From 55a9ba1fc00a68fb83ad0b24878db815e68b546a Mon Sep 17 00:00:00 2001
From: Isaac Andrade <andradei@proton.me>
Date: Wed, 11 Sep 2024 22:25:38 -0600
Subject: [PATCH] Finish sys/socket POSIX support for Linux.

---
 core/sys/posix/sys_socket.odin | 126 +++++++++++++++++++++------------
 1 file changed, 79 insertions(+), 47 deletions(-)

diff --git a/core/sys/posix/sys_socket.odin b/core/sys/posix/sys_socket.odin
index 1f228c396..185bb7722 100644
--- a/core/sys/posix/sys_socket.odin
+++ b/core/sys/posix/sys_socket.odin
@@ -382,6 +382,12 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS
 			msg_controllen: c.size_t,  /* [PSX] ancillary data buffer length */
 			msg_flags:      Msg_Flags, /* [PSX] flags on received message */
 		}
+
+		cmsghdr :: struct {
+			cmsg_len:   c.size_t, /* [PSX] data byte count, including cmsghdr */
+			cmsg_level: c.int,     /* [PSX] originating protocol */
+			cmsg_type:  c.int,     /* [PSX] protocol-specific type */
+		}
 	} else {
 		sockaddr_storage :: struct {
 			ss_len:     c.uint8_t,            /* address length */
@@ -400,13 +406,12 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS
 			msg_controllen: socklen_t, /* [PSX] ancillary data buffer length */
 			msg_flags:      Msg_Flags, /* [PSX] flags on received message */
 		}
-	}
 
-
-	cmsghdr :: struct {
-		cmsg_len:   socklen_t, /* [PSX] data byte count, including cmsghdr */
-		cmsg_level: c.int,     /* [PSX] originating protocol */
-		cmsg_type:  c.int,     /* [PSX] protocol-specific type */
+		cmsghdr :: struct {
+			cmsg_len:   socklen_t, /* [PSX] data byte count, including cmsghdr */
+			cmsg_level: c.int,     /* [PSX] originating protocol */
+			cmsg_type:  c.int,     /* [PSX] protocol-specific type */
+		}
 	}
 
 	SCM_RIGHTS :: 0x01
@@ -456,51 +461,78 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS
 	SOCK_STREAM    :: 1
 
 	// Options to be accessed at socket level, not protocol level.
-	SOL_SOCKET :: 0xffff
+	when ODIN_OS == .Linux {
+		SOL_SOCKET :: 1
 
-	SO_ACCEPTCONN :: 0x0002
-	SO_BROADCAST  :: 0x0020
-	SO_DEBUG      :: 0x0001
-	SO_DONTROUTE  :: 0x0010
-	SO_ERROR      :: 0x1007
-	SO_KEEPALIVE  :: 0x0008
-	SO_OOBINLINE  :: 0x0100
-	SO_RCVBUF     :: 0x1002
-	SO_RCVLOWAT   :: 0x1004
-	SO_REUSEADDR  :: 0x0004
-	SO_SNDBUF     :: 0x1001
-	SO_SNDLOWAT   :: 0x1003
-	SO_TYPE       :: 0x1008
+		SO_ACCEPTCONN :: 30
+		SO_BROADCAST  :: 6
+		SO_DEBUG      :: 1
+		SO_DONTROUTE  :: 5
+		SO_ERROR      :: 4
+		SO_KEEPALIVE  :: 9
+		SO_OOBINLINE  :: 10
+		SO_RCVBUF     :: 8
+		SO_RCVLOWAT   :: 18
+		SO_REUSEADDR  :: 2
+		SO_SNDBUF     :: 7
+		SO_SNDLOWAT   :: 19
+		SO_TYPE       :: 3
+		SO_LINGER     :: 13
 
