1 | |
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2 | /* |
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3 | * static char *rcsid_sockets_c = |
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4 | * "$Id: lowlevel.C,v 1.1 2006/08/13 17:16:06 elmex Exp $"; |
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5 | */ |
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6 | |
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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> |
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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 | |
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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 |
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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; |
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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 | |
… | |
… | |
88 | * |
84 | * |
89 | * SockList functions/utilities |
85 | * SockList functions/utilities |
90 | * |
86 | * |
91 | **********************************************************************/ |
87 | **********************************************************************/ |
92 | |
88 | |
93 | void SockList_Init(SockList *sl) |
89 | SockList &SockList::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); |
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94 | len += v.len; |
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95 | } |
98 | |
96 | |
99 | void SockList_AddChar(SockList *sl, char c) |
97 | return *this; |
100 | { |
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101 | sl->buf[sl->len]=c; |
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102 | sl->len++; |
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103 | } |
98 | } |
104 | |
99 | |
105 | void SockList_AddShort(SockList *sl, uint16 data) |
100 | SockList &SockList::operator <<(const data8 &v) |
106 | { |
101 | { |
107 | sl->buf[sl->len++]= (data>>8)&0xff; |
102 | unsigned int len = min (v.len, 0x00FF); |
108 | sl->buf[sl->len++] = data & 0xff; |
103 | return *this << uint8 (len) << data (v.ptr, len); |
109 | } |
104 | } |
110 | |
105 | |
111 | |
106 | SockList &SockList::operator <<(const data16 &v) |
112 | void SockList_AddInt(SockList *sl, uint32 data) |
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113 | { |
107 | { |
114 | sl->buf[sl->len++]= (data>>24)&0xff; |
108 | unsigned int len = min (v.len, 0xFFFF); |
115 | sl->buf[sl->len++]= (data>>16)&0xff; |
109 | return *this << uint16 (len) << data (v.ptr, len); |
116 | sl->buf[sl->len++]= (data>>8)&0xff; |
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117 | sl->buf[sl->len++] = data & 0xff; |
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118 | } |
110 | } |
119 | |
111 | |
120 | void SockList_AddInt64(SockList *sl, uint64 data) |
112 | SockList &SockList::operator <<(const char *v) |
121 | { |
113 | { |
122 | sl->buf[sl->len++]= ( char )( (data>>56)&0xff ); |
114 | return *this << data (v, strlen (v ? v : 0)); |
123 | sl->buf[sl->len++]= ( char )( (data>>48)&0xff ); |
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124 | sl->buf[sl->len++]= ( char )( (data>>40)&0xff ); |
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125 | sl->buf[sl->len++]= ( char )( (data>>32)&0xff ); |
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126 | |
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127 | sl->buf[sl->len++]= ( char )( (data>>24)&0xff ); |
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128 | sl->buf[sl->len++]= ( char )( (data>>16)&0xff ); |
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129 | sl->buf[sl->len++]= ( char )( (data>>8)&0xff ); |
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130 | sl->buf[sl->len++] =( char )( data & 0xff ); |
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131 | } |
115 | } |
132 | |
116 | |
133 | /* Basically does the reverse of SockList_AddInt, but on |
117 | void |
134 | * strings instead. Same for the GetShort, but for 16 bits. |
118 | SockList::printf (const char *format, ...) |
135 | */ |
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136 | int GetInt_String(unsigned char *data) |
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137 | { |
119 | { |
138 | return ((data[0]<<24) + (data[1]<<16) + (data[2]<<8) + data[3]); |
120 | va_list ap; |
139 | } |
121 | va_start (ap, format); |
140 | |
122 | |
141 | short GetShort_String(unsigned char *data) { |
123 | len += vsprintf ((char *)buf + len, format, ap); |
142 | return ((data[0]<<8)+data[1]); |
124 | |
