diff --git a/libc-test/semver/android.txt b/libc-test/semver/android.txt
index e765b15d5c2e..083e25baff3e 100644
--- a/libc-test/semver/android.txt
+++ b/libc-test/semver/android.txt
@@ -3609,6 +3609,8 @@ gmtime
 gmtime_r
 grantpt
 group
+group_req
+group_source_req
 hostent
 id_t
 idtype_t
diff --git a/libc-test/semver/apple.txt b/libc-test/semver/apple.txt
index a86287d1cb47..c5c88bd6decb 100644
--- a/libc-test/semver/apple.txt
+++ b/libc-test/semver/apple.txt
@@ -909,6 +909,12 @@ MAXPHASE
 MAXSEC
 MAXTC
 MAXTHREADNAMESIZE
+MCAST_BLOCK_SOURCE
+MCAST_JOIN_GROUP
+MCAST_JOIN_SOURCE_GROUP
+MCAST_LEAVE_GROUP
+MCAST_LEAVE_SOURCE_GROUP
+MCAST_UNBLOCK_SOURCE
 MCL_CURRENT
 MCL_FUTURE
 MDMBUF
@@ -2018,6 +2024,8 @@ getxattr
 glob
 glob_t
 globfree
+group_req
+group_source_req
 host_cpu_load_info
 host_cpu_load_info_data_t
 host_cpu_load_info_t
diff --git a/libc-test/semver/freebsd.txt b/libc-test/semver/freebsd.txt
index a26355468d60..1b2e914443de 100644
--- a/libc-test/semver/freebsd.txt
+++ b/libc-test/semver/freebsd.txt
@@ -855,6 +855,12 @@ MAXFREQ
 MAXPHASE
 MAXSEC
 MAXTC
+MCAST_BLOCK_SOURCE
+MCAST_JOIN_GROUP
+MCAST_JOIN_SOURCE_GROUP
+MCAST_LEAVE_GROUP
+MCAST_LEAVE_SOURCE_GROUP
+MCAST_UNBLOCK_SOURCE
 MCL_CURRENT
 MCL_FUTURE
 MDMBUF
@@ -2065,6 +2071,8 @@ getutxuser
 glob
 glob_t
 globfree
+group_req
+group_source_req
 hexdump
 humanize_number
 icmp6_ifstat
diff --git a/libc-test/semver/l4re.txt b/libc-test/semver/l4re.txt
index 04fdedd37ae8..e4a8a79a28a1 100644
--- a/libc-test/semver/l4re.txt
+++ b/libc-test/semver/l4re.txt
@@ -2201,6 +2201,8 @@ gid_t
 gmtime
 gmtime_r
 group
+group_req
+group_source_req
 hostent
 hstrerror
 iconv
diff --git a/libc-test/semver/linux.txt b/libc-test/semver/linux.txt
index 83d3f080e515..3be951116278 100644
--- a/libc-test/semver/linux.txt
+++ b/libc-test/semver/linux.txt
@@ -4179,6 +4179,8 @@ getspnam
 getspnam_r
 gettid
 getxattr
+group_req
+group_source_req
 hasmntopt
 hwtstamp_config
 iconv
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index aa9d275c676d..aad9a1161d88 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -1348,6 +1348,20 @@ s! {
         __ss_pad2: Padding<[u8; 112]>,
     }
 
+    // netinet/in.h: RFC 3678 multicast group membership requests.
+    #[repr(packed(4))]
+    pub struct group_req {
+        pub gr_interface: u32,
+        pub gr_group: crate::sockaddr_storage,
+    }
+
+    #[repr(packed(4))]
+    pub struct group_source_req {
+        pub gsr_interface: u32,
+        pub gsr_group: crate::sockaddr_storage,
+        pub gsr_source: crate::sockaddr_storage,
+    }
+
     pub struct utmpx {
         pub ut_user: [c_char; _UTX_USERSIZE],
         pub ut_id: [c_char; _UTX_IDSIZE],
@@ -2611,6 +2625,14 @@ pub const IPPROTO_MAX: c_int = 256;
 /// last return value of *_input(), meaning "all job for this pkt is done".
 pub const IPPROTO_DONE: c_int = 257;
 
+// RFC 3678 protocol-independent multicast
+pub const MCAST_JOIN_GROUP: c_int = 80;
+pub const MCAST_LEAVE_GROUP: c_int = 81;
+pub const MCAST_JOIN_SOURCE_GROUP: c_int = 82;
+pub const MCAST_LEAVE_SOURCE_GROUP: c_int = 83;
+pub const MCAST_BLOCK_SOURCE: c_int = 84;
+pub const MCAST_UNBLOCK_SOURCE: c_int = 85;
+
 pub const AF_UNSPEC: c_int = 0;
 pub const AF_LOCAL: c_int = 1;
 pub const AF_UNIX: c_int = AF_LOCAL;
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index 06b68752459a..2330e094313a 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -209,12 +209,24 @@ s! {
         pub ip6: *mut crate::in6_addr,
     }
 
+    // netinet/in.h: RFC 3678 multicast group membership requests
     pub struct ip_mreq_source {
         pub imr_multiaddr: crate::in_addr,
         pub imr_sourceaddr: crate::in_addr,
         pub imr_interface: crate::in_addr,
     }
 
+    pub struct group_req {
+        pub gr_interface: u32,
+        pub gr_group: crate::sockaddr_storage,
+    }
+
+    pub struct group_source_req {
+        pub gsr_interface: u32,
+        pub gsr_group: crate::sockaddr_storage,
+        pub gsr_source: crate::sockaddr_storage,
+    }
+
     pub struct statvfs {
         pub f_bavail: crate::fsblkcnt_t,
         pub f_bfree: crate::fsblkcnt_t,
@@ -3075,6 +3087,14 @@ pub const IPPROTO_DIVERT: c_int = 258;
 /// SeND pseudo-protocol
 pub const IPPROTO_SEND: c_int = 259;
 
+// RFC 3678 protocol-independent multicast
+pub const MCAST_JOIN_GROUP: c_int = 80;
+pub const MCAST_LEAVE_GROUP: c_int = 81;
+pub const MCAST_JOIN_SOURCE_GROUP: c_int = 82;
+pub const MCAST_LEAVE_SOURCE_GROUP: c_int = 83;
+pub const MCAST_BLOCK_SOURCE: c_int = 84;
+pub const MCAST_UNBLOCK_SOURCE: c_int = 85;
+
 // sys/netinet/TCP.h
 pub const TCP_MD5SIG: c_int = 16;
 pub const TCP_INFO: c_int = 32;
diff --git a/src/unix/linux_like/mod.rs b/src/unix/linux_like/mod.rs
index 1e53ecf682d2..120f06ada3f6 100644
--- a/src/unix/linux_like/mod.rs
+++ b/src/unix/linux_like/mod.rs
@@ -36,12 +36,24 @@ s! {
         pub imr_ifindex: c_int,
     }
 
+    // netinet/in.h: RFC 3678 multicast group membership requests
     pub struct ip_mreq_source {
         pub imr_multiaddr: in_addr,
         pub imr_interface: in_addr,
         pub imr_sourceaddr: in_addr,
     }
 
+    pub struct group_req {
+        pub gr_interface: u32,
+        pub gr_group: crate::sockaddr_storage,
+    }
+
+    pub struct group_source_req {
+        pub gsr_interface: u32,
+        pub gsr_group: crate::sockaddr_storage,
+        pub gsr_source: crate::sockaddr_storage,
+    }
+
     pub struct sockaddr {
         pub sa_family: sa_family_t,
         pub sa_data: [c_char; 14],