diff options
Diffstat (limited to 'sysdep/linux/krt-scan.c')
| -rw-r--r-- | sysdep/linux/krt-scan.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/sysdep/linux/krt-scan.c b/sysdep/linux/krt-scan.c deleted file mode 100644 index 8591607e..00000000 --- a/sysdep/linux/krt-scan.c +++ /dev/null @@ -1,199 +0,0 @@ -/* - * BIRD -- Linux Routing Table Scanning - * - * (c) 1998--2000 Martin Mares <mj@ucw.cz> - * - * Can be freely distributed and used under the terms of the GNU GPL. - */ - -#include <stdio.h> -#include <ctype.h> -#include <fcntl.h> -#include <unistd.h> -#include <net/route.h> - -#undef LOCAL_DEBUG - -#include "nest/bird.h" -#include "nest/route.h" -#include "nest/protocol.h" -#include "nest/iface.h" -#include "lib/timer.h" -#include "lib/unix.h" -#include "lib/krt.h" -#include "lib/string.h" - -static int krt_scan_fd = -1; - -struct iface * -krt_temp_iface(struct krt_proto *p, char *name) -{ - struct iface *i; - - WALK_LIST(i, p->scan.temp_ifs) - if (!strcmp(i->name, name)) - return i; - i = mb_allocz(p->p.pool, sizeof(struct iface)); - strcpy(i->name, name); - add_tail(&p->scan.temp_ifs, &i->n); - return i; -} - -static void -krt_parse_entry(byte *ent, struct krt_proto *p) -{ - u32 dest0, gw0, mask0; - ip_addr dest, gw, mask; - unsigned int flags; - int masklen; - net *net; - byte *iface = ent; - rte *e; - - if (sscanf(ent, "%*s\t%x\t%x\t%x\t%*d\t%*d\t%*d\t%x\t", &dest0, &gw0, &flags, &mask0) != 4) - { - log(L_ERR "krt read: unable to parse `%s'", ent); - return; - } - while (*ent != '\t') - ent++; - *ent = 0; - - dest = ipa_from_u32(dest0); - ipa_ntoh(dest); - gw = ipa_from_u32(gw0); - ipa_ntoh(gw); - mask = ipa_from_u32(mask0); - ipa_ntoh(mask); - if ((masklen = ipa_mklen(mask)) < 0) - { - log(L_ERR "krt read: invalid netmask %08x", mask0); - return; - } - DBG("Got %I/%d via %I flags %x\n", dest, masklen, gw, flags); - - if (!(flags & RTF_UP)) - { - DBG("Down.\n"); - return; - } - if (flags & RTF_HOST) - masklen = 32; - if (flags & (RTF_DYNAMIC | RTF_MODIFIED)) /* Redirect route */ - { - log(L_WARN "krt: Ignoring redirect to %I/%d via %I", dest, masklen, gw); - return; - } - - net = net_get(p->p.table, dest, masklen); - - rta a = { - .proto = &p->p, - .source = RTS_INHERIT, - .scope = SCOPE_UNIVERSE, - .cast = RTC_UNICAST - }; - - if (flags & RTF_GATEWAY) - { - neighbor *ng = neigh_find(&p->p, &gw, 0); - if (ng && ng->scope) - a.iface = ng->iface; - else - { - log(L_WARN "Kernel told us to use non-neighbor %I for %I/%d", gw, net->n.prefix, net->n.pxlen); - return; - } - a.dest = RTD_ROUTER; - a.gw = gw; - } - else if (flags & RTF_REJECT) - { - a.dest = RTD_UNREACHABLE; - a.gw = IPA_NONE; - } - else if (isalpha(iface[0])) - { - a.dest = RTD_DEVICE; - a.gw = IPA_NONE; - a.iface = krt_temp_iface(p, iface); - } - else - { - log(L_WARN "Kernel reporting unknown route type to %I/%d", net->n.prefix, net->n.pxlen); - return; - } - - e = rte_get_temp(&a); - e->net = net; - e->u.krt.src = KRT_SRC_UNKNOWN; - krt_got_route(p, e); -} - -void -krt_scan_fire(struct krt_proto *p) -{ - byte buf[32768]; - int l, seen_hdr; - - if (krt_scan_fd < 0) - { - krt_scan_fd = open("/proc/net/route", O_RDONLY); - if (krt_scan_fd < 0) - die("/proc/net/route: %m"); - } - else if (lseek(krt_scan_fd, 0, SEEK_SET) < 0) - { - log(L_ERR "krt seek: %m"); - return; - } - seen_hdr = 0; - while ((l = read(krt_scan_fd, buf, sizeof(buf))) > 0) - { - byte *z = buf; - if (l & 127) - { - log(L_ERR "krt read: misaligned entry: l=%d", l); - return; - } - while (l >= 128) - { - if (seen_hdr++) - krt_parse_entry(z, p); - z += 128; - l -= 128; - } - } - if (l < 0) - { - log(L_ERR "krt read: %m"); - return; - } - DBG("KRT scan done, seen %d lines\n", seen_hdr); -} - -void -krt_scan_construct(struct krt_config *c) -{ -} - -void -krt_scan_preconfig(struct config *c) -{ -} - -void -krt_scan_postconfig(struct krt_config *c) -{ -} - -void -krt_scan_start(struct krt_proto *x, int first) -{ - init_list(&x->scan.temp_ifs); -} - -void -krt_scan_shutdown(struct krt_proto *x, int last) -{ -} |