锘??xml version="1.0" encoding="utf-8" standalone="yes"?> 甯哥敤綾誨瀷鐨勫畾涔夛細 /* /* #define AF_MAX聽聽聽聽聽聽聽聽聽 32 /* #define PF_MAX聽聽聽聽聽聽聽聽聽 AF_MAX
Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=541158 鍑芥暟錛?br />u_long htonl(u_long hostlong)
unsigned long inet_addr(const char* cp);
int WSAStartup(WORD wVersionRequested,LPWSADATA lpWSAData);
int gethostname(char* name,int namelen);
聽if ( WSAStartup(0x0202,&data) != 0 ) 聽if( gethostname ( name, sizeof(name)) == 0) 聽if((phostinfo1 = gethostbyname("bbs.whnet.edu.cn")) != NULL) 聽for (addrPtr = (struct in_addr **)phostinfo->h_addr_list;*addrPtr;addrPtr++)
struct HOSTENT* FAR gethostbyaddr(const char* addr,int len,int type);
int getsockname(SOCKET s,struct sockaddr* name,int* namelen);
鑷充簬bind,listen,accept,recv,send絳夊悗闈㈠select妯″瀷鐨勬椂鍊欏啀浠旂粏鐮旂┒銆?/p>
Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=551760 鍚屾 寮傛 闈為樆濉?/strong> 銆銆瀵硅薄鐨勯樆濉炴ā寮忓拰闃誨鍑芥暟璋冪敤
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浣滆咃細 涓滃寳澶у縐︾殗宀涘垎鏍¤蔣浠朵腑蹇冩妧鏈爺鍙戦儴 鏁寕鍗?/td>
1銆?nbsp;寮曡█
Linux鐨勫叴璧峰彲浠ヨ鏄疘nternet鍒涢犵殑涓涓榪廣侺inux浣滀負涓涓畬鍏ㄥ紑鏀懼叾鍘熶唬鐮佺殑鍏嶈垂鐨勮嚜鐢辮蔣浠訛紝鍏煎浜嗗悇縐峌NIX鏍囧噯錛堝POSIX銆乁NIX System V 鍜?nbsp;BSD UNIX 絳夛級鐨勫鐢ㄦ埛銆佸浠誨姟鐨勫叿鏈夊鏉傚唴鏍哥殑鎿嶄綔緋葷粺銆傚湪涓浗錛岄殢鐫Internet鐨勬櫘鍙婏紝涓鎵逛富瑕佷互楂樼瓑闄㈡牎鐨勫鐢熷拰ISP鐨勬妧鏈漢鍛樼粍鎴愮殑Linux鐖卞ソ鑰呴槦浼嶅凡緇忚摤鍕冩垚闀胯搗鏉ャ傝秺鏉ヨ秺澶氱殑緙栫▼鐖卞ソ鑰呬篃閫愭笎閰風埍涓婅繖涓紭縐鐨勮嚜鐢辮蔣浠躲傛湰鏂囦粙緇嶄簡Linux涓婼ocket鐨勫熀鏈蹇靛拰鍑芥暟璋冪敤銆?br>
2銆?nbsp;浠涔堟槸Socket
Socket錛堝鎺ュ瓧錛夋槸閫氳繃鏍囧噯鐨刄NIX鏂囦歡鎻忚堪絎﹀拰鍏跺畠紼嬪簭閫氳鐨勪竴涓柟娉曘傛瘡涓涓鎺ュ瓧閮界敤涓涓崐鐩稿叧鎻忚堪錛歿鍗忚錛屾湰鍦板湴鍧銆佹湰鍦扮鍙鏉ヨ〃紺猴紱涓涓畬鏁寸殑濂楁帴瀛楀垯鐢ㄤ竴涓浉鍏蟲弿榪幫細{鍗忚錛屾湰鍦板湴鍧銆佹湰鍦扮鍙c佽繙紼嬪湴鍧銆佽繙紼嬬鍙錛屾瘡涓涓鎺ュ瓧閮芥湁涓涓湰鍦扮殑鐢辨搷浣滅郴緇熷垎閰嶇殑鍞竴鐨勫鎺ュ瓧鍙楓?br>
3銆?nbsp;Socket鐨勪笁縐嶇被鍨?br>錛?錛?nbsp;嫻佸紡Socket錛圫OCK_STREAM錛?br>嫻佸紡濂楁帴瀛楁彁渚涘彲闈犵殑銆侀潰鍚戣繛鎺ョ殑閫氫俊嫻侊紱瀹冧嬌鐢═CP鍗忚錛屼粠鑰屼繚璇佷簡鏁版嵁浼犺緭鐨勬紜у拰欏哄簭鐨勩?br>錛?錛?nbsp;鏁版嵁鎶ocket錛圫OCK_DGRAM錛?br>鏁版嵁鎶ュ鎺ュ瓧瀹氫箟浜嗕竴縐嶆棤榪炴帴鐨勬湇鍔★紝鏁版嵁閫氳繃鐩鎬簰鐙珛鐨勬姤鏂囪繘琛屼紶杈擄紝鏄棤搴忕殑錛屽茍涓斾笉淇濊瘉鍙潬銆佹棤宸敊銆傚畠浣跨敤鏁版嵁鎶ュ崗璁甎DP
錛?錛?nbsp;鍘熷Socket
鍘熷濂楁帴瀛楀厑璁稿搴曞眰鍗忚濡侷P鎴朓CMP鐩存帴璁塊棶錛屽畠鍔熻兘寮哄ぇ浣嗕嬌鐢ㄨ緝涓轟笉渚匡紝涓昏鐢ㄤ簬涓浜涘崗璁殑寮鍙戙?br>
4銆?nbsp;鍒╃敤濂楁帴瀛楀彂閫佹暟鎹?br>1銆?nbsp;瀵逛簬嫻佸紡濂楁帴瀛楃敤緋葷粺璋冪敤send錛堬級鏉ュ彂閫佹暟鎹?br>2銆?nbsp;瀵逛簬鏁版嵁鎶ュ鎺ュ瓧錛屽垯闇瑕佽嚜宸卞厛鍔犱竴涓俊鎭ご錛岀劧鍚庤皟鐢╯endto錛堬級鍑芥暟鎶婃暟鎹彂閫佸嚭鍘匯?br>
5銆?nbsp;Linux涓璖ocket鐨勬暟鎹粨鏋?br>錛?錛?nbsp;struct sockaddr { //鐢ㄤ簬瀛樺偍濂楁帴瀛楀湴鍧
unsigned short sa_family錛?/鍦板潃綾誨瀷
char sa_data[14]錛?nbsp;//14瀛楄妭鐨勫崗璁湴鍧
}錛?br>錛?錛?nbsp;struct sockaddr_in{ //in 浠h〃internet
short int sin_family錛?nbsp;//internet鍗忚鏃?br>unsigned short int sin_port錛?/绔彛鍙鳳紝蹇呴』鏄綉緇滃瓧鑺傞『搴?br>struct in_addr sin_addr錛?/internet鍦板潃錛屽繀欏繪槸緗戠粶瀛楄妭欏哄簭
unsigned char sin_zero錛?/娣?錛堝拰struct sockaddr涓鏍峰ぇ灝?br>}錛?br>錛?錛?nbsp;struct in_addr{
unsigned long s_addr錛?br>}錛?br>
6銆?nbsp;緗戠粶瀛楄妭欏哄簭鍙婂叾杞崲鍑芥暟
錛?錛?nbsp;緗戠粶瀛楄妭欏哄簭
姣忎竴鍙版満鍣ㄥ唴閮ㄥ鍙橀噺鐨勫瓧鑺傚瓨鍌ㄩ『搴忎笉鍚岋紝鑰岀綉緇滀紶杈撶殑鏁版嵁鏄竴瀹氳緇熶竴欏哄簭鐨勩傛墍浠ュ鍐呴儴瀛楄妭琛ㄧず欏哄簭涓庣綉緇滃瓧鑺傞『搴忎笉鍚岀殑鏈哄櫒錛屼竴瀹氳瀵規暟鎹繘琛岃漿鎹紝浠庣▼搴忕殑鍙Щ妞嶆ц姹傛潵璁詫紝灝辯畻鏈満鐨勫唴閮ㄥ瓧鑺傝〃紺洪『搴忎笌緗戠粶瀛楄妭欏哄簭鐩稿悓涔熷簲璇ュ湪浼犺緭鏁版嵁浠ュ墠鍏堣皟鐢ㄦ暟鎹漿鎹㈠嚱鏁幫紝浠ヤ究紼嬪簭縐繪鍒板叾瀹冩満鍣ㄤ笂鍚庤兘姝g‘鎵ц銆傜湡姝h漿鎹㈣繕鏄笉杞崲鏄敱緋葷粺鍑芥暟鑷繁鏉ュ喅瀹氱殑銆?br>錛?錛?nbsp;鏈夊叧鐨勮漿鎹㈠嚱鏁?br>* unsigned short int htons錛坲nsigned short int hostshort錛夛細
涓繪満瀛楄妭欏哄簭杞崲鎴愮綉緇滃瓧鑺傞『搴忥紝瀵規棤絎﹀彿鐭瀷榪涜鎿嶄綔4bytes
* unsigned long int htonl錛坲nsigned long int hostlong錛夛細
涓繪満瀛楄妭欏哄簭杞崲鎴愮綉緇滃瓧鑺傞『搴忥紝瀵規棤絎﹀彿闀垮瀷榪涜鎿嶄綔8bytes
* unsigned short int ntohs錛坲nsigned short int netshort錛夛細
緗戠粶瀛楄妭欏哄簭杞崲鎴愪富鏈哄瓧鑺傞『搴忥紝瀵規棤絎﹀彿鐭瀷榪涜鎿嶄綔4bytes
* unsigned long int ntohl錛坲nsigned long int netlong錛夛細
緗戠粶瀛楄妭欏哄簭杞崲鎴愪富鏈哄瓧鑺傞『搴忥紝瀵規棤絎﹀彿闀垮瀷榪涜鎿嶄綔8bytes
娉細浠ヤ笂鍑芥暟鍘熷瀷瀹氫箟鍦╪etinet/in.h閲?br>
7銆?nbsp;IP鍦板潃杞崲
鏈変笁涓嚱鏁板皢鏁板瓧鐐瑰艦寮忚〃紺虹殑瀛楃涓睮P鍦板潃涓?2浣嶇綉緇滃瓧鑺傞『搴忕殑浜岃繘鍒跺艦寮忕殑IP鍦板潃榪涜杞崲
錛?錛?nbsp;unsigned long int inet_addr(const char * cp)錛氳鍑芥暟鎶婁竴涓敤鏁板瓧鍜岀偣琛ㄧず鐨処P鍦板潃鐨勫瓧絎︿覆杞崲鎴愪竴涓棤絎﹀彿闀挎暣鍨嬶紝濡傦細struct sockaddr_in ina
ina.sin_addr.s_addr=inet_addr("202.206.17.101")
璇ュ嚱鏁版垚鍔熸椂錛氳繑鍥炶漿鎹㈢粨鏋滐紱澶辮觸鏃惰繑鍥炲父閲廔NADDR_NONE錛岃甯擱噺=-1錛屼簩榪涘埗鐨勬棤絎﹀彿鏁存暟-1鐩稿綋浜?55.255.255.255錛岃繖鏄竴涓箍鎾湴鍧錛屾墍浠ュ湪紼嬪簭涓皟鐢╥ner_addr錛堬級鏃訛紝涓瀹氳浜轟負鍦板璋冪敤澶辮觸榪涜澶勭悊銆傜敱浜庤鍑芥暟涓嶈兘澶勭悊騫挎挱鍦板潃錛屾墍浠ュ湪紼嬪簭涓簲璇ヤ嬌鐢ㄥ嚱鏁癷net_aton錛堬級銆?br>錛?錛塱nt inet_aton錛坈onst char * cp,struct in_addr * inp錛夛細姝ゅ嚱鏁板皢瀛楃涓插艦寮忕殑IP鍦板潃杞崲鎴愪簩榪涘埗褰㈠紡鐨処P鍦板潃錛涙垚鍔熸椂榪斿洖1錛屽惁鍒欒繑鍥?錛岃漿鎹㈠悗鐨処P鍦板潃瀛樺偍鍦ㄥ弬鏁癷np涓?br>錛?錛?nbsp;char * inet_ntoa錛坰truct in-addr in錛夛細灝?2浣嶄簩榪涘埗褰㈠紡鐨処P鍦板潃杞崲涓烘暟瀛楃偣褰㈠紡鐨処P鍦板潃錛岀粨鏋滃湪鍑芥暟榪斿洖鍊間腑榪斿洖錛岃繑鍥炵殑鏄竴涓寚鍚戝瓧絎︿覆鐨勬寚閽堛?br>
8銆?nbsp;瀛楄妭澶勭悊鍑芥暟
Socket鍦板潃鏄瀛楄妭鏁版嵁錛屼笉鏄互絀哄瓧絎︾粨灝劇殑錛岃繖鍜孋璇█涓殑瀛楃涓叉槸涓嶅悓鐨勩侺inux鎻愪緵浜嗕袱緇勫嚱鏁版潵澶勭悊澶氬瓧鑺傛暟鎹紝涓緇勪互b錛坆yte錛夊紑澶達紝鏄拰BSD緋葷粺鍏煎鐨勫嚱鏁幫紝鍙︿竴緇勪互mem錛堝唴瀛橈級寮澶達紝鏄疉NSI C鎻愪緵鐨勫嚱鏁般?br>浠寮澶寸殑鍑芥暟鏈夛細
錛?錛?nbsp;void bzero錛坴oid * s,int n錛夛細灝嗗弬鏁皊鎸囧畾鐨勫唴瀛樼殑鍓峮涓瓧鑺傝緗負0錛岄氬父瀹冪敤鏉ュ皢濂楁帴瀛楀湴鍧娓?銆?br>錛?錛?nbsp;void bcopy錛坈onst void * src錛寁oid * dest錛宨nt n錛夛細浠庡弬鏁皊rc鎸囧畾鐨勫唴瀛樺尯鍩熸嫹璐濇寚瀹氭暟鐩殑瀛楄妭鍐呭鍒板弬鏁癲est鎸囧畾鐨勫唴瀛樺尯鍩熴?br>錛?錛?nbsp;int bcmp錛坈onst void * s1錛宑onst void * s2錛宨nt n錛夛細姣旇緝鍙傛暟s1鎸囧畾鐨勫唴瀛樺尯鍩熷拰鍙傛暟s2鎸囧畾鐨勫唴瀛樺尯鍩熺殑鍓峮涓瓧鑺傚唴瀹癸紝濡傛灉鐩稿悓鍒欒繑鍥?錛屽惁鍒欒繑鍥為潪0銆?br>娉細浠ヤ笂鍑芥暟鐨勫師鍨嬪畾涔夊湪strings.h涓?br>浠em寮澶寸殑鍑芥暟鏈夛細
