mirror of git://erdgeist.org/opentracker
erdgeist
18 years ago
commit
ad472597c5
3 changed files with 572 additions and 0 deletions
@ -0,0 +1,11 @@
@@ -0,0 +1,11 @@
|
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CC?=gcc |
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CFLAGS+=-I../libowfat -Wall -O2 -pipe |
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LDFLAGS+=-L../libowfat/ -lowfat -s |
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SOURCES=opentracker.c trackerlogic.c |
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opentracker: $(SOURCES) |
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$(CC) $(SOURCES) -o opentracker $(CFLAGS) $(LDFLAGS) |
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clean: |
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rm -rf opentracker |
@ -0,0 +1,288 @@
@@ -0,0 +1,288 @@
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#include "socket.h" |
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#include "io.h" |
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#include "buffer.h" |
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#include "ip6.h" |
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#include "array.h" |
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#include "case.h" |
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#include "fmt.h" |
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#include "iob.h" |
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#include "str.h" |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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static void carp(const char* routine) { |
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buffer_puts(buffer_2,routine); |
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buffer_puts(buffer_2,": "); |
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buffer_puterror(buffer_2); |
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buffer_putnlflush(buffer_2); |
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} |
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static void panic(const char* routine) { |
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carp(routine); |
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exit(111); |
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} |
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struct http_data { |
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array r; |
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io_batch iob; |
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char* hdrbuf; |
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int hlen; |
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int keepalive; |
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}; |
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|
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int header_complete(struct http_data* r) { |
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long i; |
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long l=array_bytes(&r->r); |
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const char* c=array_start(&r->r); |
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for (i=0; i+1<l; ++i) { |
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if (c[i]=='\n' && c[i+1]=='\n') |
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return i+2; |
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if (i+3<l && |
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c[i]=='\r' && c[i+1]=='\n' && |
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c[i+2]=='\r' && c[i+3]=='\n') |
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return i+4; |
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} |
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return 0; |
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} |
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void httperror(struct http_data* r,const char* title,const char* message) { |
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char* c; |
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c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200); |
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if (!c) { |
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r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n"; |
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r->hlen=strlen(r->hdrbuf); |
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} else { |
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c+=fmt_str(c,"HTTP/1.0 "); |
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c+=fmt_str(c,title); |
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c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: "); |
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c+=fmt_str(c,r->keepalive?"keep-alive":"close"); |
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c+=fmt_str(c,"\r\nContent-Length: "); |
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c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4); |
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c+=fmt_str(c,"\r\n\r\n<title>"); |
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c+=fmt_str(c,title+4); |
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c+=fmt_str(c,"</title>\n"); |
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r->hlen=c - r->hdrbuf; |
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} |
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iob_addbuf(&r->iob,r->hdrbuf,r->hlen); |
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} |
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static struct mimeentry { const char* name, *type; } mimetab[] = { |
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{ "html", "text/html" }, |
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{ "css", "text/css" }, |
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{ "dvi", "application/x-dvi" }, |
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{ "ps", "application/postscript" }, |
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{ "pdf", "application/pdf" }, |
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{ "gif", "image/gif" }, |
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{ "png", "image/png" }, |
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{ "jpeg", "image/jpeg" }, |
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{ "jpg", "image/jpeg" }, |
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{ "mpeg", "video/mpeg" }, |
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{ "mpg", "video/mpeg" }, |
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{ "avi", "video/x-msvideo" }, |
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{ "mov", "video/quicktime" }, |
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{ "qt", "video/quicktime" }, |
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{ "mp3", "audio/mpeg" }, |
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{ "ogg", "audio/x-oggvorbis" }, |
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{ "wav", "audio/x-wav" }, |
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{ "pac", "application/x-ns-proxy-autoconfig" }, |
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{ "sig", "application/pgp-signature" }, |
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{ "torrent", "application/x-bittorrent" }, |
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{ "class", "application/octet-stream" }, |
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{ "js", "application/x-javascript" }, |
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{ "tar", "application/x-tar" }, |
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{ "zip", "application/zip" }, |
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{ "dtd", "text/xml" }, |
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{ "xml", "text/xml" }, |
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{ "xbm", "image/x-xbitmap" }, |
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{ "xpm", "image/x-xpixmap" }, |
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{ "xwd", "image/x-xwindowdump" }, |
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{ 0,0 } }; |
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const char* mimetype(const char* filename) { |
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int i,e=str_rchr(filename,'.'); |
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if (filename[e]==0) return "text/plain"; |
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++e; |
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for (i=0; mimetab[i].name; ++i) |
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if (str_equal(mimetab[i].name,filename+e)) |
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return mimetab[i].type; |
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return "application/octet-stream"; |
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} |
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const char* http_header(struct http_data* r,const char* h) { |
