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- /* Global structures and constants needed by an Internet user process */
- extern char hosts[]; /* Host table */
-
- #define NCONN 20 /* Maximum number of open network connections */
-
- extern int32 ip_addr; /* Our IP address */
-
- extern int net_error; /* Error return code */
- #define NONE 0 /* No error */
- #define CON_EXISTS 1 /* Connection already exists */
- #define NO_CONN 2 /* Connection does not exist */
- #define CON_CLOS 3 /* Connection closing */
- #define NO_SPACE 4 /* No memory for TCB creation */
- #define WOULDBLK 5 /* Would block */
- #define NOPROTO 6 /* Protocol or mode not supported */
- #define INVALID 7 /* Invalid arguments */
-
- /* Codes for the tcp_open call */
- #define TCP_PASSIVE 0
- #define TCP_ACTIVE 1
- #define TCP_SERVER 2 /* Passive, clone on opening */
-
- /* Socket structure */
- struct socket {
- int32 address; /* IP address */
- int16 port; /* port number */
- };
-
- /* Connection structure (two sockets) */
- struct connection {
- struct socket local;
- struct socket remote;
- };
- #define NULLSOCK (struct socket *)0
-
- extern char hosts[];
-
- /* TCP port numbers */
- #define FTPD_PORT 20 /* FTP Data port */
- #define FTP_PORT 21 /* FTP Control port */
- #define TELNET_PORT 23 /* Telnet port */
- #define SMTP_PORT 25 /* Mail port */
- #define NNTP_PORT 119 /* Network News Port */
- #define FINGER_PORT 79 /* TCP port for `who' (finger) service */
- #define DOMAIN_PORT 53 /* Domain name server port */
-
- int32 aton(char *);
- char *inet_ntoa(int32);
- int32 resolve(char *);
- char *psocket(struct socket *);
- long htol(char *);
-