Annotation of qemu/slirp/misc.c, revision 1.1.1.9
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: void
1.1.1.5 root 268: u_sleep(int usec)
1.1 root 269: {
270: struct timeval t;
271: fd_set fdset;
1.1.1.3 root 272:
1.1 root 273: FD_ZERO(&fdset);
1.1.1.3 root 274:
1.1 root 275: t.tv_sec = 0;
276: t.tv_usec = usec * 1000;
1.1.1.3 root 277:
1.1 root 278: select(0, &fdset, &fdset, &fdset, &t);
279: }
280:
281: /*
282: * Set fd blocking and non-blocking
283: */
284:
285: void
1.1.1.5 root 286: fd_nonblock(int fd)
1.1 root 287: {
288: #ifdef FIONBIO
1.1.1.5 root 289: #ifdef _WIN32
290: unsigned long opt = 1;
291: #else
292: int opt = 1;
293: #endif
1.1.1.3 root 294:
1.1 root 295: ioctlsocket(fd, FIONBIO, &opt);
296: #else
297: int opt;
1.1.1.3 root 298:
1.1 root 299: opt = fcntl(fd, F_GETFL, 0);
300: opt |= O_NONBLOCK;
301: fcntl(fd, F_SETFL, opt);
302: #endif
303: }
304:
305: void
1.1.1.5 root 306: fd_block(int fd)
1.1 root 307: {
308: #ifdef FIONBIO
1.1.1.5 root 309: #ifdef _WIN32
310: unsigned long opt = 0;
311: #else
1.1 root 312: int opt = 0;
1.1.1.5 root 313: #endif
1.1.1.3 root 314:
1.1 root 315: ioctlsocket(fd, FIONBIO, &opt);
316: #else
317: int opt;
1.1.1.3 root 318:
1.1 root 319: opt = fcntl(fd, F_GETFL, 0);
320: opt &= ~O_NONBLOCK;
321: fcntl(fd, F_SETFL, opt);
322: #endif
323: }
324:
1.1.1.5 root 325: void slirp_connection_info(Slirp *slirp, Monitor *mon)
1.1 root 326: {
1.1.1.5 root 327: const char * const tcpstates[] = {
328: [TCPS_CLOSED] = "CLOSED",
329: [TCPS_LISTEN] = "LISTEN",
330: [TCPS_SYN_SENT] = "SYN_SENT",
331: [TCPS_SYN_RECEIVED] = "SYN_RCVD",
332: [TCPS_ESTABLISHED] = "ESTABLISHED",
333: [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
334: [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
335: [TCPS_CLOSING] = "CLOSING",
336: [TCPS_LAST_ACK] = "LAST_ACK",
337: [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
338: [TCPS_TIME_WAIT] = "TIME_WAIT",
339: };
340: struct in_addr dst_addr;
341: struct sockaddr_in src;
342: socklen_t src_len;
343: uint16_t dst_port;
344: struct socket *so;
345: const char *state;
346: char buf[20];
347: int n;
348:
349: monitor_printf(mon, " Protocol[State] FD Source Address Port "
350: "Dest. Address Port RecvQ SendQ\n");
351:
352: for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
353: if (so->so_state & SS_HOSTFWD) {
354: state = "HOST_FORWARD";
355: } else if (so->so_tcpcb) {
356: state = tcpstates[so->so_tcpcb->t_state];
357: } else {
358: state = "NONE";
1.1 root 359: }
1.1.1.5 root 360: if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
361: src_len = sizeof(src);
362: getsockname(so->s, (struct sockaddr *)&src, &src_len);
363: dst_addr = so->so_laddr;
364: dst_port = so->so_lport;
365: } else {
366: src.sin_addr = so->so_laddr;
367: src.sin_port = so->so_lport;
368: dst_addr = so->so_faddr;
369: dst_port = so->so_fport;
1.1 root 370: }
1.1.1.5 root 371: n = snprintf(buf, sizeof(buf), " TCP[%s]", state);
372: memset(&buf[n], ' ', 19 - n);
373: buf[19] = 0;
374: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
375: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
376: ntohs(src.sin_port));
377: monitor_printf(mon, "%15s %5d %5d %5d\n",
378: inet_ntoa(dst_addr), ntohs(dst_port),
379: so->so_rcv.sb_cc, so->so_snd.sb_cc);
380: }
1.1.1.3 root 381:
1.1.1.5 root 382: for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
383: if (so->so_state & SS_HOSTFWD) {
384: n = snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
385: src_len = sizeof(src);
386: getsockname(so->s, (struct sockaddr *)&src, &src_len);
387: dst_addr = so->so_laddr;
388: dst_port = so->so_lport;
389: } else {
390: n = snprintf(buf, sizeof(buf), " UDP[%d sec]",
391: (so->so_expire - curtime) / 1000);
392: src.sin_addr = so->so_laddr;
393: src.sin_port = so->so_lport;
394: dst_addr = so->so_faddr;
395: dst_port = so->so_fport;
396: }
397: memset(&buf[n], ' ', 19 - n);
398: buf[19] = 0;
399: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
400: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
401: ntohs(src.sin_port));
402: monitor_printf(mon, "%15s %5d %5d %5d\n",
403: inet_ntoa(dst_addr), ntohs(dst_port),
404: so->so_rcv.sb_cc, so->so_snd.sb_cc);
405: }
1.1 root 406: }
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