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long i; |
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long l=array_bytes(&r->r); |
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long sl=strlen(h); |
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const char* c=array_start(&r->r); |
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for (i=0; i+sl+2<l; ++i) |
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if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':') { |
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c+=i+sl+1; |
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if (*c==' ' || *c=='\t') ++c; |
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return c; |
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} |
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return 0; |
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} |
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void httpresponse(struct http_data* h,int64 s) { |
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char* c; |
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const char* m; |
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array_cat0(&h->r); |
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c=array_start(&h->r); |
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if (byte_diff(c,4,"GET ")) { |
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e400: |
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httperror(h,"400 Invalid Request","This server only understands GET."); |
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} else { |
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char *d; |
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int64 fd; |
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struct stat s; |
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c+=4; |
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for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ; |
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if (*d!=' ') goto e400; |
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*d=0; |
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if (c[0]!='/') goto e404; |
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while (c[1]=='/') ++c; |
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if (!io_readfile(&fd,c+1)) { |
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e404: |
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httperror(h,"404 Not Found","No such file or directory."); |
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} else { |
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if (fstat(fd,&s)==-1) { |
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io_close(fd); |
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goto e404; |
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} |
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if ((m=http_header(h,"Connection"))) { |
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if (str_equal(m,"keep-alive")) |
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h->keepalive=1; |
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else |
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h->keepalive=0; |
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} else { |
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if (byte_equal(d+1,8,"HTTP/1.0")) |
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h->keepalive=0; |
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else |
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h->keepalive=1; |
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} |
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m=mimetype(c); |
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c=h->hdrbuf=(char*)malloc(500); |
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c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: "); |
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c+=fmt_str(c,m); |
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c+=fmt_str(c,"\r\nContent-Length: "); |
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c+=fmt_ulonglong(c,s.st_size); |
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c+=fmt_str(c,"\r\nLast-Modified: "); |
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c+=fmt_httpdate(c,s.st_mtime); |
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c+=fmt_str(c,"\r\nConnection: "); |
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c+=fmt_str(c,h->keepalive?"keep-alive":"close"); |
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c+=fmt_str(c,"\r\n\r\n"); |
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iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf); |
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iob_addfile(&h->iob,fd,0,s.st_size); |
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} |
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} |
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io_dontwantread(s); |
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io_wantwrite(s); |
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} |
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int main() { |
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int s=socket_tcp6b(); |
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uint32 scope_id; |
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char ip[16]; |
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uint16 port; |
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if (socket_bind6_reuse(s,V6any,8000,0)==-1) |
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panic("socket_bind6_reuse"); |
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if (socket_listen(s,16)==-1) |
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panic("socket_listen"); |
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if (!io_fd(s)) |
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panic("io_fd"); |
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io_wantread(s); |
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for (;;) { |
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int64 i; |
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io_wait(); |
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while ((i=io_canread())!=-1) { |
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if (i==s) { |
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int n; |
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while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1) { |
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char buf[IP6_FMT]; |
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buffer_puts(buffer_2,"accepted new connection from "); |
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buffer_put(buffer_2,buf,fmt_ip6(buf,ip)); |
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buffer_puts(buffer_2,":"); |
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buffer_putulong(buffer_2,port); |
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buffer_puts(buffer_2," (fd "); |
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buffer_putulong(buffer_2,n); |
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buffer_puts(buffer_2,")"); |
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if (io_fd(n)) { |
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struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data)); |
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io_wantread(n); |
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if (h) { |
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byte_zero(h,sizeof(struct http_data)); |
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io_setcookie(n,h); |
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} else |
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io_close(n); |
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} else { |
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buffer_puts(buffer_2,", but io_fd failed."); |
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io_close(n); |
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} |
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buffer_putnlflush(buffer_2); |
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} |
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if (errno==EAGAIN) |
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io_eagain(s); |
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else |
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carp("socket_accept6"); |
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} else { |
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char buf[8192]; |
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struct http_data* h=io_getcookie(i); |
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int l=io_tryread(i,buf,sizeof buf); |
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if (l==-3) { |
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if (h) { |
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array_reset(&h->r); |
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iob_reset(&h->iob); |