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125 | va_end (ap); |
143 | } |
126 | } |
144 | |
127 | |
145 | /****************************************************************************** |
128 | /****************************************************************************** |
146 | * |
129 | * |
147 | * Start of read routines. |
130 | * Start of read routines. |
148 | * |
131 | * |
149 | ******************************************************************************/ |
132 | ******************************************************************************/ |
150 | |
133 | |
151 | /** |
134 | int |
152 | * This reads from fd and puts the data in sl. We return true if we think |
135 | NewSocket::read_packet () |
153 | * we have a full packet, 0 if we have a partial packet. The only processing |
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154 | * we do is remove the intial size value. len (As passed) is the size of the |
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155 | * buffer allocated in the socklist. We make the assumption the buffer is |
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156 | * at least 2 bytes long. |
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157 | */ |
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158 | |
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159 | int SockList_ReadPacket(int fd, SockList *sl, int len) |
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160 | { |
136 | { |
161 | int stat,toread; |
137 | for (;;) |
162 | |
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163 | /* Sanity check - shouldn't happen */ |
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164 | if (sl->len < 0) { |
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165 | abort(); |
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166 | } |
138 | { |
167 | /* We already have a partial packet */ |
139 | if (inbuf_len >= 2) |
168 | if (sl->len<2) { |
140 | { |
169 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: change read() to recv() */ |
141 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
170 | |
142 | |
171 | stat=recv(fd, sl->buf + sl->len, 2-sl->len,0); |
143 | if (inbuf_len >= 2 + pkt_len) |
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144 | return pkt_len + 2; |
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145 | } |
172 | |
146 | |
173 | #else |
147 | int amount = sizeof (inbuf) - inbuf_len; |
174 | do { |
148 | |
175 | stat=read(fd, sl->buf + sl->len, 2-sl->len); |
149 | if (amount <= 0) |
176 | } while ((stat==-1) && (errno==EINTR)); |
150 | { |
177 | #endif |
151 | LOG (llevError, "packet too large");//TODO |
178 | if (stat<0) { |
152 | return -1; |
179 | /* In non blocking mode, EAGAIN is set when there is no |
153 | } |
180 | * data available. |
154 | |
181 | */ |
155 | amount = read (fd, inbuf + inbuf_len, amount); |
182 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: error handling for win32 */ |
156 | |
183 | if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) { |
157 | if (!amount) |
184 | if(WSAGetLastError() == WSAECONNRESET) |
158 | { |
185 | LOG(llevDebug,"Connection closed by client\n"); |
159 | status = Ns_Dead; |
186 | else |
160 | return -1; |
187 | { |
161 | } |
188 | LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError()); |
162 | else if (amount < 0) |
189 | } |
163 | { |
190 | return -1; /* kick this user! */ |
164 | if (errno != EAGAIN && errno != EINTR) |
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165 | { |
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166 | LOG (llevError, "read error: %s", strerror (errno)); |
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167 | return -1; |
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168 | } |
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169 | |
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170 | return 0; |
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171 | } |
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172 | |
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173 | inbuf_len += amount; |
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174 | |
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175 | cst_tot.ibytes += amount; |
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176 | cst_lst.ibytes += amount; |
191 | } |
177 | } |
192 | #else |
178 | } |
193 | if (errno != EAGAIN && errno !=EWOULDBLOCK) { |
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194 | LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno)); |
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195 | } |
