我绑定实施一个洪流客户端。我从这里得到我的信息:http://wiki.theory.org/BitTorrent_Tracker_Protocol。如何发送请求到洪流跟踪服务器
我想发送一个获取请求到跟踪器来获取对等列表。我应该建立一个udp连接并在端口80连接到udp://tracker.thepiratebay.org吗?这是我的请求消息应该看起来像什么?
"udp://tracker.thepiratebay.org??info_hash=123456789
&peer_id=ABCDEFGHIJKLMNOPQRST
port=6888
&downloaded=0
&left=0
&event=started "
这是我的我的代码部分:
char *requestToSend;
int sock;
struct sockaddr_in servAddr;
struct sockaddr_in fromAddr;
int fromSize;
int respStringLen;
int portNum =80;
char data_recv[ECHOMAX];
char *hash="123456789";
char *id="ABCDEFGHIJKLMNOPQRST";
char *temp ="udp://tracker.thepiratebay.org??info_hash=123456789\n&peer_id=ABCDEFGHIJKLMNOPQRST\nport=6888\n&downloaded=0\n&left=0\n&event=started";
requestToSend = malloc(sizeof(temp)+1);
sprintf(requestToSend, "%s??info_hash=%s\n&peer_id=%s\nport=%s\n&downloaded=0\n&left=0\n&event=started\0","udp://tracker.thepiratebay.org", hash,id,"6888");
printf("%s to send \n", requestToSend);
/* Create a datagram/UDP socket */
if ((sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0){
printf("fail create socket");
return 0;
}
/* Construct the server address structure */
struct hostent *hp = gethostbyname("udp://tracker.thepiratebay.org");
memset(&servAddr, 0, sizeof(servAddr)); /* Zero out structure */
servAddr.sin_family = AF_INET; /* Internet addr family */
memcpy((char *) &servAddr.sin_addr.s_addr, hp->h_addr, hp->h_length);
servAddr.sin_port = htons(portNum); /* Server port */
//send request to tracker server
if (send(sock, requestToSend, strlen(requestToSend), 0) != strlen(requestToSend)){
printf("fail send");
return 0;
}
/* Recv a response */
fromSize = sizeof(fromAddr);
if ((respStringLen = recvfrom(sock, data_recv, ECHOMAX, 0,
(struct sockaddr *) &fromAddr, &fromSize)) != strlen(requestToSend)){
printf("fail to recv");
return 0;
}
这是我从一个torrent文件
dict {
announce => str = http://tracker.thepiratebay.org/announce (len = 40)
announce-list => list [
list [
str = http://tracker.thepiratebay.org/announce (len = 40)
]
list [
str = udp://tracker.thepiratebay.org:80/announce (len = 42)
]
list [
str = http://tracker.openbittorrent.com/announce (len = 42)
]
list [
str = udp://tracker.openbittorrent.com:80/announce (len = 44)
]
]
creation date => int = 1174816388
encoding => str = UTF-8 (len = 5)
info => dict {
filehash => str =
¸¥£öüËXþÐS®(äfn6 (len = 20)
length => int = 2222949
name => str = Audacity.zip (len = 12)
name.utf-8 => str = Audacity.zip (len = 12)
piece length => int = 32768
pieces => str = (null) (len = 0)
}
}
d8:announce40:http://tracker.thepiratebay.org/announce13:announce-listll40:http: //tracker.thepiratebay.org/announceel42:udp://tracker.thepiratebay.org:80/announ ceel42:http://tracker.openbittorrent.com/announceel44:udp://tracker.openbittorre nt.com:80/announceee13:creation datei1174816388e8:encoding5:UTF-84:infod8:fileha sh20:
¸¥£öüËXþÐS®(äfn66:lengthi2222949e4:name12:Audacity.zip10:name.utf-812:Audacity.z yf3-ûBÎNrl lengthi32768e6:pieces1360:þ]úÙÉÅ'NÕæ+gd3fi6è6¶
尝试重新措辞你的问题。就目前而言,你的目标不是很清楚。你应该特别修改标题。 – Nocturno
您检查了gethostbyname是否返回有效地址?我认为你不应该为其功能添加http://或udp:// protocoll字符串部分。 – Phong