Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 1 | #include "../config.h" |
| 2 | |
Harald Welte | e476442 | 2011-05-22 12:25:57 +0200 | [diff] [blame] | 3 | #ifdef HAVE_SYS_SOCKET_H |
| 4 | |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 5 | #include <osmocom/core/logging.h> |
| 6 | #include <osmocom/core/select.h> |
| 7 | #include <osmocom/core/socket.h> |
| 8 | |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 9 | #include <sys/socket.h> |
| 10 | #include <sys/types.h> |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 11 | |
| 12 | #include <stdio.h> |
| 13 | #include <unistd.h> |
| 14 | #include <stdint.h> |
| 15 | #include <string.h> |
| 16 | #include <errno.h> |
| 17 | #include <netdb.h> |
| 18 | #include <ifaddrs.h> |
| 19 | |
| 20 | int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto, |
| 21 | const char *host, uint16_t port, int connect0_bind1) |
| 22 | { |
| 23 | struct addrinfo hints, *result, *rp; |
Harald Welte | 68b1574 | 2011-05-22 21:47:29 +0200 | [diff] [blame] | 24 | int sfd, rc, on = 1; |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 25 | char portbuf[16]; |
| 26 | |
| 27 | sprintf(portbuf, "%u", port); |
| 28 | memset(&hints, 0, sizeof(struct addrinfo)); |
| 29 | hints.ai_family = family; |
| 30 | hints.ai_socktype = type; |
| 31 | hints.ai_flags = 0; |
| 32 | hints.ai_protocol = proto; |
| 33 | |
Harald Welte | f9e0746 | 2011-05-31 17:47:54 +0200 | [diff] [blame^] | 34 | if (connect0_bind1) |
| 35 | hints.ai_flags |= AI_PASSIVE; |
| 36 | |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 37 | rc = getaddrinfo(host, portbuf, &hints, &result); |
| 38 | if (rc != 0) { |
| 39 | perror("getaddrinfo returned NULL"); |
| 40 | return -EINVAL; |
| 41 | } |
| 42 | |
| 43 | for (rp = result; rp != NULL; rp = rp->ai_next) { |
| 44 | sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol); |
| 45 | if (sfd == -1) |
| 46 | continue; |
| 47 | if (connect0_bind1 == 0) { |
| 48 | if (connect(sfd, rp->ai_addr, rp->ai_addrlen) != -1) |
| 49 | break; |
| 50 | } else { |
| 51 | if (bind(sfd, rp->ai_addr, rp->ai_addrlen) != -1) |
| 52 | break; |
| 53 | } |
| 54 | close(sfd); |
| 55 | } |
| 56 | freeaddrinfo(result); |
| 57 | |
| 58 | if (rp == NULL) { |
| 59 | perror("unable to connect/bind socket"); |
| 60 | return -ENODEV; |
| 61 | } |
Harald Welte | 68b1574 | 2011-05-22 21:47:29 +0200 | [diff] [blame] | 62 | |
| 63 | setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 64 | |
| 65 | /* Make sure to call 'listen' on a bound, connection-oriented sock */ |
| 66 | if (connect0_bind1 == 1) { |
| 67 | switch (type) { |
| 68 | case SOCK_STREAM: |
| 69 | case SOCK_SEQPACKET: |
| 70 | listen(sfd, 10); |
| 71 | break; |
| 72 | } |
| 73 | } |
| 74 | return sfd; |
| 75 | } |
| 76 | |
| 77 | int osmo_sock_init_ofd(struct osmo_fd *ofd, int family, int type, int proto, |
| 78 | const char *host, uint16_t port, int connect0_bind1) |
| 79 | { |
| 80 | int sfd, rc; |
| 81 | |
| 82 | sfd = osmo_sock_init(family, type, proto, host, port, connect0_bind1); |
| 83 | if (sfd < 0) |
| 84 | return sfd; |
| 85 | |
| 86 | ofd->fd = sfd; |
| 87 | ofd->when = BSC_FD_READ; |
| 88 | |
| 89 | rc = osmo_fd_register(ofd); |
