diff options
Diffstat (limited to 'src/loopback-setup.c')
| -rw-r--r-- | src/loopback-setup.c | 46 |
1 files changed, 21 insertions, 25 deletions
diff --git a/src/loopback-setup.c b/src/loopback-setup.c index c852ed70f..a579060d8 100644 --- a/src/loopback-setup.c +++ b/src/loopback-setup.c @@ -33,14 +33,7 @@ #include "util.h" #include "macro.h" #include "loopback-setup.h" - -enum { - REQUEST_NONE = 0, - REQUEST_ADDRESS_IPV4 = 1, - REQUEST_ADDRESS_IPV6 = 2, - REQUEST_FLAGS = 4, - REQUEST_ALL = 7 -}; +#include "socket-util.h" #define NLMSG_TAIL(nmsg) \ ((struct rtattr *) (((uint8_t*) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) @@ -89,7 +82,7 @@ static ssize_t recvfrom_loop(int fd, void *buf, size_t buf_len, int flags, struc } } -static int add_adresses(int fd, int if_loopback) { +static int add_adresses(int fd, int if_loopback, unsigned *requests) { union { struct sockaddr sa; struct sockaddr_nl nl; @@ -110,7 +103,7 @@ static int add_adresses(int fd, int if_loopback) { request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); request.header.nlmsg_type = RTM_NEWADDR; request.header.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_ACK; - request.header.nlmsg_seq = REQUEST_ADDRESS_IPV4; + request.header.nlmsg_seq = *requests + 1; ifaddrmsg = NLMSG_DATA(&request.header); ifaddrmsg->ifa_family = AF_INET; @@ -127,9 +120,13 @@ static int add_adresses(int fd, int if_loopback) { if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0) return -errno; + (*requests)++; + + if (!socket_ipv6_is_supported()) + return 0; request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); - request.header.nlmsg_seq = REQUEST_ADDRESS_IPV6; + request.header.nlmsg_seq = *requests + 1; ifaddrmsg->ifa_family = AF_INET6; ifaddrmsg->ifa_prefixlen = 128; @@ -139,11 +136,12 @@ static int add_adresses(int fd, int if_loopback) { if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0) return -errno; + (*requests)++; return 0; } -static int start_interface(int fd, int if_loopback) { +static int start_interface(int fd, int if_loopback, unsigned *requests) { union { struct sockaddr sa; struct sockaddr_nl nl; @@ -161,7 +159,7 @@ static int start_interface(int fd, int if_loopback) { request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); request.header.nlmsg_type = RTM_NEWLINK; request.header.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK; - request.header.nlmsg_seq = REQUEST_FLAGS; + request.header.nlmsg_seq = *requests + 1; ifinfomsg = NLMSG_DATA(&request.header); ifinfomsg->ifi_family = AF_UNSPEC; @@ -175,10 +173,12 @@ static int start_interface(int fd, int if_loopback) { if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0) return -errno; + (*requests)++; + return 0; } -static int read_response(int fd) { +static int read_response(int fd, unsigned requests_max) { union { struct sockaddr sa; struct sockaddr_nl nl; @@ -208,7 +208,7 @@ static int read_response(int fd) { if (response.header.nlmsg_type != NLMSG_ERROR || (pid_t) response.header.nlmsg_pid != getpid() || - response.header.nlmsg_seq >= REQUEST_ALL) + response.header.nlmsg_seq >= requests_max) return 0; if ((size_t) l < NLMSG_LENGTH(sizeof(struct nlmsgerr)) || @@ -232,8 +232,7 @@ int loopback_setup(void) { struct sockaddr_nl nl; struct sockaddr_storage storage; } sa; - int requests = REQUEST_NONE; - + unsigned requests = 0, i; int fd; errno = 0; @@ -251,19 +250,16 @@ int loopback_setup(void) { goto finish; } - if ((r = add_adresses(fd, if_loopback)) < 0) + if ((r = add_adresses(fd, if_loopback, &requests)) < 0) goto finish; - if ((r = start_interface(fd, if_loopback)) < 0) + if ((r = start_interface(fd, if_loopback, &requests)) < 0) goto finish; - do { - if ((r = read_response(fd)) < 0) + for (i = 0; i < requests; i++) { + if ((r = read_response(fd, requests)) < 0) goto finish; - - requests |= r; - - } while (requests != REQUEST_ALL); + } r = 0; |