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attempting to wrap over bpf

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This commit is contained in:
hyung-hwan 2020-11-16 15:40:20 +00:00
parent 483c855ff2
commit 2a561ad46b
3 changed files with 139 additions and 25 deletions
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7
mio/bin/t01.c
View File

@ -419,7 +419,9 @@ static int setup_arp_tester (mio_t* mio)
//mio_bcstrtoifindex (mio, "enp0s25.3", &ifindex);
//mio_skad_init_for_eth (&ethdst, ifindex, (mio_ethaddr_t*)"\xFF\xFF\xFF\xFF\xFF\xFF");
//mio_skad_init_for_eth (&ethdst, ifindex, (mio_ethaddr_t*)"\xAA\xBB\xFF\xCC\xDD\xFF");
mio_bcstrtoifindex (mio, "eno1", &ifindex);
//mio_bcstrtoifindex (mio, "eno1", &ifindex);
//mio_skad_init_for_eth (&ethdst, ifindex, (mio_ethaddr_t*)"\xAA\xBB\xFF\xCC\xDD\xFF");
mio_bcstrtoifindex (mio, "bce0", &ifindex);
mio_skad_init_for_eth (&ethdst, ifindex, (mio_ethaddr_t*)"\xAA\xBB\xFF\xCC\xDD\xFF");
memset (&etharp, 0, MIO_SIZEOF(etharp));
@ -467,7 +469,8 @@ static void send_icmp (mio_dev_sck_t* dev, mio_uint16_t seq)
mio_icmphdr_t* icmphdr;
mio_uint8_t buf[512];
mio_bcstrtoskad (mio, "192.168.9.1", &dstaddr);
//mio_bcstrtoskad (mio, "192.168.9.1", &dstaddr);
mio_bcstrtoskad (mio, "192.168.1.1", &dstaddr);
memset(buf, 0, MIO_SIZEOF(buf));
icmphdr = (mio_icmphdr_t*)buf;

15
mio/lib/mio-sck.h
View File

@ -31,7 +31,7 @@
#include <mio-skad.h>
/* ========================================================================= */
/* TOOD: move these to a separte file */
/* TOOD: move these to a separate file */
#define MIO_ETHHDR_PROTO_IP4 0x0800
#define MIO_ETHHDR_PROTO_ARP 0x0806
@ -269,18 +269,21 @@ enum mio_dev_sck_type_t
MIO_DEV_SCK_UDP4,
MIO_DEV_SCK_UDP6,
/* ARP at the ethernet layer */
MIO_DEV_SCK_ARP,
MIO_DEV_SCK_ARP_DGRAM,
/* ICMP at the IPv4 layer */
MIO_DEV_SCK_ICMP4,
/* ICMP at the IPv6 layer */
MIO_DEV_SCK_ICMP6,
/* ARP at the ethernet layer */
MIO_DEV_SCK_ARP,
MIO_DEV_SCK_ARP_DGRAM,
/* raw L2-level packet */
MIO_DEV_SCK_PACKET
MIO_DEV_SCK_PACKET,
/* bpf socket */
MIO_DEV_SCK_BPF
};
typedef enum mio_dev_sck_type_t mio_dev_sck_type_t;

