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Merged nsock-engines from nmap-exp. This rewrite of the nsock library adds

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support for system-specific scalable IO notification facilities without breaking
portability. This initial version comes with an epoll(7)-based engine for Linux
and a select(2)-based fallback engine for all other operating systems.

This required an important refactoring of the library but the external API was
preserved.

The rewrite also tries to bring the coding standards of nmap to nsock.

See http://labs.unix-junkies.org/nsock_engines.html for the details.
This commit is contained in:
henri
2012-01-05 01:08:16 +00:00
parent 15f74d395f
commit 856cd00a17
31 changed files with 4496 additions and 2774 deletions
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34
nsock/src/netutils.c
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@@ -1,4 +1,3 @@
/***************************************************************************
* netutils.c -- This contains some useful little network/socket related *
* utility functions. *
@@ -87,17 +86,15 @@
static int netutils_debugging = 0;
/* maximize the number of file descriptors (including sockets) allowed
for this process and return that maximum value (note -- you better
not actually open this many -- stdin, stdout, other files opened by
libraries you use, etc. all count toward this limit. Leave a
little slack */
/* maximize the number of file descriptors (including sockets) allowed for this
* process and return that maximum value (note -- you better not actually open
* this many -- stdin, stdout, other files opened by libraries you use, etc. all
* count toward this limit. Leave a little slack */
int maximize_fdlimit(void) {
int maximize_fdlimit() {
#ifndef WIN32
struct rlimit r;
static int maxfds = -1;
struct rlimit r;
static int maxfds = -1;
if (maxfds > 0)
return maxfds;
@@ -106,22 +103,31 @@ static int maxfds = -1;
if (!getrlimit(RLIMIT_NOFILE, &r)) {
r.rlim_cur = r.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &r))
if (netutils_debugging) perror("setrlimit RLIMIT_NOFILE failed");
if (netutils_debugging)
perror("setrlimit RLIMIT_NOFILE failed");
if (!getrlimit(RLIMIT_NOFILE, &r)) {
maxfds = r.rlim_cur;
return maxfds;
} else return 0;
} else {
return 0;
}
}
#endif
#if(defined(RLIMIT_OFILE) && !defined(RLIMIT_NOFILE))
if (!getrlimit(RLIMIT_OFILE, &r)) {
r.rlim_cur = r.rlim_max;
if (setrlimit(RLIMIT_OFILE, &r))
if (netutils_debugging) perror("setrlimit RLIMIT_OFILE failed");
if (netutils_debugging)
perror("setrlimit RLIMIT_OFILE failed");
if (!getrlimit(RLIMIT_OFILE, &r)) {
maxfds = r.rlim_cur;
return maxfds;
} else return 0;
} else {
return 0;
}
}
#endif
#endif /* !WIN32 */