錛?錛?nbsp;void * memset錛坴oid * s錛宨nt c錛宻ize_t n錛夛細灝嗗弬鏁皊鎸囧畾鐨勫唴瀛樺尯鍩熺殑鍓峮涓瓧鑺傝緗負鍙傛暟c鐨勫唴瀹廣?br>錛?錛?nbsp;void * memcpy錛坴oid * dest錛宑onst void * src錛宻ize_t n錛夛細鍔熻兘鍚宐copy錛堬級錛屽尯鍒細鍑芥暟bcopy錛堬級鑳藉鐞嗗弬鏁皊rc鍜屽弬鏁癲est鎵鎸囧畾鐨勫尯鍩熸湁閲嶅彔鐨勬儏鍐碉紝memcpy錛堬級鍒欎笉鑳姐?br>錛?錛?nbsp;int memcmp錛坈onst void * s1錛宑onst void * s2錛宻ize_t n錛夛細姣旇緝鍙傛暟s1鍜屽弬鏁皊2鎸囧畾鍖哄煙鐨勫墠n涓瓧鑺傚唴瀹癸紝濡傛灉鐩稿悓鍒欒繑鍥?錛屽惁鍒欒繑鍥為潪0銆?br>娉細浠ヤ笂鍑芥暟鐨勫師鍨嬪畾涔夊湪string.h涓?br>
9銆?nbsp;鍩烘湰濂楁帴瀛楀嚱鏁?br>錛?錛?nbsp;socket錛堬級
#include< sys/types.h>
#include< sys/socket.h>
int socket(int domain錛宨nt type錛宨nt protocol)
鍙傛暟domain鎸囧畾瑕佸垱寤虹殑濂楁帴瀛楃殑鍗忚鏃忥紝鍙互鏄涓嬪鹼細
AF_UNIX //UNIX鍩熷崗璁棌錛屾湰鏈虹殑榪涚▼闂撮氳鏃朵嬌鐢?br>AF_INET //Internet鍗忚鏃忥紙TCP/IP錛?br>AF_ISO //ISO鍗忚鏃?br>鍙傛暟type鎸囧畾濂楁帴瀛楃被鍨嬶紝鍙互鏄涓嬪鹼細
SOCK_STREAM //嫻佸鎺ュ瓧錛岄潰鍚戣繛鎺ョ殑鍜屽彲闈犵殑閫氫俊綾誨瀷
SOCK_DGRAM //鏁版嵁鎶ュ鎺ュ瓧錛岄潪闈㈠悜榪炴帴鐨勫拰涓嶅彲闈犵殑閫氫俊綾誨瀷
SOCK_RAW //鍘熷濂楁帴瀛楋紝鍙Internet鍗忚鏈夋晥錛屽彲浠ョ敤鏉ョ洿鎺ヨ闂甀P鍗忚
鍙傛暟protocol閫氬父璁劇疆鎴?錛岃〃紺轟嬌鐢ㄩ粯璁ゅ崗璁紝濡侷nternet鍗忚鏃忕殑嫻佸鎺ュ瓧浣跨敤TCP鍗忚錛岃屾暟鎹姤濂楁帴瀛椾嬌鐢║DP鍗忚銆傚綋濂楁帴瀛楁槸鍘熷濂楁帴瀛楃被鍨嬫椂錛岄渶瑕佹寚瀹氬弬鏁皃rotocol錛屽洜涓哄師濮嬪鎺ュ瓧瀵瑰縐嶅崗璁湁鏁堬紝濡侷CMP鍜孖GMP絳夈?br>Linux緋葷粺涓垱寤轟竴涓鎺ュ瓧鐨勬搷浣滀富瑕佹槸錛氬湪鍐呮牳涓垱寤轟竴涓鎺ュ瓧鏁版嵁緇撴瀯錛岀劧鍚庤繑鍥炰竴涓鎺ュ瓧鎻忚堪絎︽爣璇嗚繖涓鎺ュ瓧鏁版嵁緇撴瀯銆傝繖涓鎺ュ瓧鏁版嵁緇撴瀯鍖呭惈榪炴帴鐨勫悇縐嶄俊鎭紝濡傚鏂瑰湴鍧銆乀CP鐘舵佷互鍙婂彂閫佸拰鎺ユ敹緙撳啿鍖虹瓑絳夛紝TCP鍗忚鏍規嵁榪欎釜濂楁帴瀛楁暟鎹粨鏋勭殑鍐呭鏉ユ帶鍒惰繖鏉¤繛鎺ャ?br>錛?錛?nbsp;鍑芥暟connect錛堬級
#include< sys/types.h>
#include< sys/socket.h>
int connect錛坕nt sockfd錛宻truct sockaddr * servaddr錛宨nt addrlen錛?br>鍙傛暟sockfd鏄嚱鏁皊ocket榪斿洖鐨勫鎺ュ瓧鎻忚堪絎︼紱鍙傛暟servaddr鎸囧畾榪滅▼鏈嶅姟鍣ㄧ殑濂楁帴瀛楀湴鍧錛屽寘鎷湇鍔″櫒鐨処P鍦板潃鍜岀鍙e彿錛涘弬鏁癮ddrlen鎸囧畾榪欎釜濂楁帴瀛楀湴鍧鐨勯暱搴︺傛垚鍔熸椂榪斿洖0錛屽惁鍒欒繑鍥?1錛屽茍璁劇疆鍏ㄥ眬鍙橀噺涓轟互涓嬩換浣曚竴縐嶉敊璇被鍨嬶細ETIMEOUT銆丒CONNREFUSED銆丒HOSTUNREACH鎴朎NETUNREACH銆?br>鍦ㄨ皟鐢ㄥ嚱鏁癱onnect涔嬪墠錛屽鎴鋒満闇瑕佹寚瀹氭湇鍔″櫒榪涚▼鐨勫鎺ュ瓧鍦板潃銆傚鎴鋒満涓鑸笉闇瑕佹寚瀹氳嚜宸辯殑濂楁帴瀛楀湴鍧錛圛P鍦板潃鍜岀鍙e彿錛夛紝緋葷粺浼氳嚜鍔ㄤ粠1024鑷?000鐨勭鍙e彿鑼冨洿鍐呬負瀹冮夋嫨涓涓湭鐢ㄧ殑绔彛鍙鳳紝鐒跺悗浠ヨ繖涓鍙e彿鍜屾湰鏈虹殑IP鍦板潃濉厖榪欎釜濂楁帴瀛楀湴鍧銆?br>瀹㈡埛鏈鴻皟鐢ㄥ嚱鏁癱onnect鏉ヤ富鍔ㄥ緩绔嬭繛鎺ャ傝繖涓嚱鏁板皢鍚姩TCP鍗忚鐨?嬈℃彙鎵嬭繃紼嬨傚湪寤虹珛榪炴帴涔嬪悗鎴栧彂鐢熼敊璇椂鍑芥暟榪斿洖銆傝繛鎺ヨ繃紼嬪彲鑳藉嚭鐜扮殑閿欒鎯呭喌鏈夛細
錛?錛?nbsp;濡傛灉瀹㈡埛鏈篢CP鍗忚娌℃湁鎺ユ敹鍒板瀹冪殑SYN鏁版嵁孌電殑紜錛屽嚱鏁頒互閿欒榪斿洖錛岄敊璇被鍨嬩負ETIMEOUT銆傞氬父TCP鍗忚鍦ㄥ彂閫丼YN鏁版嵁孌靛け璐ヤ箣鍚庯紝浼氬嬈″彂閫丼YN鏁版嵁孌碉紝鍦ㄦ墍鏈夌殑鍙戦侀兘楂樹腑澶辮觸涔嬪悗錛屽嚱鏁頒互閿欒榪斿洖銆?br>娉細SYN錛坰ynchronize錛変綅錛氳姹傝繛鎺ャ俆CP鐢ㄨ繖縐嶆暟鎹鍚戝鏂筎CP鍗忚璇鋒眰寤虹珛榪炴帴銆傚湪榪欎釜鏁版嵁孌典腑錛孴CP鍗忚灝嗗畠閫夋嫨鐨勫垵濮嬪簭鍒楀彿閫氱煡瀵規柟錛屽茍涓斾笌瀵規柟鍗忚鍗忓晢鏈澶ф暟鎹澶у皬銆係YN鏁版嵁孌電殑搴忓垪鍙蜂負鍒濆搴忓垪鍙鳳紝榪欎釜SYN鏁版嵁孌佃兘澶熻紜銆傚綋鍗忚鎺ユ敹鍒板榪欎釜鏁版嵁孌電殑紜涔嬪悗錛屽緩绔婽CP榪炴帴銆?br>錛?錛?nbsp;濡傛灉榪滅▼TCP鍗忚榪斿洖涓涓猂ST鏁版嵁孌碉紝鍑芥暟绔嬪嵆浠ラ敊璇繑鍥烇紝閿欒綾誨瀷涓篍CONNREFUSED銆傚綋榪滅▼鏈哄櫒鍦⊿YN鏁版嵁孌墊寚瀹氱殑鐩殑绔彛鍙峰娌℃湁鏈嶅姟榪涚▼鍦ㄧ瓑寰呰繛鎺ユ椂錛岃繙紼嬫満鍣ㄧ殑TCP鍗忚灝嗗彂閫佷竴涓猂ST鏁版嵁孌碉紝鍚戝鎴鋒満鎶ュ憡榪欎釜閿欒銆傚鎴鋒満鐨凾CP鍗忚鍦ㄦ帴鏀跺埌RST鏁版嵁孌靛悗涓嶅啀緇х畫鍙戦丼YN鏁版嵁孌碉紝鍑芥暟绔嬪嵆浠ラ敊璇繑鍥炪?br>娉細RST錛坮eset錛変綅錛氳〃紺鴻姹傞噸緗繛鎺ャ傚綋TCP鍗忚鎺ユ敹鍒頒竴涓笉鑳藉鐞嗙殑鏁版嵁孌墊椂錛屽悜瀵規柟TCP鍗忚鍙戦佽繖縐嶆暟鎹錛岃〃紺鴻繖涓暟鎹鎵鏍囪瘑鐨勮繛鎺ュ嚭鐜頒簡鏌愮閿欒錛岃姹俆CP鍗忚灝嗚繖涓繛鎺ユ竻闄ゃ傛湁3縐嶆儏鍐靛彲鑳藉鑷碩CP鍗忚鍙戦丷ST鏁版嵁孌碉細錛?錛塖YN鏁版嵁孌墊寚瀹氱殑鐩殑绔彛澶勬病鏈夋帴鏀惰繘紼嬪湪絳夊緟錛涳紙2錛塗CP鍗忚鎯蟲斁寮冧竴涓凡緇忓瓨鍦ㄧ殑榪炴帴錛涳紙3錛塗CP鎺ユ敹鍒頒竴涓暟鎹錛屼絾鏄繖涓暟鎹鎵鏍囪瘑鐨勮繛鎺ヤ笉瀛樺湪銆傛帴鏀跺埌RST鏁版嵁孌電殑TCP鍗忚绔嬪嵆灝嗚繖鏉¤繛鎺ラ潪姝e父鍦版柇寮錛屽茍鍚戝簲鐢ㄧ▼搴忔姤鍛婇敊璇?br>錛?錛?nbsp;濡傛灉瀹㈡埛鏈虹殑SYN鏁版嵁孌靛鑷存煇涓礬鐢卞櫒浜х敓“鐩殑鍦頒笉鍙埌杈?#8221;綾誨瀷鐨処CMP娑堟伅錛屽嚱鏁頒互閿欒榪斿洖錛岄敊璇被鍨嬩負EHOSTUNREACH鎴朎NETUNREACH銆傞氬父TCP鍗忚鍦ㄦ帴鏀跺埌榪欎釜ICMP娑堟伅涔嬪悗錛岃褰曡繖涓秷鎭紝鐒跺悗緇х畫鍑犳鍙戦丼YN鏁版嵁孌碉紝鍦ㄦ墍鏈夌殑鍙戦侀兘鍛婂け璐ヤ箣鍚庯紝TCP鍗忚媯鏌ヨ繖涓狪CMP娑堟伅錛屽嚱鏁頒互閿欒榪斿洖銆?br>娉細ICMP錛欼nternet 娑堟伅鎺у埗鍗忚銆侷nternet鐨勮繍琛屼富瑕佹槸鐢盜nternet鐨勮礬鐢卞櫒鏉ユ帶鍒訛紝璺敱鍣ㄥ畬鎴怚P鏁版嵁鍖呯殑鍙戦佸拰鎺ユ敹錛屽鏋滃彂閫佹暟鎹寘鏃跺彂鐢熼敊璇紝璺敱鍣ㄤ嬌鐢↖CMP鍗忚鏉ユ姤鍛婅繖浜涢敊璇侷CMP鏁版嵁鍖呮槸灝佽鍦↖P鏁版嵁鍖呯殑鏁版嵁閮ㄥ垎涓繘琛屼紶杈撶殑錛屽叾鏍煎紡濡備笅錛?br>綾誨瀷
鐮?nbsp;
鏍¢獙鍜?br>鏁版嵁
0 8 16 24 31
綾誨瀷錛氭寚鍑篒CMP鏁版嵁鍖呯殑綾誨瀷銆?br>浠g爜錛氭彁渚汭CMP鏁版嵁鍖呯殑榪涗竴姝ヤ俊鎭?br>鏍¢獙鍜岋細鎻愪緵浜嗗鏁翠釜ICMP鏁版嵁鍖呭唴瀹圭殑鏍¢獙鍜屻?br>ICMP鏁版嵁鍖呬富瑕佹湁浠ヤ笅綾誨瀷錛?br>錛?錛?nbsp;鐩殑鍦頒笉鍙埌杈撅細A銆佺洰鐨勪富鏈烘湭榪愯錛汢銆佺洰鐨勫湴鍧涓嶅瓨鍦紱C銆佽礬鐢辮〃涓病鏈夌洰鐨勫湴鍧瀵瑰簲鐨勬潯鐩紝鍥犺岃礬鐢卞櫒鏃犳硶鎵懼埌鍘誨線鐩殑涓繪満鐨勮礬鐢便?br>錛?錛?nbsp;瓚呮椂錛氳礬鐢卞櫒灝嗘帴鏀跺埌鐨処P鏁版嵁鍖呯殑鐢熷瓨鏃墮棿錛圱TL錛夊煙鍑?錛屽鏋滆繖涓煙鐨勫煎彉涓?錛岃礬鐢卞櫒涓㈠純榪欎釜IP鏁版嵁鍖咃紝騫朵笖鍙戦佽繖縐岻CMP娑堟伅銆?br>錛?錛?nbsp;鍙傛暟鍑洪敊錛氬綋IP鏁版嵁鍖呬腑鏈夋棤鏁堝煙鏃跺彂閫併?br>錛?錛?nbsp;閲嶅畾鍚戯細灝嗕竴鏉℃柊鐨勮礬寰勯氱煡涓繪満銆?br>錛?錛?nbsp;ECHO璇鋒眰銆丒CHO鍥炵瓟錛氳繖涓ゆ潯娑堟伅鐢ㄨ嫻嬭瘯鐩殑涓繪満鏄惁鍙互鍒拌揪銆傝姹傝呭悜鐩殑涓繪満鍙戦丒CHO璇鋒眰ICMP鏁版嵁鍖咃紝鐩殑涓繪満鍦ㄦ帴鏀跺埌榪欎釜ICMP鏁版嵁鍖呬箣鍚庯紝榪斿洖ECHO鍥炵瓟ICMP鏁版嵁鍖呫?br>錛?錛?nbsp;鏃舵埑璇鋒眰銆佹椂鎴沖洖絳旓細ICMP鍗忚浣跨敤榪欎袱縐嶆秷鎭粠鍏朵粬鏈哄櫒澶勮幏寰楀叾鏃墮挓鐨勫綋鍓嶆椂闂淬?br>
璋冪敤鍑芥暟connect鐨勮繃紼嬩腑錛屽綋瀹㈡埛鏈篢CP鍗忚鍙戦佷簡SYN鏁版嵁孌電殑紜涔嬪悗錛孴CP鐘舵佺敱CLOSED鐘舵佽漿涓篠YN_SENT鐘舵侊紝鍦ㄦ帴鏀跺埌瀵筍YN鏁版嵁孌電殑紜涔嬪悗錛孴CP鐘舵佽漿鎹㈡垚ESTABLISHED鐘舵侊紝鍑芥暟鎴愬姛榪斿洖銆傚鏋滆皟鐢ㄥ嚱鏁癱onnect澶辮觸錛屽簲璇ョ敤close鍏抽棴榪欎釜濂楁帴瀛楁弿榪扮錛屼笉鑳藉啀嬈′嬌鐢ㄨ繖涓鎺ュ瓧鎻忚堪絎︽潵璋冪敤鍑芥暟connect銆?br>
娉細TCP鍗忚鐘舵佽漿鎹㈠浘錛?br>
琚姩OPEN CLOSE 涓誨姩OPEN
錛堝緩绔婽CB錛?nbsp;錛堝垹闄CB錛?nbsp;錛堝緩绔婽CB錛?br>鍙戦丼YN錛?br>鎺ユ敹SYN SEND
錛堝彂閫丼YN錛孉CK錛?nbsp;錛堝彂閫丼YN錛?br>
鎺ユ敹SYN鐨凙CK錛堟棤鍔ㄤ綔錛?nbsp;
鎺ユ敹SYN鐨凙CK 鎺ユ敹SYN錛孉CK
錛堟棤鍔ㄤ綔錛?nbsp;錛堝彂閫丄CK錛?br>CLOSE
錛堝彂閫丗IN錛?nbsp;CLOSE 鎺ユ敹FIN
錛堝彂閫丗IN錛?nbsp;錛堝彂閫丗IN錛?br>
鎺ユ敹FIN
鎺ユ敹FIN鐨凙CK錛堟棤鍔ㄤ綔錛?nbsp;錛堝彂閫丄CK錛?nbsp;CLOSE錛堝彂閫丗IN錛?br>
鎺ユ敹FIN 鎺ユ敹FIN鐨凙CK 鎺ユ敹FIN鐨凙CK
錛堝彂閫丄CK錛?nbsp;錛堟棤鍔ㄤ綔錛?nbsp;錛堟棤鍔ㄤ綔錛?br>
2MSL瓚呮椂錛堝垹闄CB錛?nbsp;
錛?錛?nbsp;鍑芥暟bind錛堬級
鍑芥暟bind灝嗘湰鍦板湴鍧涓庡鎺ュ瓧緇戝畾鍦ㄤ竴璧鳳紝鍏跺畾涔夊涓嬶細
#include< sys/types.h>
#include< sys/socket.h>
int bind(int sockfd,struct sockaddr * myaddr,int addrlen)錛?br>鍙傛暟sockfd鏄嚱鏁皊ockt榪斿洖鐨勫鎺ュ瓧鎻忚堪絎︼紱鍙傛暟myaddr鏄湰鍦板湴鍧錛涘弬鏁癮ddrlen鏄鎺ュ瓧鍦板潃緇撴瀯鐨勯暱搴︺傛墽琛屾垚鍔熸椂榪斿洖0錛屽惁鍒欙紝榪斿洖-1錛屽茍璁劇疆鍏ㄥ眬鍙橀噺errno涓洪敊璇被鍨婨ADDRINUSER銆?br>鏈嶅姟鍣ㄥ拰瀹㈡埛鏈洪兘鍙互璋冪敤鍑芥暟bind鏉ョ粦瀹氬鎺ュ瓧鍦板潃錛屼絾涓鑸槸鏈嶅姟鍣ㄨ皟鐢ㄥ嚱鏁癰ind鏉ョ粦瀹氳嚜宸辯殑鍏绔彛鍙楓傜粦瀹氭搷浣滀竴鑸湁濡備笅鍑犵緇勫悎鏂瑰紡錛?br>琛?
