Added dropin replacements for get*info and helper functions.
This commit is contained in:
Ivo Timmermans
parent
aabe59f630
commit
2ec5b5f862
2 changed files with 236 additions and 2 deletions
187
lib/dropin.c
187
lib/dropin.c
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@ -17,7 +17,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: dropin.c,v 1.1.2.6 2001/11/05 19:09:08 guus Exp $
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$Id: dropin.c,v 1.1.2.7 2001/11/16 17:36:56 zarq Exp $
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*/
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#include "config.h"
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@ -169,3 +169,188 @@ int asprintf(char **buf, const char *fmt, ...)
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return status;
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}
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#endif
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/*
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* fake library for ssh
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*
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* This file is included in getaddrinfo.c and getnameinfo.c.
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* See getaddrinfo.c and getnameinfo.c.
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*/
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/* $Id: dropin.c,v 1.1.2.7 2001/11/16 17:36:56 zarq Exp $ */
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/* for old netdb.h */
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#ifndef EAI_NODATA
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#define EAI_NODATA 1
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#define EAI_MEMORY 2
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#endif
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/*
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* fake library for ssh
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*
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* This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
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* These funtions are defined in rfc2133.
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*
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* But these functions are not implemented correctly. The minimum subset
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* is implemented for ssh use only. For exapmle, this routine assumes
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* that ai_family is AF_INET. Don't use it for another purpose.
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*/
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#ifndef HAVE_GAI_STRERROR
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char *gai_strerror(int ecode)
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{
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switch (ecode) {
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case EAI_NODATA:
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return "no address associated with hostname.";
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case EAI_MEMORY:
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return "memory allocation failure.";
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default:
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return "unknown error.";
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}
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}
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#endif /* !HAVE_GAI_STRERROR */
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#ifndef HAVE_FREEADDRINFO
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void freeaddrinfo(struct addrinfo *ai)
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{
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struct addrinfo *next;
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do {
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next = ai->ai_next;
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free(ai);
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} while (NULL != (ai = next));
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}
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#endif /* !HAVE_FREEADDRINFO */
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#ifndef HAVE_GETADDRINFO
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static struct addrinfo *malloc_ai(int port, u_long addr)
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{
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struct addrinfo *ai;
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ai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
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if (ai == NULL)
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return(NULL);
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memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
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ai->ai_addr = (struct sockaddr *)(ai + 1);
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/* XXX -- ssh doesn't use sa_len */
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ai->ai_addrlen = sizeof(struct sockaddr_in);
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ai->ai_addr->sa_family = ai->ai_family = AF_INET;
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((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
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((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
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return(ai);
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}
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int getaddrinfo(const char *hostname, const char *servname,
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const struct addrinfo *hints, struct addrinfo **res)
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{
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struct addrinfo *cur, *prev = NULL;
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struct hostent *hp;
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struct in_addr in;
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int i, port;
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if (servname)
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port = htons(atoi(servname));
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else
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port = 0;
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if (hints && hints->ai_flags & AI_PASSIVE) {
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if (NULL != (*res = malloc_ai(port, htonl(0x00000000))))
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return 0;
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else
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return EAI_MEMORY;
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}
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if (!hostname) {
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if (NULL != (*res = malloc_ai(port, htonl(0x7f000001))))
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return 0;
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else
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return EAI_MEMORY;
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}
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if (inet_aton(hostname, &in)) {
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if (NULL != (*res = malloc_ai(port, in.s_addr)))
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return 0;
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else
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return EAI_MEMORY;
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}
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hp = gethostbyname(hostname);
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if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
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for (i = 0; hp->h_addr_list[i]; i++) {
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cur = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
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if (cur == NULL) {
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if (*res)
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freeaddrinfo(*res);
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return EAI_MEMORY;
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}
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if (prev)
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prev->ai_next = cur;
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else
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*res = cur;
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prev = cur;
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}
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return 0;
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}
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return EAI_NODATA;
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}
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#endif /* !HAVE_GETADDRINFO */
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/*
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* fake library for ssh
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*
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* This file includes getnameinfo().
