From eb8dd9dca1228af0cd132f515509051ecfabf6f6 Mon Sep 17 00:00:00 2001 From: cvs2svn Date: Mon, 14 Apr 2025 17:32:06 +0000 Subject: This commit was manufactured by cvs2git to create tag 'tb_20250414'. --- src/lib/libc/net/rcmd.c | 296 ------------------------------------------------ 1 file changed, 296 deletions(-) delete mode 100644 src/lib/libc/net/rcmd.c (limited to 'src/lib/libc/net/rcmd.c') diff --git a/src/lib/libc/net/rcmd.c b/src/lib/libc/net/rcmd.c deleted file mode 100644 index bf68603649..0000000000 --- a/src/lib/libc/net/rcmd.c +++ /dev/null @@ -1,296 +0,0 @@ -/* - * Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved. - * Copyright (c) 1983, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include -#include - -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -int -rcmd(char **ahost, int rport, const char *locuser, const char *remuser, - const char *cmd, int *fd2p) -{ - return rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, AF_INET); -} - -int -rcmd_af(char **ahost, int porta, const char *locuser, const char *remuser, - const char *cmd, int *fd2p, int af) -{ - static char hbuf[HOST_NAME_MAX+1]; - char pbuf[NI_MAXSERV]; - struct addrinfo hints, *res, *r; - int error; - struct sockaddr_storage from; - sigset_t oldmask, mask; - pid_t pid; - int s, lport; - struct timespec timo; - char c, *p; - int refused; - in_port_t rport = porta; - int numread; - - /* call rcmdsh() with specified remote shell if appropriate. */ - if (!issetugid() && (p = getenv("RSH")) && *p) { - struct servent *sp = getservbyname("shell", "tcp"); - - if (sp && sp->s_port == rport) - return (rcmdsh(ahost, rport, locuser, remuser, - cmd, p)); - } - - /* use rsh(1) if non-root and remote port is shell. */ - if (geteuid()) { - struct servent *sp = getservbyname("shell", "tcp"); - - if (sp && sp->s_port == rport) - return (rcmdsh(ahost, rport, locuser, remuser, - cmd, NULL)); - } - - pid = getpid(); - snprintf(pbuf, sizeof(pbuf), "%u", ntohs(rport)); - memset(&hints, 0, sizeof(hints)); - hints.ai_family = af; - hints.ai_socktype = SOCK_STREAM; - hints.ai_flags = AI_CANONNAME; - error = getaddrinfo(*ahost, pbuf, &hints, &res); - if (error) { - (void)fprintf(stderr, "rcmd: %s: %s\n", *ahost, - gai_strerror(error)); - return (-1); - } - if (res->ai_canonname) { - strlcpy(hbuf, res->ai_canonname, sizeof(hbuf)); - *ahost = hbuf; - } else - ; /*XXX*/ - - r = res; - refused = 0; - timespecclear(&timo); - sigemptyset(&mask); - sigaddset(&mask, SIGURG); - sigprocmask(SIG_BLOCK, &mask, &oldmask); - for (timo.tv_sec = 1, lport = IPPORT_RESERVED - 1;;) { - s = rresvport_af(&lport, r->ai_family); - if (s < 0) { - if (errno == EAGAIN) - (void)fprintf(stderr, - "rcmd: socket: All ports in use\n"); - else - (void)fprintf(stderr, "rcmd: socket: %s\n", - strerror(errno)); - if (r->ai_next) { - r = r->ai_next; - continue; - } else { - sigprocmask(SIG_SETMASK, &oldmask, NULL); - freeaddrinfo(res); - return (-1); - } - } - fcntl(s, F_SETOWN, pid); - if (connect(s, r->ai_addr, r->ai_addrlen) >= 0) - break; - (void)close(s); - if (errno == EADDRINUSE) { - lport--; - continue; - } - if (errno == ECONNREFUSED) - refused++; - if (r->ai_next) { - int oerrno = errno; - char hbuf[NI_MAXHOST]; - const int niflags = NI_NUMERICHOST; - - hbuf[0] = '\0'; - if (getnameinfo(r->ai_addr, r->ai_addrlen, - hbuf, sizeof(hbuf), NULL, 0, niflags) != 0) - strlcpy(hbuf, "(invalid)", sizeof hbuf); - (void)fprintf(stderr, "connect to address %s: ", hbuf); - errno = oerrno; - perror(0); - r = r->ai_next; - hbuf[0] = '\0'; - if (getnameinfo(r->ai_addr, r->ai_addrlen, - hbuf, sizeof(hbuf), NULL, 0, niflags) != 0) - strlcpy(hbuf, "(invalid)", sizeof hbuf); - (void)fprintf(stderr, "Trying %s...