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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /erts/etc/unix/setuid_socket_wrap.c
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The R13B03 release.OTP_R13B03
Diffstat (limited to 'erts/etc/unix/setuid_socket_wrap.c')
-rw-r--r--erts/etc/unix/setuid_socket_wrap.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/erts/etc/unix/setuid_socket_wrap.c b/erts/etc/unix/setuid_socket_wrap.c
new file mode 100644
index 0000000000..3f0657770c
--- /dev/null
+++ b/erts/etc/unix/setuid_socket_wrap.c
@@ -0,0 +1,259 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1999-2009. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+/*
+ * setuid_socket_wrap.c
+ *
+ * ./a.out [-s [tag,][addr]:[port]]* [-d [tag,][addr]:[port]]*
+ * [-r [tag,]proto]* -- program args
+ *
+ * Where: -s = stream socket, -d datagram socket and -r means raw socket.
+ *
+ */
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifndef EXEC_PROGRAM
+# define EXEC_PROGRAM "/bin/echo"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#ifndef INADDR_NONE
+#define INADDR_NONE 0xffffffff
+#endif
+
+struct sock_list {
+ struct sock_list *next;
+ int fd;
+ int type;
+ int protocol;
+ struct sockaddr_in addr;
+ char *arg;
+};
+
+int parse_addr(addr, str)
+ struct sockaddr_in *addr;
+ char *str;
+{
+ int port = 0;
+ char *cp;
+ struct hostent *hp;
+ struct servent *se;
+
+ if ((cp = strrchr(str, (int)':')) != NULL)
+ *cp++ = '\0';
+ if (cp) {
+ if (!isdigit((int)cp[0])) {
+ if ((se = getservbyname(cp, "tcp")) != NULL) {
+ port = ntohs(se->s_port);
+ } else {
+ fprintf(stderr, "unknown port %s\n", cp);
+ return -1;
+ }
+ } else {
+ port = atoi(cp);
+ }
+ }
+ if (port < 0 || port > 0xffff) {
+ fprintf(stderr, "bad port number %d\n", port);
+ return -1;
+ }
+
+ bzero(addr, sizeof(*addr));
+ addr->sin_family = AF_INET;
+ addr->sin_port = htons(port);
+ if (*str == '\000') {
+ addr->sin_addr.s_addr = INADDR_ANY;
+ } else {
+ if ((addr->sin_addr.s_addr = inet_addr(str)) == INADDR_NONE) {
+ if ((hp = gethostbyname(str)) == NULL) {
+ fprintf(stderr, "\"%s\" unknown host or address!\n", str);
+ return -1;
+ } else {
+ bcopy(hp->h_addr_list[0], &addr->sin_addr.s_addr,hp->h_length);
+ }
+ }
+ }
+ return 0;
+}
+
+struct sock_list *new_entry(type, argstr)
+ int type;
+ char *argstr;
+{
+ struct sock_list *sle;
+ char *cp;
+
+ sle = (struct sock_list *)malloc(sizeof(struct sock_list));
+ if (!sle)
+ return NULL;
+ sle->next = NULL;
+ sle->fd = -1;
+
+ if ((cp = strchr(argstr, (int)',')) != NULL) {
+ *cp++ = '\0';
+ sle->arg = argstr;
+ argstr = cp;
+ } else {
+ sle->arg = "-fd";
+ }
+ sle->type = type;
+ switch (type) {
+ case SOCK_RAW: {
+ struct protoent *pe;
+ pe = getprotobyname(argstr);
+ if (!pe) {
+ fprintf(stderr, "Unknown protocol: %s\n", argstr);
+ free(sle);
+ return NULL;
+ }
+ sle->protocol = pe->p_proto;
+ break;
+ }
+ case SOCK_STREAM:
+ case SOCK_DGRAM:
+ sle->protocol = 0;
+ if (parse_addr(&sle->addr, argstr) < 0) {
+ free(sle);
+ return NULL;
+ }
+ break;
+ }
+ return sle;
+}
+
+int open_socket(sle)
+ struct sock_list *sle;
+{
+ sle->fd = socket(AF_INET, sle->type, sle->protocol);
+ if (sle->fd < 0) {
+ perror("socket");
+ return -1;
+ }
+ if (sle->type != SOCK_RAW) {
+#if 0
+ printf("binding fd %d to %s:%d\n", sle->fd,
+ inet_ntoa(sle->addr.sin_addr), ntohs(sle->addr.sin_port));
+#endif
+ if (bind(sle->fd, (struct sockaddr *)&sle->addr, sizeof(sle->addr))<0){
+ perror("bind");
+ close(sle->fd);
+ return -1;
+ }
+ }
+ return sle->fd;
+}
+
+int main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ struct sock_list *sl = NULL, *sltmp = NULL;
+ int count = 0;
+ int c;
+
+ while ((c = getopt(argc, argv, "s:d:r:")) != EOF)
+ switch (c) {
+ case 's':
+ sltmp = new_entry(SOCK_STREAM, optarg);
+ if (!sltmp) {
+ exit(1);
+ }
+ sltmp->next = sl;
+ sl = sltmp;
+ count++;
+ break;
+ case 'd':
+ sltmp = new_entry(SOCK_DGRAM, optarg);
+ if (!sltmp) {
+ exit(1);
+ }
+ sltmp->next = sl;
+ sl = sltmp;
+ count++;
+ break;
+ case 'r':
+ sltmp = new_entry(SOCK_RAW, optarg);
+ if (!sltmp) {
+ exit(1);
+ }
+ sltmp->next = sl;
+ sl = sltmp;
+ count++;
+ break;
+ default:
+ exit(1);
+ }
+ argc -= optind;
+ argv += optind;
+
+ for(sltmp = sl; sltmp != NULL; sltmp = sltmp->next)
+ if (open_socket(sltmp) < 0) {
+ fprintf(stderr, "failed to create socket!\n");
+ exit(1);
+ }
+
+ setuid(getuid());
+
+ {
+ int i;
+ char **newargv;
+ char *run_prog = EXEC_PROGRAM;
+ char *run_prog_name;
+
+ newargv = (char **)malloc((1 + 2*count + argc + 1) * sizeof(char*));
+
+ if ((run_prog_name = strrchr(run_prog, (int)'/')) == NULL)
+ run_prog_name = run_prog;
+ else
+ run_prog_name++;
+
+ i = 0;
+ newargv[i++] = run_prog_name;
+
+ for (; argc; argc--, argv++, i++)
+ newargv[i] = *argv;
+ for(sltmp = sl; sltmp != NULL; ) {
+ char *fd_str = (char *)malloc(8);
+ if (!fd_str) exit(1);
+ sprintf(fd_str, "%d", sltmp->fd);
+ if (sltmp->arg && *(sltmp->arg))
+ newargv[i++] = sltmp->arg;
+ newargv[i++] = fd_str;
+ sl = sltmp;
+ sltmp = sltmp->next;
+ free(sl);
+ }
+ newargv[i] = (char *)NULL;
+ execv(run_prog, newargv);
+ perror("exec");
+ exit(1);
+ }
+ exit(0);
+}