1 | |
|
|
2 | /* |
|
|
3 | * static char *rcsid_sockets_c = |
|
|
4 | * "$Id: lowlevel.C,v 1.2 2006/08/18 02:06:58 root Exp $"; |
|
|
5 | */ |
|
|
6 | |
|
|
7 | /* |
1 | /* |
8 | CrossFire, A Multiplayer game for X-windows |
2 | CrossFire, A Multiplayer game for X-windows |
9 | |
3 | |
10 | Copyright (C) 1992 Frank Tore Johansen |
4 | Copyright (C) 1992 Frank Tore Johansen |
11 | |
5 | |
… | |
… | |
41 | using namespace std; |
35 | using namespace std; |
42 | |
36 | |
43 | #include <global.h> |
37 | #include <global.h> |
44 | #include <newclient.h> |
38 | #include <newclient.h> |
45 | #include <sproto.h> |
39 | #include <sproto.h> |
|
|
40 | #include <cstdarg> |
46 | |
41 | |
47 | #ifdef __linux__ |
42 | #ifdef __linux__ |
48 | # include <sys/types.h> |
43 | # include <sys/types.h> |
49 | # include <sys/socket.h> |
44 | # include <sys/socket.h> |
50 | # include <netinet/in.h> |
45 | # include <netinet/in.h> |
51 | # define TCP_HZ 1000 // sorry... |
46 | # define TCP_HZ 1000 // sorry... |
52 | # include <netinet/tcp.h> |
47 | # include <netinet/tcp.h> |
53 | #endif |
48 | #endif |
54 | |
49 | |
55 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
50 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
56 | // easily die in 20 seconds... |
51 | // easily die in 20 seconds... |
57 | #define SOCKET_TIMEOUT1 10 |
52 | #define SOCKET_TIMEOUT1 10 |
58 | #define SOCKET_TIMEOUT2 20 |
53 | #define SOCKET_TIMEOUT2 20 |
59 | |
54 | |
|
|
55 | void |
60 | void Socket_Flush (NewSocket *ns) |
56 | Socket_Flush (NewSocket * ns) |
61 | { |
57 | { |
62 | #ifdef __linux__ |
58 | #ifdef __linux__ |
63 | // check time of last ack, and, if too old, kill connection |
59 | // check time of last ack, and, if too old, kill connection |
64 | struct tcp_info tcpi; |
60 | struct tcp_info tcpi; |
65 | socklen_t len = sizeof (tcpi); |
61 | socklen_t len = sizeof (tcpi); |
66 | |
62 | |
67 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
63 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
68 | { |
64 | { |
69 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
65 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
70 | |
66 | |
71 | if (tcpi.tcpi_unacked |
|
|
72 | && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
67 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
73 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
68 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
74 | { |
69 | { |
75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
70 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
76 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
71 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
77 | ns->status = Ns_Dead; |
72 | ns->status = Ns_Dead; |
78 | } |
73 | } |
79 | } |
74 | } |
80 | |
75 | |
81 | int val; |
76 | int val; |
|
|
77 | |
82 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
78 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
83 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
79 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
84 | #endif |
80 | #endif |
85 | } |
81 | } |
86 | |
82 | |
87 | /*********************************************************************** |
83 | /*********************************************************************** |
88 | * |
84 | * |
89 | * SockList functions/utilities |
85 | * packet functions/utilities |
90 | * |
86 | * |
91 | **********************************************************************/ |
87 | **********************************************************************/ |
92 | |
88 | |
