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e19f9759 | 1 | /* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
18 | #include "main.h" | |
19 | #include "gateway_common.h" | |
20 | #include "gateway_client.h" | |
21 | ||
414254e3 ML |
22 | /** |
23 | * batadv_parse_gw_bandwidth - parse supplied string buffer to extract download | |
24 | * and upload bandwidth information | |
25 | * @net_dev: the soft interface net device | |
26 | * @buff: string buffer to parse | |
27 | * @down: pointer holding the returned download bandwidth information | |
28 | * @up: pointer holding the returned upload bandwidth information | |
29 | * | |
30 | * Returns false on parse error and true otherwise. | |
31 | */ | |
8e714a5d | 32 | static bool batadv_parse_gw_bandwidth(struct net_device *net_dev, char *buff, |
414254e3 | 33 | uint32_t *down, uint32_t *up) |
c6c8fea2 | 34 | { |
414254e3 | 35 | enum batadv_bandwidth_units bw_unit_type = BATADV_BW_UNIT_KBIT; |
c6c8fea2 | 36 | char *slash_ptr, *tmp_ptr; |
37a4065e | 37 | long ldown, lup; |
414254e3 | 38 | int ret; |
c6c8fea2 SE |
39 | |
40 | slash_ptr = strchr(buff, '/'); | |
41 | if (slash_ptr) | |
42 | *slash_ptr = 0; | |
43 | ||
44 | if (strlen(buff) > 4) { | |
45 | tmp_ptr = buff + strlen(buff) - 4; | |
46 | ||
47 | if (strnicmp(tmp_ptr, "mbit", 4) == 0) | |
414254e3 | 48 | bw_unit_type = BATADV_BW_UNIT_MBIT; |
c6c8fea2 SE |
49 | |
50 | if ((strnicmp(tmp_ptr, "kbit", 4) == 0) || | |
414254e3 | 51 | (bw_unit_type == BATADV_BW_UNIT_MBIT)) |
c6c8fea2 SE |
52 | *tmp_ptr = '\0'; |
53 | } | |
54 | ||
25a92b13 | 55 | ret = kstrtol(buff, 10, &ldown); |
c6c8fea2 | 56 | if (ret) { |
3e34819e SE |
57 | batadv_err(net_dev, |
58 | "Download speed of gateway mode invalid: %s\n", | |
59 | buff); | |
c6c8fea2 SE |
60 | return false; |
61 | } | |
62 | ||
414254e3 ML |
63 | switch (bw_unit_type) { |
64 | case BATADV_BW_UNIT_MBIT: | |
65 | *down = ldown * 10; | |
66 | break; | |
67 | case BATADV_BW_UNIT_KBIT: | |
68 | default: | |
69 | *down = ldown / 100; | |
70 | break; | |
71 | } | |
c6c8fea2 SE |
72 | |
73 | /* we also got some upload info */ | |
74 | if (slash_ptr) { | |
414254e3 | 75 | bw_unit_type = BATADV_BW_UNIT_KBIT; |
c6c8fea2 SE |
76 | |
77 | if (strlen(slash_ptr + 1) > 4) { | |
78 | tmp_ptr = slash_ptr + 1 - 4 + strlen(slash_ptr + 1); | |
79 | ||
80 | if (strnicmp(tmp_ptr, "mbit", 4) == 0) | |
414254e3 | 81 | bw_unit_type = BATADV_BW_UNIT_MBIT; |
c6c8fea2 SE |
82 | |
83 | if ((strnicmp(tmp_ptr, "kbit", 4) == 0) || | |
414254e3 | 84 | (bw_unit_type == BATADV_BW_UNIT_MBIT)) |
c6c8fea2 SE |
85 | *tmp_ptr = '\0'; |
86 | } | |
87 | ||
25a92b13 | 88 | ret = kstrtol(slash_ptr + 1, 10, &lup); |
c6c8fea2 | 89 | if (ret) { |
3e34819e SE |
90 | batadv_err(net_dev, |
91 | "Upload speed of gateway mode invalid: %s\n", | |
92 | slash_ptr + 1); | |
c6c8fea2 SE |
93 | return false; |
94 | } | |
95 | ||
414254e3 ML |
96 | switch (bw_unit_type) { |
97 | case BATADV_BW_UNIT_MBIT: | |
98 | *up = lup * 10; | |
99 | break; | |
100 | case BATADV_BW_UNIT_KBIT: | |
101 | default: | |
102 | *up = lup / 100; | |
103 | break; | |
104 | } | |
c6c8fea2 SE |
105 | } |
106 | ||
107 | return true; | |
108 | } | |
109 | ||
414254e3 ML |
110 | /** |
111 | * batadv_gw_tvlv_container_update - update the gw tvlv container after gateway | |
112 | * setting change | |
113 | * @bat_priv: the bat priv with all the soft interface information | |
114 | */ | |
115 | void batadv_gw_tvlv_container_update(struct batadv_priv *bat_priv) | |
116 | { | |
117 | struct batadv_tvlv_gateway_data gw; | |
118 | uint32_t down, up; | |
119 | char gw_mode; | |
120 | ||
121 | gw_mode = atomic_read(&bat_priv->gw_mode); | |
122 | ||
123 | switch (gw_mode) { | |
124 | case BATADV_GW_MODE_OFF: | |
125 | case BATADV_GW_MODE_CLIENT: | |
126 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_GW, 1); | |
127 | break; | |
128 | case BATADV_GW_MODE_SERVER: | |
129 | down = atomic_read(&bat_priv->gw.bandwidth_down); | |
130 | up = atomic_read(&bat_priv->gw.bandwidth_up); | |
131 | gw.bandwidth_down = htonl(down); | |
132 | gw.bandwidth_up = htonl(up); | |
133 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_GW, 1, | |
134 | &gw, sizeof(gw)); | |
135 | break; | |
136 | } | |
137 | } | |
138 | ||
