107 #include <net/scm.h>
117 #include "scm.h"
139 static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_get_secdata()  argument
141 	UNIXCB(skb).secid = scm->secid;  in unix_get_secdata()
144 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_set_secdata()  argument
146 	scm->secid = UNIXCB(skb).secid;  in unix_set_secdata()
149 static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)  in unix_secdata_eq()  argument
151 	return (scm->secid == UNIXCB(skb).secid);  in unix_secdata_eq()
154 static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_get_secdata()  argument
157 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)  in unix_set_secdata()  argument
160 static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)  in unix_secdata_eq()  argument
1546 static void unix_peek_fds(struct scm_cookie *scm, struct sk_buff *skb)  in unix_peek_fds()  argument
1548 	scm->fp = scm_fp_dup(UNIXCB(skb).fp);  in unix_peek_fds()
1593 static int unix_scm_to_skb(struct scm_cookie *scm, struct sk_buff *skb, bool send_fds)  in unix_scm_to_skb()  argument
1597 	UNIXCB(skb).pid  = get_pid(scm->pid);  in unix_scm_to_skb()
1598 	UNIXCB(skb).uid = scm->creds.uid;  in unix_scm_to_skb()
1599 	UNIXCB(skb).gid = scm->creds.gid;  in unix_scm_to_skb()
1601 	unix_get_secdata(scm, skb);  in unix_scm_to_skb()
1602 	if (scm->fp && send_fds)  in unix_scm_to_skb()
1603 		err = unix_attach_fds(scm, skb);  in unix_scm_to_skb()
1633 static int maybe_init_creds(struct scm_cookie *scm,  in maybe_init_creds()  argument
1640 	err = scm_send(socket, &msg, scm, false);  in maybe_init_creds()
1645 		scm->pid = get_pid(task_tgid(current));  in maybe_init_creds()
1646 		current_uid_gid(&scm->creds.uid, &scm->creds.gid);  in maybe_init_creds()
1652 			    struct scm_cookie *scm)  in unix_skb_scm_eq()  argument
1656 	return u->pid == scm->pid &&  in unix_skb_scm_eq()
1657 	       uid_eq(u->uid, scm->creds.uid) &&  in unix_skb_scm_eq()
1658 	       gid_eq(u->gid, scm->creds.gid) &&  in unix_skb_scm_eq()
1659 	       unix_secdata_eq(scm, skb);  in unix_skb_scm_eq()
1697 	struct scm_cookie scm;  in unix_dgram_sendmsg()  local
1702 	err = scm_send(sock, msg, &scm, false);  in unix_dgram_sendmsg()
1746 	err = unix_scm_to_skb(&scm, skb, true);  in unix_dgram_sendmsg()
1871 	scm_destroy(&scm);  in unix_dgram_sendmsg()
1883 	scm_destroy(&scm);  in unix_dgram_sendmsg()
1900 	struct scm_cookie scm;  in unix_stream_sendmsg()  local
1905 	err = scm_send(sock, msg, &scm, false);  in unix_stream_sendmsg()
1946 		err = unix_scm_to_skb(&scm, skb, !fds_sent);  in unix_stream_sendmsg()
1976 	scm_destroy(&scm);  in unix_stream_sendmsg()
1988 	scm_destroy(&scm);  in unix_stream_sendmsg()
1998 	struct scm_cookie scm;  in unix_stream_sendpage()  local
2044 		err = maybe_init_creds(&scm, socket, other);  in unix_stream_sendpage()
2053 	} else if (!skb || !unix_skb_scm_eq(skb, &scm)) {  in unix_stream_sendpage()
2080 		err = unix_scm_to_skb(&scm, skb, false);  in unix_stream_sendpage()
2092 	scm_destroy(&scm);  in unix_stream_sendpage()
2104 		scm_destroy(&scm);  in unix_stream_sendpage()
2151 	struct scm_cookie scm;  in unix_dgram_recvmsg()  local
2215 	memset(&scm, 0, sizeof(scm));  in unix_dgram_recvmsg()
2217 	scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);  in unix_dgram_recvmsg()
2218 	unix_set_secdata(&scm, skb);  in unix_dgram_recvmsg()
2222 			unix_detach_fds(&scm, skb);  in unix_dgram_recvmsg()
2242 			unix_peek_fds(&scm, skb);  in unix_dgram_recvmsg()
2246 	scm_recv(sock, msg, &scm, flags);  in unix_dgram_recvmsg()
2317 	struct scm_cookie scm;  in unix_stream_read_generic()  local
2345 	memset(&scm, 0, sizeof(scm));  in unix_stream_read_generic()
2395 				scm_destroy(&scm);  in unix_stream_read_generic()
2419 			if (!unix_skb_scm_eq(skb, &scm))  in unix_stream_read_generic()
2423 			scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);  in unix_stream_read_generic()
2424 			unix_set_secdata(&scm, skb);  in unix_stream_read_generic()
2470 				unix_detach_fds(&scm, skb);  in unix_stream_read_generic()
2479 			if (scm.fp)  in unix_stream_read_generic()
2485 				unix_peek_fds(&scm, skb);  in unix_stream_read_generic()
2506 		scm_recv(sock, state->msg, &scm, flags);  in unix_stream_read_generic()
2508 		scm_destroy(&scm);  in unix_stream_read_generic()