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tcpkeepalive: support setting TCP keep-alive parameters on Solaris <11.4

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Solaris didn't support TCP_KEEPIDLE and TCP_KEEPINTVL until 11.4,
before that it use TCP_KEEPALIVE_THRESHOLD and TCP_KEEPALIVE_ABORT_THRESHOLD
as the substitute. Therefore, for Solaris <11.4 we need to use this substitute
for setting TCP keep-alive parameters.

Ref:
https://docs.oracle.com/cd/E86824_01/html/E54777/tcp-7p.html
https://docs.oracle.com/cd/E88353_01/html/E37851/tcp-4p.html

Closes #13864
This commit is contained in:
Andy Pan 2024-06-03 15:15:55 +08:00 • committed by Daniel Stenberg
parent 4edbd52267
commit f51fa8f169
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2 changed files with 38 additions and 5 deletions
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34
lib/cf-socket.c
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@ -143,8 +143,10 @@ static void nosigpipe(struct Curl_easy *data,
#endif
#if defined(USE_WINSOCK) || \
(defined(__sun) && !defined(TCP_KEEPIDLE)) || \
(defined(__DragonFly__) && __DragonFly_version < 500702)
/* DragonFlyBSD < 500702 and Windows use millisecond units */
/* Solaris < 11.4, DragonFlyBSD < 500702 and Windows
* use millisecond units. */
#define KEEPALIVE_FACTOR(x) (x *= 1000)
#else
#define KEEPALIVE_FACTOR(x)
@ -210,6 +212,16 @@ tcpkeepalive(struct Curl_easy *data,
"%" CURL_FORMAT_SOCKET_T ": errno %d",
sockfd, SOCKERRNO);
}
#elif defined(TCP_KEEPALIVE_THRESHOLD)
/* Solaris <11.4 style */
optval = curlx_sltosi(data->set.tcp_keepidle);
KEEPALIVE_FACTOR(optval);
if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE_THRESHOLD,
(void *)&optval, sizeof(optval)) < 0) {
infof(data, "Failed to set TCP_KEEPALIVE_THRESHOLD on fd "
"%" CURL_FORMAT_SOCKET_T ": errno %d",
sockfd, SOCKERRNO);
}
#endif
#ifdef TCP_KEEPINTVL
optval = curlx_sltosi(data->set.tcp_keepintvl);
@ -220,6 +232,26 @@ tcpkeepalive(struct Curl_easy *data,
"%" CURL_FORMAT_SOCKET_T ": errno %d",
sockfd, SOCKERRNO);
}
#elif defined(TCP_KEEPALIVE_ABORT_THRESHOLD)
/* Solaris <11.4 style */
/* TCP_KEEPALIVE_ABORT_THRESHOLD should equal to
* TCP_KEEPCNT * TCP_KEEPINTVL on other platforms.
* The default value of TCP_KEEPCNT is 9 on Linux,
* 8 on *BSD/macOS, 5 or 10 on Windows. We choose
* 9 for Solaris <11.4 because there is no default
* value for TCP_KEEPCNT on Solaris 11.4.
*
* Note that the consequent probes will not be sent
* at equal intervals on Solaris, but will be sent
* using the exponential backoff algorithm. */
optval = 9 * curlx_sltosi(data->set.tcp_keepintvl);
KEEPALIVE_FACTOR(optval);
if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE_ABORT_THRESHOLD,
(void *)&optval, sizeof(optval)) < 0) {
infof(data, "Failed to set TCP_KEEPALIVE_ABORT_THRESHOLD on fd "
"%" CURL_FORMAT_SOCKET_T ": errno %d",
sockfd, SOCKERRNO);
}
#endif
#endif
}