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authorTed Gould <ted@gould.cx>2012-08-30 10:20:59 -0500
committerTed Gould <ted@gould.cx>2012-08-30 10:20:59 -0500
commitc8bbce31973ad6a2c86549f88b7cae4286e1be20 (patch)
treed2536ef293814c9cc6335e8f7d2473ee21572b21 /src
parent0da41281822ae09674487a921d32a3ba29d76820 (diff)
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Move the socket creation into the fork'd function
Diffstat (limited to 'src')
-rw-r--r--src/pam-freerdp.c80
1 files changed, 40 insertions, 40 deletions
diff --git a/src/pam-freerdp.c b/src/pam-freerdp.c
index 4e43ec4..1aab5dd 100644
--- a/src/pam-freerdp.c
+++ b/src/pam-freerdp.c
@@ -250,17 +250,45 @@ done:
}
static int
-session_socket_handler (const char * buffer, int buffer_len, struct passwd * pwdent, int socketfd)
+session_socket_handler (const char * buffer, int buffer_len, struct passwd * pwdent)
{
- /* Locks to carry over */
- mlock(buffer, buffer_len);
-
if (setgid(pwdent->pw_gid) < 0 || setuid(pwdent->pw_uid) < 0 ||
setegid(pwdent->pw_gid) < 0 || seteuid(pwdent->pw_uid) < 0) {
return EXIT_FAILURE;
}
+ /* Make our socket and bind it */
+ int socketfd;
+ struct sockaddr_un socket_addr;
+
+ socketfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (socketfd < 0) {
+ return EXIT_FAILURE;
+ }
+
+ memset(&socket_addr, 0, sizeof(struct sockaddr_un));
+ socket_addr.sun_family = AF_UNIX;
+ strncpy(socket_addr.sun_path, pwdent->pw_dir, sizeof(socket_addr.sun_path) - 1);
+ strncpy(socket_addr.sun_path + strlen(pwdent->pw_dir), "/.freerdp-socket", (sizeof(socket_addr.sun_path) - strlen(pwdent->pw_dir)) - 1);
+
+ /* We bind the socket before forking so that we ensure that
+ there isn't a race condition to get to it. Things will block
+ otherwise. */
+ if (bind(socketfd, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_un)) < 0) {
+ close(socketfd);
+ return EXIT_FAILURE;
+ }
+
+ /* Set the socket file permissions to be 600 and the user and group
+ to be the guest user. NOTE: This won't protect on BSD */
+ if (chmod(socket_addr.sun_path, S_IRUSR | S_IWUSR) != 0 ||
+ chown(socket_addr.sun_path, pwdent->pw_uid, pwdent->pw_gid) != 0) {
+ close(socketfd);
+ return EXIT_FAILURE;
+ }
+
if (listen(socketfd, 1) < 0) {
+ close(socketfd);
return EXIT_FAILURE;
}
@@ -271,12 +299,14 @@ session_socket_handler (const char * buffer, int buffer_len, struct passwd * pwd
connected_addr_size = sizeof(struct sockaddr_un);
connectfd = accept(socketfd, (struct sockaddr *)&connected_addr, &connected_addr_size);
if (connectfd < 0) {
+ close(socketfd);
return EXIT_FAILURE;
}
int writedata;
writedata = write(connectfd, buffer, buffer_len);
+ close(socketfd);
close(connectfd);
if (writedata == buffer_len) {
@@ -319,39 +349,6 @@ pam_sm_open_session (pam_handle_t *pamh, int flags, int argc, const char ** argv
goto done;
}
- /* Make our socket and bind it */
- int socketfd;
- struct sockaddr_un socket_addr;
-
- socketfd = socket(AF_UNIX, SOCK_STREAM, 0);
- if (socketfd < 0) {
- retval = PAM_SYSTEM_ERR;
- goto done;
- }
-
- memset(&socket_addr, 0, sizeof(struct sockaddr_un));
- socket_addr.sun_family = AF_UNIX;
- strncpy(socket_addr.sun_path, pwdent->pw_dir, sizeof(socket_addr.sun_path) - 1);
- strncpy(socket_addr.sun_path + strlen(pwdent->pw_dir), "/.freerdp-socket", (sizeof(socket_addr.sun_path) - strlen(pwdent->pw_dir)) - 1);
-
- /* We bind the socket before forking so that we ensure that
- there isn't a race condition to get to it. Things will block
- otherwise. */
- if (bind(socketfd, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_un)) < 0) {
- close(socketfd);
- retval = PAM_SYSTEM_ERR;
- goto done;
- }
-
- /* Set the socket file permissions to be 600 and the user and group
- to be the guest user. NOTE: This won't protect on BSD */
- if (chmod(socket_addr.sun_path, S_IRUSR | S_IWUSR) != 0 ||
- chown(socket_addr.sun_path, pwdent->pw_uid, pwdent->pw_gid) != 0) {
- close(socketfd);
- retval = PAM_SYSTEM_ERR;
- goto done;
- }
-
/* Build this up as a buffer so we can just write it and see that
very, very clearly */
int buffer_len = 0;
@@ -369,15 +366,18 @@ pam_sm_open_session (pam_handle_t *pamh, int flags, int argc, const char ** argv
if (pid == 0) {
int retval = 0;
- retval = session_socket_handler(buffer, buffer_len, pwdent, socketfd);
+ /* Locks to carry over */
+ mlock(buffer, buffer_len);
- close(socketfd);
+ retval = session_socket_handler(buffer, buffer_len, pwdent);
+
+ munlock(buffer, buffer_len);
+ memset(buffer, 0, buffer_len);
free(buffer);
_exit(retval);
} else if (pid < 0) {
retval = PAM_SYSTEM_ERR;
- close(socketfd);
} else {
session_pid = pid;
}