57 struct cmsghdr {  struct
68 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))  argument
69 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
70 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
72 …_CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ?   (struct cmsghdr *)(ctl) :   (struct c…
74 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) &&   (cmsg)->cmsg_len <= (u…
84 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,  in __cmsg_nxthdr()
85  struct cmsghdr *__cmsg)  in __cmsg_nxthdr()
87  struct cmsghdr * __ptr;  in __cmsg_nxthdr()
89  __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));  in __cmsg_nxthdr()
91  return (struct cmsghdr *)0;  in __cmsg_nxthdr()
96 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)  in cmsg_nxthdr()