root / slirp / slirp.c @ 192c7bd9
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1 | f0cbd3ec | bellard | #include "slirp.h" |
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2 | f0cbd3ec | bellard | |
3 | f0cbd3ec | bellard | /* host address */
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4 | f0cbd3ec | bellard | struct in_addr our_addr;
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5 | f0cbd3ec | bellard | /* host dns address */
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6 | f0cbd3ec | bellard | struct in_addr dns_addr;
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7 | f0cbd3ec | bellard | /* host loopback address */
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8 | f0cbd3ec | bellard | struct in_addr loopback_addr;
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9 | f0cbd3ec | bellard | |
10 | f0cbd3ec | bellard | /* address for slirp virtual addresses */
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11 | f0cbd3ec | bellard | struct in_addr special_addr;
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12 | f0cbd3ec | bellard | |
13 | f0cbd3ec | bellard | const uint8_t special_ethaddr[6] = { |
14 | f0cbd3ec | bellard | 0x52, 0x54, 0x00, 0x12, 0x35, 0x00 |
15 | f0cbd3ec | bellard | }; |
16 | f0cbd3ec | bellard | |
17 | f0cbd3ec | bellard | uint8_t client_ethaddr[6];
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18 | f0cbd3ec | bellard | |
19 | f0cbd3ec | bellard | int do_slowtimo;
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20 | f0cbd3ec | bellard | int link_up;
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21 | f0cbd3ec | bellard | struct timeval tt;
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22 | f0cbd3ec | bellard | FILE *lfd; |
23 | a3d4af03 | bellard | struct ex_list *exec_list;
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24 | f0cbd3ec | bellard | |
25 | f0cbd3ec | bellard | /* XXX: suppress those select globals */
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26 | f0cbd3ec | bellard | fd_set *global_readfds, *global_writefds, *global_xfds; |
27 | f0cbd3ec | bellard | |
28 | f0cbd3ec | bellard | #ifdef _WIN32
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29 | f0cbd3ec | bellard | |
30 | f0cbd3ec | bellard | static int get_dns_addr(struct in_addr *pdns_addr) |
31 | f0cbd3ec | bellard | { |
32 | 379ff53d | bellard | FIXED_INFO *FixedInfo=NULL;
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33 | 379ff53d | bellard | ULONG BufLen; |
34 | 379ff53d | bellard | DWORD ret; |
35 | 379ff53d | bellard | IP_ADDR_STRING *pIPAddr; |
36 | 379ff53d | bellard | struct in_addr tmp_addr;
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37 | 379ff53d | bellard | |
38 | 379ff53d | bellard | FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
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39 | 379ff53d | bellard | BufLen = sizeof(FIXED_INFO);
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40 | 379ff53d | bellard | |
41 | 379ff53d | bellard | if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) {
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42 | 379ff53d | bellard | if (FixedInfo) {
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43 | 379ff53d | bellard | GlobalFree(FixedInfo); |
44 | 379ff53d | bellard | FixedInfo = NULL;
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45 | 379ff53d | bellard | } |
46 | 379ff53d | bellard | FixedInfo = GlobalAlloc(GPTR, BufLen); |
47 | 379ff53d | bellard | } |
48 | 379ff53d | bellard | |
49 | 379ff53d | bellard | if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) {
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50 | 379ff53d | bellard | printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret );
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51 | 379ff53d | bellard | if (FixedInfo) {
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52 | 379ff53d | bellard | GlobalFree(FixedInfo); |
53 | 379ff53d | bellard | FixedInfo = NULL;
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54 | 379ff53d | bellard | } |
55 | 379ff53d | bellard | return -1; |
56 | 379ff53d | bellard | } |
57 | 379ff53d | bellard | |
58 | 379ff53d | bellard | pIPAddr = &(FixedInfo->DnsServerList); |
59 | 379ff53d | bellard | inet_aton(pIPAddr->IpAddress.String, &tmp_addr); |
60 | 379ff53d | bellard | *pdns_addr = tmp_addr; |
61 | 379ff53d | bellard | #if 0
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62 | 379ff53d | bellard | printf( "DNS Servers:\n" );
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63 | 379ff53d | bellard | printf( "DNS Addr:%s\n", pIPAddr->IpAddress.String );
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64 | 379ff53d | bellard |
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65 | 379ff53d | bellard | pIPAddr = FixedInfo -> DnsServerList.Next;
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66 | 379ff53d | bellard | while ( pIPAddr ) {
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67 | 379ff53d | bellard | printf( "DNS Addr:%s\n", pIPAddr ->IpAddress.String );
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68 | 379ff53d | bellard | pIPAddr = pIPAddr ->Next;
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69 | 379ff53d | bellard | }
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70 | 379ff53d | bellard | #endif
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71 | 379ff53d | bellard | if (FixedInfo) {
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72 | 379ff53d | bellard | GlobalFree(FixedInfo); |
73 | 379ff53d | bellard | FixedInfo = NULL;
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74 | 379ff53d | bellard | } |
75 | 379ff53d | bellard | return 0; |
76 | f0cbd3ec | bellard | } |
77 | f0cbd3ec | bellard | |
78 | f0cbd3ec | bellard | #else
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79 | f0cbd3ec | bellard | |
80 | f0cbd3ec | bellard | static int get_dns_addr(struct in_addr *pdns_addr) |
81 | f0cbd3ec | bellard | { |
82 | f0cbd3ec | bellard | char buff[512]; |
83 | f0cbd3ec | bellard | char buff2[256]; |
84 | f0cbd3ec | bellard | FILE *f; |
85 | f0cbd3ec | bellard | int found = 0; |
86 | f0cbd3ec | bellard | struct in_addr tmp_addr;
