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sys/netinet6/udp6_usrreq.c
| Show First 20 Lines • Show All 697 Lines • ▼ Show 20 Lines | udp6_output(struct socket *so, int flags_arg, struct mbuf *m, | ||||
| u_int32_t ulen, plen; | u_int32_t ulen, plen; | ||||
| uint16_t cscov; | uint16_t cscov; | ||||
| u_short fport; | u_short fport; | ||||
| uint8_t nxt, unlock_inp, unlock_udbinfo; | uint8_t nxt, unlock_inp, unlock_udbinfo; | ||||
| /* addr6 has been validated in udp6_send(). */ | /* addr6 has been validated in udp6_send(). */ | ||||
| sin6 = (struct sockaddr_in6 *)addr6; | sin6 = (struct sockaddr_in6 *)addr6; | ||||
| /* | |||||
| * In contrast to to IPv4 we do not validate the max. packet length | |||||
| * here due to IPv6 Jumbograms (RFC2675). | |||||
| */ | |||||
| scope_ambiguous = 0; | scope_ambiguous = 0; | ||||
| if (sin6) { | if (sin6) { | ||||
| /* Protect *addr6 from overwrites. */ | /* Protect *addr6 from overwrites. */ | ||||
| tmp = *sin6; | tmp = *sin6; | ||||
| sin6 = &tmp; | sin6 = &tmp; | ||||
| /* | /* | ||||
| * Application should provide a proper zone ID or the use of | * Application should provide a proper zone ID or the use of | ||||
| ▲ Show 20 Lines • Show All 167 Lines • ▼ Show 20 Lines | if (sin6) { | ||||
| faddr = &inp->in6p_faddr; | faddr = &inp->in6p_faddr; | ||||
| fport = inp->inp_fport; | fport = inp->inp_fport; | ||||
| } | } | ||||
| ulen = m->m_pkthdr.len; | ulen = m->m_pkthdr.len; | ||||
| plen = sizeof(struct udphdr) + ulen; | plen = sizeof(struct udphdr) + ulen; | ||||
| hlen = sizeof(struct ip6_hdr); | hlen = sizeof(struct ip6_hdr); | ||||
| if (plen > IPV6_MAXPACKET) { | |||||
| error = EMSGSIZE; | |||||
| goto release; | |||||
| } | |||||
| /* | /* | ||||
| * Calculate data length and get a mbuf | * Calculate data length and get a mbuf | ||||
| * for UDP and IP6 headers. | * for UDP and IP6 headers. | ||||
| */ | */ | ||||
| M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); | M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); | ||||
| if (m == NULL) { | if (m == NULL) { | ||||
| error = ENOBUFS; | error = ENOBUFS; | ||||
| goto release; | goto release; | ||||
| Show All 14 Lines | if (nxt == IPPROTO_UDPLITE) { | ||||
| if (cscov >= plen) | if (cscov >= plen) | ||||
| cscov = 0; | cscov = 0; | ||||
| udp6->uh_ulen = htons(cscov); | udp6->uh_ulen = htons(cscov); | ||||
| /* | /* | ||||
| * For UDP-Lite, checksum coverage length of zero means | * For UDP-Lite, checksum coverage length of zero means | ||||
| * the entire UDPLite packet is covered by the checksum. | * the entire UDPLite packet is covered by the checksum. | ||||
| */ | */ | ||||
| cscov_partial = (cscov == 0) ? 0 : 1; | cscov_partial = (cscov == 0) ? 0 : 1; | ||||
| } else if (plen <= 0xffff) | } else | ||||
| udp6->uh_ulen = htons((u_short)plen); | udp6->uh_ulen = htons((u_short)plen); | ||||
| else | |||||
| udp6->uh_ulen = 0; | |||||
| udp6->uh_sum = 0; | udp6->uh_sum = 0; | ||||
| ip6 = mtod(m, struct ip6_hdr *); | ip6 = mtod(m, struct ip6_hdr *); | ||||
| ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; | ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; | ||||
| ip6->ip6_vfc &= ~IPV6_VERSION_MASK; | ip6->ip6_vfc &= ~IPV6_VERSION_MASK; | ||||
| ip6->ip6_vfc |= IPV6_VERSION; | ip6->ip6_vfc |= IPV6_VERSION; | ||||
| ip6->ip6_plen = htons((u_short)plen); | ip6->ip6_plen = htons((u_short)plen); | ||||
| ip6->ip6_nxt = nxt; | ip6->ip6_nxt = nxt; | ||||
| ▲ Show 20 Lines • Show All 445 Lines • Show Last 20 Lines | |||||