Support zero copy while call `ff_write`, you can enable it by modify ‘FF_ZC_SEND=1' in `lib/Makefile`.

`FF_ZC_SEND` is same as `FF_USE_PAGE_ARRAY`, it will improve performance slightly in some scena

Support zero copy while call `ff_write`, you can enable it by modify ‘FF_ZC_SEND=1' in `lib/Makefile`.

`FF_ZC_SEND` is same as `FF_USE_PAGE_ARRAY`, it will improve performance slightly in some scenarios, need to be tested in combination with real applications.

You can enable both compilation options at the same time or separately.

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Update LICENCE.

modify `struct linux_sockaddr` same to `struct sockaddr` in linux.

Add `ff_regist_pcblddr_fun` to regist a pcb lddr function in F-Stack.

If There are multiple ips, and F-Stack client application can choose a source ip by yourself, instead always use the first ip.

User APP can use AF_INET6/PF_INET6 directly whether call ff socket or linux API, such as inet_ntoa/inet_aton.

Fix define PF_INET6_LINUX

IPv6: FreeBSD stack and f-stack support ipv6.

Add dispatch API reference.

Add dispatch API reference.

modify packet_dispatcher to support response package direct.

modify packet_dispatcher to support response package direct.

Misc: some updates.

1.add interface `ff_dup` and `ff_dup2`.
2.add interface `ff_ioctl_freebsd`/`ff_getsockopt_freebsd`/`ff_setsockopt_freebsd` for tools.
3.initial parameter `proc-type` can be NULL,

Misc: some updates.

1.add interface `ff_dup` and `ff_dup2`.
2.add interface `ff_ioctl_freebsd`/`ff_getsockopt_freebsd`/`ff_setsockopt_freebsd` for tools.
3.initial parameter `proc-type` can be NULL, default "auto".

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Misc: some updates.

1.add interface `ff_dup` and `ff_dup2`.
2.add interface `ff_ioctl_freebsd`/`ff_getsockopt_freebsd`/`ff_setsockopt_freebsd` for tools.
3.initial parameter `proc-type` can be NULL,

Misc: some updates.

1.add interface `ff_dup` and `ff_dup2`.
2.add interface `ff_ioctl_freebsd`/`ff_getsockopt_freebsd`/`ff_setsockopt_freebsd` for tools.
3.initial parameter `proc-type` can be NULL, default "auto".

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Remove the unusable api `ff_socketpair`.

Since F-Stack doesn't support AF_UNIX. ff_socketpair couldn't work and
should be removed.

Remove the unusable api `ff_socketpair`.

Since F-Stack doesn't support AF_UNIX. ff_socketpair couldn't work and
should be removed.

Nginx: support kernel network stack, so we can do what fstack can't do,
e.g. unix socket, ipc (with APP on kernel network stack), packet from kernel network stack.
1. Add a new directive kernel_netw

Nginx: support kernel network stack, so we can do what fstack can't do,
e.g. unix socket, ipc (with APP on kernel network stack), packet from kernel network stack.
1. Add a new directive kernel_network_stack :
Syntax: kernel_network_stack on | off;
Default: kernel_network_stack off;
Context: http, server
This directive is available only when NGX_HAVE_FF_STACK is defined.
Determines whether server should run on kernel network stack or fstack.
2. Use a simpler and more effective solution to discriminate fstack fd(file descriptor, only socket for now) from kernel fd.

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Nginx: support kernel network stack, so we can do what fstack can't do,
e.g. unix socket, ipc (with APP on kernel network stack), packet from kernel network stack.
1. Add a new directive kernel_netw

Nginx: support kernel network stack, so we can do what fstack can't do,
e.g. unix socket, ipc (with APP on kernel network stack), packet from kernel network stack.
1. Add a new directive kernel_network_stack :
Syntax: kernel_network_stack on | off;
Default: kernel_network_stack off;
Context: http, server
This directive is available only when NGX_HAVE_FF_STACK is defined.
Determines whether server should run on kernel network stack or fstack.
2. Use a simpler and more effective solution to discriminate fstack fd(file descriptor, only socket for now) from kernel fd.

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Add tool: ipfw.

ipfw -- interface for firewall, packet scheduler, NAT and so on.

It is comprised of several components: the kernel firewall filter rule processor and its integrated packet accountin

Add tool: ipfw.

ipfw -- interface for firewall, packet scheduler, NAT and so on.

It is comprised of several components: the kernel firewall filter rule processor and its integrated packet accounting facility, the logging facility, NAT, a forward facility, a bridge facility, and an ipstealth facility.
Note that the `dummynet` traffic shaper is not merged.

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Add tool: ipfw.

ipfw -- interface for firewall, packet scheduler, NAT and so on.

It is comprised of several components: the kernel firewall filter rule processor and its integrated packet accountin

Add tool: ipfw.

ipfw -- interface for firewall, packet scheduler, NAT and so on.

It is comprised of several components: the kernel firewall filter rule processor and its integrated packet accounting facility, the logging facility, NAT, a forward facility, a bridge facility, and an ipstealth facility.
Note that the `dummynet` traffic shaper is not merged.

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Api: add packet dispatch callback function register.

In some cases, for example, packets are forwarded to your server through
IP tunnel, and they will be received on fixed queues, since RSS doesn't

Api: add packet dispatch callback function register.

In some cases, for example, packets are forwarded to your server through
IP tunnel, and they will be received on fixed queues, since RSS doesn't support tunnels.So we need to dispatch them again.

With this commit, we can implement a dispatcher callback function and regist
it, packets retrieved from rx queue will be dispatched again according to
the dispatcher result.

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Add tool: ngctl.

ngctl -- netgraph control utility.
The ngctl utility creates a new netgraph node of type socket which can be used to issue netgraph commands.

Simplify startup arguments and add ff_fdisused.

Changes:
1.Simplify f-stack startup arguments:"--conf, --proc-type, --proc-id".
2.add a function `ff_fdisused` to check if fd is used in f-stack.

Add API: ff_gettimeofday.

Since f-stack run with polling mode, nginx will call gettimeofday every loop, and cost a lot.
With this commit, f-stack will update current timespec periodically in
ff_hard

Add API: ff_gettimeofday.

Since f-stack run with polling mode, nginx will call gettimeofday every loop, and cost a lot.
With this commit, f-stack will update current timespec periodically in
ff_hardclock_job. And ff_gettimeofday will get this value.
In nginx, hijack gettimeofday to call ff_gettimeofday.

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Add tool: route.

This commit ports FreeBSD `route` to F-Stack, can be used to set the route
table.

epoll optimization, add ff_kevent_do_each