diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/udp_io.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/libbb/udp_io.c b/libbb/udp_io.c index d9375ea..24237be 100644 --- a/libbb/udp_io.c +++ b/libbb/udp_io.c @@ -152,24 +152,24 @@ recv_from_to(int fd, void *buf, size_t len, int flags, if (cmsgptr->cmsg_level == IPPROTO_IP && cmsgptr->cmsg_type == IP_PKTINFO ) { -# define pktinfo(cmsgptr) ( (struct in_pktinfo*)(CMSG_DATA(cmsgptr)) ) + const int IPI_ADDR_OFF = offsetof(struct in_pktinfo, ipi_addr); to->sa_family = AF_INET; + /*# define pktinfo(cmsgptr) ( (struct in_pktinfo*)(CMSG_DATA(cmsgptr)) )*/ /*to4->sin_addr = pktinfo(cmsgptr)->ipi_addr; - may be unaligned */ - memcpy(&to4->sin_addr, &pktinfo(cmsgptr)->ipi_addr, sizeof(to4->sin_addr)); + memcpy(&to4->sin_addr, (char*)(CMSG_DATA(cmsgptr)) + IPI_ADDR_OFF, sizeof(to4->sin_addr)); /*to4->sin_port = 123; - this data is not supplied by kernel */ -# undef pktinfo break; } # if ENABLE_FEATURE_IPV6 && defined(IPV6_PKTINFO) if (cmsgptr->cmsg_level == IPPROTO_IPV6 && cmsgptr->cmsg_type == IPV6_PKTINFO ) { -# define pktinfo(cmsgptr) ( (struct in6_pktinfo*)(CMSG_DATA(cmsgptr)) ) + const int IPI6_ADDR_OFF = offsetof(struct in6_pktinfo, ipi6_addr); to->sa_family = AF_INET6; + /*# define pktinfo(cmsgptr) ( (struct in6_pktinfo*)(CMSG_DATA(cmsgptr)) )*/ /*to6->sin6_addr = pktinfo(cmsgptr)->ipi6_addr; - may be unaligned */ - memcpy(&to6->sin6_addr, &pktinfo(cmsgptr)->ipi6_addr, sizeof(to6->sin6_addr)); + memcpy(&to6->sin6_addr, (char*)(CMSG_DATA(cmsgptr)) + IPI6_ADDR_OFF, sizeof(to6->sin6_addr)); /*to6->sin6_port = 123; */ -# undef pktinfo break; } # endif |