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head/sys/kern/uipc_socket.c
| Show First 20 Lines • Show All 2,050 Lines • ▼ Show 20 Lines | dontblock: | ||||
| * Process one or more MT_CONTROL mbufs present before any data mbufs | * Process one or more MT_CONTROL mbufs present before any data mbufs | ||||
| * in the first mbuf chain on the socket buffer. If MSG_PEEK, we | * in the first mbuf chain on the socket buffer. If MSG_PEEK, we | ||||
| * just copy the data; if !MSG_PEEK, we call into the protocol to | * just copy the data; if !MSG_PEEK, we call into the protocol to | ||||
| * perform externalization (or freeing if controlp == NULL). | * perform externalization (or freeing if controlp == NULL). | ||||
| */ | */ | ||||
| if (m != NULL && m->m_type == MT_CONTROL) { | if (m != NULL && m->m_type == MT_CONTROL) { | ||||
| struct mbuf *cm = NULL, *cmn; | struct mbuf *cm = NULL, *cmn; | ||||
| struct mbuf **cme = &cm; | struct mbuf **cme = &cm; | ||||
| #ifdef KERN_TLS | |||||
| struct cmsghdr *cmsg; | |||||
| struct tls_get_record tgr; | |||||
| /* | |||||
| * For MSG_TLSAPPDATA, check for a non-application data | |||||
| * record. If found, return ENXIO without removing | |||||
| * it from the receive queue. This allows a subsequent | |||||
| * call without MSG_TLSAPPDATA to receive it. | |||||
| * Note that, for TLS, there should only be a single | |||||
| * control mbuf with the TLS_GET_RECORD message in it. | |||||
| */ | |||||
| if (flags & MSG_TLSAPPDATA) { | |||||
| cmsg = mtod(m, struct cmsghdr *); | |||||
| if (cmsg->cmsg_type == TLS_GET_RECORD && | |||||
| cmsg->cmsg_len == CMSG_LEN(sizeof(tgr))) { | |||||
| memcpy(&tgr, CMSG_DATA(cmsg), sizeof(tgr)); | |||||
| /* This will need to change for TLS 1.3. */ | |||||
| if (tgr.tls_type != TLS_RLTYPE_APP) { | |||||
| SOCKBUF_UNLOCK(&so->so_rcv); | |||||
| error = ENXIO; | |||||
| goto release; | |||||
| } | |||||
| } | |||||
| } | |||||
| #endif | |||||
| do { | do { | ||||
| if (flags & MSG_PEEK) { | if (flags & MSG_PEEK) { | ||||
| if (controlp != NULL) { | if (controlp != NULL) { | ||||
| *controlp = m_copym(m, 0, m->m_len, | *controlp = m_copym(m, 0, m->m_len, | ||||
| M_NOWAIT); | M_NOWAIT); | ||||
| controlp = &(*controlp)->m_next; | controlp = &(*controlp)->m_next; | ||||
| } | } | ||||
| ▲ Show 20 Lines • Show All 2,332 Lines • Show Last 20 Lines | |||||