495 lines
10 KiB
C
495 lines
10 KiB
C
/*
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ip.c
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Copyright 1995 Philip Homburg
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*/
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#include "inet.h"
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#include "buf.h"
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#include "event.h"
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#include "type.h"
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#include "arp.h"
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#include "assert.h"
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#include "clock.h"
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#include "eth.h"
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#include "icmp.h"
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#include "icmp_lib.h"
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#include "io.h"
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#include "ip.h"
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#include "ip_int.h"
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#include "ipr.h"
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#include "sr.h"
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THIS_FILE
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static void ip_close ARGS(( int fd ));
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static int ip_cancel ARGS(( int fd, int which_operation ));
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static int ip_select ARGS(( int fd, unsigned operations ));
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static void ip_buffree ARGS(( int priority ));
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#ifdef BUF_CONSISTENCY_CHECK
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static void ip_bufcheck ARGS(( void ));
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#endif
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static void ip_bad_callback ARGS(( struct ip_port *ip_port ));
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ip_port_t *ip_port_table;
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ip_fd_t ip_fd_table[IP_FD_NR];
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ip_ass_t ip_ass_table[IP_ASS_NR];
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void ip_prep()
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{
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ip_port_table= alloc(ip_conf_nr * sizeof(ip_port_table[0]));
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icmp_prep();
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}
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void ip_init()
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{
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int i, j, result;
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ip_ass_t *ip_ass;
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ip_fd_t *ip_fd;
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ip_port_t *ip_port;
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struct ip_conf *icp;
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assert (BUF_S >= sizeof(struct nwio_ethopt));
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assert (BUF_S >= IP_MAX_HDR_SIZE + ETH_HDR_SIZE);
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assert (BUF_S >= sizeof(nwio_ipopt_t));
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assert (BUF_S >= sizeof(nwio_route_t));
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for (i=0, ip_ass= ip_ass_table; i<IP_ASS_NR; i++, ip_ass++)
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{
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ip_ass->ia_frags= 0;
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ip_ass->ia_first_time= 0;
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ip_ass->ia_port= 0;
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}
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for (i=0, ip_fd= ip_fd_table; i<IP_FD_NR; i++, ip_fd++)
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{
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ip_fd->if_flags= IFF_EMPTY;
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ip_fd->if_rdbuf_head= 0;
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}
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for (i=0, ip_port= ip_port_table, icp= ip_conf;
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i<ip_conf_nr; i++, ip_port++, icp++)
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{
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ip_port->ip_port= i;
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ip_port->ip_flags= IPF_EMPTY;
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ip_port->ip_dev_main= (ip_dev_t)ip_bad_callback;
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ip_port->ip_dev_set_ipaddr= (ip_dev_t)ip_bad_callback;
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ip_port->ip_dev_send= (ip_dev_send_t)ip_bad_callback;
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ip_port->ip_dl_type= icp->ic_devtype;
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ip_port->ip_mtu= IP_DEF_MTU;
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ip_port->ip_mtu_max= IP_MAX_PACKSIZE;
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switch(ip_port->ip_dl_type)
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{
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case IPDL_ETH:
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ip_port->ip_dl.dl_eth.de_port= icp->ic_port;
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result= ipeth_init(ip_port);
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if (result == -1)
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continue;
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assert(result == NW_OK);
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break;
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case IPDL_PSIP:
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ip_port->ip_dl.dl_ps.ps_port= icp->ic_port;
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result= ipps_init(ip_port);
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if (result == -1)
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continue;
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assert(result == NW_OK);
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break;
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default:
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ip_panic(( "unknown ip_dl_type %d",
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ip_port->ip_dl_type ));
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break;
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}
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ip_port->ip_loopb_head= NULL;
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ip_port->ip_loopb_tail= NULL;
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ev_init(&ip_port->ip_loopb_event);
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ip_port->ip_routeq_head= NULL;
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ip_port->ip_routeq_tail= NULL;
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ev_init(&ip_port->ip_routeq_event);
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ip_port->ip_flags |= IPF_CONFIGURED;
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ip_port->ip_proto_any= NULL;
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for (j= 0; j<IP_PROTO_HASH_NR; j++)
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ip_port->ip_proto[j]= NULL;
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}
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#ifndef BUF_CONSISTENCY_CHECK
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bf_logon(ip_buffree);
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#else
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bf_logon(ip_buffree, ip_bufcheck);
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#endif
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icmp_init();
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ipr_init();