紼嬪簭綾誨瀷
IP鍦板潃
绔彛鍙?br>璇存槑
鏈嶅姟鍣?br>INADDR_ANY
闈為浂鍊?br>鎸囧畾鏈嶅姟鍣ㄧ殑鍏绔彛鍙?br>鏈嶅姟鍣?br>鏈湴IP鍦板潃
闈為浂鍊?br>鎸囧畾鏈嶅姟鍣ㄧ殑IP鍦板潃鍜屽叕璁ょ鍙e彿
瀹㈡埛鏈?br>INADDR_ANY
闈為浂鍊?br>鎸囧畾瀹㈡埛鏈虹殑榪炴帴绔彛鍙?br>瀹㈡埛鏈?br>鏈湴IP鍦板潃
闈為浂鍊?br>鎸囧畾瀹㈡埛鏈虹殑IP鍦板潃榪炴帴绔彛鍙?br>瀹㈡埛鏈?br>鏈湴IP鍦板潃
闆?br>鎸囧畾瀹㈡埛鏈虹殑IP鍦板潃
鍒嗗埆璇存槑濡備笅錛?br>錛?錛?nbsp;鏈嶅姟鍣ㄦ寚瀹氬鎺ュ瓧鍦板潃鐨勫叕璁ょ鍙e彿錛屼笉鎸囧畾IP鍦板潃錛氬嵆鏈嶅姟鍣ㄨ皟鐢╞ind鏃訛紝璁劇疆濂楁帴瀛楃殑IP鍦板潃涓虹壒孌婄殑INADDE-ANY錛岃〃紺哄畠鎰挎剰鎺ユ敹鏉ヨ嚜浠諱綍緗戠粶璁懼鎺ュ彛鐨勫鎴鋒満榪炴帴銆傝繖鏄湇鍔″櫒鏈甯哥敤鐨勭粦瀹氭柟寮忋?br>錛?錛?nbsp;鏈嶅姟鍣ㄦ寚瀹氬鎺ュ瓧鍦板潃鐨勫叕璁ょ鍙e彿鍜孖P鍦板潃錛氭湇鍔″櫒璋冪敤bind鏃訛紝濡傛灉璁劇疆濂楁帴瀛楃殑IP鍦板潃涓烘煇涓湰鍦癐P鍦板潃錛岃繖琛ㄧず榪欏彴鏈哄櫒鍙帴鏀舵潵鑷搴斾簬榪欎釜IP鍦板潃鐨勭壒瀹氱綉緇滆澶囨帴鍙g殑瀹㈡埛鏈鴻繛鎺ャ傚綋鏈嶅姟鍣ㄦ湁澶氬潡緗戝崱鏃訛紝鍙互鐢ㄨ繖縐嶆柟寮忔潵闄愬埗鏈嶅姟鍣ㄧ殑鎺ユ敹鑼冨洿銆?br>錛?錛?nbsp;瀹㈡埛鏈烘寚瀹氬鎺ュ瓧鍦板潃鐨勮繛鎺ョ鍙e彿錛氫竴鑸儏鍐典笅錛屽鎴鋒満璋冪敤connect鍑芥暟鏃朵笉鐢ㄦ寚瀹氳嚜宸辯殑濂楁帴瀛楀湴鍧鐨勭鍙e彿銆傜郴緇熶細鑷姩涓哄畠閫夋嫨涓涓湭鐢ㄧ殑绔彛鍙鳳紝騫朵笖鐢ㄦ湰鍦扮殑IP鍦板潃鏉ュ~鍏呭鎺ュ瓧鍦板潃涓殑鐩稿簲欏廣備絾鏈夋椂瀹㈡埛鏈洪渶瑕佷嬌鐢ㄤ竴涓壒瀹氱殑绔彛鍙鳳紙姣斿淇濈暀绔彛鍙鳳級錛岃岀郴緇熶笉浼氭湭瀹㈡埛鏈鴻嚜鍔ㄥ垎閰嶄竴涓繚鐣欑鍙e彿錛屾墍浠ラ渶瑕佽皟鐢ㄥ嚱鏁癰ind鏉ュ拰涓涓湭鐢ㄧ殑淇濈暀绔彛鍙風粦瀹氥?br>錛?錛?nbsp;鎸囧畾瀹㈡埛鏈虹殑IP鍦板潃鍜岃繛鎺ョ鍙e彿錛氳〃紺哄鎴鋒満浣跨敤鎸囧畾鐨勭綉緇滆澶囨帴鍙e拰绔彛鍙瘋繘琛岄氫俊銆?br>錛?錛?nbsp;鎸囧畾瀹㈡埛鏈虹殑IP鍦板潃錛氳〃紺哄鎴鋒満浣跨敤鎸囧畾鐨勭綉緇滆澶囨帴鍙e拰绔彛鍙瘋繘琛岄氫俊錛岀郴緇熻嚜鍔ㄤ負瀹㈡埛鏈洪変竴涓湭鐢ㄧ殑绔彛鍙楓備竴鑸彧鏈夊湪涓繪満鏈夊涓綉緇滆澶囨帴鍙f椂浣跨敤銆?br>鎴戜滑涓鑸笉鍦ㄥ鎴鋒満涓婁嬌鐢ㄥ浐瀹氱殑瀹㈡埛鏈虹鍙e彿錛岄櫎闈炴槸蹇呴』浣跨敤鐨勬儏鍐點傚湪瀹㈡埛鏈轟笂浣跨敤鍥哄畾鐨勭鍙e彿鏈変互涓嬩笉鍒╋細
錛?錛?nbsp;鏈嶅姟鍣ㄦ墽琛屼富鍔ㄥ叧闂搷浣滐細鏈嶅姟鍣ㄦ渶鍚庤繘鍏IME_WAIT鐘舵併傚綋瀹㈡埛鏈哄啀嬈′笌榪欎釜鏈嶅姟鍣ㄨ繘琛岃繛鎺ユ椂錛屼粛浣跨敤鐩稿悓鐨勫鎴鋒満绔彛鍙鳳紝浜庢槸榪欎釜榪炴帴涓庡墠嬈¤繛鎺ョ殑濂楁帴瀛楀瀹屽叏涓鏍鳳紝浣嗘槸涓鍛€佷負鍓嶆榪炴帴澶勪簬TIME_WAIT鐘舵侊紝騫舵湭娑堝け錛屾墍浠ヨ繖嬈¤繛鎺ヨ姹傝鎷掔粷錛屽嚱connect浠ラ敊璇繑鍥烇紝閿欒綾誨瀷涓篍CONNREFUSED
錛?錛?nbsp;瀹㈡埛鏈烘墽琛屼富鍔ㄥ叧闂搷浣滐細瀹㈡埛鏈烘渶鍚庤繘鍏IME_WAIT鐘舵併傚綋椹笂鍐嶆鎵ц榪欎釜瀹㈡埛鏈虹▼搴忔椂錛屽鎴鋒満灝嗙戶緇笌榪欎釜鍥哄畾瀹㈡埛鏈虹鍙e彿緇戝畾錛屼絾鍥犱負鍓嶆榪炴帴澶勪簬TIME_WAIT鐘舵侊紝騫舵湭娑堝け錛岀郴緇熶細鍙戠幇榪欎釜绔彛鍙蜂粛琚崰鐢紝鎵浠ヨ繖嬈$粦瀹氭搷浣滃け璐ワ紝鍑芥暟bind浠ラ敊璇繑鍥烇紝閿欒綾誨瀷涓篍ADDRINUSE銆?br>錛?錛?nbsp;鍑芥暟listen錛堬級
鍑芥暟listen灝嗕竴涓鎺ュ瓧杞崲涓哄緛鍚鎺ュ瓧錛屽畾涔夊涓嬶紱
#include< sys/socket,h>
int listen(int sockfd錛宨nt backlog)
鍙傛暟sockfd鎸囧畾瑕佽漿鎹㈢殑濂楁帴瀛楁弿榪扮錛涘弬鏁癰acklog璁劇疆璇鋒眰闃熷垪鐨勬渶澶ч暱搴︼紱鎵ц鎴愬姛鏃惰繑鍥?錛?nbsp;鍚﹀垯榪斿洖-1銆傚嚱鏁發isten鍔熻兘鏈変袱涓細
錛?錛?nbsp;灝嗕竴涓皻鏈繛鎺ョ殑涓誨姩濂楁帴瀛楋紙鍑芥暟socket鍒涘緩鐨勫彲浠ョ敤鏉ヨ繘琛屼富鍔ㄨ繛鎺ヤ絾涓嶈兘鎺ュ彈榪炴帴璇鋒眰鐨勫鎺ュ瓧錛夎漿鎹㈡垚涓涓鍔ㄨ繛鎺ュ鎺ュ瓧銆傛墽琛宭isten涔嬪悗錛屾湇鍔″櫒鐨凾CP鐘舵佺敱CLOSED杞負LISTEN鐘舵併?br>錛?錛?nbsp;TCP鍗忚灝嗗埌杈劇殑榪炴帴璇鋒眰闃熷垪錛屽嚱鏁發isten鐨勭浜屼釜鍙傛暟鎸囧畾榪欎釜闃熷垪鐨勬渶澶ч暱搴︺?br>娉細鍙傛暟backlog鐨勪綔鐢細
TCP鍗忚涓烘瘡涓涓緛鍚鎺ュ瓧緇存姢涓や釜闃熷垪錛?br>錛?錛?nbsp;鏈畬鎴愯繛鎺ラ槦鍒楋細姣忎釜灝氭湭瀹屾垚3嬈℃彙鎵嬫搷浣滅殑TCP榪炴帴鍦ㄨ繖涓槦鍒椾腑鍗犳湁涓欏廣俆CP甯屾湜浠湪鎺ユ敹鍒頒竴涓鎴鋒満SYN鏁版嵁孌典箣鍚庯紝鍦ㄨ繖涓槦鍒椾腑鍒涘緩涓涓柊鏉$洰錛岀劧鍚庡彂閫佸瀹㈡埛鏈篠YN鏁版嵁孌電殑紜鍜岃嚜宸辯殑SYN鏁版嵁孌碉紙ACK+SYN鏁版嵁孌碉級錛岀瓑寰呭鎴鋒満瀵硅嚜宸辯殑SYN鏁版嵁孌電殑紜銆傛鏃訛紝濂楁帴瀛楀浜嶴YN_RCVD鐘舵併傝繖涓潯鐩皢淇濆瓨鍦ㄨ繖涓槦鍒椾腑錛岀洿鍒板鎴鋒満榪斿洖瀵筍YN鏁版嵁孌電殑紜鎴栬呰繛鎺ヨ秴鏃躲?br>錛?錛?nbsp;瀹屾垚榪炴帴闃熷垪錛氭瘡涓凡緇忓畬鎴?嬈℃彙鎵嬫搷浣滐紝浣嗗皻鏈搴旂敤紼嬪簭鎺ユ敹錛堣皟鐢ㄥ嚱鏁癮ccept錛夌殑TCP榪炴帴鍦ㄨ繖涓槦鍒椾腑鍗犳湁涓欏廣傚綋涓涓湪鏈畬鎴愯繛鎺ラ槦鍒椾腑鐨勮繛鎺ユ帴鏀跺埌瀵筍YN鏁版嵁孌電殑紜涔嬪悗錛屽畬鎴?嬈℃彙鎵嬫搷浣滐紝TCP鍗忚灝嗗畠浠庢湭瀹屾垚榪炴帴闃熷垪縐誨埌瀹屾垚榪炴帴闃熷垪涓傛鏃訛紝濂楁帴瀛楀浜嶦STABLISHED鐘舵併傝繖涓潯鐩皢淇濆瓨鍦ㄨ繖涓槦鍒椾腑錛岀洿鍒板簲鐢ㄧ▼搴忚皟鐢ㄥ嚱鏁癮ccept鏉ユ帴鏀跺畠銆?br>鍙傛暟backlog鎸囧畾鏌愪釜寰佸惉濂楁帴瀛楃殑瀹屾垚榪炴帴闃熷垪鐨勬渶澶ч暱搴︼紝琛ㄧず榪欎釜濂楁帴瀛楄兘澶熸帴鏀剁殑鏈澶ф暟鐩殑鏈帴鏀惰繛鎺ャ傚鏋滃綋涓涓鎴鋒満鐨凷YN鏁版嵁孌靛埌杈炬椂錛屽緛鍚鎺ュ瓧鐨勫畬鎴愰槦鍒楀凡緇忔弧浜嗭紝閭d箞TCP鍗忚灝嗗拷鐣ヨ繖涓猄YN鏁版嵁孌點傚浜庝笉鑳芥帴鏀剁殑SYN鏁版嵁孌碉紝TCP鍗忚涓嶅彂閫丷ST鏁版嵁孌碉紝
錛?錛?nbsp;鍑芥暟accept錛堬級
鍑芥暟accept浠庡緛鍚鎺ュ瓧鐨勫畬鎴愰槦鍒椾腑鎺ユ敹涓涓凡緇忓緩绔嬭搗鏉ョ殑TCP榪炴帴銆傚鏋滃畬鎴愯繛鎺ラ槦鍒椾負絀猴紝閭d箞榪欎釜榪涚▼鐫$湢銆?br>#include< sys/socket.h>
int accept(int sockfd錛宻truct sockaddr * addr錛宨nt * addrlen)
鍙傛暟sockfd鎸囧畾寰佸惉濂楁帴瀛楁弿榪扮錛涘弬鏁癮ddr涓烘寚鍚戜竴涓狪nternet濂楁帴瀛楀湴鍧緇撴瀯鐨勬寚閽堬紱鍙傛暟addrlen涓烘寚鍚戜竴涓暣鍨嬪彉閲忕殑鎸囬拡銆傛墽琛屾垚鍔熸椂錛岃繑鍥?涓粨鏋滐細鍑芥暟榪斿洖鍊間負涓涓柊鐨勫鎺ュ瓧鎻忚堪絎︼紝鏍囪瘑榪欎釜鎺ユ敹鐨勮繛鎺ワ紱鍙傛暟addr鎸囧悜鐨勭粨鏋勫彉閲忎腑瀛樺偍瀹㈡埛鏈哄湴鍧錛涘弬鏁癮ddrlen鎸囧悜鐨勬暣鍨嬪彉閲忎腑瀛樺偍瀹㈡埛鏈哄湴鍧鐨勯暱搴︺傚け璐ユ椂榪斿洖-1銆?br>寰佸惉濂楁帴瀛椾笓涓烘帴鏀跺鎴鋒満榪炴帴璇鋒眰錛屽畬鎴?嬈℃彙鎵嬫搷浣滆岀敤鐨勶紝鎵浠CP鍗忚涓嶈兘浣跨敤寰佸惉濂楁帴瀛楁弿榪扮鏉ユ爣璇嗚繖涓繛鎺ワ紝浜庢槸TCP鍗忚鍒涘緩涓涓柊鐨勫鎺ュ瓧鏉ユ爣璇嗚繖涓鎺ユ敹鐨勮繛鎺ワ紝騫跺皢瀹冪殑鎻忚堪絎﹀彂鎸ョ粰搴旂敤紼嬪簭銆傜幇鍦ㄦ湁涓や釜濂楁帴瀛楋紝涓涓槸璋冪敤鍑芥暟accept鏃朵嬌鐢ㄧ殑寰佸惉濂楁帴瀛楋紝鍙︿竴涓槸鍑芥暟accept榪斿洖鐨勮繛鎺ュ鎺ュ瓧錛坈onnected socket錛夈備竴涓湇鍔″櫒閫氬父鍙渶鍒涘緩涓涓緛鍚鎺ュ瓧錛屽湪鏈嶅姟鍣ㄨ繘紼嬬殑鏁翠釜媧誨姩鏈熼棿錛岀敤瀹冩潵鎺ユ敹鎵鏈夊鎴鋒満鐨勮繛鎺ヨ姹傦紝鍦ㄦ湇鍔″櫒榪涚▼緇堟鍓嶅叧闂繖涓緛鍚鎺ュ瓧錛涘浜庢病涓涓帴鏀剁殑錛坅ccepted錛夎繛鎺ワ紝TCP鍗忚閮藉垱寤轟竴涓柊鐨勮繛鎺ュ鎺ュ瓧鏉ユ爣璇嗚繖涓繛鎺ワ紝鏈嶅姟鍣ㄤ嬌鐢ㄨ繖涓繛鎺ュ鎺ュ瓧涓庡鎴鋒満榪涜閫氫俊鎿嶄綔錛屽綋鏈嶅姟鍣ㄥ鐞嗗畬榪欎釜瀹㈡埛鏈鴻姹傛椂錛屽叧闂繖涓繛鎺ュ鎺ュ瓧銆?br>褰撳嚱鏁癮ccept闃誨絳夊緟宸茬粡寤虹珛鐨勮繛鎺ユ椂錛屽鏋滆繘紼嬫崟鑾峰埌淇″彿錛屽嚱鏁板皢浠ラ敊璇繑鍥烇紝閿欒綾誨瀷涓篍INTR銆傚浜庤繖縐嶉敊璇紝涓鑸噸鏂拌皟鐢ㄥ嚱鏁癮ccept鏉ユ帴鏀惰繛鎺ャ?br>錛?錛?nbsp;鍑芥暟close錛堬級
鍑芥暟close鍏抽棴涓涓鎺ュ瓧鎻忚堪絎︺傚畾涔夊涓嬶細
#include< unistd.h>
int close(int sockfd)錛?br>鎵ц鎴愬姛鏃惰繑鍥?錛屽惁鍒欒繑鍥?1銆備笌鎿嶄綔鏂囦歡鎻忚堪絎︾殑close涓鏍鳳紝鍑芥暟close灝嗗鎺ュ瓧鎻忚堪絎︾殑寮曠敤璁℃暟鍣ㄥ噺1錛屽鏋滄弿榪扮鐨勫紩鐢ㄨ鏁板ぇ浜?錛屽垯琛ㄧず榪樻湁榪涚▼寮曠敤榪欎釜鎻忚堪絎︼紝鍑芥暟close姝e父榪斿洖錛涘鏋滀負0錛屽垯鍚姩娓呴櫎濂楁帴瀛楁弿榪扮鐨勬搷浣滐紝鍑芥暟close绔嬪嵆姝e父榪斿洖銆?br>璋冪敤close涔嬪悗錛岃繘紼嬪皢涓嶅啀鑳藉璁塊棶榪欎釜濂楁帴瀛楋紝浣員CP鍗忚灝嗙戶緇嬌鐢ㄨ繖涓鎺ュ瓧錛屽皢灝氭湭鍙戦佺殑鏁版嵁浼犻掑埌瀵規柟錛岀劧鍚庡彂閫丗IN鏁版嵁孌碉紝鎵ц鍏抽棴鎿嶄綔錛屼竴鐩寸瓑鍒拌繖涓猅CP榪炴帴瀹屽叏鍏抽棴涔嬪悗錛孴CP鍗忚鎵嶅垹闄よ濂楁帴瀛椼?br>錛?錛?nbsp;鍑芥暟read錛堬級鍜寃rite錛堬級
鐢ㄤ簬浠庡鎺ュ瓧璇誨啓鏁版嵁銆傚畾涔夊涓嬶細
int read(int fd錛宑har * buf錛宨nt len)
int write(int fd錛宑har * buf錛宨nt len)
鍑芥暟鎵ц鎴愬姛鏃訛紝榪斿洖璇繪垨鍐欑殑鏁版嵁閲忕殑澶у皬錛屽け璐ユ椂榪斿洖-1銆?br>姣忎釜TCP濂楁帴瀛楅兘鏈変袱涓紦鍐插尯錛氬鎺ュ瓧鍙戦佺紦鍐插尯銆佸鎺ュ瓧鎺ユ敹緙撳啿鍖猴紝鍒嗗埆澶勭悊鍙戦佸拰鎺ユ敹浠誨姟銆備粠緗戠粶璇匯佸啓鏁版嵁鐨勬搷浣滄槸鐢盩CP鍗忚鍦ㄥ唴鏍鎬腑瀹屾垚鐨勶細TCP鍗忚灝嗕粠緗戠粶涓婃帴鏀跺埌鐨勬暟鎹繚瀛樺湪鐩稿簲濂楁帴瀛楃殑鎺ユ敹緙撳啿鍖轟腑錛岀瓑寰呯敤鎴瘋皟鐢ㄥ嚱鏁板皢瀹冧滑浠庢帴鏀剁紦鍐插尯鎷瘋礉鍒扮敤鎴風紦鍐插尯錛涚敤鎴峰皢瑕佸彂閫佺殑鏁版嵁鎷瘋礉鍒扮浉搴斿鎺ュ瓧鐨勫彂閫佺紦鍐插尯涓紝鐒跺悗鐢盩CP鍗忚鎸夌収涓瀹氱殑綆楁硶澶勭悊榪欎簺鏁版嵁銆?br>璇誨啓榪炴帴濂楁帴瀛楃殑鎿嶄綔涓庤鍐欐枃浠剁殑鎿嶄綔綾諱技錛屼篃鍙互浣跨敤鍑芥暟read鍜寃rite銆傚嚱鏁皉ead瀹屾垚灝嗘暟鎹粠濂楁帴瀛楁帴鏀剁紦鍐插尯鎷瘋礉鍒扮敤鎴風紦鍐插尯錛氬綋濂楁帴瀛楁帴鏀剁紦鍐插尯鏈夋暟鎹彲璇繪椂錛?錛氬彲璇繪暟鎹噺澶т簬鍑芥暟read鎸囧畾鍊鹼紝榪斿洖鍑芥暟鍙傛暟len鎸囧畾鐨勬暟鎹噺錛?錛氫簡搴︽暟鎹噺灝忎簬鍑芥暟read鎸囧畾鍊鹼紝鍑芥暟read涓嶇瓑寰呰姹傜殑鎵鏈夋暟鎹兘鍒拌揪錛岃屾槸绔嬪嵆榪斿洖瀹為檯璇誨埌鐨勬暟鎹噺錛涘綋鏃犳暟鎹彲璇繪椂錛屽嚱鏁皉ead灝嗛樆濉炰笉榪斿洖錛岀瓑寰呮暟鎹埌杈俱?br>褰揟CP鍗忚鎺ユ敹鍒癋IN鏁版嵁孌碉紝鐩稿綋浜庣粰璇繪搷浣滀竴涓枃浠剁粨鏉熺錛屾鏃秗ead鍑芥暟榪斿洖0錛屽茍涓斾互鍚庢墍鏈夊湪榪欎釜濂楁帴瀛椾笂鐨勮鎿嶄綔鍧囪繑鍥?錛岃繖鍜屾櫘閫氭枃浠朵腑閬囧埌鏂囦歡緇撴潫絎︽槸涓鏍風殑銆?br>褰揟CP鍗忚鎺ユ敹鍒癛ST鏁版嵁孌碉紝琛ㄧず榪炴帴鍑虹幇浜嗘煇縐嶉敊璇紝鍑芥暟read灝嗕互閿欒榪斿洖錛岄敊璇被鍨嬩負ECONNERESET銆傚茍涓斾互鍚庢墍鏈夊湪榪欎釜濂楁帴瀛椾笂鐨勮鎿嶄綔鍧囪繑鍥為敊璇傞敊璇繑鍥炴椂榪斿洖鍊煎皬浜?銆?br>鍑芥暟write瀹屾垚灝嗘暟鎹粠鐢ㄦ埛緙撳啿鍖烘嫹璐濆埌濂楁帴瀛楀彂閫佺紦鍐插尯鐨勪換鍔★細鍒板鎺ュ瓧鍙戦佺紦鍐插尯鏈夎凍澶熸嫹璐濇墍鏈夌敤鎴鋒暟鎹殑絀洪棿鏃訛紝鍑芥暟write灝嗘暟鎹嫹璐濆埌榪欎釜緙撳啿鍖轟腑錛屽茍榪斿洖鑰佽緢鐨勬暟閲忓ぇ灝忥紝濡傛灉鍙敤絀洪棿灝忎簬write鍙傛暟len鎸囧畾鐨勫ぇ灝忔椂錛屽嚱鏁皐rite灝嗛樆濉炰笉榪斿洖錛岀瓑寰呯紦鍐插尯鏈夎凍澶熺殑絀洪棿銆?br>褰揟CP鍗忚鎺ユ敹鍒癛ST鏁版嵁孌碉紙褰撳鏂瑰凡緇忓叧闂簡榪欐潯榪炴帴涔嬪悗錛岀戶緇悜榪欎釜濂楁帴瀛楀彂閫佹暟鎹皢瀵艱嚧瀵規柟TCP鍗忚榪斿洖RST鏁版嵁孌碉級錛孴CP鍗忚鎺ユ敹鍒癛ST鏁版嵁孌墊椂錛屽嚱鏁皐rite灝嗕互閿欒榪斿洖錛岄敊璇被鍨嬩負EINTR銆備互鍚庡彲浠ョ戶緇湪榪欎釜濂楁帴瀛椾笂鍐欐暟鎹?br>錛?錛?nbsp;鍑芥暟getsockname錛堬級鍜実etpeername錛堬級
鍑芥暟getsockname榪斿洖濂楁帴瀛楃殑鏈湴鍦板潃錛涘嚱鏁癵etpeername榪斿洖濂楁帴瀛楀搴旂殑榪滅▼鍦板潃銆?br>
10銆?nbsp;緇撴潫璇?br>緗戠粶紼嬪簭璁捐鍏ㄩ潬濂楁帴瀛楁帴鏀跺拰鍙戦佷俊鎭備笂鏂囦富瑕佽榪頒簡Linux 涓婼ocket鐨勫熀鏈蹇點丼ockets API浠ュ強Socket鎵娑夊強鍒扮殑TCP甯歌瘑
