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-rw-r--r--opentracker.c477
1 files changed, 236 insertions, 241 deletions
diff --git a/opentracker.c b/opentracker.c
index d2df803..4a421cc 100644
--- a/opentracker.c
+++ b/opentracker.c
@@ -36,272 +36,267 @@ struct http_data {
36 36
37int header_complete(struct http_data* r) 37int header_complete(struct http_data* r)
38{ 38{
39 long i; 39 long i;
40 40
41 long l = array_bytes(&r->r); 41 long l = array_bytes(&r->r);
42 const char* c = array_start(&r->r); 42 const char* c = array_start(&r->r);
43 43
44 for (i=0; i+1<l; ++i) 44 for (i=0; i+1<l; ++i)
45 { 45 {
46 if (c[i]=='\n' && c[i+1]=='\n') 46 if (c[i]=='\n' && c[i+1]=='\n')
47 return i+2; 47 return i+2;
48 48
49 if (i+3<l && c[i]=='\r' && c[i+1]=='\n' && c[i+2]=='\r' && c[i+3]=='\n') 49 if (i+3<l && c[i]=='\r' && c[i+1]=='\n' && c[i+2]=='\r' && c[i+3]=='\n')
50 return i+4; 50 return i+4;
51 } 51 }
52 return 0; 52 return 0;
53} 53}
54 54
55void httperror(struct http_data* r,const char* title,const char* message) 55void httperror(struct http_data* r,const char* title,const char* message)
56{ 56{
57 char* c; 57 char* c;
58 c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200); 58 c=r->hdrbuf=(char*)malloc(strlen(message)+strlen(title)+200);
59 59
60 if (!c) 60 if (!c)
61 { 61 {
62 r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n"; 62 r->hdrbuf="HTTP/1.0 500 internal error\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nout of memory\n";
63 r->hlen=strlen(r->hdrbuf); 63 r->hlen=strlen(r->hdrbuf);
64 } 64 }
65 else 65 else
66 { 66 {
67 c+=fmt_str(c,"HTTP/1.0 "); 67 c+=fmt_str(c,"HTTP/1.0 ");
68 c+=fmt_str(c,title); 68 c+=fmt_str(c,title);
69 c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: "); 69 c+=fmt_str(c,"\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: ");
70 c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4); 70 c+=fmt_ulong(c,strlen(message)+strlen(title)+16-4);
71 c+=fmt_str(c,"\r\n\r\n<title>"); 71 c+=fmt_str(c,"\r\n\r\n<title>");
72 c+=fmt_str(c,title+4); 72 c+=fmt_str(c,title+4);
73 c+=fmt_str(c,"</title>\n"); 73 c+=fmt_str(c,"</title>\n");
74 r->hlen=c - r->hdrbuf; 74 r->hlen=c - r->hdrbuf;
75 } 75 }
76 iob_addbuf(&r->iob,r->hdrbuf,r->hlen); 76 iob_addbuf(&r->iob,r->hdrbuf,r->hlen);
77} 77}
78 78
79// bestimmten http parameter auslesen und adresse zurueckgeben 79// bestimmten http parameter auslesen und adresse zurueckgeben
80 80
81const char* http_header(struct http_data* r,const char* h) 81const char* http_header(struct http_data* r,const char* h)
82{ 82{
83 long i; 83 long i;
84 84
85 long l = array_bytes(&r->r); 85 long l = array_bytes(&r->r);
86 long sl = strlen(h); 86 long sl = strlen(h);
87 const char* c = array_start(&r->r); 87 const char* c = array_start(&r->r);
88 88
89 for (i=0; i+sl+2<l; ++i) 89 for (i=0; i+sl+2<l; ++i)
90 { 90 {
91 if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':') 91 if (c[i]=='\n' && case_equalb(c+i+1,sl,h) && c[i+sl+1]==':')
92 { 92 {
93 c+=i+sl+1; 93 c+=i+sl+1;
94 if (*c==' ' || *c=='\t') ++c; 94 if (*c==' ' || *c=='\t') ++c;
95 return c; 95 return c;
96 } 96 }
97 return 0; 97 return 0;
98 } 98 }
99} 99}
100 100
101void httpresponse(struct http_data* h,int64 s) 101void httpresponse(struct http_data* h,int64 s)
102{ 102{
103 char* c; 103 char* c;
104 array_cat0(&h->r); 104 array_cat0(&h->r);
105 105
106 c = array_start(&h->r); 106 c = array_start(&h->r);
107 107
108 if (byte_diff(c,4,"GET ")) 108 if (byte_diff(c,4,"GET "))
109 { 109 {
110e400: 110e400:
111 httperror(h,"400 Invalid Request","This server only understands GET."); 111 httperror(h,"400 Invalid Request","This server only understands GET.");
112 } 112 }
113 else 113 else
114 { 114 {
115 char *d; 115 char *d;
116 int64 fd; 116 int64 fd;
117 struct stat s; 117 struct stat s;
118 118
119 // expect 'GET /uri?nnbjhg HTTP/1.*' 119 // expect 'GET /uri?nnbjhg HTTP/1.*'
120 c+=4; 120 c+=4;
121 121
122 for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ; 122 for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ;
123 123
124 if (*d!=' ') goto e400; 124 if (*d!=' ') goto e400;
125 *d=0; 125 *d=0;