93 | void SockList_Init(SockList *sl) |
89 | packet &packet::operator <<(const data &v) |
94 | { |
90 | { |
95 | sl->len=0; |
91 | if (v.len) |
96 | sl->buf=NULL; |
92 | { |
97 | } |
93 | memcpy (buf + len, v.ptr, v.len); |
|
|
94 | len += v.len; |
|
|
95 | } |
98 | |
96 | |
99 | void SockList_AddInt(SockList *sl, uint32 data) |
97 | return *this; |
100 | { |
|
|
101 | sl->buf[sl->len++]= (data>>24)&0xff; |
|
|
102 | sl->buf[sl->len++]= (data>>16)&0xff; |
|
|
103 | sl->buf[sl->len++]= (data>>8)&0xff; |
|
|
104 | sl->buf[sl->len++] = data & 0xff; |
|
|
105 | } |
98 | } |
106 | |
99 | |
107 | void SockList_AddInt64(SockList *sl, uint64 data) |
100 | packet &packet::operator <<(const data8 &v) |
108 | { |
101 | { |
109 | sl->buf[sl->len++]= ( char )( (data>>56)&0xff ); |
102 | unsigned int len = min (v.len, 0x00FF); |
110 | sl->buf[sl->len++]= ( char )( (data>>48)&0xff ); |
103 | return *this << uint8 (len) << data (v.ptr, len); |
111 | sl->buf[sl->len++]= ( char )( (data>>40)&0xff ); |
|
|
112 | sl->buf[sl->len++]= ( char )( (data>>32)&0xff ); |
|
|
113 | |
|
|
114 | sl->buf[sl->len++]= ( char )( (data>>24)&0xff ); |
|
|
115 | sl->buf[sl->len++]= ( char )( (data>>16)&0xff ); |
|
|
116 | sl->buf[sl->len++]= ( char )( (data>>8)&0xff ); |
|
|
117 | sl->buf[sl->len++] =( char )( data & 0xff ); |
|
|
118 | } |
104 | } |
119 | |
105 | |
120 | /* Basically does the reverse of SockList_AddInt, but on |
106 | packet &packet::operator <<(const data16 &v) |
121 | * strings instead. Same for the GetShort, but for 16 bits. |
|
|
122 | */ |
|
|
123 | int GetInt_String(unsigned char *data) |
|
|
124 | { |
107 | { |
125 | return ((data[0]<<24) + (data[1]<<16) + (data[2]<<8) + data[3]); |
108 | unsigned int len = min (v.len, 0xFFFF); |
|
|
109 | return *this << uint16 (len) << data (v.ptr, len); |
126 | } |
110 | } |
127 | |
111 | |
128 | short GetShort_String(unsigned char *data) { |
112 | packet &packet::operator <<(const char *v) |
129 | return ((data[0]<<8)+data[1]); |
113 | { |
|
|
114 | return *this << data (v, strlen (v ? v : 0)); |
|
|
115 | } |
|
|
116 | |
|
|
117 | void |
|
|
118 | packet::printf (const char *format, ...) |
|
|
119 | { |
|
|
120 | va_list ap; |
|
|
121 | va_start (ap, format); |
|
|
122 | |
|
|
123 | len += vsnprintf ((char *)buf + len, MAXSOCKBUF, format, ap); |
|
|
124 | |
|
|
125 | va_end (ap); |
130 | } |
126 | } |
131 | |
127 | |
132 | /****************************************************************************** |
128 | /****************************************************************************** |
133 | * |
129 | * |
134 | * Start of read routines. |
130 | * Start of read routines. |
135 | * |
131 | * |
136 | ******************************************************************************/ |
132 | ******************************************************************************/ |
137 | |
133 | |
138 | /** |
134 | int |
139 | * This reads from fd and puts the data in sl. We return true if we think |
135 | NewSocket::read_packet () |
140 | * we have a full packet, 0 if we have a partial packet. The only processing |
|
|
141 | * we do is remove the intial size value. len (As passed) is the size of the |
|
|
142 | * buffer allocated in the socklist. We make the assumption the buffer is |
|
|
143 | * at least 2 bytes long. |
|
|
144 | */ |
|
|
145 | |
|
|
146 | int SockList_ReadPacket(int fd, SockList *sl, int len) |
|
|
147 | { |
136 | { |
148 | int stat,toread; |
137 | for (;;) |
149 | |
|
|
150 | /* Sanity check - shouldn't happen */ |
|
|
151 | if (sl->len < 0) { |
|
|
152 | abort(); |