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浠涔堟槸socket錛焥ocket灝辨槸...錛屾垜鍦ㄨ繖閲屽氨涓嶆妱涔︿簡錛屾湁鍏磋叮鐨勫悓浠佸幓鏌ユ煡涔﹀惂銆?br />涓嶈繃榪樿璇翠竴鍙ワ紝socket灝辨槸涓嶅悓榪涚▼涔嬮棿鐨勪竴縐嶉氫俊鏂瑰紡銆傚氨璞℃墦鐢佃瘽鏄湅鍙嬩箣闂寸殑涓縐嶉氫俊鏂瑰紡鏄竴鏍楓備釜浜虹悊瑙o細鎵璋撯滈氫俊鈥濓紝灝辨槸鐩鎬簰涔嬮棿鍙戦佹暟鎹傛湁浜虹悊瑙ocket鏄笉鍚岃綆楁満涔嬮棿鐨勪竴縐嶉氫俊鏂?br />寮忥紝榪欐槸涓嶇‘鍒囩殑銆備袱涓繘紼嬶紝涓嶇鏄繍琛屽湪鍚屼竴鍙拌綆楁満涓婏紝榪樻槸榪愯鍦ㄤ笉鍚岃綆楁満涓婏紝閮藉彲閫氳繃
socket鎶鏈繘琛岄氫俊銆?br />
socket濂楁帴瀛楃殑浣跨敤闇瑕佹湁緗戝崱鐨勬敮鎸侊紝鎵浠ocket涓鑸兘琚敤鏉ュ湪涓嶅悓鏈哄櫒涔嬮棿閫氫俊錛岃屽鏋滃湪鍚屼竴鍙拌綆楁満涓婄殑涓や釜榪涚▼榪涜閫氫俊錛岄氬父閲囩敤鏁堢巼鏇撮珮鐨勫叡浜唴瀛樻妧鏈潵瀹炵幇銆?br />
涓や釜榪涚▼涔嬮棿榪涜閫氳錛屽氨闇瑕佷袱涓繘紼嬪悓鏃墮兘鍦ㄨ繍琛屼簡錛堝簾璇濓級錛屽湪鍏蜂綋瀹炵幇涓紝涓や釜榪涚▼鎴戜滑閫氬父瑕佸尯鍒寰咃紝涓涓繘紼嬩笓闂ㄧ瓑寰呭彟涓涓繘紼嬬粰鑷繁鍙戞秷鎭紝鏀跺埌娑堟伅鍚庤繘琛屽鐞嗭紝鍦ㄦ妸澶勭悊緇撴灉鍙戦佸洖鍘匯傛垜浠妸涓撻棬澶勭悊娑堟伅銆佹彁渚涙湇鍔$殑榪涚▼縐頒負鏈嶅姟鍣ㄧ錛屾妸鍙戦佹秷鎭佽姹傚鐞嗙殑榪涚▼縐頒負瀹㈡埛绔傛諱綋榪囩▼灝辨槸瀹㈡埛绔彂閫佷竴涓秷鎭粰鏈嶅姟鍣ㄧ錛屾湇鍔″櫒绔繘紼嬫敹鍒版秷鎭繘琛屽鐞嗭紝鎶婂鐞嗙粨鏋滃彂閫佺粰瀹㈡埛绔傛仼錛屽氨鏄繖鏍楓?br />
榪樻湁涓涓棶棰橈紝濡傛灉鎴戠幇鍦ㄦ湁涓涓繘紼嬭璺熷彟涓鍙拌綆楁満涓婄殑鏌愪釜榪涚▼榪涜socket閫氫俊錛岄偅鍦ㄦ垜榪欎釜榪涚▼涓浣曟寚瀹氬彟涓涓繘紼嬪憿錛熻繖閲岃繕闇瑕佽涓涓嬪彟涓涓蹇碘斺旂鍙o紝濡傛灉鎶婃搷浣滅郴緇熸瘮浣滀竴搴ф埧瀛愮殑璇濓紝閭g鍙e氨鏄埧瀛愮殑紿楀彛錛屾槸緋葷粺澶栫晫鍚岀郴緇熷唴閮ㄨ繘琛岄氫俊鐨勯氶亾銆傚湪socket瀹炵幇涓紝鎴戜滑涓嶈繘琛屽彟涓涓繘紼嬬殑鎸囧畾錛岃屾槸鎸囧畾鍙戦佹秷鎭垨鎺ユ敹娑堟伅鐨勭鍙e彿銆傛瘮濡傝鐜板湪榪涚▼A瑕佺粰榪涚▼B鍙戞秷鎭紝鎴戜滑浼氭妸娑堟伅鍙戦佸埌榪涚▼B鎵榪愯鐨勮綆楁満鐨勭鍙涓婏紝鑰岃繘紼婤姝ゆ椂姝e湪鐩戣绔彛N錛岃繖鏍瘋繘紼婤灝辮兘鏀跺埌榪涚▼A鍙戦佹潵鐨勬暟鎹紝鍚屾牱榪涚▼B涔熸妸娑堟伅鍙戦佸埌璇ョ鍙d笂錛岃繘紼婣涔熻兘浠庤绔彛鏀跺埌榪涚▼B鍙戦佹潵鐨勬暟鎹紝褰撶劧錛岃繖闇瑕佸鎴風鍜屾湇鍔″櫒绔叧浜庣鍙e彿榪涜涓涓害瀹氾紝鍗沖叡鍚屾搷浣滃悓涓涓鍙c傚鏋滃鎴風鎶婃秷鎭彂閫佸埌绔彛N1涓婏紝鑰屾湇鍔″櫒绔洃瑙嗙殑鏄鍙2錛岄偅閫氫俊涓瀹氫笉鑳芥垚鍔熴傜鍙e彿鏈澶т負65535錛屼笉鑳芥瘮榪欎釜鍐嶅ぇ浜嗭紝浣嗗湪鎴戜滑鑷繁鐨勭▼搴忎腑灝介噺涓嶈鐢ㄥ皬浜?024鐨勭鍙e彿錛屽皬浜?024鐨勭鍙eソ寰堝閮借緋葷粺浣跨敤浜嗭紝姣斿23琚玹elnet鎵浣跨敤銆?br />
socket鐨勫疄鐜版槸寰堢畝鍗曠殑錛屽彧瑕佹寜鐓т竴瀹氱殑姝ラ錛屽氨鍙┈涓婂緩绔嬩竴涓繖鏍風殑閫氫俊閫氶亾銆?br />
涓嬮潰杈冭緇嗙殑浠嬬粛鍑犱釜鏍稿績鐨勫嚱鏁幫細
SOCKET socket(int af, int type, int protocol);
鏃犺鏄鎴風榪樻槸鏈嶅姟鍣ㄧ錛屼笅闈㈣繖涓嚱鏁版槸涓瀹氳鐢ㄥ埌鐨勶紝涔熸槸鏈鍏堢敤鍒扮殑銆?br />榪欎釜鍑芥暟鏄鍛婅瘔緋葷粺錛岀粰鎴戝噯澶囧ソ涓涓猻ocket閫氶亾錛屾垜瑕佸拰鍏跺畠榪涚▼閫氫俊浜嗐傚嚱鏁扮殑榪斿洖鍊煎緢閲嶈錛屾垜浠璁頒笅鏉ワ紝瀹冭〃紺虹郴緇熶負鎴戜滑鍑嗗濂界殑榪欎釜socket閫氶亾錛屽湪浠ュ悗鐨勬瘡涓猻ocket鐩稿叧鍑芥暟涓兘浼氱敤鍒幫紝濡傛灉榪欎釜鍊肩瓑浜嶴OCKET_ERROR錛岃〃紺哄嚱鏁版墽琛屽け璐ヤ簡銆傚嚱鏁扮殑鍙傛暟鎴戜滑鍒嗗埆緇欙細PF_INET銆丼OCK_STREAM鍜孖PPROTO_TCP銆?br />
int bind(SOCKET s, const sockaddr *addr, int namelen);
榪欎釜鍑芥暟鍙湁鏈嶅姟鍣ㄧ紼嬪簭浣跨敤錛屼綔鐢ㄦ槸涓庢煇涓猻ocket閫氶亾緇戝畾銆傚彲浠ョ敤榪斿洖鍊煎垽鏂鍑芥暟鎵ц緇撴灉鎬庝箞鏍鳳紝濡傛灉絳変簬SOCKET_ERROR錛岄偅灝辨槸澶辮觸浜嗐傜涓涓弬鏁皊錛屽氨鏄痵ocket()鍑芥暟鐨勮繑鍥炲鹼紱鍦ㄧ粨鏋刟ddr涓紝鎴戜滑瑕佺粰瀹氫竴涓鍙e彿錛沶amelen絳変簬緇撴瀯sockaddr鐨勫ぇ灝忋?br />
int listen(SOCKET s, int backlog);
榪欎釜鍑芥暟鍙湁鏈嶅姟鍣ㄧ紼嬪簭浣跨敤錛屼綔鐢ㄦ槸鐩戝惉璇ョ鍙c傝繑鍥炲間笌bind鍑芥暟鎰忎箟涓鏍楓?br />
int accept(SOCKET s, sockaddr *addr, int *addrlen);
榪欎釜鍑芥暟鍙湁鏈嶅姟鍣ㄧ紼嬪簭浣跨敤錛屼綔鐢ㄦ槸鍝嶅簲瀹㈡埛绔殑榪炴帴銆傝繑鍥炲間笌bind鍑芥暟鎰忎箟涓鏍楓?br />
int connect(SOCKET s, const sockaddr *name, int namelen);
榪欎釜鍑芥暟鍙湁瀹㈡埛绔▼搴忎嬌鐢紝浣滅敤鏄妸瀹㈡埛绔拰鏌愪釜璁$畻鏈虹殑鏌愪釜绔彛寤虹珛榪炴帴銆傝繑鍥炲間笌bind鍑芥暟鎰忎箟涓鏍楓傜涓涓弬鏁皊錛屽氨鏄痵ocket()鍑芥暟鐨勮繑鍥炲鹼紱鍦ㄧ粨鏋刵ame涓紝鎴戜滑瑕佺粰瀹氫竴涓鍙e彿鍜岀洰鐨勬満鍣ㄥ悕錛沶amelen絳変簬緇撴瀯sockaddr鐨勫ぇ灝忋?br />
int send(SOCKET s, char *buf, int len, int flags);
int recv(SOCKET s, char *buf, int len, int flags);
榪欎袱涓嚱鏁板氨鏄彂閫佹暟鎹拰鎺ユ敹鏁版嵁錛屽鎴風鍜屾湇鍔″櫒绔▼搴忛兘鑳界敤錛屽摢涓彂閫佸摢涓帴鏀朵笉鐢ㄨ浜嗗惂錛熷懙鍛點?br />浠庡嚱鏁扮殑榪斿洖鍊煎彲浠ユ鏌ュ嚱鏁版墽琛屾槸鍚︽垚鍔熴傚弬鏁頒腑buf鏄寚鍚戝彂閫佹垨鎺ユ敹鐨勬暟鎹殑鎸囬拡錛宭en鏄暟鎹暱搴︺俧lags鎴戜滑緇欎釜0灝卞彲浠ワ紙鍏跺疄鏄垜涓嶇煡閬撳叿浣撳惈涔夛級銆?br />
鏈鍚庡氨鏄叧闂璼ocket浜嗭紝榪欎釜寰堝鏄撳繕鎺夛紝浣嗚繖涓嚱鏁板緢閲嶈錛屼竴瀹氳鐢ㄣ?br />int closesocket(SOCKET s);
濂戒簡錛屽叧閿嚱鏁板氨榪欎箞鍑犱釜錛屼笅鍥炬槸榪欏嚑涓嚱鏁扮殑鎵ц欏哄簭錛?br />
client绔?service绔?br />
聽 | 聽 聽 |
聽 v 聽 聽 v
socket() socket()
聽 | 聽 聽 |
聽 | 聽 聽 v
聽 | 聽 bind()
聽 | 聽 聽 |
聽 | 聽 聽 v
聽 | 聽 listen()
聽 | 聽 聽 |
聽 | 聽 聽 v
聽 | 聽 accept() 鎸傝搗錛岀洿鍒版湁瀹㈡埛绔潵榪炴帴
聽 | 聽 聽 |
聽 v 聽 涓夋鎻℃墜榪囩▼ 聽 |
connect() <-------------> |
聽 | 聽 聽 |
聽 v 聽 鍙戦佹秷鎭?聽 v
聽 +---> send() ---------------> recv() <-------+
聽 | 聽 | 聽 聽 . |
聽 | 聽 | 聽 聽 . 澶勭悊娑堟伅 |
聽 | 聽 v 聽 鍝嶅簲娑堟伅 聽 . |
聽 +---- recv() <--------------- send() --------+
聽 | 聽 聽 |
聽 v 聽 聽 |
close() ---------------> recv()
聽 聽 |
聽 聽 v
聽 closesocket()
涓婂浘鎴戣寰楄兘寰堝ソ鐨勮鏄庡鎴風鍜屾湇鍔″櫒绔殑榪愯杞ㄨ抗銆?br />
浣跨敤浠ヤ笂鍑犱釜鍑芥暟鍦?linux 緋葷粺涓婂氨鍙垚鍔熷緩绔嬩竴涓猻ocket閫氫俊榪炶礬錛屼絾濡傛灉鍦╳indows緋葷粺涓婏紝榪樿鐢ㄥ埌鍙︿竴涓嚱鏁幫細
int WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData);
鍦╳indows緋葷粺涓婏紝棣栧厛瑕佹墽琛岃繖涓嚱鏁幫紝鎵浠ヨ鎶婅繖涓嚱鏁版斁鍦╯ocket()鍑芥暟鐨勫墠闈€?br />
鎴戝涓婇潰鐨勫嚱鏁拌繘琛屼簡涓浜涘皝瑁咃紝涓鴻妭鐪佺瘒騫咃紝鎴戝幓鎺夋墍鏈夋敞閲婂拰闈為噸瑕佺殑鍑芥暟錛屽湪榪欓噷鍙互鐪嬪埌鍚勪釜鍑芥暟鐨勫叿浣撶敤娉曪細
鍦?VC60 鐜涓嬭榪愯涓嬮潰鐨勫嚱鏁幫紝瑕佸寘鍚ご鏂囦歡 errno.h 鍜?winsock2.h錛岃繕鏈夛紝鍦ㄨ繛鎺ョ殑鏃跺欒榪炴帴涓妛s2_32.dll鏂囦歡銆?br />
榪欐槸澶存枃浠跺唴瀹癸細
class Socket {
public:
bool setup();
void close();
bool connect(string host, int port);
bool listen();
int accept();
int recv(char *buf, int len);
int recv(int new_fd, char *buf, int len);
int send(const char *msg, int len);
int send(int new_fd, const char *msg, int len);
private:
聽 int _fd;
};
榪欐槸瀹炵幇鏂囦歡鍐呭錛?br />bool Socket::setup() {
WSADATA wsd;
_fd = WSAStartup(MAKEWORD(2,2), &wsd);
if(_fd) {
return false;
}
_fd = ::socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (_fd == -1) {
return false;
}
return true;
}
bool Socket::listen() {
struct sockaddr_in my_addr;
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(52309);
my_addr.sin_addr.s_addr = INADDR_ANY;
if(::bind(_fd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == SOCKET_ERROR) {
return false;
}
if(::listen(_fd, BACKLOG) == SOCKET_ERROR) {
return false;
}
return true;
}
int Socket::accept()
{
int new_fd;
struct sockaddr_in their_addr;
int sin_size = sizeof(their_addr);
printf("accepting... \n");
new_fd = ::accept(_fd,
聽 (struct sockaddr *)&their_addr,
聽 &sin_size);
return new_fd == SOCKET_ERROR ? -1:new_fd;
}
bool Socket::connect(string host, int port) {
struct hostent *_h = gethostbyname(host.c_str());
if (_h == 0) {
return false;
}
struct in_addr *_addr = (struct in_addr *)_h->h_addr;
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_addr = *_addr;
sin.sin_port = htons(port);
if (::connect(_fd, (sockaddr *)&sin, sizeof(sin)) == SOCKET_ERROR) {
return false;
}
return true;
}
int Socket::recv(int new_fd, char *buf, int len)
{
int nb = ::recv(new_fd, buf, len, 0);
if (nb == -1) {
printf("Error! recv.\n");
}
return nb;
}
int Socket::recv(char *buf, int len) {
return recv(_fd, buf, len);
}
int Socket::send(const char *msg, int len) {
return send(_fd, msg, len);
}
int Socket::send(int new_fd, const char *msg, int len)
