{"id":476,"date":"2019-05-02T12:47:49","date_gmt":"2019-05-02T03:47:49","guid":{"rendered":"https:\/\/www.oji-koji.com\/?p=476"},"modified":"2019-05-19T11:41:33","modified_gmt":"2019-05-19T02:41:33","slug":"%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%bc%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%81%a8ip%e3%82%a2%e3%83%89%e3%83%ac%e3%82%b9%e3%82%92%e5%88%97%e6%8c%99%e3%81%99%e3%82%8b%e3%83%97%e3%83%ad%e3%82%b0-2","status":"publish","type":"post","link":"https:\/\/www.oji-koji.com\/?p=476","title":{"rendered":"\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u5217\u6319\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0(EnumInterface Linux\u7248)2019\/05\/19\u66f4\u65b0"},"content":{"rendered":"\n

EnumInterface Linux\u7248
Linux\u7248\u3067\u306fgetifaddrs<\/a>\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210
\u30d5\u30a1\u30a4\u30eb\u2192\u65b0\u898f\u4f5c\u6210\u2192\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u2192\u30e1\u30a4\u30af\u30d5\u30a1\u30a4\u30eb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\uff1aEnumInterface
\u300c\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3059\u308b\u300d\u306e\u30c1\u30a7\u30c3\u30af\u3092\u5916\u3059\u3002<\/p>\n\n\n\n

(*)\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001VisualC++ for Linux\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30e0<\/a>
\u3092\u898b\u3066\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n

SockDB\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304b\u3089stdThread.cpp, stdThread.h, makefile\u3092\u30b3\u30d4\u30fc\u3057
\u65e2\u5b58\u306e\u9805\u76ee\u306e\u8ffd\u52a0\u3068\u3057\u3066\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u2192\u65b0\u898f\u306e\u9805\u76ee\u306e\u8ffd\u52a0\u3092\u9078\u3073EnumInterface.cpp\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u3010makefile\u306e\u5909\u66f4\u3011\nCC=g++ -g3 -O0\n#CC=g++\nPROGRAM=EnumInterface\nOBJS=EnumInterface.o stdThread.o\n\nSRCS=$(OBJS:%.o=%.cpp)\nINCLUDE=stdThread.h\nLFLAGS=-lpthread\n\n$(PROGRAM):$(OBJS) $(SRCS) $(INCLUDE)\n\t$(CC) -o $(PROGRAM) $(SRCS) $(LFLAGS)\n<\/p>\n\n\n\n

\u4f7f\u7528\u3059\u308b\u95a2\u6570<\/a>
int getifaddrs(struct ifaddrs **ifap); \/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3059\u308b
void freeifaddrs(struct ifaddrs *ifa); \/\/ \u53d6\u5f97\u3057\u305f\u60c5\u5831\u306e\u958b\u653e<\/p>\n\n\n\n

ifaddrs\u304b\u3089\u60c5\u5831\u3092\u8aad\u307f\u51fa\u3059\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002
ifaddrs\u69cb\u9020\u4f53\u306f\u3001\u30e1\u30f3\u30d0\u306b* ifa_next\u3092\u6301\u3064\u30ea\u30b9\u30c8\u306a\u306e\u3067\u3001\u3053\u308c\u304cNULL\u306b\u306a\u308b\u307e\u3067
\u9806\u756a\u306b\u305f\u3069\u3063\u3066\u3044\u304f\u3068\u53d6\u5f97\u3057\u305f\u60c5\u5831\u3092\u8aad\u307f\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\u3053\u3053\u3067\u4f7f\u7528\u3059\u308b\u30e1\u30f3\u30d0\u5909\u6570\u306f\u3001\u6b21\u306e\u3082\u306e\u3067\u3059\u3002
struct ifaddrs *ifa_next; \/\/ Next item in list
char *ifa_name; \/\/ Name of interface
struct sockaddr *ifa_addr; \/\/ Address of interface
struct sockaddr *ifa_netmask; \/\/ Netmask of interface<\/p>\n\n\n\n

\u3053\u3053\u3067\u4f7f\u7528\u3059\u308b\u65b0\u305f\u306a\u30bd\u30b1\u30c3\u30c8API<\/a>\uff08\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u304b\u3089\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u53d6\u5f97\u3059\u308b\uff09
unsigned int if_nametoindex(const char *ifname);<\/p>\n\n\n\n

\uff08*\uff09sockaddr\u306fIPv4(sockaddr_in), IPv6(sockaddr_in6)\u306e\u5171\u901a\u90e8\u5206\u3092
\u8868\u3059\u69cb\u9020\u4f53\u3067\u3059\u3002
IPv4\/IPv6\u5171\u901a\u3067\u4f7f\u7528\u3067\u304d\u308b\u30bd\u30b1\u30c3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u306f\u3001\u30a2\u30c9\u30ec\u30b9\u69cb\u9020\u4f53
\u3068\u3057\u3066\u3053\u308c\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

