Annotation of qemu/slirp/misc.c, revision 1.1.1.8
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;
1.1.1.3 root 116: int master = -1;
1.1.1.4 root 117: const char *argv[256];
1.1 root 118: /* don't want to clobber the original */
119: char *bptr;
1.1.1.3 root 120: const char *curarg;
1.1 root 121: int c, i, ret;
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 root 145: switch(fork()) {
146: case -1:
147: lprint("Error: fork failed: %s\n", strerror(errno));
148: close(s);
149: if (do_pty == 2)
150: close(master);
151: return 0;
1.1.1.3 root 152:
1.1 root 153: case 0:
154: /* Set the DISPLAY */
155: if (do_pty == 2) {
156: (void) close(master);
157: #ifdef TIOCSCTTY /* XXXXX */
158: (void) setsid();
159: ioctl(s, TIOCSCTTY, (char *)NULL);
160: #endif
161: } else {
162: getsockname(s, (struct sockaddr *)&addr, &addrlen);
163: close(s);
164: /*
165: * Connect to the socket
166: * XXX If any of these fail, we're in trouble!
167: */
1.1.1.6 root 168: s = qemu_socket(AF_INET, SOCK_STREAM, 0);
1.1 root 169: addr.sin_addr = loopback_addr;
170: do {
171: ret = connect(s, (struct sockaddr *)&addr, addrlen);
172: } while (ret < 0 && errno == EINTR);
173: }
1.1.1.3 root 174:
1.1 root 175: dup2(s, 0);
176: dup2(s, 1);
177: dup2(s, 2);
1.1.1.3 root 178: for (s = getdtablesize() - 1; s >= 3; s--)
1.1 root 179: close(s);
1.1.1.3 root 180:
1.1 root 181: i = 0;
1.1.1.7 root 182: bptr = qemu_strdup(ex); /* No need to free() this */
1.1 root 183: if (do_pty == 1) {
184: /* Setup "slirp.telnetd -x" */
185: argv[i++] = "slirp.telnetd";
186: argv[i++] = "-x";
187: argv[i++] = bptr;
188: } else
189: do {
190: /* Change the string into argv[] */
191: curarg = bptr;
192: while (*bptr != ' ' && *bptr != (char)0)
193: bptr++;
194: c = *bptr;
195: *bptr++ = (char)0;
196: argv[i++] = strdup(curarg);
197: } while (c);
1.1.1.3 root 198:
1.1.1.5 root 199: argv[i] = NULL;
1.1.1.4 root 200: execvp(argv[0], (char **)argv);
1.1.1.3 root 201:
1.1 root 202: /* Ooops, failed, let's tell the user why */
1.1.1.8 ! root 203: fprintf(stderr, "Error: execvp of %s failed: %s\n",
! 204: argv[0], strerror(errno));
1.1 root 205: close(0); close(1); close(2); /* XXX */
206: exit(1);
1.1.1.3 root 207:
1.1 root 208: default:
209: if (do_pty == 2) {
210: close(s);
211: so->s = master;
212: } else {
213: /*
214: * XXX this could block us...
215: * XXX Should set a timer here, and if accept() doesn't
216: * return after X seconds, declare it a failure
217: * The only reason this will block forever is if socket()
218: * of connect() fail in the child process
219: */
220: do {
221: so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
222: } while (so->s < 0 && errno == EINTR);
223: closesocket(s);
224: opt = 1;
225: setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
226: opt = 1;
227: setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
228: }
229: fd_nonblock(so->s);
1.1.1.3 root 230:
1.1 root 231: /* Append the telnet options now */
1.1.1.5 root 232: if (so->so_m != NULL && do_pty == 1) {
1.1 root 233: sbappend(so, so->so_m);
1.1.1.5 root 234: so->so_m = NULL;
1.1 root 235: }
1.1.1.3 root 236:
1.1 root 237: return 1;
238: }
239: }
240: #endif
241:
242: #ifndef HAVE_STRDUP
243: char *
244: strdup(str)
245: const char *str;
246: {
247: char *bptr;
1.1.1.3 root 248:
1.1 root 249: bptr = (char *)malloc(strlen(str)+1);
250: strcpy(bptr, str);
1.1.1.3 root 251:
1.1 root 252: return bptr;
253: }
254: #endif
255:
1.1.1.5 root 256: #include "monitor.h"
1.1.1.3 root 257:
258: void lprint(const char *format, ...)
259: {
260: va_list args;
261:
262: va_start(args, format);
1.1.1.8 ! root 263: monitor_vprintf(default_mon, format, args);
1.1.1.3 root 264: va_end(args);
265: }
1.1 root 266:
267: #ifdef BAD_SPRINTF
268:
269: #undef vsprintf
270: #undef sprintf
271:
272: /*
273: * Some BSD-derived systems have a sprintf which returns char *
274: */
275:
276: int
277: vsprintf_len(string, format, args)
278: char *string;
279: const char *format;
280: va_list args;
281: {
282: vsprintf(string, format, args);
283: return strlen(string);
284: }
285:
286: int
287: #ifdef __STDC__
288: sprintf_len(char *string, const char *format, ...)