{
int nb = ::send(new_fd, msg, len, 0);
if (nb == -1) {
printf("Error! send.\n");
}
return nb;
}
void Socket::close() {
int trytimes = 0;
while(::closesocket(_fd) && trytimes < CLOSE_TRY_TIMES)
trytimes++;
if(trytimes == 10) {
printf("Cannot close socket!\n");
}
}
濂斤紝socket綾繪槸灝佽濂戒簡錛屼笅闈㈠氨鏄粍緇囦簡錛屾湇鍔″櫒绔拰瀹㈡埛绔槸涓嶄竴鏍風殑錛屼笅闈㈠垎鍒粰鍑轟唬鐮侊紝鍒拌繖閲屽凡緇忓氨寰堢畝鍗曚簡銆?br />
瀹㈡埛绔細
int main(int argc, char **argv)
{
printf("socket of client is run ...\n");
Socket s;
if (!s.connect("dezhi", 52309))
return 0;
char *msg = "ok, send a message.";
for (int i=0; i<10; i++) {
s.send(msg, 20);
printf("message = %s\n", msg);
}
s.send("q", 1);
s.close();
return 0;
}
鏈嶅姟鍣細
int main(int argc, char **argv) {
printf("socket of service is run ...\n");
Socket s;
s.listen();
int new_fd = s.accept();
char buf[8];
buf[7] = '\0';
while (1) {
if (s.recv(new_fd, buf, 5) != -1) {
聽 printf("%s\n", buf);
聽 if (buf[0] == 'q')
聽 break;
}
}
s.close();
}
涓嬮潰涓鴻繍琛岀粨鏋滐細
瀹㈡埛绔細
socket of client is run ...
Socket: WSAStartup success execute.
Socket: socket success execute.
Socket: Establish the connection to "127.0.0.1:52309"
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
message = ok, send a message.
Socket: Close connection to "127.0.0.1:52309"
Press any key to continue
鏈嶅姟鍣ㄧ
socket of service is run ...
Socket: WSAStartup success execute.
Socket: socket success execute.
bind ok!
listen ok!
accepting...
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
ok, send a message.
qk, send a message.
Press any key to continue
灝卞埌榪欓噷鍚с俿ocket鐨勭浉鍏沖唴瀹瑰彲榪滀笉姝㈣繖浜涳紝鎴戝湪榪欓噷鍙槸緇欏ぇ瀹舵潵涓姏鐮栧紩鐜夛紝鎯蟲繁絀訛紵璺繕寰堟極闀褲傚叧浜庤緇嗙殑瀹炵幇浠g爜錛屽幓鎴戠殑銆婃簮鐮併嬩笂鎵懼惂錛屼笉鏀懼湪榪欓噷錛屾槸涓轟簡璁╃瘒騫呭皬浜涖?/font>
]]>
int聽SOCK_STREAM
鍏堣繛鎺ュ埌涓鍙頒富鏈虹劧鍚庣敤嫻佹柟寮忎紶閫佹暟鎹?br />
int聽SOCK_DGRAM
涓嶈繛鎺?鍦ㄦ暟鎹寘涓寘鍚洰鏍囧湴鍧,鐒跺悗鐩存帴閫佸嚭,鍖呭湪浼犻佽繃紼嬩腑鍙兘涓㈠け鍜岄敊浣?br />
int聽SOCK_RAW
socket鏁版嵁鐨勫簳灞備紶杈?瀵逛簬涓鑸▼搴忔病鏈変粈涔堟剰涔?br />
鍦板潃鐨勮〃紺烘柟娉?br />
鐩稿叧搴?sys/socket.h
鐩稿叧鏁版嵁緇撴瀯:struct聽sockaddr聽*
sockaddr涓殑涓や釜鍏冪礌:
===short聽int聽sa_family:鎸囧嚭鍦板潃鐨勬牸寮?br />===char聽sa_data[14]:鍦板潃鍊?br />
鍦板潃鐨勬牸寮?
AF_LOCAL:鏈湴鍚嶇О絀洪棿(name聽space)鐨勫湴鍧
AF_UNIX:鍜孉F_LOCAL鐩稿悓,浣咥F_UNIX鏄疷NIX98鏍囧噯
AF_FILE:AF_LOCAL鐨勫彟涓涓悓涔夎瘝
AF_INET:浜掕仈緗戝悕縐扮┖闂?瀵瑰簲鐨勫悕縐扮┖闂村悕涓篜F_INET
AF_INET6:IPv6浜掕仈緗戝悕縐扮┖闂?br />AF_UNSPEC:鐢ㄥ埌鐨勫湴鏂瑰緢灝?姣斿娓呴櫎"甯﹁繛鎺?鐨凞ATAGRAM鐨勭洰鏍囧湴鍧絳?瀵瑰簲鐨勫悕縐扮┖闂村湪鏂扮増鏈殑libc涓凡緇忚鍘誨
璁劇疆socket鍦板潃(鍦╯ys/socket.h涓?
浣跨敤bind鍑芥暟灝嗘煇涓湴鍧鍒嗛厤緇欐煇涓猻ocket
int聽bind(int聽socket,struct聽sock_addr聽*addr,socklen_t聽length);
灝唋ength闀垮害鐨勫湴鍧sock_addr鍒嗛厤緇檚ocket
榪斿洖0浠h〃鎴愬姛,榪斿洖-1浠h〃澶辮觸
璇誨彇socket鍒嗛厤鍒扮殑鍦板潃(鍦╯ys/socket.h涓?
浣跨敤getsockname鍑芥暟鏉ュ緱鍒頒竴涓猻ocket瀵瑰簲鐨勫湴鍧
int聽getsockname(int聽socket,struct聽sockaddr聽*addr,socklen_t聽*length-ptr);
灝唖ocket涓殑淇℃伅鏀劇疆鍒?addr鍜?length-ptr鎵鎸囧畾鐨勭┖闂翠腑
榪斿洖鍊?琛ㄧず鎴愬姛-1琛ㄧず澶辮觸
緗戠粶鐣岄潰Interface鐨勭浉鍏沖彉閲忓拰鍑芥暟
浠ヤ笅鍐呭鍦ㄥ簱鏂囦歡net/if.h涓?br />
size_t聽IFNAMSIZ
琛ㄧず鍑哄綰崇晫闈㈠悕縐扮殑緙撳啿鍖虹殑澶у皬,鍖呮嫭緇撴潫絎?
unsigned聽int聽nametoindex(const聽char聽*ifname);
榪斿洖ifname鎵鎸囧嚭鐨勭綉緇滅晫闈㈢殑搴忓彿,榪斿洖0琛ㄧず姝ょ晫闈笉瀛樺湪
char聽*if_indextoname(unsigned聽int聽ifindex,char聽*ifname);
鎵懼埌涓涓綉緇滅晫闈㈠簭鍙峰搴旂殑鐣岄潰鍚嶇О,榪斿洖鍊煎湪ifname瀵瑰簲鐨勯偅孌靛唴瀛樼┖闂翠笂,榪欐絀洪棿鑷沖皯鏈塈FNAMSIZ澶?榪斿洖ifname琛ㄧず鎴愬姛,榪斿洖NULL琛ㄧず澶辮觸
struct聽if_nameindex
榪欎釜鍙橀噺鐢ㄤ簬瀛樺偍鍗曚釜緗戠粶鐣岄潰鐨勪俊鎭?鍏朵腑鍏鋒湁涓や釜鍏冪礌:
unsigned聽int聽if_index:鐣岄潰搴忓彿
char聽*if_name:鐢╪ull緇撳熬鐨勭晫闈㈠悕縐?br />
struct聽if_nameindex聽*if_nameindex(void);
榪斿洖涓涓猻truct聽if_nameindex鍒楄〃,鍏朵腑瀛樺偍浜嗘墍鏈夌晫闈㈢殑淇℃伅,鏈鍚庝竴涓猧f_nameindex鐨刬f_index搴忓彿涓洪浂,if_name涓簄ull
姝ゅ嚱鏁板緱鍒扮殑緇撴灉蹇呴渶鐢╥f_freenameindex鍑芥暟娓呴櫎
void聽if_freenameindex(struct聽if_nameindex聽*ptr);
娓呴櫎if_nameindex寰楀埌鐨勭粨鏋?br />
鏈湴鍚嶇О絀洪棿(local聽namespace)
鏈湴鍚嶇О絀洪棿琛ㄧず涓篜F_LOCAL(POSIX),PF_UNIX,PF_FILE
鏈湴鍚嶇О鏄竴涓枃浠跺悕,鍙兘鏈湴璋冪敤涓嶈兘浠庡叾浠栦富鏈轟笂榪炴帴
鏈湴socket緇撴瀯(鍦╯ys/socket.h涓?
struct聽sockaddr_un
鍏朵腑鍖呭惈鐨勫厓绱犱負
short聽int聽sun_family:鍦板潃鐨勬牸寮忓簲褰撹涓篈F_LOCAL
char聽sun_path[108]:鎵瑕佷嬌鐢ㄧ殑鏂囦歡鐨勬枃浠跺悕(鏆傛椂瀹氫負108浣嶏紝鍙兘鏂扮殑鐗堟湰涓細鏈夋墍鏀瑰彉)
sun_len鍑芥暟:
int聽SUN_LEN(struct聽sun聽family聽*);
鍏蜂綋璇村簲褰撴槸SUN_LEN瀹忥紝鐢ㄦ潵緇熻鏌愪釜sockaddr_un緇撴瀯鐨勫厓绱犻暱搴﹀拰鏂囦歡鍚嶉暱搴?涓嶆槸鍒嗛厤鐨勫瓧鑺傜┖闂寸殑闀垮害)
涓涓垱寤烘湰鍦皊ocket鐨勪緥瀛?br />#include聽<stddef.h>
#include聽<stdio.h>
#include聽<errno.h>
#include聽<stdlib.h>
#include聽<sys/socket.h>
#include聽<sys/un.h>
int聽make_named_socket聽(const聽char聽*filename)//姝ゅ嚱鏁頒綔鐢ㄦ槸鐢╢ilename鍒涘緩socket
{
聽聽struct聽sockaddr_un聽name;//socket鍦板潃鍚峮ame
聽聽int聽sock;聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽//socket
聽聽size_t聽size;
聽聽/*聽Create聽the聽socket.聽*/
聽聽sock聽=聽socket聽(PF_LOCAL,聽SOCK_DGRAM,聽0);//PF_LOCAL琛ㄧず鏈湴socket
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽//SOCK_DGRAM琛ㄧず鏁版嵁鎶ユ柟寮?br />聽聽if聽(sock聽<聽0)//濡傚垱寤哄け璐ュ垯鎶ラ敊
聽聽聽聽{
聽聽聽聽聽聽perror聽("socket";
聽聽聽聽聽聽exit聽(EXIT_FAILURE);
聽聽聽聽}
聽聽/*聽Bind聽a聽name聽to聽the聽socket.聽*/
聽聽name.sun_family聽=聽AF_LOCAL;
聽聽strncpy聽(name.sun_path,聽filename,聽sizeof聽(name.sun_path));
聽聽/*聽鍦板潃鐨勯暱搴︿負sockaddr
聽聽聽聽聽緇撴瀯涓璮ilename寮濮嬬鐨勫亸縐婚噺
聽聽聽聽聽鍔犱笂filename涓枃浠跺悕鐨勯暱搴?br />聽聽聽聽聽鍔犱笂涓涓瓧鑺?姝ゅ瓧鑺備負緇撴潫鏍囪瘑)
聽聽聽聽聽鎴栬呰繕鍙互鐢ㄥ畯SUN_LEN:
聽聽聽聽聽size聽=聽SUN_LEN聽(&name);
聽*/
聽聽size聽=聽(offsetof聽(struct聽sockaddr_un,聽sun_path)
聽聽聽聽聽聽聽聽聽聽+聽strlen聽(name.sun_path)聽+聽1);//寮濮嬭綆?br />
聽聽if聽(bind聽(sock,聽(struct聽sockaddr聽*)聽&name,聽size)聽<聽0)
聽聽聽聽{
聽聽聽聽聽聽perror聽("bind";
聽聽聽聽聽聽exit聽(EXIT_FAILURE);
聽聽聽聽}
聽聽return聽sock;
}
鍏充簬鐢熸垚涓繪満鍦板潃鐨勫嚱鏁?br />
inet_aton(const聽char聽*name,struct聽in_addr聽*addr);
灝嗕互瀛楃涓茶〃紺虹殑鍦板潃杞崲鎴愪富鏈哄湴鍧騫跺偍瀛樺湪struct聽in_addr涓?br />
uint32_t聽inet_addr(const聽char聽*name);
灝嗗瓧絎︿覆IPv4鍦板潃杞崲鎴愪富鏈哄湴鍧騫惰繑鍥?濡傚け璐ュ垯榪斿洖INADDR_NONE(255.255.255.255);
uint32_t聽inet_network(const聽char聽*name);
灝嗗仠鐢?br />
char聽*inet_ntoa(struct聽in_addr聽addr);
灝咺Pv4涓繪満鍦板潃杞崲鎴愬瓧絎︿覆
娉ㄦ剰:姝ゅ嚱鏁扮殑榪斿洖鐨勫瓧絎︿覆瀛樺偍鍦ㄤ竴孌祍tatic綾誨瀷鐨勫唴瀛樼┖闂翠腑,涓嬫璋冪敤浼氳鐩栧師鍏堢殑緇撴灉,鍦ㄥ綰跨▼紼嬪簭鐨勮繍琛屼腑浼氬嚭鐜版販涔?鎵浠ユ帹鑽愪嬌鐢ㄤ笅鏂囦腑浠嬬粛鐨刬net_ntop
struct聽in_addr聽inet_makeaddr(uint32_t聽net,uint32_t聽local);
灝嗙綉緇滃彿net鍜屼富鏈哄悕local緇勫悎鎴怚Pv4涓繪満鍦板潃騫惰繑鍥?br />
uint32_t聽inet_lnaof(struct聽in_addr聽addr);
浠嶪Pv4緗戠粶鍦板潃涓彇鍑轟富鏈哄悕騫惰繑鍥?灝嗗仠鐢?