140
mio/lib/sck.c
View File

@ -51,6 +51,12 @@
# include <sys/sendfile.h>
#endif
#if defined(HAVE_SYS_IOCTL_H)
# include <sys/ioctl.h>
#endif
#include <net/bpf.h>
#if defined(__linux__)
# include <limits.h>
# if defined(HAVE_LINUX_NETFILTER_IPV4_H)
@ -78,7 +84,6 @@
# define USE_SSL
#endif
/* ========================================================================= */
static mio_syshnd_t open_async_socket (mio_t* mio, int domain, int type, int proto)
@ -116,8 +121,8 @@ done:
return sck;
oops:
if (sck != MIO_SYSHND_INVALID) close (sck);
mio_seterrwithsyserr (mio, 0, errno);
if (sck != MIO_SYSHND_INVALID) close (sck);
return MIO_SYSHND_INVALID;
}
@ -139,6 +144,7 @@ open_socket:
goto open_socket;
}
#endif
mio_seterrwithsyserr (mio, 0, errno);
return MIO_SYSHND_INVALID;
}
else
@ -153,6 +159,7 @@ open_socket:
mio_makesyshndcloexec(mio, fd[0]) <= -1 ||
mio_makesyshndcloexec(mio, fd[1]) <= -1)
{
mio_seterrwithsyserr (mio, 0, errno);
close (fd[0]);
close (fd[1]);
return MIO_SYSHND_INVALID;
@ -163,6 +170,25 @@ done:
return fd[0]; /* read end of the pipe */
}
static mio_syshnd_t open_async_bpf (mio_t* mio)
{
mio_syshnd_t fd = MIO_SYSHND_INVALID;
int tmp;
unsigned int bufsize;
fd = open("/dev/bpf", O_RDWR);
if (fd == MIO_SYSHND_INVALID) goto oops;
if (ioctl(fd, BIOCIMMEDIATE, &tmp) == -1) goto oops;
if (ioctl(fd, BIOCGBLEN, &bufsize) == -1) goto oops;
return fd;
oops:
mio_seterrwithsyserr (mio, 0, errno);
if (fd != MIO_SYSHND_INVALID) close (fd);
return MIO_SYSHND_INVALID;
}
/* ========================================================================= */
static mio_devaddr_t* skad_to_devaddr (mio_dev_sck_t* dev, const mio_skad_t* sckaddr, mio_devaddr_t* devaddr)
@ -195,6 +221,7 @@ struct sck_type_map_t
};
#define __AF_QX 999999
#define __AF_BPF 999998
static struct sck_type_map_t sck_type_map[] =
{
@ -213,12 +240,17 @@ static struct sck_type_map_t sck_type_map[] =
/* MIO_DEV_SCK_UDP6 */
{ AF_INET6, SOCK_DGRAM, 0, 0 },
/* MIO_DEV_SCK_ICMP4 - IP protocol field is 1 byte only. no byte order conversion is needed */
{ AF_INET, SOCK_RAW, IPPROTO_ICMP, 0, },
/* MIO_DEV_SCK_ICMP6 - IP protocol field is 1 byte only. no byte order conversion is needed */
{ AF_INET6, SOCK_RAW, IPPROTO_ICMP, 0, },
#if defined(AF_PACKET) && (MIO_SIZEOF_STRUCT_SOCKADDR_LL > 0)
/* MIO_DEV_SCK_ARP - Ethernet type is 2 bytes long. Protocol must be specified in the network byte order */
{ AF_PACKET, SOCK_RAW, MIO_CONST_HTON16(MIO_ETHHDR_PROTO_ARP), 0 },
/* MIO_DEV_SCK_ARP_DGRAM */
/* MIO_DEV_SCK_ARP_DGRAM - link-level header removed*/
{ AF_PACKET, SOCK_DGRAM, MIO_CONST_HTON16(MIO_ETHHDR_PROTO_ARP), 0 },
#elif defined(AF_LINK) && (MIO_SIZEOF_STRUCT_SOCKADDR_DL > 0)
@ -232,22 +264,19 @@ static struct sck_type_map_t sck_type_map[] =
{ -1, 0, 0, 0 },
#endif
/* MIO_DEV_SCK_ICMP4 - IP protocol field is 1 byte only. no byte order conversion is needed */
{ AF_INET, SOCK_RAW, IPPROTO_ICMP, 0, },
/* MIO_DEV_SCK_ICMP6 - IP protocol field is 1 byte only. no byte order conversion is needed */
{ AF_INET6, SOCK_RAW, IPPROTO_ICMP, 0, },
#if defined(AF_PACKET) && (MIO_SIZEOF_STRUCT_SOCKADDR_LL > 0)
/* MIO_DEV_SCK_PACKET */
{ AF_PACKET, SOCK_RAW, MIO_CONST_HTON16(ETH_P_ALL), 0 },
#elif defined(AF_LINK) && (MIO_SIZEOF_STRUCT_SOCKADDR_DL > 0)
/* MIO_DEV_SCK_PACKET */
{ AF_PACKET, SOCK_RAW, MIO_CONST_HTON16(ETH_P_ALL), 0 },
{ AF_LINK, SOCK_RAW, MIO_CONST_HTON16(0), 0 },
#else
{ -1, 0, 0, 0 },
#endif
/* MIO_DEV_SCK_BPF - arp */
{ __AF_BPF, 0, 0, 0 } /* not implemented yet */
};
/* ======================================================================== */
@ -571,6 +600,14 @@ static int dev_sck_read_stateless (mio_dev_t* dev, void* buf, mio_iolen_t* len,
return 1;
}
static int dev_sck_read_bpf (mio_dev_t* dev, void* buf, mio_iolen_t* len, mio_devaddr_t* srcaddr)
{
mio_t* mio = dev->mio;
mio_dev_sck_t* rdev = (mio_dev_sck_t*)dev;
mio_seterrwithsyserr (mio, 0, MIO_ENOIMPL);
return -1;
}
/* ------------------------------------------------------------------------------ */
