | get_tun_ip_ver (int tunnel_type, struct buffer *buf, int *ip_hdr_offset) |
| bool | is_ipv4 (int tunnel_type, struct buffer *buf) |
| bool | is_ipv6 (int tunnel_type, struct buffer *buf) |
| uint16_t | ip_checksum (const sa_family_t af, const uint8_t *payload, const int len_payload, const uint8_t *src_addr, const uint8_t *dest_addr, const int proto) |
| Calculates an IP or IPv6 checksum with a pseudo header as required by TCP, UDP and ICMPv6. More... | |
Macro Definition Documentation
◆ ADD_CHECKSUM_32
| #define ADD_CHECKSUM_32 | ( | acc, | |
| u32 | |||
| ) |
◆ ADJUST_CHECKSUM
| #define ADJUST_CHECKSUM | ( | acc, | |
| cksum | |||
| ) |
Value:
{ \
int _acc = acc; \
_acc += (cksum); \
if (_acc < 0) { \
_acc = -_acc; \
_acc = (_acc >> 16) + (_acc & 0xffff); \
_acc += _acc >> 16; \
(cksum) = (uint16_t) ~_acc; \
} else { \
_acc = (_acc >> 16) + (_acc & 0xffff); \
_acc += _acc >> 16; \
(cksum) = (uint16_t) _acc; \
} \
}
◆ ARP_MAC_ADDR_TYPE
◆ ARP_REPLY
◆ ARP_REQUEST
◆ DEV_TYPE_NULL
◆ DEV_TYPE_TAP
◆ DEV_TYPE_TUN
◆ DEV_TYPE_UNDEF
◆ OPENVPN_8021Q_MASK_CFI
| #define OPENVPN_8021Q_MASK_CFI htons(0x1000) /* mask CFI out of pcp_cfi_vid */ |
◆ OPENVPN_8021Q_MASK_PCP
| #define OPENVPN_8021Q_MASK_PCP htons(0xE000) /* mask PCP out of pcp_cfi_vid */ |
◆ OPENVPN_8021Q_MASK_VID
| #define OPENVPN_8021Q_MASK_VID htons(0x0FFF) /* mask VID out of pcp_cfi_vid */ |
◆ OPENVPN_8021Q_MAX_VID
◆ OPENVPN_8021Q_MIN_VID
◆ OPENVPN_ETH_ALEN
◆ OPENVPN_ETH_P_8021Q
◆ OPENVPN_ETH_P_ARP
◆ OPENVPN_ETH_P_IPV4
◆ OPENVPN_ETH_P_IPV6
◆ OPENVPN_ICMP6_DESTINATION_UNREACHABLE
◆ OPENVPN_ICMP6_DU_COMMUNICATION_PROHIBTED
◆ OPENVPN_ICMP6_DU_NOROUTE
◆ OPENVPN_IP_OFFMASK
◆ OPENVPN_IPH_GET_LEN
◆ OPENVPN_IPH_GET_VER
◆ OPENVPN_IPPROTO_ICMPV6
◆ OPENVPN_IPPROTO_IGMP
◆ OPENVPN_IPPROTO_TCP
◆ OPENVPN_IPPROTO_UDP
◆ OPENVPN_ND_INVERSE_ADVERT
◆ OPENVPN_ND_INVERSE_SOLICIT
◆ OPENVPN_ND_NEIGHBOR_ADVERT
◆ OPENVPN_ND_NEIGHBOR_SOLICIT
◆ OPENVPN_ND_ROUTER_ADVERT
◆ OPENVPN_ND_ROUTER_SOLICIT
◆ OPENVPN_TCPH_ACK_MASK
◆ OPENVPN_TCPH_CWR_MASK
◆ OPENVPN_TCPH_ECE_MASK
◆ OPENVPN_TCPH_FIN_MASK
◆ OPENVPN_TCPH_GET_DOFF
◆ OPENVPN_TCPH_PSH_MASK
◆ OPENVPN_TCPH_RST_MASK
◆ OPENVPN_TCPH_SYN_MASK
◆ OPENVPN_TCPH_URG_MASK
◆ OPENVPN_TCPOLEN_MAXSEG
◆ OPENVPN_TCPOPT_EOL
◆ OPENVPN_TCPOPT_MAXSEG
◆ OPENVPN_TCPOPT_NOP
◆ SIZE_ETH_TO_8021Q_HDR
| #define SIZE_ETH_TO_8021Q_HDR |
Value:
- sizeof(struct openvpn_ethhdr))
◆ SUB_CHECKSUM_32
| #define SUB_CHECKSUM_32 | ( | acc, | |
| u32 | |||
| ) |
◆ TOP_NET30
◆ TOP_P2P
◆ TOP_SUBNET
◆ TOP_UNDEF
Function Documentation
◆ get_tun_ip_ver()
|
inlinestatic |
Definition at line 255 of file proto.h.
References BLEN, BPTR, DEV_TYPE_TAP, DEV_TYPE_TUN, likely, OPENVPN_ETH_P_IPV4, OPENVPN_ETH_P_IPV6, OPENVPN_IPH_GET_VER, and openvpn_ethhdr::proto.
Referenced by drop_if_recursive_routing().
◆ ip_checksum()
| uint16_t ip_checksum | ( | const sa_family_t | af, |
| const uint8_t * | payload, | ||
| const int | len_payload, | ||
| const uint8_t * | src_addr, | ||
| const uint8_t * | dest_addr, | ||
| const int | proto | ||
| ) |
Calculates an IP or IPv6 checksum with a pseudo header as required by TCP, UDP and ICMPv6.
- Parameters
-
af - Address family for which the checksum is calculated AF_INET or AF_INET6 payload - the TCP, ICMPv6 or UDP packet len_payload - length of payload src_addr - Source address of the packet dest_addr - Destination address of the packet proto next - header or IP protocol of the packet
- Returns
- The calculated checksum in host order
Definition at line 123 of file proto.c.
Referenced by dhcp_extract_router_msg(), and ipv6_send_icmp_unreachable().
◆ is_ipv4()
| bool is_ipv4 | ( | int | tunnel_type, |
| struct buffer * | buf | ||
| ) |
◆ is_ipv6()
| bool is_ipv6 | ( | int | tunnel_type, |
| struct buffer * | buf | ||
| ) |
Definition at line 116 of file proto.c.
References is_ipv_X().
Referenced by ipv6_send_icmp_unreachable(), and process_ip_header().
