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1.1 root 1: /*
2: * Copyright (c) 1995 Danny Gasparovski.
1.1.1.3 root 3: *
1.1 root 4: * Please read the file COPYRIGHT for the
5: * terms and conditions of the copyright.
6: */
7:
8: #include <slirp.h>
1.1.1.5 root 9: #include <libslirp.h>
1.1 root 10:
1.1.1.5 root 11: #include "monitor.h"
1.1 root 12:
1.1.1.5 root 13: #ifdef DEBUG
14: int slirp_debug = DBG_CALL|DBG_MISC|DBG_ERROR;
1.1 root 15: #endif
16:
17: struct quehead {
18: struct quehead *qh_link;
19: struct quehead *qh_rlink;
20: };
21:
22: inline void
1.1.1.5 root 23: insque(void *a, void *b)
1.1 root 24: {
25: register struct quehead *element = (struct quehead *) a;
26: register struct quehead *head = (struct quehead *) b;
27: element->qh_link = head->qh_link;
28: head->qh_link = (struct quehead *)element;
29: element->qh_rlink = (struct quehead *)head;
30: ((struct quehead *)(element->qh_link))->qh_rlink
31: = (struct quehead *)element;
32: }
33:
34: inline void
1.1.1.5 root 35: remque(void *a)
1.1 root 36: {
37: register struct quehead *element = (struct quehead *) a;
38: ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
39: ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
40: element->qh_rlink = NULL;
41: }
42:
1.1.1.5 root 43: int add_exec(struct ex_list **ex_ptr, int do_pty, char *exec,
44: struct in_addr addr, int port)
1.1 root 45: {
46: struct ex_list *tmp_ptr;
1.1.1.3 root 47:
1.1 root 48: /* First, check if the port is "bound" */
49: for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
1.1.1.5 root 50: if (port == tmp_ptr->ex_fport &&
51: addr.s_addr == tmp_ptr->ex_addr.s_addr)
52: return -1;
1.1 root 53: }
1.1.1.3 root 54:
1.1 root 55: tmp_ptr = *ex_ptr;
56: *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
57: (*ex_ptr)->ex_fport = port;
58: (*ex_ptr)->ex_addr = addr;
59: (*ex_ptr)->ex_pty = do_pty;
1.1.1.4 root 60: (*ex_ptr)->ex_exec = (do_pty == 3) ? exec : strdup(exec);
1.1 root 61: (*ex_ptr)->ex_next = tmp_ptr;
62: return 0;
63: }
64:
65: #ifndef HAVE_STRERROR
66:
67: /*
68: * For systems with no strerror
69: */
70:
71: extern int sys_nerr;
72: extern char *sys_errlist[];
73:
74: char *
75: strerror(error)
76: int error;
77: {
78: if (error < sys_nerr)
79: return sys_errlist[error];
80: else
81: return "Unknown error.";
82: }
83:
84: #endif
85:
86:
87: #ifdef _WIN32
88:
89: int
1.1.1.3 root 90: fork_exec(struct socket *so, const char *ex, int do_pty)
1.1 root 91: {
92: /* not implemented */
93: return 0;
94: }
95:
96: #else
97:
98: /*
99: * XXX This is ugly
100: * We create and bind a socket, then fork off to another
101: * process, which connects to this socket, after which we
102: * exec the wanted program. If something (strange) happens,
103: * the accept() call could block us forever.
1.1.1.3 root 104: *
1.1 root 105: * do_pty = 0 Fork/exec inetd style
106: * do_pty = 1 Fork/exec using slirp.telnetd
107: * do_ptr = 2 Fork/exec using pty
108: */
109: int
1.1.1.3 root 110: fork_exec(struct socket *so, const char *ex, int do_pty)
1.1 root 111: {
112: int s;
113: struct sockaddr_in addr;
1.1.1.4 root 114: socklen_t addrlen = sizeof(addr);
1.1 root 115: int opt;
1.1.1.4 root 116: const char *argv[256];
1.1 root 117: /* don't want to clobber the original */
118: char *bptr;
1.1.1.3 root 119: const char *curarg;
1.1 root 120: int c, i, ret;
1.1.1.10 root 121: pid_t pid;
1.1.1.3 root 122:
1.1 root 123: DEBUG_CALL("fork_exec");
124: DEBUG_ARG("so = %lx", (long)so);
125: DEBUG_ARG("ex = %lx", (long)ex);
126: DEBUG_ARG("do_pty = %lx", (long)do_pty);
1.1.1.3 root 127:
1.1 root 128: if (do_pty == 2) {
1.1.1.3 root 129: return 0;
1.1 root 130: } else {
131: addr.sin_family = AF_INET;
132: addr.sin_port = 0;
133: addr.sin_addr.s_addr = INADDR_ANY;
1.1.1.3 root 134:
1.1.1.6 root 135: if ((s = qemu_socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
1.1 root 136: bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
137: listen(s, 1) < 0) {
138: lprint("Error: inet socket: %s\n", strerror(errno));
139: closesocket(s);
1.1.1.3 root 140:
1.1 root 141: return 0;
142: }
143: }
1.1.1.3 root 144:
1.1.1.10 root 145: pid = fork();
146: switch(pid) {
1.1 root 147: case -1:
148: lprint("Error: fork failed: %s\n", strerror(errno));
149: close(s);
150: return 0;
1.1.1.3 root 151:
1.1 root 152: case 0:
1.1.1.10 root 153: setsid();
154:
1.1 root 155: /* Set the DISPLAY */
1.1.1.12! root 156: getsockname(s, (struct sockaddr *)&addr, &addrlen);
! 157: close(s);
! 158: /*
! 159: * Connect to the socket
! 160: * XXX If any of these fail, we're in trouble!
