root / slirp / slirp.c @ 17c275d9
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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 | 8dbca8dd | bellard | /* virtual address alias for host */
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13 | 8dbca8dd | bellard | struct in_addr alias_addr;
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14 | f0cbd3ec | bellard | |
15 | f0cbd3ec | bellard | const uint8_t special_ethaddr[6] = { |
16 | f0cbd3ec | bellard | 0x52, 0x54, 0x00, 0x12, 0x35, 0x00 |
17 | f0cbd3ec | bellard | }; |
18 | f0cbd3ec | bellard | |
19 | f0cbd3ec | bellard | uint8_t client_ethaddr[6];
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20 | f0cbd3ec | bellard | |
21 | f0cbd3ec | bellard | int do_slowtimo;
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22 | f0cbd3ec | bellard | int link_up;
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23 | f0cbd3ec | bellard | struct timeval tt;
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24 | f0cbd3ec | bellard | FILE *lfd; |
25 | a3d4af03 | bellard | struct ex_list *exec_list;
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26 | f0cbd3ec | bellard | |
27 | f0cbd3ec | bellard | /* XXX: suppress those select globals */
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28 | f0cbd3ec | bellard | fd_set *global_readfds, *global_writefds, *global_xfds; |
29 | f0cbd3ec | bellard | |
30 | 3f423c9c | bellard | char slirp_hostname[33]; |
31 | 115defd1 | pbrook | |
32 | f0cbd3ec | bellard | #ifdef _WIN32
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33 | f0cbd3ec | bellard | |
34 | f0cbd3ec | bellard | static int get_dns_addr(struct in_addr *pdns_addr) |
35 | f0cbd3ec | bellard | { |
36 | 379ff53d | bellard | FIXED_INFO *FixedInfo=NULL;
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37 | 379ff53d | bellard | ULONG BufLen; |
38 | 379ff53d | bellard | DWORD ret; |
39 | 379ff53d | bellard | IP_ADDR_STRING *pIPAddr; |
40 | 379ff53d | bellard | struct in_addr tmp_addr;
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41 | 379ff53d | bellard | |
42 | 379ff53d | bellard | FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
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43 | 379ff53d | bellard | BufLen = sizeof(FIXED_INFO);
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44 | 379ff53d | bellard | |
45 | 379ff53d | bellard | if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) {
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46 | 379ff53d | bellard | if (FixedInfo) {
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47 | 379ff53d | bellard | GlobalFree(FixedInfo); |
48 | 379ff53d | bellard | FixedInfo = NULL;
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49 | 379ff53d | bellard | } |
50 | 379ff53d | bellard | FixedInfo = GlobalAlloc(GPTR, BufLen); |
51 | 379ff53d | bellard | } |
52 | 379ff53d | bellard | |
53 | 379ff53d | bellard | if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) {
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54 | 379ff53d | bellard | printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret );
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55 | 379ff53d | bellard | if (FixedInfo) {
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56 | 379ff53d | bellard | GlobalFree(FixedInfo); |
57 | 379ff53d | bellard | FixedInfo = NULL;
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58 | 379ff53d | bellard | } |
59 | 379ff53d | bellard | return -1; |
60 | 379ff53d | bellard | } |
61 | 379ff53d | bellard | |
62 | 379ff53d | bellard | pIPAddr = &(FixedInfo->DnsServerList); |
63 | 379ff53d | bellard | inet_aton(pIPAddr->IpAddress.String, &tmp_addr); |
64 | 379ff53d | bellard | *pdns_addr = tmp_addr; |
65 | 379ff53d | bellard | #if 0
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66 | 379ff53d | bellard | printf( "DNS Servers:\n" );
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67 | 379ff53d | bellard | printf( "DNS Addr:%s\n", pIPAddr->IpAddress.String );
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68 | 379ff53d | bellard |
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69 | 379ff53d | bellard | pIPAddr = FixedInfo -> DnsServerList.Next;
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70 | 379ff53d | bellard | while ( pIPAddr ) {
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71 | 379ff53d | bellard | printf( "DNS Addr:%s\n", pIPAddr ->IpAddress.String );
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72 | 379ff53d | bellard | pIPAddr = pIPAddr ->Next;
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73 | 379ff53d | bellard | }
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74 | 379ff53d | bellard | #endif
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75 | 379ff53d | bellard | if (FixedInfo) {
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76 | 379ff53d | bellard | GlobalFree(FixedInfo); |
77 | 379ff53d | bellard | FixedInfo = NULL;
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78 | 379ff53d | bellard | } |
79 | 379ff53d | bellard | return 0; |
80 | f0cbd3ec | bellard | } |
81 | f0cbd3ec | bellard | |
82 | f0cbd3ec | bellard | #else
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83 | f0cbd3ec | bellard | |
84 | f0cbd3ec | bellard | static int get_dns_addr(struct in_addr *pdns_addr) |
85 | f0cbd3ec | bellard | { |
86 | f0cbd3ec | bellard | char buff[512]; |
87 | f0cbd3ec | bellard | char buff2[256]; |
88 | f0cbd3ec | bellard | FILE *f; |
89 | f0cbd3ec | bellard | int found = 0; |
90 | f0cbd3ec | bellard | struct in_addr tmp_addr;
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91 | f0cbd3ec | bellard | |
92 | f0cbd3ec | bellard | f = fopen("/etc/resolv.conf", "r"); |
93 | f0cbd3ec | bellard | if (!f)
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94 | f0cbd3ec | bellard | return -1; |
95 | f0cbd3ec | bellard | |
96 | f0cbd3ec | bellard | lprint("IP address of your DNS(s): ");
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97 | f0cbd3ec | bellard | while (fgets(buff, 512, f) != NULL) { |