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for (i=0, ip_port= ip_port_table; i<ip_conf_nr; i++, ip_port++)
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{
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if (!(ip_port->ip_flags & IPF_CONFIGURED))
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continue;
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ip_port->ip_frame_id= (u16_t)get_time();
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sr_add_minor(if2minor(ip_conf[i].ic_ifno, IP_DEV_OFF),
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i, ip_open, ip_close, ip_read,
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ip_write, ip_ioctl, ip_cancel, ip_select);
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(*ip_port->ip_dev_main)(ip_port);
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}
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}
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static int ip_cancel (fd, which_operation)
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int fd;
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int which_operation;
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{
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ip_fd_t *ip_fd;
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acc_t *repl_res;
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int result;
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ip_fd= &ip_fd_table[fd];
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switch (which_operation)
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{
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case SR_CANCEL_IOCTL:
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assert (ip_fd->if_flags & IFF_IOCTL_IP);
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ip_fd->if_flags &= ~IFF_IOCTL_IP;
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repl_res= (*ip_fd->if_get_userdata)(ip_fd->if_srfd,
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(size_t)EINTR, (size_t)0, TRUE);
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assert (!repl_res);
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break;
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case SR_CANCEL_READ:
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assert (ip_fd->if_flags & IFF_READ_IP);
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ip_fd->if_flags &= ~IFF_READ_IP;
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result= (*ip_fd->if_put_userdata)(ip_fd->if_srfd,
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(size_t)EINTR, (acc_t *)0, FALSE);
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assert (!result);
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break;
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#if 0
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case SR_CANCEL_WRITE:
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assert(0);
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assert (ip_fd->if_flags & IFF_WRITE_MASK);
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ip_fd->if_flags &= ~IFF_WRITE_MASK;
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repl_res= (*ip_fd->if_get_userdata)(ip_fd->if_srfd,
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(size_t)EINTR, (size_t)0, FALSE);
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assert (!repl_res);
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break;
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#endif
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default:
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ip_panic(( "unknown cancel request" ));
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break;
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}
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return NW_OK;
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}
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static int ip_select(fd, operations)
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int fd;
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unsigned operations;
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{
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unsigned resops;
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ip_fd_t *ip_fd;
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ip_fd= &ip_fd_table[fd];
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assert (ip_fd->if_flags & IFF_INUSE);
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resops= 0;
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if (operations & SR_SELECT_READ)
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{
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if (ip_sel_read(ip_fd))
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resops |= SR_SELECT_READ;
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else if (!(operations & SR_SELECT_POLL))
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ip_fd->if_flags |= IFF_SEL_READ;
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}
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if (operations & SR_SELECT_WRITE)
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{
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/* Should handle special case when the interface is down */
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resops |= SR_SELECT_WRITE;
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}
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if (operations & SR_SELECT_EXCEPTION)
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{
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printf("ip_select: not implemented for exceptions\n");
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}
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return resops;
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}
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int ip_open (port, srfd, get_userdata, put_userdata, put_pkt,
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select_res)
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int port;
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int srfd;
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get_userdata_t get_userdata;
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put_userdata_t put_userdata;
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put_pkt_t put_pkt;
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select_res_t select_res;
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{
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int i;
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ip_fd_t *ip_fd;
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ip_port_t *ip_port;
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ip_port= &ip_port_table[port];
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if (!(ip_port->ip_flags & IPF_CONFIGURED))
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return ENXIO;
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for (i=0; i<IP_FD_NR && (ip_fd_table[i].if_flags & IFF_INUSE);
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i++);
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if (i>=IP_FD_NR)
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{
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DBLOCK(1, printf("out of fds\n"));
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return EAGAIN;
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}
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ip_fd= &ip_fd_table[i];
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ip_fd->if_flags= IFF_INUSE;
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ip_fd->if_ipopt.nwio_flags= NWIO_DEFAULT;
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ip_fd->if_ipopt.nwio_tos= 0;
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ip_fd->if_ipopt.nwio_df= FALSE;
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ip_fd->if_ipopt.nwio_ttl= 255;
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ip_fd->if_ipopt.nwio_hdropt.iho_opt_siz= 0;
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ip_fd->if_port= ip_port;
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ip_fd->if_srfd= srfd;