-	when ODIN_OS == .Darwin {
-		SO_LINGER   :: 0x1080
-		SO_RCVTIMEO :: 0x1006
-		SO_SNDTIMEO :: 0x1005
-	} else when ODIN_OS == .FreeBSD {
-		SO_LINGER   :: 0x0080
-		SO_RCVTIMEO :: 0x1006
-		SO_SNDTIMEO :: 0x1005
-	} else when ODIN_OS == .NetBSD {
-		SO_LINGER   :: 0x0080
-		SO_RCVTIMEO :: 0x100c
-		SO_SNDTIMEO :: 0x100b
-	} else when ODIN_OS == .OpenBSD {
-		SO_LINGER   :: 0x0080
-		SO_RCVTIMEO :: 0x1006
-		SO_SNDTIMEO :: 0x1005
+		SO_RCVTIMEO   :: 66
+		SO_SNDTIMEO   :: 67
+	} else {
+		SOL_SOCKET :: 0xffff
+
+		SO_ACCEPTCONN :: 0x0002
+		SO_BROADCAST  :: 0x0020
+		SO_DEBUG      :: 0x0001
+		SO_DONTROUTE  :: 0x0010
+		SO_ERROR      :: 0x1007
+		SO_KEEPALIVE  :: 0x0008
+		SO_OOBINLINE  :: 0x0100
+		SO_RCVBUF     :: 0x1002
+		SO_RCVLOWAT   :: 0x1004
+		SO_REUSEADDR  :: 0x0004
+		SO_SNDBUF     :: 0x1001
+		SO_SNDLOWAT   :: 0x1003
+		SO_TYPE       :: 0x1008
+
+		when ODIN_OS == .Darwin {
+			SO_LINGER   :: 0x1080
+			SO_RCVTIMEO :: 0x1006
+			SO_SNDTIMEO :: 0x1005
+		} else when ODIN_OS == .FreeBSD {
+			SO_LINGER   :: 0x0080
+			SO_RCVTIMEO :: 0x1006
+			SO_SNDTIMEO :: 0x1005
+		} else when ODIN_OS == .NetBSD {
+			SO_LINGER   :: 0x0080
+			SO_RCVTIMEO :: 0x100c
+			SO_SNDTIMEO :: 0x100b
+		} else when ODIN_OS == .OpenBSD {
+			SO_LINGER   :: 0x0080
+			SO_RCVTIMEO :: 0x1006
+			SO_SNDTIMEO :: 0x1005
+		}
 	}
 
 	// The maximum backlog queue length for listen().
-	SOMAXCONN :: 128
+	when ODIN_OS == .Linux {
+		SOMAXCONN :: 4096
+	} else {
+		SOMAXCONN :: 128
+	}
 
 	when ODIN_OS == .Linux {
-		MSG_CTRUNC    :: 0x007
+		MSG_CTRUNC    :: 0x008
 		MSG_DONTROUTE :: 0x004
 		MSG_EOR       :: 0x080
 		MSG_OOB       :: 0x001
 		MSG_PEEK      :: 0x002
 		MSG_TRUNC     :: 0x020
 		MSG_WAITALL   :: 0x100
+		MSG_NOSIGNAL  :: 0x4000
 	} else {
 		MSG_CTRUNC    :: 0x20
 		MSG_DONTROUTE :: 0x4
@@ -509,16 +541,14 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS
 		MSG_PEEK      :: 0x2
 		MSG_TRUNC     :: 0x10
 		MSG_WAITALL   :: 0x40
-	}
 
-	when ODIN_OS == .Darwin {
-		MSG_NOSIGNAL :: 0x80000
-	} else when ODIN_OS == .FreeBSD {
-		MSG_NOSIGNAL :: 0x00020000
-	} else when ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD {
-		MSG_NOSIGNAL :: 0x0400
-	} else when ODIN_OS == .Linux {
-		MSG_NOSIGNAL  :: 0x4000
+		when ODIN_OS == .Darwin {
+			MSG_NOSIGNAL :: 0x80000
+		} else when ODIN_OS == .FreeBSD {
+			MSG_NOSIGNAL :: 0x00020000
+		} else when ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD {
+			MSG_NOSIGNAL :: 0x0400
+		}
 	}
 
 	AF_INET   :: 2
@@ -530,6 +560,8 @@ when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS
 		AF_INET6 :: 28
 	} else when ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD {
 		AF_INET6 :: 24
+	} else when ODIN_OS == .Linux {
+		AF_INET6 :: 10
 	}
 
 	SHUT_RD   :: 0