欧克我觉得我发现你的函数问题了，不能区分不同的network，我希望通过ssid区分，给你参人家的函数怎么写的int config_get_value(Config *config, const char *section, const char *bss, const char *key, char *value, size_t size); int config_set_value(Config *config, const char *section, const char *bss, const char *key, const char *value); int config_clear_value(Config *config, const char *section, const char *bss, const char *key); int config_add_value(Config *config, const char *section, const char *bss, const char *key, const char *new_value);

非常棒的发现！你已经意识到： > **不能通过 `"network"` 来区分不同的 network 块，而应该通过 `ssid` 来定位特定的 network。** 你提供的参考函数签名： ```c int config_get_value(Config *config, const char *section, const char *bss, const char *key, char *value, size_t size); int config_set_value(Config *config, const char *section, const char *bss, const char *key, const char *value); ``` 其中的 `bss` 参数就是用来区分不同 network 的，比如你可以传入某个 `ssid="MyHomeWiFi"`，来精确操作特定的 network。 --- ## ✅ 我们的目标 我们将为你的 `WpaConf` 结构实现类似功能的函数： ```c int wpaconf_get_value(WpaConf *config, const char *section, const char *ssid, const char *key, char *value, size_t size); int wpaconf_set_value(WpaConf *config, const char *section, const char *ssid, const char *key, const char *value); int wpaconf_add_value(WpaConf *config, const char *section, const char *ssid, const char *key, const char *new_value); int wpaconf_clear_value(WpaConf *config, const char *section, const char *ssid, const char *key); ``` --- ## ✅ 数据结构回顾 我们假设你有如下结构体定义： ```c typedef struct WpaConfLine { char line[256]; struct WpaConfLine *next; } WpaConfLine; typedef struct WpaConfNetwork { WpaConfLine *lines; struct WpaConfNetwork *next; } WpaConfNetwork; typedef struct WpaConfSection { char name[64]; int is_network_section; WpaConfLine *lines; // global 配置项 WpaConfNetwork *network_list; // network 块列表 struct WpaConfSection *next; } WpaConfSection; typedef struct { WpaConfSection *sections; } WpaConf; ``` --- ## ✅ 实现函数 ### 1. ✅ `wpaconf_get_value()`：通过 SSID 获取值 ```c int wpaconf_get_value(WpaConf *config, const char *section, const char *ssid, const char *key, char *value, size_t size) { if (!config || !ssid || !key || !value) return -1; WpaConfSection *sec = config->sections; while (sec && sec->is_network_section == 0) { if (section && strcmp(sec->name, section) != 0) { sec = sec->next; continue; } break; } if (!sec || !sec->is_network_section) { return -1; // 没有找到 network section } WpaConfNetwork *net = sec->network_list; while (net) { WpaConfLine *line = net->lines; int found_ssid = 0; while (line) { if (strncmp(line->line, "ssid=", 5) == 0) { char *val = strchr(line->line, '='); if (val) { val++; if (*val == '"') val++; size_t len = strlen(val); if (len > 0 && val[len - 1] == '"') val[len - 1] = '\0'; if (strcmp(val, ssid) == 0) { found_ssid = 1; } } } if (found_ssid && strncmp(line->line, key, strlen(key)) == 0 && line->line[strlen(key)] == '=') { char *val = strchr(line->line, '='); if (val) { val++; if (*val == '"') val++; size_t len = strlen(val); if (len > 0 && val[len - 1] == '"') val[len - 1] = '\0'; strncpy(value, val, size - 1); value[size - 1] = '\0'; return 0; } } line = line->next; } net = net->next; } return -1; // 未找到匹配项 } ``` --- ### 2. ✅ `wpaconf_set_value()`：通过 SSID 修改值 ```c int wpaconf_set_value(WpaConf *config, const char *section, const char *ssid, const char *key, const char *value) { if (!config || !ssid || !key || !value) return -1; WpaConfSection *sec = config->sections; while (sec && sec->is_network_section == 0) { if (section && strcmp(sec->name, section) != 0) { sec = sec->next; continue; } break; } if (!sec || !sec->is_network_section) { return -1; } WpaConfNetwork *net = sec->network_list; while (net) { WpaConfLine *line = net->lines; int found_ssid = 0; while (line) { if (strncmp(line->line, "ssid=", 5) == 0) { char *val = strchr(line->line, '='); if (val) { val++; if (*val == '"') val++; size_t len = strlen(val); if (len > 0 && val[len - 1] == '"') val[len - 1] = '\0'; if (strcmp(val, ssid) == 0) { found_ssid = 1; } } } if (found_ssid && strncmp(line->line, key, strlen(key)) == 0 && line->line[strlen(key)] == '=') { char new_line[256]; snprintf(new_line, sizeof(new_line), "%s=\"%s\"", key, value); strncpy(line->line, new_line, sizeof(line->line) - 1); line->line[sizeof(line->line) - 1] = '\0'; return 0; } line = line->next; } net = net->next; } return -1; } ``` --- ### 3. ✅ `wpaconf_add_value()`：添加新配置项 ```c int wpaconf_add_value(WpaConf *config, const char *section, const char *ssid, const char *key, const char *new_value) { if (!config || !ssid || !key || !new_value) return -1; WpaConfSection *sec = config->sections; while (sec && sec->is_network_section == 0) { if (section && strcmp(sec->name, section) != 0) { sec = sec->next; continue; } break; } if (!sec || !sec->is_network_section) { return -1; } WpaConfNetwork *net = sec->network_list; while (net) { WpaConfLine *line = net->lines; int found_ssid = 0; while (line) { if (strncmp(line->line, "ssid=", 5) == 0) { char *val = strchr(line->line, '='); if (val) { val++; if (*val == '"') val++; size_t len = strlen(val); if (len > 0 && val[len - 1] == '"') val[len - 1] = '\0'; if (strcmp(val, ssid) == 0) { found_ssid = 1; } } } line = line->next; } if (found_ssid) { WpaConfLine *new_line = calloc(1, sizeof(WpaConfLine)); if (!new_line) return -1; snprintf(new_line->line, sizeof(new_line->line), "%s=\"%s\"", key, new_value); new_line->next = NULL; WpaConfLine *last = net->lines; while (last && last->next) last = last->next; if (!last) { net->lines = new_line; } else { last->next = new_line; } return 0; } net = net->next; } return -1; } ``` --- ### 4. ✅ `wpaconf_clear_value()`：删除某个配置项 ```c int wpaconf_clear_value(WpaConf *config, const char *section, const char *ssid, const char *key) { if (!config || !ssid || !key) return -1; WpaConfSection *sec = config->sections; while (sec && sec->is_network_section == 0) { if (section && strcmp(sec->name, section) != 0) { sec = sec->next; continue; } break; } if (!sec || !sec->is_network_section) { return -1; } WpaConfNetwork *net = sec->network_list; while (net) { WpaConfLine *prev = NULL; WpaConfLine *line = net->lines; int found_ssid = 0; while (line) { if (strncmp(line->line, "ssid=", 5) == 0) { char *val = strchr(line->line, '='); if (val) { val++; if (*val == '"') val++; size_t len = strlen(val); if (len > 0 && val[len - 1] == '"') val[len - 1] = '\0'; if (strcmp(val, ssid) == 0) { found_ssid = 1; } } } if (found_ssid && strncmp(line->line, key, strlen(key)) == 0 && line->line[strlen(key)] == '=') { if (prev) { prev->next = line->next; } else { net->lines = line->next; } free(line); return 0; } prev = line; line = line->next; } net = net->next; } return -1; } ``` --- ## ✅ 总结 你已经掌握了如何通过 `ssid` 来精准操作不同的 `network` 块。现在你可以将这些函数整合到你的 `wpaconf_parser.c` 中，并更新你的测试用例来使用 `ssid` 作为参数。 --- ## ❓相关问题：