98 | f0cbd3ec | bellard | if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) { |
99 | f0cbd3ec | bellard | if (!inet_aton(buff2, &tmp_addr))
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100 | f0cbd3ec | bellard | continue;
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101 | f0cbd3ec | bellard | if (tmp_addr.s_addr == loopback_addr.s_addr)
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102 | f0cbd3ec | bellard | tmp_addr = our_addr; |
103 | f0cbd3ec | bellard | /* If it's the first one, set it to dns_addr */
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104 | f0cbd3ec | bellard | if (!found)
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105 | f0cbd3ec | bellard | *pdns_addr = tmp_addr; |
106 | f0cbd3ec | bellard | else
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107 | f0cbd3ec | bellard | lprint(", ");
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108 | f0cbd3ec | bellard | if (++found > 3) { |
109 | f0cbd3ec | bellard | lprint("(more)");
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110 | f0cbd3ec | bellard | break;
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111 | f0cbd3ec | bellard | } else
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112 | f0cbd3ec | bellard | lprint("%s", inet_ntoa(tmp_addr));
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113 | f0cbd3ec | bellard | } |
114 | f0cbd3ec | bellard | } |
115 | 1d43a717 | bellard | fclose(f); |
116 | f0cbd3ec | bellard | if (!found)
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117 | f0cbd3ec | bellard | return -1; |
118 | f0cbd3ec | bellard | return 0; |
119 | f0cbd3ec | bellard | } |
120 | f0cbd3ec | bellard | |
121 | f0cbd3ec | bellard | #endif
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122 | f0cbd3ec | bellard | |
123 | 379ff53d | bellard | #ifdef _WIN32
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124 | 379ff53d | bellard | void slirp_cleanup(void) |
125 | 379ff53d | bellard | { |
126 | 379ff53d | bellard | WSACleanup(); |
127 | 379ff53d | bellard | } |
128 | 379ff53d | bellard | #endif
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129 | 379ff53d | bellard | |
130 | f0cbd3ec | bellard | void slirp_init(void) |
131 | f0cbd3ec | bellard | { |
132 | 512176db | bellard | // debug_init("/tmp/slirp.log", DEBUG_DEFAULT);
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133 | 1d43a717 | bellard | |
134 | 379ff53d | bellard | #ifdef _WIN32
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135 | 379ff53d | bellard | { |
136 | 379ff53d | bellard | WSADATA Data; |
137 | 379ff53d | bellard | WSAStartup(MAKEWORD(2,0), &Data); |
138 | 379ff53d | bellard | atexit(slirp_cleanup); |
139 | 379ff53d | bellard | } |
140 | 379ff53d | bellard | #endif
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141 | 379ff53d | bellard | |
142 | f0cbd3ec | bellard | link_up = 1;
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143 | f0cbd3ec | bellard | |
144 | f0cbd3ec | bellard | if_init(); |
145 | f0cbd3ec | bellard | ip_init(); |
146 | f0cbd3ec | bellard | |
147 | f0cbd3ec | bellard | /* Initialise mbufs *after* setting the MTU */
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148 | f0cbd3ec | bellard | m_init(); |
149 | f0cbd3ec | bellard | |
150 | f0cbd3ec | bellard | /* set default addresses */
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151 | f0cbd3ec | bellard | inet_aton("127.0.0.1", &loopback_addr);
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152 | f0cbd3ec | bellard | |
153 | f0cbd3ec | bellard | if (get_dns_addr(&dns_addr) < 0) { |
154 | 0f8134bf | pbrook | dns_addr = loopback_addr; |
155 | 0f8134bf | pbrook | fprintf (stderr, "Warning: No DNS servers found\n");
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156 | f0cbd3ec | bellard | } |
157 | f0cbd3ec | bellard | |
158 | f0cbd3ec | bellard | inet_aton(CTL_SPECIAL, &special_addr); |
159 | 8dbca8dd | bellard | alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS); |
160 | f4e15b4b | pbrook | getouraddr(); |
161 | f0cbd3ec | bellard | } |
162 | f0cbd3ec | bellard | |
163 | f0cbd3ec | bellard | #define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
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164 | f0cbd3ec | bellard | #define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
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165 | f0cbd3ec | bellard | #define UPD_NFDS(x) if (nfds < (x)) nfds = (x) |
166 | f0cbd3ec | bellard | |
167 | f0cbd3ec | bellard | /*
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168 | f0cbd3ec | bellard | * curtime kept to an accuracy of 1ms
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169 | f0cbd3ec | bellard | */
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170 | 379ff53d | bellard | #ifdef _WIN32
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171 | 379ff53d | bellard | static void updtime(void) |
172 | 379ff53d | bellard | { |
173 | 379ff53d | bellard | struct _timeb tb;
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174 | 379ff53d | bellard | |
175 | 379ff53d | bellard | _ftime(&tb); |
176 | 379ff53d | bellard | curtime = (u_int)tb.time * (u_int)1000;
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177 | 379ff53d | bellard | curtime += (u_int)tb.millitm; |
178 | 379ff53d | bellard | } |
179 | 379ff53d | bellard | #else
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180 | f0cbd3ec | bellard | static void updtime(void) |
181 | f0cbd3ec | bellard | { |
182 | f0cbd3ec | bellard | gettimeofday(&tt, 0);
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183 | f0cbd3ec | bellard | |
184 | f0cbd3ec | bellard | curtime = (u_int)tt.tv_sec * (u_int)1000;
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185 | f0cbd3ec | bellard | curtime += (u_int)tt.tv_usec / (u_int)1000;
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186 | f0cbd3ec | bellard | |
187 | f0cbd3ec | bellard | if ((tt.tv_usec % 1000) >= 500) |
188 | f0cbd3ec | bellard | curtime++; |
