diff --git a/lib/std/c.zig b/lib/std/c.zig
index 6576ba1c4647398a8e4ada475465a9dd06b825a1..9dfe59d7336812c0af6005233e70ccacf7ccf9a7 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -6459,7 +6459,7 @@ pub const IPPROTO = switch (native_os) {
         /// dummy for IP
         pub const IP = 0;
         /// IP6 hop-by-hop options
-        pub const HOPOPTS = IP;
+        pub const HOPOPTS = IPPROTO.IP;
         /// control message protocol
         pub const ICMP = 1;
         /// group mgmt protocol
@@ -6541,6 +6541,39 @@ pub const IPPROTO = switch (native_os) {
     },
     else => void,
 };
+pub const IP = switch (native_os) {
+    .linux => linux.IP,
+    .freebsd => freebsd.IP,
+    .dragonfly => dragonfly.IP,
+    .netbsd => netbsd.IP,
+    .openbsd => openbsd.IP,
+    .solaris, .illumos => solaris.IP,
+    .haiku => haiku.IP,
+    .serenity => serenity.IP,
+    else => void,
+};
+pub const IPV6 = switch (native_os) {
+    .linux => linux.IPV6,
+    .freebsd => freebsd.IPV6,
+    .dragonfly => dragonfly.IPV6,
+    .netbsd => netbsd.IPV6,
+    .openbsd => openbsd.IPV6,
+    .solaris, .illumos => solaris.IPV6,
+    .haiku => haiku.IPV6,
+    .serenity => serenity.IPV6,
+    else => void,
+};
+pub const IPTOS = switch (native_os) {
+    .linux => linux.IPTOS,
+    .freebsd => freebsd.IPTOS,
+    .dragonfly => dragonfly.IPTOS,
+    .netbsd => netbsd.IPTOS,
+    .openbsd => openbsd.IPTOS,
+    .solaris, .illumos => solaris.IPTOS,
+    .haiku => haiku.IPTOS,
+    .serenity => serenity.IPTOS,
+    else => void,
+};
 pub const SOL = switch (native_os) {
     .linux => linux.SOL,
     .emscripten => emscripten.SOL,
diff --git a/lib/std/c/darwin.zig b/lib/std/c/darwin.zig
index 255bf03280f7aceaf6c6be4961c9b3134b60a94f..aa0ad4e577f1a0c8e392de10c735fc1409728b4a 100644
--- a/lib/std/c/darwin.zig
+++ b/lib/std/c/darwin.zig
@@ -1724,3 +1724,165 @@ pub const MSG = struct {
     /// Inherit upcall in sock_accept
     pub const USEUPCALL = 0x80000000;
 };
+
+// https://github.com/apple/darwin-xnu/blob/2ff845c2e033bd0ff64b5b6aa6063a1f8f65aa32/bsd/netinet/in.h#L454
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 5;
+    pub const RECVRETOPTS = 6;
+    pub const RECVDSTADDR = 7;
+    pub const RETOPTS = 8;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_TTL = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const ADD_MEMBERSHIP = 12;
+    pub const DROP_MEMBERSHIP = 13;
+    pub const MULTICAST_VIF = 14;
+    pub const RSVP_ON = 15;
+    pub const RSVP_OFF = 16;
+    pub const RSVP_VIF_ON = 17;
+    pub const RSVP_VIF_OFF = 18;
+    pub const PORTRANGE = 19;
+    pub const RECVIF = 20;
+    pub const IPSEC_POLICY = 21;
+    pub const FAITH = 22;
+    pub const STRIPHDR = 23;
+    pub const RECVTTL = 24;
+    pub const BOUND_IF = 25;
+    pub const PKTINFO = 26;
+    pub const RECVPKTINFO = PKTINFO;
+    pub const RECVTOS = 27;
+    pub const DONTFRAG = 28;
+    pub const FW_ADD = 40;
+    pub const FW_DEL = 41;
+    pub const FW_FLUSH = 42;
+    pub const FW_ZERO = 43;
+    pub const FW_GET = 44;
+    pub const FW_RESETLOG = 45;
+    pub const OLD_FW_ADD = 50;
+    pub const OLD_FW_DEL = 51;
+    pub const OLD_FW_FLUSH = 52;
+    pub const OLD_FW_ZERO = 53;
+    pub const OLD_FW_GET = 54;
+    pub const OLD_FW_RESETLOG = 56;
+    pub const DUMMYNET_CONFIGURE = 60;
+    pub const DUMMYNET_DEL = 61;
+    pub const DUMMYNET_FLUSH = 62;
+    pub const DUMMYNET_GET = 64;
+    pub const TRAFFIC_MGT_BACKGROUND = 65;
+    pub const MULTICAST_IFINDEX = 66;
+    pub const ADD_SOURCE_MEMBERSHIP = 70;
+    pub const DROP_SOURCE_MEMBERSHIP = 71;
+    pub const BLOCK_SOURCE = 72;
+    pub const UNBLOCK_SOURCE = 73;
+    pub const MSFILTER = 74;
+    // Same namespace, but these are arguments rather than option names
+    pub const DEFAULT_MULTICAST_TTL = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MIN_MEMBERSHIPS = 31;
+    pub const MAX_MEMBERSHIPS = 4095;
+    pub const MAX_GROUP_SRC_FILTER = 512;
+    pub const MAX_SOCK_SRC_FILTER = 128;
+    pub const MAX_SOCK_MUTE_FILTER = 128;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/apple/darwin-xnu/blob/2ff845c2e033bd0ff64b5b6aa6063a1f8f65aa32/bsd/netinet6/in6.h#L521
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 4;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_HOPS = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const JOIN_GROUP = 12;
+    pub const LEAVE_GROUP = 13;
+    pub const PORTRANGE = 14;
+    pub const @"2292PKTINFO" = 19;
+    pub const @"2292HOPLIMIT" = 20;
+    pub const @"2292NEXTHOP" = 21;
+    pub const @"2292HOPOPTS" = 22;
+    pub const @"2292DSTOPTS" = 23;
+    pub const @"2292RTHDR" = 24;
+    pub const @"2292PKTOPTIONS" = 25;
+    pub const CHECKSUM = 26;
+    pub const V6ONLY = 27;
+    pub const BINDV6ONLY = V6ONLY;
+    pub const IPSEC_POLICY = 28;
+    pub const FAITH = 29;
+    pub const FW_ADD = 30;
+    pub const FW_DEL = 31;
+    pub const FW_FLUSH = 32;
