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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;
1.1.1.3 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;
1.1.1.10 root 122: pid_t pid;
1.1.1.3 root 123:
1.1 root 124: DEBUG_CALL("fork_exec");
125: DEBUG_ARG("so = %lx", (long)so);
126: DEBUG_ARG("ex = %lx", (long)ex);
127: DEBUG_ARG("do_pty = %lx", (long)do_pty);
1.1.1.3 root 128:
1.1 root 129: if (do_pty == 2) {
1.1.1.3 root 130: return 0;
1.1 root 131: } else {
132: addr.sin_family = AF_INET;
133: addr.sin_port = 0;
134: addr.sin_addr.s_addr = INADDR_ANY;
1.1.1.3 root 135:
1.1.1.6 root 136: if ((s = qemu_socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
1.1 root 137: bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
138: listen(s, 1) < 0) {
139: lprint("Error: inet socket: %s\n", strerror(errno));
140: closesocket(s);
1.1.1.3 root 141:
1.1 root 142: return 0;
143: }
144: }
1.1.1.3 root 145:
1.1.1.10 root 146: pid = fork();
147: switch(pid) {
1.1 root 148: case -1:
149: lprint("Error: fork failed: %s\n", strerror(errno));
150: close(s);
151: if (do_pty == 2)
152: close(master);
153: return 0;
1.1.1.3 root 154:
1.1 root 155: case 0:
1.1.1.10 root 156: setsid();
157:
1.1 root 158: /* Set the DISPLAY */
159: if (do_pty == 2) {
160: (void) close(master);
161: #ifdef TIOCSCTTY /* XXXXX */
162: ioctl(s, TIOCSCTTY, (char *)NULL);
163: #endif
164: } else {
165: getsockname(s, (struct sockaddr *)&addr, &addrlen);
166: close(s);
167: /*
168: * Connect to the socket
169: * XXX If any of these fail, we're in trouble!
170: */
1.1.1.6 root 171: s = qemu_socket(AF_INET, SOCK_STREAM, 0);
1.1 root 172: addr.sin_addr = loopback_addr;
173: do {
174: ret = connect(s, (struct sockaddr *)&addr, addrlen);
175: } while (ret < 0 && errno == EINTR);
176: }
1.1.1.3 root 177:
1.1 root 178: dup2(s, 0);
179: dup2(s, 1);
180: dup2(s, 2);
1.1.1.3 root 181: for (s = getdtablesize() - 1; s >= 3; s--)
1.1 root 182: close(s);
1.1.1.3 root 183:
1.1 root 184: i = 0;
1.1.1.11! root 185: bptr = g_strdup(ex); /* No need to free() this */
1.1 root 186: if (do_pty == 1) {
187: /* Setup "slirp.telnetd -x" */
188: argv[i++] = "slirp.telnetd";
189: argv[i++] = "-x";
190: argv[i++] = bptr;
191: } else
192: do {
193: /* Change the string into argv[] */
194: curarg = bptr;
195: while (*bptr != ' ' && *bptr != (char)0)
196: bptr++;
197: c = *bptr;
198: *bptr++ = (char)0;
199: argv[i++] = strdup(curarg);
200: } while (c);
1.1.1.3 root 201:
1.1.1.5 root 202: argv[i] = NULL;
1.1.1.4 root 203: execvp(argv[0], (char **)argv);
1.1.1.3 root 204:
1.1 root 205: /* Ooops, failed, let's tell the user why */
1.1.1.8 root 206: fprintf(stderr, "Error: execvp of %s failed: %s\n",
207: argv[0], strerror(errno));
1.1 root 208: close(0); close(1); close(2); /* XXX */
209: exit(1);
1.1.1.3 root 210:
1.1 root 211: default:
1.1.1.10 root 212: qemu_add_child_watch(pid);
1.1 root 213: if (do_pty == 2) {
214: close(s);
215: so->s = master;
216: } else {
217: /*
218: * XXX this could block us...
219: * XXX Should set a timer here, and if accept() doesn't
220: * return after X seconds, declare it a failure
221: * The only reason this will block forever is if socket()
222: * of connect() fail in the child process
223: */
224: do {
225: so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
226: } while (so->s < 0 && errno == EINTR);
227: closesocket(s);
228: opt = 1;
229: setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
230: opt = 1;
231: setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
232: }
233: fd_nonblock(so->s);
1.1.1.3 root 234:
1.1 root 235: /* Append the telnet options now */
1.1.1.5 root 236: if (so->so_m != NULL && do_pty == 1) {
1.1 root 237: sbappend(so, so->so_m);
1.1.1.5 root 238: so->so_m = NULL;
1.1 root 239: }
1.1.1.3 root 240:
1.1 root 241: return 1;
242: }
243: }
244: #endif
245:
246: #ifndef HAVE_STRDUP
247: char *
248: strdup(str)
249: const char *str;
250: {
251: char *bptr;
1.1.1.3 root 252:
1.1 root 253: bptr = (char *)malloc(strlen(str)+1);
254: strcpy(bptr, str);
1.1.1.3 root 255:
1.1 root 256: return bptr;
257: }
258: #endif
259:
1.1.1.5 root 260: #include "monitor.h"
1.1.1.3 root 261:
262: void lprint(const char *format, ...)