189 | f0cbd3ec | bellard | } |
190 | 379ff53d | bellard | #endif
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191 | f0cbd3ec | bellard | |
192 | f0cbd3ec | bellard | void slirp_select_fill(int *pnfds, |
193 | f0cbd3ec | bellard | fd_set *readfds, fd_set *writefds, fd_set *xfds) |
194 | f0cbd3ec | bellard | { |
195 | f0cbd3ec | bellard | struct socket *so, *so_next;
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196 | f0cbd3ec | bellard | struct timeval timeout;
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197 | f0cbd3ec | bellard | int nfds;
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198 | f0cbd3ec | bellard | int tmp_time;
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199 | f0cbd3ec | bellard | |
200 | f0cbd3ec | bellard | /* fail safe */
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201 | f0cbd3ec | bellard | global_readfds = NULL;
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202 | f0cbd3ec | bellard | global_writefds = NULL;
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203 | f0cbd3ec | bellard | global_xfds = NULL;
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204 | f0cbd3ec | bellard | |
205 | f0cbd3ec | bellard | nfds = *pnfds; |
206 | f0cbd3ec | bellard | /*
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207 | f0cbd3ec | bellard | * First, TCP sockets
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208 | f0cbd3ec | bellard | */
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209 | f0cbd3ec | bellard | do_slowtimo = 0;
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210 | f0cbd3ec | bellard | if (link_up) {
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211 | f0cbd3ec | bellard | /*
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212 | f0cbd3ec | bellard | * *_slowtimo needs calling if there are IP fragments
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213 | f0cbd3ec | bellard | * in the fragment queue, or there are TCP connections active
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214 | f0cbd3ec | bellard | */
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215 | f0cbd3ec | bellard | do_slowtimo = ((tcb.so_next != &tcb) || |
216 | f0cbd3ec | bellard | ((struct ipasfrag *)&ipq != (struct ipasfrag *)ipq.next)); |
217 | f0cbd3ec | bellard | |
218 | f0cbd3ec | bellard | for (so = tcb.so_next; so != &tcb; so = so_next) {
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219 | f0cbd3ec | bellard | so_next = so->so_next; |
220 | f0cbd3ec | bellard | |
221 | f0cbd3ec | bellard | /*
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222 | f0cbd3ec | bellard | * See if we need a tcp_fasttimo
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223 | f0cbd3ec | bellard | */
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224 | f0cbd3ec | bellard | if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) |
225 | f0cbd3ec | bellard | time_fasttimo = curtime; /* Flag when we want a fasttimo */
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226 | f0cbd3ec | bellard | |
227 | f0cbd3ec | bellard | /*
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228 | f0cbd3ec | bellard | * NOFDREF can include still connecting to local-host,
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229 | f0cbd3ec | bellard | * newly socreated() sockets etc. Don't want to select these.
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230 | f0cbd3ec | bellard | */
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231 | f0cbd3ec | bellard | if (so->so_state & SS_NOFDREF || so->s == -1) |
232 | f0cbd3ec | bellard | continue;
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233 | f0cbd3ec | bellard | |
234 | f0cbd3ec | bellard | /*
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235 | f0cbd3ec | bellard | * Set for reading sockets which are accepting
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236 | f0cbd3ec | bellard | */
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237 | f0cbd3ec | bellard | if (so->so_state & SS_FACCEPTCONN) {
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238 | f0cbd3ec | bellard | FD_SET(so->s, readfds); |
239 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
240 | f0cbd3ec | bellard | continue;
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241 | f0cbd3ec | bellard | } |
242 | f0cbd3ec | bellard | |
243 | f0cbd3ec | bellard | /*
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244 | f0cbd3ec | bellard | * Set for writing sockets which are connecting
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245 | f0cbd3ec | bellard | */
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246 | f0cbd3ec | bellard | if (so->so_state & SS_ISFCONNECTING) {
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247 | f0cbd3ec | bellard | FD_SET(so->s, writefds); |
248 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
249 | f0cbd3ec | bellard | continue;
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250 | f0cbd3ec | bellard | } |
251 | f0cbd3ec | bellard | |
252 | f0cbd3ec | bellard | /*
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253 | f0cbd3ec | bellard | * Set for writing if we are connected, can send more, and
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254 | f0cbd3ec | bellard | * we have something to send
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255 | f0cbd3ec | bellard | */
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256 | f0cbd3ec | bellard | if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
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257 | f0cbd3ec | bellard | FD_SET(so->s, writefds); |
258 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
259 | f0cbd3ec | bellard | } |
260 | f0cbd3ec | bellard | |
261 | f0cbd3ec | bellard | /*
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262 | f0cbd3ec | bellard | * Set for reading (and urgent data) if we are connected, can
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263 | f0cbd3ec | bellard | * receive more, and we have room for it XXX /2 ?
