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Support keepalive for connections on the connecting side

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This commit is contained in:
Yves Rutschle 2016-02-04 09:19:54 +01:00
parent 1b9937b293
commit 414ed7de11
5 changed files with 25 additions and 15 deletions
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1
ChangeLog
View File

@ -15,6 +15,7 @@ vNEXT:
Added 'log_level' option to each protocol, which
allows to turn off generation of log at each
connection.
Added 'keepalive' option.
v1.17: 09MAR2015
Support RFC5952-style IPv6 addresses, e.g. [::]:443.

8
common.c
View File

@ -155,7 +155,7 @@ int connect_addr(struct connection *cnx, int fd_from)
struct addrinfo *a, from;
struct sockaddr_storage ss;
char buf[NI_MAXHOST];
int fd, res;
int fd, res, one;
memset(&from, 0, sizeof(from));
from.ai_addr = (struct sockaddr*)&ss;
@ -189,6 +189,12 @@ int connect_addr(struct connection *cnx, int fd_from)
cnx->proto->description, strerror(errno));
close(fd);
} else {
if (cnx->proto->keepalive) {
one = 1;
res = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char*)&one, sizeof(one));
CHECK_RES_RETURN(res, "setsockopt(SO_KEEPALIVE)");
printf("set up keepalive\n");
}
return fd;
}
}

20
probe.c
View File

@ -45,16 +45,16 @@ static int is_true(const char *p, int len, struct proto* proto) { return 1; }
/* Table of protocols that have a built-in probe
*/
static struct proto builtins[] = {
/* description service saddr log_level probe */
{ "ssh", "sshd", NULL, 1, is_ssh_protocol},
{ "openvpn", NULL, NULL, 1, is_openvpn_protocol },
{ "tinc", NULL, NULL, 1, is_tinc_protocol },
{ "xmpp", NULL, NULL, 1, is_xmpp_protocol },
{ "http", NULL, NULL, 1, is_http_protocol },
{ "ssl", NULL, NULL, 1, is_tls_protocol },
{ "tls", NULL, NULL, 1, is_tls_protocol },
{ "adb", NULL, NULL, 1, is_adb_protocol },
{ "anyprot", NULL, NULL, 1, is_true }
/* description service saddr log_level keepalive probe */
{ "ssh", "sshd", NULL, 1, 0, is_ssh_protocol},
{ "openvpn", NULL, NULL, 1, 0, is_openvpn_protocol },
{ "tinc", NULL, NULL, 1, 0, is_tinc_protocol },
{ "xmpp", NULL, NULL, 1, 0, is_xmpp_protocol },
{ "http", NULL, NULL, 1, 0, is_http_protocol },
{ "ssl", NULL, NULL, 1, 0, is_tls_protocol },
{ "tls", NULL, NULL, 1, 0, is_tls_protocol },
{ "adb", NULL, NULL, 1, 0, is_adb_protocol },
{ "anyprot", NULL, NULL, 1, 0, is_true }
};
static struct proto *protocols;

1
probe.h
View File

@ -23,6 +23,7 @@ struct proto {
int log_level; /* 0: No logging of connection
* 1: Log incoming connection
*/
int keepalive; /* 0: No keepalive ; 1: Set Keepalive for this connection */
/* function to probe that protocol; parameters are buffer and length
* containing the data to probe, and a pointer to the protocol structure */

10
sslh-main.c
View File

@ -123,20 +123,21 @@ static void printsettings(void)
for (p = get_first_protocol(); p; p = p->next) {
fprintf(stderr,
"%s addr: %s. libwrap service: %s log_level: %d family %d %d\n",
"%s addr: %s. libwrap service: %s log_level: %d family %d %d [%s]\n",
p->description,
sprintaddr(buf, sizeof(buf), p->saddr),
p->service,
p->log_level,
p->saddr->ai_family,
p->saddr->ai_addr->sa_family);
p->saddr->ai_addr->sa_family,
p->keepalive ? "keepalive" : "");
}
fprintf(stderr, "listening on:\n");
for (a = addr_listen; a; a = a->ai_next) {
fprintf(stderr,
"\t%s\t[keepalive: %d]\n",
"\t%s\t[%s]\n",
sprintaddr(buf, sizeof(buf), a),
a->ai_flags & SO_KEEPALIVE ? 1 : 0);
a->ai_flags & SO_KEEPALIVE ? "keepalive" : "");
}
fprintf(stderr, "timeout: %d\non-timeout: %s\n", probing_timeout,
timeout_protocol()->description);
@ -299,6 +300,7 @@ static int config_protocols(config_t *config, struct proto **prots)
)) {
p->description = name;
config_setting_lookup_string(prot, "service", &(p->service));
config_setting_lookup_bool(prot, "keepalive", &p->keepalive);
if (config_setting_lookup_int(prot, "log_level", &p->log_level) == CONFIG_FALSE) {
p->log_level = 1;