e8ddc0f46e
- For security reasons move some libc code to PFS. - Fix a few bugs in PFS. Contributed by Thomas Cort.
134 lines
2.7 KiB
C
134 lines
2.7 KiB
C
#undef NDEBUG
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#include <errno.h>
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#include <net/ioctl.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#define DEBUG 0
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static ssize_t _uds_sendmsg_conn(int socket, const struct msghdr *msg,
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int flags);
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static ssize_t _uds_sendmsg_dgram(int socket, const struct msghdr *msg,
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int flags);
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ssize_t sendmsg(int socket, const struct msghdr *msg, int flags)
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{
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int r;
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int uds_sotype;
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if (msg == NULL) {
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errno= EFAULT;
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return -1;
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}
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r= ioctl(socket, NWIOGUDSSOTYPE, &uds_sotype);
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if (r != -1 || (errno != ENOTTY && errno != EBADIOCTL)) {
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if (r == -1) {
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return r;
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}
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if (uds_sotype == SOCK_DGRAM) {
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return _uds_sendmsg_dgram(socket, msg, flags);
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} else {
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return _uds_sendmsg_conn(socket, msg, flags);
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}
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}
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#if DEBUG
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fprintf(stderr, "sendmsg: not implemented for fd %d\n", socket);
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#endif
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errno= ENOSYS;
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return -1;
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}
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static ssize_t _uds_sendmsg_conn(int socket, const struct msghdr *msg,
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int flags)
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{
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struct msg_control msg_ctrl;
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int r;
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if (flags != 0) {
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#if DEBUG
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fprintf(stderr, "sendmsg(uds): flags not implemented\n");
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#endif
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errno= ENOSYS;
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return -1;
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}
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/* grab the control data */
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memset(&msg_ctrl, '\0', sizeof(struct msg_control));
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if (msg->msg_controllen > MSG_CONTROL_MAX) {
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errno = ENOMEM;
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return -1;
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} else if (msg->msg_controllen > 0) {
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memcpy(&msg_ctrl.msg_control, msg->msg_control,
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msg->msg_controllen);
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}
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msg_ctrl.msg_controllen = msg->msg_controllen;
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/* send the control data to PFS */
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r= ioctl(socket, NWIOSUDSCTRL, (void *) &msg_ctrl);
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if (r == -1) {
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return r;
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}
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/* Silently ignore destination, if given. */
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return writev(socket, msg->msg_iov, msg->msg_iovlen);
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}
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static ssize_t _uds_sendmsg_dgram(int socket, const struct msghdr *msg,
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int flags)
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{
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struct msg_control msg_ctrl;
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struct sockaddr_un *dest_addr;
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int i, r;
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if (flags != 0) {
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#if DEBUG
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fprintf(stderr, "sendmsg(uds): flags not implemented\n");
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#endif
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errno= ENOSYS;
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return -1;
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}
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dest_addr = msg->msg_name;
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if (dest_addr == NULL) {
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errno= EFAULT;
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return -1;
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}
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/* set the target address */
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r= ioctl(socket, NWIOSUDSTADDR, (void *) dest_addr);
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if (r == -1) {
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return r;
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}
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/* grab the control data */
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memset(&msg_ctrl, '\0', sizeof(struct msg_control));
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if (msg->msg_controllen > MSG_CONTROL_MAX) {
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errno = ENOMEM;
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return -1;
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} else if (msg->msg_controllen > 0) {
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memcpy(&msg_ctrl.msg_control, msg->msg_control,
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msg->msg_controllen);
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}
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msg_ctrl.msg_controllen = msg->msg_controllen;
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/* send the control data to PFS */
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r= ioctl(socket, NWIOSUDSCTRL, (void *) &msg_ctrl);
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if (r == -1) {
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return r;
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}
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/* do the send */
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return writev(socket, msg->msg_iov, msg->msg_iovlen);
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}
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