+    pub const FW_ZERO = 33;
+    pub const FW_GET = 34;
+    pub const RECVTCLASS = 35;
+    pub const TCLASS = 36;
+    pub const RTHDRDSTOPTS = 57;
+    pub const RECVPKTINFO = 61;
+    pub const RECVHOPLIMIT = 37;
+    pub const RECVRTHDR = 38;
+    pub const RECVHOPOPTS = 39;
+    pub const RECVDSTOPTS = 40;
+    pub const RECVRTHDRDSTOPTS = 41;
+    pub const USE_MIN_MTU = 42;
+    pub const RECVPATHMTU = 43;
+    pub const PATHMTU = 44;
+    pub const REACHCONF = 45;
+    pub const @"3542PKTINFO" = 46;
+    pub const @"3542HOPLIMIT" = 47;
+    pub const @"3542NEXTHOP" = 48;
+    pub const @"3542HOPOPTS" = 49;
+    pub const @"3542DSTOPTS" = 50;
+    pub const @"3542RTHDR" = 51;
+    pub const PKTINFO = @"3542PKTINFO";
+    pub const HOPLIMIT = @"3542HOPLIMIT";
+    pub const NEXTHOP = @"3542NEXTHOP";
+    pub const HOPOPTS = @"3542HOPOPTS";
+    pub const DSTOPTS = @"3542DSTOPTS";
+    pub const RTHDR = @"3542RTHDR";
+    pub const AUTOFLOWLABEL = 59;
+    pub const DONTFRAG = 62;
+    pub const PREFER_TEMPADDR = 63;
+    pub const MSFILTER = 74;
+    pub const BOUND_IF = 125;
+    // Same namespace, but these are arguments rather than option names
+    pub const RTHDR_LOOSE = 0;
+    pub const RTHDR_STRICT = 1;
+    pub const RTHDR_TYPE_0 = 0;
+    pub const DEFAULT_MULTICAST_HOPS = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MIN_MEMBERSHIPS = 31;
+    pub const MAX_MEMBERSHIPS = 4095;
+    pub const MAX_GROUP_SRC_FILTER = 512;
+    pub const MAX_SOCK_SRC_FILTER = 128;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/apple/darwin-xnu/blob/2ff845c2e033bd0ff64b5b6aa6063a1f8f65aa32/bsd/netinet/ip.h#L129
+pub const IPTOS = struct {
+    pub const LOWDELAY = 0x10;
+    pub const THROUGHPUT = 0x08;
+    pub const RELIABILITY = 0x04;
+    pub const MINCOST = 0x02;
+    pub const CE = 0x01;
+    pub const ECT = 0x02;
+    pub const DSCP_SHIFT = 2;
+    pub const ECN_NOTECT = 0x00;
+    pub const ECN_ECT1 = 0x01;
+    pub const ECN_ECT0 = 0x02;
+    pub const ECN_CE = 0x03;
+    pub const ECN_MASK = 0x03;
+    pub const PREC_NETCONTROL = 0xe0;
+    pub const PREC_INTERNETCONTROL = 0xc0;
+    pub const PREC_CRITIC_ECP = 0xa0;
+    pub const PREC_FLASHOVERRIDE = 0x80;
+    pub const PREC_FLASH = 0x60;
+    pub const PREC_IMMEDIATE = 0x40;
+    pub const PREC_PRIORITY = 0x20;
+    pub const PREC_ROUTINE = 0x00;
+};
diff --git a/lib/std/c/dragonfly.zig b/lib/std/c/dragonfly.zig
index c06d7ab8f5325d314b22133347b29103a82cbc51..09d2ed6de0e85db512b7864f76da52ddceb3ee3d 100644
--- a/lib/std/c/dragonfly.zig
+++ b/lib/std/c/dragonfly.zig
@@ -182,3 +182,161 @@ pub const POSIX_MADV_RANDOM = 1;
 pub const POSIX_MADV_DONTNEED = 4;
 pub const POSIX_MADV_NORMAL = 0;
 pub const POSIX_MADV_WILLNEED = 3;
+
+// https://github.com/DragonFlyBSD/DragonFlyBSD/blob/6098912863ed4c7b3f70d7483910ce2956cf4ed3/sys/netinet/ip.h#L94
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 5;
+    pub const RECVRETOPTS = 6;
+    pub const RECVDSTADDR = 7;
+    pub const SENDSRCADDR = RECVDSTADDR;
+    pub const RETOPTS = 8;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_TTL = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const ADD_MEMBERSHIP = 12;
+    pub const DROP_MEMBERSHIP = 13;
+    pub const MULTICAST_VIF = 14;
+    pub const RSVP_ON = 15;
+    pub const RSVP_OFF = 16;
+    pub const RSVP_VIF_ON = 17;
+    pub const RSVP_VIF_OFF = 18;
+    pub const PORTRANGE = 19;
+    pub const RECVIF = 20;
+    pub const FW_TBL_CREATE = 40;
+    pub const FW_TBL_DESTROY = 41;
+    pub const FW_TBL_ADD = 42;
+    pub const FW_TBL_DEL = 43;
+    pub const FW_TBL_FLUSH = 44;
+    pub const FW_TBL_GET = 45;
+    pub const FW_TBL_ZERO = 46;
+    pub const FW_TBL_EXPIRE = 47;
+    pub const FW_X = 49;
+    pub const FW_ADD = 50;
+    pub const FW_DEL = 51;
+    pub const FW_FLUSH = 52;
+    pub const FW_ZERO = 53;
+    pub const FW_GET = 54;
+    pub const FW_RESETLOG = 55;
+    pub const DUMMYNET_CONFIGURE = 60;
+    pub const DUMMYNET_DEL = 61;
+    pub const DUMMYNET_FLUSH = 62;
+    pub const DUMMYNET_GET = 64;
+    pub const RECVTTL = 65;
+    pub const MINTTL = 66;
+    pub const RECVTOS = 68;
+    // Same namespace, but these are arguments rather than option names
+    pub const DEFAULT_MULTICAST_TTL = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MAX_MEMBERSHIPS = 20;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/DragonFlyBSD/DragonFlyBSD/blob/6098912863ed4c7b3f70d7483910ce2956cf4ed3/sys/netinet6/in6.h#L448
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 4;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_HOPS = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const JOIN_GROUP = 12;
+    pub const LEAVE_GROUP = 13;
+    pub const PORTRANGE = 14;
+    pub const @"2292PKTINFO" = 19;
+    pub const @"2292HOPLIMIT" = 20;
+    pub const @"2292NEXTHOP" = 21;
+    pub const @"2292HOPOPTS" = 22;
+    pub const @"2292DSTOPTS" = 23;
+    pub const @"2292RTHDR" = 24;