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87 | f0cbd3ec | bellard | |
88 | f0cbd3ec | bellard | f = fopen("/etc/resolv.conf", "r"); |
89 | f0cbd3ec | bellard | if (!f)
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90 | f0cbd3ec | bellard | return -1; |
91 | f0cbd3ec | bellard | |
92 | f0cbd3ec | bellard | lprint("IP address of your DNS(s): ");
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93 | f0cbd3ec | bellard | while (fgets(buff, 512, f) != NULL) { |
94 | f0cbd3ec | bellard | if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) { |
95 | f0cbd3ec | bellard | if (!inet_aton(buff2, &tmp_addr))
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96 | f0cbd3ec | bellard | continue;
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97 | f0cbd3ec | bellard | if (tmp_addr.s_addr == loopback_addr.s_addr)
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98 | f0cbd3ec | bellard | tmp_addr = our_addr; |
99 | f0cbd3ec | bellard | /* If it's the first one, set it to dns_addr */
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100 | f0cbd3ec | bellard | if (!found)
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101 | f0cbd3ec | bellard | *pdns_addr = tmp_addr; |
102 | f0cbd3ec | bellard | else
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103 | f0cbd3ec | bellard | lprint(", ");
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104 | f0cbd3ec | bellard | if (++found > 3) { |
105 | f0cbd3ec | bellard | lprint("(more)");
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106 | f0cbd3ec | bellard | break;
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107 | f0cbd3ec | bellard | } else
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108 | f0cbd3ec | bellard | lprint("%s", inet_ntoa(tmp_addr));
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109 | f0cbd3ec | bellard | } |
110 | f0cbd3ec | bellard | } |
111 | 1d43a717 | bellard | fclose(f); |
112 | f0cbd3ec | bellard | if (!found)
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113 | f0cbd3ec | bellard | return -1; |
114 | f0cbd3ec | bellard | return 0; |
115 | f0cbd3ec | bellard | } |
116 | f0cbd3ec | bellard | |
117 | f0cbd3ec | bellard | #endif
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118 | f0cbd3ec | bellard | |
119 | 379ff53d | bellard | #ifdef _WIN32
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120 | 379ff53d | bellard | void slirp_cleanup(void) |
121 | 379ff53d | bellard | { |
122 | 379ff53d | bellard | WSACleanup(); |
123 | 379ff53d | bellard | } |
124 | 379ff53d | bellard | #endif
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125 | 379ff53d | bellard | |
126 | f0cbd3ec | bellard | void slirp_init(void) |
127 | f0cbd3ec | bellard | { |
128 | 512176db | bellard | // debug_init("/tmp/slirp.log", DEBUG_DEFAULT);
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129 | 1d43a717 | bellard | |
130 | 379ff53d | bellard | #ifdef _WIN32
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131 | 379ff53d | bellard | { |
132 | 379ff53d | bellard | WSADATA Data; |
133 | 379ff53d | bellard | WSAStartup(MAKEWORD(2,0), &Data); |
134 | 379ff53d | bellard | atexit(slirp_cleanup); |
135 | 379ff53d | bellard | } |
136 | 379ff53d | bellard | #endif
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137 | 379ff53d | bellard | |
138 | f0cbd3ec | bellard | link_up = 1;
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139 | f0cbd3ec | bellard | |
140 | f0cbd3ec | bellard | if_init(); |
141 | f0cbd3ec | bellard | ip_init(); |
142 | f0cbd3ec | bellard | |
143 | f0cbd3ec | bellard | /* Initialise mbufs *after* setting the MTU */
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144 | f0cbd3ec | bellard | m_init(); |
145 | f0cbd3ec | bellard | |
146 | f0cbd3ec | bellard | /* set default addresses */
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147 | f0cbd3ec | bellard | getouraddr(); |
148 | f0cbd3ec | bellard | inet_aton("127.0.0.1", &loopback_addr);
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149 | f0cbd3ec | bellard | |
150 | f0cbd3ec | bellard | if (get_dns_addr(&dns_addr) < 0) { |
151 | f0cbd3ec | bellard | fprintf(stderr, "Could not get DNS address\n");
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152 | f0cbd3ec | bellard | exit(1);
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153 | f0cbd3ec | bellard | } |
154 | f0cbd3ec | bellard | |
155 | f0cbd3ec | bellard | inet_aton(CTL_SPECIAL, &special_addr); |
156 | f0cbd3ec | bellard | } |
157 | f0cbd3ec | bellard | |
158 | f0cbd3ec | bellard | #define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
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159 | f0cbd3ec | bellard | #define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
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160 | f0cbd3ec | bellard | #define UPD_NFDS(x) if (nfds < (x)) nfds = (x) |
161 | f0cbd3ec | bellard | |
162 | f0cbd3ec | bellard | /*
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163 | f0cbd3ec | bellard | * curtime kept to an accuracy of 1ms
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164 | f0cbd3ec | bellard | */
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165 | 379ff53d | bellard | #ifdef _WIN32
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166 | 379ff53d | bellard | static void updtime(void) |
167 | 379ff53d | bellard | { |
168 | 379ff53d | bellard | struct _timeb tb;
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169 | 379ff53d | bellard | |
170 | 379ff53d | bellard | _ftime(&tb); |
171 | 379ff53d | bellard | curtime = (u_int)tb.time * (u_int)1000;
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172 | 379ff53d | bellard | curtime += (u_int)tb.millitm; |
173 | 379ff53d | bellard | } |
174 | 379ff53d | bellard | #else
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175 | f0cbd3ec | bellard | static void updtime(void) |
176 | f0cbd3ec | bellard | { |
177 | f0cbd3ec | bellard | gettimeofday(&tt, 0);
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178 | f0cbd3ec | bellard | |
179 | f0cbd3ec | bellard | curtime = (u_int)tt.tv_sec * (u_int)1000;
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180 | f0cbd3ec | bellard | curtime += (u_int)tt.tv_usec / (u_int)1000;