|
|
153 | } |
138 | { |
154 | /* We already have a partial packet */ |
139 | if (inbuf_len >= 2) |
155 | if (sl->len<2) { |
140 | { |
156 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: change read() to recv() */ |
141 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
157 | |
142 | |
158 | stat=recv(fd, sl->buf + sl->len, 2-sl->len,0); |
143 | if (inbuf_len >= 2 + pkt_len) |
|
|
144 | return pkt_len + 2; |
|
|
145 | } |
159 | |
146 | |
160 | #else |
147 | int amount = sizeof (inbuf) - inbuf_len; |
161 | do { |
148 | |
162 | stat=read(fd, sl->buf + sl->len, 2-sl->len); |
149 | if (amount <= 0) |
163 | } while ((stat==-1) && (errno==EINTR)); |
150 | { |
164 | #endif |
151 | LOG (llevError, "packet too large");//TODO |
165 | if (stat<0) { |
152 | return -1; |
166 | /* In non blocking mode, EAGAIN is set when there is no |
153 | } |
167 | * data available. |
154 | |
168 | */ |
155 | amount = read (fd, inbuf + inbuf_len, amount); |
169 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: error handling for win32 */ |
156 | |
170 | if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) { |
157 | if (!amount) |
171 | if(WSAGetLastError() == WSAECONNRESET) |
158 | { |
172 | LOG(llevDebug,"Connection closed by client\n"); |
159 | status = Ns_Dead; |
173 | else |
160 | return -1; |
174 | { |
161 | } |
175 | LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError()); |
162 | else if (amount < 0) |
176 | } |
163 | { |
177 | return -1; /* kick this user! */ |
164 | if (errno != EAGAIN && errno != EINTR) |
|
|
165 | { |
|
|
166 | LOG (llevError, "read error: %s", strerror (errno)); |
|
|
167 | return -1; |
|
|
168 | } |
|
|
169 | |
|
|
170 | return 0; |
|
|
171 | } |
|
|
172 | |
|
|
173 | inbuf_len += amount; |
|
|
174 | |
|
|
175 | cst_tot.ibytes += amount; |
|
|
176 | cst_lst.ibytes += amount; |
178 | } |
177 | } |
179 | #else |
178 | } |
180 | if (errno != EAGAIN && errno !=EWOULDBLOCK) { |
|
|
181 | LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno)); |
|
|
182 | } |
|
|
183 | #endif |
|
|
184 | return 0; /*Error */ |
|
|
185 | } |
|
|
186 | if (stat==0) return -1; |
|
|
187 | sl->len += stat; |
|
|
188 | #ifdef CS_LOGSTATS |
|
|
189 | cst_tot.ibytes += stat; |
|
|
190 | cst_lst.ibytes += stat; |
|
|
191 | #endif |
|
|
192 | if (stat<2) return 0; /* Still don't have a full packet */ |
|
|
193 | } |
|
|
194 | /* Figure out how much more data we need to read. Add 2 from the |
|
|
195 | * end of this - size header information is not included. |
|
|
196 | */ |
|
|
197 | toread = 2+(sl->buf[0] << 8) + sl->buf[1] - sl->len; |
|
|
198 | if ((toread + sl->len) >= len) { |
|
|
199 | LOG(llevError,"SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", |
|
|
200 | toread + sl->len, len); |
|
|
201 | /* Quick hack in case for 'oldsocketmode' input. If we are |
|
|
202 | * closing the socket anyways, then reading this extra 100 bytes |
|
|
203 | * shouldn't hurt. |
|
|
204 | */ |
|
|
205 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
|
|
206 | recv(fd, sl->buf+2, 100, 0); |
|
|
207 | #else |
|
|
208 | read(fd, sl->buf+2, 100); |
|
|
209 | #endif /* end win32 */ |
|
|
210 | |
179 | |
211 | /* return error so the socket is closed */ |
180 | void |
212 | return -1; |
181 | NewSocket::skip_packet (int len) |
213 | } |
182 | { |
214 | do { |
183 | inbuf_len -= len; |
215 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
184 | memmove (inbuf, inbuf + len, inbuf_len); |
216 | stat = recv(fd, sl->buf+ sl->len, toread, 0); |
|
|
217 | #else |
|
|
218 | do { |
|
|
