1 /* in.h 4.4 81/11/18 */ 2 3 /* 4 * Constants and structures defined by the internet system, 5 * Per RFC 790, September 1981. 6 */ 7 8 /* 9 * Protocols 10 */ 11 #define IPPROTO_RAW -1 12 #define IPPROTO_ICMP 1 /* control message protocol */ 13 #define IPPROTO_GG 2 /* gateway^2 (deprecated) */ 14 #define IPPROTO_TCP 6 /* tcp */ 15 #define IPPROTO_PUP 12 /* pup */ 16 #define IPPROTO_UDP 17 /* user datagram protocol */ 17 18 #define IPPROTO_MAX 256 19 20 /* 21 * Port/socket numbers: network standard functions 22 */ 23 #define IPPORT_ECHO 7 24 #define IPPORT_DISCARD 9 25 #define IPPORT_SYSTAT 11 26 #define IPPORT_DAYTIME 13 27 #define IPPORT_NETSTAT 15 28 #define IPPORT_FTP 21 29 #define IPPORT_TELNET 23 30 #define IPPORT_SMTP 25 31 #define IPPORT_TIMESERVER 37 32 #define IPPORT_NAMESERVER 42 33 #define IPPORT_WHOIS 43 34 #define IPPORT_MTP 57 35 36 /* 37 * Port/socket numbers: host specific functions 38 */ 39 #define IPPORT_TFTP 69 40 #define IPPORT_RJE 77 41 #define IPPORT_FINGER 79 42 #define IPPORT_TTYLINK 87 43 #define IPPORT_SUPDUP 95 44 45 /* 46 * Link numbers 47 */ 48 #define IMPLINK_IP 155 49 #define IMPLINK_LOWEXPER 156 50 #define IMPLINK_HIGHEXPER 158 51 52 /* 53 * Internet address (old style... should be updated) 54 */ 55 struct in_addr { 56 union { 57 struct { u_char s_b1,s_b2,s_b3,s_b4; } S_un_b; 58 struct { u_short s_w1,s_w2; } S_un_w; 59 u_long s_l; 60 } S_un; 61 #define s_addr S_un.s_l /* can be used for most tcp & ip code */ 62 #define s_host S_un.S_un_b.s_b2 /* host on imp */ 63 #define s_net S_un.S_un_b.s_b1 /* network */ 64 #define s_imp S_un.S_un_w.s_w2 /* imp */ 65 #define s_lhost S_un.S_un_b.s_b1 /* net library format host on imp */ 66 #define s_lnet S_un.S_un_b.s_b2 /* net library format network */ 67 }; 68 69 /* 70 * Socket address, internet style. 71 */ 72 struct sockaddr_in { 73 short sin_family; 74 u_short sin_port; 75 struct in_addr sin_addr; 76 char sin_zero[8]; 77 }; 78