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181 | f0cbd3ec | bellard | |
182 | f0cbd3ec | bellard | if ((tt.tv_usec % 1000) >= 500) |
183 | f0cbd3ec | bellard | curtime++; |
184 | f0cbd3ec | bellard | } |
185 | 379ff53d | bellard | #endif
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186 | f0cbd3ec | bellard | |
187 | f0cbd3ec | bellard | void slirp_select_fill(int *pnfds, |
188 | f0cbd3ec | bellard | fd_set *readfds, fd_set *writefds, fd_set *xfds) |
189 | f0cbd3ec | bellard | { |
190 | f0cbd3ec | bellard | struct socket *so, *so_next;
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191 | f0cbd3ec | bellard | struct timeval timeout;
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192 | f0cbd3ec | bellard | int nfds;
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193 | f0cbd3ec | bellard | int tmp_time;
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194 | f0cbd3ec | bellard | |
195 | f0cbd3ec | bellard | /* fail safe */
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196 | f0cbd3ec | bellard | global_readfds = NULL;
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197 | f0cbd3ec | bellard | global_writefds = NULL;
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198 | f0cbd3ec | bellard | global_xfds = NULL;
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199 | f0cbd3ec | bellard | |
200 | f0cbd3ec | bellard | nfds = *pnfds; |
201 | f0cbd3ec | bellard | /*
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202 | f0cbd3ec | bellard | * First, TCP sockets
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203 | f0cbd3ec | bellard | */
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204 | f0cbd3ec | bellard | do_slowtimo = 0;
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205 | f0cbd3ec | bellard | if (link_up) {
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206 | f0cbd3ec | bellard | /*
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207 | f0cbd3ec | bellard | * *_slowtimo needs calling if there are IP fragments
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208 | f0cbd3ec | bellard | * in the fragment queue, or there are TCP connections active
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209 | f0cbd3ec | bellard | */
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210 | f0cbd3ec | bellard | do_slowtimo = ((tcb.so_next != &tcb) || |
211 | f0cbd3ec | bellard | ((struct ipasfrag *)&ipq != (struct ipasfrag *)ipq.next)); |
212 | f0cbd3ec | bellard | |
213 | f0cbd3ec | bellard | for (so = tcb.so_next; so != &tcb; so = so_next) {
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214 | f0cbd3ec | bellard | so_next = so->so_next; |
215 | f0cbd3ec | bellard | |
216 | f0cbd3ec | bellard | /*
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217 | f0cbd3ec | bellard | * See if we need a tcp_fasttimo
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218 | f0cbd3ec | bellard | */
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219 | f0cbd3ec | bellard | if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) |
220 | f0cbd3ec | bellard | time_fasttimo = curtime; /* Flag when we want a fasttimo */
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221 | f0cbd3ec | bellard | |
222 | f0cbd3ec | bellard | /*
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223 | f0cbd3ec | bellard | * NOFDREF can include still connecting to local-host,
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224 | f0cbd3ec | bellard | * newly socreated() sockets etc. Don't want to select these.
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225 | f0cbd3ec | bellard | */
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226 | f0cbd3ec | bellard | if (so->so_state & SS_NOFDREF || so->s == -1) |
227 | f0cbd3ec | bellard | continue;
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228 | f0cbd3ec | bellard | |
229 | f0cbd3ec | bellard | /*
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230 | f0cbd3ec | bellard | * Set for reading sockets which are accepting
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231 | f0cbd3ec | bellard | */
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232 | f0cbd3ec | bellard | if (so->so_state & SS_FACCEPTCONN) {
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233 | f0cbd3ec | bellard | FD_SET(so->s, readfds); |
234 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
235 | f0cbd3ec | bellard | continue;
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236 | f0cbd3ec | bellard | } |
237 | f0cbd3ec | bellard | |
238 | f0cbd3ec | bellard | /*
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239 | f0cbd3ec | bellard | * Set for writing sockets which are connecting
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240 | f0cbd3ec | bellard | */
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241 | f0cbd3ec | bellard | if (so->so_state & SS_ISFCONNECTING) {
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242 | f0cbd3ec | bellard | FD_SET(so->s, writefds); |
243 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
244 | f0cbd3ec | bellard | continue;
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245 | f0cbd3ec | bellard | } |
246 | f0cbd3ec | bellard | |
247 | f0cbd3ec | bellard | /*
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248 | f0cbd3ec | bellard | * Set for writing if we are connected, can send more, and
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249 | f0cbd3ec | bellard | * we have something to send
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250 | f0cbd3ec | bellard | */
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251 | f0cbd3ec | bellard | if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
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252 | f0cbd3ec | bellard | FD_SET(so->s, writefds); |
253 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
254 | f0cbd3ec | bellard | } |
255 | f0cbd3ec | bellard | |
256 | f0cbd3ec | bellard | /*
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257 | f0cbd3ec | bellard | * Set for reading (and urgent data) if we are connected, can
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258 | f0cbd3ec | bellard | * receive more, and we have room for it XXX /2 ?
