X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=net.c;h=d4472c0e2805ecb898ef4caae85a96980fe6d447;hp=e897645167d86a45f454d4ef213fc198d7f8ecd1;hb=ff067f37f441537ffec6ef4ee86420ebae727f9a;hpb=f7bcc2f6c96ef5c42ad4038daea3fb323680e3f5

diff --git a/net.c b/net.c
index e8976451..d4472c0e 100644
--- a/net.c
+++ b/net.c
@@ -20,13 +20,14 @@
 
 #include "para.h"
 #include "net.h"
+#include "string.h"
 #include <netdb.h>
 #include "error.h"
-#include "string.h"
 
 extern void (*crypt_function_recv)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
 extern void (*crypt_function_send)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
 
+
 /**
  * initialize a struct sockaddr_in
  * @param addr A pointer to the struct to be initialized
@@ -130,7 +131,7 @@ int send_buffer(int fd, const char *buf)
  *
  * @return Positive on success, \p -E_SEND on errors.
  */
-__printf_2_3 int send_va_buffer(int fd, char *fmt, ...)
+__printf_2_3 int send_va_buffer(int fd, const char *fmt, ...)
 {
 	char *msg;
 	int ret;
@@ -188,8 +189,11 @@ int recv_buffer(int fd, char *buf, ssize_t size)
 {
 	int n;
 
-	if ((n = recv_bin_buffer(fd, buf, size - 1)) >= 0)
+	n = recv_bin_buffer(fd, buf, size - 1);
+	if (n >= 0)
 		buf[n] = '\0';
+	else
+		*buf = '\0';
 	return n;
 }
 
@@ -331,6 +335,19 @@ int create_pf_socket(const char *name, struct sockaddr_un *unix_addr, int mode)
 	return fd;
 }
 
+#ifndef HAVE_UCRED
+	struct ucred {
+	uid_t uid, pid, gid;
+};
+ssize_t send_cred_buffer(int sock, char *buf)
+{
+	return send_buffer(sock, buf);
+}
+int recv_cred_buffer(int fd, char *buf, size_t size)
+{
+	return recv_buffer(fd, buf, size) > 0? 1 : -E_RECVMSG;
+}
+#else /* HAVE_UCRED */
 /**
  * send NULL terminated buffer and Unix credentials of the current process
  *
@@ -390,19 +407,21 @@ static void dispose_fds(int *fds, int num)
  * \param fd the socket file descriptor
  * \param buf the buffer to store the message
  * \param size the size of \a buffer
- * \param cred the credentials are returned here
+ *
+ * \return negative on errors, the user id on success.
  *
  * \sa okir's Black Hats Manual
  * \sa recvmsg(2)
  */
-int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
+int recv_cred_buffer(int fd, char *buf, size_t size)
 {
 	char control[255];
 	struct msghdr msg;
 	struct cmsghdr *cmsg;
 	struct iovec iov;
-	int result;
+	int result = 0;
 	int yes = 1;
+	struct ucred cred;
 
 	setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &yes, sizeof(int));
 	memset(&msg, 0, sizeof(msg));
@@ -415,13 +434,13 @@ int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
 	msg.msg_controllen = sizeof(control);
 	if (recvmsg(fd, &msg, 0) < 0)
 		return -E_RECVMSG;
-	result = -SCM_CREDENTIALS;
+	result = -E_SCM_CREDENTIALS;
 	cmsg = CMSG_FIRSTHDR(&msg);
 	while (cmsg) {
 		if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type
 				== SCM_CREDENTIALS) {
-			memcpy(cred, CMSG_DATA(cmsg), sizeof(struct ucred));
-			result = iov.iov_len;
+			memcpy(&cred, CMSG_DATA(cmsg), sizeof(struct ucred));
+			result = cred.uid;
 		} else
 			if (cmsg->cmsg_level == SOL_SOCKET
 					&& cmsg->cmsg_type == SCM_RIGHTS) {
@@ -433,6 +452,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
 	}
 	return result;
 }
+#endif /* HAVE_UCRED */
 
 /** how many pending connections queue will hold */
 #define BACKLOG 10
@@ -444,7 +464,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
  * \return The file descriptor of the created socket, negative
  * on errors.
  *
- * \sa  get_socket()
+ * \sa get_socket()
  * \sa setsockopt(2)
  * \sa bind(2)
  * \sa listen(2)
@@ -493,11 +513,12 @@ int recv_pattern(int fd, const char *pattern, size_t bufsize)
 
 	if (n < len)
 		goto out;
-	buf[n] = '\0';
 	if (strncasecmp(buf, pattern, len))
 		goto out;
 	ret = 1;
 out:
+	if (ret < 0)
+		PARA_NOTICE_LOG("did not receive pattern '%s'\n", pattern);
 	free(buf);
 	return ret;
 }