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196 | #endif |
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197 | return 0; /*Error */ |
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198 | } |
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199 | if (stat==0) return -1; |
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200 | sl->len += stat; |
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201 | #ifdef CS_LOGSTATS |
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202 | cst_tot.ibytes += stat; |
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203 | cst_lst.ibytes += stat; |
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204 | #endif |
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205 | if (stat<2) return 0; /* Still don't have a full packet */ |
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206 | } |
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207 | /* Figure out how much more data we need to read. Add 2 from the |
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208 | * end of this - size header information is not included. |
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209 | */ |
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210 | toread = 2+(sl->buf[0] << 8) + sl->buf[1] - sl->len; |
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211 | if ((toread + sl->len) >= len) { |
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212 | LOG(llevError,"SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", |
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213 | toread + sl->len, len); |
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214 | /* Quick hack in case for 'oldsocketmode' input. If we are |
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215 | * closing the socket anyways, then reading this extra 100 bytes |
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216 | * shouldn't hurt. |
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217 | */ |
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218 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
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219 | recv(fd, sl->buf+2, 100, 0); |
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220 | #else |
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221 | read(fd, sl->buf+2, 100); |
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222 | #endif /* end win32 */ |
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223 | |
179 | |
224 | /* return error so the socket is closed */ |
180 | void |
225 | return -1; |
181 | NewSocket::skip_packet (int len) |
226 | } |
182 | { |
227 | do { |
183 | inbuf_len -= len; |
228 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
184 | memmove (inbuf, inbuf + len, inbuf_len); |
229 | stat = recv(fd, sl->buf+ sl->len, toread, 0); |
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230 | #else |
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231 | do { |
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232 | stat = read(fd, sl->buf+ sl->len, toread); |
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233 | } while ((stat<0) && (errno==EINTR)); |
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234 | #endif |
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235 | if (stat<0) { |
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236 | |
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237 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change error handling for win32 */ |
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238 | if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) { |
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239 | if(WSAGetLastError() == WSAECONNRESET) |
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240 | LOG(llevDebug,"Connection closed by client\n"); |
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241 | else |
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242 | { |
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243 | LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError()); |
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244 | } |
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245 | return -1; /* kick this user! */ |
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246 | } |
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247 | #else |
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248 | if (errno != EAGAIN && errno !=EWOULDBLOCK) { |
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249 | LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno)); |
