2 /* $KAME: udp6_output.c,v 1.14 2000/06/13 10:31:23 itojun Exp $ */
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65 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
68 #include "opt_ipsec.h"
71 #include <sys/param.h>
73 #include <sys/protosw.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/sysctl.h>
77 #include <sys/errno.h>
79 #include <sys/systm.h>
80 #include <sys/syslog.h>
83 #include <net/route.h>
84 #include <net/if_types.h>
86 #include <netinet/in.h>
87 #include <netinet/in_var.h>
88 #include <netinet/in_systm.h>
89 #include <netinet/ip.h>
90 #include <netinet/ip_var.h>
91 #include <netinet/in_pcb.h>
92 #include <netinet/udp.h>
93 #include <netinet/udp_var.h>
94 #include <netinet/ip6.h>
95 #include <netinet6/ip6_var.h>
96 #include <netinet6/in6_pcb.h>
97 #include <netinet6/udp6_var.h>
98 #include <netinet/icmp6.h>
99 #include <netinet6/ip6protosw.h>
102 #include <netinet6/ipsec.h>
104 #include <netinet6/ipsec6.h>
110 #include <net/net_osdep.h>
113 * UDP protocol inplementation.
114 * Per RFC 768, August, 1980.
118 #define udp6stat udpstat
119 #define udp6s_opackets udps_opackets
122 udp6_output(in6p, m, addr6, control, p)
123 register struct in6pcb *in6p;
124 register struct mbuf *m;
125 struct mbuf *control;
126 struct sockaddr *addr6;
129 register u_int32_t ulen = m->m_pkthdr.len;
130 u_int32_t plen = sizeof(struct udphdr) + ulen;
133 struct in6_addr *laddr, *faddr;
136 struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts;
140 struct sockaddr_in6 tmp;
146 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0)
148 in6p->in6p_outputopts = &opt;
153 * IPv4 version of udp_output calls in_pcbconnect in this case,
154 * which needs splnet and affects performance.
155 * Since we saw no essential reason for calling in_pcbconnect,
156 * we get rid of such kind of logic, and call in6_selectsrc
157 * and in6_pcbsetport in order to fill in the local address
158 * and the local port.
160 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr6;
161 if (sin6->sin6_port == 0) {
162 error = EADDRNOTAVAIL;
166 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
171 /* protect *sin6 from overwrites */
175 faddr = &sin6->sin6_addr;
176 fport = sin6->sin6_port; /* allow 0 port */
178 /* KAME hack: embed scopeid */
179 if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, NULL) != 0) {
184 if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
185 laddr = in6_selectsrc(sin6, in6p->in6p_outputopts,
188 &in6p->in6p_laddr, &error);
190 laddr = &in6p->in6p_laddr; /*XXX*/
193 error = EADDRNOTAVAIL;
196 if (in6p->in6p_lport == 0 &&
197 (error = in6_pcbsetport(laddr, in6p, p)) != 0)
200 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
204 laddr = &in6p->in6p_laddr;
205 faddr = &in6p->in6p_faddr;
206 fport = in6p->in6p_fport;
209 if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
211 hlen = sizeof(struct ip6_hdr);
214 hlen = sizeof(struct ip);
218 * Calculate data length and get a mbuf
219 * for UDP and IP6 headers.
221 M_PREPEND(m, hlen + sizeof(struct udphdr), M_DONTWAIT);
228 * Stuff checksum and output datagram.
230 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
231 udp6->uh_sport = in6p->in6p_lport; /* lport is always set in the PCB */
232 udp6->uh_dport = fport;
234 udp6->uh_ulen = htons((u_short)plen);
241 ip6 = mtod(m, struct ip6_hdr *);
242 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
243 ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
244 ip6->ip6_vfc |= IPV6_VERSION;
245 #if 0 /* ip6_plen will be filled in ip6_output. */
246 ip6->ip6_plen = htons((u_short)plen);
248 ip6->ip6_nxt = IPPROTO_UDP;
249 ip6->ip6_hlim = in6_selecthlim(in6p,
250 in6p->in6p_route.ro_rt ?
251 in6p->in6p_route.ro_rt->rt_ifp : NULL);
252 ip6->ip6_src = *laddr;
253 ip6->ip6_dst = *faddr;
255 if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP,
256 sizeof(struct ip6_hdr), plen)) == 0) {
257 udp6->uh_sum = 0xffff;
262 udp6stat.udp6s_opackets++;
264 ipsec_setsocket(m, in6p->in6p_socket);
266 error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route,
267 flags, in6p->in6p_moptions, NULL);
270 error = EAFNOSUPPORT;
280 in6p->in6p_outputopts = stickyopt;