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264 | f0cbd3ec | bellard | */
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265 | f0cbd3ec | bellard | if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { |
266 | f0cbd3ec | bellard | FD_SET(so->s, readfds); |
267 | f0cbd3ec | bellard | FD_SET(so->s, xfds); |
268 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
269 | f0cbd3ec | bellard | } |
270 | f0cbd3ec | bellard | } |
271 | f0cbd3ec | bellard | |
272 | f0cbd3ec | bellard | /*
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273 | f0cbd3ec | bellard | * UDP sockets
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274 | f0cbd3ec | bellard | */
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275 | f0cbd3ec | bellard | for (so = udb.so_next; so != &udb; so = so_next) {
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276 | f0cbd3ec | bellard | so_next = so->so_next; |
277 | f0cbd3ec | bellard | |
278 | f0cbd3ec | bellard | /*
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279 | f0cbd3ec | bellard | * See if it's timed out
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280 | f0cbd3ec | bellard | */
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281 | f0cbd3ec | bellard | if (so->so_expire) {
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282 | f0cbd3ec | bellard | if (so->so_expire <= curtime) {
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283 | f0cbd3ec | bellard | udp_detach(so); |
284 | f0cbd3ec | bellard | continue;
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285 | f0cbd3ec | bellard | } else
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286 | f0cbd3ec | bellard | do_slowtimo = 1; /* Let socket expire */ |
287 | f0cbd3ec | bellard | } |
288 | f0cbd3ec | bellard | |
289 | f0cbd3ec | bellard | /*
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290 | f0cbd3ec | bellard | * When UDP packets are received from over the
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291 | f0cbd3ec | bellard | * link, they're sendto()'d straight away, so
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292 | f0cbd3ec | bellard | * no need for setting for writing
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293 | f0cbd3ec | bellard | * Limit the number of packets queued by this session
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294 | f0cbd3ec | bellard | * to 4. Note that even though we try and limit this
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295 | f0cbd3ec | bellard | * to 4 packets, the session could have more queued
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296 | f0cbd3ec | bellard | * if the packets needed to be fragmented
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297 | f0cbd3ec | bellard | * (XXX <= 4 ?)
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298 | f0cbd3ec | bellard | */
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299 | f0cbd3ec | bellard | if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { |
300 | f0cbd3ec | bellard | FD_SET(so->s, readfds); |
301 | f0cbd3ec | bellard | UPD_NFDS(so->s); |
302 | f0cbd3ec | bellard | } |
303 | f0cbd3ec | bellard | } |
304 | f0cbd3ec | bellard | } |
305 | f0cbd3ec | bellard | |
306 | f0cbd3ec | bellard | /*
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307 | f0cbd3ec | bellard | * Setup timeout to use minimum CPU usage, especially when idle
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308 | f0cbd3ec | bellard | */
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309 | f0cbd3ec | bellard | |
310 | f0cbd3ec | bellard | /*
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311 | f0cbd3ec | bellard | * First, see the timeout needed by *timo
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312 | f0cbd3ec | bellard | */
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313 | f0cbd3ec | bellard | timeout.tv_sec = 0;
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314 | f0cbd3ec | bellard | timeout.tv_usec = -1;
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315 | f0cbd3ec | bellard | /*
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316 | f0cbd3ec | bellard | * If a slowtimo is needed, set timeout to 500ms from the last
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317 | f0cbd3ec | bellard | * slow timeout. If a fast timeout is needed, set timeout within
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318 | f0cbd3ec | bellard | * 200ms of when it was requested.
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319 | f0cbd3ec | bellard | */
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320 | f0cbd3ec | bellard | if (do_slowtimo) {
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321 | f0cbd3ec | bellard | /* XXX + 10000 because some select()'s aren't that accurate */
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322 | f0cbd3ec | bellard | timeout.tv_usec = ((500 - (curtime - last_slowtimo)) * 1000) + 10000; |
323 | f0cbd3ec | bellard | if (timeout.tv_usec < 0) |
324 | f0cbd3ec | bellard | timeout.tv_usec = 0;
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325 | f0cbd3ec | bellard | else if (timeout.tv_usec > 510000) |
326 | f0cbd3ec | bellard | timeout.tv_usec = 510000;
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327 | f0cbd3ec | bellard | |
328 | f0cbd3ec | bellard | /* Can only fasttimo if we also slowtimo */
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329 | f0cbd3ec | bellard | if (time_fasttimo) {
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330 | f0cbd3ec | bellard | tmp_time = (200 - (curtime - time_fasttimo)) * 1000; |
331 | f0cbd3ec | bellard | if (tmp_time < 0) |
332 | f0cbd3ec | bellard | tmp_time = 0;