263: {
264: va_list args;
265:
266: va_start(args, format);
1.1.1.8 root 267: monitor_vprintf(default_mon, format, args);
1.1.1.3 root 268: va_end(args);
269: }
1.1 root 270:
271: void
1.1.1.5 root 272: u_sleep(int usec)
1.1 root 273: {
274: struct timeval t;
275: fd_set fdset;
1.1.1.3 root 276:
1.1 root 277: FD_ZERO(&fdset);
1.1.1.3 root 278:
1.1 root 279: t.tv_sec = 0;
280: t.tv_usec = usec * 1000;
1.1.1.3 root 281:
1.1 root 282: select(0, &fdset, &fdset, &fdset, &t);
283: }
284:
285: /*
286: * Set fd blocking and non-blocking
287: */
288:
289: void
1.1.1.5 root 290: fd_nonblock(int fd)
1.1 root 291: {
292: #ifdef FIONBIO
1.1.1.5 root 293: #ifdef _WIN32
294: unsigned long opt = 1;
295: #else
296: int opt = 1;
297: #endif
1.1.1.3 root 298:
1.1 root 299: ioctlsocket(fd, FIONBIO, &opt);
300: #else
301: int opt;
1.1.1.3 root 302:
1.1 root 303: opt = fcntl(fd, F_GETFL, 0);
304: opt |= O_NONBLOCK;
305: fcntl(fd, F_SETFL, opt);
306: #endif
307: }
308:
309: void
1.1.1.5 root 310: fd_block(int fd)
1.1 root 311: {
312: #ifdef FIONBIO
1.1.1.5 root 313: #ifdef _WIN32
314: unsigned long opt = 0;
315: #else
1.1 root 316: int opt = 0;
1.1.1.5 root 317: #endif
1.1.1.3 root 318:
1.1 root 319: ioctlsocket(fd, FIONBIO, &opt);
320: #else
321: int opt;
1.1.1.3 root 322:
1.1 root 323: opt = fcntl(fd, F_GETFL, 0);
324: opt &= ~O_NONBLOCK;
325: fcntl(fd, F_SETFL, opt);
326: #endif
327: }
328:
1.1.1.5 root 329: void slirp_connection_info(Slirp *slirp, Monitor *mon)
1.1 root 330: {
1.1.1.5 root 331: const char * const tcpstates[] = {
332: [TCPS_CLOSED] = "CLOSED",
333: [TCPS_LISTEN] = "LISTEN",
334: [TCPS_SYN_SENT] = "SYN_SENT",
335: [TCPS_SYN_RECEIVED] = "SYN_RCVD",
336: [TCPS_ESTABLISHED] = "ESTABLISHED",
337: [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
338: [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
339: [TCPS_CLOSING] = "CLOSING",
340: [TCPS_LAST_ACK] = "LAST_ACK",
341: [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
342: [TCPS_TIME_WAIT] = "TIME_WAIT",
343: };
344: struct in_addr dst_addr;
345: struct sockaddr_in src;
346: socklen_t src_len;
347: uint16_t dst_port;
348: struct socket *so;
349: const char *state;
350: char buf[20];
351: int n;
352:
353: monitor_printf(mon, " Protocol[State] FD Source Address Port "
354: "Dest. Address Port RecvQ SendQ\n");
355:
356: for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
357: if (so->so_state & SS_HOSTFWD) {
358: state = "HOST_FORWARD";
359: } else if (so->so_tcpcb) {
360: state = tcpstates[so->so_tcpcb->t_state];
361: } else {
362: state = "NONE";
1.1 root 363: }
1.1.1.5 root 364: if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
365: src_len = sizeof(src);
366: getsockname(so->s, (struct sockaddr *)&src, &src_len);
367: dst_addr = so->so_laddr;
368: dst_port = so->so_lport;
369: } else {
370: src.sin_addr = so->so_laddr;
371: src.sin_port = so->so_lport;
372: dst_addr = so->so_faddr;
373: dst_port = so->so_fport;
1.1 root 374: }
1.1.1.5 root 375: n = snprintf(buf, sizeof(buf), " TCP[%s]", state);
376: memset(&buf[n], ' ', 19 - n);
377: buf[19] = 0;
378: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
379: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
380: ntohs(src.sin_port));
381: monitor_printf(mon, "%15s %5d %5d %5d\n",
382: inet_ntoa(dst_addr), ntohs(dst_port),
383: so->so_rcv.sb_cc, so->so_snd.sb_cc);
384: }
1.1.1.3 root 385:
1.1.1.5 root 386: for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
387: if (so->so_state & SS_HOSTFWD) {
388: n = snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
389: src_len = sizeof(src);
390: getsockname(so->s, (struct sockaddr *)&src, &src_len);
391: dst_addr = so->so_laddr;
392: dst_port = so->so_lport;
393: } else {
394: n = snprintf(buf, sizeof(buf), " UDP[%d sec]",
395: (so->so_expire - curtime) / 1000);
396: src.sin_addr = so->so_laddr;
397: src.sin_port = so->so_lport;
398: dst_addr = so->so_faddr;
399: dst_port = so->so_fport;
400: }
401: memset(&buf[n], ' ', 19 - n);
402: buf[19] = 0;
403: monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
404: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
405: ntohs(src.sin_port));
406: monitor_printf(mon, "%15s %5d %5d %5d\n",
407: inet_ntoa(dst_addr), ntohs(dst_port),
408: so->so_rcv.sb_cc, so->so_snd.sb_cc);
409: }
1.1.1.10 root 410:
411: for (so = slirp->icmp.so_next; so != &slirp->icmp; so = so->so_next) {
412: n = snprintf(buf, sizeof(buf), " ICMP[%d sec]",
413: (so->so_expire - curtime) / 1000);
414: src.sin_addr = so->so_laddr;
415: dst_addr = so->so_faddr;
416: memset(&buf[n], ' ', 19 - n);
417: buf[19] = 0;
418: monitor_printf(mon, "%s %3d %15s - ", buf, so->s,
419: src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*");
420: monitor_printf(mon, "%15s - %5d %5d\n", inet_ntoa(dst_addr),
421: so->so_rcv.sb_cc, so->so_snd.sb_cc);
422: }
1.1 root 423: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.