7 #include <netinet/in.h>
8 #include <sys/socket.h>
11 #include "psmb_priv.h"
14 static void dummy_log(void *log_priv, int priority, const char *format, ...) {}
16 psmb_ctx_t *psmb_new(void)
18 return psmb_new_mm(malloc, free, realloc);
21 psmb_ctx_t *psmb_new_mm(void *(*malloc)(size_t size),
22 void (*free)(void *ptr),
23 void *(*realloc)(void *ptr, size_t size))
25 psmb_ctx_t *ctx = (*malloc)(sizeof(psmb_ctx_t));
28 LOG(ctx, LOG_ERR, "failed to allocate psmb_ctx: %m");
34 .malloc = malloc, .free = free, .realloc = realloc,
36 .prefix = (struct in6_addr){{{ 0xff, 0x15, 'P', 'S',
38 0x00, 0x00, 0x00, 0x00,
39 0x00, 0x00, 0x00, 0x00 }}},
41 .pmtu = PSMB_DEFAULT_PMTU,
42 .port = PSMB_DEFAULT_PORT};
46 psmb_result_t psmb_set_logf(psmb_ctx_t *ctx,
47 void (*logf)(void *log_priv, int priority, const char *format, ...),
52 ctx->log_priv = log_priv;
53 return (psmb_result_t){PSMB_OK};
55 LOG(ctx, LOG_ERR, "psmb_set_...() used after psmb_open()");
57 return (psmb_result_t){PSMB_ERROR};
61 psmb_result_t psmb_set_pmtu(psmb_ctx_t *ctx, unsigned int pmtu)
65 return (psmb_result_t){PSMB_OK};
67 LOG(ctx, LOG_ERR, "psmb_set_...() used after psmb_open()");
69 return (psmb_result_t){PSMB_ERROR};
73 psmb_result_t psmb_set_port(psmb_ctx_t *ctx, unsigned short port)
77 return (psmb_result_t){PSMB_OK};
79 LOG(ctx, LOG_ERR, "psmb_set_...() used after psmb_open()");
81 return (psmb_result_t){PSMB_ERROR};
85 psmb_result_t psmb_set_mgrp(psmb_ctx_t *ctx, struct in6_addr prefix,
86 unsigned char prefixlen)
88 if (prefixlen > 128) {
89 LOG(ctx, LOG_ERR, "psmb_set_mgrp() prefixlen %d is too big",
92 return (psmb_result_t){PSMB_ERROR};
96 ctx->prefixlen = prefixlen;
97 return (psmb_result_t){PSMB_OK};
99 LOG(ctx, LOG_ERR, "psmb_set_...() used after psmb_open()");
101 return (psmb_result_t){PSMB_ERROR};
105 psmb_result_t psmb_open(psmb_ctx_t *ctx)
107 unsigned long on = 1;
108 struct sockaddr_in6 addr = (struct sockaddr_in6){
109 .sin6_family = AF_INET6,
110 .sin6_addr = in6addr_any,
111 .sin6_port = htons(ctx->port)
115 LOG(ctx, LOG_ERR, "redundant call to psmb_open()");
117 return (psmb_result_t){PSMB_ERROR};
119 ctx->fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
122 LOG(ctx, LOG_ERR, "socket: %m");
124 return (psmb_result_t){PSMB_ERROR};
126 if (setsockopt(ctx->fd, SOL_SOCKET, SO_REUSEADDR,
127 &on, sizeof(on)) < 0) {
129 LOG(ctx, LOG_ERR, "setsockopt(..., SO_REUSEADDR, ...): %m");
133 return (psmb_result_t){PSMB_ERROR};
135 if (setsockopt(ctx->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
136 &on, sizeof(on)) < 0) {
138 LOG(ctx, LOG_ERR, "setsockopt(..., IPV6_PKTINFO, ...): %m");
142 return (psmb_result_t){PSMB_ERROR};
144 if (bind(ctx->fd, (struct sockaddr *)&addr,
145 sizeof(struct sockaddr_in6)) == -1) {
147 LOG(ctx, LOG_ERR, "bind(): %m");
151 return (psmb_result_t){PSMB_ERROR};
153 return (psmb_result_t){PSMB_OK};
156 static struct in6_addr multiaddr(struct in6_addr prefix,
157 unsigned char prefixlen, uint64_t suffix)
159 struct in6_addr result = prefix;
160 unsigned char len = prefixlen > 64 ? prefixlen : 64;
161 uint64_t mask = len == 64 ? ~(uint64_t)0 : ((uint64_t)1 << len) - 1;
163 *(uint64_t *)(&result.__in6_u.__u6_addr32[2]) &= ~mask;
164 *(uint64_t *)(&result.__in6_u.__u6_addr32[2]) |= (suffix & mask);
168 static psmb_result_t psmb_sub_unsub(psmb_ctx_t *ctx, char *channel, int option)
170 struct ipv6_mreq mreq = { 0 };
171 char mgrp_str[INET6_ADDRSTRLEN+1];
174 LOG(ctx, LOG_ERR, "subscribe: psmb is not open");
176 return (psmb_result_t){PSMB_ERROR};
178 mreq.ipv6mr_multiaddr = multiaddr(ctx->prefix, ctx->prefixlen,
179 hash64(channel, strlen(channel)));
180 (void)inet_ntop(AF_INET6, &mreq.ipv6mr_multiaddr,
181 mgrp_str, sizeof(mgrp_str));
182 LOG(ctx, LOG_DEBUG, "using multiaddr %s for channel \"%s\"",
184 mreq.ipv6mr_interface = 0; /* how to use this??? */
185 if (setsockopt(ctx->fd, IPPROTO_IPV6, option,
186 (void *)&mreq, sizeof(mreq)) == -1) {
188 LOG(ctx, LOG_ERR, "add_membership(): %m");
190 return (psmb_result_t){PSMB_ERROR};
192 return (psmb_result_t){PSMB_OK};
195 psmb_result_t psmb_subscribe(psmb_ctx_t *ctx, char *channel) {
196 return psmb_sub_unsub(ctx, channel, IPV6_ADD_MEMBERSHIP);
199 psmb_result_t psmb_unsubscribe(psmb_ctx_t *ctx, char *channel) {
200 return psmb_sub_unsub(ctx, channel, IPV6_DROP_MEMBERSHIP);
203 bool psmb_success(psmb_result_t result)
205 return !(result.code & PSMB_ERROR);
208 bool psmb_message_waiting(psmb_result_t result)
210 return !!(result.code & PSMB_MESSAGE);
213 bool psmb_need_write_wait(psmb_result_t result)
215 return !!(result.code & PSMB_NEED_WRITE);
218 void psmb_destroy(psmb_ctx_t *ctx)
221 LOG(ctx, LOG_ERR, "psmb_ctx is not open");
223 if (close(ctx->fd) == -1)
224 LOG(ctx, LOG_ERR, "close(): %m");
226 /* clean up the rest */