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333 | f0cbd3ec | bellard | |
334 | f0cbd3ec | bellard | /* Choose the smallest of the 2 */
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335 | f0cbd3ec | bellard | if (tmp_time < timeout.tv_usec)
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336 | f0cbd3ec | bellard | timeout.tv_usec = (u_int)tmp_time; |
337 | f0cbd3ec | bellard | } |
338 | f0cbd3ec | bellard | } |
339 | f0cbd3ec | bellard | *pnfds = nfds; |
340 | f0cbd3ec | bellard | } |
341 | f0cbd3ec | bellard | |
342 | f0cbd3ec | bellard | void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds)
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343 | f0cbd3ec | bellard | { |
344 | f0cbd3ec | bellard | struct socket *so, *so_next;
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345 | f0cbd3ec | bellard | int ret;
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346 | f0cbd3ec | bellard | |
347 | f0cbd3ec | bellard | global_readfds = readfds; |
348 | f0cbd3ec | bellard | global_writefds = writefds; |
349 | f0cbd3ec | bellard | global_xfds = xfds; |
350 | f0cbd3ec | bellard | |
351 | f0cbd3ec | bellard | /* Update time */
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352 | f0cbd3ec | bellard | updtime(); |
353 | f0cbd3ec | bellard | |
354 | f0cbd3ec | bellard | /*
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355 | f0cbd3ec | bellard | * See if anything has timed out
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356 | f0cbd3ec | bellard | */
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357 | f0cbd3ec | bellard | if (link_up) {
|
358 | df5f8956 | bellard | if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) { |
359 | f0cbd3ec | bellard | tcp_fasttimo(); |
360 | f0cbd3ec | bellard | time_fasttimo = 0;
|
361 | f0cbd3ec | bellard | } |
362 | f0cbd3ec | bellard | if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { |
363 | f0cbd3ec | bellard | ip_slowtimo(); |
364 | f0cbd3ec | bellard | tcp_slowtimo(); |
365 | f0cbd3ec | bellard | last_slowtimo = curtime; |
366 | f0cbd3ec | bellard | } |
367 | f0cbd3ec | bellard | } |
368 | f0cbd3ec | bellard | |
369 | f0cbd3ec | bellard | /*
|
370 | f0cbd3ec | bellard | * Check sockets
|
371 | f0cbd3ec | bellard | */
|
372 | f0cbd3ec | bellard | if (link_up) {
|
373 | f0cbd3ec | bellard | /*
|
374 | f0cbd3ec | bellard | * Check TCP sockets
|
375 | f0cbd3ec | bellard | */
|
376 | f0cbd3ec | bellard | for (so = tcb.so_next; so != &tcb; so = so_next) {
|
377 | f0cbd3ec | bellard | so_next = so->so_next; |
378 | f0cbd3ec | bellard | |
379 | f0cbd3ec | bellard | /*
|
380 | f0cbd3ec | bellard | * FD_ISSET is meaningless on these sockets
|
381 | f0cbd3ec | bellard | * (and they can crash the program)
|
382 | f0cbd3ec | bellard | */
|
383 | f0cbd3ec | bellard | if (so->so_state & SS_NOFDREF || so->s == -1) |
384 | f0cbd3ec | bellard | continue;
|
385 | f0cbd3ec | bellard | |
386 | f0cbd3ec | bellard | /*
|
387 | f0cbd3ec | bellard | * Check for URG data
|
388 | f0cbd3ec | bellard | * This will soread as well, so no need to
|
389 | f0cbd3ec | bellard | * test for readfds below if this succeeds
|
390 | f0cbd3ec | bellard | */
|
391 | f0cbd3ec | bellard | if (FD_ISSET(so->s, xfds))
|
392 | f0cbd3ec | bellard | sorecvoob(so); |
393 | f0cbd3ec | bellard | /*
|
394 | f0cbd3ec | bellard | * Check sockets for reading
|
395 | f0cbd3ec | bellard | */
|
396 | f0cbd3ec | bellard | else if (FD_ISSET(so->s, readfds)) { |
397 | f0cbd3ec | bellard | /*
|
398 | f0cbd3ec | bellard | * Check for incoming connections
|
399 | f0cbd3ec | bellard | */
|
400 | f0cbd3ec | bellard | if (so->so_state & SS_FACCEPTCONN) {
|
401 | f0cbd3ec | bellard | tcp_connect(so); |
402 | f0cbd3ec | bellard | continue;
|
403 | f0cbd3ec | bellard | } /* else */
|
404 | f0cbd3ec | bellard | ret = soread(so); |
405 | f0cbd3ec | bellard | |
406 | f0cbd3ec | bellard | /* Output it if we read something */
|
407 | f0cbd3ec | bellard | if (ret > 0) |
408 | f0cbd3ec | bellard | tcp_output(sototcpcb(so)); |
409 | f0cbd3ec | bellard | } |
410 | f0cbd3ec | bellard | |
411 | f0cbd3ec | bellard | /*
|
412 | f0cbd3ec | bellard | * Check sockets for writing
|
413 | f0cbd3ec | bellard | */
|
414 | f0cbd3ec | bellard | if (FD_ISSET(so->s, writefds)) {
|
415 | f0cbd3ec | bellard | /*
|
416 | f0cbd3ec | bellard | * Check for non-blocking, still-connecting sockets
|
417 | f0cbd3ec | bellard | */
|
418 | f0cbd3ec | bellard | if (so->so_state & SS_ISFCONNECTING) {
|
419 | f0cbd3ec | bellard | /* Connected */
|
420 | f0cbd3ec | bellard | so->so_state &= ~SS_ISFCONNECTING; |
421 | f0cbd3ec | bellard | |
422 | 02d2c54c | bellard | ret = send(so->s, &ret, 0, 0); |
423 | f0cbd3ec | bellard | if (ret < 0) { |
424 | f0cbd3ec | bellard | /* XXXXX Must fix, zero bytes is a NOP */
|
425 | f0cbd3ec | bellard | if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
426 | f0cbd3ec | bellard | errno == EINPROGRESS || errno == ENOTCONN) |
427 | f0cbd3ec | bellard | continue;
|
428 | f0cbd3ec | bellard | |
429 | f0cbd3ec | bellard | /* else failed */
|
430 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
431 | f0cbd3ec | bellard | } |
432 | f0cbd3ec | bellard | /* else so->so_state &= ~SS_ISFCONNECTING; */
|
433 | f0cbd3ec | bellard | |
434 | f0cbd3ec | bellard | /*
|
435 | f0cbd3ec | bellard | * Continue tcp_input
|
436 | f0cbd3ec | bellard | */
|
437 | f0cbd3ec | bellard | tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); |
438 | f0cbd3ec | bellard | /* continue; */
|
439 | f0cbd3ec | bellard | } else
|
440 | f0cbd3ec | bellard | ret = sowrite(so); |
441 | f0cbd3ec | bellard | /*
|
442 | f0cbd3ec | bellard | * XXXXX If we wrote something (a lot), there
|
443 | f0cbd3ec | bellard | * could be a need for a window update.