+    pub const @"2292PKTOPTIONS" = 25;
+    pub const CHECKSUM = 26;
+    pub const V6ONLY = 27;
+    pub const BINDV6ONLY = V6ONLY;
+    pub const FW_ADD = 30;
+    pub const FW_DEL = 31;
+    pub const FW_FLUSH = 32;
+    pub const FW_ZERO = 33;
+    pub const FW_GET = 34;
+    pub const RTHDRDSTOPTS = 35;
+    pub const RECVPKTINFO = 36;
+    pub const RECVHOPLIMIT = 37;
+    pub const RECVRTHDR = 38;
+    pub const RECVHOPOPTS = 39;
+    pub const RECVDSTOPTS = 40;
+    pub const RECVRTHDRDSTOPTS = 41;
+    pub const USE_MIN_MTU = 42;
+    pub const RECVPATHMTU = 43;
+    pub const PATHMTU = 44;
+    pub const REACHCONF = 45;
+    pub const PKTINFO = 46;
+    pub const HOPLIMIT = 47;
+    pub const NEXTHOP = 48;
+    pub const HOPOPTS = 49;
+    pub const DSTOPTS = 50;
+    pub const RTHDR = 51;
+    pub const PKTOPTIONS = 52;
+    pub const RECVTCLASS = 57;
+    pub const AUTOFLOWLABEL = 59;
+    pub const TCLASS = 61;
+    pub const DONTFRAG = 62;
+    pub const PREFER_TEMPADDR = 63;
+    pub const MSFILTER = 74;
+    // Same namespace, but these are arguments rather than option names
+    pub const RTHDR_LOOSE = 0;
+    pub const RTHDR_STRICT = 1;
+    pub const RTHDR_TYPE_0 = 0;
+    pub const DEFAULT_MULTICAST_HOPS = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/DragonFlyBSD/DragonFlyBSD/blob/6098912863ed4c7b3f70d7483910ce2956cf4ed3/sys/netinet/ip.h#L94
+pub const IPTOS = struct {
+    pub const LOWDELAY = 0x10;
+    pub const THROUGHPUT = 0x08;
+    pub const RELIABILITY = 0x04;
+    pub const MINCOST = 0x02;
+    pub const CE = 0x01;
+    pub const ECT = 0x02;
+    pub const PREC_ROUTINE = DSCP_CS0;
+    pub const PREC_PRIORITY = DSCP_CS1;
+    pub const PREC_IMMEDIATE = DSCP_CS2;
+    pub const PREC_FLASH = DSCP_CS3;
+    pub const PREC_FLASHOVERRIDE = DSCP_CS4;
+    pub const PREC_CRITIC_ECP = DSCP_CS5;
+    pub const PREC_INTERNETCONTROL = DSCP_CS6;
+    pub const PREC_NETCONTROL = DSCP_CS7;
+    pub const DSCP_CS0 = 0x00;
+    pub const DSCP_CS1 = 0x20;
+    pub const DSCP_AF11 = 0x28;
+    pub const DSCP_AF12 = 0x30;
+    pub const DSCP_AF13 = 0x38;
+    pub const DSCP_CS2 = 0x40;
+    pub const DSCP_AF21 = 0x48;
+    pub const DSCP_AF22 = 0x50;
+    pub const DSCP_AF23 = 0x58;
+    pub const DSCP_CS3 = 0x60;
+    pub const DSCP_AF31 = 0x68;
+    pub const DSCP_AF32 = 0x70;
+    pub const DSCP_AF33 = 0x78;
+    pub const DSCP_CS4 = 0x80;
+    pub const DSCP_AF41 = 0x88;
+    pub const DSCP_AF42 = 0x90;
+    pub const DSCP_AF43 = 0x98;
+    pub const DSCP_CS5 = 0xa0;
+    pub const DSCP_VA = 0xb0;
+    pub const DSCP_EF = 0xb8;
+    pub const DSCP_CS6 = 0xc0;
+    pub const DSCP_CS7 = 0xe0;
+    pub const ECN_NOTECT = 0x00;
+    pub const ECN_ECT1 = 0x01;
+    pub const ECN_ECT0 = 0x02;
+    pub const ECN_CE = 0x03;
+    pub const ECN_MASK = 0x03;
+};
diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index 6fd33c80b716c41127e08dd40c727f59b3323e21..179761b1877aeee809364bb42fa283d37dca03c7 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -391,3 +391,195 @@ pub const E = enum(u16) {
     INTEGRITY = 97, // Integrity check failed
     _,
 };
+
+// https://github.com/freebsd/freebsd-src/blob/9bfbc6826f72eb385bf52f4cde8080bccf7e3ebd/sys/netinet/in.h#L436
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 5;
+    pub const RECVRETOPTS = 6;
+    pub const RECVDSTADDR = 7;
+    pub const SENDSRCADDR = RECVDSTADDR;
+    pub const RETOPTS = 8;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_TTL = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const ADD_MEMBERSHIP = 12;
+    pub const DROP_MEMBERSHIP = 13;
+    pub const MULTICAST_VIF = 14;
+    pub const RSVP_ON = 15;
+    pub const RSVP_OFF = 16;
+    pub const RSVP_VIF_ON = 17;
+    pub const RSVP_VIF_OFF = 18;
+    pub const PORTRANGE = 19;
+    pub const RECVIF = 20;
+    pub const IPSEC_POLICY = 21;
+    pub const ONESBCAST = 23;
+    pub const BINDANY = 24;
+    pub const ORIGDSTADDR = 27;
+    pub const RECVORIGDSTADDR = ORIGDSTADDR;
+    pub const FW_TABLE_ADD = 40;
+    pub const FW_TABLE_DEL = 41;
+    pub const FW_TABLE_FLUSH = 42;
+    pub const FW_TABLE_GETSIZE = 43;
+    pub const FW_TABLE_LIST = 44;
+    pub const FW3 = 48;
+    pub const DUMMYNET3 = 49;
+    pub const FW_ADD = 50;
+    pub const FW_DEL = 51;
+    pub const FW_FLUSH = 52;
+    pub const FW_ZERO = 53;
+    pub const FW_GET = 54;
+    pub const FW_RESETLOG = 55;
+    pub const FW_NAT_CFG = 56;
+    pub const FW_NAT_DEL = 57;
+    pub const FW_NAT_GET_CONFIG = 58;
+    pub const FW_NAT_GET_LOG = 59;
+    pub const DUMMYNET_CONFIGURE = 60;
+    pub const DUMMYNET_DEL = 61;
+    pub const DUMMYNET_FLUSH = 62;
+    pub const DUMMYNET_GET = 64;
+    pub const RECVTTL = 65;
+    pub const MINTTL = 66;
+    pub const DONTFRAG = 67;
+    pub const RECVTOS = 68;
+    pub const ADD_SOURCE_MEMBERSHIP = 70;
+    pub const DROP_SOURCE_MEMBERSHIP = 71;
+    pub const BLOCK_SOURCE = 72;
+    pub const UNBLOCK_SOURCE = 73;
