treewide: Unchecked return value from library, CWE-252
All instances were harmless, but it might be useful to have some debug messages here and there. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio
parent
6a3f6df865
commit
22ed4467a4
8 changed files with 116 additions and 55 deletions
13
icmp.c
13
icmp.c
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@ -160,6 +160,9 @@ int icmp_tap_handler(const struct ctx *c, int af, const void *addr,
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if (!ih)
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return 1;
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if (ih->type != ICMP_ECHO && ih->type != ICMP_ECHOREPLY)
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return 1;
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sa.sin_port = ih->un.echo.id;
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iref.icmp.id = id = ntohs(ih->un.echo.id);
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@ -179,8 +182,9 @@ int icmp_tap_handler(const struct ctx *c, int af, const void *addr,
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bitmap_set(icmp_act[V4], id);
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sa.sin_addr = *(struct in_addr *)addr;
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sendto(s, ih, sizeof(*ih) + plen, MSG_NOSIGNAL,
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(struct sockaddr *)&sa, sizeof(sa));
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if (sendto(s, ih, sizeof(*ih) + plen, MSG_NOSIGNAL,
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(struct sockaddr *)&sa, sizeof(sa)) < 0)
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debug("ICMP: failed to relay request to socket");
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} else if (af == AF_INET6) {
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union icmp_epoll_ref iref = { .icmp.v6 = 1 };
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struct sockaddr_in6 sa = {
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@ -216,8 +220,9 @@ int icmp_tap_handler(const struct ctx *c, int af, const void *addr,
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bitmap_set(icmp_act[V6], id);
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sa.sin6_addr = *(struct in6_addr *)addr;
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sendto(s, ih, sizeof(*ih) + plen, MSG_NOSIGNAL,
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(struct sockaddr *)&sa, sizeof(sa));
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if (sendto(s, ih, sizeof(*ih) + plen, MSG_NOSIGNAL,
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(struct sockaddr *)&sa, sizeof(sa)) < 1)
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debug("ICMPv6: failed to relay request to socket");
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}
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return 1;
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40
netlink.c
40
netlink.c
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@ -60,7 +60,8 @@ ns:
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return 0;
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#ifdef NETLINK_GET_STRICT_CHK
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setsockopt(*s, SOL_NETLINK, NETLINK_GET_STRICT_CHK, &y, sizeof(y));
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if (setsockopt(*s, SOL_NETLINK, NETLINK_GET_STRICT_CHK, &y, sizeof(y)))
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debug("netlink: cannot set NETLINK_GET_STRICT_CHK on %i", *s);
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#endif
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ns_enter((struct ctx *)arg);
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@ -152,7 +153,8 @@ unsigned int nl_get_ext_if(int *v4, int *v6)
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char buf[BUFSIZ];
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long *word, tmp;
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uint8_t *vmap;
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size_t n, na;
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ssize_t n;
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size_t na;
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int *v;
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if (*v4 == IP_VERSION_PROBE) {
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@ -168,7 +170,9 @@ v6:
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return 0;
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}
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n = nl_req(0, buf, &req, sizeof(req));
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if ((n = nl_req(0, buf, &req, sizeof(req))) < 0)
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return 0;
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nh = (struct nlmsghdr *)buf;
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for ( ; NLMSG_OK(nh, n); nh = NLMSG_NEXT(nh, n)) {
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@ -289,7 +293,8 @@ void nl_route(int ns, unsigned int ifi, sa_family_t af, void *gw)
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struct rtattr *rta;
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struct rtmsg *rtm;
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char buf[BUFSIZ];
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size_t n, na;
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ssize_t n;
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size_t na;
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if (set) {
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if (af == AF_INET6) {
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@ -323,8 +328,7 @@ void nl_route(int ns, unsigned int ifi, sa_family_t af, void *gw)