219 | stat = read(fd, sl->buf+ sl->len, toread); |
|
|
220 | } while ((stat<0) && (errno==EINTR)); |
|
|
221 | #endif |
|
|
222 | if (stat<0) { |
|
|
223 | |
|
|
224 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change error handling for win32 */ |
|
|
225 | if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) { |
|
|
226 | if(WSAGetLastError() == WSAECONNRESET) |
|
|
227 | LOG(llevDebug,"Connection closed by client\n"); |
|
|
228 | else |
|
|
229 | { |
|
|
230 | LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError()); |
|
|
231 | } |
|
|
232 | return -1; /* kick this user! */ |
|
|
233 | } |
|
|
234 | #else |
|
|
235 | if (errno != EAGAIN && errno !=EWOULDBLOCK) { |
|
|
236 | LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno)); |
|
|
237 | } |
|
|
238 | #endif |
|
|
239 | return 0; /*Error */ |
|
|
240 | } |
|
|
241 | if (stat==0) return -1; |
|
|
242 | sl->len += stat; |
|
|
243 | #ifdef CS_LOGSTATS |
|
|
244 | cst_tot.ibytes += stat; |
|
|
245 | cst_lst.ibytes += stat; |
|
|
246 | #endif |
|
|
247 | toread -= stat; |
|
|
248 | if (toread==0) return 1; |
|
|
249 | if (toread < 0) { |
|
|
250 | LOG(llevError,"SockList_ReadPacket: Read more bytes than desired.\n"); |
|
|
251 | return 1; |
|
|
252 | } |
|
|
253 | } while (toread>0); |
|
|
254 | return 0; |
|
|
255 | } |
185 | } |
256 | |
186 | |
257 | /******************************************************************************* |
187 | /******************************************************************************* |
258 | * |
188 | * |
259 | * Start of write related routines. |
189 | * Start of write related routines. |
… | |
… | |
265 | * |
195 | * |
266 | * ns is the socket we are adding the data to, buf is the start of the |
196 | * ns is the socket we are adding the data to, buf is the start of the |
267 | * data, and len is the number of bytes to add. |
197 | * data, and len is the number of bytes to add. |
268 | */ |
198 | */ |
269 | |
199 | |
|
|
200 | static void |
270 | static void add_to_buffer(NewSocket *ns, char *buf, int len) |
201 | add_to_buffer (NewSocket *ns, char *buf, int len) |
271 | { |
202 | { |
272 | int avail, end; |
203 | int avail, end; |
273 | |
204 | |
274 | if ((len+ns->outputbuffer.len)>SOCKETBUFSIZE) { |
205 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
|
|
206 | { |
275 | LOG(llevDebug,"Socket on fd %d has overrun internal buffer - marking as dead\n", |
207 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); |
276 | ns->fd); |
|
|
277 | ns->status = Ns_Dead; |
208 | ns->status = Ns_Dead; |
278 | return; |
209 | return; |
279 | } |
210 | } |
280 | |
211 | |
281 | /* data + end is where we start putting the new data. The last byte |
212 | /* data + end is where we start putting the new data. The last byte |
282 | * currently in use is actually data + end -1 |
213 | * currently in use is actually data + end -1 |
283 | */ |
214 | */ |
284 | |
215 | |
285 | end=ns->outputbuffer.start + ns->outputbuffer.len; |
216 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
286 | /* The buffer is already in a wrapped state, so adjust end */ |
217 | /* The buffer is already in a wrapped state, so adjust end */ |
287 | if (end>=SOCKETBUFSIZE) end-=SOCKETBUFSIZE; |
218 | if (end >= SOCKETBUFSIZE) |
|
|
219 | end -= SOCKETBUFSIZE; |
|
|
220 | |
288 | avail=SOCKETBUFSIZE - end; |
221 | avail = SOCKETBUFSIZE - end; |
289 | |
222 | |
290 | /* We can all fit it behind the current data without wrapping */ |
223 | /* We can all fit it behind the current data without wrapping */ |
291 | if (avail >=len ) { |
