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Code Releases Activity

Let OS decide on buffer size

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This commit is contained in:
Job Snijders
2021-08-20 02:10:31 +00:00
parent 6c8c6cfec1
commit 362f747f0f
1 changed files with 14 additions and 34 deletions
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48
sx_maxsockbuf.c
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@@ -39,19 +39,15 @@
#include "extern.h"
#include "sx_report.h"
#ifndef SX_MAXSOCKBUF_MAX
#define SX_MAXSOCKBUF_MAX (2 * 1024 * 1024)
#endif
int
sx_maxsockbuf(int s, int dir)
{
{
int optval = 0, voptval;
int hiconf = -1, loconf = -1;
unsigned int voptlen;
int phase = 0, iterations = 0;
if (s < 0) {
if (s < 0) {
sx_report(SX_FATAL,"Unable to maximize sockbuf on invalid "
"socket %i\n", s);
exit(1);
@@ -65,30 +61,27 @@ sx_maxsockbuf(int s, int dir)
return -1;
}
for (;;) {
for (;;) {
iterations++;
if (phase == 0)
optval<<=1;
else {
optval <<= 1;
else {
if (optval == (hiconf + loconf) / 2)
break;
optval = (hiconf + loconf) / 2;
}
if (optval > SX_MAXSOCKBUF_MAX && phase == 0)
break;
if (setsockopt(s, SOL_SOCKET, dir, (void*)&optval,
sizeof(optval)) == -1) {
if (phase == 0)
phase = 1;
phase = 1;
hiconf = optval;
hiconf = optval;
continue;
} else {
} else {
loconf = optval;
}
@@ -99,39 +92,26 @@ sx_maxsockbuf(int s, int dir)
sx_report(SX_ERROR,"getsockopt failed: %s\n",
strerror(errno));
return -1;
} else if (voptval < optval) {
if (phase == 0) {
} else if (voptval < optval) {
if (phase == 0) {
phase = 1;
optval >>= 1;
continue;
} else if (phase == 1) {
} else if (phase == 1) {
phase = 2;
optval -= 2048;
continue;
} else
break;
} else if (voptval >= SX_MAXSOCKBUF_MAX) {
/*
* ... and getsockopt not failed and voptval>=optval.
* Do not allow to increase sockbuf too much even in
* case OS permits it
*/
break;
}
}
voptlen = sizeof(voptval);
if (getsockopt(s, SOL_SOCKET, dir, (void*)&voptval,
&voptlen) == -1) {
sx_report(SX_ERROR,"getsockopt(final stage) failed: %s\n",
sx_report(SX_ERROR,"getsockopt(final stage) failed: %s\n",
strerror(errno));
return -1;
} else {
/*
printf("Finally got %i bytes of recvspace in %i interations\n",
voptval, iterations);
*/
}
return voptval;
} else
return voptval;
}