Annotation of qemu/slirp/misc.c, revision 1.1.1.6
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;
182: bptr = strdup(ex); /* No need to free() this */
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 */
203: {
204: char buff[256];
1.1.1.3 root 205:
1.1.1.4 root 206: snprintf(buff, sizeof(buff),
207: "Error: execvp of %s failed: %s\n",
208: argv[0], strerror(errno));
1.1 root 209: write(2, buff, strlen(buff)+1);
210: }
211: close(0); close(1); close(2); /* XXX */
212: exit(1);
1.1.1.3 root 213:
1.1 root 214: default:
215: if (do_pty == 2) {
216: close(s);
217: so->s = master;
218: } else {
219: /*
220: * XXX this could block us...
221: * XXX Should set a timer here, and if accept() doesn't
222: * return after X seconds, declare it a failure
223: * The only reason this will block forever is if socket()
224: * of connect() fail in the child process
225: */
226: do {
227: so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
228: } while (so->s < 0 && errno == EINTR);
229: closesocket(s);
230: opt = 1;
231: setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
232: opt = 1;
233: setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
234: }
235: fd_nonblock(so->s);
1.1.1.3 root 236:
1.1 root 237: /* Append the telnet options now */
1.1.1.5 root 238: if (so->so_m != NULL && do_pty == 1) {
1.1 root 239: sbappend(so, so->so_m);
1.1.1.5 root 240: so->so_m = NULL;
1.1 root 241: }
1.1.1.3 root 242:
1.1 root 243: return 1;
244: }
245: }
246: #endif
247:
248: #ifndef HAVE_STRDUP
249: char *
250: strdup(str)
251: const char *str;
252: {
253: char *bptr;
1.1.1.3 root 254:
1.1 root 255: bptr = (char *)malloc(strlen(str)+1);
256: strcpy(bptr, str);
1.1.1.3 root 257:
1.1 root 258: return bptr;
259: }
260: #endif
261:
1.1.1.5 root 262: #include "monitor.h"
1.1.1.3 root 263:
264: void lprint(const char *format, ...)
265: {
266: va_list args;
267:
268: va_start(args, format);
1.1.1.5 root 269: monitor_vprintf(cur_mon, format, args);
1.1.1.3 root 270: va_end(args);
271: }
1.1 root 272:
273: #ifdef BAD_SPRINTF
274:
275: #undef vsprintf
276: #undef sprintf
277:
278: /*
279: * Some BSD-derived systems have a sprintf which returns char *
280: */
281:
282: int
283: vsprintf_len(string, format, args)
284: char *string;
285: const char *format;
286: va_list args;
287: {
288: vsprintf(string, format, args);
289: return strlen(string);
290: }
291:
292: int
293: #ifdef __STDC__
294: sprintf_len(char *string, const char *format, ...)
295: #else
296: sprintf_len(va_alist) va_dcl
297: #endif
298: {
299: va_list args;
300: #ifdef __STDC__
301: va_start(args, format);
302: #else
303: char *string;
304: char *format;
305: va_start(args);
306: string = va_arg(args, char *);
307: format = va_arg(args, char *);
308: #endif
309: vsprintf(string, format, args);
310: return strlen(string);
311: }
312:
313: #endif
314:
315: void
1.1.1.5 root 316: u_sleep(int usec)
1.1 root 317: {
318: struct timeval t;
319: fd_set fdset;
1.1.1.3 root 320:
1.1 root 321: FD_ZERO(&fdset);
1.1.1.3 root 322:
1.1 root 323: t.tv_sec = 0;
324: t.tv_usec = usec * 1000;
1.1.1.3 root 325:
1.1 root 326: select(0, &fdset, &fdset, &fdset, &t);
327: }
328:
329: /*
330: * Set fd blocking and non-blocking
331: */
332:
333: void
1.1.1.5 root 334: fd_nonblock(int fd)
1.1 root 335: {
336: #ifdef FIONBIO
1.1.1.5 root 337: #ifdef _WIN32
338: unsigned long opt = 1;
339: #else
340: int opt = 1;
341: #endif
1.1.1.3 root 342:
1.1 root 343: ioctlsocket(fd, FIONBIO, &opt);
344: #else
345: int opt;
1.1.1.3 root 346:
1.1 root 347: opt = fcntl(fd, F_GETFL, 0);
348: opt |= O_NONBLOCK;