+    pub const MSFILTER = 74;
+    pub const VLAN_PCP = 75;
+    pub const FLOWID = 90;
+    pub const FLOWTYPE = 91;
+    pub const RSSBUCKETID = 92;
+    pub const RECVFLOWID = 93;
+    pub const RECVRSSBUCKETID = 94;
+    // Same namespace, but these are arguments rather than option names
+    pub const DEFAULT_MULTICAST_TTL = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MAX_MEMBERSHIPS = 4095;
+    pub const MAX_GROUP_SRC_FILTER = 512;
+    pub const MAX_SOCK_SRC_FILTER = 128;
+    pub const MAX_SOCK_MUTE_FILTER = 128;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/freebsd/freebsd-src/blob/9bfbc6826f72eb385bf52f4cde8080bccf7e3ebd/sys/netinet6/in6.h#L402
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 4;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_HOPS = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const JOIN_GROUP = 12;
+    pub const LEAVE_GROUP = 13;
+    pub const PORTRANGE = 14;
+    pub const @"2292PKTINFO" = 19;
+    pub const @"2292HOPLIMIT" = 20;
+    pub const @"2292NEXTHOP" = 21;
+    pub const @"2292HOPOPTS" = 22;
+    pub const @"2292DSTOPTS" = 23;
+    pub const @"2292RTHDR" = 24;
+    pub const @"2292PKTOPTIONS" = 25;
+    pub const CHECKSUM = 26;
+    pub const V6ONLY = 27;
+    pub const BINDV6ONLY = V6ONLY;
+    pub const IPSEC_POLICY = 28;
+    pub const FW_ADD = 30;
+    pub const FW_DEL = 31;
+    pub const FW_FLUSH = 32;
+    pub const FW_ZERO = 33;
+    pub const FW_GET = 34;
+    pub const RTHDRDSTOPTS = 35;
+    pub const RECVPKTINFO = 36;
+    pub const RECVHOPLIMIT = 37;
+    pub const RECVRTHDR = 38;
+    pub const RECVHOPOPTS = 39;
+    pub const RECVDSTOPTS = 40;
+    pub const RECVRTHDRDSTOPTS = 41;
+    pub const USE_MIN_MTU = 42;
+    pub const RECVPATHMTU = 43;
+    pub const PATHMTU = 44;
+    pub const REACHCONF = 45;
+    pub const PKTINFO = 46;
+    pub const HOPLIMIT = 47;
+    pub const NEXTHOP = 48;
+    pub const HOPOPTS = 49;
+    pub const DSTOPTS = 50;
+    pub const RTHDR = 51;
+    pub const PKTOPTIONS = 52;
+    pub const RECVTCLASS = 57;
+    pub const AUTOFLOWLABEL = 59;
+    pub const TCLASS = 61;
+    pub const DONTFRAG = 62;
+    pub const PREFER_TEMPADDR = 63;
+    pub const BINDANY = 64;
+    pub const FLOWID = 67;
+    pub const FLOWTYPE = 68;
+    pub const RSSBUCKETID = 69;
+    pub const RECVFLOWID = 70;
+    pub const RECVRSSBUCKETID = 71;
+    pub const ORIGDSTADDR = 72;
+    pub const RECVORIGDSTADDR = ORIGDSTADDR;
+    pub const MSFILTER = 74;
+    pub const VLAN_PCP = 75;
+    // Same namespace, but these are arguments rather than option names
+    pub const RTHDR_LOOSE = 0;
+    pub const RTHDR_STRICT = 1;
+    pub const RTHDR_TYPE_0 = 0;
+    pub const DEFAULT_MULTICAST_HOPS = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MAX_MEMBERSHIPS = 4095;
+    pub const MAX_GROUP_SRC_FILTER = 512;
+    pub const MAX_SOCK_SRC_FILTER = 128;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/freebsd/freebsd-src/blob/9bfbc6826f72eb385bf52f4cde8080bccf7e3ebd/sys/netinet/ip.h#L77
+pub const IPTOS = struct {
+    pub const LOWDELAY = 0x10;
+    pub const THROUGHPUT = 0x08;
+    pub const RELIABILITY = 0x04;
+    pub const MINCOST = DSCP_CS0;
+    pub const PREC_ROUTINE = DSCP_CS0;
+    pub const PREC_PRIORITY = DSCP_CS1;
+    pub const PREC_IMMEDIATE = DSCP_CS2;
+    pub const PREC_FLASH = DSCP_CS3;
+    pub const PREC_FLASHOVERRIDE = DSCP_CS4;
+    pub const PREC_CRITIC_ECP = DSCP_CS5;
+    pub const PREC_INTERNETCONTROL = DSCP_CS6;
+    pub const PREC_NETCONTROL = DSCP_CS7;
+    pub const DSCP_OFFSET = 2;
+    pub const DSCP_CS0 = 0x00;
+    pub const DSCP_CS1 = 0x20;
+    pub const DSCP_AF11 = 0x28;
+    pub const DSCP_AF12 = 0x30;
+    pub const DSCP_AF13 = 0x38;
+    pub const DSCP_CS2 = 0x40;
+    pub const DSCP_AF21 = 0x48;
+    pub const DSCP_AF22 = 0x50;
+    pub const DSCP_AF23 = 0x58;
+    pub const DSCP_CS3 = 0x60;
+    pub const DSCP_AF31 = 0x68;
+    pub const DSCP_AF32 = 0x70;
+    pub const DSCP_AF33 = 0x78;
+    pub const DSCP_CS4 = 0x80;
+    pub const DSCP_AF41 = 0x88;
+    pub const DSCP_AF42 = 0x90;
+    pub const DSCP_AF43 = 0x98;
+    pub const DSCP_CS5 = 0xa0;
+    pub const DSCP_VA = 0xb0;
+    pub const DSCP_EF = 0xb8;
+    pub const DSCP_CS6 = 0xc0;
+    pub const DSCP_CS7 = 0xe0;
+    pub const ECN_NOTECT = 0x00;
+    pub const ECN_ECT1 = 0x01;
+    pub const ECN_ECT0 = 0x02;
+    pub const ECN_CE = 0x03;
+    pub const ECN_MASK = 0x03;
+};
diff --git a/lib/std/c/haiku.zig b/lib/std/c/haiku.zig
index bfac0cfa559b987a31f60d623e38b0ebe2a79ba1..e62e38716427b7757672bb9b903771216f1b754c 100644
--- a/lib/std/c/haiku.zig
+++ b/lib/std/c/haiku.zig
@@ -553,3 +553,50 @@ pub const DirEnt = extern struct {
         return @ptrCast(&dirent.name);
     }
 };
+
+// https://github.com/haiku/haiku/blob/2aab5f5f14aeb3f34c3a3d9a9064cc3c0d914bea/headers/posix/netinet/in.h#L122
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 5;
+    pub const RECVRETOPTS = 6;