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assert(ip_fd->if_rdbuf_head == NULL);
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ip_fd->if_get_userdata= get_userdata;
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ip_fd->if_put_userdata= put_userdata;
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ip_fd->if_put_pkt= put_pkt;
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ip_fd->if_select_res= select_res;
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return i;
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}
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static void ip_close (fd)
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int fd;
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{
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ip_fd_t *ip_fd;
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acc_t *pack;
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ip_fd= &ip_fd_table[fd];
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assert ((ip_fd->if_flags & IFF_INUSE) &&
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!(ip_fd->if_flags & IFF_BUSY));
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if (ip_fd->if_flags & IFF_OPTSET)
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ip_unhash_proto(ip_fd);
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while (ip_fd->if_rdbuf_head)
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{
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pack= ip_fd->if_rdbuf_head;
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ip_fd->if_rdbuf_head= pack->acc_ext_link;
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bf_afree(pack);
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}
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ip_fd->if_flags= IFF_EMPTY;
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}
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static void ip_buffree(priority)
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int priority;
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{
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int i;
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ip_port_t *ip_port;
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ip_fd_t *ip_fd;
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ip_ass_t *ip_ass;
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acc_t *pack, *next_pack;
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for (i= 0, ip_port= ip_port_table; i<ip_conf_nr; i++, ip_port++)
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{
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if (ip_port->ip_dl_type == IPDL_ETH)
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{
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/* Can't free de_frame.
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* bf_check_acc(ip_port->ip_dl.dl_eth.de_frame);
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*/
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if (priority == IP_PRI_PORTBUFS)
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{
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next_pack= ip_port->ip_dl.dl_eth.de_arp_head;
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while(next_pack != NULL)
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{
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pack= next_pack;
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next_pack= pack->acc_ext_link;
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bf_afree(pack);
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}
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ip_port->ip_dl.dl_eth.de_arp_head= next_pack;
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next_pack= ip_port->ip_dl.dl_eth.de_q_head;
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while(next_pack != NULL)
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{
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pack= next_pack;
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next_pack= pack->acc_ext_link;
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bf_afree(pack);
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}
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ip_port->ip_dl.dl_eth.de_q_head= next_pack;
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}
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}
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else if (ip_port->ip_dl_type == IPDL_PSIP)
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{
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if (priority == IP_PRI_PORTBUFS)
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{
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next_pack= ip_port->ip_dl.dl_ps.ps_send_head;
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while (next_pack != NULL)
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{
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pack= next_pack;
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next_pack= pack->acc_ext_link;
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bf_afree(pack);
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}
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ip_port->ip_dl.dl_ps.ps_send_head= next_pack;
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}
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}
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if (priority == IP_PRI_PORTBUFS)
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{
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next_pack= ip_port->ip_loopb_head;
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while(next_pack && next_pack->acc_ext_link)
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{
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pack= next_pack;
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next_pack= pack->acc_ext_link;
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bf_afree(pack);
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}
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if (next_pack)
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{
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if (ev_in_queue(&ip_port->ip_loopb_event))
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{
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#if DEBUG
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printf(
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"not freeing ip_loopb_head, ip_loopb_event enqueued\n");
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#endif
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}
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else
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{
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bf_afree(next_pack);
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next_pack= NULL;
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}
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}
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ip_port->ip_loopb_head= next_pack;
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next_pack= ip_port->ip_routeq_head;
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while(next_pack && next_pack->acc_ext_link)
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{
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pack= next_pack;
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next_pack= pack->acc_ext_link;
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bf_afree(pack);
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}
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if (next_pack)
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{
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if (ev_in_queue(&ip_port->ip_routeq_event))
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{
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#if DEBUG
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printf(
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"not freeing ip_loopb_head, ip_routeq_event enqueued\n");
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#endif
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}