uint32_t聽inet_netof(struct聽in_addr聽addr);
浠嶪Pv4緗戠粶鍦板潃涓彇鍑虹綉緇滃彿騫惰繑鍥?灝嗗仠鐢?
int聽inet_pton(int聽af,const聽char聽*cp,void聽*buf);
灝咺Pv4鎴朓Pv6瀛楃涓插湴鍧杞崲鎴愮綉緇滀富鏈哄湴鍧
af:緗戠粶鍦板潃鐨勬牸寮?鍙彇鍊間負AF_INET鍜孉F_INET6
cp:鎸囧悜瀛楃涓查鍦板潃鐨勬寚閽?br />buf:鎸囧悜緇撴灉瀛樺偍絀洪棿鐨勬寚閽?搴斿綋棰勫厛鍒嗛厤濂借凍澶熺殑鍐呭瓨絀洪棿瀛樺偍緇撴灉)
const聽char聽*inet_ntop(int聽af,const聽void聽*cp,char聽*buf,size_t聽len);
灝咺Pv4鎴朓Pv6緗戠粶涓繪満鍦板潃杞崲鎴愬瓧絎︿覆
af:緗戠粶鍦板潃鐨勬牸寮?鍙彇鏁頒負AF_INET鍜孉F_INET6
cp:鎸囧悜闇瑕佽漿鎹㈢殑緗戠粶鍦板潃
buf:鎸囧悜瀛樺偍杞崲緇撴灉鐨勫唴瀛樼┖闂?br />len:buf鎵鎸囧悜鐨勭┖闂寸殑闀垮害
榪斿洖鍊間負buf
涓繪満鍚嶆暟鎹簱鏌ヨ鐨勭浉鍏沖彉閲?br />
struct聽hostent
鍏朵腑鍏冪礌:
char聽*h_name:涓繪満鐨?瀹樻柟"鍚嶇О
char聽**h_aliases:姝や富鏈虹殑鎵鏈夊埆鍚?br />int聽h_addrtype:鍦板潃綾誨瀷,鍙互涓篈F_INET(IPv4綾?鍜孉F_INET6(IPv6綾?,涔熷彲浠ュ嚭鐜板埆鐨勫?br />int聽h_length:鍦板潃鐨勫ぇ灝?鐢ㄥ瓧鑺傛暟璁$畻)
char聽**h_addr_list:姝や富鏈哄悕瀵瑰簲鐨勬墍鏈塈P,浠ヤ竴涓猲ull鎸囬拡緇撴潫
char聽*h_addr:絳変簬h_addr_list[0]
涓繪満鍚嶅拰鏁版嵁搴撴煡璇㈢浉鍏沖嚱鏁?br />
struct聽hostent聽*gethostbyname(const聽char聽*name);
榪斿洖涓繪満鍚峮ame鐨勪俊鎭?濡傛灉鏌ヨ澶辮觸鍒欒繑鍥炰竴涓猲ull鎸囬拡
struct聽hostent聽*gethostbyname2(const聽char聽*name,int聽af);
鍜実ethostbyname鐩擱?涓嶈繃鍙互鍦╝f涓寚鍑哄湴鍧鏍煎紡,鍙彇AF_INET鎴朅F_INET6,鍒嗗埆浠h〃IPv4鍜孖Pv6
struct聽hostent聽*gethostbyaddr(const聽char聽*addr,size_t聽length,int聽format);
榪斿洖鎸囧畾緗戠粶涓繪満鐨勪俊鎭?addr騫墮潪鎸囧悜瀛楃涓茶屾槸鎸囧悜涓涓綉緇滃湴鍧,length涓篴ddr涓湴鍧鐨勯暱搴?format涓哄湴鍧鐨勬牸寮?鍙彇AF_INET鎴朅F_INET6)
鍒涘緩socket
鎵闇鍑芥暟
int聽socket(int聽namespace,int聽style,int聽protocol);
namespace:socket綾誨瀷(姣斿PF_LOCAL鍜孭F_INET)
style:浼犺緭鏂瑰紡(鍙彇SOCK_STREAM鍜孲OCK_DGRAM)
protocol:鍗忚,涓鑸彇0
鍏抽棴socket
鎵闇鍑芥暟
int聽shutdown(int聽socket,int聽how);
鍏抽棴socket
榪斿洖0鎴愬姛,榪斿洖-1澶辮觸
how鍙彇鍊間負
0:鍋滄鎺ユ敹鏁版嵁
1:鍋滄閫佸嚭鏁版嵁
2:鍋滄鎺ユ敹鍜岃鍙?br />
socket瀵?socket聽pair)
涓や釜鍙互浜掔浉浼犻佺殑鏈湴socket,鍜宲ipe綾諱技,涓嶈繃pipe涓哄崟鍚?socket瀵逛負鍙屽悜
鍒涢爏ocket瀵規墍闇鍑芥暟
int聽socketpair(int聽namespace,int聽style,int聽protocol,int聽filedes[2]);
namespace:蹇呴渶涓篈F_LOCAL
style:鍙互鍙朣OCK_STREAM鎴栬匰OCK_DGRAM
filedes[2]:鍒涘緩鐨剆ocket瀵規斁鍦ㄨ繖閲?img src ="http://www.shnenglu.com/tx7do/aggbug/5960.html" width = "1" height = "1" />
]]>
錛堜互涓嬪畾涔変粠Winsock2.h鏂囦歡涓埅鍙栵級
/*
聽* The new type to be used in all
聽* instances which refer to sockets.
聽*/
typedef UINT_PTR聽聽聽聽聽聽聽 SOCKET;//SOCKET鍘熸潵灝辨槸涓涓猽nsigned int鐨勬寚閽堣屽凡
聽* Select uses arrays of SOCKETs.聽 These macros manipulate such
聽* arrays.聽 FD_SETSIZE may be defined by the user before including
聽* this file, but the default here should be >= 64.
聽*
聽* CAVEAT IMPLEMENTOR and USER: THESE MACROS AND TYPES MUST BE
聽* INCLUDED IN WINSOCK2.H EXACTLY AS SHOWN HERE.
聽*/
#ifndef FD_SETSIZE
#define FD_SETSIZE聽聽聽聽聽 64
#endif /* FD_SETSIZE */
typedef struct fd_set {
聽聽聽聽聽聽聽 u_int fd_count;聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* how many are SET? */
聽聽聽聽聽聽聽 SOCKET聽 fd_array[FD_SETSIZE];聽聽 /* an array of SOCKETs */
} fd_set;//fd_set鏄敤鏉elect鐨勶紝琛ㄧず涓涓泦鍚堬紝STL涓笉鏄湁涓ā鏉跨被set涔?br />//瀵筬d_set緇撴瀯錛學insock2.h涓繕瀹氫箟浜嗗洓涓畯瀹氫箟鏉ユ搷浣渇d_set
//FD_CLR(fd, set),FD_SET(fd, set),FD_ZERO(set),FD_ISSET(fd, set)
//涓鑸敤娉曟槸鍏堝畾涔変竴涓猣d_set,浣跨敤涔嬪墠璋冪敤fd_zero錛屽啀灝嗕竴涓猻ocket鏀懼埌fd_set涓?br />//緇忚繃涓緋誨垪鎿嶄綔鍚庯紝鐢╢d_isset鍒ゆ柇鏌愪釜socket鏄惁榪樺湪set涓?br />//SOCKET fd;
//......
//fd_set ReadFds;
//FD_ZERO(&ReadFds);
//FD_SET(fd,&ReadFds);
//.....
//if ( FD_ISSET(fd,&ReadFds) )
//.....
/*
聽* Structure used in select() call, taken from the BSD file sys/time.h.
聽*/
struct timeval {
聽聽聽聽聽聽聽 long聽聽聽 tv_sec;聽聽聽聽聽聽聽聽 /* seconds */
聽聽聽聽聽聽聽 long聽聽聽 tv_usec;聽聽聽聽聽聽聽 /* and microseconds */
};//榪欎釜涔熸槸鐢ㄤ簬select鍑芥暟涓殑錛岃秴鏃跺弬鏁?br />struct聽 hostent {//琛ㄧず涓繪満鐨勭粨鏋?br />聽聽聽聽聽聽聽 char聽聽聽 FAR * h_name;聽聽聽聽聽聽聽聽聽聽 /* official name of host */
聽聽聽聽聽聽聽 char聽聽聽 FAR * FAR * h_aliases;聽 /* alias list */
聽聽聽聽聽聽聽 short聽聽 h_addrtype;聽聽聽聽聽聽聽聽聽聽聽聽 /* host address type */
聽聽聽聽聽聽聽 short聽聽 h_length;聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* length of address */
聽聽聽聽聽聽聽 char聽聽聽 FAR * FAR * h_addr_list; /* list of addresses */
#define h_addr聽 h_addr_list[0]聽聽聽聽聽聽聽聽聽 /* address, for backward compat */
};
/*
聽* Internet address (old style... should be updated)//鏅曪紝浠涔堟椂鍊檜pdate錛?br />聽*///鍘熸潵姣忔鐪嬪埌in_addr緇撴瀯閮戒笉鐭ラ亾涓轟粈涔堝彨in_addr,鍘熸潵鏄繖鏍楓傘傘?br />struct in_addr {
聽聽聽聽聽聽聽 union {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 struct { u_char s_b1,s_b2,s_b3,s_b4; } S_un_b;
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 struct { u_short s_w1,s_w2; } S_un_w;
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 u_long S_addr; //澶ч儴鍒嗛兘鐢ㄨ繖涓彉閲忓氨澶熶簡錛堜竴涓猧p鍦板潃32浣嶅垰濂戒竴涓猽nsigned long錛?br />聽聽聽聽聽聽聽 } S_un;
#define s_addr聽 S_un.S_addr //榪欐牱瀹氫箟浠ュ悗鐢ㄧ殑寰堟柟渚匡紝in_addr.s_addr灝卞彲浠ヤ簡銆?br />聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* can be used for most tcp & ip code */
#define s_host聽 S_un.S_un_b.s_b2
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* host on imp */
#define s_net聽聽 S_un.S_un_b.s_b1
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* network */
#define s_imp聽聽 S_un.S_un_w.s_w2
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* imp */
#define s_impno S_un.S_un_b.s_b4
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* imp # */
#define s_lh聽聽聽 S_un.S_un_b.s_b3
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* logical host */
};
//榪檅1錛宐2錛宐3錛宐4錛寃1錛寃2涓嶇煡閬撴湁涔滅敤錛屼唬琛ㄤ箿鎰忔濄傘傘?br />#endif
/*
聽* Socket address, internet style.
聽*/
struct sockaddr_in {
聽聽聽聽聽聽聽 short聽聽 sin_family;//鍦板潃瀹舵棌涓鑸兘鏄疉F_INET鎴栬匬F_INET
聽聽聽聽聽聽聽 u_short sin_port;//绔彛
聽聽聽聽聽聽聽 struct聽 in_addr sin_addr;//ip鍦板潃
聽聽聽聽聽聽聽 char聽聽聽 sin_zero[8];
};
/*
聽* Structure used by kernel to store most//璁$畻鏈哄唴鏍鎬腑澶勭悊鐢ㄧ殑鏄繖縐嶈〃紺?br />聽* addresses.
聽*/
struct sockaddr {
聽聽聽聽聽聽聽 u_short sa_family;聽聽聽聽聽聽聽聽聽聽聽聽聽 /* address family */
聽聽聽聽聽聽聽 char聽聽聽 sa_data[14];聽聽聽聽聽聽聽聽聽聽聽 /* up to 14 bytes of direct address */
};
//浠旂粏綆椾竴涓媠ockaddr_in鍜宻ockaddr涓や釜緇撴瀯鐨勫ぇ灝忔槸涓鏍鳳紝鎵浠ュ彲浠ョ洿鎺ュ己鍒剁被鍨嬭漿鎹㈣祴鍊?br />//姣斿accept鍑芥暟鍏朵腑涓涓弬鏁扮被鍨媠truct sockaddr FAR * 錛屼綘濡傛灉鏈変竴涓猻truct sockaddr_in myaddr
//灝卞彲浠ョ洿鎺ccept(..(struct sockaddr *)myaddr.....
/*
聽* WinSock 2 extension -- WSABUF and QOS struct, include qos.h
聽* to pull in FLOWSPEC and related definitions
聽*/
typedef struct _WSABUF {//緙撳啿鍖猴紝涓鑸琺s鍦ㄥ甫WSA鍓嶇紑鐨刟ccept錛宺eceive錛宻end絳夊嚱鏁頒腑鎵嶇敤鍒?br />聽聽聽 u_long聽聽聽聽聽 len;聽聽聽聽 /* the length of the buffer */
聽聽聽 char FAR *聽 buf;聽聽聽聽 /* the pointer to the buffer */
} WSABUF, FAR * LPWSABUF;
typedef struct WSAData {
聽聽聽聽聽聽聽 WORD聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 wVersion;
聽聽聽聽聽聽聽 WORD聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 wHighVersion;
#ifdef _WIN64
聽聽聽聽聽聽聽 unsigned short聽聽聽聽聽聽聽聽聽 iMaxSockets;
聽聽聽聽聽聽聽 unsigned short聽聽聽聽聽聽聽聽聽 iMaxUdpDg;
聽聽聽聽聽聽聽 char FAR *聽聽聽聽聽聽聽聽聽聽聽聽聽 lpVendorInfo;
聽聽聽聽聽聽聽 char聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 szDescription[WSADESCRIPTION_LEN+1];
聽聽聽聽聽聽聽 char聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 szSystemStatus[WSASYS_STATUS_LEN+1];
#else
聽聽聽聽聽聽聽 char聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 szDescription[WSADESCRIPTION_LEN+1];
聽聽聽聽聽聽聽 char聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 szSystemStatus[WSASYS_STATUS_LEN+1];
聽聽聽聽聽聽聽 unsigned short聽聽聽聽聽聽聽聽聽 iMaxSockets;
聽聽聽聽聽聽聽 unsigned short聽聽聽聽聽聽聽聽聽 iMaxUdpDg;
聽聽聽聽聽聽聽 char FAR *聽聽聽聽聽聽聽聽聽聽聽聽聽 lpVendorInfo;
#endif
} WSADATA, FAR * LPWSADATA;//鍏跺疄榪欎釜緇撴瀯涓嶉渶瑕佹庝箞浜嗚В錛屽洜涓哄畠鍦ㄧ敤鐨勫緢灝戯紝灝辨槸鍦ㄨ皟鐢╓SAStartup鎵嶇敤鍒頒竴嬈?/font>
聽* Address families.
聽*/
#define AF_UNSPEC聽聽聽聽聽聽 0聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* unspecified */
/*
聽* Although聽 AF_UNSPEC聽 is聽 defined for backwards compatibility, using
聽* AF_UNSPEC for the "af" parameter when creating a socket is STRONGLY
聽* DISCOURAGED.聽聽聽 The聽 interpretation聽 of聽 the聽 "protocol"聽 parameter
聽* depends聽 on the actual address family chosen.聽 As environments grow
聽* to聽 include聽 more聽 and聽 more聽 address families that use overlapping
聽* protocol聽 values聽 there聽 is聽 more聽 and聽 more聽 chance of choosing an
聽* undesired address family when AF_UNSPEC is used.
聽*/
#define AF_UNIX聽聽聽聽聽聽聽聽 1聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* local to host (pipes, portals) */
#define AF_INET聽聽聽聽聽聽聽聽 2聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* internetwork: UDP, TCP, etc. */
#define AF_IMPLINK聽聽聽聽聽 3聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* arpanet imp addresses */
#define AF_PUP聽聽聽聽聽聽聽聽聽 4聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* pup protocols: e.g. BSP */
#define AF_CHAOS聽聽聽聽聽聽聽 5聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* mit CHAOS protocols */
#define AF_NS聽聽聽聽聽聽聽聽聽聽 6聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* XEROX NS protocols */
#define AF_IPX聽聽聽聽聽聽聽聽聽 AF_NS聽聽聽聽聽聽聽聽聽聽 /* IPX protocols: IPX, SPX, etc. */
#define AF_ISO聽聽聽聽聽聽聽聽聽 7聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* ISO protocols */
#define AF_OSI聽聽聽聽聽聽聽聽聽 AF_ISO聽聽聽聽聽聽聽聽聽 /* OSI is ISO */
#define AF_ECMA聽聽聽聽聽聽聽聽 8聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* european computer manufacturers */
#define AF_DATAKIT聽聽聽聽聽 9聽聽聽聽聽聽聽聽聽聽聽聽聽聽 /* datakit protocols */
#define AF_CCITT聽聽聽聽聽聽聽 10聽聽聽聽聽聽聽聽聽聽聽聽聽 /* CCITT protocols, X.25 etc */
#define AF_SNA聽聽聽聽聽聽聽聽聽 11聽聽聽聽聽聽聽聽聽聽聽聽聽 /* IBM SNA */
#define AF_DECnet聽聽聽聽聽聽 12聽聽聽聽聽聽聽聽聽聽聽聽聽 /* DECnet */
#define AF_DLI聽聽聽聽聽聽聽聽聽 13聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Direct data link interface */
#define AF_LAT聽聽聽聽聽聽聽聽聽 14聽聽聽聽聽聽聽聽聽聽聽聽聽 /* LAT */
#define AF_HYLINK聽聽聽聽聽聽 15聽聽聽聽聽聽聽聽聽聽聽聽聽 /* NSC Hyperchannel */
#define AF_APPLETALK聽聽聽 16聽聽聽聽聽聽聽聽聽聽聽聽聽 /* AppleTalk */
#define AF_NETBIOS聽聽聽聽聽 17聽聽聽聽聽聽聽聽聽聽聽聽聽 /* NetBios-style addresses */
#define AF_VOICEVIEW聽聽聽 18聽聽聽聽聽聽聽聽聽聽聽聽聽 /* VoiceView */
#define AF_FIREFOX聽聽聽聽聽 19聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Protocols from Firefox */
#define AF_UNKNOWN1聽聽聽聽 20聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Somebody is using this! */
#define AF_BAN聽聽聽聽聽聽聽聽聽 21聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Banyan */
#define AF_ATM聽聽聽聽聽聽聽聽聽 22聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Native ATM Services */
#define AF_INET6聽聽聽聽聽聽聽 23聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Internetwork Version 6 */
#define AF_CLUSTER聽聽聽聽聽 24聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Microsoft Wolfpack */
#define AF_12844聽聽聽聽聽聽聽 25聽聽聽聽聽聽聽聽聽聽聽聽聽 /* IEEE 1284.4 WG AF */
#define AF_IRDA聽聽聽聽聽聽聽聽 26聽聽聽聽聽聽聽聽聽聽聽聽聽 /* IrDA */
#define AF_NETDES聽聽聽聽聽聽 28聽聽聽聽聽聽聽聽聽聽聽聽聽 /* Network Designers OSI & gateway
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 enabled protocols */
#define AF_TCNPROCESS聽聽 29
#define AF_TCNMESSAGE聽聽 30
#define AF_ICLFXBM聽聽聽聽聽 31
聽* Protocol families, same as address families for now.