|
444 | f0cbd3ec | bellard | * In the worst case, the remote will send
|
445 | f0cbd3ec | bellard | * a window probe to get things going again
|
446 | f0cbd3ec | bellard | */
|
447 | f0cbd3ec | bellard | } |
448 | f0cbd3ec | bellard | |
449 | f0cbd3ec | bellard | /*
|
450 | f0cbd3ec | bellard | * Probe a still-connecting, non-blocking socket
|
451 | f0cbd3ec | bellard | * to check if it's still alive
|
452 | f0cbd3ec | bellard | */
|
453 | f0cbd3ec | bellard | #ifdef PROBE_CONN
|
454 | f0cbd3ec | bellard | if (so->so_state & SS_ISFCONNECTING) {
|
455 | 02d2c54c | bellard | ret = recv(so->s, (char *)&ret, 0,0); |
456 | f0cbd3ec | bellard | |
457 | f0cbd3ec | bellard | if (ret < 0) { |
458 | f0cbd3ec | bellard | /* XXX */
|
459 | f0cbd3ec | bellard | if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
460 | f0cbd3ec | bellard | errno == EINPROGRESS || errno == ENOTCONN) |
461 | f0cbd3ec | bellard | continue; /* Still connecting, continue */ |
462 | f0cbd3ec | bellard | |
463 | f0cbd3ec | bellard | /* else failed */
|
464 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
465 | f0cbd3ec | bellard | |
466 | f0cbd3ec | bellard | /* tcp_input will take care of it */
|
467 | f0cbd3ec | bellard | } else {
|
468 | 02d2c54c | bellard | ret = send(so->s, &ret, 0,0); |
469 | f0cbd3ec | bellard | if (ret < 0) { |
470 | f0cbd3ec | bellard | /* XXX */
|
471 | f0cbd3ec | bellard | if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
472 | f0cbd3ec | bellard | errno == EINPROGRESS || errno == ENOTCONN) |
473 | f0cbd3ec | bellard | continue;
|
474 | f0cbd3ec | bellard | /* else failed */
|
475 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
476 | f0cbd3ec | bellard | } else
|
477 | f0cbd3ec | bellard | so->so_state &= ~SS_ISFCONNECTING; |
478 | f0cbd3ec | bellard | |
479 | f0cbd3ec | bellard | } |
480 | f0cbd3ec | bellard | tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); |
481 | f0cbd3ec | bellard | } /* SS_ISFCONNECTING */
|
482 | f0cbd3ec | bellard | #endif
|
483 | f0cbd3ec | bellard | } |
484 | f0cbd3ec | bellard | |
485 | f0cbd3ec | bellard | /*
|
486 | f0cbd3ec | bellard | * Now UDP sockets.
|
487 | f0cbd3ec | bellard | * Incoming packets are sent straight away, they're not buffered.
|
488 | f0cbd3ec | bellard | * Incoming UDP data isn't buffered either.
|
489 | f0cbd3ec | bellard | */
|
490 | f0cbd3ec | bellard | for (so = udb.so_next; so != &udb; so = so_next) {
|
491 | f0cbd3ec | bellard | so_next = so->so_next; |
492 | f0cbd3ec | bellard | |
493 | f0cbd3ec | bellard | if (so->s != -1 && FD_ISSET(so->s, readfds)) { |
494 | f0cbd3ec | bellard | sorecvfrom(so); |
495 | f0cbd3ec | bellard | } |
496 | f0cbd3ec | bellard | } |
497 | f0cbd3ec | bellard | } |
498 | f0cbd3ec | bellard | |
499 | f0cbd3ec | bellard | /*
|
500 | f0cbd3ec | bellard | * See if we can start outputting
|
501 | f0cbd3ec | bellard | */
|
502 | f0cbd3ec | bellard | if (if_queued && link_up)
|
503 | f0cbd3ec | bellard | if_start(); |
504 | 02d2c54c | bellard | |
505 | 02d2c54c | bellard | /* clear global file descriptor sets.
|
506 | 02d2c54c | bellard | * these reside on the stack in vl.c
|
507 | 02d2c54c | bellard | * so they're unusable if we're not in
|
508 | 02d2c54c | bellard | * slirp_select_fill or slirp_select_poll.