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free(h->hdrbuf); h->hdrbuf=0; |
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} |
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buffer_puts(buffer_2,"io_tryread("); |
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buffer_putulong(buffer_2,i); |
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buffer_puts(buffer_2,"): "); |
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buffer_puterror(buffer_2); |
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buffer_putnlflush(buffer_2); |
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io_close(i); |
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} else if (l==0) { |
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if (h) { |
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array_reset(&h->r); |
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iob_reset(&h->iob); |
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free(h->hdrbuf); h->hdrbuf=0; |
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} |
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buffer_puts(buffer_2,"eof on fd #"); |
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buffer_putulong(buffer_2,i); |
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buffer_putnlflush(buffer_2); |
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io_close(i); |
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} else if (l>0) { |
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array_catb(&h->r,buf,l); |
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if (array_failed(&h->r)) { |
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httperror(h,"500 Server Error","request too long."); |
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emerge: |
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io_dontwantread(i); |
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io_wantwrite(i); |
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} else if (array_bytes(&h->r)>8192) { |
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httperror(h,"500 request too long","You sent too much headers"); |
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goto emerge; |
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} else if ((l=header_complete(h))) |
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httpresponse(h,i); |
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} |
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} |
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} |
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while ((i=io_canwrite())!=-1) { |
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struct http_data* h=io_getcookie(i); |
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int64 r=iob_send(i,&h->iob); |
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/* printf("iob_send returned %lld\n",r); */ |
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if (r==-1) io_eagain(i); else |
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if (r<=0) { |
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array_trunc(&h->r); |
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iob_reset(&h->iob); |
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free(h->hdrbuf); h->hdrbuf=0; |
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if (h->keepalive) { |
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io_dontwantwrite(i); |
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io_wantread(i); |
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} else |
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io_close(i); |
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} |
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} |
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} |
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return 0; |
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} |
@ -0,0 +1,273 @@
@@ -0,0 +1,273 @@
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// THIS REALLY BELONGS INTO A HEADER FILE
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//
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//
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#include <string.h> |
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#include <stdio.h> |
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#include <fcntl.h> |
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#include <sys/types.h> |
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#include <sys/mman.h> |
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typedef unsigned char ot_hash[20]; |
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typedef unsigned char ot_ip[ 4/*0*/ ]; |
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typedef unsigned long ot_time; |
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// tunables
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const unsigned long OT_TIMEOUT = 2700; |
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const unsigned long OT_HUGE_FILESIZE = 1024*1024*256; // Thats 256MB per file, enough for 204800 peers of 128 bytes
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#define OT_COMPACT_ONLY |
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#define MEMMOVE memmove |
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#define BZERO bzero |
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#define FORMAT_FIXED_STRING sprintf |
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#define FORMAT_FORMAT_STRING sprintf |
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#define BINARY_FIND binary_search |
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typedef struct { |
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#ifndef OT_COMPACT_ONLY |
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ot_hash id; |
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ot_hash key; |
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#endif |
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ot_ip ip; |
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unsigned short port; |
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ot_time death; |
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unsigned char flags; |
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} ot_peer; |
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unsigned char PEER_FLAG_SEEDING = 0x80; |
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unsigned char PEER_IP_LENGTH_MASK = 0x3f; |
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typedef struct { |
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ot_hash hash; |
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ot_peer *peer_list; |
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unsigned long peer_count; |
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unsigned long seed_count; |
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} ot_torrent; |
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void *map_file( char *file_name ); |
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// This behaves quite like bsearch but allows to find
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// the insertion point for inserts after unsuccessful searches
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// in this case exactmatch is 0 on exit
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//
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void *binary_search( const void *key, const void *base, |
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const unsigned long member_count, const unsigned long member_size, |
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int (*compar) (const void *, const void *), |
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int *exactmatch ); |
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int compare_hash( const void *hash1, const void *hash2 ) { return memcmp( hash1, hash2, sizeof( ot_hash )); } |
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int compare_ip_port( const void *peer1, const void *peer2 ) { return memcmp( peer1, peer2, 6); } |
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//
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//
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// END OF STUFF THAT BELONGS INTO A HEADER FILE
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ot_torrent *torrents_pointer = 0; |
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unsigned long torrents_count = 0; |
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unsigned char *scratchspace; |
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ot_torrent *add_peer_to_torrent( ot_hash hash, ot_peer *peer ) { |
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ot_torrent *torrent; |
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ot_peer *peer_dest; |
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int exactmatch; |
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torrent = BINARY_FIND( hash, torrents_pointer, torrents_count, sizeof( ot_torrent ), compare_hash, &exactmatch ); |
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if( !exactmatch ) { |