\n", hbuf); - continue; - } - if (refused && timo.tv_sec <= 16) { - (void)nanosleep(&timo, NULL); - timo.tv_sec *= 2; - r = res; - refused = 0; - continue; - } - (void)fprintf(stderr, "%s: %s\n", res->ai_canonname, - strerror(errno)); - sigprocmask(SIG_SETMASK, &oldmask, NULL); - freeaddrinfo(res); - return (-1); - } - /* given "af" can be PF_UNSPEC, we need the real af for "s" */ - af = r->ai_family; - freeaddrinfo(res); - if (fd2p == 0) { - write(s, "", 1); - lport = 0; - } else { - struct pollfd pfd[2]; - char num[8]; - int s2 = rresvport_af(&lport, af), s3; - socklen_t len = sizeof(from); - - if (s2 < 0) - goto bad; - - listen(s2, 1); - (void)snprintf(num, sizeof(num), "%d", lport); - if (write(s, num, strlen(num)+1) != strlen(num)+1) { - (void)fprintf(stderr, - "rcmd: write (setting up stderr): %s\n", - strerror(errno)); - (void)close(s2); - goto bad; - } -again: - pfd[0].fd = s; - pfd[0].events = POLLIN; - pfd[1].fd = s2; - pfd[1].events = POLLIN; - - errno = 0; - if (poll(pfd, 2, INFTIM) < 1 || - (pfd[1].revents & (POLLIN|POLLHUP)) == 0) { - if (errno != 0) - (void)fprintf(stderr, - "rcmd: poll (setting up stderr): %s\n", - strerror(errno)); - else - (void)fprintf(stderr, - "poll: protocol failure in circuit setup\n"); - (void)close(s2); - goto bad; - } - s3 = accept(s2, (struct sockaddr *)&from, &len); - if (s3 < 0) { - (void)fprintf(stderr, - "rcmd: accept: %s\n", strerror(errno)); - lport = 0; - close(s2); - goto bad; - } - - /* - * XXX careful for ftp bounce attacks. If discovered, shut them - * down and check for the real auxiliary channel to connect. - */ - switch (from.ss_family) { - case AF_INET: - case AF_INET6: - if (getnameinfo((struct sockaddr *)&from, len, - NULL, 0, num, sizeof(num), NI_NUMERICSERV) == 0 && - atoi(num) != 20) { - break; - } - close(s3); - goto again; - default: - break; - } - (void)close(s2); - - *fd2p = s3; - switch (from.ss_family) { - case AF_INET: - case AF_INET6: - if (getnameinfo((struct sockaddr *)&from, len, - NULL, 0, num, sizeof(num), NI_NUMERICSERV) != 0 || - (atoi(num) >= IPPORT_RESERVED || - atoi(num) < IPPORT_RESERVED / 2)) { - (void)fprintf(stderr, - "socket: protocol failure in circuit setup.\n"); - goto bad2; - } - break; - default: - break; - } - } - (void)write(s, locuser, strlen(locuser)+1); - (void)write(s, remuser, strlen(remuser)+1); - (void)write(s, cmd, strlen(cmd)+1); - if ((numread = read(s, &c, 1)) != 1) { - (void)fprintf(stderr, - "rcmd: %s: %s\n", *ahost, - numread == -1 ? strerror(errno) : "Short read"); - goto bad2; - } - if (c != 0) { - while (read(s, &c, 1) == 1) { - (void)write(STDERR_FILENO, &c, 1); - if (c == '\n') - break; - } - goto bad2; - } - sigprocmask(SIG_SETMASK, &oldmask, NULL); - return (s); -bad2: - if (lport) - (void)close(*fd2p); -bad: - (void)close(s); - sigprocmask(SIG_SETMASK, &oldmask, NULL); - return (-1); -} -DEF_WEAK(rcmd_af); - -- cgit v1.2.3-55-g6feb