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CLEANUP: socket: replace SOL_IP/IPV6/TCP with IPPROTO_IP/IPV6/TCP

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Historically we've used SOL_IP/SOL_IPV6/SOL_TCP everywhere as the socket
level value in getsockopt() and setsockopt() but as we've seen over time
it regularly broke the build and required to have them defined to their
IPPROTO_* equivalent. The Linux ip(7) man page says:

   Using the SOL_IP socket options level isn't portable; BSD-based
   stacks use the IPPROTO_IP level.

And it indeed looks like a pure linuxism inherited from old examples and
documentation. strace also reports SOL_* instead of IPPROTO_*, which does
not help... A check to linux/in.h shows they have the same values. Only
SOL_SOCKET and other non-IP values make sense since there is no IPPROTO
equivalent.

Let's get rid of this annoying confusion by removing all redefinitions of
SOL_IP/IPV6/TCP and using IPPROTO_* instead, just like any other operating
system. This also removes duplicated tests for the same value.

Note that this should not result in exposing syscalls to other OSes
as the only ones that were still conditionned to SOL_IPV6 were for
IPV6_UNICAST_HOPS which already had an IPPROTO_IPV6 equivalent, and
IPV6_TRANSPARENT which is Linux-specific.
This commit is contained in:
Willy Tarreau 2021-03-31 08:45:47 +02:00
parent da23195785
commit 4bfc6630ba
7 changed files with 19 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
contrib/tcploop/tcploop.c
View File

@ -50,10 +50,6 @@
#include <time.h>
#include <unistd.h>
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
#endif
#ifndef MSG_MORE
#define MSG_MORE 0
#endif
@ -316,7 +312,7 @@ int wait_on_fd(int fd, int events)
int tcp_set_nodelay(int sock, const char *arg)
{
return setsockopt(sock, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
return setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one));
}
int tcp_set_nolinger(int sock, const char *arg)
@ -328,7 +324,7 @@ int tcp_set_noquickack(int sock, const char *arg)
{
#ifdef TCP_QUICKACK
/* warning: do not use during connect if nothing is to be sent! */
return setsockopt(sock, SOL_TCP, TCP_QUICKACK, &zero, sizeof(zero));
return setsockopt(sock, IPPROTO_TCP, TCP_QUICKACK, &zero, sizeof(zero));
#else
return 0;
#endif

10
include/haproxy/compat.h
View File

@ -215,16 +215,6 @@ typedef struct { } empty_t;
#endif
#endif
/* FreeBSD doesn't define SOL_IP and prefers IPPROTO_IP */
#ifndef SOL_IP
#define SOL_IP IPPROTO_IP
#endif
/* same for SOL_TCP */
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
#endif
/* If IPv6 is supported, define IN6_IS_ADDR_V4MAPPED() if missing. */
#if defined(IPV6_TCLASS) && !defined(IN6_IS_ADDR_V4MAPPED)
#define IN6_IS_ADDR_V4MAPPED(a) \

2
src/proto_quic.c
View File

@ -406,7 +406,7 @@ int quic_connect_server(struct connection *conn, int flags)
else {
#ifdef IP_BIND_ADDRESS_NO_PORT
static THREAD_LOCAL int bind_address_no_port = 1;
setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
setsockopt(fd, IPPROTO_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
#endif
ret = quic_bind_socket(fd, flags, &src->source_addr, conn->src);
if (ret != 0)

2
src/proto_tcp.c
View File

@ -443,7 +443,7 @@ int tcp_connect_server(struct connection *conn, int flags)
else {
#ifdef IP_BIND_ADDRESS_NO_PORT
static THREAD_LOCAL int bind_address_no_port = 1;
setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
setsockopt(fd, IPPROTO_IP, IP_BIND_ADDRESS_NO_PORT, (const void *) &bind_address_no_port, sizeof(int));
#endif
ret = tcp_bind_socket(fd, flags, &src->source_addr, conn->src);
if (ret != 0)