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250 | } |
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251 | #endif |
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252 | return 0; /*Error */ |
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253 | } |
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254 | if (stat==0) return -1; |
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255 | sl->len += stat; |
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256 | #ifdef CS_LOGSTATS |
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257 | cst_tot.ibytes += stat; |
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258 | cst_lst.ibytes += stat; |
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259 | #endif |
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260 | toread -= stat; |
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261 | if (toread==0) return 1; |
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262 | if (toread < 0) { |
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263 | LOG(llevError,"SockList_ReadPacket: Read more bytes than desired.\n"); |
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264 | return 1; |
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265 | } |
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266 | } while (toread>0); |
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267 | return 0; |
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268 | } |
185 | } |
269 | |
186 | |
270 | /******************************************************************************* |
187 | /******************************************************************************* |
271 | * |
188 | * |
272 | * Start of write related routines. |
189 | * Start of write related routines. |
… | |
… | |
278 | * |
195 | * |
279 | * 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 |
280 | * data, and len is the number of bytes to add. |
197 | * data, and len is the number of bytes to add. |
281 | */ |
198 | */ |
282 | |
199 | |
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200 | static void |
283 | static void add_to_buffer(NewSocket *ns, char *buf, int len) |
201 | add_to_buffer (NewSocket *ns, char *buf, int len) |
284 | { |
202 | { |
285 | int avail, end; |
203 | int avail, end; |
286 | |
204 | |
287 | if ((len+ns->outputbuffer.len)>SOCKETBUFSIZE) { |
205 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
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206 | { |
288 | 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); |
289 | ns->fd); |
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290 | ns->status = Ns_Dead; |
208 | ns->status = Ns_Dead; |
291 | return; |
209 | return; |
292 | } |
210 | } |
293 | |
211 | |
294 | /* 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 |
295 | * currently in use is actually data + end -1 |
213 | * currently in use is actually data + end -1 |
296 | */ |
214 | */ |
297 | |
215 | |
298 | end=ns->outputbuffer.start + ns->outputbuffer.len; |
216 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
299 | /* The buffer is already in a wrapped state, so adjust end */ |
217 | /* The buffer is already in a wrapped state, so adjust end */ |
300 | if (end>=SOCKETBUFSIZE) end-=SOCKETBUFSIZE; |
218 | if (end >= SOCKETBUFSIZE) |
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219 | end -= SOCKETBUFSIZE; |
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220 | |
301 | avail=SOCKETBUFSIZE - end; |
221 | avail = SOCKETBUFSIZE - end; |
302 | |
222 | |
303 | /* We can all fit it behind the current data without wrapping */ |
223 | /* We can all fit it behind the current data without wrapping */ |
304 | if (avail >=len ) { |
224 | if (avail >= len) |
305 | memcpy(ns->outputbuffer.data + end, buf, len); |
225 | memcpy (ns->outputbuffer.data + end, buf, len); |
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226 | else |
306 | } |
227 | { |
307 | else { |
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308 | memcpy(ns->outputbuffer.data + end, buf, avail); |
228 | memcpy (ns->outputbuffer.data + end, buf, avail); |
309 | memcpy(ns->outputbuffer.data, buf+avail, len-avail); |
229 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
310 | } |
230 | } |
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231 | |
311 | ns->outputbuffer.len += len; |
232 | ns->outputbuffer.len += len; |
312 | #if 0 |
233 | #if 0 |
313 | 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); |
314 | ns->outputbuffer.len, ns->outputbuffer.start); |