|
509 | 02d2c54c | bellard | */
|
510 | 02d2c54c | bellard | global_readfds = NULL;
|
511 | 02d2c54c | bellard | global_writefds = NULL;
|
512 | 02d2c54c | bellard | global_xfds = NULL;
|
513 | f0cbd3ec | bellard | } |
514 | f0cbd3ec | bellard | |
515 | f0cbd3ec | bellard | #define ETH_ALEN 6 |
516 | f0cbd3ec | bellard | #define ETH_HLEN 14 |
517 | f0cbd3ec | bellard | |
518 | f0cbd3ec | bellard | #define ETH_P_IP 0x0800 /* Internet Protocol packet */ |
519 | f0cbd3ec | bellard | #define ETH_P_ARP 0x0806 /* Address Resolution packet */ |
520 | f0cbd3ec | bellard | |
521 | f0cbd3ec | bellard | #define ARPOP_REQUEST 1 /* ARP request */ |
522 | f0cbd3ec | bellard | #define ARPOP_REPLY 2 /* ARP reply */ |
523 | f0cbd3ec | bellard | |
524 | f0cbd3ec | bellard | struct ethhdr
|
525 | f0cbd3ec | bellard | { |
526 | f0cbd3ec | bellard | unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ |
527 | f0cbd3ec | bellard | unsigned char h_source[ETH_ALEN]; /* source ether addr */ |
528 | f0cbd3ec | bellard | unsigned short h_proto; /* packet type ID field */ |
529 | f0cbd3ec | bellard | }; |
530 | f0cbd3ec | bellard | |
531 | f0cbd3ec | bellard | struct arphdr
|
532 | f0cbd3ec | bellard | { |
533 | f0cbd3ec | bellard | unsigned short ar_hrd; /* format of hardware address */ |
534 | f0cbd3ec | bellard | unsigned short ar_pro; /* format of protocol address */ |
535 | f0cbd3ec | bellard | unsigned char ar_hln; /* length of hardware address */ |
536 | f0cbd3ec | bellard | unsigned char ar_pln; /* length of protocol address */ |
537 | f0cbd3ec | bellard | unsigned short ar_op; /* ARP opcode (command) */ |
538 | f0cbd3ec | bellard | |
539 | f0cbd3ec | bellard | /*
|
540 | f0cbd3ec | bellard | * Ethernet looks like this : This bit is variable sized however...
|
541 | f0cbd3ec | bellard | */
|
542 | f0cbd3ec | bellard | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ |
543 | f0cbd3ec | bellard | unsigned char ar_sip[4]; /* sender IP address */ |
544 | f0cbd3ec | bellard | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ |
545 | f0cbd3ec | bellard | unsigned char ar_tip[4]; /* target IP address */ |
546 | f0cbd3ec | bellard | }; |
547 | f0cbd3ec | bellard | |
548 | f0cbd3ec | bellard | void arp_input(const uint8_t *pkt, int pkt_len) |
549 | f0cbd3ec | bellard | { |
550 | f0cbd3ec | bellard | struct ethhdr *eh = (struct ethhdr *)pkt; |
551 | f0cbd3ec | bellard | struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); |
552 | f0cbd3ec | bellard | uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)]; |
553 | f0cbd3ec | bellard | struct ethhdr *reh = (struct ethhdr *)arp_reply; |
554 | f0cbd3ec | bellard | struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); |
555 | f0cbd3ec | bellard | int ar_op;
|
556 | a3d4af03 | bellard | struct ex_list *ex_ptr;
|
557 | f0cbd3ec | bellard | |
558 | f0cbd3ec | bellard | ar_op = ntohs(ah->ar_op); |
559 | f0cbd3ec | bellard | switch(ar_op) {
|
560 | f0cbd3ec | bellard | case ARPOP_REQUEST:
|
561 | a3d4af03 | bellard | if (!memcmp(ah->ar_tip, &special_addr, 3)) { |
562 | a3d4af03 | bellard | if (ah->ar_tip[3] == CTL_DNS || ah->ar_tip[3] == CTL_ALIAS) |
563 | a3d4af03 | bellard | goto arp_ok;
|
564 | a3d4af03 | bellard | for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
565 | a3d4af03 | bellard | if (ex_ptr->ex_addr == ah->ar_tip[3]) |
566 | a3d4af03 | bellard | goto arp_ok;
|
567 | a3d4af03 | bellard | } |
568 | a3d4af03 | bellard | return;
|
569 | a3d4af03 | bellard | arp_ok:
|
570 | f0cbd3ec | bellard | /* XXX: make an ARP request to have the client address */
|
571 | f0cbd3ec | bellard | memcpy(client_ethaddr, eh->h_source, ETH_ALEN); |
572 | f0cbd3ec | bellard | |
573 | f0cbd3ec | bellard | /* ARP request for alias/dns mac address */
|
574 | f0cbd3ec | bellard | memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); |
575 | f0cbd3ec | bellard | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1);
|
576 | f0cbd3ec | bellard | reh->h_source[5] = ah->ar_tip[3]; |
577 | f0cbd3ec | bellard | reh->h_proto = htons(ETH_P_ARP); |
578 | f0cbd3ec | bellard | |
579 | f0cbd3ec | bellard | rah->ar_hrd = htons(1);
|
580 | f0cbd3ec | bellard | rah->ar_pro = htons(ETH_P_IP); |