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req.nlh.nlmsg_flags |= NLM_F_DUMP;
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}
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n = nl_req(ns, buf, &req, req.nlh.nlmsg_len);
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if (set)
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if (set || (n = nl_req(ns, buf, &req, req.nlh.nlmsg_len)) < 0)
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return;
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nh = (struct nlmsghdr *)buf;
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@ -398,7 +402,8 @@ void nl_addr(int ns, unsigned int ifi, sa_family_t af,
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struct nlmsghdr *nh;
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struct rtattr *rta;
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char buf[BUFSIZ];
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size_t n, na;
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ssize_t n;
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size_t na;
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if (set) {
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if (af == AF_INET6) {
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@ -430,8 +435,7 @@ void nl_addr(int ns, unsigned int ifi, sa_family_t af,
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req.nlh.nlmsg_flags |= NLM_F_DUMP;
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}
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n = nl_req(ns, buf, &req, req.nlh.nlmsg_len);
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if (set)
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if (set || (n = nl_req(ns, buf, &req, req.nlh.nlmsg_len)) < 0)
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return;
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nh = (struct nlmsghdr *)buf;
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@ -504,14 +508,17 @@ void nl_link(int ns, unsigned int ifi, void *mac, int up, int mtu)
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struct nlmsghdr *nh;
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struct rtattr *rta;
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char buf[BUFSIZ];
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size_t n, na;
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ssize_t n;
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size_t na;
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if (!MAC_IS_ZERO(mac)) {
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req.nlh.nlmsg_len = sizeof(req);
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memcpy(req.set.mac, mac, ETH_ALEN);
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req.rta.rta_type = IFLA_ADDRESS;
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req.rta.rta_len = RTA_LENGTH(ETH_ALEN);
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nl_req(ns, buf, &req, req.nlh.nlmsg_len);
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if (nl_req(ns, buf, &req, req.nlh.nlmsg_len) < 0)
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return;
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up = 0;
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}
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@ -520,17 +527,20 @@ void nl_link(int ns, unsigned int ifi, void *mac, int up, int mtu)
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req.set.mtu.mtu = mtu;
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req.rta.rta_type = IFLA_MTU;
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req.rta.rta_len = RTA_LENGTH(sizeof(unsigned int));
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nl_req(ns, buf, &req, req.nlh.nlmsg_len);
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if (nl_req(ns, buf, &req, req.nlh.nlmsg_len) < 0)
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return;
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up = 0;
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}
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if (up)
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nl_req(ns, buf, &req, req.nlh.nlmsg_len);
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if (up && nl_req(ns, buf, &req, req.nlh.nlmsg_len) < 0)
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return;
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if (change)
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return;
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n = nl_req(ns, buf, &req, req.nlh.nlmsg_len);
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if ((n = nl_req(ns, buf, &req, req.nlh.nlmsg_len)) < 0)
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return;
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nh = (struct nlmsghdr *)buf;
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for ( ; NLMSG_OK(nh, n); nh = NLMSG_NEXT(nh, n)) {
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13
qrap.c
13
qrap.c
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@ -234,8 +234,10 @@ int main(int argc, char **argv)
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valid_args:
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for (i = 1; i < UNIX_SOCK_MAX; i++) {
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s = socket(AF_UNIX, SOCK_STREAM, 0);
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setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
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if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
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perror("setsockopt SO_RCVTIMEO");
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if (setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)))
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perror("setsockopt SO_SNDTIMEO");