+    pub const RECVDSTADDR = 7;
+    pub const RETOPTS = 8;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_TTL = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const ADD_MEMBERSHIP = 12;
+    pub const DROP_MEMBERSHIP = 13;
+    pub const BLOCK_SOURCE = 14;
+    pub const UNBLOCK_SOURCE = 15;
+    pub const ADD_SOURCE_MEMBERSHIP = 16;
+    pub const DROP_SOURCE_MEMBERSHIP = 17;
+    pub const DONTFRAG = 38;
+};
+
+// https://github.com/haiku/haiku/blob/2aab5f5f14aeb3f34c3a3d9a9064cc3c0d914bea/headers/posix/netinet/in.h#L150
+pub const IPV6 = struct {
+    pub const MULTICAST_IF = 24;
+    pub const MULTICAST_HOPS = 25;
+    pub const MULTICAST_LOOP = 26;
+    pub const UNICAST_HOPS = 27;
+    pub const JOIN_GROUP = 28;
+    pub const LEAVE_GROUP = 29;
+    pub const V6ONLY = 30;
+    pub const PKTINFO = 31;
+    pub const RECVPKTINFO = 32;
+    pub const HOPLIMIT = 33;
+    pub const RECVHOPLIMIT = 34;
+    pub const HOPOPTS = 35;
+    pub const DSTOPTS = 36;
+    pub const RTHDR = 37;
+};
+
+// https://github.com/haiku/haiku/blob/2aab5f5f14aeb3f34c3a3d9a9064cc3c0d914bea/headers/posix/netinet/ip.h#L36
+pub const IPTOS = struct {
+    pub const RELIABILITY = 0x04;
+    pub const THROUGHPUT = 0x08;
+    pub const LOWDELAY = 0x10;
+};
diff --git a/lib/std/c/netbsd.zig b/lib/std/c/netbsd.zig
index a4b3218ad93b17c847e676b7a36f4cc5d361dce4..4841914600ebebe081c1198959ce47b5bd5e7e0c 100644
--- a/lib/std/c/netbsd.zig
+++ b/lib/std/c/netbsd.zig
@@ -201,3 +201,155 @@ pub const E = enum(u16) {
 
     _,
 };
+
+// https://github.com/NetBSD/src/blob/80bf25a5691072d4755e84567ccbdf0729370dea/sys/netinet/in.h#L276
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 5;
+    pub const RECVRETOPTS = 6;
+    pub const RECVDSTADDR = 7;
+    pub const RETOPTS = 8;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_TTL = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const ADD_MEMBERSHIP = 12;
+    pub const DROP_MEMBERSHIP = 13;
+    pub const PORTALGO = 18;
+    pub const PORTRANGE = 19;
+    pub const RECVIF = 20;
+    pub const ERRORMTU = 21;
+    pub const IPSEC_POLICY = 22;
+    pub const RECVTTL = 23;
+    pub const MINTTL = 24;
+    pub const PKTINFO = 25;
+    pub const RECVPKTINFO = 26;
+    pub const BINDANY = 27;
+    pub const SENDSRCADDR = RECVDSTADDR;
+    pub const DEFAULT_MULTICAST_TTL = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MAX_MEMBERSHIPS = 20;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/NetBSD/src/blob/80bf25a5691072d4755e84567ccbdf0729370dea/sys/netinet6/in6.h#L370
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 4;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_HOPS = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const JOIN_GROUP = 12;
+    pub const LEAVE_GROUP = 13;
+    pub const PORTRANGE = 14;
+    pub const PORTALGO = 17;
+    pub const @"2292PKTINFO" = 19;
+    pub const @"2292HOPLIMIT" = 20;
+    pub const @"2292NEXTHOP" = 21;
+    pub const @"2292HOPOPTS" = 22;
+    pub const @"2292DSTOPTS" = 23;
+    pub const @"2292RTHDR" = 24;
+    pub const @"2292PKTOPTIONS" = 25;
+    pub const CHECKSUM = 26;
+    pub const V6ONLY = 27;
+    pub const IPSEC_POLICY = 28;
+    pub const FAITH = 29;
+    pub const RTHDRDSTOPTS = 35;
+    pub const RECVPKTINFO = 36;
+    pub const RECVHOPLIMIT = 37;
+    pub const RECVRTHDR = 38;
+    pub const RECVHOPOPTS = 39;
+    pub const RECVDSTOPTS = 40;
+    pub const RECVRTHDRDSTOPTS = 41;
+    pub const USE_MIN_MTU = 42;
+    pub const RECVPATHMTU = 43;
+    pub const PATHMTU = 44;
+    pub const PKTINFO = 46;
+    pub const HOPLIMIT = 47;
+    pub const NEXTHOP = 48;
+    pub const HOPOPTS = 49;
+    pub const DSTOPTS = 50;
+    pub const RTHDR = 51;
+    pub const RECVTCLASS = 57;
+    pub const OTCLASS = 58;
+    pub const TCLASS = 61;
+    pub const DONTFRAG = 62;
+    pub const PREFER_TEMPADDR = 63;
+    pub const BINDANY = 64;
+    pub const RTHDR_LOOSE = 0;
+    pub const RTHDR_STRICT = 1;
+    pub const RTHDR_TYPE_0 = 0;
+    pub const DEFAULT_MULTICAST_HOPS = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/NetBSD/src/blob/80bf25a5691072d4755e84567ccbdf0729370dea/sys/netinet/ip.h#L140
+pub const IPTOS = struct {
+    pub const DSCP_CS0 = 0x00;
+    pub const DSCP_CS1 = 0x20;
+    pub const DSCP_AF11 = 0x28;
+    pub const DSCP_AF12 = 0x30;
+    pub const DSCP_AF13 = 0x38;
+    pub const DSCP_CS2 = 0x40;
+    pub const DSCP_AF21 = 0x48;
+    pub const DSCP_AF22 = 0x50;
+    pub const DSCP_AF23 = 0x58;
+    pub const DSCP_CS3 = 0x60;
+    pub const DSCP_AF31 = 0x68;
+    pub const DSCP_AF32 = 0x70;
+    pub const DSCP_AF33 = 0x78;
+    pub const DSCP_CS4 = 0x80;
+    pub const DSCP_AF41 = 0x88;
+    pub const DSCP_AF42 = 0x90;
+    pub const DSCP_AF43 = 0x98;
+    pub const DSCP_CS5 = 0xa0;
+    pub const DSCP_EF = 0xb8;
+    pub const DSCP_CS6 = 0xc0;
+    pub const DSCP_CS7 = 0xe0;
+    pub const CLASS_CS0 = 0x00;
+    pub const CLASS_CS1 = 0x20;
