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added Socket::send() that accepts the source address and sends with sendmsg with IP_PKTINFO/IP6_PKTINFO.

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This commit is contained in:
hyung-hwan 2018-10-24 08:41:56 +00:00
parent c56088d21a
commit 969a03b3c3
2 changed files with 86 additions and 2 deletions
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2
qse/include/qse/si/Socket.hpp
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@ -106,8 +106,10 @@ public:
// underlying system calls
qse_ssize_t send (const void* buf, qse_size_t len) QSE_CPP_NOEXCEPT;
qse_ssize_t send (const void* buf, qse_size_t len, const SocketAddress& dstaddr) QSE_CPP_NOEXCEPT;
qse_ssize_t send (const void* buf, qse_size_t len, const SocketAddress& dstaddr, const SocketAddress& srcaddr) QSE_CPP_NOEXCEPT;
qse_ssize_t send (const qse_ioptl_t* vec, int count) QSE_CPP_NOEXCEPT;
qse_ssize_t send (const qse_ioptl_t* vec, int count, const SocketAddress& dstaddr) QSE_CPP_NOEXCEPT;
qse_ssize_t send (const qse_ioptl_t* vec, int count, const SocketAddress& dstaddr, const SocketAddress& srcaddr) QSE_CPP_NOEXCEPT;
// The sendx() functions sends data as much as it can, possibly with multiple
// underlying system calls. these are useful for stream sockets and may not

86
qse/lib/si/Socket.cpp
View File

@ -500,6 +500,17 @@ qse_ssize_t Socket::send (const void* buf, qse_size_t len, const SocketAddress&
return n;
}
qse_ssize_t Socket::send (const void* buf, qse_size_t len, const SocketAddress& dstaddr, const SocketAddress& srcaddr) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (qse_is_sck_valid(this->handle));
qse_ioptl_t iov;
iov.ptr = (void*)buf;
iov.len = len;
return this->send(&iov, 1, dstaddr, srcaddr);
}
qse_ssize_t Socket::send (const qse_ioptl_t* iov, int count) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (qse_is_sck_valid(this->handle));
@ -534,8 +545,6 @@ qse_ssize_t Socket::send (const qse_ioptl_t* iov, int count, const SocketAddress
{
QSE_ASSERT (qse_is_sck_valid(this->handle));
QSE_ASSERT (qse_is_sck_valid(this->handle));
#if defined(HAVE_SENDMSG)
ssize_t nwritten;
@ -558,7 +567,80 @@ QSE_ASSERT (qse_is_sck_valid(this->handle));
this->setErrorCode (E_NOIMPL);
return -1;
#endif
}
qse_ssize_t Socket::send (const qse_ioptl_t* iov, int count, const SocketAddress& dstaddr, const SocketAddress& srcaddr) QSE_CPP_NOEXCEPT
{
QSE_ASSERT (qse_is_sck_valid(this->handle));
#if defined(HAVE_SENDMSG)
ssize_t nwritten;
struct msghdr msg;
QSE_MEMSET (&msg, 0, QSE_SIZEOF(msg));
msg.msg_name = (void*)dstaddr.getAddrPtr();
msg.msg_namelen = dstaddr.getAddrSize();
msg.msg_iov = (struct iovec*)iov;
msg.msg_iovlen = count;
switch (srcaddr.getFamily())
{
#if defined(AF_INET)
case AF_INET:
{
qse_uint8_t cmsgbuf[CMSG_SPACE(QSE_SIZEOF(struct in_pktinfo))];
msg.msg_control = cmsgbuf;
msg.msg_controllen = CMSG_LEN(QSE_SIZEOF(struct in_pktinfo));
struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = IPPROTO_IP;
cmsg->cmsg_type = IP_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(QSE_SIZEOF(struct in_pktinfo));
struct in_pktinfo* pi = (struct in_pktinfo*)CMSG_DATA(cmsg);
//QSE_MEMSET(pi, 0, QSE_SIZEOF(*pi));
pi->ipi_addr = *(struct in_addr*)srcaddr.getIp4addr();
pi->ipi_ifindex = 0; // let the kernel choose it
break;
}
#endif
#if defined(AF_INET6)
case AF_INET6:
{
qse_uint8_t cmsgbuf[CMSG_SPACE(QSE_SIZEOF(struct in6_pktinfo))];
msg.msg_control = cmsgbuf;
msg.msg_controllen = CMSG_LEN(QSE_SIZEOF(struct in6_pktinfo));;
struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = IPPROTO_IPV6;
cmsg->cmsg_type = IPV6_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(QSE_SIZEOF(struct in6_pktinfo));;
struct in6_pktinfo* pi = (struct in6_pktinfo*)CMSG_DATA(cmsg);
//QSE_MEMSET(pi, 0, QSE_SIZEOF(*pi));
pi->ipi6_addr = *(struct in6_addr*)srcaddr.getIp6addr();
pi->ipi6_ifindex = 0; // let the kernel choose it
break;
}
#endif
}
nwritten = ::sendmsg(this->handle, &msg, 0);
if (nwritten <= -1)
{
this->setErrorCode (syserr_to_errnum(errno));
return -1;
}
return nwritten;
#else
// TODO: combine to a single buffer .... use sendto....
this->setErrorCode (E_NOIMPL);
return -1;
#endif
}
int Socket::sendx (const void* buf, qse_size_t len, qse_size_t* total_sent) QSE_CPP_NOEXCEPT