! 161: */
! 162: s = qemu_socket(AF_INET, SOCK_STREAM, 0);
! 163: addr.sin_addr = loopback_addr;
! 164: do {
! 165: ret = connect(s, (struct sockaddr *)&addr, addrlen);
! 166: } while (ret < 0 && errno == EINTR);
1.1.1.3 root 167:
1.1 root 168: dup2(s, 0);
169: dup2(s, 1);
170: dup2(s, 2);
1.1.1.3 root 171: for (s = getdtablesize() - 1; s >= 3; s--)
1.1 root 172: close(s);
1.1.1.3 root 173:
1.1 root 174: i = 0;
1.1.1.11 root 175: bptr = g_strdup(ex); /* No need to free() this */
1.1 root 176: if (do_pty == 1) {
177: /* Setup "slirp.telnetd -x" */
178: argv[i++] = "slirp.telnetd";
179: argv[i++] = "-x";
180: argv[i++] = bptr;
181: } else
182: do {
183: /* Change the string into argv[] */
184: curarg = bptr;
185: while (*bptr != ' ' && *bptr != (char)0)
186: bptr++;
187: c = *bptr;
188: *bptr++ = (char)0;
189: argv[i++] = strdup(curarg);
190: } while (c);
1.1.1.3 root 191:
1.1.1.5 root 192: argv[i] = NULL;
1.1.1.4 root 193: execvp(argv[0], (char **)argv);
1.1.1.3 root 194:
1.1 root 195: /* Ooops, failed, let's tell the user why */
1.1.1.8 root 196: fprintf(stderr, "Error: execvp of %s failed: %s\n",
197: argv[0], strerror(errno));
1.1 root 198: close(0); close(1); close(2); /* XXX */
199: exit(1);
1.1.1.3 root 200:
1.1 root 201: default:
1.1.1.10 root 202: qemu_add_child_watch(pid);
1.1.1.12! root 203: /*
! 204: * XXX this could block us...
! 205: * XXX Should set a timer here, and if accept() doesn't
! 206: * return after X seconds, declare it a failure
! 207: * The only reason this will block forever is if socket()
! 208: * of connect() fail in the child process
! 209: */
! 210: do {
! 211: so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
! 212: } while (so->s < 0 && errno == EINTR);
! 213: closesocket(s);
! 214: opt = 1;
! 215: setsockopt(so->s, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, sizeof(int));
! 216: opt = 1;
! 217: setsockopt(so->s, SOL_SOCKET, SO_OOBINLINE, (char *)&opt, sizeof(int));
! 218: socket_set_nonblock(so->s);
1.1.1.3 root 219:
1.1 root 220: /* Append the telnet options now */
1.1.1.5 root 221: if (so->so_m != NULL && do_pty == 1) {
1.1 root 222: sbappend(so, so->so_m);
1.1.1.5 root 223: so->so_m = NULL;
1.1 root 224: }
1.1.1.3 root 225:
1.1 root 226: return 1;
227: }
228: }
229: #endif
230:
231: #ifndef HAVE_STRDUP
232: char *
233: strdup(str)
234: const char *str;
235: {
236: char *bptr;
1.1.1.3 root 237:
1.1 root 238: bptr = (char *)malloc(strlen(str)+1);
239: strcpy(bptr, str);
1.1.1.3 root 240:
1.1 root 241: return bptr;
242: }
243: #endif
244:
1.1.1.5 root 245: #include "monitor.h"
1.1.1.3 root 246:
247: void lprint(const char *format, ...)