| 90 | if (rc < 0) { |
| 91 | close(sfd); |
| 92 | return rc; |
| 93 | } |
| 94 | |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 95 | return sfd; |
| 96 | } |
| 97 | |
| 98 | int osmo_sock_init_sa(struct sockaddr *ss, uint16_t type, |
| 99 | uint8_t proto, int connect0_bind1) |
| 100 | { |
| 101 | char host[NI_MAXHOST]; |
| 102 | uint16_t port; |
| 103 | struct sockaddr_in *sin; |
| 104 | struct sockaddr_in6 *sin6; |
| 105 | int s, sa_len; |
| 106 | |
| 107 | /* determine port and host from ss */ |
| 108 | switch (ss->sa_family) { |
| 109 | case AF_INET: |
| 110 | sin = (struct sockaddr_in *) ss; |
| 111 | sa_len = sizeof(struct sockaddr_in); |
| 112 | port = ntohs(sin->sin_port); |
| 113 | break; |
| 114 | case AF_INET6: |
| 115 | sin6 = (struct sockaddr_in6 *) ss; |
| 116 | sa_len = sizeof(struct sockaddr_in6); |
| 117 | port = ntohs(sin6->sin6_port); |
| 118 | break; |
| 119 | default: |
| 120 | return -EINVAL; |
| 121 | } |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 122 | |
| 123 | s = getnameinfo(ss, sa_len, host, NI_MAXHOST, |
| 124 | NULL, 0, NI_NUMERICHOST); |
| 125 | if (s != 0) { |
| 126 | perror("getnameinfo failed"); |
| 127 | return s; |
| 128 | } |
| 129 | |
| 130 | return osmo_sock_init(ss->sa_family, type, proto, host, |
| 131 | port, connect0_bind1); |
| 132 | } |
| 133 | |
| 134 | static int sockaddr_equal(const struct sockaddr *a, |
Harald Welte | e476442 | 2011-05-22 12:25:57 +0200 | [diff] [blame] | 135 | const struct sockaddr *b, unsigned int len) |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 136 | { |
| 137 | struct sockaddr_in *sin_a, *sin_b; |
| 138 | struct sockaddr_in6 *sin6_a, *sin6_b; |
| 139 | |
| 140 | if (a->sa_family != b->sa_family) |
| 141 | return 0; |
| 142 | |
| 143 | switch (a->sa_family) { |
| 144 | case AF_INET: |
| 145 | sin_a = (struct sockaddr_in *)a; |
| 146 | sin_b = (struct sockaddr_in *)b; |
| 147 | if (!memcmp(&sin_a->sin_addr, &sin_b->sin_addr, |
| 148 | sizeof(struct in_addr))) |
| 149 | return 1; |
| 150 | break; |
| 151 | case AF_INET6: |
| 152 | sin6_a = (struct sockaddr_in6 *)a; |
| 153 | sin6_b = (struct sockaddr_in6 *)b; |
| 154 | if (!memcmp(&sin6_a->sin6_addr, &sin6_b->sin6_addr, |
| 155 | sizeof(struct in6_addr))) |
| 156 | return 1; |
| 157 | break; |
| 158 | } |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | /* determine if the given address is a local address */ |
| 163 | int osmo_sockaddr_is_local(struct sockaddr *addr, socklen_t addrlen) |
| 164 | { |
| 165 | struct ifaddrs *ifaddr, *ifa; |
| 166 | |
| 167 | if (getifaddrs(&ifaddr) == -1) { |
| 168 | perror("getifaddrs"); |
| 169 | return -EIO; |
| 170 | } |
| 171 | |
| 172 | for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { |
Harald Welte | 4d3a7b1 | 2011-05-24 21:31:53 +0200 | [diff] [blame] | 173 | if (!ifa->ifa_addr) |
| 174 | continue; |
Harald Welte | 33cb71a | 2011-05-21 18:54:32 +0200 | [diff] [blame] | 175 | if (sockaddr_equal(ifa->ifa_addr, addr, addrlen)) |
| 176 | return 1; |
| 177 | } |
| 178 | |
| 179 | return 0; |
| 180 | } |
Harald Welte | e476442 | 2011-05-22 12:25:57 +0200 | [diff] [blame] | 181 | |
| 182 | #endif /* HAVE_SYS_SOCKET_H */ |