From d36f45e5b46723cf2d4147173e18c52d4143176d Mon Sep 17 00:00:00 2001 From: Sowmini Varadhan Date: Mon, 25 Dec 2017 14:43:04 -0800 Subject: [PATCH] selftests/net: fix bugs in address and port initialization Address/port initialization should work correctly regardless of the order in which command line arguments are supplied, E.g, cfg_port should be used to connect to the remote host even if it is processed after -D, src/dst address initialization should not require that [-4|-6] be specified before the -S or -D args, receiver should be able to bind to *. Achieve this by making sure that the address/port structures are initialized after all command line options are parsed. Store cfg_port in host-byte order, and use htons() to set up the sin_port/sin6_port before bind/connect, so that the network system calls get the correct values in network-byte order. Signed-off-by: Sowmini Varadhan Acked-by: Willem de Bruijn Signed-off-by: David S. Miller --- tools/testing/selftests/net/msg_zerocopy.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/net/msg_zerocopy.c b/tools/testing/selftests/net/msg_zerocopy.c index 3ab6ec403905..e11fe84de0fd 100644 --- a/tools/testing/selftests/net/msg_zerocopy.c +++ b/tools/testing/selftests/net/msg_zerocopy.c @@ -259,22 +259,28 @@ static int setup_ip6h(struct ipv6hdr *ip6h, uint16_t payload_len) return sizeof(*ip6h); } -static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr) + +static void setup_sockaddr(int domain, const char *str_addr, + struct sockaddr_storage *sockaddr) { struct sockaddr_in6 *addr6 = (void *) sockaddr; struct sockaddr_in *addr4 = (void *) sockaddr; switch (domain) { case PF_INET: + memset(addr4, 0, sizeof(*addr4)); addr4->sin_family = AF_INET; addr4->sin_port = htons(cfg_port); - if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1) + if (str_addr && + inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1) error(1, 0, "ipv4 parse error: %s", str_addr); break; case PF_INET6: + memset(addr6, 0, sizeof(*addr6)); addr6->sin6_family = AF_INET6; addr6->sin6_port = htons(cfg_port); - if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1) + if (str_addr && + inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1) error(1, 0, "ipv6 parse error: %s", str_addr); break; default: @@ -603,6 +609,7 @@ static void parse_opts(int argc, char **argv) sizeof(struct tcphdr) - 40 /* max tcp options */; int c; + char *daddr = NULL, *saddr = NULL; cfg_payload_len = max_payload_len; @@ -627,7 +634,7 @@ static void parse_opts(int argc, char **argv) cfg_cpu = strtol(optarg, NULL, 0); break; case 'D': - setup_sockaddr(cfg_family, optarg, &cfg_dst_addr); + daddr = optarg; break; case 'i': cfg_ifindex = if_nametoindex(optarg); @@ -638,7 +645,7 @@ static void parse_opts(int argc, char **argv) cfg_cork_mixed = true; break; case 'p': - cfg_port = htons(strtoul(optarg, NULL, 0)); + cfg_port = strtoul(optarg, NULL, 0); break; case 'r': cfg_rx = true; @@ -647,7 +654,7 @@ static void parse_opts(int argc, char **argv) cfg_payload_len = strtoul(optarg, NULL, 0); break; case 'S': - setup_sockaddr(cfg_family, optarg, &cfg_src_addr); + saddr = optarg; break; case 't': cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000; @@ -660,6 +667,8 @@ static void parse_opts(int argc, char **argv) break; } } + setup_sockaddr(cfg_family, daddr, &cfg_dst_addr); + setup_sockaddr(cfg_family, saddr, &cfg_src_addr); if (cfg_payload_len > max_payload_len) error(1, 0, "-s: payload exceeds max (%d)", max_payload_len); -- 2.30.2