EnumInterface.cpp\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

#include “stdThread.h”\n#include <ifaddrs.h>\n#include <net\/if.h>\n\nint main(void)\n{\n int iRet = 0;\n struct ifaddrs *pifaddrs = NULL, *pifa;\n char szAddr[NI_MAXHOST], szMask[NI_MAXHOST];\n\n\/\/ \u30a2\u30c0\u30d7\u30bf\u30ea\u30b9\u30c8\u306e\u53d6\u5f97\n if (getifaddrs(&pifaddrs) == -1)\n goto L_END;\n\/\/ \u30a2\u30c0\u30d7\u30bf\u4e00\u89a7\u3092\u51fa\u529b\n pifa = pifaddrs;\n while(pifa)\n {\n\/\/ \u30a2\u30c9\u30ec\u30b9\u304c\u306a\u3044\u3082\u306e\u306f\u5bfe\u8c61\u5916\n if (pifa->ifa_addr == NULL)\n goto L_NEXT;\n\/\/ IPv4\/IPv6\u4ee5\u5916\u306f\u5bfe\u8c61\u5916\n if ((pifa->ifa_addr->sa_family != AF_INET) && (pifa->ifa_addr->sa_family != AF_INET6))\n goto L_NEXT;\n\n fprintf(stderr, “Name:%s\\n”, pifa->ifa_name);\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u524d\u304b\u3089\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u53d6\u5f97\u3059\u308b\n fprintf(stderr, “Index:%d\\n”, if_nametoindex(pifa->ifa_name));\n\n if (pifa->ifa_addr->sa_family == AF_INET) \/\/ IPv4\u306e\u6642IP\u30a2\u30c9\u30ec\u30b9\u3068\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3092\u8abf\u3079\u308b\n {\n inet_ntop(AF_INET, &((struct sockaddr_in *)pifa->ifa_addr)->sin_addr, szAddr, sizeof(szAddr));\n inet_ntop(AF_INET, &((struct sockaddr_in *)pifa->ifa_netmask)->sin_addr, szMask, sizeof(szMask));\n fprintf(stderr, ” IPv4: %s netmask %s\\n”, szAddr, szMask);\n }\n else if (pifa->ifa_addr->sa_family == AF_INET6) \/\/ IPv6\u306e\u6642IP\u30a2\u30c9\u30ec\u30b9\u3068\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3092\u8abf\u3079\u308b\n {\n inet_ntop(AF_INET6, &((struct sockaddr_in6 *)pifa->ifa_addr)->sin6_addr, szAddr, sizeof(szAddr));\n inet_ntop(AF_INET6, &((struct sockaddr_in6 *)pifa->ifa_netmask)->sin6_addr, szMask, sizeof(szMask));\n fprintf(stderr, ” IPv6: %s netmask %s\\n”, szAddr, szMask);\n }\n fprintf(stderr, “\\n”);\nL_NEXT:\n pifa = pifa->ifa_next;\n }\n iRet = 0;\nL_END:\n if (pifaddrs != NULL)\n freeifaddrs(pifaddrs);\n return(iRet);\n}<\/p>\n\n\n\n

\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u3001IP\u30a2\u30c9\u30ec\u30b9\u304c\u5217\u6319\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

$ .\/EnumInterface\nName:lo\nIndex:1\n IPv4: 127.0.0.1 netmask 255.0.0.0\n\nName:eth0\nIndex:2\n IPv4: 160.16.119.222 netmask 255.255.254.0\n\nName:lo\nIndex:1\n IPv6: ::1 netmask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff\n\nName:eth0\nIndex:2\n IPv6: 2001:e42:102:1535:160:16:119:222 netmask ffff:ffff:ffff:ffff::\n\nName:eth0\nIndex:2\n IPv6: fe80::9ea3:baff:fe01:f1ec netmask ffff:ffff:ffff:ffff::\n<\/p>\n\n\n\n

\u3010\u53c2\u8003\u3011
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8EnumInterface for Linux(zip)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

EnumInterface Linux\u7248 Linux\u7248\u3067\u306fgetifaddrs\u3092\u4f7f\u3044\u307e\u3059\u3002 \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210 \u30d5\u30a1\u30a4\u30eb\u2192\u65b0\u898f\u4f5c\u6210\u2192\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u2192\u30e1\u30a4\u30af\u30d5\u30a1\u30a4\u30eb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8 \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\uff1aEnumInterf […]<\/p>\n","protected":false},"author":1,"featured_media":129,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"","_original_post":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-476","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-networkprograming","ja"],"_links":{"self":[{"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/posts\/476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=476"}],"version-history":[{"count":41,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/posts\/476\/revisions"}],"predecessor-version":[{"id":752,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/posts\/476\/revisions\/752"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=\/wp\/v2\/media\/129"}],"wp:attachment":[{"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oji-koji.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}