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tpws: check for kernel version in fixseg

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bol-van
2024-11-19 13:59:46 +03:00
parent 19e7fca627
commit e12dd237c2
4 changed files with 27 additions and 2 deletions
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21
tpws/helpers.c
View File

@@ -10,6 +10,7 @@
#include <time.h>
#include <sys/stat.h>
#include <libgen.h>
#include <unistd.h>
#ifdef __linux__
#include <linux/tcp.h>
@@ -477,6 +478,24 @@ void msleep(unsigned int ms)
}
#ifdef __linux__
bool socket_supports_notsent()
{
int sfd;
struct tcp_info tcpi;
sfd = socket(AF_INET,SOCK_STREAM,0);
if (sfd<0) return false;
socklen_t ts = sizeof(tcpi);
if (getsockopt(sfd, IPPROTO_TCP, TCP_INFO, (char *)&tcpi, &ts) < 0)
{
close(sfd);
return false;
}
close(sfd);
return ts>=((char *)&tcpi.tcpi_notsent_bytes - (char *)&tcpi.tcpi_state + sizeof(tcpi.tcpi_notsent_bytes));
}
bool socket_has_notsent(int sfd)
{
struct tcp_info tcpi;
@@ -486,7 +505,7 @@ bool socket_has_notsent(int sfd)
return false;
if (tcpi.tcpi_state != 1) // TCP_ESTABLISHED
return false;
size_t s = (char *)&tcpi.tcpi_notsent_bytes - (char *)&tcpi.tcpi_state;
size_t s = (char *)&tcpi.tcpi_notsent_bytes - (char *)&tcpi + sizeof(tcpi.tcpi_notsent_bytes);
if (ts < s)
// old structure version
return false;

1
tpws/helpers.h
View File

@@ -120,6 +120,7 @@ static inline const struct in6_addr *mask_from_preflen6(uint8_t preflen)
void msleep(unsigned int ms);
#ifdef __linux__
bool socket_supports_notsent();
bool socket_has_notsent(int sfd);
bool socket_wait_notsent(int sfd, unsigned int delay_ms, unsigned int *wasted_ms);
#endif

5
tpws/tpws.c
View File

@@ -1236,6 +1236,11 @@ void parse_params(int argc, char *argv[])
}
break;
case 65: /* fix-seg */
if (!socket_supports_notsent())
{
DLOG_ERR("--fix-seg is supported since kernel 4.6\n");
exit_clean(1);
}
if (optarg)
{
i = atoi(optarg);