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if (s < 0) {
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perror("socket");
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@ -263,8 +265,11 @@ valid_args:
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}
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tv.tv_usec = 0;
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setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
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if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
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perror("setsockopt, SO_RCVTIMEO reset");
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if (setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)))
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perror("setsockopt, SO_SNDTIMEO reset");
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fprintf(stderr, "Connected to %s\n", addr.sun_path);
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if (dup2(s, (int)fd) < 0) {
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19
tap.c
19
tap.c
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@ -84,7 +84,8 @@ int tap_send(const struct ctx *c, const void *data, size_t len, int vnet_pre)
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} else {
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uint32_t vnet_len = htonl(len);
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send(c->fd_tap, &vnet_len, 4, flags);
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if (send(c->fd_tap, &vnet_len, 4, flags) < 0)
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return -1;
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}
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return send(c->fd_tap, data, len, flags);
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@ -150,7 +151,8 @@ void tap_ip_send(const struct ctx *c, const struct in6_addr *src, uint8_t proto,
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ih->checksum = csum_unaligned(ih, len, 0);
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}
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tap_send(c, buf, len + sizeof(*iph) + sizeof(*eh), 1);
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if (tap_send(c, buf, len + sizeof(*iph) + sizeof(*eh), 1) < 0)
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debug("tap: failed to send %lu bytes (IPv4)", len);
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} else {
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struct ipv6hdr *ip6h = (struct ipv6hdr *)(eh + 1);
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char *data = (char *)(ip6h + 1);
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@ -201,7 +203,8 @@ void tap_ip_send(const struct ctx *c, const struct in6_addr *src, uint8_t proto,
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ip6h->flow_lbl[2] = (flow >> 0) & 0xff;
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}
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tap_send(c, buf, len + sizeof(*ip6h) + sizeof(*eh), 1);
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if (tap_send(c, buf, len + sizeof(*ip6h) + sizeof(*eh), 1) < 1)
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debug("tap: failed to send %lu bytes (IPv6)", len);
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}
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}
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@ -862,11 +865,13 @@ static void tap_sock_unix_new(struct ctx *c)
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c->fd_tap = accept4(c->fd_tap_listen, NULL, NULL, 0);
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if (!c->low_rmem)
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setsockopt(c->fd_tap, SOL_SOCKET, SO_RCVBUF, &v, sizeof(v));
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if (!c->low_rmem &&
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setsockopt(c->fd_tap, SOL_SOCKET, SO_RCVBUF, &v, sizeof(v)))
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trace("tap: failed to set SO_RCVBUF to %i", v);
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if (!c->low_wmem)
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setsockopt(c->fd_tap, SOL_SOCKET, SO_SNDBUF, &v, sizeof(v));
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if (!c->low_wmem &&
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setsockopt(c->fd_tap, SOL_SOCKET, SO_SNDBUF, &v, sizeof(v)))
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trace("tap: failed to set SO_SNDBUF to %i", v);
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ev.data.fd = c->fd_tap;
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ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
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19
tcp.c
19
tcp.c
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@ -1053,11 +1053,11 @@ void tcp_sock_set_bufsize(const struct ctx *c, int s)
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if (s == -1)
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return;
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if (!c->low_rmem)
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setsockopt(s, SOL_SOCKET, SO_RCVBUF, &v, sizeof(v));
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if (!c->low_rmem && setsockopt(s, SOL_SOCKET, SO_RCVBUF, &v, sizeof(v)))
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trace("TCP: failed to set SO_RCVBUF to %i", v);
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if (!c->low_wmem)
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setsockopt(s, SOL_SOCKET, SO_SNDBUF, &v, sizeof(v));
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if (!c->low_wmem && setsockopt(s, SOL_SOCKET, SO_SNDBUF, &v, sizeof(v)))
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trace("TCP: failed to set SO_SNDBUF to %i", v);
