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opentracker
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url parser

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dynamic-accesslists
denis 18 years ago
parent 1c1fd9fe4a
commit 0a3dc7b4ce
1 changed files with 254 additions and 159 deletions
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181
opentracker.c
Unescape Escape View File

@ -31,30 +31,39 @@ struct http_data {
io_batch iob; io_batch iob;
char* hdrbuf; char* hdrbuf;
int hlen; int hlen;
char ip[16];
}; };
int header_complete(struct http_data* r) { int header_complete(struct http_data* r)
{
long i; long i;
long l = array_bytes(&r->r); long l = array_bytes(&r->r);
const char* c = array_start(&r->r); const char* c = array_start(&r->r);
for (i=0; i+1<l; ++i) {
for (i=0; i+1<l; ++i)
{
if (c[i]=='\n' && c[i+1]=='\n') if (c[i]=='\n' && c[i+1]=='\n')
return i+2; return i+2;
if (i+3<l &&
c[i]=='\r' && c[i+1]=='\n' && if (i+3<l && c[i]=='\r' && c[i+1]=='\n' && c[i+2]=='\r' && c[i+3]=='\n')
c[i+2]=='\r' && c[i+3]=='\n')
return i+4; return i+4;
} }
return 0; return 0;
} }
void httperror(struct http_data* r,const char* title,const char* message) { void httperror(struct http_data* r,const char* title,const char* message)
{
char* c; char* c;
c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200); c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200);
if (!c) {
if (!c)
{
r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n"; r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n";
r->hlen=strlen(r->hdrbuf); r->hlen=strlen(r->hdrbuf);
} else { }
else
{
c+=fmt_str(c,"HTTP/1.0 "); c+=fmt_str(c,"HTTP/1.0 ");
c+=fmt_str(c,title); c+=fmt_str(c,title);
c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: "); c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: ");
@ -67,45 +76,102 @@ void httperror(struct http_data* r,const char* title,const char* message) {
iob_addbuf(&r->iob,r->hdrbuf,r->hlen); iob_addbuf(&r->iob,r->hdrbuf,r->hlen);
} }
const char* http_header(struct http_data* r,const char* h) { // bestimmten http parameter auslesen und adresse zurueckgeben
const char* http_header(struct http_data* r,const char* h)
{
long i; long i;
long l = array_bytes(&r->r); long l = array_bytes(&r->r);
long sl = strlen(h); long sl = strlen(h);
const char* c = array_start(&r->r); const char* c = array_start(&r->r);
for (i=0; i+sl+2<l; ++i) for (i=0; i+sl+2<l; ++i)
if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':') { {
if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':')
{
c+=i+sl+1; c+=i+sl+1;
if (*c==' ' || *c=='\t') ++c; if (*c==' ' || *c=='\t') ++c;
return c; return c;
} }
return 0; return 0;
} }
}
void httpresponse(struct http_data* h,int64 s) { void httpresponse(struct http_data* h,int64 s)
{
char* c; char* c;
array_cat0(&h->r); array_cat0(&h->r);
c = array_start(&h->r); c = array_start(&h->r);
if (byte_diff(c,4,"GET ")) {
if (byte_diff(c,4,"GET "))
{
e400: e400:
httperror(h,"400 Invalid Request","This server only understands GET."); httperror(h,"400 Invalid Request","This server only understands GET.");
} else { }
else
{
char *d; char *d;
int64 fd; int64 fd;
struct stat s; struct stat s;
// expect 'GET /uri?nnbjhg HTTP/1.*'
c+=4; c+=4;
for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ; for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ;
if (*d!=' ') goto e400; if (*d!=' ') goto e400;
*d=0; *d=0;
if (c[0]!='/') goto e404; if (c[0]!='/') goto e404;
while (c[1]=='/') ++c; while (c[1]=='/') ++c;
if (!io_readfile(&fd,c+1)) {
e404: if (!byte_diff(c,9,"announce?"))
{
// info_hash, left, port, numwant, compact
struct ot_peer peer;
byte_copy( peer.ip, h->ip, 4);
peer.port = 6881;
c+=9;
while( *c!=' ' ) {
if(!byte_diff(c,10,"info_hash="))
{
// String is expected to be URL encoded, so expect
// (%[0-9A-F][0-9A-F]){20}
int s = scan_urlencoded(
}
else if(!byte_diff(c,8,"numwant="))
{
}
else if(!byte_diff(c,8,"compact="))
{
}
else if(!byte_diff(c,5,"port="))
{
}
else if(!byte_diff(c,5,"left="))
{
}