349: fcntl(fd, F_SETFL, opt);
350: #endif
351: }
352:
353: void
1.1.1.5 root 354: fd_block(int fd)
1.1 root 355: {
356: #ifdef FIONBIO
1.1.1.5 root 357: #ifdef _WIN32
358: unsigned long opt = 0;
359: #else
1.1 root 360: int opt = 0;
1.1.1.5 root 361: #endif
1.1.1.3 root 362:
1.1 root 363: ioctlsocket(fd, FIONBIO, &opt);
364: #else
365: int opt;
1.1.1.3 root 366:
1.1 root 367: opt = fcntl(fd, F_GETFL, 0);
368: opt &= ~O_NONBLOCK;
369: fcntl(fd, F_SETFL, opt);
370: #endif
371: }
372:
1.1.1.5 root 373: void slirp_connection_info(Slirp *slirp, Monitor *mon)
1.1 root 374: {
1.1.1.5 root 375: const char * const tcpstates[] = {
376: [TCPS_CLOSED] = "CLOSED",
377: [TCPS_LISTEN] = "LISTEN",
378: [TCPS_SYN_SENT] = "SYN_SENT",
379: [TCPS_SYN_RECEIVED] = "SYN_RCVD",
380: [TCPS_ESTABLISHED] = "ESTABLISHED",
381: [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
382: [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
383: [TCPS_CLOSING] = "CLOSING",
384: [TCPS_LAST_ACK] = "LAST_ACK",
385: [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
386: [TCPS_TIME_WAIT] = "TIME_WAIT",
387: };
388: struct in_addr dst_addr;
389: struct sockaddr_in src;
390: socklen_t src_len;
391: uint16_t dst_port;
392: struct socket *so;
393: const char *state;
394: char buf[20];
395: int n;
396:
397: monitor_printf(mon, " Protocol[State] FD Source Address Port "
398: "Dest. Address Port RecvQ SendQ\n");
399:
400: for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
401: if (so->so_state & SS_HOSTFWD) {
402: state = "HOST_FORWARD";
403: } else if (so->so_tcpcb) {
404: state = tcpstates[so->so_tcpcb->t_state];
405: } else {
406: state = "NONE";
1.1 root 407: }
1.1.1.5 root 408: if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
409: src_len = sizeof(src);
410: getsockname(so->s, (struct sockaddr *)&src, &src_len);
411: dst_addr = so->so_laddr;
412: dst_port = so->so_lport;
413: } else {
414: src.sin_addr = so->so_laddr;
415: src.sin_port = so->so_lport;
416: dst_addr = so->so_faddr;
417: dst_port = so->so_fport;
1.1 root 418: }
1.1.1.5 root 419: n = snprintf(buf, sizeof(buf), " TCP[%s]", state);
420: memset(&buf[n], ' ', 19 - n);
421: buf[19] = 0;
422: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
423: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
424: ntohs(src.sin_port));
425: monitor_printf(mon, "%15s %5d %5d %5d\n",
426: inet_ntoa(dst_addr), ntohs(dst_port),
427: so->so_rcv.sb_cc, so->so_snd.sb_cc);
428: }
1.1.1.3 root 429:
1.1.1.5 root 430: for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
431: if (so->so_state & SS_HOSTFWD) {
432: n = snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
433: src_len = sizeof(src);
434: getsockname(so->s, (struct sockaddr *)&src, &src_len);
435: dst_addr = so->so_laddr;
436: dst_port = so->so_lport;
437: } else {
438: n = snprintf(buf, sizeof(buf), " UDP[%d sec]",
439: (so->so_expire - curtime) / 1000);
440: src.sin_addr = so->so_laddr;
441: src.sin_port = so->so_lport;
442: dst_addr = so->so_faddr;
443: dst_port = so->so_fport;
444: }
445: memset(&buf[n], ' ', 19 - n);
446: buf[19] = 0;
447: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
448: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
449: ntohs(src.sin_port));
450: monitor_printf(mon, "%15s %5d %5d %5d\n",
451: inet_ntoa(dst_addr), ntohs(dst_port),
452: so->so_rcv.sb_cc, so->so_snd.sb_cc);
453: }
1.1 root 454: }
unix.superglobalmegacorp.com
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to misc.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Qemu by Fabrice Bellard] / qemu / slirp