+    pub const CLASS_CS2 = 0x40;
+    pub const CLASS_CS3 = 0x60;
+    pub const CLASS_CS4 = 0x80;
+    pub const CLASS_CS5 = 0xa0;
+    pub const CLASS_CS6 = 0xc0;
+    pub const CLASS_CS7 = 0xe0;
+    pub const CLASS_DEFAULT = CLASS_CS0;
+    pub const CLASS_MASK = 0xe0;
+    pub fn CLASS(t: anytype) @TypeOf(t) {
+        return t & CLASS_MASK;
+    }
+    pub const DSCP_MASK = 0xfc;
+    pub fn DSCP(t: anytype) @TypeOf(t) {
+        return t & DSCP_MASK;
+    }
+    pub const ECN_NOTECT = 0x00;
+    pub const ECN_ECT1 = 0x01;
+    pub const ECN_ECT0 = 0x02;
+    pub const ECN_CE = 0x03;
+    pub const ECN_MASK = 0x03;
+    pub fn ECN(t: anytype) @TypeOf(t) {
+        return t & ECN_MASK;
+    }
+    pub const ECN_NOT_ECT = 0x00;
+    pub const LOWDELAY = 0x10;
+    pub const THROUGHPUT = 0x08;
+    pub const RELIABILITY = 0x04;
+    pub const MINCOST = 0x02;
+    pub const CE = 0x01;
+    pub const ECT = 0x02;
+    pub const PREC_NETCONTROL = 0xe0;
+    pub const PREC_INTERNETCONTROL = 0xc0;
+    pub const PREC_CRITIC_ECP = 0xa0;
+    pub const PREC_FLASHOVERRIDE = 0x80;
+    pub const PREC_FLASH = 0x60;
+    pub const PREC_IMMEDIATE = 0x40;
+    pub const PREC_PRIORITY = 0x20;
+    pub const PREC_ROUTINE = 0x00;
+};
diff --git a/lib/std/c/openbsd.zig b/lib/std/c/openbsd.zig
index 242d988de3d3f8052ed68be0af7ed6aa729f316b..772083bb43db1fd14ec2d45b05a30cf8af73d572 100644
--- a/lib/std/c/openbsd.zig
+++ b/lib/std/c/openbsd.zig
@@ -351,3 +351,139 @@ pub const PTHREAD_STACK_MIN = switch (builtin.cpu.arch) {
     .mips64 => 1 << 14,
     else => 1 << 12,
 };
+
+// https://github.com/openbsd/src/blob/718a31b40d39fc6064de6355eb144e74633133fc/sys/netinet/in.h#L283
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 5;
+    pub const RECVRETOPTS = 6;
+    pub const RECVDSTADDR = 7;
+    pub const RETOPTS = 8;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_TTL = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const ADD_MEMBERSHIP = 12;
+    pub const DROP_MEMBERSHIP = 13;
+    pub const PORTRANGE = 19;
+    pub const AUTH_LEVEL = 20;
+    pub const ESP_TRANS_LEVEL = 21;
+    pub const ESP_NETWORK_LEVEL = 22;
+    pub const IPSEC_LOCAL_ID = 23;
+    pub const IPSEC_REMOTE_ID = 24;
+    pub const IPSEC_LOCAL_CRED = 25;
+    pub const IPSEC_REMOTE_CRED = 26;
+    pub const IPSEC_LOCAL_AUTH = 27;
+    pub const IPSEC_REMOTE_AUTH = 28;
+    pub const IPCOMP_LEVEL = 29;
+    pub const RECVIF = 30;
+    pub const RECVTTL = 31;
+    pub const MINTTL = 32;
+    pub const RECVDSTPORT = 33;
+    pub const PIPEX = 34;
+    pub const RECVRTABLE = 35;
+    pub const IPSECFLOWINFO = 36;
+    pub const IPDEFTTL = 37;
+    pub const SENDSRCADDR = RECVDSTADDR;
+    pub const RTABLE = 0x1021;
+    pub const DEFAULT_MULTICAST_TTL = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const MIN_MEMBERSHIPS = 15;
+    pub const MAX_MEMBERSHIPS = 4095;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/openbsd/src/blob/718a31b40d39fc6064de6355eb144e74633133fc/sys/netinet6/in6.h#L284
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 4;
+    pub const MULTICAST_IF = 9;
+    pub const MULTICAST_HOPS = 10;
+    pub const MULTICAST_LOOP = 11;
+    pub const JOIN_GROUP = 12;
+    pub const LEAVE_GROUP = 13;
+    pub const PORTRANGE = 14;
+    pub const CHECKSUM = 26;
+    pub const V6ONLY = 27;
+    pub const RTHDRDSTOPTS = 35;
+    pub const RECVPKTINFO = 36;
+    pub const RECVHOPLIMIT = 37;
+    pub const RECVRTHDR = 38;
+    pub const RECVHOPOPTS = 39;
+    pub const RECVDSTOPTS = 40;
+    pub const USE_MIN_MTU = 42;
+    pub const RECVPATHMTU = 43;
+    pub const PATHMTU = 44;
+    pub const PKTINFO = 46;
+    pub const HOPLIMIT = 47;
+    pub const NEXTHOP = 48;
+    pub const HOPOPTS = 49;
+    pub const DSTOPTS = 50;
+    pub const RTHDR = 51;
+    pub const AUTH_LEVEL = 53;
+    pub const ESP_TRANS_LEVEL = 54;
+    pub const ESP_NETWORK_LEVEL = 55;
+    pub const RECVTCLASS = 57;
+    pub const AUTOFLOWLABEL = 59;
+    pub const IPCOMP_LEVEL = 60;
+    pub const TCLASS = 61;
+    pub const DONTFRAG = 62;
+    pub const PIPEX = 63;
+    pub const RECVDSTPORT = 64;
+    pub const MINHOPCOUNT = 65;
+    pub const RTABLE = 0x1021;
+    pub const RTHDR_LOOSE = 0;
+    pub const RTHDR_TYPE_0 = 0;
+    pub const DEFAULT_MULTICAST_HOPS = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+    pub const PORTRANGE_DEFAULT = 0;
+    pub const PORTRANGE_HIGH = 1;
+    pub const PORTRANGE_LOW = 2;
+};
+
+// https://github.com/openbsd/src/blob/718a31b40d39fc6064de6355eb144e74633133fc/sys/netinet/ip.h#L73
+pub const IPTOS = struct {
+    pub const LOWDELAY = 0x10;
+    pub const THROUGHPUT = 0x08;
+    pub const RELIABILITY = 0x04;
+    pub const CE = 0x01;
+    pub const ECT = 0x02;
+    pub const PREC_NETCONTROL = 0xe0;
+    pub const PREC_INTERNETCONTROL = 0xc0;
+    pub const PREC_CRITIC_ECP = 0xa0;
+    pub const PREC_FLASHOVERRIDE = 0x80;
+    pub const PREC_FLASH = 0x60;