聽*/
#define PF_UNSPEC聽聽聽聽聽聽 AF_UNSPEC
#define PF_UNIX聽聽聽聽聽聽聽聽 AF_UNIX
#define PF_INET聽聽聽聽聽聽聽聽 AF_INET
#define PF_IMPLINK聽聽聽聽聽 AF_IMPLINK
#define PF_PUP聽聽聽聽聽聽聽聽聽 AF_PUP
#define PF_CHAOS聽聽聽聽聽聽聽 AF_CHAOS
#define PF_NS聽聽聽聽聽聽聽聽聽聽 AF_NS
#define PF_IPX聽聽聽聽聽聽聽聽聽 AF_IPX
#define PF_ISO聽聽聽聽聽聽聽聽聽 AF_ISO
#define PF_OSI聽聽聽聽聽聽聽聽聽 AF_OSI
#define PF_ECMA聽聽聽聽聽聽聽聽 AF_ECMA
#define PF_DATAKIT聽聽聽聽聽 AF_DATAKIT
#define PF_CCITT聽聽聽聽聽聽聽 AF_CCITT
#define PF_SNA聽聽聽聽聽聽聽聽聽 AF_SNA
#define PF_DECnet聽聽聽聽聽聽 AF_DECnet
#define PF_DLI聽聽聽聽聽聽聽聽聽 AF_DLI
#define PF_LAT聽聽聽聽聽聽聽聽聽 AF_LAT
#define PF_HYLINK聽聽聽聽聽聽 AF_HYLINK
#define PF_APPLETALK聽聽聽 AF_APPLETALK
#define PF_VOICEVIEW聽聽聽 AF_VOICEVIEW
#define PF_FIREFOX聽聽聽聽聽 AF_FIREFOX
#define PF_UNKNOWN1聽聽聽聽 AF_UNKNOWN1
#define PF_BAN聽聽聽聽聽聽聽聽聽 AF_BAN
#define PF_ATM聽聽聽聽聽聽聽聽聽 AF_ATM
#define PF_INET6聽聽聽聽聽聽聽 AF_INET6
涓嬮潰榪欎簺鍑芥暟灞炰簬鍩烘湰甯哥敤鍑芥暟錛屼笅嬈″涔?br />u_long htonl(u_long hostlong)
u_short htons(u_short hostshort)
u_long ntohl(u_long netlong)
u_short ntohs(u_short netshort)
unsigned long inet_addr(const char* cp);
int getpeername(SOCKET s,struct sockaddr* name,int* namelen);
int getsockname(SOCKET s,struct sockaddr* name,int* namelen);
char* FAR inet_ntoa(struct in_addr in);
struct HOSTENT* FAR gethostbyaddr(const char* addr,int len,int type);
struct hostent* FAR gethostbyname(const char* name);
int gethostname(char* name,int namelen);
int WSAGetLastError(void);
int WSAStartup(WORD wVersionRequested,LPWSADATA lpWSAData);
int ioctlsocket(SOCKET s,long cmd,u_long* argp);
int listen(SOCKET s,int backlog);
SOCKET accept(SOCKET s,struct sockaddr* addr,int* addrlen);
int send(SOCKET s,const char* buf,int len,int flags);
int recv(SOCKET s,char* buf,int len,int flags);
]]>
u_short htons(u_short hostshort)
u_long ntohl(u_long netlong)
u_short ntohs(u_short netshort)
榪欎笂闈㈠洓涓嚱鏁扮被浼鹼紝鍔熻兘鐩鎬技錛岄兘鐢ㄦ潵杞崲鏁版嵁鏍煎紡銆傜敤鏉ュ疄鐜板鐞嗗櫒涓璼hort錛宭ong鏁版嵁綾誨瀷涓庣綉緇滀腑鐨勮漿鎹€傚湪緗戠粶涓紶杈撳潎浠ュ瓧鑺備負鍗曚綅錛堥櫎浜哹it澶栧氨鏄渶灝忕殑鍗曚綅浜嗭級銆備竴涓猻hort鍗犱袱瀛楄妭錛屼竴涓猯ong鍗犲洓涓瓧鑺傘備竴涓猻hort浠庝竴鍙版満瀛愪紶鍒板彟澶栦竴鍙版満瀛愪笂瑕佽兘澶熻繕鍘燂紝鍒欏繀欏葷粺涓瑙勫畾楂樹綆瀛楄妭欏哄簭銆傚湪TCP/IP鍗忚瑙勮寖涓璼hort鐨勯珮浣嶅湪浣庡瓧鑺傦紝浣庝綅鍦ㄩ珮瀛楄妭銆傝繖涓庢湁浜涘鐞嗗櫒涓垨鑰呯郴緇熶腑琛ㄧず涓嶄竴鏍楓備緥濡傚湪windows涓細
聽unsigned short hs = 0x0102;
聽unsigned short ns = htons( hs );
聽printf( "0x%04x",ns);//ns:0x0201
鎵浠ュ浜庣綉緇滅鍙g瓑鏁版嵁鍦ㄤ嬌鐢ㄥ墠蹇呴』榪涜緇熶竴錛屼緥濡?br />unsigned short port = 2088錛?br />m_sockaddr.sin_port = htons( port );
絳夌瓑銆傝繖鍥涗釜鍑芥暟錛屾垜寮濮嬩笉鐭ラ亾涓轟粈涔堝彇榪欎簺鍚嶅瓧鎬繪槸璁頒笉浣忥紝鍚庢潵鎯蟲槑鐧戒簡
htons琛ㄧずhost to net short錛宯tohs琛ㄧずnet to host short
htonl琛ㄧずhost to net long錛宯tohl琛ㄧずnet to host long
榪欐牱涓嶉渶瑕佸埢鎰忓幓璁頒篃灝辨槑鐧戒簡銆?/p>
char* FAR inet_ntoa(struct in_addr in);
榪欎袱涓嚱鏁扮敤鏉ユ妸琛ㄧずip鍦板潃鐨勫瓧絎︿覆錛堝錛?02.114.14.12錛夎窡琛ㄧずip鐨刲ong鎴栬呯粨鏋勪箣闂磋漿鎹€?br />inet_addr寰楀埌鐨勬槸宸茬粡緇熶竴瀛楄妭欏哄簭鐨勶紝鍙互鐩存帴璧嬪肩粰in_addr閲岀殑s_adr錛屼緥濡傦細
聽char *pHost = "202.114.14.12"
聽m_sockaddr.sin_addr.s_addr聽=聽inet_addr( pHost );
鍔犺澆winsock搴撱傝繑鍥?琛ㄧず鎴愬姛錛岄潪0琛ㄧず閿欒銆傜涓涓弬鏁版槸鐗堟湰鍙鳳紝鐜板湪鏈楂樼増鏈槸2.2鐗堬紝涓嶈繃Win CE濂藉儚鍙敮鎸?.1鐗堬紝楂樹綅瀛楄妭琛ㄧず鍓増鏈彿錛屼綆浣嶅瓧鑺傝〃紺洪珮鐗堟湰鍙鳳紝鎵浠ヨ繖閲屼竴鑸氨鏄?x0202鎴栬?x0101鎴栬呬嬌鐢ㄥ畯瀹氫箟MAKEWORD(2,2)鎴栬匨AKEWORD(1,1)錛岀浜屼釜鍙傛暟鏄竴涓笌winsock搴撲俊鎭湁鍏崇殑緇撴瀯錛屼竴鎶婁笉鐢ㄥ幓綆″畠銆傚湪浣跨敤winsock鍓嶏紝閮藉繀欏誨姞杞斤紝涓鑸湪紼嬪簭鍒濆鍖栨椂鍊欏仛榪欎釜浜嬫儏銆備竴鑸嬌鐢ㄥ涓嬶細
聽WSADATA data;
聽if ( WSAStartup(0x0202,&data) != 0 )
聽{
聽聽printf("error id: %d",GetLastError());
聽}
涓婇潰鐨?font color="#ff6600">GetLastError()鏄嬌鐢ㄩ潪甯擱綣佺殑鍑芥暟銆傚緢澶氬嚱鏁扮殑榪斿洖鍊煎緱鎰忎箟閮芥槸琛ㄧず鍑芥暟鎵ц鏄惁鍑洪敊銆傚綋winsock鐨勫嚱鏁板彂鐢熼敊璇椂錛岀敤GetLastError()鍙互寰楀埌鏈鍚庝竴嬈″彂鐢熼敊璇殑閿欒鍙楓傚湪.Net涓湁涓伐鍏鳳細鏌ユ壘閿欒錛岃緭鍏ラ敊璇彿錛屽緱鍒伴敊璇俊鎭?/p>
鑾峰彇涓繪満鍚嶃傝緭鍏ュ弬鏁頒負緙撳啿鍖哄湴鍧鍜屽ぇ灝忋?br />struct hostent* FAR gethostbyname(const char* name);
鐢變富鏈哄悕寰楀埌涓繪満淇℃伅錛屽彲浠ョ敤鏉ヨВ鏋愬煙鍚嶃傞渶瑕佹敞鎰忕殑鏄疢SDN涓殑涓孌佃瘽鈥淭he application must never attempt to modify this structure or to free any of its components. Furthermore, only one copy of this structure is allocated per thread, so the application should copy any information it needs before issuing any other Windows Sockets function calls鈥濊繖璇存槑浜嗕竴鑸敤娉曠殑鏃跺欙紝瑕佹妸鏁版嵁鎷瘋礉鍑烘潵錛岀湅鐪嬩笅闈唬鐮侊細
聽char聽聽聽name[255];
聽PHOSTENT聽聽phostinfo;
聽PHOSTENT聽聽phostinfo1;
聽WSADATA data;
聽struct in_addr** addrPtr;
聽struct in_addr** addrPtr1;
聽{
聽聽printf("error id: %d",GetLastError());
聽}
聽{
聽聽printf("%s",name);
聽聽if((phostinfo = gethostbyname(name)) != NULL)
聽聽{
聽聽聽for (addrPtr = (struct in_addr **)phostinfo->h_addr_list;*addrPtr;addrPtr++)
聽聽聽{//鏄劇ず鎴戞満瀛愮殑ip
聽聽聽聽printf("%s\n", inet_ntoa(**addrPtr));
聽聽聽}
聽聽}
聽聽else
聽聽聽printf("error id : %d",GetLastError());
聽}
聽else
聽{
聽聽printf("error id :%d",GetLastError());
聽}
聽{
聽聽for (addrPtr1 = (struct in_addr **)phostinfo->h_addr_list;*addrPtr1;addrPtr1++)
聽聽{//鏄劇ずbbs.whnet.edu.cn鐨刬p錛?02.114.0.248
聽聽聽printf("%s\n", inet_ntoa(**addrPtr1));
聽聽}
聽}
聽else
聽聽printf("error id : %d",GetLastError());
聽{//鍦ㄨ繖閲屾樉紺虹殑鏄痓bs.whnet.edu.cn鐨刬p錛?02.114.0.248錛屼笉鏄垜鏈哄瓙鐨刬p
聽聽printf("%s\n", inet_ntoa(**addrPtr));
聽}
鏍規嵁ip鍦板潃寰楀埌涓繪満淇℃伅銆傝繖閲岀殑ip蹇呴』鏄綉緇滃瓧鑺傞『搴忕殑銆傜ず渚嬩唬鐮侊細
聽PHOSTENT phostinfo2;
聽unsigned long ip = inet_addr("127.0.0.1");
聽if ( (phostinfo2 = gethostbyaddr((char*)&ip,sizeof(ip),AF_INET)) != NULL)
聽{//鏄劇ずlocalhost
聽聽printf("host name : %s",phostinfo2->h_name );
聽}
聽else
聽聽printf("error id : %d",GetLastError());
榪欎釜鍑芥暟鐢ㄦ潵鐨勫緱鍒皊ocket鐨勬湰鍦板湴鍧錛屼絾鏄墠鎻愭槸socket蹇呴』宸茬粡bind鎴栬呭凡緇忔槸榪炴帴涓婄殑銆傚鏋渟ocket涓嶆槸闈㈠悜榪炴帴鐨勮瘽錛屾瘮濡倁dp錛岄偅寰梥ocket涓婃湁鏁版嵁鎵嶈銆?br />int getpeername(SOCKET s,struct sockaddr* name,int* namelen);