126 if (c[0]!='/') goto e404; 126 if (c[0]!='/') goto e404;
127 while (c[1]=='/') ++c; 127 while (c[1]=='/') ++c;
128 128
129 if (!byte_diff(c,9,"announce?")) 129 data = c;
130 { 130 switch( scan_urlencoded_query( &c, data, SCAN_PATH ) ) {
131 // info_hash, left, port, numwant, compact 131 case 6: /* scrape ? */
132 struct ot_peer peer; 132 if (!byte_diff(c,6,"scrape"))
133 goto 404;
134 break;
135 case 9:
136 if( !byte_diff(c,8,"announce"))
137 goto 404;
138 else {
139 // info_hash, left, port, numwant, compact
140 struct ot_peer peer;
133 ot_hash hash; 141 ot_hash hash;
134 byte_copy( peer.ip, h->ip, 4); 142 byte_copy( peer.ip, h->ip, 4);
135 peer.port = 6881; 143 peer.port = 6881;
136 144
137 c+=9; 145 while( NOCHAMSCANNEN ) {
138 while( *c!=' ' ) { 146 data = c;
139 if(!byte_diff(c,10,"info_hash=")) 147 switch( scan_urlencoded_query( &c, data, SCAN_SEARCHPATH_PARAM ) ) {
140 { 148 case -1: /* error */
141 size_t destlen = 20; 149 httperror(h,"404 Not Found","No such file or directory.");
142 // String is expected to be URL encoded, so expect 150 goto e404;
143 // (%[0-9A-F][0-9A-F]){20} 151 case 4:
144 152 if(!byte_diff(c,4,"port"))
145 int s = scan_urlencoded( c+10, hash, &destlen); 153 /* scan int */
146 if( c[s+10] != '&' ) 154 else if(!byte_diff(c,4,"left"))
147 goto e_parse; 155 /* scan int */
148 156 break;
149 } 157 case 7:
150 else if(!byte_diff(c,8,"numwant=")) 158 if(!byte_diff(c,7,"numwant"))
151 { 159 /* scan int */
152 160 else if(!byte_diff(c,7,"compact"))
153 } 161 /* scan flag */
154 else if(!byte_diff(c,8,"compact=")) 162 break;
155 { 163 case 9: /* info_hash */
156 164 if(!byte_diff(c,9,"info_hash"))
157 } 165 /* scan 20 bytes */
158 else if(!byte_diff(c,5,"port=")) 166 break;
159 { 167 }
160 168 }
161 } 169 break;
162 else if(!byte_diff(c,5,"left=")) 170 default: /* neither scrape nor announce */
163 { 171 httperror(h,"404 Not Found","No such file or directory.");
164 172 goto e404;
165 } 173 }
166 174
167 while( *++c!=' ' && *c!='&'); 175 c=h->hdrbuf=(char*)malloc(500);
168 } 176 c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain");
169 } 177 c+=fmt_str(c,"\r\nContent-Length: ");
170 else if (!byte_diff(c,7,"scrape?")) 178 /* ANSWER SIZE*/
171 { 179 c+=fmt_ulonglong(c,s.st_size);
172 180 c+=fmt_str(c,"\r\nLast-Modified: ");
173 } 181 /* MODIFY DATE */
174 else 182 c+=fmt_httpdate(c,s.st_mtime);
175 { 183 c+=fmt_str(c,"\r\nConnection: close\r\n\r\n");
176 httperror(h,"404 Not Found","No such file or directory."); 184 iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
177 goto e404; 185 iob_addbuf(&h->iob,tracker_answer, tzracker_answer_size);
178 } 186 }
179
180 c=h->hdrbuf=(char*)malloc(500);
181 c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain");
182 c+=fmt_str(c,"\r\nContent-Length: ");
183 /* ANSWER SIZE*/
184 c+=fmt_ulonglong(c,s.st_size);
185 c+=fmt_str(c,"\r\nLast-Modified: ");
186 /* MODIFY DATE */
187 c+=fmt_httpdate(c,s.st_mtime);
188 c+=fmt_str(c,"\r\nConnection: close\r\n\r\n");
189 iob_addbuf(&h->iob,h->hdrbuf,c - h->hdrbuf);
190 iob_addbuf(&h->iob,tracker_answer, tzracker_answer_size);
191 }
192e404: 187e404:
193 io_dontwantread(s); 188 io_dontwantread(s);
194 io_wantwrite(s); 189 io_wantwrite(s);
195} 190}
196 191
197int main() 192int main()
198{ 193{
199 int s=socket_tcp6(); 194 int s=socket_tcp6();
200 uint32 scope_id; 195 uint32 scope_id;
201 char ip[16]; 196 char ip[16];
202 uint16 port; 197 uint16 port;
203 198
204 if (socket_bind6_reuse(s,V6any,8000,0)==-1) 199 if (socket_bind6_reuse(s,V6any,8000,0)==-1)
205 panic("socket_bind6_reuse"); 200 panic("socket_bind6_reuse");
206 201
207 if (socket_listen(s,16)==-1) 202 if (socket_listen(s,16)==-1)
208 panic("socket_listen"); 203 panic("socket_listen");
209 204
210 if (!io_fd(s)) 205 if (!io_fd(s))
211 panic("io_fd"); 206 panic("io_fd");
212 207
213 io_wantread(s); 208 io_wantread(s);
214 209
215 for (;;) 210 for (;;)
216 { 211 {
217 int64 i; 212 int64 i;
218 io_wait(); 213 io_wait();
219 214
220 while ((i=io_canread())!=-1) 215 while ((i=io_canread())!=-1)
221 { 216 {
222 if (i==s) // ist es der serversocket? 217 if (i==s) // ist es der serversocket?
