C++ (Cpp) print_cmsg_type_data Examples

Example #1

File: net.c Project: 3125788/platform_external_strace

static void
printcmsghdr(struct tcb *tcp, unsigned long addr, size_t len)
{
	const size_t cmsg_size =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
		(current_wordsize < sizeof(long)) ? sizeof(struct cmsghdr32) :
#endif
			sizeof(struct cmsghdr);

	char *buf = len < cmsg_size ? NULL : malloc(len);
	if (!buf || umoven(tcp, addr, len, buf) < 0) {
		tprints(", msg_control=");
		printaddr(addr);
		free(buf);
		return;
	}

	union_cmsghdr u = { .ptr = buf };

	tprints(", [");
	while (len >= cmsg_size) {
		size_t cmsg_len =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
			(current_wordsize < sizeof(long)) ? u.cmsg32->cmsg_len :
#endif
				u.cmsg->cmsg_len;
		int cmsg_level =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
			(current_wordsize < sizeof(long)) ? u.cmsg32->cmsg_level :
#endif
				u.cmsg->cmsg_level;
		int cmsg_type =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
			(current_wordsize < sizeof(long)) ? u.cmsg32->cmsg_type :
#endif
				u.cmsg->cmsg_type;

		if (u.ptr != buf)
			tprints(", ");
		tprintf("{cmsg_len=%lu, cmsg_level=", (unsigned long) cmsg_len);
		printxval(socketlayers, cmsg_level, "SOL_???");
		tprints(", cmsg_type=");

		if (cmsg_len > len)
			cmsg_len = len;

		print_cmsg_type_data(tcp, cmsg_level, cmsg_type,
				     (const void *) (u.ptr + cmsg_size),
				     cmsg_len > cmsg_size ? cmsg_len - cmsg_size: 0);
		tprints("}");

		if (cmsg_len < cmsg_size) {
			len -= cmsg_size;
			break;
		}
		cmsg_len = (cmsg_len + current_wordsize - 1) &
			(size_t) ~(current_wordsize - 1);
		if (cmsg_len >= len) {
			len = 0;
			break;
		}
		u.ptr += cmsg_len;
		len -= cmsg_len;
	}
	if (len)
		tprints(", ...");
	tprints("]");
	free(buf);
}

Example #2

File: msghdr.c Project: yunchih/strace

static void
decode_msg_control(struct tcb *tcp, unsigned long addr,
		   const size_t in_control_len)
{
	if (!in_control_len)
		return;
	tprints(", msg_control=");

	const size_t cmsg_size =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
		(current_wordsize < sizeof(long)) ? sizeof(struct cmsghdr32) :
#endif
			sizeof(struct cmsghdr);

	size_t control_len =
		in_control_len > get_optmem_max()
		? get_optmem_max() : in_control_len;
	size_t buf_len = control_len;
	char *buf = buf_len < cmsg_size ? NULL : malloc(buf_len);
	if (!buf || umoven(tcp, addr, buf_len, buf) < 0) {
		printaddr(addr);
		free(buf);
		return;
	}

	union_cmsghdr u = { .ptr = buf };

	tprints("[");
	while (buf_len >= cmsg_size) {
		const size_t cmsg_len =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
			(current_wordsize < sizeof(long)) ? u.cmsg32->cmsg_len :
#endif
				u.cmsg->cmsg_len;
		const int cmsg_level =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
			(current_wordsize < sizeof(long)) ? u.cmsg32->cmsg_level :
#endif
				u.cmsg->cmsg_level;
		const int cmsg_type =
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
			(current_wordsize < sizeof(long)) ? u.cmsg32->cmsg_type :
#endif
				u.cmsg->cmsg_type;

		if (u.ptr != buf)
			tprints(", ");
		tprintf("{cmsg_len=%lu, cmsg_level=", (unsigned long) cmsg_len);
		printxval(socketlayers, cmsg_level, "SOL_???");
		tprints(", cmsg_type=");

		size_t len = cmsg_len > buf_len ? buf_len : cmsg_len;

		print_cmsg_type_data(tcp, cmsg_level, cmsg_type,
				     (const void *) (u.ptr + cmsg_size),
				     len > cmsg_size ? len - cmsg_size: 0);
		tprints("}");

		if (len < cmsg_size) {
			buf_len -= cmsg_size;
			break;
		}
		len = (cmsg_len + current_wordsize - 1) &
			(size_t) ~(current_wordsize - 1);
		if (len >= buf_len) {
			buf_len = 0;
			break;
		}
		u.ptr += len;
		buf_len -= len;
	}
	if (buf_len) {
		tprints(", ");
		printaddr(addr + (control_len - buf_len));
	} else if (control_len < in_control_len) {
		tprints(", ...");
	}
	tprints("]");
	free(buf);
}