Last change
on this file since 413 was 398, checked in by coas-nagasima, 5 years ago |
mbedTLS版Azure IoT Hub接続サンプルのソースコードを追加
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File size:
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1 | #define _GNU_SOURCE
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2 | #include <sys/socket.h>
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3 | #include <netinet/in.h>
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4 | #include <netdb.h>
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5 | #include <inttypes.h>
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6 | #include <errno.h>
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7 | #include <string.h>
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8 | #include <stdlib.h>
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9 | #include "lookup.h"
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10 |
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11 | #define ALIGN (sizeof(struct { char a; char *b; }) - sizeof(char *))
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12 |
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13 | int getservbyname_r(const char *name, const char *prots,
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14 | struct servent *se, char *buf, size_t buflen, struct servent **res)
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15 | {
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16 | struct service servs[MAXSERVS];
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17 | int cnt, proto, align;
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18 |
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19 | *res = 0;
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20 |
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21 | /* Don't treat numeric port number strings as service records. */
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22 | char *end = "";
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23 | strtoul(name, &end, 10);
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24 | if (!*end) return ENOENT;
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25 |
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26 | /* Align buffer */
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27 | align = -(uintptr_t)buf & ALIGN-1;
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28 | if (buflen < 2*sizeof(char *)+align)
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29 | return ERANGE;
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30 | buf += align;
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31 |
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32 | if (!prots) proto = 0;
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33 | else if (!strcmp(prots, "tcp")) proto = IPPROTO_TCP;
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34 | else if (!strcmp(prots, "udp")) proto = IPPROTO_UDP;
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35 | else return EINVAL;
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36 |
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37 | cnt = __lookup_serv(servs, name, proto, 0, 0);
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38 | if (cnt<0) switch (cnt) {
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39 | case EAI_MEMORY:
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40 | case EAI_SYSTEM:
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41 | return ENOMEM;
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42 | default:
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43 | return ENOENT;
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44 | }
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45 |
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46 | se->s_name = (char *)name;
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47 | se->s_aliases = (void *)buf;
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48 | se->s_aliases[0] = se->s_name;
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49 | se->s_aliases[1] = 0;
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50 | se->s_port = htons(servs[0].port);
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51 | se->s_proto = servs[0].proto == IPPROTO_TCP ? "tcp" : "udp";
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52 |
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53 | *res = se;
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54 | return 0;
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55 | }
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