+    pub const PREC_IMMEDIATE = 0x40;
+    pub const PREC_PRIORITY = 0x20;
+    pub const PREC_ROUTINE = 0x00;
+    pub const DSCP_CS0 = 0x00;
+    pub const DSCP_LE = 0x04;
+    pub const DSCP_CS1 = 0x20;
+    pub const DSCP_AF11 = 0x28;
+    pub const DSCP_AF12 = 0x30;
+    pub const DSCP_AF13 = 0x38;
+    pub const DSCP_CS2 = 0x40;
+    pub const DSCP_AF21 = 0x48;
+    pub const DSCP_AF22 = 0x50;
+    pub const DSCP_AF23 = 0x58;
+    pub const DSCP_CS3 = 0x60;
+    pub const DSCP_AF31 = 0x68;
+    pub const DSCP_AF32 = 0x70;
+    pub const DSCP_AF33 = 0x78;
+    pub const DSCP_CS4 = 0x80;
+    pub const DSCP_AF41 = 0x88;
+    pub const DSCP_AF42 = 0x90;
+    pub const DSCP_AF43 = 0x98;
+    pub const DSCP_CS5 = 0xa0;
+    pub const DSCP_EF = 0xb8;
+    pub const DSCP_CS6 = 0xc0;
+    pub const DSCP_CS7 = 0xe0;
+    pub const ECN_NOTECT = 0x00;
+    pub const ECN_ECT1 = 0x01;
+    pub const ECN_ECT0 = 0x02;
+    pub const ECN_CE = 0x03;
+    pub const ECN_MASK = 0x03;
+};
diff --git a/lib/std/c/serenity.zig b/lib/std/c/serenity.zig
index 608881f03554109509018ef0f63a5418b26f042b..b69eb602991c5d871b2c9eb05e4ca30548c059fd 100644
--- a/lib/std/c/serenity.zig
+++ b/lib/std/c/serenity.zig
@@ -71,3 +71,43 @@ pub extern "c" fn serenity_open(path: [*]const u8, path_length: usize, options:
 
 pub extern "c" fn getkeymap(name_buffer: [*]u8, name_buffer_size: usize, map: [*]u32, shift_map: [*]u32, alt_map: [*]u32, altgr_map: [*]u32, shift_altgr_map: [*]u32) c_int;
 pub extern "c" fn setkeymap(name: [*]const u8, map: [*]const u32, shift_map: [*]const u32, alt_map: [*]const u32, altgr_map: [*]const u32, shift_altgr_map: [*]const u32) c_int;
+
+// https://github.com/SerenityOS/serenity/blob/5bd8af99be0bc4b2e14f361fd7d7590e6bcfa4d6/Kernel/API/POSIX/netinet/in.h#L29
+pub const IP = struct {
+    pub const TOS = 1;
+    pub const TTL = 2;
+    pub const MULTICAST_LOOP = 3;
+    pub const ADD_MEMBERSHIP = 4;
+    pub const DROP_MEMBERSHIP = 5;
+    pub const MULTICAST_IF = 6;
+    pub const MULTICAST_TTL = 7;
+    pub const BLOCK_SOURCE = 8;
+    pub const ADD_SOURCE_MEMBERSHIP = 7;
+    pub const DROP_SOURCE_MEMBERSHIP = 8;
+    pub const UNBLOCK_SOURCE = 9;
+    pub const OPTIONS = 10;
+};
+
+//  https://github.com/SerenityOS/serenity/blob/5bd8af99be0bc4b2e14f361fd7d7590e6bcfa4d6/Kernel/API/POSIX/netinet/in.h#L81
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 1;
+    pub const MULTICAST_HOPS = 2;
+    pub const MULTICAST_LOOP = 3;
+    pub const MULTICAST_IF = 4;
+    pub const ADD_MEMBERSHIP = 5;
+    pub const DROP_MEMBERSHIP = 6;
+    pub const V6ONLY = 9;
+    pub const JOIN_GROUP = 5;
+    pub const LEAVE_GROUP = 6;
+    pub const RECVPKTINFO = 10;
+    pub const PKTINFO = 11;
+    pub const RECVHOPLIMIT = 12;
+    pub const HOPLIMIT = 13;
+};
+
+// https://github.com/SerenityOS/serenity/blob/5bd8af99be0bc4b2e14f361fd7d7590e6bcfa4d6/Kernel/API/POSIX/netinet/in.h#L40
+pub const IPTOS = struct {
+    pub const LOWDELAY = 16;
+    pub const THROUGHPUT = 8;
+    pub const RELIABILITY = 4;
+};
diff --git a/lib/std/c/solaris.zig b/lib/std/c/solaris.zig
index 9736309d065d23f69dec7e0e888abecf11467131..39df093c862aa0baa612e7dc3adae41032f0009c 100644
--- a/lib/std/c/solaris.zig
+++ b/lib/std/c/solaris.zig
@@ -363,3 +363,118 @@ pub fn IOW(io_type: u8, nr: u8, comptime IOT: type) i32 {
 pub fn IOWR(io_type: u8, nr: u8, comptime IOT: type) i32 {
     return ioImpl(.read_write, io_type, nr, IOT);
 }
+
+// https://github.com/illumos/illumos-gate/blob/608eb926e14f4ba4736b2d59e891335f1cba9e1e/usr/src/uts/common/netinet/in.h#L1141
+// (old OpenSolaris is very similar, it's just missing a few more-modern ones, and probably modern Solaris has those)
+pub const IP = struct {
+    pub const OPTIONS = 1;
+    pub const HDRINCL = 2;
+    pub const TOS = 3;
+    pub const TTL = 4;
+    pub const RECVOPTS = 0x5;
+    pub const RECVRETOPTS = 0x6;
+    pub const RECVDSTADDR = 0x7;
+    pub const RETOPTS = 0x8;
+    pub const RECVIF = 0x9;
+    pub const RECVSLLA = 0xa;
+    pub const RECVTTL = 0xb;
+    pub const RECVTOS = 0xc;
+    pub const MULTICAST_IF = 0x10;
+    pub const MULTICAST_TTL = 0x11;
+    pub const MULTICAST_LOOP = 0x12;
+    pub const ADD_MEMBERSHIP = 0x13;
+    pub const DROP_MEMBERSHIP = 0x14;
+    pub const BLOCK_SOURCE = 0x15;
+    pub const UNBLOCK_SOURCE = 0x16;
+    pub const ADD_SOURCE_MEMBERSHIP = 0x17;
+    pub const DROP_SOURCE_MEMBERSHIP = 0x18;
+    pub const NEXTHOP = 0x19;
+    pub const PKTINFO = 0x1a;
+    pub const RECVPKTINFO = 0x1a;
+    pub const DONTFRAG = 0x1b;
+    pub const MINTTL = 0x1c;
+    pub const SEC_OPT = 0x22;
+    pub const BOUND_IF = 0x41;
+    pub const UNSPEC_SRC = 0x42;
+    pub const BROADCAST_TTL = 0x43;
+    pub const DHCPINIT_IF = 0x45;
+    pub const REUSEADDR = 0x104;
+    pub const DONTROUTE = 0x105;
+    pub const BROADCAST = 0x106;
+    // Same namespace, but these are arguments rather than option names
+    pub const DEFAULT_MULTICAST_TTL = 1;