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259 | f0cbd3ec | bellard | */
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260 | f0cbd3ec | bellard | if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { |
261 | f0cbd3ec | bellard | FD_SET(so->s, readfds); |
262 | f0cbd3ec | bellard | FD_SET(so->s, xfds); |
263 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
264 | f0cbd3ec | bellard | } |
265 | f0cbd3ec | bellard | } |
266 | f0cbd3ec | bellard | |
267 | f0cbd3ec | bellard | /*
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268 | f0cbd3ec | bellard | * UDP sockets
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269 | f0cbd3ec | bellard | */
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270 | f0cbd3ec | bellard | for (so = udb.so_next; so != &udb; so = so_next) {
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271 | f0cbd3ec | bellard | so_next = so->so_next; |
272 | f0cbd3ec | bellard | |
273 | f0cbd3ec | bellard | /*
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274 | f0cbd3ec | bellard | * See if it's timed out
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275 | f0cbd3ec | bellard | */
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276 | f0cbd3ec | bellard | if (so->so_expire) {
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277 | f0cbd3ec | bellard | if (so->so_expire <= curtime) {
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278 | f0cbd3ec | bellard | udp_detach(so); |
279 | f0cbd3ec | bellard | continue;
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280 | f0cbd3ec | bellard | } else
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281 | f0cbd3ec | bellard | do_slowtimo = 1; /* Let socket expire */ |
282 | f0cbd3ec | bellard | } |
283 | f0cbd3ec | bellard | |
284 | f0cbd3ec | bellard | /*
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285 | f0cbd3ec | bellard | * When UDP packets are received from over the
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286 | f0cbd3ec | bellard | * link, they're sendto()'d straight away, so
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287 | f0cbd3ec | bellard | * no need for setting for writing
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288 | f0cbd3ec | bellard | * Limit the number of packets queued by this session
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289 | f0cbd3ec | bellard | * to 4. Note that even though we try and limit this
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290 | f0cbd3ec | bellard | * to 4 packets, the session could have more queued
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291 | f0cbd3ec | bellard | * if the packets needed to be fragmented
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292 | f0cbd3ec | bellard | * (XXX <= 4 ?)
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293 | f0cbd3ec | bellard | */
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294 | f0cbd3ec | bellard | if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { |
295 | f0cbd3ec | bellard | FD_SET(so->s, readfds); |
296 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
297 | f0cbd3ec | bellard | } |
298 | f0cbd3ec | bellard | } |
299 | f0cbd3ec | bellard | } |
300 | f0cbd3ec | bellard | |
301 | f0cbd3ec | bellard | /*
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302 | f0cbd3ec | bellard | * Setup timeout to use minimum CPU usage, especially when idle
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303 | f0cbd3ec | bellard | */
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304 | f0cbd3ec | bellard | |
305 | f0cbd3ec | bellard | /*
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306 | f0cbd3ec | bellard | * First, see the timeout needed by *timo
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307 | f0cbd3ec | bellard | */
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308 | f0cbd3ec | bellard | timeout.tv_sec = 0;
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309 | f0cbd3ec | bellard | timeout.tv_usec = -1;
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310 | f0cbd3ec | bellard | /*
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311 | f0cbd3ec | bellard | * If a slowtimo is needed, set timeout to 500ms from the last
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312 | f0cbd3ec | bellard | * slow timeout. If a fast timeout is needed, set timeout within
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313 | f0cbd3ec | bellard | * 200ms of when it was requested.
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314 | f0cbd3ec | bellard | */
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315 | f0cbd3ec | bellard | if (do_slowtimo) {
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316 | f0cbd3ec | bellard | /* XXX + 10000 because some select()'s aren't that accurate */
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317 | f0cbd3ec | bellard | timeout.tv_usec = ((500 - (curtime - last_slowtimo)) * 1000) + 10000; |
318 | f0cbd3ec | bellard | if (timeout.tv_usec < 0) |
319 | f0cbd3ec | bellard | timeout.tv_usec = 0;
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320 | f0cbd3ec | bellard | else if (timeout.tv_usec > 510000) |
321 | f0cbd3ec | bellard | timeout.tv_usec = 510000;
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322 | f0cbd3ec | bellard | |
323 | f0cbd3ec | bellard | /* Can only fasttimo if we also slowtimo */
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324 | f0cbd3ec | bellard | if (time_fasttimo) {
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325 | f0cbd3ec | bellard | tmp_time = (200 - (curtime - time_fasttimo)) * 1000; |
326 | f0cbd3ec | bellard | if (tmp_time < 0) |
327 | f0cbd3ec | bellard | tmp_time = 0;
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328 | f0cbd3ec | bellard | |
