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51 lines
1.2 KiB
51 lines
1.2 KiB
#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "lookup.h"
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int __inet_aton(const char *, struct in_addr *);
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int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
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{
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struct in_addr a4;
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struct in6_addr a6;
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if (family != AF_INET6 && __inet_aton(name, &a4)>0) {
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memcpy(&buf[0].addr, &a4, sizeof a4);
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buf[0].family = AF_INET;
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buf[0].scopeid = 0;
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return 1;
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}
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if (family != AF_INET) {
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char tmp[64];
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char *p = strchr(name, '%'), *z;
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unsigned long long scopeid;
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if (p && p-name < 64) {
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memcpy(tmp, name, p-name);
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tmp[p-name] = 0;
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name = tmp;
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}
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if (inet_pton(AF_INET6, name, &a6)<=0) return 0;
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memcpy(&buf[0].addr, &a6, sizeof a6);
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buf[0].family = AF_INET6;
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if (p) {
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if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
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else z = p-1;
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if (*z) {
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if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
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!IN6_IS_ADDR_MC_LINKLOCAL(&a6))
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return EAI_NONAME;
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scopeid = if_nametoindex(p);
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if (!scopeid) return EAI_NONAME;
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}
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if (scopeid > UINT_MAX) return EAI_NONAME;
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buf[0].scopeid = scopeid;
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}
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return 1;
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}
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return 0;
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}
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