65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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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 functions 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 example, 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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#include "system.h"
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#include "fake-getnameinfo.h"
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#include "fake-getaddrinfo.h"
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#if !HAVE_DECL_GETNAMEINFO
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int getnameinfo(const struct sockaddr *sa, size_t salen, char *host, size_t hostlen, char *serv, size_t servlen, int flags) {
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struct sockaddr_in *sin = (struct sockaddr_in *)sa;
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struct hostent *hp;
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int len;
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if(sa->sa_family != AF_INET) {
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return EAI_FAMILY;
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}
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if(serv && servlen) {
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len = snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
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if(len < 0 || len >= servlen) {
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return EAI_MEMORY;
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}
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}
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if(!host || !hostlen) {
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return 0;
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}
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if(flags & NI_NUMERICHOST) {
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len = snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
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if(len < 0 || len >= hostlen) {
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return EAI_MEMORY;
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}
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return 0;
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}
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hp = gethostbyaddr((char *)&sin->sin_addr, sizeof(struct in_addr), AF_INET);
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if(!hp || !hp->h_name || !hp->h_name[0]) {
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return EAI_NODATA;
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}
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len = snprintf(host, hostlen, "%s", hp->h_name);
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if(len < 0 || len >= hostlen) {
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return EAI_MEMORY;
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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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