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315 | #endif |
235 | #endif |
316 | } |
236 | } |
317 | |
237 | |
318 | /** |
238 | /** |
319 | * Writes data to socket. |
239 | * Writes data to socket. |
320 | * |
240 | * |
321 | * 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 |
322 | * is called to write it out. |
242 | * is called to write it out. |
323 | */ |
243 | */ |
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244 | void |
324 | void write_socket_buffer(NewSocket *ns) |
245 | write_socket_buffer (NewSocket * ns) |
325 | { |
246 | { |
326 | int amt, max; |
247 | int amt, max; |
327 | |
248 | |
328 | if (ns->outputbuffer.len==0) { |
249 | if (ns->outputbuffer.len == 0) |
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250 | { |
329 | 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); |
330 | ns->fd); |
252 | return; |
331 | return; |
253 | } |
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254 | |
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255 | do |
332 | } |
256 | { |
333 | |
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334 | do { |
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335 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
257 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
336 | if (ns->outputbuffer.len<max) max = ns->outputbuffer.len; |
258 | if (ns->outputbuffer.len < max) |
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259 | max = ns->outputbuffer.len; |
337 | |
260 | |
338 | #ifdef WIN32 /* ***win32 write_socket_buffer: change write() to send() */ |
261 | do |
339 | amt=send(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max,0); |
262 | { |
340 | #else |
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341 | do { |
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342 | amt=write(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
263 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
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264 | } |
343 | } while ((amt<0) && (errno==EINTR)); |
265 | while ((amt < 0) && (errno == EINTR)); |
344 | #endif |
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345 | |
266 | |
346 | if (amt < 0) { /* We got an error */ |
267 | if (amt < 0) |
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268 | { /* We got an error */ |
347 | |
269 | |
348 | #ifdef WIN32 /* ***win32 write_socket_buffer: change error handling */ |
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349 | if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) { |
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350 | LOG(llevError,"New socket write failed (wsb) (%d).\n", WSAGetLastError()); |
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351 | #else |
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352 | if (errno !=EWOULDBLOCK) { |
270 | if (errno != EWOULDBLOCK) |
353 | LOG(llevError,"New socket write failed (wsb) (%d: %s).\n", |
271 | { |
354 | errno, strerror_local(errno)); |
272 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
355 | #endif |
273 | ns->status = Ns_Dead; |
356 | ns->status=Ns_Dead; |
274 | return; |
357 | return; |
275 | } |
358 | } |
276 | else |
359 | else { /* EWOULDBLOCK */ |
277 | { /* EWOULDBLOCK */ |
360 | /* can't write it, so store it away. */ |
278 | /* can't write it, so store it away. */ |
361 | ns->can_write=0; |
279 | ns->can_write = 0; |
362 | return; |
280 | return; |
363 | } |
281 | } |
364 | } |
282 | } |
365 | ns->outputbuffer.start += amt; |
283 | ns->outputbuffer.start += amt; |
366 | /* wrap back to start of buffer */ |
284 | /* wrap back to start of buffer */ |
367 | if (ns->outputbuffer.start==SOCKETBUFSIZE) ns->outputbuffer.start=0; |
285 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
286 | ns->outputbuffer.start = 0; |
368 | ns->outputbuffer.len -= amt; |
287 | ns->outputbuffer.len -= amt; |
369 | #ifdef CS_LOGSTATS |
288 | #ifdef CS_LOGSTATS |
370 | cst_tot.obytes += amt; |
289 | cst_tot.obytes += amt; |
371 | cst_lst.obytes += amt; |
290 | cst_lst.obytes += amt; |
372 | #endif |
291 | #endif |
|
|
292 | } |
373 | } while (ns->outputbuffer.len>0); |
293 | while (ns->outputbuffer.len > 0); |
374 | } |
294 | } |
375 | |
295 | |
376 | /** |
296 | /** |
377 | * This writes data to the socket. - It is very low level - |
297 | * This writes data to the socket. - It is very low level - |
378 | * 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 |
379 | * 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 |
380 | * of bytes to write. IT doesn't return anything - rather, it |
300 | * of bytes to write. IT doesn't return anything - rather, it |
