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CMSG_XXX macros alignment fixes to follow RFC2292.

Browse Source 
Approved by: jkh

Submitted by: Partly from tech@openbsd
Reviewed by: itojun
This commit is contained in:
Yoshinobu Inoue 2000-03-03 11:13:12 +00:00
parent e84d092b81
commit 7d0d8dc306
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=57719
7 changed files with 46 additions and 43 deletions
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24
lib/libc/net/rthdr.c
View File

@ -63,7 +63,9 @@ inet6_rthdr_init(bp, type)
int type;
{
register struct cmsghdr *ch = (struct cmsghdr *)bp;
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(ch + 1);
register struct ip6_rthdr *rthdr;
rthdr = (struct ip6_rthdr *)CMSG_DATA(ch);
ch->cmsg_level = IPPROTO_IPV6;
ch->cmsg_type = IPV6_RTHDR;
@ -88,7 +90,9 @@ inet6_rthdr_add(cmsg, addr, flags)
const struct in6_addr *addr;
u_int flags;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
register struct ip6_rthdr *rthdr;
rthdr = (struct ip6_rthdr *)CMSG_DATA(cmsg);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
@ -135,7 +139,9 @@ inet6_rthdr_lasthop(cmsg, flags)
struct cmsghdr *cmsg;
unsigned int flags;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
register struct ip6_rthdr *rthdr;
rthdr = (struct ip6_rthdr *)CMSG_DATA(cmsg);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
@ -189,7 +195,9 @@ int
inet6_rthdr_segments(cmsg)
const struct cmsghdr *cmsg;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
register struct ip6_rthdr *rthdr;
rthdr = (struct ip6_rthdr *)CMSG_DATA(cmsg);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
@ -221,7 +229,9 @@ inet6_rthdr_getaddr(cmsg, index)
struct cmsghdr *cmsg;
int index;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
register struct ip6_rthdr *rthdr;
rthdr = (struct ip6_rthdr *)CMSG_DATA(cmsg);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
@ -260,7 +270,9 @@ inet6_rthdr_getflags(cmsg, index)
const struct cmsghdr *cmsg;
int index;
{
register struct ip6_rthdr *rthdr = (struct ip6_rthdr *)(cmsg + 1);
register struct ip6_rthdr *rthdr;
rthdr = (struct ip6_rthdr *)CMSG_DATA(cmsg);
switch(rthdr->ip6r_type) {
case IPV6_RTHDR_TYPE_0:

2
sbin/ping/ping.c
View File

@ -213,7 +213,7 @@ main(argc, argv)
struct iovec iov;
struct msghdr msg;
struct sockaddr_in from;
char ctrl[sizeof(struct cmsghdr) + sizeof(struct timeval)];
char ctrl[CMSG_SPACE(sizeof(struct timeval))];
#ifdef IPSEC_POLICY_IPSEC
char *policy_in = NULL;
char *policy_out = NULL;

7
sys/kern/uipc_sockbuf.c
View File

@ -839,16 +839,15 @@ sbcreatecontrol(p, size, type, level)
register struct cmsghdr *cp;
struct mbuf *m;
if ((u_int)size > MLEN)
if (CMSG_SPACE((u_int)size) > MLEN)
return ((struct mbuf *) NULL);
if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
return ((struct mbuf *) NULL);
cp = mtod(m, struct cmsghdr *);
/* XXX check size? */
(void)memcpy(CMSG_DATA(cp), p, size);
size += sizeof(*cp);
m->m_len = size;
cp->cmsg_len = size;
m->m_len = CMSG_SPACE(size);
cp->cmsg_len = CMSG_LEN(size);
cp->cmsg_level = level;
cp->cmsg_type = type;
return (m);

7
sys/kern/uipc_socket2.c
View File

@ -839,16 +839,15 @@ sbcreatecontrol(p, size, type, level)
register struct cmsghdr *cp;
struct mbuf *m;
if ((u_int)size > MLEN)
if (CMSG_SPACE((u_int)size) > MLEN)
return ((struct mbuf *) NULL);
if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
return ((struct mbuf *) NULL);
cp = mtod(m, struct cmsghdr *);
/* XXX check size? */
(void)memcpy(CMSG_DATA(cp), p, size);
size += sizeof(*cp);
m->m_len = size;
cp->cmsg_len = size;
m->m_len = CMSG_SPACE(size);
cp->cmsg_len = CMSG_LEN(size);
cp->cmsg_level = level;
cp->cmsg_type = type;
return (m);

4
sys/netinet6/ip6_output.c
View File

@ -1980,8 +1980,8 @@ ip6_setpktoptions(control, opt, priv)
opt->ip6po_m = control;
for (; control->m_len; control->m_data += CMSG_ALIGN(cm->cmsg_len),
control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
for (; control->m_len; control->m_data += ALIGN(cm->cmsg_len),
control->m_len -= ALIGN(cm->cmsg_len)) {
cm = mtod(control, struct cmsghdr *);
if (cm->cmsg_len == 0 || cm->cmsg_len > control->m_len)
return(EINVAL);

