diff options
Diffstat (limited to 'slirp/ip_input.c')
| -rw-r--r-- | slirp/ip_input.c | 80 |
1 files changed, 41 insertions, 39 deletions
diff --git a/slirp/ip_input.c b/slirp/ip_input.c index b07d3d5..35230f8 100644 --- a/slirp/ip_input.c +++ b/slirp/ip_input.c @@ -42,11 +42,8 @@ #include <osdep.h> #include "ip_icmp.h" -struct ipq ipq; - -static struct ip *ip_reass(register struct ip *ip, - register struct ipq *fp); -static void ip_freef(struct ipq *fp); +static struct ip *ip_reass(Slirp *slirp, struct ip *ip, struct ipq *fp); +static void ip_freef(Slirp *slirp, struct ipq *fp); static void ip_enq(register struct ipasfrag *p, register struct ipasfrag *prev); static void ip_deq(register struct ipasfrag *p); @@ -56,11 +53,11 @@ static void ip_deq(register struct ipasfrag *p); * All protocols not implemented in kernel go to raw IP protocol handler. */ void -ip_init(void) +ip_init(Slirp *slirp) { - ipq.ip_link.next = ipq.ip_link.prev = &ipq.ip_link; - udp_init(); - tcp_init(); + slirp->ipq.ip_link.next = slirp->ipq.ip_link.prev = &slirp->ipq.ip_link; + udp_init(slirp); + tcp_init(slirp); } /* @@ -70,6 +67,7 @@ ip_init(void) void ip_input(struct mbuf *m) { + Slirp *slirp = m->slirp; register struct ip *ip; int hlen; @@ -120,19 +118,19 @@ ip_input(struct mbuf *m) goto bad; } - if (slirp_restrict) { - if ((ip->ip_dst.s_addr & vnetwork_mask.s_addr) == - vnetwork_addr.s_addr) { + if (slirp->restricted) { + if ((ip->ip_dst.s_addr & slirp->vnetwork_mask.s_addr) == + slirp->vnetwork_addr.s_addr) { if (ip->ip_dst.s_addr == 0xffffffff && ip->ip_p != IPPROTO_UDP) goto bad; } else { + uint32_t inv_mask = ~slirp->vnetwork_mask.s_addr; struct ex_list *ex_ptr; - if ((ip->ip_dst.s_addr & ~vnetwork_mask.s_addr) == - ~vnetwork_mask.s_addr) + if ((ip->ip_dst.s_addr & inv_mask) == inv_mask) { goto bad; - - for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) + } + for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) if (ex_ptr->ex_addr.s_addr == ip->ip_dst.s_addr) break; @@ -167,7 +165,8 @@ ip_input(struct mbuf *m) * Look for queue of fragments * of this datagram. */ - for (l = ipq.ip_link.next; l != &ipq.ip_link; l = l->next) { + for (l = slirp->ipq.ip_link.next; l != &slirp->ipq.ip_link; + l = l->next) { fp = container_of(l, struct ipq, ip_link); if (ip->ip_id == fp->ipq_id && ip->ip_src.s_addr == fp->ipq_src.s_addr && @@ -197,13 +196,13 @@ ip_input(struct mbuf *m) * attempt reassembly; if it succeeds, proceed. */ if (ip->ip_tos & 1 || ip->ip_off) { - ip = ip_reass(ip, fp); + ip = ip_reass(slirp, ip, fp); if (ip == NULL) return; - m = dtom(ip); + m = dtom(slirp, ip); } else if (fp) - ip_freef(fp); + ip_freef(slirp, fp); } else ip->ip_len -= hlen; @@ -239,9 +238,9 @@ bad: * is given as fp; otherwise have to make a chain. */ static struct ip * -ip_reass(register struct ip *ip, register struct ipq *fp) +ip_reass(Slirp *slirp, struct ip *ip, struct ipq *fp) { - register struct mbuf *m = dtom(ip); + register struct mbuf *m = dtom(slirp, ip); register struct ipasfrag *q; int hlen = ip->ip_hl << 2; int i, next; @@ -263,10 +262,13 @@ ip_reass(register struct ip *ip, register struct ipq *fp) * If first fragment to arrive, create a reassembly queue. */ if (fp == NULL) { - struct mbuf *t; - if ((t = m_get()) == NULL) goto dropfrag; + struct mbuf *t = m_get(slirp); + + if (t == NULL) { + goto dropfrag; + } fp = mtod(t, struct ipq *); - insque(&fp->ip_link, &ipq.ip_link); + insque(&fp->ip_link, &slirp->ipq.ip_link); fp->ipq_ttl = IPFRAGTTL; fp->ipq_p = ip->ip_p; fp->ipq_id = ip->ip_id; @@ -296,7 +298,7 @@ ip_reass(register struct ip *ip, register struct ipq *fp) if (i > 0) { if (i >= ip->ip_len) goto dropfrag; - m_adj(dtom(ip), i); + m_adj(dtom(slirp, ip), i); ip->ip_off += i; ip->ip_len -= i; } @@ -312,11 +314,11 @@ ip_reass(register struct ip *ip, register struct ipq *fp) if (i < q->ipf_len) { q->ipf_len -= i; q->ipf_off += i; - m_adj(dtom(q), i); + m_adj(dtom(slirp, q), i); break; } q = q->ipf_next; - m_freem(dtom(q->ipf_prev)); + m_freem(dtom(slirp, q->ipf_prev)); ip_deq(q->ipf_prev); } @@ -340,11 +342,11 @@ insert: * Reassembly is complete; concatenate fragments. */ q = fp->frag_link.next; - m = dtom(q); + m = dtom(slirp, q); q = (struct ipasfrag *) q->ipf_next; while (q != (struct ipasfrag*)&fp->frag_link) { - struct mbuf *t = dtom(q); + struct mbuf *t = dtom(slirp, q); q = (struct ipasfrag *) q->ipf_next; m_cat(m, t); } @@ -375,7 +377,7 @@ insert: ip->ip_src = fp->ipq_src; ip->ip_dst = fp->ipq_dst; remque(&fp->ip_link); - (void) m_free(dtom(fp)); + (void) m_free(dtom(slirp, fp)); m->m_len += (ip->ip_hl << 2); m->m_data -= (ip->ip_hl << 2); @@ -391,17 +393,17 @@ dropfrag: * associated datagrams. */ static void -ip_freef(struct ipq *fp) +ip_freef(Slirp *slirp, struct ipq *fp) { register struct ipasfrag *q, *p; for (q = fp->frag_link.next; q != (struct ipasfrag*)&fp->frag_link; q = p) { p = q->ipf_next; ip_deq(q); - m_freem(dtom(q)); + m_freem(dtom(slirp, q)); } remque(&fp->ip_link); - (void) m_free(dtom(fp)); + (void) m_free(dtom(slirp, fp)); } /* @@ -435,24 +437,24 @@ ip_deq(register struct ipasfrag *p) * queue, discard it. */ void -ip_slowtimo(void) +ip_slowtimo(Slirp *slirp) { struct qlink *l; DEBUG_CALL("ip_slowtimo"); - l = ipq.ip_link.next; + l = slirp->ipq.ip_link.next; if (l == NULL) return; - while (l != &ipq.ip_link) { + while (l != &slirp->ipq.ip_link) { struct ipq *fp = container_of(l, struct ipq, ip_link); l = l->next; if (--fp->ipq_ttl == 0) { - ip_freef(fp); + ip_freef(slirp, fp); } - } + } } /* |