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Annotation of cf/net.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2006 Christophe Fillot.
        !             3:  * E-mail: [email protected]
        !             4:  *
        !             5:  * net.h: Protocol Headers and Constants Definitions.
        !             6:  */
        !             7: 
        !             8: #ifndef __NET_H__
        !             9: #define __NET_H__  1
        !            10: 
        !            11: #include "utils.h"
        !            12: 
        !            13: #define N_IP_ADDR_LEN   4 
        !            14: #define N_IP_ADDR_BITS  32
        !            15: 
        !            16: #define N_IPV6_ADDR_LEN   16
        !            17: #define N_IPV6_ADDR_BITS  128
        !            18: 
        !            19: /* IPv4 Address definition */
        !            20: typedef m_uint32_t n_ip_addr_t;
        !            21: 
        !            22: /* IP Network definition */
        !            23: typedef struct {
        !            24:    n_ip_addr_t net_addr;
        !            25:    n_ip_addr_t net_mask;
        !            26: }n_ip_network_t;
        !            27: 
        !            28: /* IPv6 Address definition */
        !            29: typedef struct {
        !            30:    union {
        !            31:       m_uint32_t u6_addr32[4];
        !            32:       m_uint16_t u6_addr16[8];
        !            33:       m_uint8_t  u6_addr8[16];
        !            34:    }ip6;
        !            35: }n_ipv6_addr_t;
        !            36: 
        !            37: /* IPv6 Network definition */
        !            38: typedef struct {
        !            39:    n_ipv6_addr_t net_addr;
        !            40:    u_int net_mask;
        !            41: }n_ipv6_network_t;
        !            42: 
        !            43: /* IP: Common Protocols */
        !            44: #define N_IP_PROTO_ICMP    1
        !            45: #define N_IP_PROTO_IGMP    2
        !            46: #define N_IP_PROTO_TCP     6
        !            47: #define N_IP_PROTO_UDP     17
        !            48: #define N_IP_PROTO_IPV6    41
        !            49: #define N_IP_PROTO_GRE     47
        !            50: #define N_IP_PROTO_ESP     50
        !            51: #define N_IP_PROTO_AH      51
        !            52: #define N_IP_PROTO_ICMPV6  58
        !            53: #define N_IP_PROTO_EIGRP   88
        !            54: #define N_IP_PROTO_OSPF    89
        !            55: #define N_IP_PROTO_PIM     103
        !            56: #define N_IP_PROTO_SCTP    132
        !            57: #define N_IP_PROTO_MAX     256
        !            58: 
        !            59: #define N_IP_OFFMASK   0x1fff
        !            60: 
        !            61: /* Maximum number of ports */
        !            62: #define N_IP_PORT_MAX  65536
        !            63: 
        !            64: /* TCP: Header Flags */
        !            65: #define N_TCP_FIN    0x01
        !            66: #define N_TCP_SYN    0x02
        !            67: #define N_TCP_RST    0x04
        !            68: #define N_TCP_PUSH   0x08
        !            69: #define N_TCP_ACK    0x10
        !            70: #define N_TCP_URG    0x20
        !            71: 
        !            72: #define N_TCP_FLAGMASK   0x3F
        !            73: 
        !            74: /* IPv6 Header Codes */
        !            75: #define N_IPV6_PROTO_ICMP       58
        !            76: #define N_IPV6_OPT_HOP_BY_HOP    0   /* Hop-by-Hop header */
        !            77: #define N_IPV6_OPT_DST          60   /* Destination Options Header */
        !            78: #define N_IPV6_OPT_ROUTE        43   /* Routing header */
        !            79: #define N_IPV6_OPT_FRAG         44   /* Fragment Header */
        !            80: #define N_IPV6_OPT_AH           51   /* Authentication Header */
        !            81: #define N_IPV6_OPT_ESP          50   /* Encryption Security Payload */
        !            82: #define N_IPV6_OPT_COMP        108   /* Payload Compression Protocol */
        !            83: #define N_IPV6_OPT_END          59   /* No more headers */
        !            84: 
        !            85: /* Standard Ethernet MTU */
        !            86: #define N_ETH_MTU   1500
        !            87: 
        !            88: /* Ethernet Constants */
        !            89: #define N_ETH_ALEN  6
        !            90: #define N_ETH_HLEN  sizeof(n_eth_hdr_t)
        !            91: 
        !            92: /* Minimum size for ethernet payload */
        !            93: #define N_ETH_MIN_DATA_LEN   46
        !            94: #define N_ETH_MIN_FRAME_LEN  (N_ETH_MIN_DATA_LEN + N_ETH_HLEN)
        !            95: 
        !            96: #define N_ETH_PROTO_IP       0x0800
        !            97: #define N_ETH_PROTO_IPV6     0x86DD
        !            98: #define N_ETH_PROTO_ARP      0x0806