248: {
249: va_list args;
250:
251: va_start(args, format);
1.1.1.8 root 252: monitor_vprintf(default_mon, format, args);
1.1.1.3 root 253: va_end(args);
254: }
1.1 root 255:
256: void
1.1.1.5 root 257: u_sleep(int usec)
1.1 root 258: {
259: struct timeval t;
260: fd_set fdset;
1.1.1.3 root 261:
1.1 root 262: FD_ZERO(&fdset);
1.1.1.3 root 263:
1.1 root 264: t.tv_sec = 0;
265: t.tv_usec = usec * 1000;
1.1.1.3 root 266:
1.1 root 267: select(0, &fdset, &fdset, &fdset, &t);
268: }
269:
1.1.1.5 root 270: void slirp_connection_info(Slirp *slirp, Monitor *mon)
1.1 root 271: {
1.1.1.5 root 272: const char * const tcpstates[] = {
273: [TCPS_CLOSED] = "CLOSED",
274: [TCPS_LISTEN] = "LISTEN",
275: [TCPS_SYN_SENT] = "SYN_SENT",
276: [TCPS_SYN_RECEIVED] = "SYN_RCVD",
277: [TCPS_ESTABLISHED] = "ESTABLISHED",
278: [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
279: [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
280: [TCPS_CLOSING] = "CLOSING",
281: [TCPS_LAST_ACK] = "LAST_ACK",
282: [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
283: [TCPS_TIME_WAIT] = "TIME_WAIT",
284: };
285: struct in_addr dst_addr;
286: struct sockaddr_in src;
287: socklen_t src_len;
288: uint16_t dst_port;
289: struct socket *so;
290: const char *state;
291: char buf[20];
292:
293: monitor_printf(mon, " Protocol[State] FD Source Address Port "
294: "Dest. Address Port RecvQ SendQ\n");
295:
296: for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
297: if (so->so_state & SS_HOSTFWD) {
298: state = "HOST_FORWARD";
299: } else if (so->so_tcpcb) {
300: state = tcpstates[so->so_tcpcb->t_state];
301: } else {
302: state = "NONE";
1.1 root 303: }
1.1.1.5 root 304: if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
305: src_len = sizeof(src);
306: getsockname(so->s, (struct sockaddr *)&src, &src_len);
307: dst_addr = so->so_laddr;
308: dst_port = so->so_lport;
309: } else {
310: src.sin_addr = so->so_laddr;
311: src.sin_port = so->so_lport;
312: dst_addr = so->so_faddr;
313: dst_port = so->so_fport;
1.1 root 314: }
1.1.1.12! root 315: snprintf(buf, sizeof(buf), " TCP[%s]", state);
! 316: monitor_printf(mon, "%-19s %3d %15s %5d ", buf, so->s,
1.1.1.5 root 317: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
318: ntohs(src.sin_port));
319: monitor_printf(mon, "%15s %5d %5d %5d\n",
320: inet_ntoa(dst_addr), ntohs(dst_port),
321: so->so_rcv.sb_cc, so->so_snd.sb_cc);
322: }
1.1.1.3 root 323:
1.1.1.5 root 324: for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
325: if (so->so_state & SS_HOSTFWD) {
1.1.1.12! root 326: snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
1.1.1.5 root 327: src_len = sizeof(src);
328: getsockname(so->s, (struct sockaddr *)&src, &src_len);
329: dst_addr = so->so_laddr;
330: dst_port = so->so_lport;
331: } else {
1.1.1.12! root 332: snprintf(buf, sizeof(buf), " UDP[%d sec]",
1.1.1.5 root 333: (so->so_expire - curtime) / 1000);
334: src.sin_addr = so->so_laddr;
335: src.sin_port = so->so_lport;
336: dst_addr = so->so_faddr;
337: dst_port = so->so_fport;
338: }
1.1.1.12! root 339: monitor_printf(mon, "%-19s %3d %15s %5d ", buf, so->s,
1.1.1.5 root 340: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
341: ntohs(src.sin_port));
342: monitor_printf(mon, "%15s %5d %5d %5d\n",
343: inet_ntoa(dst_addr), ntohs(dst_port),
344: so->so_rcv.sb_cc, so->so_snd.sb_cc);
345: }
1.1.1.10 root 346:
347: for (so = slirp->icmp.so_next; so != &slirp->icmp; so = so->so_next) {
1.1.1.12! root 348: snprintf(buf, sizeof(buf), " ICMP[%d sec]",
1.1.1.10 root 349: (so->so_expire - curtime) / 1000);
350: src.sin_addr = so->so_laddr;
351: dst_addr = so->so_faddr;
1.1.1.12! root 352: monitor_printf(mon, "%-19s %3d %15s - ", buf, so->s,
1.1.1.10 root 353: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*");
354: monitor_printf(mon, "%15s - %5d %5d\n", inet_ntoa(dst_addr),
355: so->so_rcv.sb_cc, so->so_snd.sb_cc);
356: }
1.1 root 357: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.