22
src/sock_inet.c
View File

@ -154,7 +154,7 @@ int sock_inet_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
* other families because v6-mapped IPv4 addresses are still
* reported as v4.
*/
if (getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
if (getsockopt(fd, IPPROTO_IP, SO_ORIGINAL_DST, sa, &salen) == 0)
return 0;
#endif
return ret;
@ -174,12 +174,12 @@ int sock_inet_is_foreign(int fd, sa_family_t family)
case AF_INET:
#if defined(IP_TRANSPARENT)
val = 0; len = sizeof(val);
if (getsockopt(fd, SOL_IP, IP_TRANSPARENT, &val, &len) == 0 && val)
if (getsockopt(fd, IPPROTO_IP, IP_TRANSPARENT, &val, &len) == 0 && val)
return 1;
#endif
#if defined(IP_FREEBIND)
val = 0; len = sizeof(val);
if (getsockopt(fd, SOL_IP, IP_FREEBIND, &val, &len) == 0 && val)
if (getsockopt(fd, IPPROTO_IP, IP_FREEBIND, &val, &len) == 0 && val)
return 1;
#endif
#if defined(IP_BINDANY)
@ -195,14 +195,14 @@ int sock_inet_is_foreign(int fd, sa_family_t family)
break;
case AF_INET6:
#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
#if defined(IPV6_TRANSPARENT)
val = 0; len = sizeof(val);
if (getsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &val, &len) == 0 && val)
if (getsockopt(fd, IPPROTO_IPV6, IPV6_TRANSPARENT, &val, &len) == 0 && val)
return 1;
#endif
#if defined(IP_FREEBIND)
val = 0; len = sizeof(val);
if (getsockopt(fd, SOL_IP, IP_FREEBIND, &val, &len) == 0 && val)
if (getsockopt(fd, IPPROTO_IP, IP_FREEBIND, &val, &len) == 0 && val)
return 1;
#endif
#if defined(IPV6_BINDANY)
@ -229,10 +229,10 @@ int sock_inet4_make_foreign(int fd)
{
return
#if defined(IP_TRANSPARENT)
setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0 ||
setsockopt(fd, IPPROTO_IP, IP_TRANSPARENT, &one, sizeof(one)) == 0 ||
#endif
#if defined(IP_FREEBIND)
setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0 ||
setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)) == 0 ||
#endif
#if defined(IP_BINDANY)
setsockopt(fd, IPPROTO_IP, IP_BINDANY, &one, sizeof(one)) == 0 ||
@ -251,11 +251,11 @@ int sock_inet4_make_foreign(int fd)
int sock_inet6_make_foreign(int fd)
{
return
#if defined(IPV6_TRANSPARENT) && defined(SOL_IPV6)
setsockopt(fd, SOL_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0 ||
#if defined(IPV6_TRANSPARENT)
setsockopt(fd, IPPROTO_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)) == 0 ||
#endif
#if defined(IP_FREEBIND)
setsockopt(fd, SOL_IP, IP_FREEBIND, &one, sizeof(one)) == 0 ||
setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)) == 0 ||
#endif
#if defined(IPV6_BINDANY)
setsockopt(fd, IPPROTO_IPV6, IPV6_BINDANY, &one, sizeof(one)) == 0 ||

11
src/tcp_act.c
View File

@ -182,7 +182,7 @@ static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct
/* re-enable quickack if it was disabled to ack all data and avoid
* retransmits from the client that might trigger a real reset.
*/
setsockopt(conn->handle.fd, SOL_TCP, TCP_QUICKACK, &one, sizeof(one));
setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
#endif
/* lingering must absolutely be disabled so that we don't send a
* shutdown(), this is critical to the TCP_REPAIR trick. When no stream
@ -197,7 +197,7 @@ static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct
fdtab[conn->handle.fd].linger_risk = 1;
#ifdef TCP_REPAIR
if (setsockopt(conn->handle.fd, SOL_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
if (setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_REPAIR, &one, sizeof(one)) == 0) {
/* socket will be quiet now */
goto out;
}
@ -208,16 +208,11 @@ static enum act_return tcp_exec_action_silent_drop(struct act_rule *rule, struct
*/
#ifdef IP_TTL
if (conn->src && conn->src->ss_family == AF_INET)
setsockopt(conn->handle.fd, SOL_IP, IP_TTL, &one, sizeof(one));
setsockopt(conn->handle.fd, IPPROTO_IP, IP_TTL, &one, sizeof(one));
#endif
#ifdef IPV6_UNICAST_HOPS
#if defined(SOL_IPV6)
if (conn->src && conn->src->ss_family == AF_INET6)
setsockopt(conn->handle.fd, SOL_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
#elif defined(IPPROTO_IPV6)
if (conn->src && conn->src->ss_family == AF_INET6)
setsockopt(conn->handle.fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
#endif
#endif
out:
/* kill the stream if any */

2
src/tcp_sample.c
View File

@ -260,7 +260,7 @@ static inline int get_tcp_info(const struct arg *args, struct sample *smp,
/* The fd may not be available for the tcp_info struct, and the
syscal can fail. */
optlen = sizeof(info);
if (getsockopt(conn->handle.fd, SOL_TCP, TCP_INFO, &info, &optlen) == -1)
if (getsockopt(conn->handle.fd, IPPROTO_TCP, TCP_INFO, &info, &optlen) == -1)
return 0;
/* extract the value. */