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// Assume, OS will provide us with space, after all, this is file backed
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MEMMOVE( torrent + 1, torrent, ( torrents_pointer + torrents_count ) - torrent ); |
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// Create a new torrent entry, then
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MEMMOVE( &torrent->hash, hash, sizeof( ot_hash ) ); |
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torrent->peer_list = map_file( hash ); |
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torrent->peer_count = 0; |
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torrent->seed_count = 0; |
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} |
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peer_dest = BINARY_FIND( peer, torrent->peer_list, torrent->peer_count, sizeof( ot_peer ), compare_ip_port, &exactmatch ); |
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if( exactmatch ) { |
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// If peer was a seeder but isn't anymore, decrease seeder count
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if( ( peer_dest->flags & PEER_FLAG_SEEDING ) && !( peer->flags & PEER_FLAG_SEEDING ) ) |
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torrent->seed_count--; |
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if( !( peer_dest->flags & PEER_FLAG_SEEDING ) && ( peer->flags & PEER_FLAG_SEEDING ) ) |
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torrent->seed_count++; |
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} else { |
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// Assume, OS will provide us with space, after all, this is file backed
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MEMMOVE( peer_dest + 1, peer_dest, ( torrent->peer_list + torrent->peer_count ) - peer_dest ); |
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|
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// Create a new peer entry, then
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MEMMOVE( peer_dest, peer, sizeof( ot_peer ) ); |
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torrent->peer_count++; |
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torrent->seed_count+= ( peer->flags & PEER_FLAG_SEEDING ) ? 1 : 0; |
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} |
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// Set new time out time
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peer_dest->death = now() + OT_TIMEOUT; |
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return torrent; |
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} |
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#define SETINVALID( i ) (scratchspace[index] = 3); |
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#define SETSELECTED( i ) (scratchspace[index] = 1); |
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#define TESTSELECTED( i ) (scratchspace[index] == 1 ) |
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#define TESTSET( i ) (scratchspace[index]) |
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#define RANDOM random() |
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inline int TESTVALIDPEER( ot_peer *p ) { return p->death > now(); } |
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// Compiles a list of random peers for a torrent
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// * scratch space keeps track of death or already selected peers
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// * reply must have enough space to hold 1+(1+16+2+1)*amount+1 bytes
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// * Selector function can be anything, maybe test for seeds, etc.
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// * that RANDOM may return huge values
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// * does not yet check not to return self
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// * it is not guaranteed to see all peers, so no assumptions on active seeders/peers may be done
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// * since compact format cannot handle v6 addresses, it must be enabled by OT_COMPACT_ONLY
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//
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void return_peers_for_torrent( ot_torrent *torrent, unsigned long amount, char *reply ) { |
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register ot_peer *peer_base = torrent->peer_list; |
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unsigned long peer_count = torrent->peer_count; |
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unsigned long selected_count = 0, invalid_count = 0; |
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unsigned long index = 0; |
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// optimize later ;)
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BZERO( scratchspace, peer_count ); |
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while( ( selected_count < amount ) && ( selected_count + invalid_count < peer_count ) ) { |
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// skip to first non-flagged peer
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while( TESTSET(index) ) index = ( index + 1 ) % peer_count; |
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|
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if( TESTVALIDPEER( peer_base + index ) ) { |
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SETINVALID(index); invalid_count++; |
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} else { |
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SETSELECTED(index); selected_count++; |
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index = ( index + RANDOM ) % peer_count; |
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} |
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} |
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// Now our scratchspace contains a list of selected_count valid peers
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// Collect them into a reply string
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index = 0; |
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#ifndef OT_COMPACT_ONLY |
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reply += FORMAT_FIXED_STRING( reply, "d5:peersl" ); |
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#else |
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reply += FORMAT_FORMAT_STRING( reply, "d5:peers%i:",6*selected_count ); |
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#endif |
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|
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while( selected_count-- ) { |
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ot_peer *peer; |
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while( !TESTSELECTED( index ) ) ++index; |
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peer = peer_base + index; |
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#ifdef OT_COMPACT_ONLY |
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MEMMOVE( reply, &peer->ip, 4 ); |
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MEMMOVE( reply+4, &peer->port, 2 ); |
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reply += 6; |
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#else |
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reply += FORMAT_FORMAT_STRING( reply, "d2:ip%d:%s7:peer id20:%20c4:porti%ie", |
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peer->flags & PEER_IP_LENGTH_MASK, |
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peer->ip, |
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peer->id, |
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peer->port ); |
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#endif |
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} |
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#ifndef OT_COMPACT_ONLY |
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reply += FORMAT_FIXED_STRING( reply, "ee" ); |
||||
#else |
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reply += FORMAT_FIXED_STRING( reply, "e" ); |
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#endif |
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} |
||||
|
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// Compacts a torrents peer list
|
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// * torrents older than OT_TIMEOUT are being kicked
|
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// * is rather expansive
|
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// * if this fails, torrent file is invalid, should add flag
|
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//
|
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void heal_torrent( ot_torrent *torrent ) { |
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unsigned long index = 0, base = 0, end, seed_count = 0; |
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|
||||
// Initialize base to first dead peer.