while( *++c!=' ' && *c!='&');
}
}
else if (!byte_diff(c,7,"scrape?"))
{
}
else
{
httperror(h,"404 Not Found","No such file or directory."); httperror(h,"404 Not Found","No such file or directory.");
} else {
if (fstat(fd,&s)==-1) {
io_close(fd);
goto e404; goto e404;
} }
c=h->hdrbuf=(char*)malloc(500); c=h->hdrbuf=(char*)malloc(500);
c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain"); c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain");
c+=fmt_str(c,"\r\nContent-Length: "); c+=fmt_str(c,"\r\nContent-Length: ");
@ -116,37 +182,52 @@ e404:
c+=fmt_httpdate(c,s.st_mtime); c+=fmt_httpdate(c,s.st_mtime);
c+=fmt_str(c,"\r\nConnection: close\r\n\r\n"); c+=fmt_str(c,"\r\nConnection: close\r\n\r\n");
iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf); iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
iob_addfile(&h->iob,fd,0,s.st_size); iob_addbuf(&h->iob,tracker_answer, tzracker_answer_size);
}
} }
e404:
io_dontwantread(s); io_dontwantread(s);
io_wantwrite(s); io_wantwrite(s);
} }
int main() { int main()
{
int s=socket_tcp6(); int s=socket_tcp6();
uint32 scope_id; uint32 scope_id;
char ip[16]; char ip[16];
uint16 port; uint16 port;
if (socket_bind6_reuse(s,V6any,8000,0)==-1) if (socket_bind6_reuse(s,V6any,8000,0)==-1)
panic("socket_bind6_reuse"); panic("socket_bind6_reuse");
if (socket_listen(s,16)==-1) if (socket_listen(s,16)==-1)
panic("socket_listen"); panic("socket_listen");
if (!io_fd(s)) if (!io_fd(s))
panic("io_fd"); panic("io_fd");
io_wantread(s); io_wantread(s);
for (;;) {
for (;;)
{
int64 i; int64 i;
io_wait(); io_wait();
while ((i=io_canread())!=-1) {
if (i==s) { while ((i=io_canread())!=-1)
{
if (i==s) // ist es der serversocket?
{
int n; int n;
while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1) { while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1)
if (io_fd(n)) { {
if (io_fd(n))
{
struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data)); struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data));
io_wantread(n); io_wantread(n);
if (h) {
if (h)
{
byte_zero(h,sizeof(struct http_data)); byte_zero(h,sizeof(struct http_data));
byte_copy(h->ip,ip,sizeof(ip));
io_setcookie(n,h); io_setcookie(n,h);
} else } else
io_close(n); io_close(n);
@ -158,44 +239,58 @@ int main() {
io_eagain(s); io_eagain(s);
else else
carp("socket_accept6"); carp("socket_accept6");
} else { }
else
{
char buf[8192]; char buf[8192];
struct http_data* h=io_getcookie(i); struct http_data* h=io_getcookie(i);
int l=io_tryread(i,buf,sizeof buf); int l=io_tryread(i,buf,sizeof buf);
if (l==-3) { if (l<=0)
if (h) { {
if (h)
{
array_reset(&h->r); array_reset(&h->r);
iob_reset(&h->iob); iob_reset(&h->iob);
free(h->hdrbuf); h->hdrbuf=0; free(h->hdrbuf); h->hdrbuf=0;
} }
io_close(i); io_close(i);
} else if (l==0) {
if (h) {
array_reset(&h->r);
iob_reset(&h->iob);
free(h->hdrbuf); h->hdrbuf=0;
} }
io_close(i); else
} else if (l>0) { {
array_catb(&h->r,buf,l); array_catb(&h->r,buf,l);
if (array_failed(&h->r)) {
if (array_failed(&h->r))
{
httperror(h,"500 Server Error","request too long."); httperror(h,"500 Server Error","request too long.");
emerge: emerge:
io_dontwantread(i); io_dontwantread(i);
io_wantwrite(i); io_wantwrite(i);
} else if (array_bytes(&h->r)>8192) { }
else if (array_bytes(&h->r)>8192)
{
httperror(h,"500 request too long","You sent too much headers"); httperror(h,"500 request too long","You sent too much headers");
goto emerge; goto emerge;
} else if ((l=header_complete(h))) }
else if ((l=header_complete(h)))
{
httpresponse(h,i); httpresponse(h,i);
} }
} }
} }
while ((i=io_canwrite())!=-1) { }
while ((i=io_canwrite())!=-1)
{
struct http_data* h=io_getcookie(i); struct http_data* h=io_getcookie(i);
int64 r=iob_send(i,&h->iob); int64 r=iob_send(i,&h->iob);
if (r==-1) io_eagain(i); else
if (r<=0) { if (r==-1)
io_eagain(i);
else
if (r<=0)
{
array_trunc(&h->r); array_trunc(&h->r);
iob_reset(&h->iob); iob_reset(&h->iob);
free(h->hdrbuf); h->hdrbuf=0; free(h->hdrbuf); h->hdrbuf=0;

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