榪欎釜鍑芥暟鐢ㄦ潵寰楀埌socket閭d竴杈逛笂鐨勫湴鍧錛屾樉鐒秙ocket蹇呴』寰楄繛鎺ヤ笂銆傗淭he getpeername function can be used only on a connected socket. For datagram sockets, only the name of a peer specified in a previous connect call will be returned鈥攁ny name specified by a previous sendto call will not be returned by getpeername.鈥?/p>
]]>
銆銆鎵璋撳悓姝ワ紝灝辨槸鍦ㄥ彂鍑轟竴涓姛鑳借皟鐢ㄦ椂錛屽湪娌℃湁寰楀埌緇撴灉涔嬪墠錛岃璋冪敤灝變笉榪斿洖銆傛寜鐓ц繖涓畾涔夛紝鍏跺疄緇濆ぇ澶氭暟鍑芥暟閮芥槸鍚屾璋冪敤錛堜緥濡俿in, isdigit絳夛級銆備絾鏄竴鑸岃█錛屾垜浠湪璇村悓姝ャ佸紓姝ョ殑鏃跺欙紝鐗規寚閭d簺闇瑕佸叾浠栭儴浠跺崗浣滄垨鑰呴渶瑕佷竴瀹氭椂闂村畬鎴愮殑浠誨姟銆傛渶甯歌鐨勪緥瀛愬氨鏄?SendMessage銆傝鍑芥暟鍙戦佷竴涓秷鎭粰鏌愪釜紿楀彛錛屽湪瀵規柟澶勭悊瀹屾秷鎭箣鍓嶏紝榪欎釜鍑芥暟涓嶈繑鍥炪傚綋瀵規柟澶勭悊瀹屾瘯浠ュ悗錛岃鍑芥暟鎵嶆妸娑堟伅澶勭悊鍑芥暟鎵榪斿洖鐨?LRESULT鍊艱繑鍥炵粰璋冪敤鑰呫?/span>
銆銆寮傛鐨勬蹇靛拰鍚屾鐩稿銆傚綋涓涓紓姝ヨ繃紼嬭皟鐢ㄥ彂鍑哄悗錛岃皟鐢ㄨ呬笉鑳界珛鍒誨緱鍒扮粨鏋溿傚疄闄呭鐞嗚繖涓皟鐢ㄧ殑閮ㄤ歡鍦ㄥ畬鎴愬悗錛岄氳繃鐘舵併侀氱煡鍜屽洖璋冩潵閫氱煡璋冪敤鑰呫備互 CAsycSocket綾諱負渚嬶紙娉ㄦ剰錛孋Socket浠嶤AsyncSocket媧劇敓錛屼絾鏄搗鍔熻兘宸茬粡鐢卞紓姝ヨ漿鍖栦負鍚屾錛夛紝褰撲竴涓鎴風閫氳繃璋冪敤 Connect鍑芥暟鍙戝嚭涓涓繛鎺ヨ姹傚悗錛岃皟鐢ㄨ呯嚎紼嬬珛鍒誨彲浠ユ湞涓嬭繍琛屻傚綋榪炴帴鐪熸寤虹珛璧鋒潵浠ュ悗錛宻ocket搴曞眰浼氬彂閫佷竴涓秷鎭氱煡璇ュ璞°傝繖閲屾彁鍒版墽琛?閮ㄤ歡鍜岃皟鐢ㄨ呴氳繃涓夌閫斿緞榪斿洖緇撴灉錛氱姸鎬併侀氱煡鍜屽洖璋冦傚彲浠ヤ嬌鐢ㄥ摢涓縐嶄緷璧栦簬鎵ц閮ㄤ歡鐨勫疄鐜幫紝闄ら潪鎵ц閮ㄤ歡鎻愪緵澶氱閫夋嫨錛屽惁鍒欎笉鍙楄皟鐢ㄨ呮帶鍒躲傚鏋滄墽琛岄儴 浠剁敤鐘舵佹潵閫氱煡錛岄偅涔堣皟鐢ㄨ呭氨闇瑕佹瘡闅斾竴瀹氭椂闂存鏌ヤ竴嬈★紝鏁堢巼灝卞緢浣庯紙鏈変簺鍒濆澶氱嚎紼嬬紪紼嬬殑浜猴紝鎬誨枩嬈㈢敤涓涓驚鐜幓媯鏌ユ煇涓彉閲忕殑鍊鹼紝榪欏叾瀹炴槸涓縐嶅緢涓ラ噸 鐨勯敊璇級銆傚鏋滄槸浣跨敤閫氱煡鐨勬柟寮忥紝鏁堢巼鍒欏緢楂橈紝鍥犱負鎵ц閮ㄤ歡鍑犱箮涓嶉渶瑕佸仛棰濆鐨勬搷浣溿傝嚦浜庡洖璋冨嚱鏁幫紝鍏跺疄鍜岄氱煡娌″お澶氬尯鍒?br>
闃誨
銆銆闃誨璋冪敤鏄寚璋冪敤緇撴灉榪斿洖涔嬪墠錛屽綋鍓嶇嚎紼嬩細琚寕璧楓傚嚱鏁板彧鏈夊湪寰楀埌緇撴灉涔嬪悗鎵嶄細榪斿洖銆傛湁浜轟篃璁鎬細鎶婇樆濉炶皟鐢ㄥ拰鍚屾璋冪敤絳夊悓璧鋒潵錛屽疄闄呬笂浠栨槸涓嶅悓鐨勩傚浜庡悓 姝ヨ皟鐢ㄦ潵璇達紝寰堝鏃跺欏綋鍓嶇嚎紼嬭繕鏄縺媧葷殑錛屽彧鏄粠閫昏緫涓婂綋鍓嶅嚱鏁版病鏈夎繑鍥炶屽凡銆備緥濡傦紝鎴戜滑鍦–Socket涓皟鐢≧eceive鍑芥暟錛屽鏋滅紦鍐插尯涓病鏈夋暟 鎹紝榪欎釜鍑芥暟灝變細涓鐩寸瓑寰咃紝鐩村埌鏈夋暟鎹墠榪斿洖銆傝屾鏃訛紝褰撳墠綰跨▼榪樹細緇х畫澶勭悊鍚勭鍚勬牱鐨勬秷鎭傚鏋滀富紿楀彛鍜岃皟鐢ㄥ嚱鏁板湪鍚屼竴涓嚎紼嬩腑錛岄櫎闈炰綘鍦ㄧ壒孌婄殑鐣岄潰鎿?浣滃嚱鏁頒腑璋冪敤錛屽叾瀹炰富鐣岄潰榪樻槸搴旇鍙互鍒鋒柊銆俿ocket鎺ユ敹鏁版嵁鐨勫彟澶栦竴涓嚱鏁皉ecv鍒欐槸涓涓樆濉炶皟鐢ㄧ殑渚嬪瓙銆傚綋socket宸ヤ綔鍦ㄩ樆濉炴ā寮忕殑鏃跺欙紝 濡傛灉娌℃湁鏁版嵁鐨勬儏鍐典笅璋冪敤璇ュ嚱鏁幫紝鍒欏綋鍓嶇嚎紼嬪氨浼氳鎸傝搗錛岀洿鍒版湁鏁版嵁涓烘銆?/p>
銆銆闈為樆濉炲拰闃誨鐨勬蹇電浉瀵瑰簲錛屾寚鍦ㄤ笉鑳界珛鍒誨緱鍒扮粨鏋滀箣鍓嶏紝璇ュ嚱鏁頒笉浼氶樆濉炲綋鍓嶇嚎紼嬶紝鑰屼細绔嬪埢榪斿洖銆?/p>
銆銆瀵硅薄鏄惁澶勪簬闃誨妯″紡鍜屽嚱鏁版槸涓嶆槸闃誨璋冪敤鏈夊緢寮虹殑鐩稿叧鎬э紝浣嗘槸騫朵笉鏄竴涓瀵瑰簲鐨勩傞樆濉炲璞′笂鍙互鏈夐潪闃誨鐨勮皟鐢ㄦ柟寮忥紝鎴戜滑鍙互閫氳繃涓瀹氱殑API鍘昏疆璇㈢姸 鎬侊紝鍦ㄩ傚綋鐨勬椂鍊欒皟鐢ㄩ樆濉炲嚱鏁幫紝灝卞彲浠ラ伩鍏嶉樆濉炪傝屽浜庨潪闃誨瀵硅薄錛岃皟鐢ㄧ壒孌婄殑鍑芥暟涔熷彲浠ヨ繘鍏ラ樆濉炶皟鐢ㄣ傚嚱鏁皊elect灝辨槸榪欐牱鐨勪竴涓緥瀛愩?/p>
鍦╓insock涓疄鐜板紓姝ョ殑鏂規硶鏈夊緢澶氾紝Winsock鐨処O妯″瀷鏈変笅闈㈠叚縐?br> 涓錛歴elect妯″瀷
浜岋細WSAAsyncSelect妯″瀷
涓夛細WSAEventSelect妯″瀷
鍥涳細Overlapped I/O 浜嬩歡閫氱煡妯″瀷
浜旓細Overlapped I/O 瀹屾垚渚嬬▼妯″瀷
鍏細IOCP妯″瀷
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鏇懼湪緗戜笂鐪嬪埌涓浜涙瘮鍠葷敤鏉ュ緢濂界殑璇存槑榪欎簺妯″瀷錛屽湪榪欓噷寮曠敤涓涓嬨?br>鑰侀檲鏈変竴涓湪澶栧湴宸ヤ綔鐨勫コ鍎匡紝涓嶈兘緇忓父鍥炴潵錛岃侀檲鍜屽ス閫氳繃淇′歡鑱旂郴銆備粬浠殑淇′細琚偖閫掑憳鎶曢掑埌浠栦滑鐨勪俊綆遍噷銆?br>涓錛歴elect妯″瀷
鑰侀檲闈炲父鎯崇湅鍒板コ鍎跨殑淇°備互鑷充簬浠栨瘡闅?0鍒嗛挓灝變笅妤兼鏌ヤ俊綆憋紝鐪嬫槸鍚︽湁濂沖効鐨勪俊~~~~~
鍦ㄨ繖縐嶆儏鍐典笅錛?#8220;涓嬫ゼ媯鏌ヤ俊綆?#8221;鐒跺悗鍥炲埌妤間笂鑰借浜嗚侀檲澶鐨勬椂闂達紝浠ヨ嚦浜庤侀檲鏃犳硶鍋氬叾浠栧伐浣溿?/p>
浜岋細WSAAsyncSelect妯″瀷
鍚庢潵錛岃侀檲浣跨敤浜嗗井杞叕鍙哥殑鏂板紡淇$銆傝繖縐嶄俊綆遍潪甯稿厛榪涳紝涓鏃︿俊綆遍噷鏈夋柊鐨勪俊浠訛紝鐩栬尐灝變細緇欒侀檲鎵撶數璇濓細鍠傦紝澶х埛錛屼綘鏈夋柊鐨勪俊浠朵簡錛佷粠姝わ紝鑰侀檲鍐嶄篃涓嶅繀棰戠箒涓婁笅妤兼鏌ヤ俊綆變簡錛岀墮涔熶笉鐤間簡錛屼綘鐬呭噯浜嗭紝钃濆ぉ......涓嶆槸錛屽井杞瘇~~~~~~~
涓夛細WSAEventSelect妯″瀷
鍚庢潵錛屽井杞殑淇$闈炲父鐣呴攢錛岃喘涔板井杞俊綆辯殑浜轟互鐧句竾璁℃暟......浠ヨ嚦浜庣洊鑼ㄦ瘡澶?4灝忔椂緇欏鎴鋒墦鐢佃瘽錛岀瘡寰楄叞閰歌儗鐥涳紝鍠濊殎鍔涚閮戒笉濂戒嬌~~~~~~
寰蔣鏀硅繘浜嗕粬浠殑淇$錛氬湪瀹㈡埛鐨勫涓坊鍔犱竴涓檮鍔犺緗紝榪欎釜瑁呯疆浼氱洃瑙嗗鎴風殑淇$錛屾瘡褰撴柊鐨勪俊浠舵潵涓達紝姝よ緗細鍙戝嚭“鏂頒俊浠跺埌杈?#8221;澹幫紝鎻愰啋鑰侀檲鍘繪敹淇°傜洊鑼ㄧ粓浜庡彲浠ョ潯瑙変簡銆?/p>
鍥涳細Overlapped I/O 浜嬩歡閫氱煡妯″瀷
鍚庢潵錛屽井杞氳繃璋冩煡鍙戠幇錛岃侀檲涓嶅枩嬈笂涓嬫ゼ鏀跺彂淇′歡錛屽洜涓轟笂涓嬫ゼ鍏跺疄寰堟氮璐規椂闂淬備簬鏄井杞啀嬈℃敼榪涗粬浠殑淇$銆傛柊寮忕殑淇$閲囩敤浜嗘洿涓哄厛榪涚殑鎶鏈紝鍙鐢ㄦ埛鍛婅瘔寰蔣鑷繁鐨勫鍦ㄥ嚑妤煎嚑鍙鳳紝鏂板紡淇$浼氭妸淇′歡鐩存帴浼犻佸埌鐢ㄦ埛鐨勫涓紝鐒跺悗鍛婅瘔鐢ㄦ埛錛屼綘鐨勪俊浠跺凡緇忔斁鍒頒綘鐨勫涓簡錛佽侀檲寰堥珮鍏達紝鍥犱負浠栦笉蹇呭啀浜茶嚜鏀跺彂淇′歡浜嗭紒
浜旓細Overlapped I/O 瀹屾垚渚嬬▼妯″瀷
鑰侀檲鎺ユ敹鍒版柊鐨勪俊浠跺悗錛屼竴鑸殑紼嬪簭鏄細鎵撳紑淇″皝----鎺忓嚭淇$焊----闃呰淇′歡----鍥炲淇′歡......涓轟簡榪涗竴姝ュ噺杞葷敤鎴瘋礋鎷咃紝寰蔣鍙堝紑鍙戜簡涓縐嶆柊鐨勬妧鏈細鐢ㄦ埛鍙鍛婅瘔寰蔣瀵逛俊浠剁殑鎿嶄綔姝ラ錛屽井杞俊綆卞皢鎸夌収榪欎簺姝ラ鍘誨鐞嗕俊浠訛紝涓嶅啀闇瑕佺敤鎴蜂翰鑷媶淇?闃呰/鍥炲浜嗭紒鑰侀檲緇堜簬榪囦笂浜嗗皬璧勭敓媧伙紒
鍏細IOCP妯″瀷
寰蔣淇$浼間箮寰堝畬緹庯紝鑰侀檲涔熷緢婊℃剰銆備絾鏄湪涓浜涘ぇ鍏徃鎯呭喌鍗村畬鍏ㄤ笉鍚岋紒榪欎簺澶у叕鍙告湁鏁頒互涓囪鐨勪俊綆憋紝姣忕閽熼兘鏈夋暟浠ョ櫨璁$殑淇′歡闇瑕佸鐞嗭紝浠ヨ嚦浜庡井杞俊綆辯粡甯稿洜瓚呰礋鑽瘋繍杞屽穿婧冿紒闇瑕侀噸鏂板惎鍔紒寰蔣涓嶅緱涓嶄嬌鍑烘潃鎵嬮攺......
寰蔣緇欐瘡涓ぇ鍏徃媧句簡涓鍚嶅悕鍙?#8220;Completion Port”鐨勮秴綰ф満鍣ㄤ漢錛岃榪欎釜鏈哄櫒浜哄幓澶勭悊閭d簺淇′歡錛?/p>
鍏跺疄錛屼笂闈㈡瘡縐嶆ā鍨嬮兘鏈変紭鐐癸紝瑕佹牴鎹▼搴忛渶姹傝岄傚綋閫夋嫨鍚堥傜殑妯″瀷錛屽墠闈笁縐嶆ā鍨嬫晥鐜囧凡緇忔瘮杈冮珮錛屽疄鐜拌搗鏉ラ毦閬撲笉澶э紝寰堝涓鑸殑緗戠粶紼嬪簭閮介噰鐢ㄥ墠涓夌妯″瀷錛屽彧鏈夊緗戠粶瑕佹眰鐗瑰埆楂樼殑涓浜涙湇鍔″櫒鎵嶄細鑰冭檻鐢ㄥ悗闈㈢殑閭d簺妯″瀷銆侻FC涓殑CAsyncSocket綾誨氨鏄敤鐨刉SAAsyncSelect妯″瀷錛岀數椹翠腑涔熸槸鐢ㄧ殑榪欑錛屼笉榪囧湪瀵繪壘瀵瑰簲socket鐨勬椂鍊欒繘琛屼簡浼樺寲錛屾煡鎵炬洿蹇紝鍦℅ridCast涓噰鐢ㄧ殑鏄疻SAEventSelect妯″瀷錛岀瓑寰呫?/p>
3.涓涓畬鏁寸殑紼嬪簭
UNIX 鍩熸暟鎹姤濂楁帴瀛楃殑榪愯鏂瑰紡涓?UDP 鏁版嵁鎶ュ鎺ュ瓧鏈夋墍涓嶅悓銆傚熷姪 UDP 鏁版嵁鎶ュ鎺ュ瓧錛屽鎴鋒満紼嬪簭灝變笉蹇呰皟鐢?bind() 鍑芥暟錛屽師鍥犳槸緋葷粺浼氳嚜鍔ㄦ寚瀹氭湭浣跨敤鐨勭鍙e彿銆備簬鏄湇鍔″櫒鍙皢鏁版嵁鎶ュ彂閫佸洖璇ョ鍙e彿銆備絾鏄紝浣跨敤 UNIX 鍩熸暟鎹姤濂楁帴瀛楋紝緋葷粺涓嶄細鑷姩鎸囧畾瀹㈡埛鏈虹殑璺緞鍚嶃傚洜姝わ紝浣跨敤 UNIX 鍩熸暟鎹姤鐨勬墍鏈夊鎴鋒満紼嬪簭蹇呴』璋冪敤 bind() 鍑芥暟銆傚湪瀹㈡埛鏈虹殑 bind() 涓婃寚瀹氱殑綺劇‘璺緞鍚嶅氨鏄紶閫掕嚦鏈嶅姟鍣ㄧ殑璺緞鍚嶃傚洜姝わ紝濡傛灉瀹㈡埛鏈烘寚瀹氱浉瀵硅礬寰勫悕錛堝嵆錛屽茍闈炰互 / 寮澶寸殑鍏ㄩ檺瀹氳礬寰勫悕錛夛紝闄ら潪鏈嶅姟鍣ㄤ互鍚屼竴褰撳墠鐩綍榪愯錛屽惁鍒欏畠涓嶈兘鍚戝鎴鋒満鍙戦佹暟鎹姤銆?
搴旂敤紼嬪簭鍙兘瀵規鍦板潃緋誨垪浣跨敤鐨勭ず渚嬭礬寰勫悕灝辨槸 /tmp/myserver 鎴?servers/thatserver銆傚熷姪 servers/thatserver錛屽彲浣跨敤騫墮潪鍏ㄩ檺瀹氾紙鏈寚瀹?/錛夌殑璺緞鍚嶃傝繖琛ㄧず璇ラ」鍦ㄦ枃浠剁郴緇熷眰嬈$粨鏋勪腑鐨勪綅緗簲鏍規嵁褰撳墠宸ヤ綔鐩綍紜畾銆?
涓嬪浘涓句緥璇存槑浜?AF_UNIX 鍦板潃緋誨垪鐨勫鎴鋒満錛忔湇鍔″櫒鍏崇郴銆傛湁鍏沖皢鐜璁劇疆涓轟嬌鐢?AF_UNIX 鍦板潃緋誨垪鐨勮緇嗕俊鎭紝鍙傝濂楁帴瀛楃紪紼嬬殑鍏堝喅鏉′歡銆?
濂楁帴瀛椾簨浠舵祦錛氫嬌鐢?AF_UNIX 鍦板潃緋誨垪鐨勬湇鍔″櫒搴旂敤紼嬪簭
紺轟緥錛氫嬌鐢?AF_UNIX 鍦板潃緋誨垪鐨勬湇鍔″櫒搴旂敤紼嬪簭浣跨敤浠ヤ笅鍑芥暟璋冪敤搴忓垪錛?
AF_UNIX 鎴?AF_UNIX_CCSID 鏄敮鎸?socketpair() 鍑芥暟鐨勫敮涓鍦板潃緋誨垪銆?b>socketpair() 鍑芥暟榪斿洖鏈懡鍚嶇殑鍜屽凡榪炴帴鐨勫鎺ュ瓧鎻忚堪絎︺?
UNIX 鍩熷鎺ュ瓧鐨勫悕縐扮┖闂寸敱璺緞鍚嶇粍鎴愩傚綋濂楁帴瀛楃▼搴忚皟鐢?bind() 鍑芥暟鏃訛紝浼氬湪鏂囦歡緋葷粺鐩綍涓垱寤轟竴欏廣傚鏋滆礬寰勫悕宸插瓨鍦紝鍒?bind() 澶辮觸銆傚洜姝わ紝UNIX 鍩熷鎺ュ瓧紼嬪簭搴旀繪槸璋冪敤 unlink() 鍑芥暟浠ュ湪緇撴潫鏃墮櫎鍘昏鐩綍欏廣?
濂楁帴瀛椾簨浠舵祦錛氫嬌鐢?AF_UNIX 鍦板潃緋誨垪鐨勫鎴鋒満搴旂敤紼嬪簭
紺轟緥錛氫嬌鐢?AF_UNIX 鍦板潃緋誨垪鐨勫鎴鋒満搴旂敤紼嬪簭浣跨敤浠ヤ笅鍑芥暟璋冪敤搴忓垪錛?
AF_UNIX 鎴?AF_UNIX_CCSID 鏄敮鎸?socketpair() 鍑芥暟鐨勫敮涓鍦板潃緋誨垪銆?b>socketpair() 鍑芥暟榪斿洖鏈懡鍚嶇殑鍜屽凡榪炴帴鐨勫鎺ュ瓧鎻忚堪絎︺?