        !            99: #define N_ETH_PROTO_DOT1Q    0x8100
        !           100: #define N_ETH_PROTO_DOT1Q_2  0x9100
        !           101: #define N_ETH_PROTO_DOT1Q_3  0x9200
        !           102: #define N_ETH_PROTO_MPLS     0x8847
        !           103: #define N_ETH_PROTO_MPLS_MC  0x8848
        !           104: #define N_ETH_PROTO_LOOP     0x9000
        !           105: 
        !           106: /* size needed for a string buffer */
        !           107: #define N_ETH_SLEN  (N_ETH_ALEN*3)
        !           108: 
        !           109: /* ARP opcodes */
        !           110: #define N_ARP_REQUEST  0x1
        !           111: #define N_ARP_REPLY    0x2
        !           112: 
        !           113: /* Ethernet Address */
        !           114: typedef struct {
        !           115:    m_uint8_t eth_addr_byte[N_ETH_ALEN];
        !           116: } __attribute__ ((__packed__)) n_eth_addr_t;
        !           117: 
        !           118: /* Ethernet Header */
        !           119: typedef struct {
        !           120:    n_eth_addr_t daddr;   /* destination eth addr */
        !           121:    n_eth_addr_t saddr;   /* source ether addr    */
        !           122:    m_uint16_t  type;     /* packet type ID field */
        !           123: } __attribute__ ((__packed__)) n_eth_hdr_t;
        !           124: 
        !           125: /* LLC header */
        !           126: typedef struct {
        !           127:    m_uint8_t dsap;
        !           128:    m_uint8_t ssap;
        !           129:    m_uint8_t ctrl;
        !           130: } __attribute__ ((__packed__)) n_eth_llc_hdr_t;
        !           131: 
        !           132: /* SNAP header */
        !           133: typedef struct {
        !           134:    m_uint8_t oui[3];
        !           135:    m_uint16_t type;
        !           136: } __attribute__ ((__packed__)) n_eth_snap_hdr_t;
        !           137: 
        !           138: /* Cisco ISL header */
        !           139: typedef struct {
        !           140:    m_uint16_t hsa1;               /* High bits of source MAC address */
        !           141:    m_uint8_t  hsa2;               /* (in theory: 0x00-00-0c) */
        !           142:    m_uint16_t vlan;               /* VLAN + BPDU */
        !           143:    m_uint16_t index;              /* Index port of source */
        !           144:    m_uint16_t res;                /* Reserved for TokenRing and FDDI */
        !           145: } __attribute__ ((__packed__)) n_eth_isl_hdr_t;
        !           146: 
        !           147: #define N_ISL_HDR_SIZE  (sizeof(n_eth_llc_hdr_t) + sizeof(n_eth_isl_hdr_t))
        !           148: 
        !           149: /* Check for a broadcast/multicast ethernet address */
        !           150: static inline int eth_addr_is_mcast(n_eth_addr_t *addr)
        !           151: {
        !           152:    return(addr->eth_addr_byte[0] & 1);
        !           153: }
        !           154: 
        !           155: /* Number of bits in a contiguous netmask */
        !           156: static inline int ip_bits_mask(n_ip_addr_t mask)
        !           157: {
        !           158:    int prefix = 0;
        !           159: 
        !           160:    while(mask) {
        !           161:       prefix++;
        !           162:       mask = mask & (mask - 1);
        !           163:    }
        !           164:    return(prefix);
        !           165: }
        !           166: 
        !           167: /* Initialize IPv6 masks */
        !           168: void ipv6_init_masks(void);
        !           169: 
        !           170: /* Convert an IPv4 address into a string */
        !           171: char *ip_ntoa(char *buffer,n_ip_addr_t ip_addr);
        !           172: 
        !           173: /* Convert in IPv6 address into a string */
        !           174: char *ipv6_ntoa(char *buffer,n_ipv6_addr_t *ipv6_addr);
        !           175: 
        !           176: /* Convert a string containing an IP address in binary */
        !           177: int ip_aton(n_ip_addr_t *ip_addr,char *ip_str);
        !           178: 
        !           179: /* Convert an IPv6 address from string into binary */
        !           180: int ipv6_aton(n_ipv6_addr_t *ipv6_addr,char *ip_str);
        !           181: 
        !           182: /* Parse an IPv4 CIDR prefix */
        !           183: int ip_parse_cidr(char *token,n_ip_addr_t *net_addr,n_ip_addr_t *net_mask);
        !           184: 
        !           185: /* Parse an IPv6 CIDR prefix */
        !           186: int ipv6_parse_cidr(char *token,n_ipv6_addr_t *net_addr,u_int *net_mask);
        !           187: 
        !           188: /* Create a new socket to connect to specified host */
        !           189: int udp_connect(int local_port,char *remote_host,int remote_port);
        !           190: 
        !           191: #endif

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