static int dev_sck_write_stateful (mio_dev_t* dev, const void* data, mio_iolen_t* len, const mio_devaddr_t* dstaddr)
@ -801,6 +838,24 @@ static int dev_sck_writev_stateless (mio_dev_t* dev, const mio_iovec_t* iov, mio
return 1;
}
/* ------------------------------------------------------------------------------ */
static int dev_sck_write_bpf (mio_dev_t* dev, const void* data, mio_iolen_t* len, const mio_devaddr_t* dstaddr)
{
mio_t* mio = dev->mio;
mio_dev_sck_t* rdev = (mio_dev_sck_t*)dev;
mio_seterrwithsyserr (mio, 0, MIO_ENOIMPL);
return -1;
}
static int dev_sck_writev_bpf (mio_dev_t* dev, const mio_iovec_t* iov, mio_iolen_t* iovcnt, const mio_devaddr_t* dstaddr)
{
mio_t* mio = dev->mio;
mio_dev_sck_t* rdev = (mio_dev_sck_t*)dev;
mio_seterrwithsyserr (mio, 0, MIO_ENOIMPL);
return -1;
}
/* ------------------------------------------------------------------------------ */
static int dev_sck_sendfile_stateful (mio_dev_t* dev, mio_syshnd_t in_fd, mio_foff_t foff, mio_iolen_t* len)
@ -1317,7 +1372,7 @@ fcntl (rdev->hnd, F_SETFL, flags | O_NONBLOCK);
return 0;
}
static mio_dev_mth_t dev_sck_methods_stateless =
static mio_dev_mth_t dev_mth_sck_stateless =
{
dev_sck_make,
dev_sck_kill,
@ -1332,7 +1387,7 @@ static mio_dev_mth_t dev_sck_methods_stateless =
};
static mio_dev_mth_t dev_sck_methods_stateful =
static mio_dev_mth_t dev_mth_sck_stateful =
{
dev_sck_make,
dev_sck_kill,
@ -1360,6 +1415,20 @@ static mio_dev_mth_t dev_mth_clisck =
dev_sck_ioctl
};
static mio_dev_mth_t dev_mth_sck_bpf =
{
dev_sck_make,
dev_sck_kill,
MIO_NULL,
dev_sck_getsyshnd,
dev_sck_read_bpf,
dev_sck_write_bpf,
dev_sck_writev_bpf,
MIO_NULL, /* sendfile */
dev_sck_ioctl, /* ioctl */
};
/* ========================================================================= */
static int harvest_outgoing_connection (mio_dev_sck_t* rdev)
@ -1969,6 +2038,39 @@ static mio_dev_evcb_t dev_sck_event_callbacks_qx =
/* ========================================================================= */
static int dev_evcb_sck_ready_bpf (mio_dev_t* dev, int events)
{
mio_t* mio = dev->mio;
mio_dev_sck_t* rdev = (mio_dev_sck_t*)dev;
mio_seterrnum (mio, MIO_ENOIMPL);
return -1;
}
static int dev_evcb_sck_on_read_bpf (mio_dev_t* dev, const void* data, mio_iolen_t dlen, const mio_devaddr_t* srcaddr)
{
mio_t* mio = dev->mio;
mio_dev_sck_t* rdev = (mio_dev_sck_t*)dev;
mio_seterrnum (mio, MIO_ENOIMPL);
return -1;
}
static int dev_evcb_sck_on_write_bpf (mio_dev_t* dev, mio_iolen_t wrlen, void* wrctx, const mio_devaddr_t* dstaddr)
{
mio_t* mio = dev->mio;
mio_dev_sck_t* rdev = (mio_dev_sck_t*)dev;
mio_seterrnum (mio, MIO_ENOIMPL);
return -1;
}
static mio_dev_evcb_t dev_sck_event_callbacks_bpf =
{
dev_evcb_sck_ready_bpf,
dev_evcb_sck_on_read_bpf,
dev_evcb_sck_on_write_bpf
};
/* ========================================================================= */
mio_dev_sck_t* mio_dev_sck_make (mio_t* mio, mio_oow_t xtnsize, const mio_dev_sck_make_t* info)
{
mio_dev_sck_t* rdev;
@ -1983,19 +2085,25 @@ mio_dev_sck_t* mio_dev_sck_make (mio_t* mio, mio_oow_t xtnsize, const mio_dev_sc
{
rdev = (mio_dev_sck_t*)mio_dev_make(
mio, MIO_SIZEOF(mio_dev_sck_t) + xtnsize,
&dev_sck_methods_stateless, &dev_sck_event_callbacks_qx, (void*)info);
&dev_mth_sck_stateless, &dev_sck_event_callbacks_qx, (void*)info);
}
else if (info->type == MIO_DEV_SCK_BPF)
{
rdev = (mio_dev_sck_t*)mio_dev_make(
mio, MIO_SIZEOF(mio_dev_sck_t) + xtnsize,
&dev_mth_sck_bpf, &dev_sck_event_callbacks_bpf, (void*)info);
}
else if (sck_type_map[info->type].extra_dev_cap & MIO_DEV_CAP_STREAM) /* can't use the IS_STATEFUL() macro yet */
{
rdev = (mio_dev_sck_t*)mio_dev_make(
mio, MIO_SIZEOF(mio_dev_sck_t) + xtnsize,
&dev_sck_methods_stateful, &dev_sck_event_callbacks_stateful, (void*)info);
&dev_mth_sck_stateful, &dev_sck_event_callbacks_stateful, (void*)info);
}
else
{
rdev = (mio_dev_sck_t*)mio_dev_make(
mio, MIO_SIZEOF(mio_dev_sck_t) + xtnsize,
&dev_sck_methods_stateless, &dev_sck_event_callbacks_stateless, (void*)info);
&dev_mth_sck_stateless, &dev_sck_event_callbacks_stateless, (void*)info);
}
return rdev;