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else
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{
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bf_afree(next_pack);
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next_pack= NULL;
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}
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}
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ip_port->ip_routeq_head= next_pack;
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}
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}
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if (priority == IP_PRI_FDBUFS_EXTRA)
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{
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for (i= 0, ip_fd= ip_fd_table; i<IP_FD_NR; i++, ip_fd++)
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{
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while (ip_fd->if_rdbuf_head &&
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ip_fd->if_rdbuf_head->acc_ext_link)
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{
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pack= ip_fd->if_rdbuf_head;
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ip_fd->if_rdbuf_head= pack->acc_ext_link;
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bf_afree(pack);
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}
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}
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}
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if (priority == IP_PRI_FDBUFS)
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{
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for (i= 0, ip_fd= ip_fd_table; i<IP_FD_NR; i++, ip_fd++)
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{
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while (ip_fd->if_rdbuf_head)
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{
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pack= ip_fd->if_rdbuf_head;
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ip_fd->if_rdbuf_head= pack->acc_ext_link;
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bf_afree(pack);
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}
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}
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}
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if (priority == IP_PRI_ASSBUFS)
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{
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for (i= 0, ip_ass= ip_ass_table; i<IP_ASS_NR; i++, ip_ass++)
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{
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while(ip_ass->ia_frags != NULL)
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{
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pack= ip_ass->ia_frags;
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ip_ass->ia_frags= pack->acc_ext_link;
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bf_afree(pack);
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}
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ip_ass->ia_first_time= 0;
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}
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}
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}
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#ifdef BUF_CONSISTENCY_CHECK
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static void ip_bufcheck()
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{
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int i;
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ip_port_t *ip_port;
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ip_fd_t *ip_fd;
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ip_ass_t *ip_ass;
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acc_t *pack;
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for (i= 0, ip_port= ip_port_table; i<ip_conf_nr; i++, ip_port++)
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{
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if (ip_port->ip_dl_type == IPDL_ETH)
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{
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bf_check_acc(ip_port->ip_dl.dl_eth.de_frame);
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for (pack= ip_port->ip_dl.dl_eth.de_q_head; pack;
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pack= pack->acc_ext_link)
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{
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bf_check_acc(pack);
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}
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for (pack= ip_port->ip_dl.dl_eth.de_arp_head; pack;
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pack= pack->acc_ext_link)
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{
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bf_check_acc(pack);
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}
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}
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else if (ip_port->ip_dl_type == IPDL_PSIP)
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{
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for (pack= ip_port->ip_dl.dl_ps.ps_send_head; pack;
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pack= pack->acc_ext_link)
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{
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bf_check_acc(pack);
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}
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}
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for (pack= ip_port->ip_loopb_head; pack;
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pack= pack->acc_ext_link)
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{
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bf_check_acc(pack);
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}
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for (pack= ip_port->ip_routeq_head; pack;
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pack= pack->acc_ext_link)
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{
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bf_check_acc(pack);
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}
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}
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for (i= 0, ip_fd= ip_fd_table; i<IP_FD_NR; i++, ip_fd++)
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{
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for (pack= ip_fd->if_rdbuf_head; pack;
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pack= pack->acc_ext_link)
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{
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bf_check_acc(pack);
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}
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}
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for (i= 0, ip_ass= ip_ass_table; i<IP_ASS_NR; i++, ip_ass++)
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{
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for (pack= ip_ass->ia_frags; pack; pack= pack->acc_ext_link)
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bf_check_acc(pack);
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}
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}
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#endif /* BUF_CONSISTENCY_CHECK */
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__dead
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static void ip_bad_callback(ip_port)
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struct ip_port *ip_port;
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{
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ip_panic(( "no callback filled in for port %d", ip_port->ip_port ));
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}
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/*
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* $PchId: ip.c,v 1.19 2005/06/28 14:17:40 philip Exp $
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*/
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