1*8401Swnj /* raw_ip.c 4.14 82/10/09 */ 25123Swnj 35123Swnj #include "../h/param.h" 45123Swnj #include "../h/mbuf.h" 55123Swnj #include "../h/socket.h" 65612Swnj #include "../h/protosw.h" 75123Swnj #include "../h/socketvar.h" 86509Ssam #include "../net/if.h" 9*8401Swnj #include "../netinet/in.h" 10*8401Swnj #include "../netinet/in_systm.h" 11*8401Swnj #include "../netinet/ip.h" 12*8401Swnj #include "../netinet/ip_var.h" 135612Swnj #include "../net/raw_cb.h" 147156Swnj #include "../net/route.h" 156509Ssam #include <errno.h> 165123Swnj 175123Swnj /* 185612Swnj * Raw interface to IP protocol. 195123Swnj */ 205612Swnj 216339Ssam static struct sockaddr_in ripdst = { AF_INET }; 226339Ssam static struct sockaddr_in ripsrc = { AF_INET }; 236339Ssam static struct sockproto ripproto = { PF_INET }; 245612Swnj /* 255612Swnj * Setup generic address and protocol structures 265612Swnj * for raw_input routine, then pass them along with 275612Swnj * mbuf chain. 285612Swnj */ 295123Swnj rip_input(m) 305123Swnj struct mbuf *m; 315123Swnj { 325612Swnj register struct ip *ip = mtod(m, struct ip *); 335123Swnj 345612Swnj ripproto.sp_protocol = ip->ip_p; 355646Ssam ripdst.sin_addr = ip->ip_dst; 365646Ssam ripsrc.sin_addr = ip->ip_src; 376529Ssam raw_input(m, &ripproto, (struct sockaddr *)&ripsrc, 386529Ssam (struct sockaddr *)&ripdst); 395123Swnj } 405123Swnj 415612Swnj /* 425612Swnj * Generate IP header and pass packet to ip_output. 435612Swnj * Tack on options user may have setup with control call. 445612Swnj */ 455612Swnj rip_output(m0, so) 465612Swnj struct mbuf *m0; 475612Swnj struct socket *so; 485123Swnj { 495612Swnj register struct mbuf *m; 505612Swnj register struct ip *ip; 516509Ssam int len = 0, error; 526509Ssam struct rawcb *rp = sotorawcb(so); 536509Ssam struct ifnet *ifp; 547156Swnj struct sockaddr_in *sin; 555123Swnj 565612Swnj /* 575612Swnj * Calculate data length and get an mbuf 585612Swnj * for IP header. 595612Swnj */ 605612Swnj for (m = m0; m; m = m->m_next) 615612Swnj len += m->m_len; 625612Swnj m = m_get(M_DONTWAIT); 635612Swnj if (m == 0) { 646509Ssam error = ENOBUFS; 656509Ssam goto bad; 665612Swnj } 675612Swnj 685612Swnj /* 695612Swnj * Fill in IP header as needed. 705612Swnj */ 715612Swnj m->m_off = MMAXOFF - sizeof(struct ip); 725612Swnj m->m_len = sizeof(struct ip); 735612Swnj m->m_next = m0; 745612Swnj ip = mtod(m, struct ip *); 755612Swnj ip->ip_p = so->so_proto->pr_protocol; 765612Swnj ip->ip_len = sizeof(struct ip) + len; 777156Swnj if (rp->rcb_flags & RAW_LADDR) { 787156Swnj sin = (struct sockaddr_in *)&rp->rcb_laddr; 797156Swnj if (sin->sin_family != AF_INET) { 806509Ssam error = EAFNOSUPPORT; 816509Ssam goto bad; 826509Ssam } 837156Swnj ip->ip_src.s_addr = sin->sin_addr.s_addr; 847156Swnj } else 857156Swnj ip->ip_src.s_addr = 0; 867156Swnj ip->ip_dst = ((struct sockaddr_in *)&rp->rcb_faddr)->sin_addr; 875612Swnj ip->ip_ttl = MAXTTL; 887156Swnj return (ip_output(m, (struct mbuf *)0, &routetoif, 1)); 896509Ssam bad: 906509Ssam m_freem(m); 916509Ssam return (error); 925123Swnj } 93