329 | f0cbd3ec | bellard | /* Choose the smallest of the 2 */
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330 | f0cbd3ec | bellard | if (tmp_time < timeout.tv_usec)
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331 | f0cbd3ec | bellard | timeout.tv_usec = (u_int)tmp_time; |
332 | f0cbd3ec | bellard | } |
333 | f0cbd3ec | bellard | } |
334 | f0cbd3ec | bellard | *pnfds = nfds; |
335 | f0cbd3ec | bellard | } |
336 | f0cbd3ec | bellard | |
337 | f0cbd3ec | bellard | void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds)
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338 | f0cbd3ec | bellard | { |
339 | f0cbd3ec | bellard | struct socket *so, *so_next;
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340 | f0cbd3ec | bellard | int ret;
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341 | f0cbd3ec | bellard | |
342 | f0cbd3ec | bellard | global_readfds = readfds; |
343 | f0cbd3ec | bellard | global_writefds = writefds; |
344 | f0cbd3ec | bellard | global_xfds = xfds; |
345 | f0cbd3ec | bellard | |
346 | f0cbd3ec | bellard | /* Update time */
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347 | f0cbd3ec | bellard | updtime(); |
348 | f0cbd3ec | bellard | |
349 | f0cbd3ec | bellard | /*
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350 | f0cbd3ec | bellard | * See if anything has timed out
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351 | f0cbd3ec | bellard | */
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352 | f0cbd3ec | bellard | if (link_up) {
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353 | f0cbd3ec | bellard | if (time_fasttimo && ((curtime - time_fasttimo) >= 199)) { |
354 | f0cbd3ec | bellard | tcp_fasttimo(); |
355 | f0cbd3ec | bellard | time_fasttimo = 0;
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356 | f0cbd3ec | bellard | } |
357 | f0cbd3ec | bellard | if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { |
358 | f0cbd3ec | bellard | ip_slowtimo(); |
359 | f0cbd3ec | bellard | tcp_slowtimo(); |
360 | f0cbd3ec | bellard | last_slowtimo = curtime; |
361 | f0cbd3ec | bellard | } |
362 | f0cbd3ec | bellard | } |
363 | f0cbd3ec | bellard | |
364 | f0cbd3ec | bellard | /*
|
365 | f0cbd3ec | bellard | * Check sockets
|
366 | f0cbd3ec | bellard | */
|
367 | f0cbd3ec | bellard | if (link_up) {
|
368 | f0cbd3ec | bellard | /*
|
369 | f0cbd3ec | bellard | * Check TCP sockets
|
370 | f0cbd3ec | bellard | */
|
371 | f0cbd3ec | bellard | for (so = tcb.so_next; so != &tcb; so = so_next) {
|
372 | f0cbd3ec | bellard | so_next = so->so_next; |
373 | f0cbd3ec | bellard | |
374 | f0cbd3ec | bellard | /*
|
375 | f0cbd3ec | bellard | * FD_ISSET is meaningless on these sockets
|
376 | f0cbd3ec | bellard | * (and they can crash the program)
|
377 | f0cbd3ec | bellard | */
|
378 | f0cbd3ec | bellard | if (so->so_state & SS_NOFDREF || so->s == -1) |
379 | f0cbd3ec | bellard | continue;
|
380 | f0cbd3ec | bellard | |
381 | f0cbd3ec | bellard | /*
|
382 | f0cbd3ec | bellard | * Check for URG data
|
383 | f0cbd3ec | bellard | * This will soread as well, so no need to
|
384 | f0cbd3ec | bellard | * test for readfds below if this succeeds
|
385 | f0cbd3ec | bellard | */
|
386 | f0cbd3ec | bellard | if (FD_ISSET(so->s, xfds))
|
387 | f0cbd3ec | bellard | sorecvoob(so); |
388 | f0cbd3ec | bellard | /*
|
389 | f0cbd3ec | bellard | * Check sockets for reading
|
390 | f0cbd3ec | bellard | */
|
391 | f0cbd3ec | bellard | else if (FD_ISSET(so->s, readfds)) { |
392 | f0cbd3ec | bellard | /*
|
393 | f0cbd3ec | bellard | * Check for incoming connections
|
394 | f0cbd3ec | bellard | */
|
395 | f0cbd3ec | bellard | if (so->so_state & SS_FACCEPTCONN) {
|
396 | f0cbd3ec | bellard | tcp_connect(so); |
397 | f0cbd3ec | bellard | continue;
|
398 | f0cbd3ec | bellard | } /* else */
|
399 | f0cbd3ec | bellard | ret = soread(so); |
400 | f0cbd3ec | bellard | |
401 | f0cbd3ec | bellard | /* Output it if we read something */
|
402 | f0cbd3ec | bellard | if (ret > 0) |
403 | f0cbd3ec | bellard | tcp_output(sototcpcb(so)); |
404 | f0cbd3ec | bellard | } |
405 | f0cbd3ec | bellard | |
406 | f0cbd3ec | bellard | /*
|
407 | f0cbd3ec | bellard | * Check sockets for writing
|
408 | f0cbd3ec | bellard | */
|
409 | f0cbd3ec | bellard | if (FD_ISSET(so->s, writefds)) {
|
410 | f0cbd3ec | bellard | /*
|
411 | f0cbd3ec | bellard | * Check for non-blocking, still-connecting sockets
|
412 | f0cbd3ec | bellard | */
|
413 | f0cbd3ec | bellard | if (so->so_state & SS_ISFCONNECTING) {
|
414 | f0cbd3ec | bellard | /* Connected */
|
415 | f0cbd3ec | bellard | so->so_state &= ~SS_ISFCONNECTING; |
416 | f0cbd3ec | bellard | |
417 | 02d2c54c | bellard | ret = send(so->s, &ret, 0, 0); |
418 | f0cbd3ec | bellard | if (ret < 0) { |
419 | f0cbd3ec | bellard | /* XXXXX Must fix, zero bytes is a NOP */
|
420 | f0cbd3ec | bellard | if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
421 | f0cbd3ec | bellard | errno == EINPROGRESS || errno == ENOTCONN) |
422 | f0cbd3ec | bellard | continue;
|
423 | f0cbd3ec | bellard | |
424 | f0cbd3ec | bellard | /* else failed */
|
425 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
426 | f0cbd3ec | bellard | } |
427 | f0cbd3ec | bellard | /* else so->so_state &= ~SS_ISFCONNECTING; */
|
428 | f0cbd3ec | bellard | |
429 | f0cbd3ec | bellard | /*
|
430 | f0cbd3ec | bellard | * Continue tcp_input
|
431 | f0cbd3ec | bellard | */
|
432 | f0cbd3ec | bellard | tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); |
433 | f0cbd3ec | bellard | /* continue; */
|
434 | f0cbd3ec | bellard | } else
|
435 | f0cbd3ec | bellard | ret = sowrite(so); |
436 | f0cbd3ec | bellard | /*
|
437 | f0cbd3ec | bellard | * XXXXX If we wrote something (a lot), there
|
438 | f0cbd3ec | bellard | * could be a need for a window update.