224 | if (avail >= len) |
292 | memcpy(ns->outputbuffer.data + end, buf, len); |
225 | memcpy (ns->outputbuffer.data + end, buf, len); |
|
|
226 | else |
293 | } |
227 | { |
294 | else { |
|
|
295 | memcpy(ns->outputbuffer.data + end, buf, avail); |
228 | memcpy (ns->outputbuffer.data + end, buf, avail); |
296 | memcpy(ns->outputbuffer.data, buf+avail, len-avail); |
229 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
297 | } |
230 | } |
|
|
231 | |
298 | ns->outputbuffer.len += len; |
232 | ns->outputbuffer.len += len; |
299 | #if 0 |
233 | #if 0 |
300 | LOG(llevDebug,"Added %d to output buffer, total length now %d, start=%d\n", len, |
234 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
301 | ns->outputbuffer.len, ns->outputbuffer.start); |
|
|
302 | #endif |
235 | #endif |
303 | } |
236 | } |
304 | |
237 | |
305 | /** |
238 | /** |
306 | * Writes data to socket. |
239 | * Writes data to socket. |
307 | * |
240 | * |
308 | * When the socket is clear to write, and we have backlogged data, this |
241 | * When the socket is clear to write, and we have backlogged data, this |
309 | * is called to write it out. |
242 | * is called to write it out. |
310 | */ |
243 | */ |
|
|
244 | void |
311 | void write_socket_buffer(NewSocket *ns) |
245 | write_socket_buffer (NewSocket * ns) |
312 | { |
246 | { |
313 | int amt, max; |
247 | int amt, max; |
314 | |
248 | |
315 | if (ns->outputbuffer.len==0) { |
249 | if (ns->outputbuffer.len == 0) |
|
|
250 | { |
316 | LOG(llevDebug,"write_socket_buffer called when there is no data, fd=%d\n", |
251 | LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); |
317 | ns->fd); |
252 | return; |
318 | return; |
253 | } |
|
|
254 | |
|
|
255 | do |
319 | } |
256 | { |
320 | |
|
|
321 | do { |
|
|
322 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
257 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
323 | if (ns->outputbuffer.len<max) max = ns->outputbuffer.len; |
258 | if (ns->outputbuffer.len < max) |
|
|
259 | max = ns->outputbuffer.len; |
324 | |
260 | |
325 | #ifdef WIN32 /* ***win32 write_socket_buffer: change write() to send() */ |
261 | do |
326 | amt=send(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max,0); |
262 | { |
327 | #else |
|
|
328 | do { |
|
|
329 | amt=write(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
263 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
|
|
264 | } |
330 | } while ((amt<0) && (errno==EINTR)); |
265 | while ((amt < 0) && (errno == EINTR)); |
331 | #endif |
|
|
332 | |
266 | |
333 | if (amt < 0) { /* We got an error */ |
267 | if (amt < 0) |
|
|
268 | { /* We got an error */ |
334 | |
269 | |
335 | #ifdef WIN32 /* ***win32 write_socket_buffer: change error handling */ |
|
|
336 | if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) { |
|
|
337 | LOG(llevError,"New socket write failed (wsb) (%d).\n", WSAGetLastError()); |
|
|
338 | #else |
|
|
339 | if (errno !=EWOULDBLOCK) { |
270 | if (errno != EWOULDBLOCK) |
340 | LOG(llevError,"New socket write failed (wsb) (%d: %s).\n", |
271 | { |
341 | errno, strerror_local(errno)); |
272 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
342 | #endif |
273 | ns->status = Ns_Dead; |
343 | ns->status=Ns_Dead; |
274 | return; |
344 | return; |
275 | } |
345 | } |
276 | else |
346 | else { /* EWOULDBLOCK */ |
277 | { /* EWOULDBLOCK */ |
347 | /* can't write it, so store it away. */ |
278 | /* can't write it, so store it away. */ |
348 | ns->can_write=0; |
279 | ns->can_write = 0; |
349 | return; |
280 | return; |
350 | } |
281 | } |