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* These funtions are defined in rfc2133.
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*
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* But these functions are not implemented correctly. The minimum subset
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* is implemented for ssh use only. For exapmle, this routine assumes
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* that ai_family is AF_INET. Don't use it for another purpose.
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*/
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#ifndef HAVE_GETNAMEINFO
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int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
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size_t hostlen, char *serv, size_t servlen, int flags)
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{
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struct sockaddr_in *sin = (struct sockaddr_in *)sa;
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struct hostent *hp;
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char tmpserv[16];
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if (serv) {
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snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
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if (strlen(tmpserv) >= servlen)
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return EAI_MEMORY;
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else
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strcpy(serv, tmpserv);
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}
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if (host) {
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if (flags & NI_NUMERICHOST) {
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if (strlen(inet_ntoa(sin->sin_addr)) >= hostlen)
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return EAI_MEMORY;
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strcpy(host, inet_ntoa(sin->sin_addr));
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return 0;
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} else {
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hp = gethostbyaddr((char *)&sin->sin_addr,
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sizeof(struct in_addr), AF_INET);
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if (hp == NULL)
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return EAI_NODATA;
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if (strlen(hp->h_name) >= hostlen)
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return EAI_MEMORY;
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strcpy(host, hp->h_name);
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return 0;
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}
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}
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return 0;
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}
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#endif /* !HAVE_GETNAMEINFO */
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51
lib/dropin.h
51
lib/dropin.h
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@ -17,7 +17,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: dropin.h,v 1.1.2.4 2001/11/05 19:06:07 guus Exp $
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$Id: dropin.h,v 1.1.2.5 2001/11/16 17:37:08 zarq Exp $
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*/
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#ifndef __DROPIN_H__
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@ -35,4 +35,53 @@ extern char* get_current_dir_name(void);
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extern int asprintf(char **, const char *, ...);
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#endif
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#ifndef HAVE_STRUCT_ADDRINFO
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struct addrinfo {
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int ai_flags; /* AI_PASSIVE, AI_CANONNAME */
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int ai_family; /* PF_xxx */
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int ai_socktype; /* SOCK_xxx */
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int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
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size_t ai_addrlen; /* length of ai_addr */
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char *ai_canonname; /* canonical name for hostname */
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struct sockaddr *ai_addr; /* binary address */
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struct addrinfo *ai_next; /* next structure in linked list */
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};
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#endif /* !HAVE_STRUCT_ADDRINFO */
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#ifndef HAVE_GETADDRINFO
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int getaddrinfo(const char *hostname, const char *servname,
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const struct addrinfo *hints, struct addrinfo **res);
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#endif /* !HAVE_GETADDRINFO */
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#ifndef HAVE_GAI_STRERROR
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char *gai_strerror(int ecode);
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#endif /* !HAVE_GAI_STRERROR */
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#ifndef HAVE_FREEADDRINFO
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void freeaddrinfo(struct addrinfo *ai);
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#endif /* !HAVE_FREEADDRINFO */
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#ifndef HAVE_GETNAMEINFO
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int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
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size_t hostlen, char *serv, size_t servlen, int flags);
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#endif /* !HAVE_GETNAMEINFO */
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#ifndef NI_MAXSERV
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# define NI_MAXSERV 32
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#endif /* !NI_MAXSERV */
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#ifndef NI_MAXHOST
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# define NI_MAXHOST 1025
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#endif /* !NI_MAXHOST */
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#ifndef AI_PASSIVE
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# define AI_PASSIVE 1
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# define AI_CANONNAME 2
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#endif
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#ifndef NI_NUMERICHOST
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# define NI_NUMERICHOST 2
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# define NI_NAMEREQD 4
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# define NI_NUMERICSERV 8
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#endif
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#endif /* __DROPIN_H__ */
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