|
439 | f0cbd3ec | bellard | * In the worst case, the remote will send
|
440 | f0cbd3ec | bellard | * a window probe to get things going again
|
441 | f0cbd3ec | bellard | */
|
442 | f0cbd3ec | bellard | } |
443 | f0cbd3ec | bellard | |
444 | f0cbd3ec | bellard | /*
|
445 | f0cbd3ec | bellard | * Probe a still-connecting, non-blocking socket
|
446 | f0cbd3ec | bellard | * to check if it's still alive
|
447 | f0cbd3ec | bellard | */
|
448 | f0cbd3ec | bellard | #ifdef PROBE_CONN
|
449 | f0cbd3ec | bellard | if (so->so_state & SS_ISFCONNECTING) {
|
450 | 02d2c54c | bellard | ret = recv(so->s, (char *)&ret, 0,0); |
451 | f0cbd3ec | bellard | |
452 | f0cbd3ec | bellard | if (ret < 0) { |
453 | f0cbd3ec | bellard | /* XXX */
|
454 | f0cbd3ec | bellard | if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
455 | f0cbd3ec | bellard | errno == EINPROGRESS || errno == ENOTCONN) |
456 | f0cbd3ec | bellard | continue; /* Still connecting, continue */ |
457 | f0cbd3ec | bellard | |
458 | f0cbd3ec | bellard | /* else failed */
|
459 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
460 | f0cbd3ec | bellard | |
461 | f0cbd3ec | bellard | /* tcp_input will take care of it */
|
462 | f0cbd3ec | bellard | } else {
|
463 | 02d2c54c | bellard | ret = send(so->s, &ret, 0,0); |
464 | f0cbd3ec | bellard | if (ret < 0) { |
465 | f0cbd3ec | bellard | /* XXX */
|
466 | f0cbd3ec | bellard | if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
467 | f0cbd3ec | bellard | errno == EINPROGRESS || errno == ENOTCONN) |
468 | f0cbd3ec | bellard | continue;
|
469 | f0cbd3ec | bellard | /* else failed */
|
470 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
471 | f0cbd3ec | bellard | } else
|
472 | f0cbd3ec | bellard | so->so_state &= ~SS_ISFCONNECTING; |
473 | f0cbd3ec | bellard | |
474 | f0cbd3ec | bellard | } |
475 | f0cbd3ec | bellard | tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); |
476 | f0cbd3ec | bellard | } /* SS_ISFCONNECTING */
|
477 | f0cbd3ec | bellard | #endif
|
478 | f0cbd3ec | bellard | } |
479 | f0cbd3ec | bellard | |
480 | f0cbd3ec | bellard | /*
|
481 | f0cbd3ec | bellard | * Now UDP sockets.
|
482 | f0cbd3ec | bellard | * Incoming packets are sent straight away, they're not buffered.
|
483 | f0cbd3ec | bellard | * Incoming UDP data isn't buffered either.
|
484 | f0cbd3ec | bellard | */
|
485 | f0cbd3ec | bellard | for (so = udb.so_next; so != &udb; so = so_next) {
|
486 | f0cbd3ec | bellard | so_next = so->so_next; |
487 | f0cbd3ec | bellard | |
488 | f0cbd3ec | bellard | if (so->s != -1 && FD_ISSET(so->s, readfds)) { |
489 | f0cbd3ec | bellard | sorecvfrom(so); |
490 | f0cbd3ec | bellard | } |
491 | f0cbd3ec | bellard | } |
492 | f0cbd3ec | bellard | } |
493 | f0cbd3ec | bellard | |
494 | f0cbd3ec | bellard | /*
|
495 | f0cbd3ec | bellard | * See if we can start outputting
|
496 | f0cbd3ec | bellard | */
|
497 | f0cbd3ec | bellard | if (if_queued && link_up)
|
498 | f0cbd3ec | bellard | if_start(); |
499 | 02d2c54c | bellard | |
500 | 02d2c54c | bellard | /* clear global file descriptor sets.
|
501 | 02d2c54c | bellard | * these reside on the stack in vl.c
|
502 | 02d2c54c | bellard | * so they're unusable if we're not in
|
503 | 02d2c54c | bellard | * slirp_select_fill or slirp_select_poll.
