1 | #include <sys/socket.h>
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2 | #include <netinet/in.h>
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3 | #include <netdb.h>
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4 | #include <net/if.h>
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5 | #include <arpa/inet.h>
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6 | #include <limits.h>
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7 | #include <stdlib.h>
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8 | #include <string.h>
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9 | #include <ctype.h>
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10 | #include "lookup.h"
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11 |
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12 | int __inet_aton(const char *, struct in_addr *);
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13 |
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14 | int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
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15 | {
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16 | struct in_addr a4;
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17 | struct in6_addr a6;
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18 | if (__inet_aton(name, &a4) > 0) {
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19 | if (family == AF_INET6) /* wrong family */
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20 | return EAI_NONAME;
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21 | memcpy(&buf[0].addr, &a4, sizeof a4);
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22 | buf[0].family = AF_INET;
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23 | buf[0].scopeid = 0;
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24 | return 1;
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25 | }
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26 |
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27 | char tmp[64];
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28 | char *p = strchr(name, '%'), *z;
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29 | unsigned long long scopeid = 0;
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30 | if (p && p-name < 64) {
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31 | memcpy(tmp, name, p-name);
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32 | tmp[p-name] = 0;
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33 | name = tmp;
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34 | }
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35 |
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36 | if (inet_pton(AF_INET6, name, &a6) <= 0)
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37 | return 0;
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38 | if (family == AF_INET) /* wrong family */
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39 | return EAI_NONAME;
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40 |
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41 | memcpy(&buf[0].addr, &a6, sizeof a6);
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42 | buf[0].family = AF_INET6;
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43 | if (p) {
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44 | if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
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45 | else z = p-1;
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46 | if (*z) {
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47 | if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
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48 | !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
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49 | return EAI_NONAME;
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50 | scopeid = if_nametoindex(p);
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51 | if (!scopeid) return EAI_NONAME;
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52 | }
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53 | if (scopeid > UINT_MAX) return EAI_NONAME;
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54 | }
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55 | buf[0].scopeid = scopeid;
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56 | return 1;
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57 | }
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