|
||||
while( ( base < torrent->peer_count ) && torrent->peer_list[base].death <= now() ) { |
||||
seed_count += ( torrent->peer_list[base].flags & PEER_FLAG_SEEDING ) ? 1 : 0; |
||||
base++; |
||||
} |
||||
|
||||
// No dead peers? Home.
|
||||
if( base == torrent->peer_count ) return; |
||||
|
||||
// From now index always looks to the next living peer while base keeps track of
|
||||
// the dead peer that marks the beginning of insert space.
|
||||
index = base + 1; |
||||
|
||||
while( 1 ) { |
||||
// Let index search for next living peer
|
||||
while( ( index < torrent->peer_count ) && torrent->peer_list[index].death > now() ) index++; |
||||
|
||||
// No further living peers found - base is our new peer count
|
||||
if( index == torrent->peer_count ) { |
||||
torrent->peer_count = base; |
||||
torrent->seed_count = seed_count; |
||||
return; |
||||
} |
||||
|
||||
end = index + 1; |
||||
|
||||
// Let end search for next dead peer (end of living peers)
|
||||
while( ( end < torrent->peer_count ) && torrent->peer_list[end].death <= now() ) { |
||||
seed_count += ( torrent->peer_list[end].flags & PEER_FLAG_SEEDING ) ? 1 : 0; |
||||
end++; |
||||
} |
||||
|
||||
// We either hit a dead peer or the end of our peers
|
||||
// In both cases: move block towards base
|
||||
MEMMOVE( torrent->peer_list + base, torrent->peer_list + index, ( end - index ) * sizeof( ot_peer ) ); |
||||
base += end - index; |
||||
|
||||
index = end; |
||||
} |
||||
} |
||||
|
||||
void *binary_search( const void *key, const void *base, |
||||
unsigned long member_count, const unsigned long member_size, |
||||
int (*compar) (const void *, const void *), |
||||
int *exactmatch ) { |
||||
unsigned char *lookat = ((unsigned char*)base) + member_size * (member_count >> 1); |
||||
*exactmatch = 1; |
||||
|
||||
while( member_count ) { |
||||
int cmp = compar((void*)lookat, key); |
||||
if (cmp == 0) return (void *)lookat; |
||||
if (cmp < 0) { |
||||
base = (void*)(lookat + member_size); |
||||
--member_count; |
||||
} |
||||
member_count >>= 1; |
||||
lookat = ((unsigned char*)base) + member_size * (member_count >> 1); |
||||
} |
||||
*exactmatch = 0; |
||||
return (void*)lookat; |
||||
|
||||
} |
||||
|
||||
// This function maps a "huge" file into process space
|
||||
// * I guess, we should be checking for more errors...
|
||||
void *map_file( char *file_name ) { |
||||
char *map; |
||||
int file_desc=open(file_name,O_RDWR|O_CREAT|O_NDELAY,0644); |
||||
|
||||
if( file_desc < 0) return 0; |
||||
|
||||
map=mmap(0,OT_HUGE_FILESIZE,PROT_READ|PROT_WRITE,MAP_SHARED,file_desc,0); |
||||
close(file_desc); |
||||
|
||||
return (map == (char*)-1) ? 0 : map; |
||||
} |
||||
|
||||
int init_logic( ) { |
||||
unlink( "./opentracker_map_index.idx" ); |
||||
torrents_pointer = map_file( "./opentracker_map_index.idx" ); |
||||
torrents_count = 0; |
||||
scratchspace = map_file( "./scratchspace" ); |
||||
} |
||||
|
||||
void deinit_logic( ) { |
||||
unmap_file( torrents_pointer ); |
||||
} |
Loading…
Reference in new issue