|
504 | 02d2c54c | bellard | */
|
505 | 02d2c54c | bellard | global_readfds = NULL;
|
506 | 02d2c54c | bellard | global_writefds = NULL;
|
507 | 02d2c54c | bellard | global_xfds = NULL;
|
508 | f0cbd3ec | bellard | } |
509 | f0cbd3ec | bellard | |
510 | f0cbd3ec | bellard | #define ETH_ALEN 6 |
511 | f0cbd3ec | bellard | #define ETH_HLEN 14 |
512 | f0cbd3ec | bellard | |
513 | f0cbd3ec | bellard | #define ETH_P_IP 0x0800 /* Internet Protocol packet */ |
514 | f0cbd3ec | bellard | #define ETH_P_ARP 0x0806 /* Address Resolution packet */ |
515 | f0cbd3ec | bellard | |
516 | f0cbd3ec | bellard | #define ARPOP_REQUEST 1 /* ARP request */ |
517 | f0cbd3ec | bellard | #define ARPOP_REPLY 2 /* ARP reply */ |
518 | f0cbd3ec | bellard | |
519 | f0cbd3ec | bellard | struct ethhdr
|
520 | f0cbd3ec | bellard | { |
521 | f0cbd3ec | bellard | unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ |
522 | f0cbd3ec | bellard | unsigned char h_source[ETH_ALEN]; /* source ether addr */ |
523 | f0cbd3ec | bellard | unsigned short h_proto; /* packet type ID field */ |
524 | f0cbd3ec | bellard | }; |
525 | f0cbd3ec | bellard | |
526 | f0cbd3ec | bellard | struct arphdr
|
527 | f0cbd3ec | bellard | { |
528 | f0cbd3ec | bellard | unsigned short ar_hrd; /* format of hardware address */ |
529 | f0cbd3ec | bellard | unsigned short ar_pro; /* format of protocol address */ |
530 | f0cbd3ec | bellard | unsigned char ar_hln; /* length of hardware address */ |
531 | f0cbd3ec | bellard | unsigned char ar_pln; /* length of protocol address */ |
532 | f0cbd3ec | bellard | unsigned short ar_op; /* ARP opcode (command) */ |
533 | f0cbd3ec | bellard | |
534 | f0cbd3ec | bellard | /*
|
535 | f0cbd3ec | bellard | * Ethernet looks like this : This bit is variable sized however...
|
536 | f0cbd3ec | bellard | */
|
537 | f0cbd3ec | bellard | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ |
538 | f0cbd3ec | bellard | unsigned char ar_sip[4]; /* sender IP address */ |
539 | f0cbd3ec | bellard | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ |
540 | f0cbd3ec | bellard | unsigned char ar_tip[4]; /* target IP address */ |
541 | f0cbd3ec | bellard | }; |
542 | f0cbd3ec | bellard | |
543 | f0cbd3ec | bellard | void arp_input(const uint8_t *pkt, int pkt_len) |
544 | f0cbd3ec | bellard | { |
545 | f0cbd3ec | bellard | struct ethhdr *eh = (struct ethhdr *)pkt; |
546 | f0cbd3ec | bellard | struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); |
547 | f0cbd3ec | bellard | uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)]; |
548 | f0cbd3ec | bellard | struct ethhdr *reh = (struct ethhdr *)arp_reply; |
549 | f0cbd3ec | bellard | struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); |
550 | f0cbd3ec | bellard | int ar_op;
|
551 | a3d4af03 | bellard | struct ex_list *ex_ptr;
|
552 | f0cbd3ec | bellard | |
553 | f0cbd3ec | bellard | ar_op = ntohs(ah->ar_op); |
554 | f0cbd3ec | bellard | switch(ar_op) {
|
555 | f0cbd3ec | bellard | case ARPOP_REQUEST:
|
556 | a3d4af03 | bellard | if (!memcmp(ah->ar_tip, &special_addr, 3)) { |
557 | a3d4af03 | bellard | if (ah->ar_tip[3] == CTL_DNS || ah->ar_tip[3] == CTL_ALIAS) |
558 | a3d4af03 | bellard | goto arp_ok;
|
559 | a3d4af03 | bellard | for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
560 | a3d4af03 | bellard | if (ex_ptr->ex_addr == ah->ar_tip[3]) |
561 | a3d4af03 | bellard | goto arp_ok;
|
562 | a3d4af03 | bellard | } |
563 | a3d4af03 | bellard | return;
|
564 | a3d4af03 | bellard | arp_ok:
|
565 | f0cbd3ec | bellard | /* XXX: make an ARP request to have the client address */
|
566 | f0cbd3ec | bellard | memcpy(client_ethaddr, eh->h_source, ETH_ALEN); |
567 | f0cbd3ec | bellard | |
568 | f0cbd3ec | bellard | /* ARP request for alias/dns mac address */
|
569 | f0cbd3ec | bellard | memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); |
570 | f0cbd3ec | bellard | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1);
|
571 | f0cbd3ec | bellard | reh->h_source[5] = ah->ar_tip[3]; |
572 | f0cbd3ec | bellard | reh->h_proto = htons(ETH_P_ARP); |
573 | f0cbd3ec | bellard | |
574 | f0cbd3ec | bellard | rah->ar_hrd = htons(1);
|
575 | f0cbd3ec | bellard | rah->ar_pro = htons(ETH_P_IP); |