84d5e5e0 SE |
139 | ssize_t batadv_gw_bandwidth_set(struct net_device *net_dev, char *buff, |
140 | size_t count) | |
c6c8fea2 | 141 | { |
56303d34 | 142 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
414254e3 | 143 | uint32_t down_curr, up_curr, down_new = 0, up_new = 0; |
c6c8fea2 SE |
144 | bool ret; |
145 | ||
414254e3 ML |
146 | down_curr = (unsigned int)atomic_read(&bat_priv->gw.bandwidth_down); |
147 | up_curr = (unsigned int)atomic_read(&bat_priv->gw.bandwidth_up); | |
148 | ||
149 | ret = batadv_parse_gw_bandwidth(net_dev, buff, &down_new, &up_new); | |
c6c8fea2 SE |
150 | if (!ret) |
151 | goto end; | |
152 | ||
414254e3 ML |
153 | if (!down_new) |
154 | down_new = 1; | |
c6c8fea2 | 155 | |
414254e3 ML |
156 | if (!up_new) |
157 | up_new = down_new / 5; | |
c6c8fea2 | 158 | |
414254e3 ML |
159 | if (!up_new) |
160 | up_new = 1; | |
c6c8fea2 | 161 | |
414254e3 | 162 | if ((down_curr == down_new) && (up_curr == up_new)) |
dafe94b2 ML |
163 | return count; |
164 | ||
4e820e72 | 165 | batadv_gw_reselect(bat_priv); |
3e34819e | 166 | batadv_info(net_dev, |
414254e3 ML |
167 | "Changing gateway bandwidth from: '%u.%u/%u.%u MBit' to: '%u.%u/%u.%u MBit'\n", |
168 | down_curr / 10, down_curr % 10, up_curr / 10, up_curr % 10, | |
169 | down_new / 10, down_new % 10, up_new / 10, up_new % 10); | |
c6c8fea2 | 170 | |
414254e3 ML |
171 | atomic_set(&bat_priv->gw.bandwidth_down, down_new); |
172 | atomic_set(&bat_priv->gw.bandwidth_up, up_new); | |
173 | batadv_gw_tvlv_container_update(bat_priv); | |
c6c8fea2 SE |
174 | |
175 | end: | |
176 | return count; | |
177 | } | |
414254e3 ML |
178 | |
179 | /** | |
180 | * batadv_gw_tvlv_ogm_handler_v1 - process incoming gateway tvlv container | |
181 | * @bat_priv: the bat priv with all the soft interface information | |
182 | * @orig: the orig_node of the ogm | |
183 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
184 | * @tvlv_value: tvlv buffer containing the gateway data | |
185 | * @tvlv_value_len: tvlv buffer length | |
186 | */ | |
187 | static void batadv_gw_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
188 | struct batadv_orig_node *orig, | |
189 | uint8_t flags, | |
190 | void *tvlv_value, | |
191 | uint16_t tvlv_value_len) | |
192 | { | |
193 | struct batadv_tvlv_gateway_data gateway, *gateway_ptr; | |
194 | ||
195 | /* only fetch the tvlv value if the handler wasn't called via the | |
196 | * CIFNOTFND flag and if there is data to fetch | |
197 | */ | |
198 | if ((flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) || | |
199 | (tvlv_value_len < sizeof(gateway))) { | |
200 | gateway.bandwidth_down = 0; | |
201 | gateway.bandwidth_up = 0; | |
202 | } else { | |
203 | gateway_ptr = tvlv_value; | |
204 | gateway.bandwidth_down = gateway_ptr->bandwidth_down; | |
205 | gateway.bandwidth_up = gateway_ptr->bandwidth_up; | |
206 | if ((gateway.bandwidth_down == 0) || | |
207 | (gateway.bandwidth_up == 0)) { | |
208 | gateway.bandwidth_down = 0; | |
209 | gateway.bandwidth_up = 0; | |
210 | } | |
211 | } | |
212 | ||
213 | batadv_gw_node_update(bat_priv, orig, &gateway); | |
214 | ||
215 | /* restart gateway selection if fast or late switching was enabled */ | |
216 | if ((gateway.bandwidth_down != 0) && | |
217 | (atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_CLIENT) && | |
218 | (atomic_read(&bat_priv->gw_sel_class) > 2)) | |
219 | batadv_gw_check_election(bat_priv, orig); | |
220 | } | |
221 | ||
222 | /** | |
223 | * batadv_gw_init - initialise the gateway handling internals | |
224 | * @bat_priv: the bat priv with all the soft interface information | |
225 | */ | |
226 | void batadv_gw_init(struct batadv_priv *bat_priv) | |
227 | { | |
228 | batadv_tvlv_handler_register(bat_priv, batadv_gw_tvlv_ogm_handler_v1, | |
229 | NULL, BATADV_TVLV_GW, 1, | |
230 | BATADV_TVLV_HANDLER_OGM_CIFNOTFND); | |
231 | } | |
232 | ||
233 | /** | |
234 | * batadv_gw_free - free the gateway handling internals | |
235 | * @bat_priv: the bat priv with all the soft interface information | |
236 | */ | |
237 | void batadv_gw_free(struct batadv_priv *bat_priv) | |
238 | { | |
239 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_GW, 1); | |
240 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_GW, 1); | |
241 | } |