351 | } |
282 | } |
352 | ns->outputbuffer.start += amt; |
283 | ns->outputbuffer.start += amt; |
353 | /* wrap back to start of buffer */ |
284 | /* wrap back to start of buffer */ |
354 | if (ns->outputbuffer.start==SOCKETBUFSIZE) ns->outputbuffer.start=0; |
285 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
286 | ns->outputbuffer.start = 0; |
355 | ns->outputbuffer.len -= amt; |
287 | ns->outputbuffer.len -= amt; |
356 | #ifdef CS_LOGSTATS |
288 | #ifdef CS_LOGSTATS |
357 | cst_tot.obytes += amt; |
289 | cst_tot.obytes += amt; |
358 | cst_lst.obytes += amt; |
290 | cst_lst.obytes += amt; |
359 | #endif |
291 | #endif |
|
|
292 | } |
360 | } while (ns->outputbuffer.len>0); |
293 | while (ns->outputbuffer.len > 0); |
361 | } |
294 | } |
362 | |
295 | |
363 | /** |
296 | /** |
364 | * This writes data to the socket. - It is very low level - |
297 | * This writes data to the socket. - It is very low level - |
365 | * all we try and do is write out the data to the socket |
298 | * all we try and do is write out the data to the socket |
366 | * provided (ns). buf is the data to write, len is the number |
299 | * provided (ns). buf is the data to write, len is the number |
367 | * of bytes to write. IT doesn't return anything - rather, it |
300 | * of bytes to write. IT doesn't return anything - rather, it |
368 | * updates the ns structure if we get an error. |
301 | * updates the ns structure if we get an error. |
369 | */ |
302 | */ |
|
|
303 | void |
370 | void Write_To_Socket(NewSocket *ns, char *buf, int len) |
304 | Write_To_Socket (NewSocket * ns, char *buf, int len) |
371 | { |
305 | { |
372 | int amt=0; |
306 | int amt = 0; |
373 | char *pos=buf; |
307 | char *pos = buf; |
374 | |
308 | |
375 | if (ns->status == Ns_Dead || !buf) { |
309 | if (ns->status == Ns_Dead || !buf) |
|
|
310 | { |
376 | LOG(llevDebug,"Write_To_Socket called with dead socket\n"); |
311 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
377 | return; |
312 | return; |
378 | } |
313 | } |
379 | |
314 | |
380 | #ifndef __GNU__ /* This caused problems on Hurd */ |
315 | #ifndef __GNU__ /* This caused problems on Hurd */ |
381 | if (!ns->can_write) { |
316 | if (!ns->can_write) |
|
|
317 | { |
382 | add_to_buffer(ns, buf, len); |
318 | add_to_buffer (ns, buf, len); |
383 | return; |
319 | return; |
384 | } |
320 | } |
385 | #endif |
321 | #endif |
386 | /* If we manage to write more than we wanted, take it as a bonus */ |
322 | /* If we manage to write more than we wanted, take it as a bonus */ |
387 | while (len>0) { |
323 | while (len > 0) |
|
|
324 | { |
388 | |
325 | |
389 | #ifdef WIN32 /* ***win32 Write_To_Socket: change write() to send() */ |
326 | do |
390 | amt=send(ns->fd, pos, len,0); |
327 | { |
391 | #else |
|
|
392 | do { |
|
|
393 | amt=write(ns->fd, pos, len); |
328 | amt = write (ns->fd, pos, len); |
|
|
329 | } |
394 | } while ((amt<0) && (errno==EINTR)); |
330 | while ((amt < 0) && (errno == EINTR)); |
395 | #endif |
|
|
396 | |
331 | |
397 | if (amt < 0) { /* We got an error */ |
332 | if (amt < 0) |
398 | #ifdef WIN32 /* ***win32 Write_To_Socket: change error handling */ |
333 | { /* We got an error */ |
399 | if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) { |
|
|
400 | LOG(llevError,"New socket write failed WTS (%d).\n",WSAGetLastError()); |
|
|
401 | #else |
|
|
402 | if (errno !=EWOULDBLOCK) { |
334 | if (errno != EWOULDBLOCK) |
|
|
335 | { |
403 | LOG(llevError,"New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
336 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