+    pub const DEFAULT_MULTICAST_LOOP = 1;
+};
+
+// https://github.com/illumos/illumos-gate/blob/608eb926e14f4ba4736b2d59e891335f1cba9e1e/usr/src/uts/common/netinet/in.h#L1192
+// (old OpenSolaris is very similar, it's just missing a few more-modern ones, and probably modern Solaris has those)
+pub const IPV6 = struct {
+    pub const UNICAST_HOPS = 0x5;
+    pub const MULTICAST_IF = 0x6;
+    pub const MULTICAST_HOPS = 0x7;
+    pub const MULTICAST_LOOP = 0x8;
+    pub const JOIN_GROUP = 0x9;
+    pub const LEAVE_GROUP = 0xa;
+    pub const ADD_MEMBERSHIP = 0x9;
+    pub const DROP_MEMBERSHIP = 0xa;
+    pub const PKTINFO = 0xb;
+    pub const HOPLIMIT = 0xc;
+    pub const NEXTHOP = 0xd;
+    pub const HOPOPTS = 0xe;
+    pub const DSTOPTS = 0xf;
+    pub const RTHDR = 0x10;
+    pub const RTHDRDSTOPTS = 0x11;
+    pub const RECVPKTINFO = 0x12;
+    pub const RECVHOPLIMIT = 0x13;
+    pub const RECVHOPOPTS = 0x14;
+    pub const OLD_RECVDSTOPTS = 0x15;
+    pub const RECVRTHDR = 0x16;
+    pub const RECVRTHDRDSTOPTS = 0x17;
+    pub const CHECKSUM = 0x18;
+    pub const RECVTCLASS = 0x19;
+    pub const USE_MIN_MTU = 0x20;
+    pub const DONTFRAG = 0x21;
+    pub const SEC_OPT = 0x22;
+    pub const SRC_PREFERENCES = 0x23;
+    pub const RECVPATHMTU = 0x24;
+    pub const PATHMTU = 0x25;
+    pub const TCLASS = 0x26;
+    pub const V6ONLY = 0x27;
+    pub const RECVDSTOPTS = 0x28;
+    pub const MINHOPCOUNT = 0x2f;
+    pub const BOUND_IF = 0x41;
+    pub const UNSPEC_SRC = 0x42;
+    // Same namespace, but these are arguments rather than option names
+    pub const RTHDR_TYPE_0 = 0;
+    pub const PREFER_SRC_HOME = 0x01;
+    pub const PREFER_SRC_COA = 0x02;
+    pub const PREFER_SRC_PUBLIC = 0x04;
+    pub const PREFER_SRC_TMP = 0x08;
+    pub const PREFER_SRC_NONCGA = 0x10;
+    pub const PREFER_SRC_CGA = 0x20;
+    pub const PREFER_SRC_MIPMASK = PREFER_SRC_HOME | PREFER_SRC_COA;
+    pub const PREFER_SRC_MIPDEFAULT = PREFER_SRC_HOME;
+    pub const PREFER_SRC_TMPMASK = PREFER_SRC_PUBLIC | PREFER_SRC_TMP;
+    pub const PREFER_SRC_TMPDEFAULT = PREFER_SRC_PUBLIC;
+    pub const PREFER_SRC_CGAMASK = PREFER_SRC_NONCGA | PREFER_SRC_CGA;
+    pub const PREFER_SRC_CGADEFAULT = PREFER_SRC_NONCGA;
+    pub const PREFER_SRC_MASK = PREFER_SRC_MIPMASK | PREFER_SRC_TMPMASK | PREFER_SRC_CGAMASK;
+    pub const PREFER_SRC_DEFAULT = PREFER_SRC_MIPDEFAULT | PREFER_SRC_TMPDEFAULT | PREFER_SRC_CGADEFAULT;
+};
+
+// https://github.com/illumos/illumos-gate/blob/608eb926e14f4ba4736b2d59e891335f1cba9e1e/usr/src/uts/common/netinet/ip.h#L64
+pub const IPTOS = struct {
+    pub const LOWDELAY = 0x10;
+    pub const THROUGHPUT = 0x08;
+    pub const RELIABILITY = 0x04;
+    pub const ECT = 0x02;
+    pub const CE = 0x01;
+    pub const PREC_NETCONTROL = 0xe0;
+    pub const PREC_INTERNETCONTROL = 0xc0;
+    pub const PREC_CRITIC_ECP = 0xa0;
+    pub const PREC_FLASHOVERRIDE = 0x80;
+    pub const PREC_FLASH = 0x60;
+    pub const PREC_IMMEDIATE = 0x40;
+    pub const PREC_PRIORITY = 0x20;
+    pub const PREC_ROUTINE = 0x00;
+};
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index e6fcd08f19e42fd42e3d7b43eb5856834bc1da0c..e1f6a76ad7215f34a63a95cc467c6373bbf2d3d4 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -4524,6 +4524,33 @@ pub const IPV6 = struct {
     pub const FREEBIND = 78;
 };
 
+// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/ip.h?id=64e844505bc08cde3f346f193cbbbab0096fef54#n24
+pub const IPTOS = struct {
+    pub const TOS_MASK = 0x1e;
+    pub fn TOS(t: anytype) @TypeOf(t) {
+        return t & TOS_MASK;
+    }
+
+    pub const MINCOST = 0x02;
+    pub const RELIABILITY = 0x04;
+    pub const THROUGHPUT = 0x08;
+    pub const LOWDELAY = 0x10;
+
+    pub const PREC_MASK = 0xe0;
+    pub fn PREC(t: anytype) @TypeOf(t) {
+        return t & PREC_MASK;
+    }
+
+    pub const PREC_ROUTINE = 0x00;
+    pub const PREC_PRIORITY = 0x20;
+    pub const PREC_IMMEDIATE = 0x40;
+    pub const PREC_FLASH = 0x60;
+    pub const PREC_FLASHOVERRIDE = 0x80;
+    pub const PREC_CRITIC_ECP = 0xa0;
+    pub const PREC_INTERNETCONTROL = 0xc0;
+    pub const PREC_NETCONTROL = 0xe0;
+};
+
 // https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/socket.h?id=b1e904999542ad6764eafa54545f1c55776006d1#n43
 pub const linger = extern struct {
     onoff: i32, // non-zero to linger on close
diff --git a/lib/std/posix.zig b/lib/std/posix.zig
index 283bc9276c8407bd448d9db3e1276ca9951beae6..2890c14360701b188adff6fdc8545a168cd1a1de 100644
--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -75,7 +75,10 @@ pub const HOST_NAME_MAX = system.HOST_NAME_MAX;
 pub const HW = system.HW;
 pub const IFNAMESIZE = system.IFNAMESIZE;
 pub const IOV_MAX = system.IOV_MAX;
+pub const IP = system.IP;
+pub const IPV6 = system.IPV6;
 pub const IPPROTO = system.IPPROTO;
+pub const IPTOS = system.IPTOS;
 pub const KERN = system.KERN;
 pub const Kevent = system.Kevent;
 pub const MADV = system.MADV;