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}
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/**
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@ -1547,7 +1547,8 @@ static void tcp_l2_buf_flush_part(const struct ctx *c,
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missing = end - sent;
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p = (char *)iov->iov_base + iov->iov_len - missing;
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send(c->fd_tap, p, missing, MSG_NOSIGNAL);
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if (send(c->fd_tap, p, missing, MSG_NOSIGNAL))
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debug("TCP: failed to flush %lu missing bytes to tap", missing);
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}
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/**
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@ -2010,6 +2011,7 @@ static void tcp_clamp_window(const struct ctx *c, struct tcp_conn *conn,
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unsigned wnd)
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{
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uint32_t prev_scaled = conn->wnd_from_tap << conn->ws_from_tap;
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int s = conn->sock;
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wnd <<= conn->ws_from_tap;
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wnd = MIN(MAX_WINDOW, wnd);
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@ -2025,7 +2027,9 @@ static void tcp_clamp_window(const struct ctx *c, struct tcp_conn *conn,
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}
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conn->wnd_from_tap = MIN(wnd >> conn->ws_from_tap, USHRT_MAX);
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setsockopt(conn->sock, SOL_TCP, TCP_WINDOW_CLAMP, &wnd, sizeof(wnd));
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if (setsockopt(s, SOL_TCP, TCP_WINDOW_CLAMP, &wnd, sizeof(wnd)))
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trace("TCP: failed to set TCP_WINDOW_CLAMP on socket %i", s);
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conn_flag(c, conn, WND_CLAMPED);
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}
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@ -2209,7 +2213,8 @@ static void tcp_conn_from_tap(struct ctx *c, int af, const void *addr,
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conn->wnd_to_tap = WINDOW_DEFAULT;
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mss = tcp_conn_tap_mss(c, conn, opts, optlen);
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setsockopt(s, SOL_TCP, TCP_MAXSEG, &mss, sizeof(mss));
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if (setsockopt(s, SOL_TCP, TCP_MAXSEG, &mss, sizeof(mss)))
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trace("TCP: failed to set TCP_MAXSEG on socket %i", s);
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MSS_SET(conn, mss);
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tcp_get_tap_ws(conn, opts, optlen);
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49
tcp_splice.c
49
tcp_splice.c
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@ -376,8 +376,15 @@ static int tcp_splice_connect_finish(const struct ctx *c,
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return -EIO;
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}
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fcntl(conn->pipe_a_b[0], F_SETPIPE_SZ, c->tcp.pipe_size);
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fcntl(conn->pipe_b_a[0], F_SETPIPE_SZ, c->tcp.pipe_size);
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if (fcntl(conn->pipe_a_b[0], F_SETPIPE_SZ, c->tcp.pipe_size)) {
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trace("TCP (spliced): cannot set a->b pipe size to %lu",
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c->tcp.pipe_size);
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}
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if (fcntl(conn->pipe_b_a[0], F_SETPIPE_SZ, c->tcp.pipe_size)) {
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trace("TCP (spliced): cannot set b->a pipe size to %lu",
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c->tcp.pipe_size);
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}
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}
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if (!(conn->events & ESTABLISHED))
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@ -428,7 +435,11 @@ static int tcp_splice_connect(const struct ctx *c, struct tcp_splice_conn *conn,
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if (s < 0)
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tcp_sock_set_bufsize(c, conn->b);
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setsockopt(conn->b, SOL_TCP, TCP_QUICKACK, &((int){ 1 }), sizeof(int));
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if (setsockopt(conn->b, SOL_TCP, TCP_QUICKACK,
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&((int){ 1 }), sizeof(int))) {
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trace("TCP (spliced): failed to set TCP_QUICKACK on socket %i",
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conn->b);
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}
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if (CONN_V6(conn)) {
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sa = (struct sockaddr *)&addr6;
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@ -565,8 +576,11 @@ void tcp_sock_handler_splice(struct ctx *c, union epoll_ref ref,
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if ((s = accept4(ref.r.s, NULL, NULL, SOCK_NONBLOCK)) < 0)
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return;