404 | errno, strerror_local(errno)); |
337 | errno, strerror (errno)); |
405 | #endif |
338 | ns->status = Ns_Dead; |
406 | ns->status=Ns_Dead; |
339 | return; |
407 | return; |
340 | } |
408 | } |
341 | else |
409 | else { /* EWOULDBLOCK */ |
342 | { /* EWOULDBLOCK */ |
410 | /* can't write it, so store it away. */ |
343 | /* can't write it, so store it away. */ |
411 | add_to_buffer(ns, pos, len); |
344 | add_to_buffer (ns, pos, len); |
412 | ns->can_write=0; |
345 | ns->can_write = 0; |
413 | return; |
346 | return; |
414 | } |
347 | } |
415 | } |
348 | } |
416 | /* amt gets set to 0 above in blocking code, so we do this as |
349 | /* amt gets set to 0 above in blocking code, so we do this as |
417 | * an else if to make sure we don't reprocess it. |
350 | * an else if to make sure we don't reprocess it. |
418 | */ |
351 | */ |
419 | else if (amt==0) { |
352 | else if (amt == 0) |
|
|
353 | { |
420 | LOG(llevError,"Write_To_Socket: No data written out.\n"); |
354 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
421 | } |
355 | } |
422 | len -= amt; |
356 | len -= amt; |
423 | pos += amt; |
357 | pos += amt; |
424 | #ifdef CS_LOGSTATS |
358 | #ifdef CS_LOGSTATS |
425 | cst_tot.obytes += amt; |
359 | cst_tot.obytes += amt; |
426 | cst_lst.obytes += amt; |
360 | cst_lst.obytes += amt; |
427 | #endif |
361 | #endif |
428 | } |
362 | } |
429 | } |
363 | } |
430 | |
|
|
431 | |
364 | |
432 | /** |
365 | /** |
433 | * Takes a string of data, and writes it out to the socket. A very handy |
366 | * Takes a string of data, and writes it out to the socket. A very handy |
434 | * shortcut function. |
367 | * shortcut function. |
435 | */ |
368 | */ |
436 | void cs_write_string(NewSocket *ns, const char *buf, int len) |
|
|
437 | { |
|
|
438 | SockList sl; |
|
|
439 | |
369 | |
440 | sl.len = len; |
370 | void |
441 | sl.buf = (unsigned char*)buf; |
371 | NewSocket::send_packet (packet &sl) |
|
|
372 | { |
442 | Send_With_Handling(ns, &sl); |
373 | Send_With_Handling (this, &sl); |
443 | } |
374 | } |
444 | |
375 | |
|
|
376 | void |
|
|
377 | NewSocket::send_packet (const char *buf, int len) |
|
|
378 | { |
|
|
379 | packet sl; |
|
|
380 | |
|
|
381 | sl << data (buf, len); |
|
|
382 | send_packet (sl); |
|
|
383 | } |
|
|
384 | |
|
|
385 | void |
|
|
386 | NewSocket::send_packet (const char *buf) |
|
|
387 | { |
|
|
388 | send_packet (buf, strlen (buf)); |
|
|
389 | } |
445 | |
390 | |
446 | /** |
391 | /** |
447 | * Calls Write_To_Socket to send data to the client. |
392 | * Calls Write_To_Socket to send data to the client. |
448 | * |
393 | * |
449 | * The only difference in this function is that we take a SockList |
394 | * The only difference in this function is that we take a packet |
450 | *, and we prepend the length information. |
395 | *, and we prepend the length information. |
451 | */ |
396 | */ |
|
|
397 | void |
452 | void Send_With_Handling(NewSocket *ns,SockList *msg) |
398 | Send_With_Handling (NewSocket *ns, packet *msg) |
453 | { |
399 | { |
454 | unsigned char sbuf[4]; |
400 | unsigned char sbuf[4]; |
455 | |
401 | |
456 | if (ns->status == Ns_Dead || !msg) |
402 | if (ns->status == Ns_Dead || !msg) |
457 | return; |
403 | return; |
458 | |
404 | |
459 | if (msg->len >= MAXSOCKBUF) { |
405 | if (msg->len >= MAXSOCKBUF) |
|
|
406 | { |
460 | LOG(llevError,"Trying to send a buffer beyond properly size, len =%d\n", |
407 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); |
461 | msg->len); |
|
|
462 | /* Almost certainly we've overflowed a buffer, so quite now to make |
