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author | Eduardo Chappa <echappa@gmx.com> | 2013-02-03 00:59:38 -0700 |
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committer | Eduardo Chappa <echappa@gmx.com> | 2013-02-03 00:59:38 -0700 |
commit | 094ca96844842928810f14844413109fc6cdd890 (patch) | |
tree | e60efbb980f38ba9308ccb4fb2b77b87bbc115f3 /imap/src/osdep/unix/ip4_unix.c | |
download | alpine-094ca96844842928810f14844413109fc6cdd890.tar.xz |
Initial Alpine Version
Diffstat (limited to 'imap/src/osdep/unix/ip4_unix.c')
-rw-r--r-- | imap/src/osdep/unix/ip4_unix.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/imap/src/osdep/unix/ip4_unix.c b/imap/src/osdep/unix/ip4_unix.c new file mode 100644 index 00000000..23d399e1 --- /dev/null +++ b/imap/src/osdep/unix/ip4_unix.c @@ -0,0 +1,184 @@ +/* ======================================================================== + * Copyright 1988-2006 University of Washington + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * + * ======================================================================== + */ + +/* + * Program: UNIX IPv4 routines + * + * Author: Mark Crispin + * Networks and Distributed Computing + * Computing & Communications + * University of Washington + * Administration Building, AG-44 + * Seattle, WA 98195 + * Internet: MRC@CAC.Washington.EDU + * + * Date: 18 December 2003 + * Last Edited: 30 August 2006 + */ + +#define SADRLEN sizeof (struct sockaddr) + +#define SADR4(sadr) ((struct sockaddr_in *) sadr) +#define SADR4LEN sizeof (struct sockaddr_in) +#define SADR4ADR(sadr) SADR4 (sadr)->sin_addr +#define ADR4LEN sizeof (struct in_addr) +#define SADR4PORT(sadr) SADR4 (sadr)->sin_port + + +/* IP abstraction layer */ + +char *ip_sockaddrtostring (struct sockaddr *sadr); +long ip_sockaddrtoport (struct sockaddr *sadr); +void *ip_stringtoaddr (char *text,size_t *len,int *family); +struct sockaddr *ip_newsockaddr (size_t *len); +struct sockaddr *ip_sockaddr (int family,void *adr,size_t adrlen, + unsigned short port,size_t *len); +char *ip_sockaddrtoname (struct sockaddr *sadr); +void *ip_nametoaddr (char *name,size_t *len,int *family,char **canonical, + void **next); + +/* Return IP address string from socket address + * Accepts: socket address + * Returns: IP address as name string + */ + +char *ip_sockaddrtostring (struct sockaddr *sadr) +{ + return (sadr->sa_family == PF_INET) ? + inet_ntoa (SADR4ADR (sadr)) : "NON-IPv4"; +} + + +/* Return port from socket address + * Accepts: socket address + * Returns: port number or -1 if can't determine it + */ + +long ip_sockaddrtoport (struct sockaddr *sadr) +{ + return (sadr->sa_family == PF_INET) ? ntohs (SADR4PORT (sadr)) : -1; +} + + +/* Return IP address from string + * Accepts: name string + * pointer to returned length + * pointer to returned address family + * Returns: address if valid, length and family updated, or NIL + */ + +void *ip_stringtoaddr (char *text,size_t *len,int *family) +{ + unsigned long adr; + struct in_addr *ret; + /* get address */ + if ((adr = inet_addr (text)) == -1) ret = NIL; + else { /* make in_addr */ + ret = (struct in_addr *) fs_get (*len = ADR4LEN); + *family = AF_INET; /* IPv4 */ + ret->s_addr = adr; /* set address */ + } + return (void *) ret; +} + +/* Create a maximum-size socket address + * Accepts: pointer to return maximum socket address length + * Returns: new, empty socket address of maximum size + */ + +struct sockaddr *ip_newsockaddr (size_t *len) +{ + return (struct sockaddr *) memset (fs_get (SADRLEN),0,*len = SADRLEN); +} + + +/* Stuff a socket address + * Accepts: address family + * IPv4 address + * length of address (always 4 in IPv4) + * port number + * pointer to return socket address length + * Returns: socket address or NIL if error + */ + +struct sockaddr *ip_sockaddr (int family,void *adr,size_t adrlen, + unsigned short port,size_t *len) +{ + struct sockaddr *sadr = ip_newsockaddr (len); + switch (family) { /* build socket address based upon family */ + case AF_INET: /* IPv4 */ + sadr->sa_family = PF_INET; + /* copy host address */ + memcpy (&SADR4ADR (sadr),adr,adrlen); + /* copy port number in network format */ + SADR4PORT (sadr) = htons (port); + *len = SADR4LEN; + break; + default: /* non-IP?? */ + sadr->sa_family = PF_UNSPEC; + break; + } + return sadr; +} + +/* Return name from socket address + * Accepts: socket address + * Returns: canonical name for that address or NIL if none + */ + +char *ip_sockaddrtoname (struct sockaddr *sadr) +{ + struct hostent *he; + return ((sadr->sa_family == PF_INET) && + (he = gethostbyaddr ((char *) &SADR4ADR (sadr),ADR4LEN,AF_INET))) ? + (char *) he->h_name : NIL; +} + + +/* Return address from name + * Accepts: name or NIL to return next address + * pointer to previous/returned length + * pointer to previous/returned address family + * pointer to previous/returned canonical name + * pointer to previous/return state for next-address calls + * Returns: address with length/family/canonical updated if needed, or NIL + */ + +void *ip_nametoaddr (char *name,size_t *len,int *family,char **canonical, + void **next) +{ + char **adl,tmp[MAILTMPLEN]; + struct hostent *he; + if (name) { /* first lookup? */ + /* yes, do case-independent lookup */ + if ((strlen (name) < MAILTMPLEN) && + (he = gethostbyname (lcase (strcpy (tmp,name))))) { + adl = he->h_addr_list; + if (len) *len = he->h_length; + if (family) *family = he->h_addrtype; + if (canonical) *canonical = (char *) he->h_name; + if (next) *next = (void *) adl; + } + else { /* error */ + adl = NIL; + if (len) *len = 0; + if (family) *family = 0; + if (canonical) *canonical = NIL; + if (next) *next = NIL; + } + } + /* return next in series */ + else if (next && (adl = (char **) *next)) *next = ++adl; + else adl = NIL; /* failure */ + return adl ? (void *) *adl : NIL; +} |