381 | * updates the ns structure if we get an error. |
301 | * updates the ns structure if we get an error. |
382 | */ |
302 | */ |
|
|
303 | void |
383 | void Write_To_Socket(NewSocket *ns, char *buf, int len) |
304 | Write_To_Socket (NewSocket * ns, char *buf, int len) |
384 | { |
305 | { |
385 | int amt=0; |
306 | int amt = 0; |
386 | char *pos=buf; |
307 | char *pos = buf; |
387 | |
308 | |
388 | if (ns->status == Ns_Dead || !buf) { |
309 | if (ns->status == Ns_Dead || !buf) |
|
|
310 | { |
389 | LOG(llevDebug,"Write_To_Socket called with dead socket\n"); |
311 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
390 | return; |
312 | return; |
391 | } |
313 | } |
392 | |
314 | |
393 | #ifndef __GNU__ /* This caused problems on Hurd */ |
315 | #ifndef __GNU__ /* This caused problems on Hurd */ |
394 | if (!ns->can_write) { |
316 | if (!ns->can_write) |
|
|
317 | { |
395 | add_to_buffer(ns, buf, len); |
318 | add_to_buffer (ns, buf, len); |
396 | return; |
319 | return; |
397 | } |
320 | } |
398 | #endif |
321 | #endif |
399 | /* 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 */ |
400 | while (len>0) { |
323 | while (len > 0) |
|
|
324 | { |
401 | |
325 | |
402 | #ifdef WIN32 /* ***win32 Write_To_Socket: change write() to send() */ |
326 | do |
403 | amt=send(ns->fd, pos, len,0); |
327 | { |
404 | #else |
|
|
405 | do { |
|
|
406 | amt=write(ns->fd, pos, len); |
328 | amt = write (ns->fd, pos, len); |
|
|
329 | } |
407 | } while ((amt<0) && (errno==EINTR)); |
330 | while ((amt < 0) && (errno == EINTR)); |
408 | #endif |
|
|
409 | |
331 | |
410 | if (amt < 0) { /* We got an error */ |
332 | if (amt < 0) |
411 | #ifdef WIN32 /* ***win32 Write_To_Socket: change error handling */ |
333 | { /* We got an error */ |
412 | if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) { |
|
|
413 | LOG(llevError,"New socket write failed WTS (%d).\n",WSAGetLastError()); |
|
|
414 | #else |
|
|
415 | if (errno !=EWOULDBLOCK) { |
334 | if (errno != EWOULDBLOCK) |
|
|
335 | { |
416 | LOG(llevError,"New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
336 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
417 | errno, strerror_local(errno)); |
337 | errno, strerror (errno)); |
418 | #endif |
338 | ns->status = Ns_Dead; |
419 | ns->status=Ns_Dead; |
339 | return; |
420 | return; |
340 | } |
421 | } |
341 | else |
422 | else { /* EWOULDBLOCK */ |
342 | { /* EWOULDBLOCK */ |
423 | /* can't write it, so store it away. */ |
343 | /* can't write it, so store it away. */ |
424 | add_to_buffer(ns, pos, len); |
344 | add_to_buffer (ns, pos, len); |
425 | ns->can_write=0; |
345 | ns->can_write = 0; |
426 | return; |
346 | return; |
427 | } |
347 | } |
428 | } |
348 | } |
429 | /* 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 |
430 | * an else if to make sure we don't reprocess it. |
350 | * an else if to make sure we don't reprocess it. |
431 | */ |
351 | */ |
432 | else if (amt==0) { |
352 | else if (amt == 0) |
|
|
353 | { |
433 | LOG(llevError,"Write_To_Socket: No data written out.\n"); |
354 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
434 | } |
355 | } |
435 | len -= amt; |
356 | len -= amt; |
436 | pos += amt; |
357 | pos += amt; |
437 | #ifdef CS_LOGSTATS |
358 | #ifdef CS_LOGSTATS |
438 | cst_tot.obytes += amt; |
359 | cst_tot.obytes += amt; |
439 | cst_lst.obytes += amt; |
360 | cst_lst.obytes += amt; |
440 | #endif |
361 | #endif |
441 | } |
362 | } |
442 | } |
363 | } |
443 | |
364 | |
444 | |
365 | |
445 | /** |
366 | /** |
446 | * Takes a string of data, and writes it out to the socket. A very handy |
367 | * Takes a string of data, and writes it out to the socket. A very handy |
447 | * shortcut function. |
368 | * shortcut function. |
448 | */ |
369 | */ |
|
|
370 | void |
449 | void cs_write_string(NewSocket *ns, const char *buf, int len) |
371 | cs_write_string (NewSocket *ns, const char *buf, int len) |
450 | { |
372 | { |
451 | SockList sl; |
373 | SockList sl; |
452 | |
374 | |
453 | sl.len = len; |
375 | sl.len = len; |
454 | sl.buf = (unsigned char*)buf; |
376 | sl.buf = (unsigned char *) buf; |
455 | Send_With_Handling(ns, &sl); |
377 | Send_With_Handling (ns, &sl); |
456 | } |
378 | } |
457 | |
379 | |
458 | |
380 | |
459 | /** |
381 | /** |
460 | * Calls Write_To_Socket to send data to the client. |
382 | * Calls Write_To_Socket to send data to the client. |
461 | * |
383 | * |
462 | * The only difference in this function is that we take a SockList |
384 | * The only difference in this function is that we take a SockList |
463 | *, and we prepend the length information. |
385 | *, and we prepend the length information. |