408 | /* Almost certainly we've overflowed a buffer, so quite now to make |
463 | * it easier to debug. |
409 | * it easier to debug. |
464 | */ |
410 | */ |
465 | abort(); |
411 | abort (); |
466 | } |
412 | } |
467 | sbuf[0] = ((uint32)(msg->len) >> 8) & 0xFF; |
413 | sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF; |
468 | sbuf[1] = ((uint32)(msg->len)) & 0xFF; |
414 | sbuf[1] = ((uint32) (msg->len)) & 0xFF; |
469 | if (ns->status != Ns_Old) |
415 | if (ns->status != Ns_Old) |
470 | Write_To_Socket(ns, (char *) sbuf, 2); |
416 | Write_To_Socket (ns, (char *) sbuf, 2); |
471 | Write_To_Socket(ns, (char*)msg->buf, msg->len); |
417 | Write_To_Socket (ns, (char *) msg->buf, msg->len); |
472 | } |
418 | } |
473 | |
|
|
474 | /** |
|
|
475 | * Takes a string of data, and writes it out to the socket. A very handy |
|
|
476 | * shortcut function. |
|
|
477 | */ |
|
|
478 | void Write_String_To_Socket(NewSocket *ns, char *buf, int len) |
|
|
479 | { |
|
|
480 | SockList sl; |
|
|
481 | |
|
|
482 | sl.len = len; |
|
|
483 | sl.buf = (unsigned char*) buf; |
|
|
484 | Send_With_Handling(ns, &sl); |
|
|
485 | } |
|
|
486 | |
|
|
487 | |
419 | |
488 | /****************************************************************************** |
420 | /****************************************************************************** |
489 | * |
421 | * |
490 | * statistics logging functions. |
422 | * statistics logging functions. |
491 | * |
423 | * |
492 | ******************************************************************************/ |
424 | ******************************************************************************/ |
493 | |
425 | |
494 | #ifdef CS_LOGSTATS |
426 | #ifdef CS_LOGSTATS |
|
|
427 | |
495 | /* cst_tot is for the life of the server, cst_last is for the last series of |
428 | /* cst_tot is for the life of the server, cst_last is for the last series of |
496 | * stats |
429 | * stats |
497 | */ |
430 | */ |
498 | CS_Stats cst_tot, cst_lst; |
431 | CS_Stats cst_tot, cst_lst; |
499 | |
432 | |
500 | /** |
433 | /** |
501 | * Writes out the gathered stats. We clear cst_lst. |
434 | * Writes out the gathered stats. We clear cst_lst. |
502 | */ |
435 | */ |
|
|
436 | void |
503 | void write_cs_stats(void) |
437 | write_cs_stats (void) |
504 | { |
438 | { |
505 | time_t now=time(NULL); |
439 | time_t now = time (NULL); |
506 | |
440 | |
507 | /* If no connections recently, don't both to log anything */ |
441 | /* If no connections recently, don't both to log anything */ |
508 | if (cst_lst.ibytes==0 && cst_lst.obytes==0) return; |
442 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
443 | return; |
509 | |
444 | |
510 | /* CSSTAT is put in so scripts can easily find the line */ |
445 | /* CSSTAT is put in so scripts can easily find the line */ |
511 | LOG(llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
446 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
512 | ctime(&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
447 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
513 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, |
448 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
514 | cst_lst.max_conn, now - cst_lst.time_start); |
|
|
515 | cst_lst.ibytes=0; |
449 | cst_lst.ibytes = 0; |
516 | cst_lst.obytes=0; |
450 | cst_lst.obytes = 0; |
517 | cst_lst.max_conn=socket_info.nconns; |
451 | cst_lst.max_conn = socket_info.nconns; |
518 | cst_lst.time_start=now; |
452 | cst_lst.time_start = now; |
519 | } |
453 | } |
520 | #endif |
454 | #endif |
|
|
455 | |