223 { 218 {
224 int n; 219 int n;
225 while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1) 220 while ((n=socket_accept6(s,ip,&port,&scope_id))!=-1)
226 { 221 {
227 if (io_fd(n)) 222 if (io_fd(n))
228 { 223 {
229 struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data)); 224 struct http_data* h=(struct http_data*)malloc(sizeof(struct http_data));
230 io_wantread(n); 225 io_wantread(n);
231 226
232 if (h) 227 if (h)
233 { 228 {
234 byte_zero(h,sizeof(struct http_data)); 229 byte_zero(h,sizeof(struct http_data));
235 byte_copy(h->ip,ip,sizeof(ip)); 230 byte_copy(h->ip,ip,sizeof(ip));
236 io_setcookie(n,h); 231 io_setcookie(n,h);
237 } else 232 } else
238 io_close(n); 233 io_close(n);
239 } else 234 } else
240 io_close(n); 235 io_close(n);
241 buffer_putnlflush(buffer_2); 236 buffer_putnlflush(buffer_2);
242 } 237 }
243 if (errno==EAGAIN) 238 if (errno==EAGAIN)
244 io_eagain(s); 239 io_eagain(s);
245 else 240 else
246 carp("socket_accept6"); 241 carp("socket_accept6");
247 } 242 }
248 else 243 else
249 { 244 {
250 char buf[8192]; 245 char buf[8192];
251 struct http_data* h=io_getcookie(i); 246 struct http_data* h=io_getcookie(i);
252 247
253 int l=io_tryread(i,buf,sizeof buf); 248 int l=io_tryread(i,buf,sizeof buf);
254 if (l<=0) 249 if (l<=0)
255 { 250 {
256 if (h) 251 if (h)
257 { 252 {
258 array_reset(&h->r); 253 array_reset(&h->r);
259 iob_reset(&h->iob); 254 iob_reset(&h->iob);
260 free(h->hdrbuf); h->hdrbuf=0; 255 free(h->hdrbuf); h->hdrbuf=0;
261 } 256 }
262 io_close(i); 257 io_close(i);
263 } 258 }
264 else 259 else
265 { 260 {
266 array_catb(&h->r,buf,l); 261 array_catb(&h->r,buf,l);
267 262
268 if (array_failed(&h->r)) 263 if (array_failed(&h->r))
269 { 264 {
270 httperror(h,"500 Server Error","request too long."); 265 httperror(h,"500 Server Error","request too long.");
271emerge: 266emerge:
272 io_dontwantread(i); 267 io_dontwantread(i);
273 io_wantwrite(i); 268 io_wantwrite(i);
274 } 269 }
275 else if (array_bytes(&h->r)>8192) 270 else if (array_bytes(&h->r)>8192)
276 { 271 {
277 httperror(h,"500 request too long","You sent too much headers"); 272 httperror(h,"500 request too long","You sent too much headers");
278 goto emerge; 273 goto emerge;
279 } 274 }
280 else if ((l=header_complete(h))) 275 else if ((l=header_complete(h)))
281 { 276 {
282 httpresponse(h,i); 277 httpresponse(h,i);
283 } 278 }
284 } 279 }
285 } 280 }
286 } 281 }
287 282
288 while ((i=io_canwrite())!=-1) 283 while ((i=io_canwrite())!=-1)
289 { 284 {
290 struct http_data* h=io_getcookie(i); 285 struct http_data* h=io_getcookie(i);
291 286
292 int64 r=iob_send(i,&h->iob); 287 int64 r=iob_send(i,&h->iob);
293 288
294 if (r==-1) 289 if (r==-1)
295 io_eagain(i); 290 io_eagain(i);
296 else 291 else
297 if (r<=0) 292 if (r<=0)
298 { 293 {
299 array_trunc(&h->r); 294 array_trunc(&h->r);
300 iob_reset(&h->iob); 295 iob_reset(&h->iob);
301 free(h->hdrbuf); h->hdrbuf=0; 296 free(h->hdrbuf); h->hdrbuf=0;
302 io_close(i); 297 io_close(i);
303 } 298 }
304 } 299 }
305 } 300 }
306 return 0; 301 return 0;
307} 302}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 15:30:04 +0000