576 | f0cbd3ec | bellard | rah->ar_hln = ETH_ALEN; |
577 | f0cbd3ec | bellard | rah->ar_pln = 4;
|
578 | f0cbd3ec | bellard | rah->ar_op = htons(ARPOP_REPLY); |
579 | f0cbd3ec | bellard | memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); |
580 | f0cbd3ec | bellard | memcpy(rah->ar_sip, ah->ar_tip, 4);
|
581 | f0cbd3ec | bellard | memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); |
582 | f0cbd3ec | bellard | memcpy(rah->ar_tip, ah->ar_sip, 4);
|
583 | f0cbd3ec | bellard | slirp_output(arp_reply, sizeof(arp_reply));
|
584 | f0cbd3ec | bellard | } |
585 | f0cbd3ec | bellard | break;
|
586 | f0cbd3ec | bellard | default:
|
587 | f0cbd3ec | bellard | break;
|
588 | f0cbd3ec | bellard | } |
589 | f0cbd3ec | bellard | } |
590 | f0cbd3ec | bellard | |
591 | f0cbd3ec | bellard | void slirp_input(const uint8_t *pkt, int pkt_len) |
592 | f0cbd3ec | bellard | { |
593 | f0cbd3ec | bellard | struct mbuf *m;
|
594 | f0cbd3ec | bellard | int proto;
|
595 | f0cbd3ec | bellard | |
596 | f0cbd3ec | bellard | if (pkt_len < ETH_HLEN)
|
597 | f0cbd3ec | bellard | return;
|
598 | f0cbd3ec | bellard | |
599 | f0cbd3ec | bellard | proto = ntohs(*(uint16_t *)(pkt + 12));
|
600 | f0cbd3ec | bellard | switch(proto) {
|
601 | f0cbd3ec | bellard | case ETH_P_ARP:
|
602 | f0cbd3ec | bellard | arp_input(pkt, pkt_len); |
603 | f0cbd3ec | bellard | break;
|
604 | f0cbd3ec | bellard | case ETH_P_IP:
|
605 | f0cbd3ec | bellard | m = m_get(); |
606 | f0cbd3ec | bellard | if (!m)
|
607 | f0cbd3ec | bellard | return;
|
608 | f0cbd3ec | bellard | m->m_len = pkt_len; |
609 | f0cbd3ec | bellard | memcpy(m->m_data, pkt, pkt_len); |
610 | f0cbd3ec | bellard | |
611 | f0cbd3ec | bellard | m->m_data += ETH_HLEN; |
612 | f0cbd3ec | bellard | m->m_len -= ETH_HLEN; |
613 | f0cbd3ec | bellard | |
614 | f0cbd3ec | bellard | ip_input(m); |
615 | f0cbd3ec | bellard | break;
|
616 | f0cbd3ec | bellard | default:
|
617 | f0cbd3ec | bellard | break;
|
618 | f0cbd3ec | bellard | } |
619 | f0cbd3ec | bellard | } |
620 | f0cbd3ec | bellard | |
621 | f0cbd3ec | bellard | /* output the IP packet to the ethernet device */
|
622 | f0cbd3ec | bellard | void if_encap(const uint8_t *ip_data, int ip_data_len) |
623 | f0cbd3ec | bellard | { |
624 | f0cbd3ec | bellard | uint8_t buf[1600];
|
625 | f0cbd3ec | bellard | struct ethhdr *eh = (struct ethhdr *)buf; |
626 | f0cbd3ec | bellard | |
627 | f0cbd3ec | bellard | if (ip_data_len + ETH_HLEN > sizeof(buf)) |
628 | f0cbd3ec | bellard | return;
|
629 | f0cbd3ec | bellard | |
630 | f0cbd3ec | bellard | memcpy(eh->h_dest, client_ethaddr, ETH_ALEN); |
631 | f0cbd3ec | bellard | memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
|
632 | a3d4af03 | bellard | /* XXX: not correct */
|
633 | f0cbd3ec | bellard | eh->h_source[5] = CTL_ALIAS;
|
634 | f0cbd3ec | bellard | eh->h_proto = htons(ETH_P_IP); |
635 | f0cbd3ec | bellard | memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len); |
636 | f0cbd3ec | bellard | slirp_output(buf, ip_data_len + ETH_HLEN); |
637 | f0cbd3ec | bellard | } |
638 | 9bf05444 | bellard | |
639 | 9bf05444 | bellard | int slirp_redir(int is_udp, int host_port, |
640 | 9bf05444 | bellard | struct in_addr guest_addr, int guest_port) |
641 | 9bf05444 | bellard | { |
642 | 9bf05444 | bellard | if (is_udp) {
|
643 | 9bf05444 | bellard | if (!udp_listen(htons(host_port), guest_addr.s_addr,
|
644 | 9bf05444 | bellard | htons(guest_port), 0))
|
645 | 9bf05444 | bellard | return -1; |
646 | 9bf05444 | bellard | } else {
|
647 | 9bf05444 | bellard | if (!solisten(htons(host_port), guest_addr.s_addr,
|
648 | 9bf05444 | bellard | htons(guest_port), 0))
|
649 | 9bf05444 | bellard | return -1; |
650 | 9bf05444 | bellard | } |
651 | 9bf05444 | bellard | return 0; |
652 | 9bf05444 | bellard | } |
653 | a3d4af03 | bellard | |
654 | a3d4af03 | bellard | int slirp_add_exec(int do_pty, const char *args, int addr_low_byte, |
655 | a3d4af03 | bellard | int guest_port)
|
656 | a3d4af03 | bellard | { |
657 | a3d4af03 | bellard | return add_exec(&exec_list, do_pty, (char *)args, |
658 | a3d4af03 | bellard | addr_low_byte, htons(guest_port)); |
659 | a3d4af03 | bellard | } |