19
sys/sys/socket.h
View File

@ -351,26 +351,21 @@ struct cmsgcred {
};
/* given pointer to struct cmsghdr, return pointer to data */
#define CMSG_DATA(cmsg) ((u_char *)((cmsg) + 1))
/*
* Alignment requirement for CMSG struct manipulation.
* This is different from ALIGN() defined in ARCH/include/param.h.
* XXX think again carefully about architecture dependencies.
*/
#define CMSG_ALIGN(n) (((n) + 3) & ~3)
#define CMSG_DATA(cmsg) ((u_char *)(cmsg) + \
ALIGN(sizeof(struct cmsghdr)))
/* given pointer to struct cmsghdr, return pointer to next cmsghdr */
#define CMSG_NXTHDR(mhdr, cmsg) \
(((caddr_t)(cmsg) + (cmsg)->cmsg_len + sizeof(struct cmsghdr) > \
(((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len) + \
ALIGN(sizeof(struct cmsghdr)) > \
(caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
(struct cmsghdr *)NULL : \
(struct cmsghdr *)((caddr_t)(cmsg) + CMSG_ALIGN((cmsg)->cmsg_len)))
(struct cmsghdr *)((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len)))
#define CMSG_FIRSTHDR(mhdr) ((struct cmsghdr *)(mhdr)->msg_control)
#define CMSG_SPACE(l) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(l))
#define CMSG_LEN(l) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (l))
#define CMSG_SPACE(l) (ALIGN(sizeof(struct cmsghdr)) + ALIGN(l))
#define CMSG_LEN(l) (ALIGN(sizeof(struct cmsghdr)) + (l))
/* "Socket"-level control message types: */
#define SCM_RIGHTS 0x01 /* access rights (array of int) */

26
usr.bin/telnet/commands.c
View File

@ -2879,19 +2879,18 @@ sourceroute(ai, arg, cpp, lenp, protop, optp)
* at least 7 bytes for the option.
*/
if (cpp == NULL || lenp == NULL)
return((unsigned long)-1);
return -1;
if (*cpp != NULL) {
switch (res->ai_family) {
case AF_INET:
if (*lenp < 7)
return((unsigned long)-1);
return -1;
break;
#ifdef INET6
case AF_INET6:
if (*lenp < (sizeof(struct cmsghdr) +
sizeof(struct ip6_rthdr) +
sizeof(struct in6_addr)))
return((unsigned long)-1);
if (*lenp < CMSG_SPACE(sizeof(struct ip6_rthdr) +
sizeof(struct in6_addr)))
return -1;
break;
#endif
}
@ -2904,7 +2903,7 @@ sourceroute(ai, arg, cpp, lenp, protop, optp)
lsrp = *cpp;
ep = lsrp + *lenp;
} else {
*cpp = lsrp = buf;
*cpp = lsrp = ALIGN(buf);
ep = lsrp + 1024;
}
@ -2940,7 +2939,7 @@ sourceroute(ai, arg, cpp, lenp, protop, optp)
#endif
if (*cp != '@')
return((unsigned long)-1);
return -1;
#ifndef sysV88
lsrp++; /* skip over length, we'll fill it in later */
@ -3016,16 +3015,15 @@ sourceroute(ai, arg, cpp, lenp, protop, optp)
*/
#ifdef INET6
if (res->ai_family == AF_INET6) {
if (((char *)cmsg +
sizeof(struct cmsghdr) +
if (((char *)CMSG_DATA(cmsg) +
sizeof(struct ip6_rthdr) +
((inet6_rthdr_segments(cmsg) + 1) *
sizeof(struct in6_addr))) > ep)
return((unsigned long)-1);
return -1;
} else
#endif
if (lsrp + 4 > ep)
return((unsigned long)-1);
return -1;
freeaddrinfo(res);
}
#ifdef INET6
@ -3039,7 +3037,7 @@ sourceroute(ai, arg, cpp, lenp, protop, optp)
if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) {
*cpp = 0;
*lenp = 0;
return((unsigned long)-1);
return -1;
}
*lsrp++ = IPOPT_NOP; /* 32 bit word align it */
*lenp = lsrp - *cpp;
@ -3048,7 +3046,7 @@ sourceroute(ai, arg, cpp, lenp, protop, optp)
if (ipopt.io_len <= 5) { /* Is 3 better ? */
*cpp = 0;
*lenp = 0;
return((unsigned long)-1);
return -1;
}
*lenp = sizeof(ipopt);
*cpp = (char *) &ipopt;