581 | f0cbd3ec | bellard | rah->ar_hln = ETH_ALEN; |
582 | f0cbd3ec | bellard | rah->ar_pln = 4;
|
583 | f0cbd3ec | bellard | rah->ar_op = htons(ARPOP_REPLY); |
584 | f0cbd3ec | bellard | memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); |
585 | f0cbd3ec | bellard | memcpy(rah->ar_sip, ah->ar_tip, 4);
|
586 | f0cbd3ec | bellard | memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); |
587 | f0cbd3ec | bellard | memcpy(rah->ar_tip, ah->ar_sip, 4);
|
588 | f0cbd3ec | bellard | slirp_output(arp_reply, sizeof(arp_reply));
|
589 | f0cbd3ec | bellard | } |
590 | f0cbd3ec | bellard | break;
|
591 | f0cbd3ec | bellard | default:
|
592 | f0cbd3ec | bellard | break;
|
593 | f0cbd3ec | bellard | } |
594 | f0cbd3ec | bellard | } |
595 | f0cbd3ec | bellard | |
596 | f0cbd3ec | bellard | void slirp_input(const uint8_t *pkt, int pkt_len) |
597 | f0cbd3ec | bellard | { |
598 | f0cbd3ec | bellard | struct mbuf *m;
|
599 | f0cbd3ec | bellard | int proto;
|
600 | f0cbd3ec | bellard | |
601 | f0cbd3ec | bellard | if (pkt_len < ETH_HLEN)
|
602 | f0cbd3ec | bellard | return;
|
603 | f0cbd3ec | bellard | |
604 | f0cbd3ec | bellard | proto = ntohs(*(uint16_t *)(pkt + 12));
|
605 | f0cbd3ec | bellard | switch(proto) {
|
606 | f0cbd3ec | bellard | case ETH_P_ARP:
|
607 | f0cbd3ec | bellard | arp_input(pkt, pkt_len); |
608 | f0cbd3ec | bellard | break;
|
609 | f0cbd3ec | bellard | case ETH_P_IP:
|
610 | f0cbd3ec | bellard | m = m_get(); |
611 | f0cbd3ec | bellard | if (!m)
|
612 | f0cbd3ec | bellard | return;
|
613 | 38f3e7c2 | bellard | /* Note: we add to align the IP header */
|
614 | 38f3e7c2 | bellard | m->m_len = pkt_len + 2;
|
615 | 38f3e7c2 | bellard | memcpy(m->m_data + 2, pkt, pkt_len);
|
616 | f0cbd3ec | bellard | |
617 | 38f3e7c2 | bellard | m->m_data += 2 + ETH_HLEN;
|
618 | 38f3e7c2 | bellard | m->m_len -= 2 + ETH_HLEN;
|
619 | f0cbd3ec | bellard | |
620 | f0cbd3ec | bellard | ip_input(m); |
621 | f0cbd3ec | bellard | break;
|
622 | f0cbd3ec | bellard | default:
|
623 | f0cbd3ec | bellard | break;
|
624 | f0cbd3ec | bellard | } |
625 | f0cbd3ec | bellard | } |
626 | f0cbd3ec | bellard | |
627 | f0cbd3ec | bellard | /* output the IP packet to the ethernet device */
|
628 | f0cbd3ec | bellard | void if_encap(const uint8_t *ip_data, int ip_data_len) |
629 | f0cbd3ec | bellard | { |
630 | f0cbd3ec | bellard | uint8_t buf[1600];
|
631 | f0cbd3ec | bellard | struct ethhdr *eh = (struct ethhdr *)buf; |
632 | f0cbd3ec | bellard | |
633 | f0cbd3ec | bellard | if (ip_data_len + ETH_HLEN > sizeof(buf)) |
634 | f0cbd3ec | bellard | return;
|
635 | f0cbd3ec | bellard | |
636 | f0cbd3ec | bellard | memcpy(eh->h_dest, client_ethaddr, ETH_ALEN); |
637 | f0cbd3ec | bellard | memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
|
638 | a3d4af03 | bellard | /* XXX: not correct */
|
639 | f0cbd3ec | bellard | eh->h_source[5] = CTL_ALIAS;
|
640 | f0cbd3ec | bellard | eh->h_proto = htons(ETH_P_IP); |
641 | f0cbd3ec | bellard | memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len); |
642 | f0cbd3ec | bellard | slirp_output(buf, ip_data_len + ETH_HLEN); |
643 | f0cbd3ec | bellard | } |
644 | 9bf05444 | bellard | |
645 | 9bf05444 | bellard | int slirp_redir(int is_udp, int host_port, |
646 | 9bf05444 | bellard | struct in_addr guest_addr, int guest_port) |
647 | 9bf05444 | bellard | { |
648 | 9bf05444 | bellard | if (is_udp) {
|
649 | 9bf05444 | bellard | if (!udp_listen(htons(host_port), guest_addr.s_addr,
|
650 | 9bf05444 | bellard | htons(guest_port), 0))
|
651 | 9bf05444 | bellard | return -1; |
652 | 9bf05444 | bellard | } else {
|
653 | 9bf05444 | bellard | if (!solisten(htons(host_port), guest_addr.s_addr,
|
654 | 9bf05444 | bellard | htons(guest_port), 0))
|
655 | 9bf05444 | bellard | return -1; |
656 | 9bf05444 | bellard | } |
657 | 9bf05444 | bellard | return 0; |
658 | 9bf05444 | bellard | } |
659 | a3d4af03 | bellard | |
660 | a3d4af03 | bellard | int slirp_add_exec(int do_pty, const char *args, int addr_low_byte, |
661 | a3d4af03 | bellard | int guest_port)
|
662 | a3d4af03 | bellard | { |
663 | a3d4af03 | bellard | return add_exec(&exec_list, do_pty, (char *)args, |
664 | a3d4af03 | bellard | addr_low_byte, htons(guest_port)); |
665 | a3d4af03 | bellard | } |