289: #else
290: sprintf_len(va_alist) va_dcl
291: #endif
292: {
293: va_list args;
294: #ifdef __STDC__
295: va_start(args, format);
296: #else
297: char *string;
298: char *format;
299: va_start(args);
300: string = va_arg(args, char *);
301: format = va_arg(args, char *);
302: #endif
303: vsprintf(string, format, args);
304: return strlen(string);
305: }
306:
307: #endif
308:
309: void
1.1.1.5 root 310: u_sleep(int usec)
1.1 root 311: {
312: struct timeval t;
313: fd_set fdset;
1.1.1.3 root 314:
1.1 root 315: FD_ZERO(&fdset);
1.1.1.3 root 316:
1.1 root 317: t.tv_sec = 0;
318: t.tv_usec = usec * 1000;
1.1.1.3 root 319:
1.1 root 320: select(0, &fdset, &fdset, &fdset, &t);
321: }
322:
323: /*
324: * Set fd blocking and non-blocking
325: */
326:
327: void
1.1.1.5 root 328: fd_nonblock(int fd)
1.1 root 329: {
330: #ifdef FIONBIO
1.1.1.5 root 331: #ifdef _WIN32
332: unsigned long opt = 1;
333: #else
334: int opt = 1;
335: #endif
1.1.1.3 root 336:
1.1 root 337: ioctlsocket(fd, FIONBIO, &opt);
338: #else
339: int opt;
1.1.1.3 root 340:
1.1 root 341: opt = fcntl(fd, F_GETFL, 0);
342: opt |= O_NONBLOCK;
343: fcntl(fd, F_SETFL, opt);
344: #endif
345: }
346:
347: void
1.1.1.5 root 348: fd_block(int fd)
1.1 root 349: {
350: #ifdef FIONBIO
1.1.1.5 root 351: #ifdef _WIN32
352: unsigned long opt = 0;
353: #else
1.1 root 354: int opt = 0;
1.1.1.5 root 355: #endif
1.1.1.3 root 356:
1.1 root 357: ioctlsocket(fd, FIONBIO, &opt);
358: #else
359: int opt;
1.1.1.3 root 360:
1.1 root 361: opt = fcntl(fd, F_GETFL, 0);
362: opt &= ~O_NONBLOCK;
363: fcntl(fd, F_SETFL, opt);
364: #endif
365: }
366:
1.1.1.5 root 367: void slirp_connection_info(Slirp *slirp, Monitor *mon)
1.1 root 368: {
1.1.1.5 root 369: const char * const tcpstates[] = {
370: [TCPS_CLOSED] = "CLOSED",
371: [TCPS_LISTEN] = "LISTEN",
372: [TCPS_SYN_SENT] = "SYN_SENT",
373: [TCPS_SYN_RECEIVED] = "SYN_RCVD",
374: [TCPS_ESTABLISHED] = "ESTABLISHED",
375: [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
376: [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
377: [TCPS_CLOSING] = "CLOSING",
378: [TCPS_LAST_ACK] = "LAST_ACK",
379: [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
380: [TCPS_TIME_WAIT] = "TIME_WAIT",
381: };
382: struct in_addr dst_addr;
383: struct sockaddr_in src;
384: socklen_t src_len;
385: uint16_t dst_port;
386: struct socket *so;
387: const char *state;
388: char buf[20];
389: int n;
390:
391: monitor_printf(mon, " Protocol[State] FD Source Address Port "
392: "Dest. Address Port RecvQ SendQ\n");
393:
394: for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
395: if (so->so_state & SS_HOSTFWD) {
396: state = "HOST_FORWARD";
397: } else if (so->so_tcpcb) {
398: state = tcpstates[so->so_tcpcb->t_state];
399: } else {
400: state = "NONE";
1.1 root 401: }
1.1.1.5 root 402: if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
403: src_len = sizeof(src);
404: getsockname(so->s, (struct sockaddr *)&src, &src_len);
405: dst_addr = so->so_laddr;
406: dst_port = so->so_lport;
407: } else {
408: src.sin_addr = so->so_laddr;
409: src.sin_port = so->so_lport;
410: dst_addr = so->so_faddr;
411: dst_port = so->so_fport;
1.1 root 412: }
1.1.1.5 root 413: n = snprintf(buf, sizeof(buf), " TCP[%s]", state);
414: memset(&buf[n], ' ', 19 - n);
415: buf[19] = 0;
416: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
417: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
418: ntohs(src.sin_port));
419: monitor_printf(mon, "%15s %5d %5d %5d\n",
420: inet_ntoa(dst_addr), ntohs(dst_port),
421: so->so_rcv.sb_cc, so->so_snd.sb_cc);
422: }
1.1.1.3 root 423:
1.1.1.5 root 424: for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
425: if (so->so_state & SS_HOSTFWD) {
426: n = snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
427: src_len = sizeof(src);
428: getsockname(so->s, (struct sockaddr *)&src, &src_len);
429: dst_addr = so->so_laddr;
430: dst_port = so->so_lport;
431: } else {
432: n = snprintf(buf, sizeof(buf), " UDP[%d sec]",
433: (so->so_expire - curtime) / 1000);
434: src.sin_addr = so->so_laddr;
435: src.sin_port = so->so_lport;
436: dst_addr = so->so_faddr;
437: dst_port = so->so_fport;
438: }
439: memset(&buf[n], ' ', 19 - n);
440: buf[19] = 0;
441: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
442: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
443: ntohs(src.sin_port));
444: monitor_printf(mon, "%15s %5d %5d %5d\n",
445: inet_ntoa(dst_addr), ntohs(dst_port),
446: so->so_rcv.sb_cc, so->so_snd.sb_cc);
447: }
1.1 root 448: }
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