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4680 | right-hear | 1 | #ifndef NETINET_IP_ICMP_H |
2 | #define NETINET_IP_ICMP_H |
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3 | |||
4 | #include |
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5 | #include |
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6 | #include |
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7 | |||
8 | __BEGIN_DECLS |
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9 | |||
10 | struct icmphdr { |
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11 | uint8_t type; /* message type */ |
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12 | uint8_t code; /* type sub-code */ |
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13 | uint16_t checksum; |
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14 | union { |
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15 | struct { |
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16 | uint16_t id; |
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17 | uint16_t sequence; |
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18 | } echo; /* echo datagram */ |
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19 | uint32_t gateway; /* gateway address */ |
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20 | struct { |
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21 | uint16_t __unused; |
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22 | uint16_t mtu; |
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23 | } frag; /* path mtu discovery */ |
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24 | } un; |
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25 | }; |
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26 | |||
27 | #define ICMP_ECHOREPLY 0 /* Echo Reply */ |
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28 | #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ |
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29 | #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ |
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30 | #define ICMP_REDIRECT 5 /* Redirect (change route) */ |
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31 | #define ICMP_ECHO 8 /* Echo Request */ |
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32 | #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ |
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33 | #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ |
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34 | #define ICMP_TIMESTAMP 13 /* Timestamp Request */ |
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35 | #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ |
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36 | #define ICMP_INFO_REQUEST 15 /* Information Request */ |
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37 | #define ICMP_INFO_REPLY 16 /* Information Reply */ |
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38 | #define ICMP_ADDRESS 17 /* Address Mask Request */ |
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39 | #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ |
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40 | #define NR_ICMP_TYPES 18 |
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41 | |||
42 | |||
43 | /* Codes for UNREACH. */ |
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44 | #define ICMP_NET_UNREACH 0 /* Network Unreachable */ |
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45 | #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ |
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46 | #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ |
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47 | #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ |
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48 | #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ |
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49 | #define ICMP_SR_FAILED 5 /* Source Route failed */ |
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50 | #define ICMP_NET_UNKNOWN 6 |
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51 | #define ICMP_HOST_UNKNOWN 7 |
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52 | #define ICMP_HOST_ISOLATED 8 |
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53 | #define ICMP_NET_ANO 9 |
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54 | #define ICMP_HOST_ANO 10 |
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55 | #define ICMP_NET_UNR_TOS 11 |
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56 | #define ICMP_HOST_UNR_TOS 12 |
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57 | #define ICMP_PKT_FILTERED 13 /* Packet filtered */ |
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58 | #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ |
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59 | #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ |
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60 | #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ |
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61 | |||
62 | /* Codes for REDIRECT. */ |
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63 | #define ICMP_REDIR_NET 0 /* Redirect Net */ |
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64 | #define ICMP_REDIR_HOST 1 /* Redirect Host */ |
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65 | #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ |
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66 | #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ |
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67 | |||
68 | /* Codes for TIME_EXCEEDED. */ |
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69 | #define ICMP_EXC_TTL 0 /* TTL count exceeded */ |
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70 | #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ |
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71 | |||
72 | /* |
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73 | * Lower bounds on packet lengths for various types. |
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74 | * For the error advice packets must first insure that the |
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75 | * packet is large enough to contain the returned ip header. |
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76 | * Only then can we do the check to see if 64 bits of packet |
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77 | * data have been returned, since we need to check the returned |
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78 | * ip header length. |
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79 | */ |
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80 | #define ICMP_MINLEN 8 /* abs minimum */ |
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81 | #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ |
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82 | #define ICMP_MASKLEN 12 /* address mask */ |
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83 | #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
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84 | #ifndef _IP_VHL |
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85 | #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
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86 | /* N.B.: must separately check that ip_hl >= 5 */ |
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87 | #else |
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88 | #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) |
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89 | /* N.B.: must separately check that header length >= 5 */ |
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90 | #endif |
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91 | |||
92 | /* Definition of type and code fields. */ |
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93 | /* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */ |
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94 | #define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
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95 | #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
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96 | #define ICMP_ROUTERADVERT 9 /* router advertisement */ |
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97 | #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ |
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98 | #define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
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99 | #define ICMP_PARAMPROB 12 /* ip header bad */ |
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100 | #define ICMP_TSTAMP 13 /* timestamp request */ |
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101 | #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
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102 | #define ICMP_IREQ 15 /* information request */ |
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103 | #define ICMP_IREQREPLY 16 /* information reply */ |
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104 | #define ICMP_MASKREQ 17 /* address mask request */ |
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105 | #define ICMP_MASKREPLY 18 /* address mask reply */ |
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106 | |||
107 | #define ICMP_MAXTYPE 18 |
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108 | |||
109 | /* UNREACH codes */ |
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110 | #define ICMP_UNREACH_NET 0 /* bad net */ |
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111 | #define ICMP_UNREACH_HOST 1 /* bad host */ |
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112 | #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
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113 | #define ICMP_UNREACH_PORT 3 /* bad port */ |
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114 | #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
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115 | #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
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116 | #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ |
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117 | #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ |
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118 | #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ |
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119 | #define ICMP_UNREACH_NET_PROHIB 9 /* net denied */ |
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120 | #define ICMP_UNREACH_HOST_PROHIB 10 /* host denied */ |
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121 | #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ |
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122 | #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ |
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123 | #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ |
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124 | #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ |
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125 | #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ |
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126 | |||
127 | /* REDIRECT codes */ |
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128 | #define ICMP_REDIRECT_NET 0 /* for network */ |
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129 | #define ICMP_REDIRECT_HOST 1 /* for host */ |
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130 | #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
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131 | #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
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132 | |||
133 | /* TIMEXCEED codes */ |
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134 | #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
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135 | #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
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136 | |||
137 | /* PARAMPROB code */ |
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138 | #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ |
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139 | |||
140 | #define ICMP_INFOTYPE(type) \ |
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141 | ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
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142 | (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ |
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143 | (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
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144 | (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
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145 | (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
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146 | |||
147 | __END_DECLS |
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148 | |||
149 | #endif><>><> |