464 | */ |
386 | */ |
|
|
387 | void |
465 | void Send_With_Handling(NewSocket *ns,SockList *msg) |
388 | Send_With_Handling (NewSocket *ns, SockList *msg) |
466 | { |
389 | { |
467 | unsigned char sbuf[4]; |
390 | unsigned char sbuf[4]; |
468 | |
391 | |
469 | if (ns->status == Ns_Dead || !msg) |
392 | if (ns->status == Ns_Dead || !msg) |
470 | return; |
393 | return; |
471 | |
394 | |
472 | if (msg->len >= MAXSOCKBUF) { |
395 | if (msg->len >= MAXSOCKBUF) |
|
|
396 | { |
473 | LOG(llevError,"Trying to send a buffer beyond properly size, len =%d\n", |
397 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); |
474 | msg->len); |
|
|
475 | /* Almost certainly we've overflowed a buffer, so quite now to make |
398 | /* Almost certainly we've overflowed a buffer, so quite now to make |
476 | * it easier to debug. |
399 | * it easier to debug. |
477 | */ |
400 | */ |
478 | abort(); |
401 | abort (); |
479 | } |
402 | } |
480 | sbuf[0] = ((uint32)(msg->len) >> 8) & 0xFF; |
403 | sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF; |
481 | sbuf[1] = ((uint32)(msg->len)) & 0xFF; |
404 | sbuf[1] = ((uint32) (msg->len)) & 0xFF; |
482 | if (ns->status != Ns_Old) |
405 | if (ns->status != Ns_Old) |
483 | Write_To_Socket(ns, (char *) sbuf, 2); |
406 | Write_To_Socket (ns, (char *) sbuf, 2); |
484 | Write_To_Socket(ns, (char*)msg->buf, msg->len); |
407 | Write_To_Socket (ns, (char *) msg->buf, msg->len); |
485 | } |
408 | } |
486 | |
409 | |
487 | /** |
410 | /** |
488 | * Takes a string of data, and writes it out to the socket. A very handy |
411 | * Takes a string of data, and writes it out to the socket. A very handy |
489 | * shortcut function. |
412 | * shortcut function. |
490 | */ |
413 | */ |
|
|
414 | void |
491 | void Write_String_To_Socket(NewSocket *ns, char *buf, int len) |
415 | Write_String_To_Socket (NewSocket *ns, char *buf, int len) |
492 | { |
416 | { |
493 | SockList sl; |
417 | SockList sl; |
494 | |
418 | |
495 | sl.len = len; |
419 | sl.len = len; |
496 | sl.buf = (unsigned char*) buf; |
420 | sl.buf = (unsigned char *) buf; |
497 | Send_With_Handling(ns, &sl); |
421 | Send_With_Handling (ns, &sl); |
498 | } |
422 | } |
499 | |
423 | |
500 | |
424 | |
501 | /****************************************************************************** |
425 | /****************************************************************************** |
502 | * |
426 | * |
503 | * statistics logging functions. |
427 | * statistics logging functions. |
504 | * |
428 | * |
505 | ******************************************************************************/ |
429 | ******************************************************************************/ |
506 | |
430 | |
507 | #ifdef CS_LOGSTATS |
431 | #ifdef CS_LOGSTATS |
|
|
432 | |
508 | /* cst_tot is for the life of the server, cst_last is for the last series of |
433 | /* cst_tot is for the life of the server, cst_last is for the last series of |
509 | * stats |
434 | * stats |
510 | */ |
435 | */ |
511 | CS_Stats cst_tot, cst_lst; |
436 | CS_Stats cst_tot, cst_lst; |
512 | |
437 | |
513 | /** |
438 | /** |
514 | * Writes out the gathered stats. We clear cst_lst. |
439 | * Writes out the gathered stats. We clear cst_lst. |
515 | */ |
440 | */ |
|
|
441 | void |
516 | void write_cs_stats(void) |
442 | write_cs_stats (void) |
517 | { |
443 | { |
518 | time_t now=time(NULL); |
444 | time_t now = time (NULL); |
519 | |
445 | |
520 | /* If no connections recently, don't both to log anything */ |
446 | /* If no connections recently, don't both to log anything */ |
521 | if (cst_lst.ibytes==0 && cst_lst.obytes==0) return; |
447 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
448 | return; |
522 | |
449 | |
523 | /* CSSTAT is put in so scripts can easily find the line */ |
450 | /* CSSTAT is put in so scripts can easily find the line */ |
524 | LOG(llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
451 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
525 | ctime(&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
452 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
526 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, |
453 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
527 | cst_lst.max_conn, now - cst_lst.time_start); |
|
|
528 | cst_lst.ibytes=0; |
454 | cst_lst.ibytes = 0; |
529 | cst_lst.obytes=0; |
455 | cst_lst.obytes = 0; |
530 | cst_lst.max_conn=socket_info.nconns; |
456 | cst_lst.max_conn = socket_info.nconns; |
531 | cst_lst.time_start=now; |
457 | cst_lst.time_start = now; |
532 | } |
458 | } |
533 | #endif |
459 | #endif |
|
|
460 | |