diff options
Diffstat (limited to 'qemu/slirp/socket.c')
-rw-r--r-- | qemu/slirp/socket.c | 301 |
1 files changed, 238 insertions, 63 deletions
diff --git a/qemu/slirp/socket.c b/qemu/slirp/socket.c index 37ac5cf2f..a10eff18c 100644 --- a/qemu/slirp/socket.c +++ b/qemu/slirp/socket.c @@ -5,6 +5,7 @@ * terms and conditions of the copyright. */ +#include "qemu/osdep.h" #include "qemu-common.h" #include <slirp.h> #include "ip_icmp.h" @@ -15,24 +16,26 @@ static void sofcantrcvmore(struct socket *so); static void sofcantsendmore(struct socket *so); -struct socket * -solookup(struct socket *head, struct in_addr laddr, u_int lport, - struct in_addr faddr, u_int fport) +struct socket *solookup(struct socket **last, struct socket *head, + struct sockaddr_storage *lhost, struct sockaddr_storage *fhost) { - struct socket *so; - - for (so = head->so_next; so != head; so = so->so_next) { - if (so->so_lport == lport && - so->so_laddr.s_addr == laddr.s_addr && - so->so_faddr.s_addr == faddr.s_addr && - so->so_fport == fport) - break; - } - - if (so == head) - return (struct socket *)NULL; - return so; + struct socket *so = *last; + + /* Optimisation */ + if (so != head && sockaddr_equal(&(so->lhost.ss), lhost) + && (!fhost || sockaddr_equal(&so->fhost.ss, fhost))) { + return so; + } + + for (so = head->so_next; so != head; so = so->so_next) { + if (sockaddr_equal(&(so->lhost.ss), lhost) + && (!fhost || sockaddr_equal(&so->fhost.ss, fhost))) { + *last = so; + return so; + } + } + return (struct socket *)NULL; } /* @@ -91,7 +94,7 @@ size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np) int mss = so->so_tcpcb->t_maxseg; DEBUG_CALL("sopreprbuf"); - DEBUG_ARG("so = %lx", (long )so); + DEBUG_ARG("so = %p", so); if (len <= 0) return 0; @@ -155,7 +158,7 @@ soread(struct socket *so) struct iovec iov[2]; DEBUG_CALL("soread"); - DEBUG_ARG("so = %lx", (long )so); + DEBUG_ARG("so = %p", so); /* * No need to check if there's enough room to read. @@ -173,9 +176,24 @@ soread(struct socket *so) if (nn < 0 && (errno == EINTR || errno == EAGAIN)) return 0; else { + int err; + socklen_t slen = sizeof err; + + err = errno; + if (nn == 0) { + getsockopt(so->s, SOL_SOCKET, SO_ERROR, + &err, &slen); + } + DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno))); sofcantrcvmore(so); - tcp_sockclosed(sototcpcb(so)); + + if (err == ECONNRESET || err == ECONNREFUSED + || err == ENOTCONN || err == EPIPE) { + tcp_drop(sototcpcb(so), err); + } else { + tcp_sockclosed(sototcpcb(so)); + } return -1; } } @@ -215,7 +233,7 @@ int soreadbuf(struct socket *so, const char *buf, int size) struct iovec iov[2]; DEBUG_CALL("soreadbuf"); - DEBUG_ARG("so = %lx", (long )so); + DEBUG_ARG("so = %p", so); /* * No need to check if there's enough room to read. @@ -257,13 +275,14 @@ err: * so when OOB data arrives, we soread() it and everything * in the send buffer is sent as urgent data */ -void +int sorecvoob(struct socket *so) { struct tcpcb *tp = sototcpcb(so); + int ret; DEBUG_CALL("sorecvoob"); - DEBUG_ARG("so = %lx", (long)so); + DEBUG_ARG("so = %p", so); /* * We take a guess at how much urgent data has arrived. @@ -273,11 +292,15 @@ sorecvoob(struct socket *so) * urgent data, or the read() doesn't return all the * urgent data. */ - soread(so); - tp->snd_up = tp->snd_una + so->so_snd.sb_cc; - tp->t_force = 1; - tcp_output(tp); - tp->t_force = 0; + ret = soread(so); + if (ret > 0) { + tp->snd_up = tp->snd_una + so->so_snd.sb_cc; + tp->t_force = 1; + tcp_output(tp); + tp->t_force = 0; + } + + return ret; } /* @@ -293,7 +316,7 @@ sosendoob(struct socket *so) int n, len; DEBUG_CALL("sosendoob"); - DEBUG_ARG("so = %lx", (long)so); + DEBUG_ARG("so = %p", so); DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc); if (so->so_urgc > 2048) @@ -351,7 +374,7 @@ sowrite(struct socket *so) struct iovec iov[2]; DEBUG_CALL("sowrite"); - DEBUG_ARG("so = %lx", (long)so); + DEBUG_ARG("so = %p", so); if (so->so_urgc) { sosendoob(so); @@ -437,11 +460,12 @@ sowrite(struct socket *so) void sorecvfrom(struct socket *so) { - struct sockaddr_in addr; - socklen_t addrlen = sizeof(struct sockaddr_in); + struct sockaddr_storage addr; + struct sockaddr_storage saddr, daddr; + socklen_t addrlen = sizeof(struct sockaddr_storage); DEBUG_CALL("sorecvfrom"); - DEBUG_ARG("so = %lx", (long)so); + DEBUG_ARG("so = %p", so); if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */ char buff[256]; @@ -459,7 +483,7 @@ sorecvfrom(struct socket *so) DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n", errno,strerror(errno))); - icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); + icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno)); } else { icmp_reflect(so->so_m); so->so_m = NULL; /* Don't m_free() it again! */ @@ -479,7 +503,18 @@ sorecvfrom(struct socket *so) if (!m) { return; } - m->m_data += IF_MAXLINKHDR; + switch (so->so_ffamily) { + case AF_INET: + m->m_data += IF_MAXLINKHDR + sizeof(struct udpiphdr); + break; + case AF_INET6: + m->m_data += IF_MAXLINKHDR + sizeof(struct ip6) + + sizeof(struct udphdr); + break; + default: + g_assert_not_reached(); + break; + } /* * XXX Shouldn't FIONREAD packets destined for port 53, @@ -501,13 +536,37 @@ sorecvfrom(struct socket *so) DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n", m->m_len, errno,strerror(errno))); if(m->m_len<0) { - u_char code=ICMP_UNREACH_PORT; - - if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; - else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; - - DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code)); - icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); + /* Report error as ICMP */ + switch (so->so_lfamily) { + uint8_t code; + case AF_INET: + code = ICMP_UNREACH_PORT; + + if (errno == EHOSTUNREACH) { + code = ICMP_UNREACH_HOST; + } else if (errno == ENETUNREACH) { + code = ICMP_UNREACH_NET; + } + + DEBUG_MISC((dfd, " rx error, tx icmp ICMP_UNREACH:%i\n", code)); + icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno)); + break; + case AF_INET6: + code = ICMP6_UNREACH_PORT; + + if (errno == EHOSTUNREACH) { + code = ICMP6_UNREACH_ADDRESS; + } else if (errno == ENETUNREACH) { + code = ICMP6_UNREACH_NO_ROUTE; + } + + DEBUG_MISC((dfd, " rx error, tx icmp6 ICMP_UNREACH:%i\n", code)); + icmp6_send_error(so->so_m, ICMP6_UNREACH, code); + break; + default: + g_assert_not_reached(); + break; + } m_free(m); } else { /* @@ -525,9 +584,26 @@ sorecvfrom(struct socket *so) /* * If this packet was destined for CTL_ADDR, - * make it look like that's where it came from, done by udp_output + * make it look like that's where it came from */ - udp_output(so, m, &addr); + saddr = addr; + sotranslate_in(so, &saddr); + daddr = so->lhost.ss; + + switch (so->so_ffamily) { + case AF_INET: + udp_output(so, m, (struct sockaddr_in *) &saddr, + (struct sockaddr_in *) &daddr, + so->so_iptos); + break; + case AF_INET6: + udp6_output(so, m, (struct sockaddr_in6 *) &saddr, + (struct sockaddr_in6 *) &daddr); + break; + default: + g_assert_not_reached(); + break; + } } /* rx error */ } /* if ping packet */ } @@ -538,33 +614,20 @@ sorecvfrom(struct socket *so) int sosendto(struct socket *so, struct mbuf *m) { - Slirp *slirp = so->slirp; int ret; - struct sockaddr_in addr; + struct sockaddr_storage addr; DEBUG_CALL("sosendto"); - DEBUG_ARG("so = %lx", (long)so); - DEBUG_ARG("m = %lx", (long)m); - - addr.sin_family = AF_INET; - if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == - slirp->vnetwork_addr.s_addr) { - /* It's an alias */ - if (so->so_faddr.s_addr == slirp->vnameserver_addr.s_addr) { - if (get_dns_addr(&addr.sin_addr) < 0) - addr.sin_addr = loopback_addr; - } else { - addr.sin_addr = loopback_addr; - } - } else - addr.sin_addr = so->so_faddr; - addr.sin_port = so->so_fport; + DEBUG_ARG("so = %p", so); + DEBUG_ARG("m = %p", m); - DEBUG_MISC((dfd, " sendto()ing, addr.sin_port=%d, addr.sin_addr.s_addr=%.16s\n", ntohs(addr.sin_port), inet_ntoa(addr.sin_addr))); + addr = so->fhost.ss; + DEBUG_CALL(" sendto()ing)"); + sotranslate_out(so, &addr); /* Don't care what port we get */ ret = sendto(so->s, m->m_data, m->m_len, 0, - (struct sockaddr *)&addr, sizeof (struct sockaddr)); + (struct sockaddr *)&addr, sockaddr_size(&addr)); if (ret < 0) return -1; @@ -619,6 +682,7 @@ tcp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr, so->so_state &= SS_PERSISTENT_MASK; so->so_state |= (SS_FACCEPTCONN | flags); + so->so_lfamily = AF_INET; so->so_lport = lport; /* Kept in network format */ so->so_laddr.s_addr = laddr; /* Ditto */ @@ -645,6 +709,7 @@ tcp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr, qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int)); getsockname(s,(struct sockaddr *)&addr,&addrlen); + so->so_ffamily = AF_INET; so->so_fport = addr.sin_port; if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr) so->so_faddr = slirp->vhost_addr; @@ -718,3 +783,113 @@ sofwdrain(struct socket *so) else sofcantsendmore(so); } + +/* + * Translate addr in host addr when it is a virtual address + */ +void sotranslate_out(struct socket *so, struct sockaddr_storage *addr) +{ + Slirp *slirp = so->slirp; + struct sockaddr_in *sin = (struct sockaddr_in *)addr; + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; + + switch (addr->ss_family) { + case AF_INET: + if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == + slirp->vnetwork_addr.s_addr) { + /* It's an alias */ + if (so->so_faddr.s_addr == slirp->vnameserver_addr.s_addr) { + if (get_dns_addr(&sin->sin_addr) < 0) { + sin->sin_addr = loopback_addr; + } + } else { + sin->sin_addr = loopback_addr; + } + } + + DEBUG_MISC((dfd, " addr.sin_port=%d, " + "addr.sin_addr.s_addr=%.16s\n", + ntohs(sin->sin_port), inet_ntoa(sin->sin_addr))); + break; + + case AF_INET6: + if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6, + slirp->vprefix_len)) { + if (in6_equal(&so->so_faddr6, &slirp->vnameserver_addr6)) { + /*if (get_dns_addr(&addr) < 0) {*/ /* TODO */ + sin6->sin6_addr = in6addr_loopback; + /*}*/ + } else { + sin6->sin6_addr = in6addr_loopback; + } + } + break; + + default: + break; + } +} + +void sotranslate_in(struct socket *so, struct sockaddr_storage *addr) +{ + Slirp *slirp = so->slirp; + struct sockaddr_in *sin = (struct sockaddr_in *)addr; + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; + + switch (addr->ss_family) { + case AF_INET: + if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == + slirp->vnetwork_addr.s_addr) { + uint32_t inv_mask = ~slirp->vnetwork_mask.s_addr; + + if ((so->so_faddr.s_addr & inv_mask) == inv_mask) { + sin->sin_addr = slirp->vhost_addr; + } else if (sin->sin_addr.s_addr == loopback_addr.s_addr || + so->so_faddr.s_addr != slirp->vhost_addr.s_addr) { + sin->sin_addr = so->so_faddr; + } + } + break; + + case AF_INET6: + if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6, + slirp->vprefix_len)) { + if (in6_equal(&sin6->sin6_addr, &in6addr_loopback) + || !in6_equal(&so->so_faddr6, &slirp->vhost_addr6)) { + sin6->sin6_addr = so->so_faddr6; + } + } + break; + + default: + break; + } +} + +/* + * Translate connections from localhost to the real hostname + */ +void sotranslate_accept(struct socket *so) +{ + Slirp *slirp = so->slirp; + + switch (so->so_ffamily) { + case AF_INET: + if (so->so_faddr.s_addr == INADDR_ANY || + (so->so_faddr.s_addr & loopback_mask) == + (loopback_addr.s_addr & loopback_mask)) { + so->so_faddr = slirp->vhost_addr; + } + break; + + case AF_INET6: + if (in6_equal(&so->so_faddr6, &in6addr_any) || + in6_equal(&so->so_faddr6, &in6addr_loopback)) { + so->so_faddr6 = slirp->vhost_addr6; + } + break; + + default: + break; + } +} |