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ipsvd: use IP:PORT syntax for environment vars. Pros:

Browse Source 
1. it's saner (matches internal libc sockaddr abstraction).
2. it's smaller.
Cons: not compatible with smarden's ipsvd.
Fix IPv6 define typos.
Stop interpreting options in prog's args.
Code size -162 bytes.
This commit is contained in:
Denis Vlasenko
2007-04-04 10:16:15 +00:00
parent 02fd66885c
commit 64a15124e7
2 changed files with 74 additions and 71 deletions
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25
ipsvd/udp_io.c
View File

@@ -18,12 +18,13 @@ socket_want_pktinfo(int fd)
#ifdef IP_PKTINFO
setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &const_int_1, sizeof(int));
#endif
#ifdef IPV6_PKTINFO
#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO, &const_int_1, sizeof(int));
#endif
}
#ifdef UNUSED
ssize_t
send_to_from(int fd, void *buf, size_t len, int flags,
const struct sockaddr *from, const struct sockaddr *to,
@@ -34,8 +35,11 @@ send_to_from(int fd, void *buf, size_t len, int flags,
#else
struct iovec iov[1];
struct msghdr msg;
char cbuf[LSA_SIZEOF_SA];
/* actually, max(sizeof(in_pktinfo),sizeof(in6_pktinfo)) */
char cbuf[sizeof(struct in_pktinfo)
#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
| sizeof(struct in6_pktinfo) /* (a|b) is poor man's max(a,b) */
#endif
];
struct cmsghdr* cmsgptr;
if (from->sa_family != AF_INET
@@ -73,11 +77,11 @@ send_to_from(int fd, void *buf, size_t len, int flags,
/* pktptr->ipi_ifindex = 0; -- already done by memset(cbuf...) */
pktptr->ipi_spec_dst = ((struct sockaddr_in*)from)->sin_addr;
}
#if ENABLE_FEATURE_IPV6 && defined(IP6_PKTINFO)
#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
struct in6_pktinfo *pktptr;
cmsgptr->cmsg_level = IPPROTO_IPV6;
cmsgptr->cmsg_type = IP6_PKTINFO;
cmsgptr->cmsg_type = IPV6_PKTINFO;
cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
pktptr = (struct in6_pktinfo *)(CMSG_DATA(cmsgptr));
/* pktptr->ipi6_ifindex = 0; -- already done by memset(cbuf...) */
@@ -87,8 +91,12 @@ send_to_from(int fd, void *buf, size_t len, int flags,
return sendmsg(fd, &msg, flags);
#endif
}
#endif /* UNUSED */
/* NB: this will never set port# in *to! */
/* NB: this will never set port# in 'to'!
* _Only_ IP/IPv6 address part of 'to' is _maybe_ modified.
* Typical usage is to preinit it with "default" value
* before calling recv_from_to(). */
ssize_t
recv_from_to(int fd, void *buf, size_t len, int flags,
struct sockaddr *from, struct sockaddr *to,
@@ -123,7 +131,6 @@ recv_from_to(int fd, void *buf, size_t len, int flags,
return recv_length;
/* Here we try to retrieve destination IP and memorize it */
memset(to, 0, sa_size);
for (cmsgptr = CMSG_FIRSTHDR(&msg);
cmsgptr != NULL;
cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)
@@ -138,9 +145,9 @@ recv_from_to(int fd, void *buf, size_t len, int flags,
#undef pktinfo
break;
}
#if ENABLE_FEATURE_IPV6 && defined(IP6_PKTINFO)
#if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO)
if (cmsgptr->cmsg_level == IPPROTO_IPV6
&& cmsgptr->cmsg_type == IP6_PKTINFO
&& cmsgptr->cmsg_type == IPV6_PKTINFO
) {
#define pktinfo(cmsgptr) ( (struct in6_pktinfo*)(CMSG_DATA(cmsgptr)) )
to->sa_family = AF_INET6;