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setsockopt(s, SOL_TCP, TCP_QUICKACK, &((int){ 1 }),
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sizeof(int));
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if (setsockopt(s, SOL_TCP, TCP_QUICKACK, &((int){ 1 }),
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sizeof(int))) {
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trace("TCP (spliced): failed to set TCP_QUICKACK on %i",
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s);
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}
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conn = CONN(c->tcp.splice_conn_count++);
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conn->a = s;
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@ -817,12 +831,19 @@ static void tcp_splice_pipe_refill(const struct ctx *c)
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continue;
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}
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fcntl(splice_pipe_pool[i][0][0], F_SETPIPE_SZ,
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if (fcntl(splice_pipe_pool[i][0][0], F_SETPIPE_SZ,
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c->tcp.pipe_size)) {
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trace("TCP (spliced): cannot set a->b pipe size to %lu",
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c->tcp.pipe_size);
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fcntl(splice_pipe_pool[i][1][0], F_SETPIPE_SZ,
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}
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if (fcntl(splice_pipe_pool[i][1][0], F_SETPIPE_SZ,
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c->tcp.pipe_size)) {
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trace("TCP (spliced): cannot set b->a pipe size to %lu",
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c->tcp.pipe_size);
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}
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}
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}
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/**
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* tcp_splice_init() - Initialise pipe pool and size
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@ -850,15 +871,21 @@ void tcp_splice_timer(struct ctx *c)
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if ( (conn->flags & RCVLOWAT_SET_A) &&
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!(conn->flags & RCVLOWAT_ACT_A)) {
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setsockopt(conn->a, SOL_SOCKET, SO_RCVLOWAT,
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&((int){ 1 }), sizeof(int));
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if (setsockopt(conn->a, SOL_SOCKET, SO_RCVLOWAT,
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&((int){ 1 }), sizeof(int))) {
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trace("TCP (spliced): can't set SO_RCVLOWAT on "
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"%i", conn->a);
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}
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conn_flag(c, conn, ~RCVLOWAT_SET_A);
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}
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if ( (conn->flags & RCVLOWAT_SET_B) &&
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!(conn->flags & RCVLOWAT_ACT_B)) {
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setsockopt(conn->b, SOL_SOCKET, SO_RCVLOWAT,
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&((int){ 1 }), sizeof(int));
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if (setsockopt(conn->b, SOL_SOCKET, SO_RCVLOWAT,
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&((int){ 1 }), sizeof(int))) {
|
||||
trace("TCP (spliced): can't set SO_RCVLOWAT on "
|
||||
"%i", conn->b);
|
||||
}
|
||||
conn_flag(c, conn, ~RCVLOWAT_SET_B);
|
||||
}
|
||||
|
||||
|
|
|
|||
3
udp.c
3
udp.c
|
|
@ -938,7 +938,8 @@ void udp_sock_handler(const struct ctx *c, union epoll_ref ref, uint32_t events,
|
|||
|
||||
last_mh->msg_iov = &last_mh->msg_iov[i];
|
||||
|
||||
sendmsg(c->fd_tap, last_mh, MSG_NOSIGNAL);
|
||||
if (sendmsg(c->fd_tap, last_mh, MSG_NOSIGNAL) < 0)
|
||||
debug("UDP: %li bytes to tap missing", missing);
|
||||
|
||||
*iov_base -= first_offset;
|
||||
break;
|
||||
|
|
|
|||
11
util.c
11
util.c
|
|
@ -154,7 +154,8 @@ void passt_vsyslog(int pri, const char *format, va_list ap)
|
|||
if (log_opt & LOG_PERROR)
|
||||
fprintf(stderr, "%s", buf + sizeof("<0>"));
|
||||
|
||||
send(log_sock, buf, n, 0);
|
||||
if (send(log_sock, buf, n, 0) != n)
|
||||
fprintf(stderr, "Failed to send %i bytes to syslog\n", n);
|
||||
}
|
||||
|
||||
#define IPV6_NH_OPT(nh) \
|
||||
|
|
@ -239,7 +240,7 @@ int sock_l4(const struct ctx *c, int af, uint8_t proto, uint16_t port,
|
|||
};
|
||||
const struct sockaddr *sa;
|
||||
struct epoll_event ev;
|
||||
int fd, sl, one = 1;
|
||||
int fd, sl, y = 1;
|
||||
|
||||
if (proto != IPPROTO_TCP && proto != IPPROTO_UDP &&
|
||||
proto != IPPROTO_ICMP && proto != IPPROTO_ICMPV6)
|
||||
|
|
@ -287,10 +288,12 @@ int sock_l4(const struct ctx *c, int af, uint8_t proto, uint16_t port,
|
|||
sa = (const struct sockaddr *)&addr6;
|
||||
sl = sizeof(addr6);
|
||||
|
||||
setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
|
||||
if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &y, sizeof(y)))
|
||||
debug("Failed to set IPV6_V6ONLY on socket %i", fd);
|
||||
}
|
||||
|
||||
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
|
||||
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &y, sizeof(y)))
|
||||
debug("Failed to set IPV6_V6ONLY on socket %i", fd);
|
||||
|
||||
if (bind(fd, sa, sl) < 0) {
|
||||
/* We'll fail to bind to low ports if we don't have enough
|
||||
|
|
|
|||
Loading…
Reference in a new issue