135 lines
2.8 KiB
C
135 lines
2.8 KiB
C
#include <sys/cdefs.h>
|
|
#include "namespace.h"
|
|
|
|
#undef NDEBUG
|
|
|
|
#include <errno.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/ioc_net.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/types.h>
|
|
#include <sys/un.h>
|
|
|
|
#define DEBUG 0
|
|
|
|
static ssize_t _uds_recvmsg_conn(int sock, struct msghdr *msg, int flags);
|
|
static ssize_t _uds_recvmsg_dgram(int sock, struct msghdr *msg, int flags);
|
|
|
|
ssize_t recvmsg(int sock, struct msghdr *msg, int flags)
|
|
{
|
|
int r;
|
|
int uds_sotype;
|
|
|
|
if (msg == NULL) {
|
|
errno= EFAULT;
|
|
return -1;
|
|
}
|
|
|
|
r= ioctl(sock, NWIOGUDSSOTYPE, &uds_sotype);
|
|
if (r != -1 || errno != ENOTTY) {
|
|
if (r == -1) {
|
|
return r;
|
|
}
|
|
|
|
if (uds_sotype == SOCK_DGRAM) {
|
|
return _uds_recvmsg_dgram(sock, msg, flags);
|
|
} else {
|
|
return _uds_recvmsg_conn(sock, msg, flags);
|
|
}
|
|
}
|
|
|
|
#if DEBUG
|
|
fprintf(stderr, "recvmsg: not implemented for fd %d\n", sock);
|
|
#endif
|
|
|
|
errno= ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
static ssize_t _uds_recvmsg_conn(int sock, struct msghdr *msg, int flags)
|
|
{
|
|
int r, rc;
|
|
|
|
if (flags != 0) {
|
|
#if DEBUG
|
|
fprintf(stderr, "recvmsg(uds): flags not implemented\n");
|
|
#endif
|
|
errno= ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
r= readv(sock, msg->msg_iov, msg->msg_iovlen);
|
|
|
|
if (r >= 0 && msg->msg_name && msg->msg_namelen > 0) {
|
|
getpeername(sock, msg->msg_name, &msg->msg_namelen);
|
|
}
|
|
|
|
/* get control data */
|
|
if (r >= 0 && msg->msg_control && msg->msg_controllen > 0) {
|
|
struct msg_control msg_ctrl;
|
|
|
|
memset(&msg_ctrl, '\0', sizeof(struct msg_control));
|
|
msg_ctrl.msg_controllen = msg->msg_controllen;
|
|
rc = ioctl(sock, NWIOGUDSCTRL, &msg_ctrl);
|
|
if (rc == -1) {
|
|
return rc;
|
|
}
|
|
|
|
if (msg_ctrl.msg_controllen <= msg->msg_controllen) {
|
|
memcpy(msg->msg_control, msg_ctrl.msg_control,
|
|
msg_ctrl.msg_controllen);
|
|
msg->msg_controllen = msg_ctrl.msg_controllen;
|
|
}
|
|
}
|
|
|
|
msg->msg_flags = 0;
|
|
|
|
return r;
|
|
}
|
|
|
|
static ssize_t _uds_recvmsg_dgram(int sock, struct msghdr *msg, int flags)
|
|
{
|
|
int r, rc;
|
|
|
|
if (flags != 0) {
|
|
#if DEBUG
|
|
fprintf(stderr, "recvmsg(uds): flags not implemented\n");
|
|
#endif
|
|
errno= ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
r= readv(sock, msg->msg_iov, msg->msg_iovlen);
|
|
|
|
if (r >= 0 && msg->msg_name &&
|
|
msg->msg_namelen >= sizeof(struct sockaddr_un))
|
|
{
|
|
rc= ioctl(sock, NWIOGUDSFADDR, msg->msg_name);
|
|
if (rc == -1) {
|
|
return rc;
|
|
}
|
|
msg->msg_namelen= sizeof(struct sockaddr_un);
|
|
}
|
|
|
|
/* get control data */
|
|
if (r >= 0 && msg->msg_control && msg->msg_controllen > 0) {
|
|
struct msg_control msg_ctrl;
|
|
|
|
memset(&msg_ctrl, '\0', sizeof(struct msg_control));
|
|
msg_ctrl.msg_controllen = msg->msg_controllen;
|
|
rc = ioctl(sock, NWIOGUDSCTRL, &msg_ctrl);
|
|
if (rc == -1) {
|
|
return rc;
|
|
}
|
|
|
|
if (msg_ctrl.msg_controllen <= msg->msg_controllen) {
|
|
memcpy(msg->msg_control, msg_ctrl.msg_control,
|
|
msg_ctrl.msg_controllen);
|
|
msg->msg_controllen = msg_ctrl.msg_controllen;
|
|
}
|
|
}
|
|
|
|
msg->msg_flags = 0;
|
|
|
|
return r;
|
|
}
|